The Technical Report No. 9 Subcommittee of the Ladle and Secondary Refining Technology Committee met in Cleveland, Ohio, at Middough Inc. on Nov. 21, 2008. The focus of the meeting was to complete the final revisions to Technical Report No. 9. After introductions, the subcommittee reviewed the improvements to the report to bring the new members up-to-date. The new report will be more consistent with other AIST technical reports. The progression of design and construction of a ladle shell is consistent with industry practice, and the measurement units have been removed where possible to allow the report to be more international in acceptance. The sections of the report were then reviewed to ensure completion prior to the report going to ballot draft. The Owner’s Information Sheet was modified in structure to follow current design practice by fabricators. The members also reviewed Dr. Millet Wei’s comments on the report draft. A historical perspective will be developed on all the equations and derivations for future reference. The section on refractories will eventually be expanded, but for this revision, the section reflects the current industry rate of change. As in past revisions, a step-by-step example of designing a ladle shell will be included. A member asked that a graph detailing slag density be included in the revision, but it was determined that, with steelmaking slag being significantly lighter than molten steel, the brimful capacity of the ladle would still dictate the stability of the ladle. Other typographical oversights or omissions were corrected throughout the text and figures. The section on flat bottom ladles included a comment that reinforcing plates only provide additional strength to riveted flat bottoms. Additionally, the section on dished bottoms was subdivided into type (dished, torispherical or ellipsiodal bottom) for clarity in the equations. In addition to the design example, the appendix for ladles with more than two stiffener bands requires final updating prior to ballot draft. The next meeting will be in February 2009 in Cleveland, Ohio.
The Ladle and Secondary Refining Technology Committee (LSRTC) held their fall meeting on Oct. 29–30, 2008, in Canton, Ohio. The members initially met in the afternoon of Oct. 29 at The Timken Co. for a tour of the steelmaking, ingot processing and rolling operations at Timken’s Faircrest facility. The attending members then participated in the AIST Northeastern Ohio Member Chapter reception at the Fox & Hound. LSRTC members had the opportunity to talk with members of AIST from Northeast Ohio. On Oct. 30, the LSRTC held a business meeting. Following introductions and a review of the AIST Anti-Trust Guidelines, a round table discussion of safety incidents was conducted, during which members could discuss safety practices and events in the steel industry. Chad Clark, chair of the LSRTC, then outlined future activities of the committee. The committee consensus was that the current format of three meetings per year would be maintained, with the winter meeting focused on round table discussions based on a pre-meeting survey. The spring meeting will be a business meeting at AISTech. The fall meeting will be highlighted by technical presentations on fundamental practices and procedures in steel chemistry refining. Both the winter and fall meetings would be off-location and include a plant tour to further increase the technical focus of the meetings. The members also created a list of key individuals in molten steel refining who would be an asset to the committee’s membership. The position of “membership chair” was created to assist in communicating the LSRTC mission to the individuals and invite them to be members of the committee. A list of presentations were organized for the winter meeting to kick off the technical pursuit of the committee. Ruth Engel and Rick Backous have been asked to present ladle refractory basic practices and programs; Stewart Robinson will be presenting the fundamentals behind inclusion removal; Eugene Pretorious has been asked to present the basics of clean steel practices; and Larry Heaslip and Larry Wolfe have been asked to present the fundamentals of slag design and deoxidation. The meeting, to be held March 18–19, will include a tour of Nucor Steel Tuscaloosa Inc., and it will be co-located with the AIST Ladle Refractory Training Seminar and the AIST Birmingham Member Chapter winter meeting, which will include a keynote address. A review by the Refractory Training Subcommittee was given regarding the status of the training seminar program, which will be held March 17–18. The members then held a round table discussion regarding topics related to ladle alloying, cost-saving initiatives, ladle furnace practices and ladle refractory programs. An update regarding the status of the revised Technical Report No. 9, Specification for the Design and Use of Ladles was provided by members of the TR9 Subcommittee. The document has been finalized and is being sent to the LSRTC for ballot review. The document should be published in the second half of 2009. The papers chair then provided an update on the LSRTC-sponsored technical sessions for AISTech 2009. A note was made that the AIST Refractory Systems Technology Committee will be co-sponsoring the Ladle Refractory and Slidegate session. Other sessions were reviewed and restructured accordingly to ensure quality Ladle and Secondary Refining sessions. The meeting concluded with four members volunteering to review the Ladle and Secondary Refining Best of Session papers from AISTech 2008 for the 2009 Ladle and Secondary Refining Best Paper Award, which will be presented at the LSRTC business meeting during AISTech 2009.
