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利用X射线衍射(XRD)、扫描电镜(SEM)等手段考察了焙烧温度对提钒尾渣煤基直接还原效果的影响,并利用磨矿-磁选方法对焙烧产物进行了金属铁的分离实验.结果表明:最有利于金属铁析出、兼并、长大以及金属铁和渣相单体解离的焙烧温度是1200℃,在此温度下,提钒尾渣中的Fe2O3基本还原成了金属铁,Fe2TiO5基本转变成了金属铁和TiO2.铁质量分数36.54%、TiO2质量分数9.28%的提钒尾渣,经1200℃焙烧所得产物经过二段磨矿-二段磁选可获得铁质量分数90.90%、TiO2质量分数0.56%的金属铁粉.
The effects of calcination temperature on the direct reduction of coal-based vanadium tailings were investigated by means of X-ray diffraction (XRD) and scanning electron microscopy (SEM). The separation of metal iron from roasted products The results show that the calcination temperature, which is the most favorable for the precipitation, merging and growing of metallic iron, and the dissociation of metallic iron and slag phase monomer, is 1200 ℃, at this temperature, the Fe2O3 in the tailing slag is reduced to metallic iron , Fe2TiO5 basically transformed into metallic iron and TiO2 iron content of 36.54%, TiO2 mass fraction of 9.28% of the vanadium tailings obtained after calcination at 1200 ℃ after two paragraphs of grinding - two sections of magnetic iron content can be obtained 90.90 %, The mass fraction of TiO2 0.56% of the metal iron powder.