提高转炉优钢水口自开率

炼钢厂银山前区通过采取深入研究铬质引流砂的特性、调整铬质引流砂的加入方式、改进现场存放制度、推行标准化装包作业、固定连铸机液压缸丝头等措施,使钢包水口自开率由86%左右提高到95%以上,解决了转炉优钢全精炼条件下80 t钢包水口自开率低,直接影响连铸生产的稳定顺行以及优钢产品质量的问题,提升了转炉优钢质量,保障了生产顺行,降低了环境污染。

Optimum blending of iron ore from Choghart stockpiles by using goal programming

Iron and steel industry is an important sector of Iran's economy.Choghart iron ore mine is an important iron ore producer of Iran steel industry.Phosphorous contained in the iron ore concentrates of Choghart mine has a detrimental effect on the steel making process,whereby this causes cracks to form in the refractory lining of blast furnaces.In the past,about 1.43 Mt of low-grade and 4.53 Mt of high-phosphorous materials had been transported to low grade and high phosphorous stockpiles,respectively,for future beneficiation.As a result of the progressive depletion of high-grade ore and establishment of beneficiation plant in Choghart,exploitation of these two stockpiles in this mine became an important issue.In this work,a linear goal programming(GP) model was developed in order to determine the optimum iron ore blend in terms of quality from low grade and high phosphorous stockpiles of Choghart mine.The model was solved by the SOLVER V.9 program.Results show that feeding with acceptable quality(w(Fe)≥50% and w(P)≤1.2%,mass fraction) materials can be blended from stockpiles that satisfy the needs of the Choghart processing line.

提高90t钢包水口自开率的措施

莱钢炼钢厂通过对90 t钢包水口自开率影响因素进行系统研究分析,采取铬质引流砂的合理选用、改进水口座砖、调整铬质引流砂的加入方式、改进现场存放制度、推行标准化装包作业、固定连铸机液压缸丝头、研究应用钢包红净出钢技术等措施,使钢包水口自开率由86%提高到95%以上,解决了转炉优钢全精炼条件下90 t钢包水口自开率低的问题,提升了转炉优钢质量,保障了生产顺行,降低了环境污染。