煤中视(相对)密度测定的影响因素

Influence Factors of Determining the Optic (Relative) Density of Coal

煤中视(相对)密度是表示煤的物理特性的重要指标。阐述了煤中视(相对)密度测定方法原理;对测定条件进行了实验研究,对封蜡温度、封蜡效果、十二烷基硫酸钠溶液这3个影响视(相对)密度测试结果准确性的因素进行了探讨。得出最适封蜡温度为70~75℃,十二烷基硫酸钠溶液的浓度为0.05%。

The optic(relative)density in coal is an important index to the physical properties of coal.The principle of determination method of the optic(relative)densityin coal was expounded;the determination conditions were studied,the factors affecting the accuracy of the test results,such as wax temperature,wax effect and sodium dodecyl sulfate solution were discussed.The most suitable wax temperature was 70~75 ℃,concentration of sodium dodecyl sulfate solution was 0.05%.