METHOD FOR OBTAINING BRIQUETTED SOLID FUEL USING POROUS COAL AS RAW MATERIAL Russian patent published in 2013 - IPC C10L5/08 C10L9/10 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to the method for obtaining briquetted solid fuel, which can reduce the cost of briquetting at maintaining the strength of briquetted product. Mixed oil that contains heavy oil and oil-solvent, and porous coal having moisture content of 30 to 70 wt %, is mixed so that a suspension is obtained. Suspension is dehydrated by heating so that dehydrated suspension is obtained. Oil-solvent is extracted from dehydrated suspension so that the residue is obtained. The residue is heated, and oil-solvent is extracted in addition from the residue so that modified coal is obtained. Moisture is introduced to modified coal so that wet modified coal with moisture content of 3-10 wt % is obtained. At the stage of moisture introduction, crushed porous coal with moisture content of 30 to 70 wt % is mixed with modified coal. Then, wet modified coal is briquetted under pressure.

EFFECT: reduction of briquetting cost at maintaining the briquette strength.

2 cl, 3 dwg, 1 tbl, 1 ex