【摘要】 加拿大精粉属于镜铁矿,具有品位高,有害元素含量低,杂质少等特点,对提高烧结矿品位和强化高炉冶炼具有重要作用。采用微型烧结的方法对加拿大精粉与主流矿进行各种性能对比分析研究,探索配入0～15%加拿大精粉的烧结性能,在此基础上进行烧结杯配矿试验。试验结果表明:随着加拿大精粉配比的提高,混合矿粉的黏结相强度先增加后降低,加拿大精粉配入10%时,黏结相强度达到最高值1 360 N;混合矿粉的流动性指数由2.86升高到3.13,呈增加趋势;烧结过程中,垂直烧结速度由23.0 mm/min逐渐降低到19.1 mm/min;烧结矿转鼓强度由67.3%提高到70.4%;成品率由80.8%提高到82.5%,但利用系数先增加后降低。综上所述,加拿大精粉配比为5%时,烧结矿产质量指标最佳,转鼓强度和成品率分别达到70.3%和82.8%,利用系数达到最高为1.608 t/m~2·h,可满足邯钢烧结生产要求,优化烧结矿质量的同时降低成本。更多还原

【Abstract】 Canadian concentrate belongs to specularite,which has the characteristics of high grade,low harmful element content,and low impurity content.It plays an important role in improving the grade of sinter.The performance of Canadian concentrate and mainstream ores was analyzed and compared through the micro sintering method,which explored the performance of adding 0-15% Canadian concentrate,based on this,sintering cup experiments were researched.The results show that with the increase of Canadian concentrate,the strength of bonding phase increases and then decreases,when the ratio of Canadian concentrate is 10%,the strength of bonding phase reaches the highest 1 360 N,the fluidity index increases from2.86 to 3.13,during the sintering process,the vertical sintering speed gradually decreases from 23.0 mm/min to 19.1 mm/min,and the drum strength increases from 67.3% to 70.4%,and yield improves from 80.8% to 82.5%,but the utilization factor increases first and then decreases.To sum up,when the ratio of Canadian concentrate is 5%,the quality index of sinter is the best,the drum strength and yield reaches 70.3% and 82.8% respectively,the utilization factor is 1.608 t/m~2·h,indicating that a certain range Canadian concentrate can meet the sintering production,optimize the quality of sinter,and reduce costs.更多还原