The AIST Technical Report No. 9 Subcommittee of the Ladle and Secondary Refining Technology Committee (LSRTC) met on July 22 in Cleveland, Ohio, at Middough Associates to finalize the revisions to Technical Report No. 9 — Design and Use of Ladles. In the Materials section of the report, the Metallurgical Considerations were expanded to include a provision that the steel used to construct the ladle sidewall and bottom must be of pressure vessel quality, and that operating a ladle outside its designed parameters could cause the carbide phases in the steel shell to change from carbon or carbon-molybdenum to graphite, causing premature failure. Furthermore, information was added to the Maintenance and Repair section of the report to advise a ladle owner to evaluate the metallurgical quality of the ladle shell at specific intervals to ensure that no changes in the microstructure had occurred. The Owner’s Information Sheet was redesigned to reflect how an owner today provides information to a fabricator for ladle construction; specifically, the reference to riveted construction was removed, as the group felt that new ladles would not be constructed using rivets. Finally, the section on inspection was updated to ensure that weldments were inspected properly, depending on whether the welds were on a new ladle or in a repair. The committee has now finished the revisions to the document. There will be a final meeting of the committee in November before the report goes to ballot draft. Each member will receive sections of the report to review for consistency and accuracy in figures, symbols and equations.
The Ladle and Secondary Refining Operating Committee (LSROC) held their annual Spring meeting on May 6, 2008, during AISTech 2008. Kevin Cotchen, LSROC chair, greeted everyone and thanked them for attending the meeting and supporting the LSROC technical sessions at AISTech. The 2008 Ladle and Secondary Refining Best Paper Award was presented to Dr. Gordon Irons of McMaster University for his paper entitled, “Monitoring Ladle Eye Dynamics Using Multivariate Statistical Methods,” presented at AISTech 2007. An update was given regarding the integration of the AISI Manufacturing Committees and the AIST Operating Committees. The AISI Manufacturing Committee on Primary and Secondary Oxygen Steelmaking has been integrated with the LSROC and the AIST Oxygen Steelmaking Operating Committee. The new committees are now known as the AIST Ladle and Secondary Refining Technology Committee (LSRTC) and the AIST Oxygen Steelmaking Technology Committee. The leadership will work together as co-chairs for the first several meetings until leadership is elected for the unified committee. A producer-only round table will be a part of all future LSRTC meetings. The committee then held an election of officers. The former vice chair and papers chair were moved up one position, and a new papers chair was elected for 2008–2009. A revision was made to the committee mission statement, integrating safety into the text. An update was given by the Ladle Refractory Training Subcommittee regarding the status of the Ladle Refractory Training Seminar, which is scheduled to be held in Birmingham, Ala., March 17–18, 2009. It will consist of a one-day training seminar and a half day dedicated to a tour. The new LSRTC will have their first meeting in the fall of 2008 at The Timken Co. in Canton, Ohio, and will tentatively schedule their winter meeting in conjunction with the Refractory Training Seminar in Birmingham, Ala.
