Discussion on phase variation characteristics of vanadium slag in low calcified-roasting
GAO Jian1,2,3, FU Zibi1,2
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：The study of phase variation is of great value for deducing and constructing the roasting mechanism of vanadium slag. Starting from the specific phase content, morphology and occurrence of element that were easily neglected in previous phase studies of vanadium slag, the variation characteristics of main phases in low calcified-roasting stage of vanadium slag were analyzed by X-ray diffraction (XRD) and mineral liberation analyzer(MLA).The results showed that the vanadium spinel,fayalite and hedenbergite were gradually oxidized and decomposed with the increase of temperature, and their contents decreased gradually. Meanwhile, the contents of iron oxide, pseudobrookite and manganese-calcium vanadate increased gradually.When the roasting temperature was above 850 ℃,the manganese-iron vanadate was gradually transformed into manganese-calcium vanadate. With the increase of roasting temperature, the vanadium spinel, fayalite and hedenbergite gradually changed from edge oxidation to internal oxidation, and the oxidation products were mainly manganese-calcium vanadate, manganese-iron vanadate, iron oxide, pseudobrookite and vitric matters. At the stage of roasting, the vanadium element mainly migrated from vanadium spinel to other phases such as manganese-calcium vanadate, manganese-iron vanadate and pseudobrookite. The appropriate temperature for low calcified-roasting of vanadium slag was 900 ℃.
[1] 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. [2] 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. [3] 郭昕,王玲,郑康豪,等.钒渣提钒工艺及研究进展[J].中国矿业,2016,25(S1):435-437. GUO Xin,WANG Ling,ZHENG Kanghao,et al.Research progress of extraction technology for vanadium from vanadium slags[J].China Mining Magazine,2016,25(S1):435-437. [4] 付自碧.钒渣空白焙烧清洁提钒工艺探讨[J].钢铁钒钛,2019,40(4):17-22. FU Zibi.Technology research on clean vanadium-extracting from vanadium slag by blank roasting[J].Iron Steel Vanadium Titanium,2019,40(4):17-22. [5] 罗富怀,付念新,张林,等.钒渣钙化焙烧熟料的浸出过程[J].过程工程学报,2018,18(3):600-604. LUO Fuhuai,FU Nianxin,ZHANG Lin,et al.Leaching process of roasting clinker with vanadium slag[J].The Chinese Journal of Process Engineering,2018,18(3):600-604. [6] 高健,钟祥,史志新.焙烧温度对高钙钒渣焙烧关键阶段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 products phases of high-calcium vanadium slag in roasting stage[J].Metallurgical Analysis,2022,42(9):32-39. [7] 陈厚生.钒渣石灰焙烧法提取V2O5工艺现状[J].钢铁钒钛,1992,13(6):1-9. CHEN Housheng.Study on extraction of vanadium pentoxide from roasted vanadium slag with lime[J].Iron Steel Vanadium Titanium,1992,13(6):1-9. [8] 李京,施哲,梁晨,等.低钙化焙烧-碳酸钠浸出提钒试验[J].矿冶,2015,24(5):52-56. LI Jing,SHI Zhe,LIANG Chen,et al.Experiment on extracting vanadium by the method of low calcium roasting-sodium carbonate leaching[J].Mining & Metallurgy,2015,24(5):52-56. [9] 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. [10] 付自碧.钒渣钙化焙烧-酸浸提钒试验研究[J].钢铁钒钛,2014,35(1):1-6. FU Zibi.Experimental research on vanadium extraction by calcified roasting and acid leaching[J].Iron Steel Vanadium Titanium,2014,35(1):1-6. [11] 马家骏,史培阳,刘承军,等.采用钙化焙烧-铵盐浸出工艺从钒渣中浸出钒[J].湿法冶金,2021,40(4):283-287. MA Jiajun,SHI Peiyang,LIU Chengjun,et al.Extraction of vanadium from vanadium slag by the process of calcification roasting-ammonium leaching[J].Hydro-metallurgy of China,2021,40(4):283-287. [12] 付念新,张林,刘武汉,等.钒渣添加石灰石氧化焙烧过程中物相的转化行为[J].过程工程学报,2017,17(2):285-291. FU Nianxin,ZHANG Lin,LIU Wuhan,et al.Behavior of phase transformation in oxidation roasting of vanadium slags with participation of limestone[J].The Chinese Journal of Process Engineering,2017,17(2):285-291. [13] 恩·阿·瓦托林.钒渣的氧化[M].北京:冶金工业出版社,1982. [14] 高健,史志新,钟祥.高钙钒渣焙烧过程中硅酸盐矿物变化特征研究[J].硅酸盐通报,2022,41(5):1734-1740. GAO Jian,SHI Zhixin,ZHONG Xiang.Variation characteristics of silicate minerals during roasting process of high calcium vanadium slag[J].Bulletin of the Chinese Ceramic Society,2022,41(5):1734-1740. [15] 高健,史志新,钟祥.保温时间对高钙钒渣焙烧阶段关键生成物相的影响研究[J].稀有金属与硬质合金,2022,50(5):19-25. GAO Jian,SHI Zhixin,ZHONG Xiang.Study on effects of heat preservation time on key product phases of high-calcium vanadium slag in roasting stage[J].Rare Metals and Cemented Carbides,2022,50(5):19-25.
