火法铜渣改质还原提铁试验研究
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摘要
为有效回收铜渣中有价金属铁,模拟链篦机-回转窑工艺对火法铜渣进行了提铁试验研究。结果表明,含铁量为40.2%的铜渣,配加2%的B型添加剂,成球性能良好,且生球指标在碱度适宜条件下优良;采用模拟链篦机-回转窑工艺进行造球、熔炼试验,在碱度1.2、配碳量为理论碳当量的1.5倍、1 450℃下熔炼50 min,可以获得还原率79.7%、铁品位90.6%的二次铁资源。
In order to effectively recover the valuable metallic iron from copper slag, an experiment was conducted for iron recovery from pyrometallurgical copper slag by a simulated grate-rotary kiln technique. The results showed that the copper slag with 40.2% Fe content presented good balling characteristics after an addition of 2% B-type additive, and under a proper alkalinity condition, the obtained green pellet showed better performance. The experiment on pelletization and smelting with the simulated grate-rotary kiln process, resulted in a secondary resource grading 90.6% Fe after smelting at 1 450 ℃ for 50 min, with alkalinity at 1.2 and carbon proportion 1.5 times as much as carbon equivalent, showing reduction rate reaching 79.7%.
In order to effectively recover the valuable metallic iron from copper slag, an experiment was conducted for iron recovery from pyrometallurgical copper slag by a simulated grate-rotary kiln technique. The results showed that the copper slag with 40.2% Fe content presented good balling characteristics after an addition of 2% B-type additive, and under a proper alkalinity condition, the obtained green pellet showed better performance. The experiment on pelletization and smelting with the simulated grate-rotary kiln process, resulted in a secondary resource grading 90.6% Fe after smelting at 1 450 ℃ for 50 min, with alkalinity at 1.2 and carbon proportion 1.5 times as much as carbon equivalent, showing reduction rate reaching 79.7%.
引文
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[11]孙志杰,魏国,刘占华,等.铜渣球团还原-熔分工艺试验研究[J].矿冶工程,2018,38(2):103-106.
[12]Zhihong Yang,Qiao Lin,Jixiang Xia,et al.Preparation and crystallization of glass-ceramics derived from iron-rich copper slag[J].Journal of Alloys and Compounds,2013,574:354-360.
[13]许冬,春铁军,陈锦安.铜渣高温快速还原焙烧-磁选回收铁的研究[J].矿冶工程,2017,37(1):89-95.
[14]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,2017,37(2):74-78.
[15]曹洪杨,付念新,张力,等.铜冶炼熔渣中铁组分的迁移与析出行为[J].过程工程学报,2009,9(2):284-288.
[2]Bipra Gorai,Jana R K,Premchand.Characteristics and utilization of copper slag a review[J].Resources,Conservation and Recycling,2003,39(4):299-313.
[3]魏明安.铜转炉渣选矿回收技术研究[J].矿冶,2004(1):38-41.
[4]张林楠,王明玉,隋智通.铜渣的处理与资源化[J].矿产资源综合利用,2005(1):22-27.
[5]汪泰,叶小璐.从铜渣中综合回收铜、银的浮选试验研究[J].矿冶工程,2017,37(1):39-41.
[6]杨椿,余洪.从铜冶炼渣中回收铁的试验研究[J].矿产综合利用,2014(5):55-58.
[7]Byung-Su Kim,Seul-Ki Jo,Doyun Shin,et al.A physic-chemical separation process for upgrading iron from waste copper slag[J].International Journal of Mineral Peocessing,2013,124:124-127.
[8]韩伟,秦庆伟.从炼钢炉渣中提取铜铁的研究[J].矿冶,2009,18(2):9-12.
[9]Busolic D,Parada F,Parra R,et al.Recovery of iron from copper flash smelting slags[J].Mineral Processing and Extractive Metallurgy,2011,120(1):32-36.
[10]孙志杰,魏国,刘占华,等.铜冶炼渣固废资源制备铁珠的研究[J].矿冶工程,2017,37(5):81-84.
[11]孙志杰,魏国,刘占华,等.铜渣球团还原-熔分工艺试验研究[J].矿冶工程,2018,38(2):103-106.
[12]Zhihong Yang,Qiao Lin,Jixiang Xia,et al.Preparation and crystallization of glass-ceramics derived from iron-rich copper slag[J].Journal of Alloys and Compounds,2013,574:354-360.
[13]许冬,春铁军,陈锦安.铜渣高温快速还原焙烧-磁选回收铁的研究[J].矿冶工程,2017,37(1):89-95.
[14]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,2017,37(2):74-78.
[15]曹洪杨,付念新,张力,等.铜冶炼熔渣中铁组分的迁移与析出行为[J].过程工程学报,2009,9(2):284-288.