February 5-6 , 2008 - The Ladle and Secondary Refining Operating Committee (LSROC) met on Feb. 5–6 in Texas for their winter meeting. The members met on Feb. 5 at Nucor Steel–Texas for an overview and tour of the recently built meltshop and caster. A single AC furnace taps 100 tons of steel approximately every 25 minutes. The heat is then treated at a twin-station ladle metallurgy facility and delivered to the 5-strand billet caster. The employees at Nucor Texas were very proud of their high production capabilities and excellent safety record. From the bottom to the top, all the employees looked for ways to make sure that “no one gets hurt on [their] shift today.” The business and technical portion of the meeting was held on Feb. 6. Members and guests introduced themselves, and reviews of the AIST Antitrust Guidelines and AIST announcements were given. The committee chair gave an update on the five LSROC technical sessions organized for AISTech 2008. Out of 27 potential presentation slots, the committee has 26 papers identified and 23 papers confirmed. All the authors will be contacted by their respective session chairs to ensure that their final papers and registrations for AISTech are completed. A review was then provided regarding the integration of committee activities between AISI and AIST. The leadership of the AISI committees related to the LSROC activities will be contacted to begin arranging co-located meetings and joint activities. The members then began a discussion on developing a steelmaking refractory training seminar, which would be used to train new hires and individuals unfamilar with refractories regarding their properties, proper material selection, uses, and how operations impact their performance. A subcommittee chaired by Jimmy Barrett of ArcelorMittal Sparrows Point was organized, and members volunteered to assist Mr. Barrett. Refractory suppliers and steel producers will jointly develop an outline for the training seminar to ensure the material covered will be beneficial to their target audience. The LSROC also intends to have a plant tour with the conference, as well as co-locate the conference with an AIST Member Chapter event, as other AIST Training Seminars have done. The technical presentations concluded the meeting. Rick Hrechko of Gerdau Ameristeel–Sand Springs presented the results of a ladle stir survey that was completed in 2007. Monty Parker of Nucor Steel–Texas presented an overview of the recent meltshop installation at Nucor Texas and their ladle refractory program. Bill Boesen, LWB Refractories, presented his study on ladle refractory designs at Charter Steel–Saukville. The next LSROC meeting will be at AISTech 2008 on Tuesday, May 6.
October 3-4 , 2007 - The Oxygen Steelmaking (OSOC) and Ladle and Secondary Refining (LSROC) operating committees held a joint meeting on Oct. 3–4 in Sault Ste. Marie, Ont., Canada. The meeting began with a tour of the Algoma Steel No. 2 BOSP facility. Of particular interest to the groups were Algoma Steel’s BOF hood system, slag control devices, slag splashing practices and their ladle metallurgy station. Following the tour, the committees held a group dinner as an additional opportunity to meet old and new friends and to share ideas. The technical presentations kicked off the meeting on Oct. 4. Algoma Steel and ArcelorMittal – Inland No. 4 Steel Production both presented their BOF slag splashing practices. ArcelorMittal – Sparrows Point presented their ladle lining practices, which have helped them achieve 400 heats per ladle lining. GSB Group presented their technology on stirring lances, while RHI AG presented a European perspective on ladle lining and purging practices. The Ladle and Secondary Refining Operating Committee also presented information on the proper selection of refractories for steel ladles. Following the technical presentations, the two committees conducted separate business meetings.
During the ensuing business meeting, the OSOC reviewed the progress made on their technical sessions for AISTech 2008. Currently, six sessions are planned on such topics as environmental programs, maintenance and equipment, productivity, slag carryover and a panel discussion on scrap processing. The members then discussed the current status of the BOF Roundup, which was printed in the November 2007 issue of Iron & Steel Technology magazine. The meeting wrapped up with a review of the OSOC’s study tour of Germany and joint meeting with VDEh Stahlinstitut in November. Thirty members planned to attend the week-long event, which includes five steel mill tours, technical presentations by both North American and German steel producers, visits to three steel mill equipment suppliers, as well as Stahl 2007 — Day of Steel in Düsseldorf on Nov. 8. The next OSOC meeting will be Jan. 23–24, 2008, in Westlake, Ohio. This meeting will be held in conjunction with a technology kickoff event by Energy Industries of Ohio and Oak Ridge National Laboratory on their latest advancement in BOF hood material. Also included in the meeting will be a tour of Republic Engineered Products – Lorain Works and additional technical discussions on lance systems, lance practices and maintenance.
The LSROC finalized their paper selections for AISTech 2008 and organized volunteers for chairing the technical sessions. Currently, the LSROC plans to have sessions on ladle refractories, ladle metallurgy and inclusion control. They also continued discussion on developing a ladle refractory training program for the steel industry, to be held sometime in 2008. The next meeting was planned for February 2008, with the location to be determined.
