摘要
通过对原料进行XRF、XRD、SEM的分析检测,XRF确定原料中主要组成元素Fe、Mn、Ca,含量大约为23.41%、7.166%、15.22%;XRD表明含量较高的铁化合物晶体和锰化合物晶体主要为Fe_2O_3、NaMn(Mn,Fe)_2(PO_4)_3;SEM表明钨冶炼渣中有结晶物质吸附在大颗粒表面,颗粒形貌、大小相差较大.选择硫酸作为钨冶炼渣的浸出剂,选择性浸出铁、锰,钙元素富集留滤渣中,10 g钨冶炼渣中锰、铁含量的浸出量大约为0.58 g和2.1 g左右.考察了反应温度、固液比、硫酸质量分数和反应时间对铁、锰浸出率的影响,通过正交实验表得到较优工艺条件:反应温度80℃、固液比为1∶6(g/g)、质量分数为25%(g/g)与反应时间为90 min.浸出次数为1次.浸出液循环浸出次数1次,可以使铁、锰的浓度提高大约50%和38%.浸出过程动力学计算较符合通过产物层的扩散为控制步骤,其中铁浸出速率较快.
The analysis results of raw materials by XRF, XRD and SEM show that： the main constituent e lements of Fe, Mn, and Ca were determined to be approximately 23.41 %, 7.166 %, and 15.22 %; the higher content of iron compound crystals and manganese compound crystals are mainly Fe2O3 and NaMn（Mn,Fe）2（PO4）3;in the tungsten smelting slag, crystalline substances are adsorbed on the surface of large particles. The morphology and size of the particles have great difference. Sulfuric acid was selected as the leaching agent for the tungsten smelting slag, and the iron and manganese were selectively leached. In the calcium-enriched filter residue, the leaching amounts of manganese and iron in the 10 g tungsten smelting slag were about 0.58 g and 2.1 g, respectively. The effects of reaction temperature, solid-liquid ratio, mass fraction of sulfuric acid and reaction time on the leaching rate of iron and manganese were investigated. The optimum conditions were obtained by orthogonal experiment table： reaction temperature 80 ℃, solid-liquid ratio 1∶6（g/g）, mass fraction 25 %（g/g） and reaction time 90 min. The number of leaching is 1 time. The leachate cycle leaching times can increase the concentration of iron and manganese by approximately 50 % and 38 %. The kinetics of the leaching process is more consistent with the control of the diffusion through the product layer, in which the iron leaching rate is faster.
作者
刘健聪
熊道陵
张建平
曹雪文
宗毅
王露琦
欧阳少波
LIU Jiancong;XIONG Daoling;ZHANG Jianping;CAO Xuewen;ZONG Yi;WANG Luqi;OUYANG Shaobo(School of Metallurgy and Chemical Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China)
出处
《有色金属科学与工程》
CAS
2018年第4期14-20,共7页
Nonferrous Metals Science and Engineering
基金
国家自然科学基金资助项目(51364014)
江西省高校专业综合改革试点咨询项目(SZG-14-01-01)
江西理工大学博士启动基金项目(jxxjbs17034)
江西省教育厅科学技术研究项目(GJJ170547)
关键词
钨冶炼渣
浸出率
正交实验表
回收利用
动力学
Tungsten smelting slag
leaching rate
orthogonal test table
recycling
dynamics
