Study on the properties of huangling coal and its application in coking

Huangling coal is a new kind of coal mined from a colliery with more than ten million tons per annum. In order to use it better, firstly, its properties are studied systematically, including preliminary analysis, ultimate analysis, ash component analysis, maceral (petrographic) analysis, vitrinite reflectance analysis, technological property analysis, Hardgrove grindability analysis, coking property analysis, harmful element analysis ( e.g. phosphorus, arsenic, hydrargyrum, chromium, plumbum etc.) and so on. It is found that the huangling coal is a gas coal with low ash content, low sulfur content, medium phosphorus content, low arsenic content, low chromium content, low plumbum content, medium hydrargyrum content according to Chinese classification standard of coal. Then the huangling coal is used to blend and to coke. The effect of the ratio and fineness of Huangling coal in blend on coke quality, including mechanical strength (M40 M10) thermal performance (CRI, CSR), micro-strength (MSI), porosities, densities, optical texture etc., is studied systematically. Experimental results show that the huangling coal possesses good coking property. When its proportion ranges from 2%-20% and under the conditions of different fineness, the various indexes of coke quality are stable basically.