August 28 , 2007 - The Ladle Design Subcommittee of the Ladle and Secondary Refining Operating Committee met on Aug. 28 at Middough Associates in Cleveland, Ohio, to finalize the revisions for Technical Report No. 9, Specification for the Design and Use of Ladles (TR9). The table detailing minimum sidewall plate thickness (formerly Table I-7) was revised, as material selection for ladle sidewalls should be based on design service temperatures. Figures were created to accurately show bottom designs for flat-bottomed, flat-bottomed with support ribs, dished-bottomed and ellipsoidal-bottomed ladles. A note was added that reinforcing plates in ladle bottoms minimize only bottom refractory deflection and do not aid the structural integrity of the ladle bottom. The section on design shear stress was updated and simplified to refer to the newly created Appendixes E and F, which contain the design stresses, allowable stresses and the moduli of elasticity tables for ladle components. The symbology was then reviewed and updated to reflect the many changes to equations and figures that have occurred during the revision to the report. It was also determined that a committee member will create a design example using the new revisions to be included in the final print, and another member volunteered to review the Owner’s Information Sheet to ensure that the requested information is accurate with current practices of designing ladles through a fabricator. The next Ladle Design Subcommittee meeting will be held mid-December at Middough Associates, where the committee will complete the revisions to TR9 and prepare the document for ballot draft.
May 9, 2007 - The Ladle and Secondary Refining Operating Committee (LSROC) held a brief lunch meeting on May 9 in conjuction with AISTech 2007. After attendee introductions, an update on committee membership and a few association announcements, the members elected officers to lead the committee for the following year. Kevin Cotchen, SMS Demag, was elected chair; Chad Clark, Gallatin Steel, was elected vice chair; and Jörg Peter, Cascade Steel, was elected papers chair. A discussion ensued regarding pre-planning for the LSROC sessions for AISTech 2008, to be held in Pittsburgh, Pa., May 5–8, 2008. A subcommittee was organized to assist the papers chair in his efforts to coordinate sessions for the conference, and its members will begin actively pursuing papers in the areas of inclusion removal, vacuum degassing, ladle refractories and ladle metallurgy. The committee will also consider supporting the AIST Northeastern Ohio Member Chapter in its AISTech 2008 Preview Meeting in March 2008. The LSROC then welcomed Mike Strelbisky, of Tallman Bronze, the newly elected chair of the Oxygen Steelmaking Operating Committee (OSOC). Mr. Strelbisky invited the LSROC to join the OSOC members in a joint meeting on Oct. 3–4, 2007, in Sault Ste. Marie, Ont., Canada. The meeting will include technical presentations on ladle treatment and a tour of the BOSP at Algoma Steel.
March 29, 2007 - The Ladle Design Subcommittee of the Ladle and Secondary Refining Operating Committee met at Middough Associates in Cleveland, Ohio, on March 29 to finalize the revisions to AIST Technical Report No. 9, Specification for Design and Use of Ladles. After member introductions and an update on AIST activities, appendixes were created to provide tabulated values for steel materials on tensile, yield and allowable stresses, as well as a table for modulus of elasticity. An additional appendix was created for steel grades that have been discontinued for ladle fabrication but are still used in many steel ladles in the industry. Information on rivets and body-bound bolts was confirmed and inserted into an appendix for those components. The committee then heard comments by a member who fabricates ladles and had noticed potential conflicts between the revised document and actual practice. A discussion ensued regarding the gap tolerances between the trunnion block and sidewall shell, and the document was revised to reflect real-life practices. Revisions were then made concerning mandatory, recommended and suggested nondestructive examination on final fabricated ladles, also to reflect current practice. The meeting concluded with a discussion on the few remaining report topics requiring revision, and members were assigned the responsibility to complete those revisions by the next meeting.
February 7, 2007 - On Feb. 7, 2007, the Electric Steelmaking Operating Committee (ESOC) and the Ladle and Secondary Refining Operating Committee (LSROC) met in San Antonio, Texas, to participate in a tour of the CMC Steel Texas meltshop. The tour was held in conjunction with AIST’s Specialty Conference, “Modern Electric Furnace Steelmaking — A Practical Training Seminar.” The tour included the recently installed EAF and caster at CMC Texas.
