铜渣球团还原-熔分工艺试验研究
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摘要
在实验室条件下使用马弗炉模拟转底炉,在1 400℃下焙烧还原由铜渣、还原煤、石灰石等原料制备的含碳球团,还原熔分生成粒铁和渣,再通过人工挑选的方式实现渣和粒铁的分离。研究了焙烧时间、碱度、助熔剂种类和用量等因素对还原熔分效果的影响,结果表明,在焙烧时间40 min、球团碱度0.42、球团外配助熔剂Ca F_22%时,可获得铁回收率91.71%、TFe品位95.22%、S含量0.37%的高品质粒铁。
In the laboratory test,a muffle furnace was used to simulate the condition of a rotary hearth furnace and carbon-containing pellets prepared with copper slag,reduction coal and limestone was roasted at 1 400℃,yielding granular iron and slag after the process of reduction and melting,which were then separated from each other by hand sorting.Based on the test,effects of roasting time,basicity,types and dosage of each fluxing agent on the reductionmelting process were studied.It is found that pellet with a basicity of 0.42 was roasted for 40 min by adding flux of Ca F_2at an amount of 2%,resulted in a high-quality granular iron grading 95.22%TFe at recovery of 91.71%,with S content at 0.37%.
In the laboratory test,a muffle furnace was used to simulate the condition of a rotary hearth furnace and carbon-containing pellets prepared with copper slag,reduction coal and limestone was roasted at 1 400℃,yielding granular iron and slag after the process of reduction and melting,which were then separated from each other by hand sorting.Based on the test,effects of roasting time,basicity,types and dosage of each fluxing agent on the reductionmelting process were studied.It is found that pellet with a basicity of 0.42 was roasted for 40 min by adding flux of Ca F_2at an amount of 2%,resulted in a high-quality granular iron grading 95.22%TFe at recovery of 91.71%,with S content at 0.37%.
引文
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[9]万新宇,齐渊洪,高建军,等.水淬铜渣还原熔分回收粒铁和铜[J].钢铁研究学报,2016(10):22-29.
[10]马赛,王静松,丁银贵,等.关于含碳球团生产珠铁的硫含量控制试验研究[J].烧结球团,2011(5):38-42.
[11]甘宇栋.转底炉工艺形成珠铁的机理研究[D].唐山:河北联合大学冶金与能源学院,2013.
[2]曹志成,孙体昌,薛逊,等.无烟煤转底炉直接还原铜渣回收铁、锌研究[J].矿冶工程,2017(2):74-78.
[3]李磊,胡建杭,王华.铜渣熔融还原炼铁过程研究[J].过程工程学报,2011(1):65-71.
[4]陈伟鹏,李光卫,赵增武,等.高铁煤泥作还原剂直接还原褐铁矿研究[J].矿冶工程,2017(1):68-72.
[5]杨慧芬,景丽丽,党春阁.铜渣中铁组分的直接还原与磁选回收[J].中国有色金属学报,2011(5):1165-1170.
[6]王敏,薛逊,曹志成,等.转底炉直接还原工艺的应用及发展趋势[J].天津冶金,2013(1):42-46.
[7]孙志杰,魏国,刘占华,等.铜冶炼渣固废资源制备珠铁的研究[J].矿冶工程,2017(5):81-84.
[8]赵凯,宫晓然,李杰,等.直接还原法回收铜渣中铁、铜和锌的热力学[J].环境工程学报,2016,10(5):2638-2646.
[9]万新宇,齐渊洪,高建军,等.水淬铜渣还原熔分回收粒铁和铜[J].钢铁研究学报,2016(10):22-29.
[10]马赛,王静松,丁银贵,等.关于含碳球团生产珠铁的硫含量控制试验研究[J].烧结球团,2011(5):38-42.
[11]甘宇栋.转底炉工艺形成珠铁的机理研究[D].唐山:河北联合大学冶金与能源学院,2013.