Taking calcium borate as additive, the effect of additives on the precipitation of copper in copper slag was investigated. Combining the viscosity test of copper slag and the Fourier transform infrared spectroscopy (FT-IR) characterization of copper slag, the mechanism of the influence of calcium borate on copper slag was discussed. At the same time, the influence of additives on the liquids temperature of copper slag was calculated by thermodynamic software FactSage. The results showed that with the increase of additive content, the settlement of copper in copper slag was gradually enhanced. When the content of additives in slag increased from 0 to 6wt%, the copper content of the slag at the bottom of the sample increased from 4.10wt% to 6.85wt%. This is attributed to the fact that additives can effectively reduce the viscosity of copper slag and increase fluidity of slag. The viscosity of copper slag gradually decreased as the additive content increased, but the effect of the additive on the viscosity of the copper slag flat as the temperature increased. The complex silicate structure of copper slag simplified with the increase of additive content in slag, and the additive reduced the viscosity of the copper slag by destroying the complex silicate structure of the copper slag. In addition, the liquidus temperature of copper slag decreased with the increase of additive content. The additive also reduced the viscosity of the copper slag by reducing the amount of solid particles in the slag.
Yu SHI Bo LI Guangping DAI Shiwei ZHOU Hua WANG Yonggang WEI
. Effect of calcium borate on sedimentation of copper inclusions in copper slag[J]. The Chinese Journal of Process Engineering, 2019
, 19(3)
: 553
-559
.
DOI: 10.12034/j.issn.1009-606X.218271
[1] Nadirov R K, Syzdykova L I, Zhussupova A K, et al. Recovery of value metals from copper smelter slag by ammonium chloride treatment [J]. International Journal of Mineral Processing, 2013, 124(22):145-149.
[2] M. Deniz TURAN, Z. Abidin SARI, JanD.MILLER. Leaching of blended copper slag in microwave oven [J]. The Chinese Journal of Non ferrous Metals，2017, 27(6):1404-1410.
[3] 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, 21(5):1165-1170.
Yang Huifen, Jing Lili, Dang Chunge. Iron recovery from copper-slag with lignite-based direct reduction followed by magnetic separation [J]. The Chinese Journal of Non ferrous Metals，2011, 21(5):1165-1170.
[4] 朱祖泽，贺家齐. 现代铜冶金学 [M]. 北京：科学出版社，2003: 424-425
[5] Suh I K, Waseda Y, Yazawa A. Some Interesting Aspects of Non-ferrous Metallurgical Slags [J]. High Temperature Materials & Processes, 1988, 8(1):65-88.
[6] Sridhar R, Toguri J M, Simeonov S. Copper losses and thermodynamic considerations in copper smelting [J]. Metallurgical & Materials Transactions B, 1997, 28(2):191-200.
[7] Wilde E D, Bellemans I, Campforts M, et al. Study of the Effect of Spinel Composition on Metallic Copper Losses in Slags [J]. Journal of Sustainable Metallurgy, 2016:1-12.
[8] 常化强, 张廷安, 牛丽萍,等. 铜渣贫化技术的研究进展 [C]// 2013.
Chang H Q, Zhang T A , Niu L P, et al. Research progress of copper slag dilution technology. [C] // 2013.
[9] Yucel O, Sahin F C, Sirin B, et al. Reduction study of copper slag in a DC arc furnace [J]. Scandinavian Journal of Metallurgy, 1999, 28(3):93-99
[10] Rusen A, Geveci A, Topkaya Y A, et al. Effects of Some Additives on Copper Losses to Matte Smelting Slag [J]. JOM, 2016, 68(9):2323-2331.
[11] Talapaneni T, Yedla N, Pal S, et al. Experimental and Theoretical Studies on the Viscosity–Structure Correlation for High Alumina-Silicate Melts [J]. Metallurgical & Materials Transactions B, 2017, 48(3):1450-1462.
[12] 刘著, 唐萍, 文光华，等. B2O3在稀土钢连铸保护渣中作用机制的研究 [J]. 稀有金属, 2006, 30(4):457-461.
Liu Z , Tang P , Wen G H, et al. Research on Mechanism of B2O3 in Mold Powder during Continuous Casting of Rare Earth Steel [J].Chinese Journal of Rare Metals, 2006, 30(4):457-461.
[13] 王宏明, 李桂荣, 徐明喜，等. 改质剂对LATS精炼钢包渣粘度的影响 [J]. 过程工程学报, 2006, 6(2):227-230.
Wang H M, Li G R, Xu H M, et al. Effect of Additives on Viscosity of LATS Refining Ladle Slag [J]. The Chinese Journal of Process Engineering, 2006, 6(2):227-230.
[14] Park H, Park J Y, Kim G H, et al. Effect of TiO2 on the Viscosity and Slag Structure in Blast Furnace Type Slags [J]. Steel Research International, 2012, 83(2):150-156.
[15] Zhang Z, Xie B, Zhou W, et al. Structural Characterization of FeO–SiO2–V2O3 Slags Using Molecular Dynamics Simulations and FT-IR Spectroscopy [J]. Isij International, 2016, 56(5).
[16] Park J H, Kim H, Dong J M. Novel Approach to Link between Viscosity and Structure of Silicate Melts via, Darken’s Excess Stability Function: Focus on the Amphoteric Behavior of Alumina [J]. Metallurgical & Materials Transactions B, 2008, 39(1):150-153.
[17] Wang H M, Li G R, Dai Q X, et al. CAS-OB refining: slag modification with B2O3-CaO and CaF2-CaO [J]. Ironmaking & Steelmaking, 2013, 34(4):350-353.
[18] Wu L, Ek M, Song M, et al. The Effect of Solid Particles on Liquid Viscosity [J]. Steel Research International, 2011, 82(4):388-397.
[19] Roscoe R. The viscosity of suspensions of rigid spheres [J]. British Journal of Applied Physics, 2002, 3(8):267.
[20] Ren S, Zhang J, Wu L, et al. Influence of B2O3 on Viscosity of High Ti-bearing Blast Furnace Slag [J]. Isij International, 2012, 52(6):984-991.
[21] Rusen A, Derin B, Geveci A, et al. Investigation of Copper Losses to Synthetic Slag at Different Oxygen Partial Pressures in the Presence of Colemanite[J]. JOM, 2016, 68(9):2316-2322.
