Ladle furnaces at Evraz Nizhnii Tagil Iron and Steel Works OJSC produce over 90,000 metric tons of slag per year. As this slag cools, it turns into a fine-grained powder; if the powder cannot be sold, it is temporarily stored until it can be disposed of [1]. We have considered producing easily used flux sinter from the slag generated during ladle processing of steel (hereinafter, ladle-furnace slag or LFS). Since LFS still contains a large number of metallic inclusions, it cannot be included in sinter fed into a hammer mill via the enclosed lime feed trough. LFS was therefore added to the iron flux charge along with the steel smelting fluxes in a duplex and mono process (steel converter slag (SCS) and vanadiumbearing converter slag (VCS)); the fluxes are then crushed in a jaw crusher. A successful test of the use of LFS in sinter was performed, the charge was free of raw limestone, coke consumption was lower, sinter machinery production capacity was higher, and the weight/sample ratio of the sintered product was improved. Since SCS and VCS contain up to 3.0% V2O5, this provided an opportunity to increase vanadium use during the blast-furnace sintering process by more than 100 metric tons of vanadium per month.

中文翻译：

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Evraz Nizhnii Tagil 钢铁厂 OJSC 的钢包炉渣再处理

Evraz Nizhnii Tagil 钢铁厂 OJSC 的钢包炉每年生产超过 90,000 公吨的炉渣。随着炉渣冷却，它变成细粒粉末；如果粉末无法出售，则将其暂时储存，直到可以处理为止 [1]。我们已经考虑用钢包加工过程中产生的炉渣（以下称为钢包炉渣或 LFS）生产易于使用的熔剂烧结体。由于 LFS 仍含有大量金属夹杂物，因此无法将其包含在通过封闭式石灰进料槽送入锤磨机的烧结矿中。因此，在双相和单一工艺（转炉渣 (SCS) 和含钒转炉渣 (VCS)）中，将 LFS 与炼钢熔剂一起添加到铁熔剂装料中；然后将助熔剂在颚式破碎机中破碎。对 LFS 在烧结中的使用进行了成功的测试，炉料不含生石灰石，焦炭消耗量更低，烧结机械产能更高，提高了烧结产品的重样比。由于 SCS 和 VCS 含有高达 3.0% 的 V2O5，这为在高炉烧结过程中每月增加 100 多公吨钒的使用提供了机会。