Analyze moisture Mad% ash ad% volatile Vd% fixed carbon Fc% total sulfur Std% combustible volatile Vdaf% coke powder content% mechanical strength.
Analysis indexes of anthracite (coal injection) for steelmaking: total moisture Mt%, ash Ad% and total sulfur Std%.
Analysis index of clean coal for coking: total moisture Mt% ash Ad% total sulfur Std% volatile Vd% adhesion index g > *%.
MJ/kg is the unit of calorific value, megajoule/kg.
M stands for water and refers to the proportion of water in coal.
Q stands for calorific value, which is the heat released when coal burns.
S represents the proportion of sulfur in sulfur-containing coal.
V stands for volatile substances. Volatiles refer to substances that volatilize when heated and come out before burning.
G stands for caking index, which is the degree of caking of coal during combustion.
Y represents the maximum thickness of the colloidal layer and the thickness when burning with it.
Extended data:
The residue left after coal is completely burned is called ash, especially in ash and inherent ash. External ash comes from rock fragments and research in the roof, which has a great relationship with the rationality of coal mining methods. Most of the external ash can be removed by sorting. Intrinsic ash is an inorganic substance contained in primitive plants that form coal. The higher the inherent ash content, the worse the washability of coal.
Ash is a harmful substance. The ash content in power coal increases, the calorific value decreases, the slag discharge increases, and the coal is easy to slag. Generally speaking, for every 2% increase in ash, the calorific value will decrease by about 100 kcal/kg. The ash content of refined coal increases, the utilization coefficient of blast furnace decreases, the strength of coke decreases and the consumption of limestone increases; When the ash content increases by 65438 0%, the coke strength decreases by 2%, the blast furnace production capacity decreases by 3%, and the limestone consumption increases by 4%.
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