攀西钒钛磁铁矿高压辊磨的产品特性

对攀西钒钛磁铁矿进行了高压辊磨超细粉碎,分析了不同粉碎工艺对粉碎产品粒度特性的影响,研究了不同粉碎方式下矿石Bond球磨功指数的变化以及微裂纹产生的情况.结果表明：辊面压力的增加使粉碎产品的破碎比增大,粒度分布更加均匀;边料循环量的增加,使粉碎产品粒度变细,但均匀性降低;-3.2 mm分级全闭路循环的粉碎产品与颚式破碎机产品相比细粒级含量明显增加,而且粒度分布更加均匀;高压辊磨机粉碎的钒钛磁铁矿石内部产生了大量的晶内裂纹和解离裂纹,使其Bond球磨功指数（目标粒度0.074 mm）比颚式破碎机的粉碎产品降低14.05%.

Product Characteristics of Vanadium-Titanium Magnetite from Panxi by High Pressure Grinding Roller

Vanadium-titanium magnetite from Panxi was superfinely crushed by high pressure grinding roller.The particle size characteristics of the crushed product from different crushing processes were analyzed,and the modification of the work index of ball mill and emerging of the micro-crack by different crushing manner were studied.The results showed that,in crushed products,the reduction ratio increases and the size distribution becomes more uniform with increasing of the pressure on roller surfaces.The particle size decreases but uniformity reduces with increasing of the edge products circulating mass.And the fine fraction content of crushing products from-3.2 mm classification closed-circuit by HPGR increases obviously compared with that by Jaw Crusher and particle size distribution is more uniform.Large amount of intracrystalline cracks and cleavage cracks are generated in vanadium-titanium magnetite crushed by HPGR,which makes the Bond work index of ball mill(objective particle size is 0.074 mm) of vanadium-titanium magnetite 14.05% lower than that by Jaw Crusher.