制备铁硫合金消除沉降电炉炉结的方法

Study on the preparation of Fe-S alloy to eliminate the furnace accretions of settling electric furnace

火法炼铜过程中,将铜熔炼过程中产出的熔炼渣和锍的混合熔体送入沉降电炉进行渣锍的澄清分离,该过程不可避免的形成炉结。文中归纳了现有消除炉结的各种方法及其利弊,创新性的提出了用Fe2O3、硫铁矿(主要成分FeS2)和焦炭混合制备铁硫合金并用来消除炉结的新方法。通过Fe-S二元系相图分析了铁硫合金性能,考察了制备过程中制备温度、保温时间和硫含量对铁硫合金密度的影响。结果表明,当硫含量35%(指原子百分比,下同)时,铁硫合金较优的制备温度为1350℃、保温时间为30 min;在较优制备温度和保温时间下,硫含量在32%~41%之间时,制备的铁硫合金能满足消除炉结要求。

Furnace accretions are inevitably formed in the separation of smelting slag and matte,which are produced in the copper smelting by fire,when their melt is settling in the electric furnace.All existing methods of eliminating furnace accretions as well as the advantages and disadvantages of these methods are summarized and a new method of using Fe-S alloy prepared by Fe2O3,pyrite(main component FeS2)and coke to eliminate furnace accretions is also included in this paper.The phase diagram of Fe-S binary system is used to analyze the properties of Fe-S alloy.The effects of preparation temperature,holding time and sulfur content on the density of Fe-S alloy are investigated.The results show that when the sulfur content is 35%(atom percentage,the same below),the best preparation temperature is 1350℃and the best holding time is 30 min;Under the best preparation temperature and holding time,if the sulfur content is between 32%and 41%,then the prepared Fe-S alloy can effectively eliminate furnace accretions.