当前位置: X-MOL 学术Hydrometallurgy › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Extraction of tungsten from scheelite concentrate using a methanesulfonic acid- phosphoric acid coleaching process followed by solvent extraction with N1923
Hydrometallurgy ( IF 4.8 ) Pub Date : 2022-06-08 , DOI: 10.1016/j.hydromet.2022.105917
Jiangtao Li , Muye Cui , Zhongwei Zhao , Xuheng Liu , Xingyu Chen , Lihua He , Fenglong Sun , Luping Xiao , Xiangkun Li , Longze Wang

Methanesulfonic acid (CH3SO3H) is a nonvolatile acid, and its calcium salt shows high solubility. These advantages of CH3SO3H have been utilized to leach scheelite in the presence of H3PO4. Thus, tungsten enters the solution as phosphotungsten heteropolyacid and calcium enters the solution as a soluble calcium salt. Because of the absence of solid products, over 98.5% of the scheelite was digested under the following conditions: CH3SO3H concentration of 2.5 mol/L, H3PO4 concentration of 10 g/L,a liquid/solid ratio of 10:1, a leaching temperature of 80 °C, and a leaching time of 4 h. Over 99.9% tungsten was extracted from the leaching solution under the following conditions: 15% N1923 concentration, an O/A ratio of 1:1, a temperature of 20 °C, and a contact time of 10 min. Then, CH3SO3H was regenerated by adding H2SO4 to the raffinate, producing a high-quality gypsum. Subsequently, the solution obtained from the CH3SO3H regeneration process was reused to leach scheelite after adding the consumed CH3SO3H. The efficient extraction of tungsten and the decrease in wastewater and waste residue discharge in this technology indicate its potential for industrial applications.



中文翻译:

使用甲磺酸-磷酸共浸工艺从白钨精矿中提取钨,然后使用 N1923 进行溶剂萃取

甲磺酸(CH 3 SO 3 H)是一种非挥发性酸,其钙盐具有很高的溶解度。CH 3 SO 3 H的这些优点已被用于在 H 3 PO 4存在下浸出白钨矿。因此,钨作为磷钨杂多酸进入溶液,而钙作为可溶性钙盐进入溶液。由于没有固体产物,超过 98.5% 的白钨矿在以下条件下被消解: CH 3 SO 3 H 浓度为 2.5 mol/L,H 3 PO 4浓度10 g/L,液固比10:1,浸出温度80 ℃,浸出时间4 h。在以下条件下从浸出液中提取超过 99.9% 的钨:15% N1923 浓度、1:1 的 O/A 比、20°C 的温度和 10 分钟的接触时间。然后,通过向萃余液中添加 H 2 SO 4使CH 3 SO 3 H 再生,生产出高质量的石膏。随后,将CH 3 SO 3 H再生过程中得到的溶液加入消耗的CH 3 SO 3后,重新用于浸出白钨矿。H.该技术中钨的高效提取以及废水和废渣排放的减少表明其具有工业应用潜力。

更新日期:2022-06-08
down
wechat
bug