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本研究在200～1000℃范围内对单独添加NaCl以及同时添加Na_2CO_3和NaCl焙烧钒渣时镓的氯化挥发规律进行了探索。只添加NaCl与钒渣混合焙烧,镓挥发率(ηGa)随NaCl添加量增加而提高,但提高趋势不大,且钒转化为水溶性的比率很小。同时添加Na_2CO_3和NaCl与钒渣混合焙烧,在配料比W钒渣/(W_(Na_2CO_3)+W_(NaCl)))=8/2,W_(Na2CO_3)/W_(NaCl)=2时,800℃下焙烧1h,钒转化率为85％,ηGa=30％,效果较好;ηGa随焙烧温度升高而增加,但为保证钒转化率,焙烧温度应控制在800～900℃之间。
In this study, we studied the volatilization of gallium in the range of 200 ~ 1000 ℃ when adding NaCl alone and adding Na_2CO_3 and NaCl to roast vanadium slag. Only adding NaCl mixed with vanadium slag roasting, the gallium volatilization rate (ηGa) increases with the addition of NaCl, but the increasing tendency is not big, and the conversion ratio of vanadium to water is very small. At the same time, Na_2CO_3 and NaCl were mixed and roasted with vanadium slag. When the ratio of W / (W_ (Na_2CO_3) + W_ (NaCl)) = 8/2 and W_ (Na_2CO_3) / W_ (NaCl) = 2, Under 1 h roasting, the conversion of vanadium is 85%, ηGa = 30%, the effect is better; ηGa increases with the increase of calcination temperature, but in order to ensure the conversion of vanadium, the calcination temperature should be controlled between 800 ~ 900 ℃.