用煤芯煤样进行煤炭可选性研究

COAL WASHABILITY STUDY WITH COAL CORE SAMPLES

煤炭工业部标准ＭＴ３２０－９３《煤芯煤样可选性试验方法》已在全国广泛使用，它的主要特点是试验煤样用量少，采样点多，用煤芯煤样进行可选性的研究结果可以充分显示煤层三维空间上的可选性变化规律．测定煤样的密度组成不仅可用浮沉试验方法，也可用煤岩学方法．用煤芯煤样可选性资料作为选煤厂的设计依据，将从根本上保证选煤厂的工艺设计质量．

The standard MT320-93 Method for Testing Washability of Coal Core Sample formulated by the Ministry of Coal Industry is widely used throughout China.The main attractions of the method include less amount of coal samples used and more sampling points.The result of the study can well depict the laws governing the 3-dimensional variation of washability.The density of coal sample can be measured either by float-and-sink method,or by petrographic method. Use of coal core sample washability data as criteria for designing coal preparation plants will ensure the quality of process design of coal preparation plants.