FIELD: solid fuels. SUBSTANCE: invention is concerned with technology of briquetting fuel for domestic and industrial hearths and for coking. In one of the methods, carbon-containing fuel (5-30% of its total amount) is ground together with 1% (on total fuel weight) of tall pitch or oil bitumen to minus 6 mm. Remaining fuel (70-95%) is then added to ground material under stirring and resultant blend is further stirred with at least 0.5 wt % of sulfonic acid derivative or molasses at 60 to 160 C until melting of tall pitch or oil bitumen, after which blend is briquetted under at least 5 MPa pressure. In another embodiment of process, carbon-containing fuel is stirred with 6-14 wt % of a mixture consisting of 20-50 wt % oil bitumen or tall pitch and 50-80 wt % of aqueous solution of sulfonic acid derivative or molasses at 10-35 C and then at 60-160 C until melting of tall pitch or oil bitumen. After that, blend is briquetted under pressure as high as 50 MPa. EFFECT: improved strength of briquets (after wetting) and reduced their cost. 3 cl, 2 tbl, 8 ex
Authors
Dates
1998-09-27—Published
1997-05-15—Filed