On Feb. 8, both committees attended technical presentations focused on EAF and ladle refining. John Jetkiwicz, incoming AIST Electric Steelmaking Technology Division board member, gave a presentation on the new EAF installation at CMC Steel Texas and its future production objectives. Jeremy Jones of Nupro Inc. gave a presentation on the technical aspects of utilizing a near-infrared camera to limit EAF slag carryover into the refining ladle. Mike Butler of Gerdau Ameristeel–Beaumont presented fundamental information on ladle slag treatment for both aluminum- and silicon-killed steelmaking practices. Monty Parker Jr. of Nucor Steel–Texas gave an overview of and update on the new meltshop at Nucor Steel–Texas. Following the technical discussion, the ESOC approved the name change for its sister Operating Commitee, the Specialty Steelmaking Operating Committee; the new name will be the Specialty Alloy and Foundry Operating Committee, to reflect the membership’s diverse background, which includes stainless steelmakers as well as alloy producers and foundries. The ESOC then reviewed the status of the Electric Steelmaking technical sessions for AISTech 2007. Additional session chairs were identified and were instructed to contact the authors in order to ensure the authors’ registration and timely submission of technical papers. “Modern Electric Furnace Steelmaking — A Practical Training Seminar,” which was in progress, was then reviewed. The committee agreed to continue the current program’s format for 2008 and identified potential locations for next year’s seminar. The ESOC adjourned the business meeting prior to lunch.
After lunch, the Ladle and Secondary Refining Operating Committee had a business meeting, in which the AISTech 2007 LSROC technical sessions were discussed. Additional papers were added to the sessions, and additional session chairs were identified. The papers chair for the committee agreed to contact the authors of the last remaining uncommitted papers for the sessions. The members then discussed potential nominees for the 2008 AIST Association-level Awards. Suggestions were made for the 2008 Sendzimir Award, which is awarded for significant contributions to the production of iron and steel. The potential candidates’ backgrounds will be compiled and reviewed to determine if any of the individuals should be nominated for such a prestigious award. A discussion was also held on potential topics for the upcoming fall LSROC meeting. Suggestions were made to further the subject of ladle stirring and its impact on steel production and steel cleanliness. The fall meeting location will be determined at the LSROC meeting held during AISTech 2007.
October 10, 2006 - The Ladle Design Subcommittee of the Ladle and Secondary Refining Operating Committee held a half-day meeting on Oct. 10, 2006, at WCI Steel in Warren, Ohio. The members continued their revisions to Technical Report No. 9, Specifications for the Design and Use of Ladles. The committee reviewed and revised the figures for the report and continued to coordinate the symbology appendix with the text of the document. A discussion was also held concerning the application of the fabrication section to the actual construction of a ladle. Revisions to the fabrication section were made as a result of the discussion. Following the meeting, the Ladle Design Subcommittee joined the Ladle and Secondary Refining Operating Committee, Continuous Casting Operating Committee and the AISI Strand Casting Committee for a tour of the steelmaking facilities at WCI Steel. The next meeting for the Ladle Design Subcommittee will be Jan. 18 at Middough Associates, Cleveland, Ohio.
October 10-11, 2006 - The Continuous Casting Operating Committee (CCOC) and the Ladle and Secondary Refining Operating Committee (LSROC) met with the AISI Strand Casting Committee in Warren, Ohio, on Oct. 10–11, 2006. The meeting began with the three committees touring the BOF steelmaking and casting facilities at WCI Steel, Warren, Ohio. After the tour, the committees held a brief question-and-answer session and attended a reception and dinner with the AIST Northern Ohio Chapter. On Oct. 11, the LSROC and the CCOCheld a brief business meeting to update their memberships concerning the Continuous Casting Training Seminar program, the current status of the Operating Committees’ technical sessions for AISTech 2007, and upcoming meeting plans. Following the business meeting, the AISI Strand Casting Committee again joined the meeting for a technical discussion. Leading into the technical discussion was an awards presentation ceremony. The LSROC presented the 2005 Best Paper Award to Material Handling Specialties for their paper, “Ladle Relining Lifts Equipment — Ergonomic and Technical Considerations,” and the 2006 Best Paper Award to P.K. Ghosh (formerly of Nucor Steel) and T.W. Junker and Rob Rote of Midwest Instrumentation Co. Inc. for their paper, “The Development of a New Approach to Deoxidation at Nucor Steel–Hickman.” The CCOC presented the 2005 Best Paper Award to Carlos Cicutt of TAMSA for his paper, “Analysis of Mold Friction in a Continuous Casting Machine for Round Bars,” and the 2006 Best Paper Award to Dofasco Inc. for their paper, “Mixed Grade Model Development and Implementation.” The technical presentations focused on secondary refining’s impact on castability. The five presentations were as follows: “Introduction to Inclusions” by Stuart Gray of Gerdau Ameristeel–Beaumont (Texas); “Reduction of Surface Defects on 0.25% C Hot Band at Nucor Steel–Indiana” by Scott McDougal; “Secondary Refining Practices and Their Influence on Castability” by Dr. Paul Kaushik of Mittal Steel USA; “Recent Study of Casting Issues Using Rapid Inclusion Analysis” by Scott Story of U. S. Steel; and “The Effect of Inclusions on Castability” by Eugene Pretorius of Nucor Steel–Berkeley. The next meeting for the LSROC will be co-located with the AIST Modern Electric Furnace Training Seminar, Feb. 5–9 in San Antonio, Texas, and will include a tour of CMC Steel Texas. The CCOC will co-locate their winter meeting with the AIST Southeast Member Chapter meeting on March 4–6 in Myrtle Beach, S.C., and will include a tour of Nucor Steel–South Carolina (Darlington) and technical presentations.
