Method of coal blending for coking by steam coal pretreatment
A coal blending coking and thermal coal technology, applied in the field of metallurgical coke, can solve the problems of low volatile matter, reducing coke coldness, hot peptide strength, coke lumpiness, poor colloid fusion ability, etc.
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[0014] Example
[0015] The process flow chart of the invention: steam coal→low temperature dry distillation→crushing→mixing with other coking coals in proportion→coking.
[0016] Operation steps of this method:
[0017] 1) The choice of thermal coal is lignite or long flame coal or weakly sticky or non-sticky coal;
[0018] 2) Dry distillation of steam coal: put steam coal in the furnace at 550°C for dry distillation, when the volatile content Vdaf is 20%, then grind it to 0.95mm with a grid ball mill (¢2700*3600), for use;
[0019] 3) Coal blending: mix dry distillation steam coal and coking coal at a weight percentage of 0.05-0.08:1, and charge the furnace for coking;
[0020] Among them, mixed coal blending: dry distillation steam coal is mixed with other coking coals at a proportion of 5%, and then loaded into the furnace for coking; the coking coals selected are: coking coal, fat coal, gas coal, gas fat coal, and 1 / 3 coking coal;
[0021] Among them, single mixed coal...
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