高钛型酸性烧结矿试验研究

Experimental study of high titanomagnetite sinter

针对西昌钢钒受生矿资源条件限制,烧结和高炉物料结构调整频繁,对生产不利的问题,本文着重对利用钒钛精矿生产酸性钒钛烧结矿替代生矿的开发过程进行了简述。研究结果显示,控制燃料配比5%,生产碱度为0.6,TiO_2含量5.5%的酸性钒钛烧结矿产质量最优。酸性钒钛烧结矿替代生矿入炉后,可以减少原料有害元素的带入量,抑制低价钛还原,工业试验通过提高球团矿配比、发展中心煤气流,提高富氧、顶压和炉温稳定性等措施,试验期高炉炉况稳定顺行,利用系数提高0.082t/m^3·d,铁损降低0.51%,燃料比降低5.47 kg/t。

According to the limitation of the raw material resources of Xichang steel and vanadium, the material structure of sintering and blast furnace is frequently adjusted, which is unfavorable to the production. In this paper, the development process of producing acid vanadium titanium sinter with vanadium-bearing titanomagnetite concentrate instead of raw ore is introduced. The results showed that optimal quality and yield of acidic sinter could be obtained when the ratio of fuel was 5 %, the basicity of sinter was 0.6 and the content of TiO2 was 5.5 %. After acidic vanadium-bearing titanomagnetite sinter was used to replace raw ore, the amount of harmful element brought in by material were reduced and the reduction of TiO2 was prohibited. During the industrial test, improving the ratio of pellet, developing central gas flow, improving the rate of oxygen enrichment, top pressure and the stability of furnace temperature, the operation of blast furnace was successful, the utilization coefficient of blast furnace increased by O. 082 t/（ m^3·d） , iron loss decreased by O. 51% and fuel rate decreased by 5.47 kg/t.