包钢烧结配加高硅熔剂性褐铁矿的试验研究

Experimental Study on Adding High Silicon Fluxed Limonite into Sintering of Baotou Steel

文章针对白云鄂博铁精矿SiO_(2)含量低的特点,进行了高硅熔剂性褐铁矿替代蛇纹石的烧结试验,提出了高硅熔剂性褐铁矿在包钢烧结使用的技术方案,可为包钢烧结生产优化铁料结构和熔剂结构以及大幅降低生产成本提供技术支持。试验结果表明,烧结配加10.2%水洗重选后的高硅熔剂性褐铁矿,烧结配矿成本降低,但烧结矿转鼓强度降低1.87个百分点,燃耗升高1.06 kg/t;烧结配加3.4%高硅熔剂性褐铁矿(原矿),烧结配矿成本降低,烧结矿质量指标无显著变化,因此建议采用高硅熔剂性褐铁矿(原矿)用于调整烧结矿的SiO_(2)含量。

In the paper,the technical plan of applying high silicon fluxed limonite in sintering of Baotou Steel is proposed through carrying out the sintering experiment of replacing serpentine with high silicon fluxed limonite aiming at the characteristic of low content of SiO_(2)in Bayan Obo iron concentrate,which could provide technical support for optimizing the structures of iron charge and flux as well as greatly reducing production costs of sintering production of Baotou Steel.The experiment results showed that the cost of ore proportioning of sintering reduced,but drum strength of sinter decreased by 1.87 percentage points and burn-up increased by 1.06 kg/t by adding 10.2%high silicon fluxed limonite after washing and re-separation into sintering;the cost of ore proportioning of sintering reduced and there were no obvious changes for quality index of sinter by adding 3.4%high silicon fluxed limonite(raw ore),so it was suggested to adopt high silicon fluxed limonite(raw ore)for adjusting the content of SiO_(2)in sinter.