硫酸铵熔融反应法从含钛高炉渣中回收钛  

Recovery of titanium from titanium-bearing blast furnace slag by ammonium sulfate melting method

作　　者：王思佳[1] 张悦[1] 薛向欣[1] 杨合[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110819

出　　处：《化工学报》2012年第3期991-995,共5页CIESC Journal

基　　金：国家重点基础研究发展计划项目(2007CB613504)~~

摘　　要：以承钢含钛高炉渣、(NH4)2SO4和KHSO4为主要原料,通过熔融反应法使其中的钛转化为易溶于水的形式,达到回收钛的目的。考察了(NH4)2SO4加入量、KHSO4加入量、加热温度和保温时间对钛回收率的影响。实验结果表明,反应温度和保温时间对钛回收率的影响较大。回收钛的最适条件为:含钛高炉渣与(NH4)2SO4的质量比为1∶6,反应温度为350℃,保温时间为27min,在此条件下钛的回收率为91.7%,硫酸铵中氮的挥发损失率为81.5%。回收钛后所得残渣主要含有大量硫酸钙、二氧化硅和少量钙钛矿、钙铝黄长石。A melting reaction process was developed to transform the titanium in titanium-bearing blast furnace slag into water-soluble one,such as TiOSO4 by the treatment with ammonium sulfate and potassium bisulfate,to recover titanium.The effects of quantities of ammonium sulfate and potassium bisulfate added,reaction temperature and holding time on the recovery rate of titanium were investigated systemically.The experimental results showed that reaction temperature and holding time have a great impact on the recovery of titanium.The recovery rate of titanium was improved with an increase of reaction temperature and holding time.The optimum conditions of titanium recovery from titanium-bearing blast furnace slag were as follows： the mass ratio of slag to ammonium sulfate 1∶6,reaction temperature 350℃,and holding time 27 min.Under such conditions the recovery rate of titanium was up to 91.7% and the evaporation loss rate of nitrogen from（NH4）2SO4 was 81.5%.The residue obtained after recovery of titanium was mainly composed of CaSO4·H2O,CaSO4·0.5H2O,SiO2,a small amount of CaTiO3 and Ca2Al2SiO7.This study promises significant economic benefits for smelting enterprise.

关 键 词：含钛高炉渣 二氧化钛 回收 

分 类 号：TF111.3[冶金工程—冶金物理化学]