一种评价煤泥颗粒凝聚效果的激光粒度分析方法

A method of laser particle size analysis for evaluating coagulation of coal slime

为了实现对煤泥颗粒凝聚效果的量化评价,使用了一种激光粒度分析的方法.通过激光粒度分析仪,测试煤泥颗粒在不同转速和不用浓度的Ca2+或Na+溶液中的粒度分布.结果表明:Ca2+比Na+更容易使煤泥颗粒凝聚,Ca2+浓度越高,煤泥颗粒越容易凝聚.在转速为1 000rpm和Ca2+浓度大于5mmol/L时,颗粒的凝聚效果最好,d90可达到700μm以上.根据煤泥颗粒粒度分布的d10,d50和d90的大小,可实现对颗粒凝聚效果的量化分析.

A method of laser particle size analysis was proposed to evaluate the coagulation of coal slime particles. The laser particle size analyzer was used to measure the particle size distri- bution of coal slime at different stirring rates and different concentrations of Ca2＋ or Na＋. The results show that Ca2＋ is more effective than Na＋ to make the coal slime coagulated, and the higher the concentration of Ca2＋ is, the easier the coagulation of coal slime is. The best coagulation performance, which dgois greater than 700μm, occurred at stirring rate of 1000 rpm and Ca2＋ concentration of over 5 mmol/L. The quantitative analysis of coal slime coagulation can be realized by the d10, d50 and d90.