当前,判断燃煤结焦性的一个重要依据是灰熔特性,即灰的开始变形温度、软化温度和熔化温度。众所周知,测定这特性时先把灰样做成圆柱体或立方体,然后缓慢加热,并用照相的方法拍下在不同温度下的外形变化。有时单个矿物颗粒虽已发生变形,但试样还保持其原有外形。在缓慢加热过程中,会由于释放气体而产生气隙,接着被一些先熔物质所填充, At present, an important basis for judging coal coking property is ash melting property, that is, ash start deformation temperature, softening temperature and melting temperature. As we all know, the determination of this feature first made of gray samples into a cylinder or cube, and then slowly heated and photographed at different temperatures under the shape changes. Sometimes a single mineral particles have been deformed, but the sample also maintains its original shape. During slow heating, an air gap is created due to the release of gas, which is then filled with some of the precursor melt,