A molding process of low-rank coal and briquettes produced by the process
A molding process and low-rank coal technology, which is applied in the petroleum industry, coking carbonaceous materials, special forms of dry distillation, etc., can solve the problems that cannot be used for coking, high safety risk, and complicated operation, so as to overcome spontaneous combustion and reduce the risk factor , Solve the effect of difficult operation
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Embodiment 1
[0027] The molding process of the low-rank coal described in the present embodiment comprises the following steps:
[0028] (1) Under the anaerobic condition of 107 ℃, lignite is dried until the water content of the lignite reaches 20wt%; the G value of the lignite is 0, the volatile content is 60%, and the particle size before drying is Not exceeding 6mm;
[0029] (2) After the dried lignite is naturally cooled to 30-40°C, mix it with the binder at a ratio of 9:1 to form a mixture, place the mixture in a hydraulic press, and keep the pressure at 20MPa for 1min. Cuboid briquettes; the binder is coal tar pitch with a softening point of 110°C, and its dry distillation weight loss at 850°C without air is 45%.
[0030] The briquette raw material prepared in this example is sent into a coke oven for coking treatment, the coking temperature is controlled at 950°C, the coking time is 16 hours, the overflowing crude gas and tar are collected, and coke is obtained at the same time; cr...
Embodiment 2
[0032] The molding process of the low-rank coal described in the present embodiment comprises the following steps:
[0033] (1) Dry the sub-bituminous coal under anaerobic conditions at 105°C until the water content of the sub-bituminous coal reaches 18wt%; the G value of the sub-bituminous coal is 0, the volatile content is 60%, and before drying The particle size does not exceed 6mm;
[0034] (2) After the dried sub-bituminous coal is cooled to 30°C-40°C, mix it with the binder at a ratio of 9:1 to form a mixture, place the mixture in a hydraulic press, and keep the pressure at 20MPa for 0.1min A cuboid-shaped briquette is obtained; the binder is petroleum pitch with a softening point of 120° C., and its dry distillation weight loss at 850° C. without air is 47%.
[0035] Push the briquette raw material prepared in this example into a coke oven for coking treatment, control the coking temperature to 950°C, and coking time to 16 hours, collect the overflowing crude gas and t...
Embodiment 3
[0037] The molding process of the low-rank coal described in the present embodiment comprises the following steps:
[0038] (1) Dry the sub-bituminous coal under anaerobic conditions at 110°C until the water content of the sub-bituminous coal reaches 15wt%; the G value of the sub-bituminous coal is 20, the volatile content is 40%, and before drying The particle size does not exceed 6mm;
[0039] (2) After the dried sub-bituminous coal is cooled to 30°C, the tool and the binder are mixed at a ratio of 4:1 to form a mixture, and then the mixture is placed in a hydraulic press, and the pressure is maintained at 30MPa for 2 minutes to obtain a cuboid Shaped coal; the binder is petroleum pitch with a softening point of 105° C., and its dry distillation weight loss at 850° C. without air is 40%.
[0040] Push the briquette raw material prepared in this example into a coke oven for coking treatment, control the coking temperature to 950°C, and coking time to 16 hours, collect the ov...
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Abstract
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