PRODUCTION OF CALCIUM CARBIDE
    33.
    发明专利

    公开(公告)号:ZA8003816B

    公开(公告)日:1981-07-29

    申请号:ZA8003816

    申请日:1980-06-26

    CPC classification number: C01B32/942 Y02P20/129

    Abstract: 1. Process for the production of calcium carbide by reacting coke with lime in the presence of oxygen in an oxygen-thermal furnace, characterized in that lignite with a particle size of up to 150 mm is cokefied in a hearth furnace at off-gas temperatures of at least 7508c, the coke so obtained with an inherent temperature of more than 5008C is directly introduced into the oxygen-thermal furnace process, and calcium carbide is produced in the oxygen-thermal furnace with addition of lime and oxygen.

    PROCESS AND APPARATUS FOR CALCINING PELLETSHAPED CALCIUM HYDROXIDE

    公开(公告)号:IN141238B

    公开(公告)日:1977-02-05

    申请号:IN211CA1975

    申请日:1975-02-04

    Applicant: HOECHST AG

    Abstract: Pellet-shaped calcium hydroxide forming part of the mixture of flux and ores in electrothermal calcium carbide furnaces is calcined. The pellets are made by granulating or briquetting moist calcium hydroxide, delivered to a sintering grate and conveyed thereon through a heating zone, wherein high temperatures are produced by the combustion of gas, above the grate, and wherein the combustion gas is exhausted, below the grate. The calcium hydroxide pellets are more especially placed on to the grate, covered with a layer of broken limestone and the undried pellets are directly conveyed through the heating zone, in an apparatus for carrying out the process.

    PROCESS AND APPARATUS FOR CALCINING PELLET-SHAPED CALCIUM HYDROXIDE

    公开(公告)号:ZA75704B

    公开(公告)日:1976-01-28

    申请号:ZA75704

    申请日:1975-02-04

    Applicant: HOECHST AG

    Abstract: Pellet-shaped calcium hydroxide forming part of the mixture of flux and ores in electrothermal calcium carbide furnaces is calcined. The pellets are made by granulating or briquetting moist calcium hydroxide, delivered to a sintering grate and conveyed thereon through a heating zone, wherein high temperatures are produced by the combustion of gas, above the grate, and wherein the combustion gas is exhausted, below the grate. The calcium hydroxide pellets are more especially placed on to the grate, covered with a layer of broken limestone and the undried pellets are directly conveyed through the heating zone, in an apparatus for carrying out the process.

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