单一含钒铁精粉制备镁质熔剂性氧化球团试验研究

Experimental Study on Preparation of Magnesia Flux Oxidized Pellets by Single Vanadium-containing Iron Concentrate Powder

为综合开发利用含钒铁精粉资源,助力“高炉-转炉”环节对铁、钒的同步利用,针对宝武集团马钢矿业罗河矿铁精粉含铁高、硅铝低、伴生钒的特点,开展了单一含钒铁精粉制备镁质熔剂性氧化球团的可行性及适宜制备条件的试验研究。试验结果表明:铁精粉经辊磨预处理后,掺合4.84%的添加剂,在适宜的热工条件下,可得到抗压强度为2 500~3 000 N的镁质熔剂球团,全铁品位约为63.55%,伴生V2O5品位约0.32%,球团物理性能良好,化学质量指标较好,冶金性能良好;该试验研发产品弥补了国内镁质熔剂球团不足的短板,同时可为火法提钒工艺提供优质的铁原料和伴生钒原料。

In order to comprehensively develop and utilize the resources of vanadium-containing iron concentrate and help the simultaneous utilization of iron and vanadium in the‘blast furnace-converter’process,aiming at the characteristics of high iron content,low silicon and aluminum content and associat⁃ed vanadium in the iron concentrate of Luohe Mine of Masteel Mining Group of Baowu Group,the feasibili⁃ty and suitable preparation conditions of magnesia flux oxidized pellets prepared from single vanadium-con⁃taining iron concentrate are studied.The results show that the magnesia flux pellets with compressive strength of 2500~3000 N can be obtained under suitable thermal conditions by adding 4.84%additive to the iron concentrate powder after fine iron powderroller mill pretreatment.The total iron grade is about 63.55%,and the associated V2O5 grade is about 0.32%.The physical properties of the pellets are good,the chemical quality index is good,and the metallurgical properties are good.The products developed in this experiment make up for the shortcomings of domestic magnesia flux pellets,and can provide high-quality iron raw materials and associated vanadium raw materials for the pyrometallurgical vanadium extraction process.