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    1.
    发明专利
    未知

    公开(公告)号：DD292478A5

    公开(公告)日：1991-08-01

    申请号：DD33855790

    申请日：1990-03-09

    Applicant: HOECHST AG

    Inventor： SCHROEDTER HERMANN ,  BRAUN ALBERT ,  SCHOLZ HARALD

    IPC: C21C1/02 ,  C21C7/064

    Abstract: An agent for desulfurizing molten metals, in particular molten iron, comprises a CaC2/CaO crystal blend with a maximum of 62% by weight of CaC2, gas-evolving substances and 0 to 44% by weight of metallic magnesium as the components. For desulfurizing molten metals, in particular molten iron, using this agent, either the mixture comprising both the CaC2/CaO crystal blend and gas-evolving substances, and the magnesium, are fluidized separately and the two fluidized products are combined immediately before they enter the melt, or the CaC2/CaO crystal blend, gas-evolving substances and magnesium components are fluidized together and the fluidized product is introduced into the melt.

    2.
    发明专利
    未知

    公开(公告)号：PT93412A

    公开(公告)日：1990-11-07

    申请号：PT9341290

    申请日：1990-03-12

    Applicant: HOECHST AG

    Inventor： SCHRODTER HERMANN ,  BRAUN ALBERT ,  SCHOLZ HARALD

    IPC: C21C1/02 ,  C01B17/00 ,  C22B61/00

    Abstract: An agent for desulfurizing molten metals, in particular molten iron, comprises a CaC2/CaO crystal blend with a maximum of 62% by weight of CaC2, gas-evolving substances and 0 to 44% by weight of metallic magnesium as the components. For desulfurizing molten metals, in particular molten iron, using this agent, either the mixture comprising both the CaC2/CaO crystal blend and gas-evolving substances, and the magnesium, are fluidized separately and the two fluidized products are combined immediately before they enter the melt, or the CaC2/CaO crystal blend, gas-evolving substances and magnesium components are fluidized together and the fluidized product is introduced into the melt.

    3.
    发明专利
    未知

    公开(公告)号：DE3908071A1

    公开(公告)日：1990-09-20

    申请号：DE3908071

    申请日：1989-03-13

    Applicant: HOECHST AG

    Inventor： SCHROEDTER HERMANN DR ,  BRAUN ALBERT ,  SCHOLZ HARALD DR

    IPC: C21C1/02

    Abstract: An agent for desulfurizing molten metals, in particular molten iron, comprises a CaC2/CaO crystal blend with a maximum of 62% by weight of CaC2, gas-evolving substances and 0 to 44% by weight of metallic magnesium as the components. For desulfurizing molten metals, in particular molten iron, using this agent, either the mixture comprising both the CaC2/CaO crystal blend and gas-evolving substances, and the magnesium, are fluidized separately and the two fluidized products are combined immediately before they enter the melt, or the CaC2/CaO crystal blend, gas-evolving substances and magnesium components are fluidized together and the fluidized product is introduced into the melt.

    4.
    发明专利
    未知

    公开(公告)号：NO901142L

    公开(公告)日：1990-09-14

    申请号：NO901142

    申请日：1990-03-12

    Applicant: HOECHST AG

    Inventor： SCHROEDTER HERMANN ,  BRAUN ALBERT ,  SCHOLZ HARALD

    IPC: C21C1/02

    Abstract: An agent for desulfurizing molten metals, in particular molten iron, comprises a CaC2/CaO crystal blend with a maximum of 62% by weight of CaC2, gas-evolving substances and 0 to 44% by weight of metallic magnesium as the components. For desulfurizing molten metals, in particular molten iron, using this agent, either the mixture comprising both the CaC2/CaO crystal blend and gas-evolving substances, and the magnesium, are fluidized separately and the two fluidized products are combined immediately before they enter the melt, or the CaC2/CaO crystal blend, gas-evolving substances and magnesium components are fluidized together and the fluidized product is introduced into the melt.

    5.
    发明专利
    未知

    公开(公告)号：DK151570C

    公开(公告)日：1988-06-06

    申请号：DK550980

    申请日：1980-12-23

    Applicant: HOECHST AG ,  KRUPP STAHL AG

    Inventor： BRAUN ALBERT ,  PORTZ WILLI ,  STRAUSS GEORG ,  DELHEY HANS-MARTIN

    IPC: C21C1/02 ,  C21C7/064 ,  C21C7/076

    Abstract: The invention relates to agents for the desulfurization of metal melts, especially of steel and crude iron melts, based on mixtures of CaC2/CaO crystals produced in the fused mass. A portion of the CaO in the crystal mixture is hydrated to form Ca(OH)2. A process for the manufacture of these agents is also described.

