Table of Contents

    • 37

    • Increased Use of Natural Gas in Blast Furnace Ironmaking

      Recent studies have shown that natural gas can be used as a partial coke replacement in the blast furnace. This paper analyzes the possibility of increasing the use of natural gas by introducing it directly to the shaft of the furnace. This is tested theoretically by calculation and through experimental work on the cracking of methane under the expected conditions of the shaft.

    • 44

    • IRONARC: A Cokeless Ironmaking Process

      IRONARC is a plasma-based ironmaking process where electricity is used to provide heat energy. The process has potential to produce iron with energy consumption less than 3,100 kWh/ton iron, which is 977 kWh less than an ideal blast furnace. This paper presents the technology, the status of the development and its way to industrial implementation.

    • 71

    • Case Study: Failure Analysis of a Bulged Blast Furnace Blowpipe

      A detailed failure analysis investigation was undertaken of a blast furnace blowpipe that disruptively failed after 399 days of service. Physical, microstructural and theoretical evidence suggested that the main cause of failure was a service condition never anticipated during design. Recommendations for preventing reoccurrence of such an event are provided.

    • 84

    • In-Process Separation of Zinc From Blast Furnace Offgas Solid Wastes

      This article discusses the concept of using a high-efficiency primary blast furnace offgas dust collector to collect most of the dust and to let small particles with high zinc concentration bypass the primary dust collector. A series of measures is presented to help minimize the zinc concentration in the primary  blast furnace offgas dust prior to its recycling.

    • 333

    • An Overview of Steel Cleanliness From an Industry Perspective

      Steelmaking practices are typically developed to minimize the harmful inclusions that lead to steel defects. This paper focuses on how various techniques are applied in a steel production environment to assess steel cleanliness and to measure the effect of process variables on steel cleanliness.