含钒石煤富氧焙烧工艺研究

Study on Oxygen-enriched Air Roasting Process for Vanadium-bearing Stone Coal

以陕西某含钒石煤为原料,进行了富氧焙烧工艺研究。考察了焙烧温度、焙烧时间、磨矿粒度和焙烧气氛等因素对焙砂中钒氧转率的影响。实验得出最佳焙烧条件为:焙烧温度850℃,焙烧时间30 min,磨矿粒度-74μm,氧气浓度80%,在此条件下可以得到钒氧转率78%以上的焙砂。

Studies on oxygen-enriched air roasting process were conducted by using some vanadium-bearing stone coal in Shaanxi Province as raw material. The effects of roasting temperature, roasting time, grinding size and roasting atmosphere on the conversion rate of vanadium oxidation in calcines were investigated. The optimum roasting conditions were obtained from experiments as follows： the roasting temperature was 850 ℃, roasting time was 30 min, the grinding size was -74 μm and the oxygen concentration was 80% conversion rate of vanadium oxidation above 78%. Under these conditions, the calcine can be obtained with the