METHOD FOR PRODUCING FUEL BRIQUETTES Russian patent published in 2021 - IPC C10L5/10 C10L5/14 C10L5/26 C10L5/30 

FIELD: fuel production.

SUBSTANCE: method for producing a solid fuel briquette from coal by treating small particles with a binder containing a solution of polyvinyl alcohol includes following steps: small coal particles are impregnated with a 10% aqueous solution of polyvinyl alcohol, briquetting is carried out under a pressure of 100-150 MPa, then the briquette is frozen at a temperature of minus 20ºC for 20 hours, then it is defrosted at room temperature and dried to a constant mass, in which the content of coal particles is 99-99.5% wt., polyvinyl alcohol is 0.5-1% wt.

EFFECT: increase in the environmental friendliness of the fuel due to the absence of waste oil products and reduction of the amount of binder while maintaining the mechanical strength and calorific value of the briquettes.

1 cl, 1 tbl, 8 ex