攀钢钒高钛型钒钛磁铁矿烧结技术进步  

SINTERING TECHNOLOGICAL PROGRESE ON HIGH Ti TYPE VANADIC TITANOMAGNETITE IN PVSC

作　　者：何木光 蒋大军 杜斯宏 宋剑 

机构地区：[1]攀钢钒炼铁厂,四川攀枝花617024

出　　处：《四川冶金》2013年第1期14-19,共6页Sichuan Metallurgy

摘　　要：攀枝花钒钛磁铁矿矿物组成复杂,其精矿产品含铁品位低、TiO2含量高,采用阶磨阶选工艺可使精矿品位达到54%,但TiO2仍高达13%左右;该精矿具有"低铁、低硅、高钛、高铝、高亚铁、高硫"的特点,同时精矿粒度粗,制粒性能差,影响烧结透气性;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。近十多年来,通过采取使用生石灰,提高烧结矿碱度,燃料分加,配加普通矿粉,烧结机技术升级,采取高负压大风量烧结等一系列强化技术,烧结取得了重大技术突破,利用系数达到1.4 t/(m2.h)以上,转鼓指数达到73%以上,改变了钒钛精矿烧结多年的落后状况,满足了高炉精料要求,高钛型钒钛磁铁矿烧结技术处于世界先进水平。Panzhihua V-Ti magnetite mineral composition is complex,its low-grade iron ore products, TiO2 content, the use of rank-order selection process allows the mill concentrate grade of 54%, but still as high as 13 % TiO2 ; the concentrate with ＂low iron, low silica, high titanium, aluminum, high-ferrous, highsulfur＂ feature ,while coarse ore particle size, granulation poor performance ,the impact sintering permeability;high melting point of the initial concentrate to produce less liquid, sinter mineral composition is complex, seriously affect the strength and metallurgical properties. Over the past decade, through the use of lime to improve the sinter basicity, adding fuel separately, with addition of ordinary powder, sintering machine technology upgrade, the amount of sintering to high winds and a series of negative pressure to strengthen the technology, have made significant technological breakthroughs sintering, using coefficient of 1.4 t/ （m^2. h） above,the drum index of 72% or more,changing the vanadium and titanium ore sinte- ring years of backwardness, concentrate the blast fumace to meet the requirements of high-vanadium-tita-nium magnetite sintered titanium technology in the world advanced level.

关 键 词：钒钛磁铁矿 矿物特性 烧结特性 生石灰 超高碱度 矿物组成 冶金性能 强化技术 

分 类 号：TF046.4[冶金工程—冶金物理化学]