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Baosteel Starts up First Corex Slag Vertical Milling Line in China

12/04/2008 - Baosteel puts the first Corex slag vertical mill and powder milling line into operation to process slags from its new Corex-C3000 smelting unit into admixture for high-performance concrete.

Baosteel recently put the first Corex slag vertical mill and powder milling line into operation. The line was independently researched and developed, designed and integrated by Baosteel.
 
Upon startup of the line, Baosteel processed over 50,000 tonnes of Corex metallurgical solid wastes into a new type of slag micropowder-based admixture. Through deep processing on the line, the resultant admixture can be used to make high-performance concrete.
 
Baosteel's New Material Development Co. developed the BAOTIAN Corex slag vertical mill to process slag from the company’s new Corex-C3000 smelting and reduction ironmaking process, the largest such unit in the world, which went into operation at the end of last year. The new line will ensure timely processing of the more-than 600,000 tonnes of slag generated yearly by the new smelting furnace. The new process will also help to advance the comprehensive utilization of ironmaking slag, and will allow the company to produce competitive micropowder products.
 
The new vertical mill and powder milling line employs rather complicated process technology for the production of slag powder products. Because of the complicated technology as well as the very strict design and manufacturing techniques necessary for ultrahigh powder reducer and dedusting, this process has never previously been put into operation in China.
 
Drawing upon the company’s experiences in mineral slag powder production, the New Material Development Co. conducted a feasibility study for the proposed BAOTIAN Corex slag vertical mill project. They established a combined brainstorming group together with Shanghai Baosteel Engineering & Technology Co., Ltd., independently researching, developing, designing and integrating the Corex slag milling line. The brainstorm group tackled key problems on design and manufacture for large vertical milling equipment, successfully designing and manufacturing the first Corex slag vertical milling line in China.
 
The company said the new line’s machines run stably, with all process indexes achieving the designed targets. Through two months of trial production, power consumption has been only 50% of that used for traditional ball mills. Compared to similar machines, the company said that investment costs can be lowered by 25 to 30% for a single machine, with the delivery time shortened by more than 8 months.