钙、锰钒酸盐体系酸浸过程钒的浸出行为研究  

Study on leaching behavior of vanadium in acid leaching process of calcium and manganese vanadate system

作　　者：李菲菲 温婧 姜涛 李常青[1] 肖浩 Li Feifei;Wen Jing;Jiang Tao;Li Changqing;Xiao Hao(School of Metallurgy,Northeastern University,Shenyang 110819,Liaoning,China;Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education),Shenyang 110819,Liaoning,China)

机构地区：[1]东北大学冶金学院,辽宁沈阳110819 [2]多金属共生矿生态化冶金教育部重点实验室,辽宁沈阳110819

出　　处：《钢铁钒钛》2024年第3期16-24,共9页Iron Steel Vanadium Titanium

基　　金：国家自然科学基金(52174277,52374300,52204309)。

摘　　要：钒酸钙和钒酸锰是钒渣钙化焙烧过程中重要的焙烧产物,其在硫酸中的溶解浸出行为对提钒过程钒收率有重要影响。采用单因素试验递进式研究了浸出pH值、时间及温度对合成钒酸钙(锰)以及钒渣钙化(锰化)、钙锰复合焙烧熟料中钒组元浸出行为的影响。结果表明,合成CaV_(2)O_(6)、Ca2V_(2)O_(7)、Ca3V_(2)O_(8)及Mn_(2)V_(2)O_(7)在pH值分别为3.0、3.0、5.0、2.2的硫酸溶液中于60℃下浸出60 min时,钒的浸出率达到最大值,分别为43.62%、98.79%、97.98%、98.06%。pH值为1.0~2.0时,四种钒酸盐钒的浸出率均出现一个低谷,这是由钒的水解引起的。钒渣常规钙化和锰化焙烧过程中主要生成Ca_(2)V_(2)O_(7)和Mn_(2)V_(2)O_(7)两种钒酸盐,浸出pH值为2.5时,钒的浸出率分别为85.24%、87.07%;钒渣钙锰复合焙烧过程中生成的焦钒酸钙、焦钒酸锰共生复盐,熟料于pH值为2.5的硫酸溶液中浸出后钒的浸出率最大为90.09%,较常规钙化、锰化体系钒的浸出率高约四个百分点,表明钙、锰协同提钒与单一添加剂提钒相比有一定的强化作用。Calcium vanadate and manganese vanadate are important roasting products in the calcification roasting process of vanadium slag,and their dissolution and leaching behavior in sulfuric acid has an important effect on the vanadium yield in the vanadium extraction process.In this paper,the effects of leaching pH,time and temperature on the leaching behavior of vanadium components in the synthesis of calcium vanadate(or manganese vanadate),vanadium slag calcification(or reaction with manganese)and calcium-manganese composite roasting clinker were studied by single factor test step-by-step method.The results showed that the maximum leaching rate of vanadium was 43.62%,98.79%,97.98%and 98.06%when the synthetic CaV_(2)O_(6),Ca_(2)V_(2)O_(7),Ca3V_(2)O_(8) and Mn_(2)V_(2)O_(7) were leached at 60℃for 60 min at pH 3.0,3.0,5.0 and 2.2,respectively.When the pH value is 1.0~2.0,the leaching rate of the four vanadates shows a low peak,which is caused by the hydrolysis of vanadium.Ca_(2)V_(2)O_(7) and Mn_(2)V_(2)O_(7) vanadate were mainly formed during the conventional calcification and manganese roasting of vanadium slag,and the leaching rates of vanadium were 85.24%and 87.07%,respectively,when the leaching pH value was 2.5.The leaching rate of vanadium after clinker leaching in sulfuric acid solution with pH value of 2.5 was 90.09%,which was about four percentage points higher than that of vanadium in conventional calcification and manganese systems,indicating that the synergistic extraction of vanadium from calcium and manganese had a certain strengthening effect on vanadium extraction with a single additive.

关 键 词：钒渣 钙化焙烧 钒酸钙 钒酸锰 浸出行为 

分 类 号：TF841.3[冶金工程—有色金属冶金]