Effect of Roasting Conditions of Pellets Made from Vanadium Slag and NaOH on Pellet Porosity and Vanadium Extraction AITranslate

1造块玻璃去穿越[J].科普童话：恐龙寻踪,2019(3):10-11.

4为什么要进行铁矿粉烧结生产?[J].涟钢科技与管理,2019,0(3):64-64.

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Chinese Library Classification Number:TF802.67[冶金工程—有色金属冶金]

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The effects of five factors of alkali types,pelletization water addition,alkali addition,roasting temperature and time on porosity and vanadium extraction rate of the roasted pellets from vanadium slag were studied.The results show that the surface of roasted pellets with NaOH addition has many large pores with a diameter of about 0.5 mm,while the surface of roasted pellets with Na2CO3 addition has no such macropores.Moreover,the porosity of the two pellets with NaOH and Na2CO3 addition is 32% and 6%,and the vanadium extraction rate is 92% and 52%,respectively.When water addition is 3%,the porosity of roasted pellets with NaOH addition reaches a maximum of 36.7%,while the vanadium extraction rate reaches a maximum of 97% with 4.5% water addition.When NaOH addition is 35.5%,the porosity of roasted pellets reaches a maximum of 38% and the vanadium extraction rate also reaches a maximum of 98%.When the roasting temperature is 740 ℃,the porosity of roasted pellets with NaOH addition reaches a maximum of 40%,while the vanadium extraction rate reaches a maximum of 97% at the roasting temperature of 680 ℃.When the roasting time is 60 min at 800 ℃,the porosity of roasted pellets with NaOH addition reaches a maximum of 40% and the vanadium extraction rate also reaches a maximum of 96%.There is a positive correlation between the porosity and the vanadium extraction rate of roasted pellets.