碳酸钙沉淀法从钨酸钠溶液中深度脱除磷的研究  

Deep Removal of Phosphorus from Sodium Tungstate Solution by Calcium Carbonate Precipitation Method

作　　者：方君娟 王水龙 杨亮[3] FANG Junjuan;WANG Shuilong;YANG Liang(Zhejiang Disabled Sports Training and Guidance Center,Hangzhou 310000,Zhejiang,China;Ganzhou Haichuang Tungsten Industry Co.,Ltd.,Ganzhou 341500,Jiangxi,China;Jiangxi University of Science and Technology,Department of Materials Metallurgy and Chemistry,Ganzhou 341000,Jiangxi,China)

机构地区：[1]浙江省残疾人体育训练指导中心,浙江杭州310000 [2]赣州海创钨业有限公司,江西赣州341500 [3]江西理工大学材料冶金化学学部,江西赣州341000

出　　处：《中国钨业》2019年第5期42-45,共4页China Tungsten Industry

基　　金：中国博士后面上项目(2018M632594);江西省青年基金项目(20171BAB216025)。

摘　　要：磷酸钠和氢氧化钠混合能够实现低品位白钨矿和黑白钨混合矿的高效浸出,但浸出液中会残留一定浓度的杂质磷。本研究采用碳酸钙沉淀法从浸出液中除磷,考察了碳酸钙用量、反应温度、反应时间、溶液中初始磷浓度和氢氧化钠浓度对粗钨酸钠除磷的影响。试验结果表明:当碳酸钙用量为1.4倍理论量,温度65℃,搅拌反应90 min,溶液中初始磷浓度0.95~2.0 g/L,氢氧根浓度10.68 g/L,除磷率达到99%以上,沉淀渣中钨损失率约0.17%,除磷后溶液中钨磷比达到1.5×10^4,实现了低钨损条件下粗钨酸钠溶液的深度净化除磷。The mixed sodium phosphate and sodium hydroxide leach enables efficient leaching of low grade wolframite and black and white wolframite blends,but a certain concentration of impurity phosphorus remains in the leach solution.In this study,the effect of calcium carbonate amount,reaction temperature,reaction time,initial phosphorus concentration in solution and sodium hydroxide concentration on the removal of phosphorus from sodium crude tungstate was investigated by using calcium carbonate precipitation method to remove phosphorus from the leaching solution.The experimental results showed that when the amount of calcium carbonate was 1.4 times the theoretical amount,the temperature was 65℃,and the stirring reaction was 90 min,the initial phosphorus concentration in the solution was 0.95~2.0 g/L,the hydroxide concentration was 10.68 g/L,the phosphorus removal rate reached more than 99%,the tungsten loss rate in the sediment slag was about 0.17%,and the tungsten-phosphorus ratio in the solution after phosphorus removal reached 1.5×10^4,which achieved the deep purification and phosphorus removal of crude sodium tungstate solution under low tungsten loss conditions.

关 键 词：钨酸钠 碳酸钙 除磷 白钨矿 

分 类 号：TF111.31[冶金工程—冶金物理化学]