    6.
    发明专利
    未知

    公开(公告)号：DK151569B

    公开(公告)日：1987-12-14

    申请号：DK550880

    申请日：1980-12-23

    Applicant: HOECHST AG ,  KRUPP STAHL AG

    Inventor： BRAUN ALBERT ,  PORTZ WILLI ,  STRAUSS GEORG ,  DELHEY HANS-MARTIN

    IPC: C01B32/942 ,  C21C1/02 ,  C21C7/064 ,  C21C7/076

    Abstract: The present invention relates to a process for the manufacture of desulfurizing agents containing 1-6% by weight of chemically bonded water, based on calcium oxide-containing calcium carbide, for crude iron and steel melts. To this end, a molten mixture of calcium carbide and calcium oxide with a CaO content of 20 to 80% by weight is produced, which is allowed to solidify into a block. Next, the block which still has an average temperature of more than 400 DEG C., is rough-crushed to particles with a size of less than 150 mm and calcium oxide is added to the comminuted mixture, which still has a temperature of at least 400 DEG C., in accordance with the CaO content desired in the end product. The mixture is finally ground in the presence of air or nitrogen with a moisture content of from 5 to 20 g/m3 (at 1.013 bar and 273.15 K) at temperatures below 100 DEG C. to particles with a size of less than 10 mm.

    7.
    发明专利
    未知

    公开(公告)号：NO153500B

    公开(公告)日：1985-12-23

    申请号：NO803924

    申请日：1980-12-23

    Applicant: HOECHST AG ,  KRUPP STAHL AG

    Inventor： BRAUN ALBERT ,  PORTZ WILLI ,  STRAUSS GEORG ,  DELHEY HANS-MARTIN

    IPC: C01B32/942 ,  C21C1/02 ,  C21C7/064 ,  C21C7/076 ,  C01B31/32

    Abstract: The present invention relates to a process for the manufacture of desulfurizing agents containing 1-6% by weight of chemically bonded water, based on calcium oxide-containing calcium carbide, for crude iron and steel melts. To this end, a molten mixture of calcium carbide and calcium oxide with a CaO content of 20 to 80% by weight is produced, which is allowed to solidify into a block. Next, the block which still has an average temperature of more than 400 DEG C., is rough-crushed to particles with a size of less than 150 mm and calcium oxide is added to the comminuted mixture, which still has a temperature of at least 400 DEG C., in accordance with the CaO content desired in the end product. The mixture is finally ground in the presence of air or nitrogen with a moisture content of from 5 to 20 g/m3 (at 1.013 bar and 273.15 K) at temperatures below 100 DEG C. to particles with a size of less than 10 mm.

    PROCESS FOR PRODUCING DESULFURIZING AGENTS FOR PIG IRON OR STEEL MELTS
    8.
    发明专利
    PROCESS FOR PRODUCING DESULFURIZING AGENTS FOR PIG IRON OR STEEL MELTS 未知

    公开(公告)号：DE3260809D1

    公开(公告)日：1984-10-31

    申请号：DE3260809

    申请日：1982-02-25

    Applicant: HOECHST AG ,  KRUPP STAHL AG

    Inventor： BRAUN ALBERT ,  PORTZ WILLI DR ,  STRAUSS GEORG DR ,  DELHEY HANS-MARTIN DIPL ING

    IPC: C21C1/02 ,  C21C7/064 ,  C21C7/076

    Abstract: The disclosure relates to a process for the manufacture of desulfurizing agents containing 1-6 weight % chemically combined water, based on calcium oxide and carbon-containing calcium carbide, for crude iron and steel melts. More particularly, the disclosure provides for a molten mixture of calcium carbide and calcium oxide containing 20 to 80 weight % CaO to be made from lime and coke; for the mixture to be allowed to cool and solidify into a block; for the solidified block while it still has an average temperature of more than 400 DEG C. to be crushed to particles with a size of less than 150 mm; for the comminuted mixture, which still has a temperature of at least 400 DEG C. to be admixed with a quantity of calcium oxide necessary to establish in the resulting mixture a total content of CaO corresponding to the CaO content desired in the end product; and for the mixture to be gound while intensively mixing it with free carbon and carbonate in the presence of air or nitrogen with a moisture content of 5 to 20 g/m3 (at 1.013 bar and 273.15 K.) at temperatures below 100 DEG C. to particles with a size of less than 10 mm.

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