The total amount of ferrous slag generated in the U.S. is about one-third the amount of iron ore mined, thus ferrous slag can be considered a significant mineral body for processing. Steelmaking slag contains up to 30 wt.% metal of which only the >25mm fraction is commonly recovered. A grinding study was conducted of BOF, EAF, and LMF slags using the Bond Work Index method to determine grindability to 106um. Work Index values obtained were 13.8-24.9 kWh/ST, depending upon the slag type and composition. Steel particles were magnetically recovered from the crushed and ground samples for size-by-size analysis, yielding up to 18 wt.% of the slag weight recovered as magnetic. The recovered material, as characterized by inert gas melting, was found to be 61-96 wt.% metallic.
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机译：美国产生的铁渣总量约为开采的铁矿石的三分之一，因此，铁渣可被视为重要的矿物质加工对象。炼钢炉渣包含高达30 wt。％的金属，通常仅回收> 25mm的馏分。使用Bond Work Index方法对BOF，EAF和LMF炉渣进行了研磨研究，以确定可研磨至106um。根据炉渣类型和成分，获得的工作指数值为13.8-24.9 kWh / ST。从粉碎的和磨碎的样品中以磁性方式回收钢颗粒，以便按尺寸进行分析，以磁性形式回收的渣量最高可达18％。以惰性气体熔化为特征的回收材料被发现是61-96wt。％的金属。
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