Sumitomo Metal Industries, Inc.

Sumikin Coke Company Limited

Kunihiko Nishioka

Yoshihiko Sunami

Michio Tsuyuguchi

Yoshio Kiritani

Keiichi Sasaki

Katsuhiro Yano

Tetsuo Ibaragi

Tsukasa Chikata

A process of producing a solvent useful in coal liquefaction which includes separating the heavy liquid produced from the liquefaction of coal into a fraction boiling at 200.degree. to 210.degree. C., a fraction boiling at 211.degree. to 230.degree. C., and a fraction boiling at not less than 231.degree. subjecting the fraction boiling at 211.degree. to 230.degree. C. to a hydrogenation treatment to produce a hydrogenated fraction, mixing the hydrogenated fraction with the fraction boiling at 200.degree. to 210.degree. C. to form a resultant mixture, and mixing a portion of the resultant mixture with a portion of the fraction boiling at not less than 231.degree. C. Alternately, the solvent is produced from the heavy liquid by separating it into a fraction boiling at 200.degree. C. to 210.degree. C., a fraction boiling at 211.degree. C. to 230.degree. C., a fraction boiling at 231.degree. C. to 250.degree. C., a fraction boiling at 251.degree. C. to 350.degree. C. and a fraction boiling at not less than 351.degree. C., subjecting each of the middle three fractions to a hydrogenation treatment to form three hydrogenated fractions, mixing the three hydrogenated fractions with the fraction boiling at 200.degree. C. to 210.degree. C. to form a resultant mixture, and mixing the resultant mixture with a portion of the fraction boiling at not less than 351.degree. C.

Process for manufacture of solvent for coal liquefaction

A solvent useful in coal liquefaction is obtained by separating the heavy liquid resulting from coal liquefaction into a fraction boiling at temperatures of between 200.degree. to 210.degree. C., a fraction boiling at temperatures between 211.degree. to 250.degree. C., and a fraction boiling at not less than 250.degree. C., subjecting the fraction boiling at between 211.degree. C. to 250.degree. C. to two hydrogenation treatments, mixing the hydrogenated product with the fraction boiling at between 200.degree. to 210.degree. C. which optionally has been hydrogenated to form a resultant mixture and mixing a portion of the resultant mixture with the fraction boiling at not less than 250.degree. C. which has been optionally hydrogenated.

An impregnated carbonaceous material which can be mixed with basic coal to form a mixture which, once roasted, forms an effective shaft furnace coke. The impregnated carbonaceous material is formed by finely crushing an inert carbonaceous material such as powdered coke, coal gasification char, coal liquifaction residue coal, oil coke, and semi-dry-distilled char, and mixing and impregnating the crushed carbonaceous material with an aromatic pitch such as coal tar, coal tar pitch, asphalt, and pitch obtained by heat-treating or solvent extracting an asphalt. The mixing is conducted at a temperature above the aromatic pitch melting point. The impregnated carbonaceous material contains preferably 50 to 95 parts by weight of crushed inert carbonaceous material and 5 to 50 parts by weight aromatic pitch.

Process for producing shaft furnace cokes

A method of manufacturing blast furnace coke wherein said coke is obtained by a process in which coal to be used for making briquettes is mixed with a caking substance having a softening point of 40.degree.-250.degree. C. with or without a solvent having fluidity at the mixing temperature and dissolvable to said caking substance, the resultant mixture being mixed by means of a powerful mixer capable of applying mixing energy of 0.01KW/Kg or more at a temperature of 40.degree.-250.degree. C. for 1-10 minutes, while a heating medium such as steam is passed therethrough and is then subjected to briquetting with a roll press. The briquette obtained is either carbonized directly or after blending with coal ready for coke oven charging.

Method of manufacturing blast furnace coke

A process for preparing a briquette is disclosed. The process comprises a coal with a caking substance having a softening point of 20.degree.-40.degree. C. or with a caking substance having a softening point of above 40.degree. C. and a solvent which has fluidity at normal temperature and is compatible with the caking substance to a coal for making briquettes, powerfully mixing at a temperature of above 10.degree. C., preferably of 20.degree.-50.degree. C., for 1-10 minutes, by using a mixer provided with a mixing tool which is rotated at a speed of more than 5m/sec. peripheral velocity and/or a mixer provided with a mixing tool which applies a pressure of more than 45kg/cm.sup.2 ; and briquetting by using a roll press, whereby a briquette is obtained having a shutter strength of more than 80 and a trommel strength of more than 90.

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Amagasaki, Japan

Kunihiko Nishioka