What are the quality requirements for coking coal?

Coal quality requirements for coking Coking is to heat coal in a retort furnace. As the temperature rises (eventually reaching about 1000°C), the organic matter in the coal gradually decomposes. Among them, the volatile substances escape in the gaseous or steam state and become coal gas and coal tar. The remaining non-volatile product is coke. Coke plays the role of reducing and melting ore in the iron-making furnace, providing heat energy and supporting the charge, and maintaining good air permeability of the charge. Therefore, the quality requirements for coking coal are to obtain high-quality metallurgical coke with high mechanical strength, uniform lumpiness, and low ash and sulfur content. * * There are special quality standards for metallurgical coking coal, as follows:: The ash content of fat coal and gas coal is grade 1-13 (not more than 5.5% is a grade, and each increase of 0.5% increases the grade to 13). The sulfur content of group 1 is not more than 0.5%. Group 2 is 0.51-1%. Group 3 is 1.01-1.5. Moisture content of No. 1 is not more than 0.9%. No. 2 is 9.0-10%. No. 3 is 10.0-12.0. The ash level of coking coal and lean coal is 11.5%. Sulfur content in group 1 is not more than 0.5%, group 2 is 0.51-1%, group 3 is 1.01-1.5, moisture content is not more than 0.9% in group 1, 9.0-10% in group 2, 10.0-12.0 in group 3

Tamping coking technology is a coking technology that mixes more high-volatile coal and weak caking coal according to the different uses of coke. After tamping the mixed coal with a tamping machine in the coal box of the coal loading coke cart, it pushes it from the side of the coke oven machine into the carbonization chamber for high-temperature carbonization.

Steel plant coking coal quality standards (coking coal for secondary coking) No. Coal type Ad% vdaf% std% MT % GY 1 Gas coal ≤8 ＞37 ≤0.8 ≤ 8 ≥65 ≤25 2 Gas-fat coal ≤8.5 ＞37 ≤0.85 ≤ 8 ≥85 ＞25 3 Fat coal ≤10 28---37 0.60 ≤ 8 ＞85 ＞25 4 1/3 coking coal ≤8.5 28--37 ≤0.60 ≤ 8 ＞75 ≤25 5 Main coking coal ≤9 20-28 ≤1.2 ≤8 ≥75 ≤25 6 Lean coal ≤10 10--20 ≤0.5 ≤ 8 20---50 7 Lean coal ≤10 10---20 ≤0.5 ≤ 8 ≥10 Ash volatile sulfur water-bonded colloid quality standard (coal for first-class coking) Index Fat coal, lean gas coal, main coking coal ash content ≤9.% <10.50% ≤9.0% <9.0% Volatile 28-32% <16% 32-39% <22% Sulfur ≤1.5% ≤0.4% ≤0.6% ≤0.5% G ≥13% 65-75% ≥85% Y ≥25mm ≥18% Moisture ≤8.0% ≤8.0% ≤8.0% ≤8.0%