烟煤分类的新指标——粘结指数

New index for bituminous coal classificationcaking Index

制订煤炭新的分类方案,需要选择一个能反映煤粘结性的指标,在炼焦生产及实际应用中,也需要寻求一些指标能较确切地评价炼焦用煤。1979年12月在厦门召开的中国煤炭分类学术会议上,正式选定烟煤粘结指数作为煤炭分类新方案中划分烟煤类别的主要指标。1984年9月已通过粘结指数测定方法为国家标准。 1.

this paper describes the test and the process of se(?)ting up a bituminous coal caking index, a majer index for a new coal classification system in China. The caking property of coal is the most important feature in thermal process. The paper discusses selection of special anthracite for caking index, coking condition, the size distribution and floatation methed for bituminous coal used in tests, mining operation, the effect of anthraeite size and blend ratio on the test value of caking index. The formula for calculating G value is proposed. The permissible errer of G value in the laboratory is discussed. By combining the caking index with volatile matter of bituminous coal on combustible basis we can evaluate accurately coking coal. The V:-G diagram for predicting the coke strength has already been applied to coke production.