June 27, 2006 - The Ladle and Secondary Refining Operating Committee’s Ladle Design Subcommittee met on June 27 at Middough Associates in Cleveland, Ohio, to continue work on the revision of Technical Report No. 9, Specification for the Design and Use of Ladles. After an update on the current status of the revisions, the committee began the construction of two appendices on material stresses and allowable stresses. The refractories section was updated to include alumino-magnesia-carbon refractory. The design section was updated with a section on design limitations and some general corrections to formulas and text. Finally, all the figures were reviewed for accuracy of content and description. The subcommittee will meet again on Oct. 9–10, 2006, in Warren, Ohio, prior to the joint meeting between the Ladle and Secondary Refining Operating Committee and Continuous Casting Operating Committee, which will include a tour of WCI Steel and a joint discussion with the AISI Strand Casting Committee.
May 2, 2006 - The Continuous Casting Operating Committee met during AISTech 2006 on May 2. An election of officers was held and an update regarding the continuous casting technical sessions for AISTech 2006 was given. A review of the Continuous Casting Training Seminar, to be held in Birmingham, Ala., in November 2006, was also provided. A discussion was then held regarding the fall meeting and the logistics of a joint meeting with the AISI Strand Casting Committee. The joint meeting will be held in Warren, Ohio, on Oct. 10–11. The Ladle and Secondary Refining Operating Committee will also participate in the meeting.
May 1, 2006 - The Ladle and Secondary Refining Operating Committee held a luncheon meeting on May 1 during AISTech 2006. Officer elections were held, and a subcommittee was formed to evaluate the best ladle and secondary refining papers from AISTech 2006. The committee also discussed their ladle and secondary refining survey, which will be used to develop future technical discussions for their meetings. Their next meeting will be co-located with the Continuous Casting Operating Committee and the AISI Strand Casting Committee and will be held in Warren, Ohio, on Oct. 10–11.
