Leaching of Vanadium and Tungsten from Spent Denitrification Catalyst

Abstract

本文采用黑龙江某工厂脱销过程中产生的废脱硝催化剂作为原料，每次取15 g废脱销催化剂，在高压釜中用氢氧化钠作浸出剂，研究氢氧化钠用量、浸出温度、浸出时间、液固比对浸出率的影响。实验结果表明：控制氢氧化钠用量为18 g，浸出温度140℃，浸出时间5 h，m(H2O)/m (催化剂) 6.7:1，搅拌速度为200 r/min时，钒和钨的浸出率都达到100%。 In this paper, the spent denitrification catalyst produced in the process of selling out of a factory in Heilongjiang province was used as raw material, and 15 g of spent denitrification catalyst was taken at each time. Sodium hydroxide was used as the leaching agent in the autoclave to study the effects of sodium hydroxide dosage, leaching temperature, leaching time and liquid-solid ratio on the leaching rate. The results showed that when the sodium hydroxide dosage was controlled at 17 g, the leaching temperature was 140˚C, the leaching time was 5 h, the liquid-solid ratio was 6.7:1, and the stirring speed was 200/min, the leaching rates of vanadium and tungsten reached 100%.