(中南大学 资源与安全工程学院，长沙 410083)
摘 要: 介绍了一种粉尘湿润剂的性能测定方法。该方法是将一定质量的粉尘分散在制备好的湿润剂溶液中并搅匀，经过短时间的沉淀后，采用高精度激光粒度分析仪，测定悬浮在溶液中的粉尘粒径和分散度。结果表明：悬浮在溶液中的粉尘颗粒大小和分散度随着溶液中的湿润剂类型、湿润剂质量浓度和沉淀时间的不同而变化。因此，应用高精度激光粒度分析仪可以间接地研究粉尘湿润剂的性能，从而达到开发新的粉尘湿润剂的目的。以湖南某铅锌矿矿尘为研究对象，对粒径小于20 μm的微尘进行实验，证明了该测定方法的可行性，并获得一组抑制铅锌矿矿尘的湿润剂配方。
关键字: 粉尘；湿润剂性能；激光粒度分析仪；测定方法
and its application
（School of Resources and Safety Engineering, Central South University, Changsha 410083, China）
Abstract: A new measuring method of dust wetting agent performance was described. Firstly, a small quantity of fine dust is deposited in the preparatory wetting agent solution and disturbed in homogeneously. It is kept for a moment and some dust particles with rather large size have deposited. Then particle sizes and distribution of suspended dust in the solution are measured by a laser particle analyzer with high accuracy. By changing the type of wetting agents and their concentrations in solution but keeping other conditions constant, the particle size and distribution in the solutions are measured again and again with the same test method described above. The variations of particle sizes and distribution of dust suspended in the solutions will be known by the approach and these variations are caused by the changes of wetting agents and concentrations as well as the depositing time. Therefore, the high accuracy laser particle analyzer can be used to measure the dust wetting agent performances indirectly. The measuring method can be applied for inventing new dust wetting agents. Accordingly, some dust sample of concentrated lead-zinc mineral collected from a lead-zinc mine in Hunan province was used for this study. After conducting a great number of tests of measuring the dust particle sizes less than 20 μm, the invented measuring method is proved to be reliable. Also, the optimal compositions of wetting agents for suppressing the lead-zinc dust in the mine were obtained.
Key words: dust; wetting agent performance; laser particle size analyzer; measuring method
