Iron Recovery from Tailings of the Smelting Slag after Copper Flotation with Magnetic Separation-reverse Flotation
-
摘要:
为了回收某铜冶炼渣中的铁, 在工艺矿物学研究基础上, 进行了磨矿—弱磁选—反浮选技术研究。研究结果表明, 样品中Fe含量高达47.14%, 主要赋存于磁铁矿和含铁硅酸盐中, 分布率分别为53.01%、44.38%。在磨矿细度-0.030 mm占95.31%时, 采用弱磁选—反浮选工艺, 可获得产率35.51%、TFe品位62.71%、铁回收率47.03%的铁精矿; 尾矿可作为水泥铁质调整料销售。最终实现铜渣中铁金属的综合回收及无尾排放。
Abstract:In order to recover iron from tailings of the smelting slag after copper flotation, the separation process of grinding- low magnetic separation-reverse flotation was carried out based on the process mineralogy research results. The results showed that the iron content in the sample was as high as 47.14%. The distribution rate of iron in the magnetite form and in the iron-containing silicate form were 53.01% and 44.38%, respectively. When the grinding fineness was 95.31%(-0.030 mm) and the the separation process of grinding- low magnetic separation-reverse flotation was carried out, the iron concentrate was obtained with yield of 35.51%, TFe grade of 62.71% and iron recovery of 47.03%. Tailings can be sold as iron conditioner for cement industry. Finally, the comprehensive recovery and tailless discharge of iron in the smelting slag would be realized.
-
Key words:
- copper smelting slag /
- beneficiation /
- magnetic separation /
- reverse flotation /
- comprehensive recovery
-
-
表 1 试样化学多元素分析结果
Table 1. Chemical multielement analysis of the sample
/% 组分 Fe FeO Fe2O3 Cu Pb Zn SiO2 Al2O3 含量 47.14 38.13 25.04 0.30 0.47 1.89 23.30 3.82 组分 CaO MgO K2O Na2O As S P 含量 2.63 1.14 0.83 0.31 0.052 0.23 0.06 
下载: 导出CSV
表 2 试样铁物相分析结果
Table 2. Iron phase analysis results of the sample
/% 铁相 含量 分布率 金属铁 0.22 0.47 磁铁矿中铁 24.99 53.01 赤褐铁矿中铁 0.84 1.78 硫化物中铁 0.10 0.21 碳酸盐中铁 0.07 0.15 硅酸盐中铁 20.92 44.38 合计 47.14 100.00
下载: 导出CSV
表 3 试样中主要矿物含量分析结果
Table 3. Main mineral content in the sample
/% 矿物 磁铁矿 金属铁 赤(褐)铁矿 金属铜 斑铜矿 辉铜矿 方黄铜矿 赤铜铁矿 含量 36.35 0.22 1.20 0.01 0.19 0.09 0.08 0.11 矿物 砷铜矿 金属铅+方铅矿 金属锌+闪锌矿 铁橄榄石 玻璃体 石英 其他 含量 0.01 0.02 0.03 34.73 25.92 0.89 0.15
下载: 导出CSV
表 4 铜尾渣直接弱磁选场强试验结果
Table 4. Results of the direct low intensity magnetic separation of copper tailings
磁选场强 产品名称 产率/% TFe品位/% 铁回收率/% 粗选：0.18 T
精选：0.12 T精矿 53.65 55.90 63.73 中矿 2.33 34.12 1.69 尾矿 44.02 36.97 34.58 给矿 100.00 47.06 100.00 粗选：0.20T
精选：0.18 T精矿 55.88 55.83 65.89 中矿 2.40 33.40 1.69 尾矿 41.72 36.79 32.42 给矿 100.00 47.35 100.00 粗选：0.30T
精选：0.20 T精矿 55.97 55.64 66.05 中矿 2.51 33.61 1.79 尾矿 41.52 36.52 32.16 给矿 100.00 47.15 100.00
下载: 导出CSV
表 5 弱磁粗精矿中磁铁矿解离度分析结果
Table 5. Liberation analysis of magnetite in the coarse concentration after low intensity magnetic separation
/% 单体 连生体 ＞3/4 3/4~1/2 1/2~1/4 ＜1/4 57.6 21.3 12.7 6.0 2.4
下载: 导出CSV
表 6 二段弱磁选场强试验结果
Table 6. Results of two stage low magnetic field strength
磁选场强 产品名称 产率/% TFe品位/% 铁回收率/% 粗选：0.12 T
精选：0.10 T精矿 87.06 59.90 92.20 中矿 1.33 35.12 0.83 尾矿 11.61 33.97 6.97 给矿 100.00 56.56 100.00 粗选：0.15 T
精选：0.12 T精矿 88.01 59.84 93.03 中矿 1.53 34.53 0.93 尾矿 10.46 32.70 6.04 给矿 100.00 56.61 100.00 粗选：0.20 T
精选：0.18 T精矿 88.23 59.79 93.21 中矿 1.87 33.48 1.11 尾矿 9.90 32.52 5.68 给矿 100.00 56.60 100.00
下载: 导出CSV
表 7 铁精矿化学多元素分析结果
Table 7. Chemical multielement analysis of the iron concentrate
