首钢配加巴西精粉的烧结试验

Sintering Test with Brazil Concentrate Fine Addition at Shougang

为提高烧结矿品位,在首钢拟定烧结原料结构条件下,采用烧结杯制备烧结试样,进行配加巴西精粉的烧结杯实验,应用转鼓测试强度、光学显微镜和X射线衍射分析显微结构和矿相组成,研究了巴西精粉配比的增加对烧结矿技术指标的影响,重点探讨其与烧结质量的相关性。试验结果表明,提高巴西精粉的配比可以提高烧结矿的品位,使烧结矿品位保持在一个较高的水平(达55%以上);选取巴西精粉和印度粉配比的合理范围对提高烧结质量是非常必要的。

In order to improve sinter grade, under the condition that Shougang set out the composition of sinter raw material, sintering cup was utilized for preparing sinter sample and sintering cup test carried out for Brazil concentrate fine addition. Rotary drum was adopted to measure the strength and optical microscopy and X-ray diffraction were adopted to analyze microstructure and metallographic structure. The paper studies the influence of increasing Brazil concentrate fine addition ratio on the technical indices of sintering ore and focuses on its relevance to sinter quality. Test results showed that increasing the addition ratio of Brazil concentrate fine could improve the grade of sintering ore and keep it at a high level （up to over 55%）; choosing a reasonable range for the addition ratio of Brazil concentrate fine to Indian fine was extremely necessary to the improvement of sinter quality.