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攀枝花钒钛磁铁矿矿物组成复杂,属于难选、难烧、难炼的矿石,其精矿含铁品位低,TiO2含量高,粒度粗,制粒性能差,影响烧结透气性。采用阶磨阶选工艺可提高铁品位2%左右,但TiO2变化不大。该精矿初始熔点高,生成液相量少,烧结矿矿物组成复杂,严重影响强度与冶金性能。烧结采取了使用生石灰、提高烧结矿碱度等主要强化技术,烧结与高炉冶炼取得了重大技术突破。
The complex composition of vanadium-titanium magnetite in Panzhihua belongs to refractory, hard-burning and refractory ore. The concentrate contains low iron content, high TiO2 content, coarse particle size and poor granulation performance, which affects the sintering gas permeability. The use of multi-stage milling process can increase the iron grade of about 2%, but little change in TiO2. The high initial melting point of the concentrate, the formation of liquid phase, sinter minerals complex composition, seriously affecting the strength and metallurgical properties. Sintering took the use of quicklime, improve the basicity of sinter and other major strengthening technology, sintering and blast furnace smelting has made major technological breakthroughs.