February 16-17, 2006 - The Ladle and Secondary Refining Operating Committee held a winter meeting in Huntsville, Ala. on Feb. 16–17, 2006. The meeting began with member introductions and the business portion of the agenda. After a discussion on membership and the AIST announcements, the committee discussed the current status of their AISTech 2006 technical sessions. The committee is sponsoring a session on ladle refining and another on ladle refractories. The committee then agreed to finalize a vote for the AISTech 2005 Best Ladle Paper when the committee meets at AISTech 2006. The award will be presented at the committee’s fall meeting. An overview was given regarding the AIST Inter-Technology Division meeting, which was held in Phoenix, Ariz., in February. It was suggested at that meeting to rename the Ladle and Secondary Refining Operating Committee as simply Secondary Refining Operating Committee and to move the Ladle Design Subcommittee to the Material Handling Technology Division. The committee approved the subcommittee move but voted to keep the name “Ladle and Secondary Refining Operating Committee,” since almost all secondary refining occurs in the ladle. The committee then approved the nomination of the Continuous Casting Operating Committee chair to be the AIST Continuous Casting Technology Division board representative. The committee discussed the potential of incorporating some secondary refining information into the upcoming AIST Roundups, and a one-page committee member questionnaire was developed to assist their efforts. The day’s meeting concluded with a review of the tools available to AIST committee members through the AIST Web site, www.aist.org: the Operating Committee Listserver; the Operating Committee Member’s Only area; the flexibility to post meeting presentations, agendas and minutes on that Web site; as well as the tools available on the AIST Member’s Only Web site, Steel News and Steel Links. Following the meeting, the members traveled to the Nucor Steel–Decatur facility. After an overview of the facility by Nathan Fraser, the tour began in the EAF shop and concluded with a walk through the rolling facility and shipping department. The members then held an informal dinner. On Feb. 17, the Ladle and Secondary Refining Operating Committee reconvened for the technical discussion portion of their meeting. Middough Associates presented “An Overview of Flat-bottomed Ladle Configuration,” ABB presented “The Use of EMS in Ladle Refining in Sweden,” and Nucor Steel–Decatur gave a presentation on “The Use of a Tundish Bubbling Block.” All the presentations are available on the LSROCMember’s Only area. The next meeting for the committee will be on May 2 at AISTech 2006 in Cleveland. The fall meeting will be held at WCI Steel in Warren, Ohio, in conjunction with the Continuous Casting Operating Committee. Next winter’s meeting is tentatively scheduled to be held at CMC Steel Texas in Seguin, Texas.
September 29-30, 2005 - The
Ladle and Secondary Refining Operating Committee met in Pittsboro,
Ind., on Sept. 29–30. The business meeting was
held in the morning of Sept. 29. The main item on the agenda
was the organization of their technical sessions for AISTech
2006, which will consist of two six-paper sessions. Representatives
from Steel Dynamics Inc. Bar Products presented an overview
of their steelmaking facility. Following lunch, the committee
toured the SDI Bar Products facility. To kick off the technical
discussion on Sept. 30, the Ladle and Secondary Refining Operating
Committee vice chair presented their AISTech 2004 Best Paper
Award to Eugene Pretorius of Nucor Steel and Kevin Cotchen of
SMS Demag for their presentation entitled, “Twin Tank
Vacuum Degassing Facility at Nucor Berkeley.” Following
the award presentation, three presenters gave technical overviews
of ladle stir practices. The next committee meeting will be
Feb. 16–17, 2006, in Decatur, Ala., and will include a
tour of Nucor Steel – Decatur and a technical discussion
on calcium injection and inclusion control.
September 29-20, 2005 - The
Ladle and Secondary Refining Operating Committee met for a lunch
meeting at AISTech 2005 in Charlotte, N.C. Following
introductions, the election of officers was held and a succession
process for officers was established. The next meeting will
be in Indianapolis, Ind., Sept 29–30 and will include
a tour of Steel Dynamics’ Bar Mill Div. and a technical
round table discussion on ladle metallurgy.
February 17-18, 2004 - The
Ladle and Secondary Refining Operating Committee met Feb. 17–18
in Mount Pleasant, S.C. A business meeting was held
Feb. 17 to discuss the current status of the Ladle and Secondary
Refining technical sessions for AISTech 2005. Session chairs
were finalized, and program modifications were confirmed. The
committee also discussed guidelines to assist potential presenters
in preparing for a conference. The committee’s next meeting
is scheduled to be held during AISTech 2005. After lunch, the
committee toured the melting and refining facilities at Nucor
Steel–Berkeley. A group dinner was held that night. On
Feb. 18, the committee held the technical portion of the meeting.
Four presentations were given on ladle slag treatment and its
impact on the efficient processing of steel. Pictured to the
right are the presenters (left to right): Ed Erny, Resco Products;
Eugene Pretorius, Nucor Steel; Stewart Robinson, Carbide Industries
LLC; and Randy Rose, WCI Steel.
2004 - The
Ladle Refining Operating Committee held its third meeting of
2004 in Ghent, Ky. The meeting began with a discussion
on establishing a technical forum in the steel industry for
persons interested in ladle metallurgy and secondary steel refining.
