Articles
National coal classification
by Tiantian Xiaotiantian building materialsNational standard of the coal is divided into three categories, namely, anthracite, bituminous coal and lignite, a total of 29 small class. Anthracite is divided into 3 subcategories, digital 01, 02, 03, "0" in the digital representation of anthracite, a digit that the degree of coalification, digital small said high rank bituminous coal; divided into 12 categories, 24 small classes, in the digital ten digit (1~4) representation of the degree of coalification, number small word said high rank; a digit (1~6) representation of cohesiveness, digital high expressed strong adhesion; lignite is divided into 2 subcategories, digital 51, 52, in the digital "5" said lignite, a digit that the degree of coalification coalification degree low, the small digital representation.
In the digital number of various kinds of coal, the ten number represents the volatile size, such as anthracite volatile minimum, ten digit is 0, the largest lignite volatile, the ten digit is 5, between the ten numbers between 1~4 bituminous coal, a digit of soft coal, is the characterization of their binding properties or coking properties such as good or bad, a bit higher numbers, characterization of the bonding is stronger, such as a number 6 soft coal, fat coal is greater than 25mm or gas value maximum thickness of plastic layer Y, a median of 1 soft coal, are no caking coal, such as lean coal, non caking coal and bituminous coal for long. A digital 2~5 bituminous coal, their adhesion enhanced with the increase of digital.
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About Tiantian Xiaotiantian 
building materials
71 connections, 0 recommendations, 200 honor points.Joined APSense since, January 12th, 2015, From beijing, China.
Created on Dec 31st 1969 18:00. Viewed 0 times.
