硫酸渣煤基自还原制备铁颗粒试验
|
摘要
硫酸渣是一种富含铁的二次资源。为了保护环境,实现硫酸渣的高效利用,提取其中的铁资源,解决铁矿原料不足的问题,降低生铁成本。以从某厂取回的硫酸渣为原料,无烟煤为还原剂,探讨了硫酸渣煤基自还原制备铁颗粒过程中,配碳量、还原时间及还原温度对还原压块中铁的金属化率的影响。最终确定了最优还原条件,即配碳量nC/nO为1.2、还原温度为1 250℃以及还原时间为12min。此时获得的试验结果最好,在此参数条件下铁的金属化率达96.99%。同时,对硫酸渣的应用前景提出了展望。
Sulfuric acid residues is a kind of significant secondary resource.In order to protect the environment,realize the high efficiency utilization of sulfuric acid residues,and extract the iron resources to solve the inadequate problems of iron ore raw materials and then reduce the cost of pig iron,the sulfuric acid residues taken from a certain plant was used as the raw material,and the anthracite was used as the reducing agent.The effects of carbon ratio,reduction time and reduction temperature on the metallization rate of iron in the reduction briquetting were discussed.Experiment results showed that the optimal reduction conditions were that the carbon ratio was 1.2,the reduction temperature was 1 250℃,and the reduction time was 12 min.Based on these conditions,the metallization rate of iron reached 96.99%.At the same time,the application prospect of sulfuric acid residues was put forward.
Sulfuric acid residues is a kind of significant secondary resource.In order to protect the environment,realize the high efficiency utilization of sulfuric acid residues,and extract the iron resources to solve the inadequate problems of iron ore raw materials and then reduce the cost of pig iron,the sulfuric acid residues taken from a certain plant was used as the raw material,and the anthracite was used as the reducing agent.The effects of carbon ratio,reduction time and reduction temperature on the metallization rate of iron in the reduction briquetting were discussed.Experiment results showed that the optimal reduction conditions were that the carbon ratio was 1.2,the reduction temperature was 1 250℃,and the reduction time was 12 min.Based on these conditions,the metallization rate of iron reached 96.99%.At the same time,the application prospect of sulfuric acid residues was put forward.
引文
[1]李崇.中国硫酸工业现状及“十三五”发展思路[J].硫酸工业,2016(1):1.
[2]左豪恩,温建康,崔兴兰,等.硫酸渣脱硫制备高品质铁精矿研究进展[J].工程科学学报,2018,40(1):1.
[3] HE B,TIAN X,SUN Y,et al.Recovery of iron oxide concentrate from high-sulfur and low-grade pyrite cinder using an innovative beneficiating process[J].Hydrometallurgy,2010,104(2):241.
[4]常苗.硫铁矿烧渣的综合利用探析[J].硫磷设计与粉体工程,2013(3):45.
[5]李平,陈天虎,朱晓,等.磁性硫酸烧渣结构和物性特征及应用潜力[J].地学前缘,2014,21(5):346.
[6] CHUN T,LONG H,DI Z,et al.Preparation of direct reduction sponge iron(DRI)using pyrite cinder containing nonferrous metals[J].High Temperature Materials and Processes,2016,36(10):1.
[7]张智,程攀.竖炉球团配加硫酸渣生产探索[J].现代冶金,2017,45(3):22.
[8]王家伟,李安静,王海峰.硫酸渣加碱焙烧过程中富铁效果研究[J].矿产综合利用,2016(5):88.
[9]李延兵.煅烧参数对硫酸渣化学链燃烧反应特性的影响[J].洁净煤技术,2018,24(1):102.
[10]王雪峰,朱春华,王海军,等.降低成本提高冶金矿山资源综合利用水平[J].中国冶金,2015,25(8):48.
[11]齐渊洪,钱晖,周渝生,等.中国直接还原铁技术发展的现状及方向[J].中国冶金,2013,23(1):9.
[12]闫仲科,郭亚光.硫酸渣煤基直接还原应用基础研究[J].工业加热,2013,42(4):44.
[13]洪陆阔,齐渊洪,孙彩娇,等.钒钛磁铁矿煤基直接还原试验[J].钢铁,2017,52(11):15.
[14]郭亚光,朱荣,吴恩辉,等.煤基处理硫酸渣制备含硫钢原料的实验研究[J].北京科技大学学报,2014,36(增刊1):93.
[2]左豪恩,温建康,崔兴兰,等.硫酸渣脱硫制备高品质铁精矿研究进展[J].工程科学学报,2018,40(1):1.
[3] HE B,TIAN X,SUN Y,et al.Recovery of iron oxide concentrate from high-sulfur and low-grade pyrite cinder using an innovative beneficiating process[J].Hydrometallurgy,2010,104(2):241.
[4]常苗.硫铁矿烧渣的综合利用探析[J].硫磷设计与粉体工程,2013(3):45.
[5]李平,陈天虎,朱晓,等.磁性硫酸烧渣结构和物性特征及应用潜力[J].地学前缘,2014,21(5):346.
[6] CHUN T,LONG H,DI Z,et al.Preparation of direct reduction sponge iron(DRI)using pyrite cinder containing nonferrous metals[J].High Temperature Materials and Processes,2016,36(10):1.
[7]张智,程攀.竖炉球团配加硫酸渣生产探索[J].现代冶金,2017,45(3):22.
[8]王家伟,李安静,王海峰.硫酸渣加碱焙烧过程中富铁效果研究[J].矿产综合利用,2016(5):88.
[9]李延兵.煅烧参数对硫酸渣化学链燃烧反应特性的影响[J].洁净煤技术,2018,24(1):102.
[10]王雪峰,朱春华,王海军,等.降低成本提高冶金矿山资源综合利用水平[J].中国冶金,2015,25(8):48.
[11]齐渊洪,钱晖,周渝生,等.中国直接还原铁技术发展的现状及方向[J].中国冶金,2013,23(1):9.
[12]闫仲科,郭亚光.硫酸渣煤基直接还原应用基础研究[J].工业加热,2013,42(4):44.
[13]洪陆阔,齐渊洪,孙彩娇,等.钒钛磁铁矿煤基直接还原试验[J].钢铁,2017,52(11):15.
[14]郭亚光,朱荣,吴恩辉,等.煤基处理硫酸渣制备含硫钢原料的实验研究[J].北京科技大学学报,2014,36(增刊1):93.