用煤泥为还原剂制备海滨砂矿含碳球团

为确定铁品位为51.85%、TiO2含量为11.33%的某海滨砂矿生产含碳球团的合理工艺参数,采用煤泥为还原剂,湿球落下强度、干球抗压强度为评价指标,研究了煤泥用量、水添加量、原矿粒度、黏结剂种类及用量对球团强度的影响。结果表明:与原使用烟煤相比,采用煤泥做还原剂,湿球落下强度由3.7次/个提高到17.8次/个,干球抗压强度由164 N提高到214 N;在煤泥用量为30%、水用量为7%、CMC用量为0.3%条件下,可以获得湿球落下强度大于16次/个,干球抗压强度492N的球团。煤泥具有灰分高、粒度细、黏性大等特性,且价格低廉,为节能高效利用我国海滨钛磁铁矿提供了一种新思路。

Preparation of Carbon-containing Briquettes Made from Beach Placer Using Coal-slime as Reductant

In order to find reasonable parameters for carbon-containing briquettes made from a coastal placer，with iron grade of 51.85% and TiO₂ contents of 11.33%.Using coal slime as the reductant，wet ball drop strength，dry ball compress strength as evaluating criteria，effects on dosage of coal slime，water content，granularity of raw ore，types and amount of binder are researched.Results show that using coal slime as reductant compared with originally bituminous coal，the drop strength of wet ball dropped increased from 3.7 N/P to 17.8 N/P，the comprehensive strength increased from 164 N to 214 N；briquettes with drop strength of wet ball over 16 N/P，comprehensive strength of dry ball is 492 N can obtained with conditions of coal slime dosage is 30%，water content is 7%，CMC addition of 0.3%.For the advantages of higher ash content，finer granularity，higher viscosity，coal slime provides a new method in high efficient utilization of China's beach titanomagnetite.