Abstract
The role of CaCl2 during the high temperature chloridizing-reduction roasting process was investigated, aiming at acquiring high strength blast furnace burden with high iron grade and low nonferrous metals content. The effects of CaCl2 dosage on pelletizing, preheating and reduction were investigated. The results show that CaCl2 can improve the wet drop strength but reduces the thermostability of pyrite cinder green balls. When the dosage of CaCl2 exceeds 1%, the compressive strength of preheated pellets decreases while the growth of iron oxide particles is improved. Furthermore, the compressive strength of pre-reduced pellets increases but the metallization degree of pre-reduced pellets decreases with CaCl2 additive. The removal tests indicate that Zn can be removed completely without CaCl2 additive, Cu is removed only under the condition with CaCl2 additive and part of Pb must be removed by CaCl2 additive.
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ZHANG Han-quan, LU Man-man, HU Ding-guo. Iron concentration and sulfur reduction on sulphuric acid drag by magnetic roasting-magnetic separation [J]. Journal of Wuhan Institute of Technology, 2012, 34(10): 15–18. (in Chinese)
GIUNTI M, BARONI D, BACCI E. Hazard assessment to workers of trace metal content in pyrite cinders [J]. Bulletin of Environmental Contamination and Toxicology, 2004, 72: 352–357.
LIU Zhao-cheng, ZHENG Ya-jie. Hexagonal hematite platelets synthesized from pyrite cinders by hydrothermal process [J]. Journal of Central South University of Technology, 2011, 18(5): 1377–1382.
KOVKOV I V, ABDRAKHIMOV V Z. Thermomechanical studies of ceramic tile made from technogenic raw materials [J]. Glass and Ceramics, 2011, 68(3/4): 128–130.
ZHENG Y J, LIU Z C. Preparation of monodispersed micaceous iron oxide pigment from pyrite cinders [J]. Powder Technology, 2011, 207: 335–342.
ALP I, DEVECI H, YAZICI E Y, TURK T, SUNGUN Y H. Potential use of pyrite cinders as raw material in cement production: results of industrial scale trial operations [J]. Journal of Hazardous Materials, 2009, 166: 144–149.
BI Wan-li, WU Wen-hong, LI Jing. Experimental research on recovering of iron concentrate from pyrite cinder [J]. Hydrometallurgy of China, 2011, 30(3): 229–231. (in Chinese)
HE Bin-bin, TIAN Xi-ke, SUN Yan, YANG Chao, ZENG Yang-lin, WANG Yan-xin, ZHANG Su-xin, PI Zhen-bang. Recovery of iron oxide concentrate from high-sulfur and low-grade pyrite cinder using an innovative beneficiating process [J]. Hydrometallurgy, 2010, 104(2): 241–246.
LIU Q C, XU Z P, WEI C M, YANG J, WEN J. Recycling of fly ash and industrial waste as sinter ore during metallurgy process [J]. Asian Journal of Chemistry, 2011, 23(8): 3602–3604.
ZHU De-qing, CHEN Dong, PAN Jian, LI Hou-qi. Pretreatment of pyrite cinder before pelletization by high pressure roller grinding [J]. Journal of Iron and Steel Research International, 2009, 16: 345–349.
CHUN T J, ZHU D Q, PAN J. Influence of sulfur content in raw materials on oxidized pellets [J]. Journal of Central South University of Technology, 2011, 18(6): 1924–1929.
ISHIMITSU A, ARAKAWA S, KITAZAWA T, SUGAHARA K. Process of obtaining a granular charge for the blast furnace from a pyrite cinder and iron manufacture dust or powdered iron ore: US, 3482964 [P]. 1969.
JIANG T, ZHANG Y, HUANG Z, YANG Y, LI G. Novel process to recover valuable metals from hydrometallurgical zinc residues [J]. Mineral and Metal Processing, 2006, 23: 214–218.
GONG Zhu-qing, GONG Sheng, ZHOU Bo, CHEN Bai-zhen. A study on techniques of producing sponge iron from pyrite cinder [J]. Mining and Metallurgical Engineering, 2006, 26(1): 45–48. (in Chinese)
ZHU De-qing, CHEN Dong, PAN Jian, CUI Yu, CHUN Tie-jun. “One step” technology to separate copper, zinc, lead form iron in metallurgical slag and pyrite cinder: part 2-pilot test [C]// 2nd International Symposium on High-Temperature Metallurgical Processing. San Diego: Wiley, 2011: 151–160.
QIU Guan-zhou, JIANG Tao, XU Jing-cang, CAI Nu-zuo. Direct reduction of cold-bonded pellets [M]. Changsha: Central South University Press, 2001: 63–64. (in Chinese)
XU Nan-ping. Ferrous metallurgical experimental technology and methods [M]. Beijing: Metallurgical Industry Press, 1995: 122. (in Chinese)
GE Yong, CHANG Chuan-li, YANG Wen-cui, ZHANG Bao-sheng, YUAN Jie, YU Ji-shou. Effect of inorganic salts on surface tension of solutions and properties of concrete [J]. Concrete, 2007(6): 7–9.(in Chinese)
FU Ju-ying, JIANG Tao, ZHU De-qing. Principles of sintering and pelletizing [M]. Changsha: Centreal South University of Technology Press, 1995: 292–297. (in Chinese)
ZHOU Lian-jiang, LE Zhi-qiang. Industry handbook Inorganic salt [M]. Beijing: Chemical Industry Press, 1996: 545. (in Chinese)
NICL S K, ADAMIAK Z P. Role of bentonite in wet pelletizating [J]. Institute of Mining and Metallurgical Sec C, 1978, 82: 32–35.
BARIN I. Thermochemical data of pure substances [M]. New York: VCH Publishers, 1989.
PENG Rong-qiu. Metallurgy of lead and zinc [M]. Beijing: Science Technology Press, 2003: 292, 456. (in Chinese)
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Foundation item: Project(51504155) supported by the National Natural Science Foundation of China; Project(BK20140337) supported by the Basic Research Program of Jiangsu Province, China; Project(SDY2013A13) supported by the Young Teacher Natural Science Fund of Soochow University, China
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Chen, D., Zhu, Dq., Hong, L. et al. Preparation of pre-reduced pellet using pyrite cinder containing nonferrous metals with high temperature chloridizingreduction roasting technology—Effect of CaCl2 additive. J. Cent. South Univ. 22, 4154–4161 (2015). https://doi.org/10.1007/s11771-015-2962-3
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DOI: https://doi.org/10.1007/s11771-015-2962-3