Boliden Aktiebolag

Per A Fahlstrom

Karl Goran Gorling

Erik G Back

Sten C Svemar

Bruno C Wallsten

Method of recovering high-grade fuel from solid mineral-fuel raw material

The invention relates to a method in the gasification of sulphur-containing carbonaceous material using metal smelts. When gasifying such carbonaceous material in a metal smelt, the material is introduced to a gasifying reactor containing an iron and/or manganese smelt having a temperature of between 1100.degree. and 1600.degree. C., suitably 1150.degree.-1250.degree. C., the smelt being substantially saturated with respect to sulphur and carbon. The carbonaceous material is oxidized to carbon monoxide and the sulphur content forms a matte phase containing a high percentage of sulphur, which phase is tapped off. Residual non-combustible material is collected as a slag on the surface and is removed together therewith. If so desired, the matte can be granulated and roasted to recover the sulphur and metal contents. Carbonaceous material incorporating pyrolysible constituents is suitably pyrolysed in a pyrolysis medium at a temperature of between 450.degree.-800.degree. C. prior to the gasification reaction, the temperature during the pyrolysis process being maintained, by circulating the pyrolysis medium between pyrolysis and gasification and optional combustion of carbon monoxide gas formed.

Method for removing sulphur in conjunction with the gasification of

Method for recovering oil and/or gas from carbonaceous materials

Kerogen-containing shale is crushed and comminuted to a fineness sufficient to free kerogen and any sulphides present in said shale. To enable the shale to be finely-divided more readily, the crushed shale is subjected to a leaching treatment prior to final comminution thereof.

Method of treating shales

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.ANG.kersberga, Sweden

Per A Fahlstrom