Discussion on effects of roasting temperature on key product phases of high-calcium vanadium slag in roasting stage
GAO Jian1,2,3, ZHONG Xiang1,2,3, SHI Zhixin1,2,3
1. State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization,Panzhihua 617000,China; 2. Pangang Group Research Institute Co., Ltd., Panzhihua 617000,China; 3. Sichuan Panyan Testing Technology Co., Ltd., Panzhihua 617000,China
Abstract：Temperature is one of the key factors affecting the growth of mineral crystals. It is of positive significance to investigate the influence law of roasting temperature change on the main products of vanadium slag in roasting stage and to better understand the roasting process of vanadium slag. The change characteristics of key product phases of high-calcium vanadium slag in roasting stage, including the particle size, morphology, and micro-zone composition change, were investigated by scanning electron microscope and energy dispersive spectrometer. The results showed that the crystal grain size of iron oxide and pseudobrookite increased gradually with the increase of roasting temperature. With the increase of temperature, iron oxide gradually transformed from iron oxide edge which was distributed on the edge of vanadium spinel into regular round granular crystal. Meanwhile, pseudobrookite gradually transformed from nanometer crystal precipitated in vanadium spinel into regular tabular crystal. Calcium manganese vanadate gradually transformed from ring-like shape which was distributed on the edge of vanadium spinel into amorphous shape wrapping iron oxide and pseudobrookite. With the increase of temperature, the contents of Si, Ca, V and other elements in iron oxide decreased gradually in general, and the contents of Cr and Mn increased gradually in general. The contents of Mg, Al, Si, Ca, V and Mn in pseudobrookite gradually decreased with the rising temperature before 800 ℃, and the content of these elements increased slightly when the temperature increased to 850 ℃. With the rise of temperature, the content of Ca in calcium manganese vanadate gradually increased, and the content of Mn gradually decreased. Calcium manganese vanadate was gradually transformed into calcium vanadate.
高健, 钟祥, 史志新. 焙烧温度对高钙钒渣焙烧阶段关键生成物相的影响探讨[J]. 冶金分析, 2022, 42(9): 32-39.
GAO Jian, ZHONG Xiang, SHI Zhixin. Discussion on effects of roasting temperature on key product phases of high-calcium vanadium slag in roasting stage. , 2022, 42(9): 32-39.
[1] 任学佑.金属钒的应用现状及市场前景[J].世界有色金属,2001(2):34-36. REN Xueyou.Application status and market prospects of metal vanadium[J].World Nonferrous Metals,2001(2):34-36. [2] 李兰杰,陈东辉,白瑞国,等.钒渣中钒铬提取技术研究进展[J].矿产综合利用,2013(2):7-10. LI Lanjie,CHEN Donghui,BAI Ruiguo,et al.Research progress of extraction technology for vanadium & chromium from vanadium slag[J].Multipurpose Utilization of Mineral Resources,2013(2):7-10. [3] 郑诗礼,杜浩,王少娜,等.亚熔盐法钒渣高效清洁提钒技术[J].钢铁钒钛,2012,33(1):15-18. ZHENG Shili,DU Hao,WANG Shaona,et al.Efficient and cleaner technology of vanadium extraction from vanadium slag by sub-molten salt method[J].Iron Steel Vanadium Titanium,2012,33(1):15-18. [4] WANG Z H,ZHENG S L,WANG S N,et al.Research and prospect on extraction of vanadium from vanadium slag by liquid oxidation on tachnologies[J].Transactions of Nonferrous Metals Society of China,2014,24:1273-1278. [5] 廖世明,柏谈论.国外钒冶金[M].北京:冶金工业出版社,1985. [6] 王俊,孙朝晖,苏毅,等.高钙高磷钒渣焙烧浸出的研究[J].稀有金属,2015,39(11):1038-1042. WANG Jun,SUN Zhaohui,SU Yi,et al.Roasting and leaching of high calcium and high phosphorus vanadium slag[J].Chinese Journal of Rare Metals,2015,39(11):1038-1042. [7] 范鹤林,陈登福,徐松,等.高钙钒比钒渣钠化焙烧熟料浸出条件研究[J].过程工程学报,2013,13(6):958-962. FAN Helin,CHEN Dengfu,XU Song,et al.Research on leaching conditions of sodium roasted vanadium slag with high Ca/V ratio[J].The Chinese Journal of Process Engineering,2013,13(6):958-962. [8] 李新生.高钙低品位钒渣焙烧-浸出反应过程机理研究[D].重庆:重庆大学,2011. [9] 李鸿乂,王宇,谢兵,等.一种碳酸铵浸出钒渣熟料提钒的方法:中国,201210066735.5[P].2012-07-11. [10] 付自碧,孙朝晖,王彬彬,等.一种制备钒氧化物的方法:中国,201310111092.6[P].2013-04-01. [11] 李宏,王艳南,宋文臣.熔融态高钙高磷钒渣氧化钠化-水浸提钒[J].重庆大学学报,2015,38(2):138-141. LI Hong,WANG Yannan,SONG Wenchen.Vanadium extraction from molten vanadium slag with high contents of Ca and P by direct oxidation and adding Na2CO3 and water leaching method[J].Journal of Chongqing University,2015,38(2):138-141. [12] 张菊花,张伟,杨勇霞,等.钒渣钙化焙烧的影响因素及焙烧氧化动力学[J].东北大学学报(自然科学版),2014,35(6):831-835. ZHANG Juhua,ZHANG Wei,YANG Yongxia,et al.Influencing factors of vanadium slag roasting with calcium and oxidation kinetics for roasting process[J].Journal of Northeastern University(Natural Science),2014,35(6):831-835. [13] 尹丹凤,彭毅,孙朝晖,等.攀钢钒渣钙化焙烧影响因素研究及过程热分析[J].金属矿山,2012(4):91-93. YIN Danfeng,PENG Yi,SUN Zhaohui,et al.Influencing factors of calcified roasting and thermal analysis to the process of vanadium slag produced from Pangang[J].Metal Mine,2012(4):91-93. [14] 恩·阿·瓦托林.钒渣的氧化[M].北京:冶金工业出版社,1982. [15] 孟利鹏,王少娜,杜浩,等.钒渣焙烧-碱浸提钒工艺焙烧过程机理[J].过程工程学报,2016,16(3):445-451. MENG Lipeng,WANG Shaona,DU Hao,et al.Process mechanism of vanadium-containing slag roasting and alkali leaching[J].The Chinese Journal of Process Engineering,2016,16(3):445-451. [16] 史志新,刘锦燕.钒渣焙烧过程中物相的矿物学特征探讨[J].冶金分析,2014,34(7):12-17. SHI Zhixin,LIU Jinyan.Discussion on the mineralogical characteristics of phase in the process of vanadium slag roasting[J].Metallurgical Analysis,2014,34(7):12-17.