To that end, the committee received notice that the AIST Continuous
Casting Operating Committee had unanimously approved their request
to change their name to the AIST Ladle and Secondary Refining
Operating Committee. Also, the committee reviewed a member survey
used to determine the prevailing technical interest of the committee’s
membership. It was established that, at the next meeting, the
committee would have presentations and a round table discussion
on ladle slag treatment. The members then reviewed their inaugural
sessions at AISTech 2004 and held a brief discussion on the
papers rated as the “best of session” for ladle
refining. Following that discussion was a review of the available
abstracts, which the committee organized into the ladle and
secondary refining sessions at AISTech 2005. The committee will
sponsor four sessions for this event. The meeting concluded
with a tour of the steelmaking facilities of the Gallatin Steel
Co. The next meeting will be held Feb. 17–18 with a tour
of Nucor Steel–Berkeley.
October 27, 2004 - The
Design Subcommittee of the Ladle Refining Operating Committee
met at Middough Consulting in Cleveland, Ohio, on Oct. 27. The committee continued their revisions to AIST/AISE Technical
Report No. 9, Specification on the Design and Use of Ladles.
The revisions are being finalized as the document is prepared
for ballot draft.
2004 - The
Ladle Refining Operating Committee held their fall meeting in
Nashville, Tenn., at AISTech 2004. The committee approved
their mission statement and considered a change in the name
of the Operating Committee to better reflect their focus in
the steel industry. The committee then began to plan sessions
for AISTech 2005. Sessions being considered are ladle furnace
design, slag chemistry and detection, ladle refractory inspection
and maintenance, hydrogen control, and capital projects. The
next meeting of the Ladle Refining Operating Committee is Dec.
2 and will include a tour of Gallatin Steel Co.
August 24, 2004 - The
Design Subcommittee of the Ladle Refining Operating Committee
met in Cleveland, Ohio, on Aug. 24 to continue their final revisions
to the AIST/AISE Technical Report No. 9, “Specification
for the Design and Use of Ladles.” The refractory properties table was revised to include alumina-magnesite-carbon
refractories. The symbology was corrected to reflect the revised
report structure, and revisions were made to the appendix on
the design of ladles with three or more stiffener bands. The
figures were reviewed, and notes were made for corrections.
A general discussion took place on the impact of the molten
steel stream to the integrity of the ladle bottom shell. The
topic will be revisited at a future meeting.
June 23, 2004 - The
Design Subcommittee of the Ladle Refining Operating Committee
met on June 23 in Cleveland, Ohio, to continue final revisions
to the AIST/AISE Technical Report No. 9, Specification on the
Design and Use of Ladles. The focus of the meeting was
to coordinate the symbology and formulas in the text with the
Appendix to ensure totality and to eliminate redundancy. The next
meeting will be held on Wednesday, Sept. 15 at AISTech 2004 as
the complete Ladle Refining Operating Committee.
April 22, 2004 - On
April 22, the Ladle Refining Operating Committee met in Cleveland,
Ohio, to review business items and their structure. The
committee elected a chair and chair-elect, followed by a discussion
on the group’s focus. It was agreed that the name, as initially
determined, did not encompass their entire scope of technology.
The committee is determining what process is required to change
the name of this Operating Committee to Ladle and Secondary Refining
Operating Committee. The committee also developed a mission statement.
The committee wrapped up the meeting by creating subcommittees
to oversee particular activities, and they reviewed their technical
sessions for AISTech 2004. The next meeting will be held at AISTech
April 21, 2004 - The
Design Subcommittee of the Ladle Refining Operating Committee
met on April 21 in Cleveland, Ohio. Members continued
their work in revising “AIST Technical Report No. 9, Specification
for the Design and Use of Ladles.” The symbology was reviewed
for consistency and to ensure that all symbols in the text of
the document were included in the appendix. The committee also
reviewed the appendix for riveted ladles.
February 11-12, 2004 - The
Ladle Refining Operating Committee held its inaugural AIST meeting
on Feb. 11-12, 2004. The meeting agenda included a definition
of the committee’s goals, which will encompass all aspects
of secondary steelmaking and refining. The committee then selected
abstracts for AISTech 2004. The committee will sponsor two sessions
on ladle refining. A subcommittee was formed for the Ladle Refining
Operating Committee. This subcommittee will work to revise the
technical report on the Specification for the Design and Use of
Ladles. The next meeting will be held April 21-22, 2004, in Cleveland,