A novel process to upgrade the copper slag by direct reduction-magnetic separation with the addition of Na2CO3 and CaO

被引：98

作者：

Li, Siwei ^{[1
]}

Pan, Jian ^{[1
]}

Zhu, Deqing ^{[1
]}

Guo, Zhengqi ^{[1
]}

Xu, Jiwei ^{[1
]}

Chou, Jianlei ^{[1
]}

机构：

[1] Cent S Univ, Sch Minerals Proc & Bioengn, Changsha 410083, Hunan, Peoples R China

来源：

POWDER TECHNOLOGY | 2019年 / 347卷

基金：

中国国家自然科学基金;

关键词：

Copper slag; Direct reduction; Wet magnetic separation; Na2CO3; CaO;

D O I：

10.1016/j.powtec.2019.02.046

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

An innovative technology for direct reduction-magnetic separation with the addition of Na2CO3 and CaO was studied to upgrade copper slag assaying 40.33% Fe-total and 0.65% Cu. It is difficult to recover iron and copper from the slag by direct reduction since the iron mainly occurs in fayalite and the copper exists in copper sulfide. Additives such as Na2CO3 and CaO has been proven to be capable of reinforcing the reduction of refractory iron ore in many papers. In this study, the effect of Na(2)CO(3 )dosage and binary basicity (CaO/SiO2) on the coal-based reduction of copper slag was investigated. The results show that the addition of CaO at 0.5 basicity and 8% sodium carbonate, the recovery of the iron and copper can be significantly improved to 94.3% and 86.5%, respectively. Meanwhile, the iron and copper content of magnetic concentrate are maintained at 90.5% and 1.2%, respectively, which can be used as burden for smelting of weathering steel, and the nonmagnetic tailings obtained in this process can be applied as raw materials in cement and industry, and the dust collected from the direct reduction process contains 50.65% Zn and 8.56% Pb at a recovery of 99.16% and 91.89%, and can be used as feed for extraction of Zn and Pb. (C) 2019 Elsevier B.V. All rights reserved.

引用

页码：159 / 169

页数：11

共 27 条

[11] A physico-chemical separation process for upgrading iron from waste copper slag [J].

Kim, Byung-Su ;

Jo, Seul-Ki ;

Shin, Doyun ;

Lee, Jae-Chun ;

Jeong, Soo-Bock .

INTERNATIONAL JOURNAL OF MINERAL PROCESSING, 2013, 124 :124-127

[12]

Kun M., 1974, YUNAN METALL, V7, P56

[13] Leaching of copper and zinc from copper converter slag flotation tailings using H2SO4 and biologically generated Fe2(SO4)3 [J].

Muravyov, Maxim I. ;

Fomchenko, Natalya V. ;

Usoltsev, Alexey V. ;

Vasilyev, Evgeniy A. ;

Kondrat'eva, Tamara F. .

HYDROMETALLURGY, 2012, 119 :40-46

[14]

Qin S.C., 2016, CHIN J INORG ANAL CH, V6, P57

[15] Flotation of copper sulphide from copper smelter slag using multiple collectors and their mixtures [J].

Roy, Subrata ;

Datta, Amlan ;

Rehani, Sandeep .

INTERNATIONAL JOURNAL OF MINERAL PROCESSING, 2015, 143 :43-49

[16]

Sarfo P., 2017, WASTE MANAGE, P70

[17] Recovery of copper from reverberatory furnace slag by flotation [J].

Sarrafi, A ;

Rahmati, B ;

Hassani, HR ;

Shirazi, HHA .

MINERALS ENGINEERING, 2004, 17 (03) :457-459

[18] An overview of recovery of metals from slags [J].

Shen, HT ;

Forssberg, E .

WASTE MANAGEMENT, 2003, 23 (10) :933-949

[19] Utilization of copper slag in cement and concrete [J].

Shi, Caijun ;

Meyer, Christian ;

Behnood, Ali .

RESOURCES CONSERVATION AND RECYCLING, 2008, 52 (10) :1115-1120

[20] RECOVERY OF COPPER FROM COPPER SLAG AND COPPER SLAG FLOTATION TAILINGS BY OXIDATIVE LEACHING [J].

Urosevic, Daniela M. ;

Dimitrijevic, Mile D. ;

Jankovic, Zoran D. ;

Antic, Dejan V. .

PHYSICOCHEMICAL PROBLEMS OF MINERAL PROCESSING, 2015, 51 (01) :73-82

← 1 2 3 →