/% 组分 TFe FeO SiO2 Al2O3 CaO MgO MnO 含量 63.08 33.64 4.40 2.68 0.50 0.46 0.060 组分 K2O Na2O Cu Au/g/t Ag/g/t S P 含量 0.14 0.067 0.19 0.30 7.89 0.083 0.014
下载: 导出CSV
表 8 尾矿化学多元素分析结果
Table 8. Chemical multielement analysis of the tailings
/% 组分 TFe FeO SiO2 Al2O3 CaO MgO MnO 含量 39.78 42.65 32.79 3.02 3.41 1.72 0.12 组分 K2O Na2O Cu Au Ag S P 含量 0.91 0.32 0.52 0.59 7.64 0.27 0.084 注：Au、Ag单位为g/t。
下载: 导出CSV
-
[1] 邱廷省, 周丽萍, 李国栋. 铜冶炼渣直接还原焙烧-磁选回收铜, 铁试验研究[J]. 金属矿山, 2020(9): 6. https://www.cnki.com.cn/Article/CJFDTOTAL-JSKS202009030.htm
QIU T S, ZHOU L P, LI G D. Experimental of copper and iron recovery from copper smelting slag by direct reduction roasting and magnetic separation[J]. METAL MINE, 2020(9): 6. https://www.cnki.com.cn/Article/CJFDTOTAL-JSKS202009030.htm
[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, 37(2): 74-78. doi: 10.3969/j.issn.0253-6099.2017.02.019
CAO Z C, SUN T C, XUE X, et al. Recovery of iron and zinc from copper slag by rotary hearth furnace with anthracite as reductant[J]. Mining and Metallurgical Engineering, 2017, 37(2): 74-78. doi: 10.3969/j.issn.0253-6099.2017.02.019
[3] 代献仁, 林小凤, 袁启东, 等. 某铜冶炼渣中回收铜铁试验研究[J]. 冶金矿山与冶金设备, 2021, 37(7): 116-119. https://www.cnki.com.cn/Article/CJFDTOTAL-KYKB202107030.htm
DAI X R, LIN X F, YUAN Q D, et al. Experimental study on recovery of copper and iron from copper smelting slag[J]. Modern Mining, 2021, 37(7): 116-119. https://www.cnki.com.cn/Article/CJFDTOTAL-KYKB202107030.htm
[4] 刘先阳, 李杰, 张琳, 等. 铜渣深度还原回收铁技术进展[J]. 现代化工, 2019, 39(3): 31-34. https://www.cnki.com.cn/Article/CJFDTOTAL-XDHG201903007.htm
LIU X Y, LI J, ZHANG L, et al. Technical progress in recovering iron from copper slag by deep reduction[J]. Modern Chemical Industry, 2019, 39(3): 31-34. https://www.cnki.com.cn/Article/CJFDTOTAL-XDHG201903007.htm
[5] 刘宏图, 曹亦俊, 范桂侠. 铜冶炼渣综合回收利用进展[J]. 矿产保护与利用, 2021, 41(3): 34-42. http://kcbh.cbpt.cnki.net/WKD/WebPublication/paperDigest.aspx?paperID=b07e2498-82ad-45a1-b82b-06813bd18f39
LIU H T, CAO Y J, FAN G X. Progress in comprehensive recovery and utilization of copper smelting slag[J]. Conservation and Utilization of Mineral Resources, 2021, 41(3): 34-42. http://kcbh.cbpt.cnki.net/WKD/WebPublication/paperDigest.aspx?paperID=b07e2498-82ad-45a1-b82b-06813bd18f39
[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. https://www.cnki.com.cn/Article/CJFDTOTAL-KCZL201405014.htm
YANG C, YU H. Experimental study of recovery of iron from copper smelting slag[J]. Multipurpose Utilization of Mineral Resources. 2014(5): 55-58. https://www.cnki.com.cn/Article/CJFDTOTAL-KCZL201405014.htm
[7] 周中元. 铜冶炼渣综合回收研究[J]. 低碳世界, 2015(19): 153-154. https://www.cnki.com.cn/Article/CJFDTOTAL-KCBH202103005.htm
ZHOU Z Y. Comprehensive recovery of copper smelting slag[J]. Low Carbon World, 2015(19): 153-154. https://www.cnki.com.cn/Article/CJFDTOTAL-KCBH202103005.htm
[8] 朱茂兰, 熊家春, 胡志彪, 等. 铜冶炼渣选铜尾矿还原焙烧-磁选回收铁工艺研究[J]. 有色金属(冶炼部分), 2016(7): 13-16. https://www.cnki.com.cn/Article/CJFDTOTAL-METE201607004.htm
ZHU M L, XIONG J C, HU Z B, et al. Iron recovery from copper tailings of copper smelting slag with reduction roasting and magnetic separation[J]. Nonferrous Metals (extractive metallurgy), 2016(7): 13-16. https://www.cnki.com.cn/Article/CJFDTOTAL-METE201607004.htm
-
图(3)
表(8)
计量
- 文章访问数: 600
- PDF下载数: 6
- 施引文献: 0