EP0019086A3 - Process for producing desulfurizing agents for pig iron or steel melts - Google Patents

Process for producing desulfurizing agents for pig iron or steel melts Download PDF

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Publication number
EP0019086A3
EP0019086A3 EP80101984A EP80101984A EP0019086A3 EP 0019086 A3 EP0019086 A3 EP 0019086A3 EP 80101984 A EP80101984 A EP 80101984A EP 80101984 A EP80101984 A EP 80101984A EP 0019086 A3 EP0019086 A3 EP 0019086A3
Authority
EP
European Patent Office
Prior art keywords
crushed
calcium oxide
steel melts
pig iron
cao
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP80101984A
Other languages
German (de)
Other versions
EP0019086A2 (en
EP0019086B1 (en
Inventor
Albert Braun
Willi Dr. Portz
Georg Dr. Strauss
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hoechst AG
Original Assignee
Hoechst AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6071196&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0019086(A3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Hoechst AG filed Critical Hoechst AG
Priority to AT80101984T priority Critical patent/ATE2092T1/en
Publication of EP0019086A2 publication Critical patent/EP0019086A2/en
Publication of EP0019086A3 publication Critical patent/EP0019086A3/en
Application granted granted Critical
Publication of EP0019086B1 publication Critical patent/EP0019086B1/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/02—Dephosphorising or desulfurising
    • C21C1/025—Agents used for dephosphorising or desulfurising
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/064—Dephosphorising; Desulfurising
    • C21C7/0645—Agents used for dephosphorising or desulfurising

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Coating With Molten Metal (AREA)

Abstract

The invention relates to the production of an agent for desulfurizing crude iron and steel melts, the desulfurizing agent being based on calcium carbide containing calcium oxide. To this end, a calcium carbide/calcium oxide/starting melt mixture with a CaO-content within the range 20 to 80 weight % is produced from lime and coke and allowed to solidify to a block. While the solidified block still has an average temperature of more than 400 DEG C., it is crushed to particulate material with a size of less than 150 mm. Next, the hot crushed material of at least 400 DEG C. is admixed with a quantity of calcium oxide necessary to have in the resulting mixture an overall content of CaO corresponding to that desired for the final product. The whole is thoroughly mixed and crushed with exclusion of moisture at temperatures higher than 100 DEG C. to particulate material with a size of less than 10 millimeters.
EP80101984A 1979-05-19 1980-04-14 Process for producing desulfurizing agents for pig iron or steel melts Expired EP0019086B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80101984T ATE2092T1 (en) 1979-05-19 1980-04-14 PROCESS FOR THE MANUFACTURE OF DESULPHURIZING AGENTS FOR MELTED PIG IRON OR STEEL.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2920353 1979-05-19
DE19792920353 DE2920353A1 (en) 1979-05-19 1979-05-19 METHOD FOR THE PRODUCTION OF DEHANIZING AGENTS FOR CRUDE IRON OR STEEL MELT

Publications (3)

Publication Number Publication Date
EP0019086A2 EP0019086A2 (en) 1980-11-26
EP0019086A3 true EP0019086A3 (en) 1981-04-01
EP0019086B1 EP0019086B1 (en) 1982-12-22

Family

ID=6071196

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80101984A Expired EP0019086B1 (en) 1979-05-19 1980-04-14 Process for producing desulfurizing agents for pig iron or steel melts

Country Status (9)

Country Link
US (1) US4318822A (en)
EP (1) EP0019086B1 (en)
JP (1) JPS55154519A (en)
AT (1) ATE2092T1 (en)
CA (1) CA1141965A (en)
DE (2) DE2920353A1 (en)
ES (1) ES491355A0 (en)
NO (1) NO151971C (en)
ZA (1) ZA802943B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2952686A1 (en) * 1979-12-29 1981-07-02 Hoechst Ag, 6230 Frankfurt METHOD FOR THE PRODUCTION OF DESULFURING AGENTS FOR BOD IRON OR STEEL MELT
DE3111510A1 (en) * 1981-03-24 1982-10-07 Hoechst Ag, 6000 Frankfurt DESULFURATION MIXTURE AND METHOD FOR THE PRODUCTION THEREOF
DE3111509A1 (en) * 1981-03-24 1982-10-07 Hoechst Ag, 6000 Frankfurt METHOD FOR THE PRODUCTION OF DESULFURING AGENTS FOR BOD IRON OR STEEL MELT
DE3535280A1 (en) * 1985-10-03 1987-04-09 Hoechst Ag DESULFURATION MIXTURE FOR METAL MELTS, A METHOD FOR THE PRODUCTION THEREOF AND ITS USE
US5002733A (en) * 1989-07-26 1991-03-26 American Alloys, Inc. Silicon alloys containing calcium and method of making same
US5397379A (en) * 1993-09-22 1995-03-14 Oglebay Norton Company Process and additive for the ladle refining of steel
US6179895B1 (en) 1996-12-11 2001-01-30 Performix Technologies, Ltd. Basic tundish flux composition for steelmaking processes
CN107344188A (en) * 2017-07-28 2017-11-14 靖西天桂铝业有限公司 Bauxite washing tail mud dry treatment and comprehensive utilization new technology

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT264560B (en) * 1966-08-25 1968-09-10 Gustav Dipl Ing Wolfram Basic steelmaking process
DE1935567B2 (en) * 1969-07-12 1971-05-13 Knapsack AG, 5033 Hurth Knapsack PROCESS FOR THE PRODUCTION OF CALCIUM CARBIDE OF CERTAIN QUALITY
DE2326539B2 (en) * 1973-05-24 1975-03-27 Sueddeutsche Kalkstickstoff-Werke Ag, 8223 Trostberg Process for the production of a desulphurisation mixture for iron melts from calcium carbide and at least one water-containing substance
DE1919414B2 (en) * 1969-04-17 1977-07-14 Hoechst Ag, 6000 Frankfurt METHOD AND DEVICE FOR COOLING CALCIUM CARBIDE PICKED IN VESSELS
DE2037758C3 (en) * 1970-07-30 1979-08-02 Hoechst Ag, 6000 Frankfurt Process for the production of calcium carbide for the desulfurization of metal melts

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2290240A1 (en) * 1974-11-06 1976-06-04 Unibra Sa IMPROVEMENTS IN GAS DESULFURATION
DE2919324A1 (en) * 1979-05-14 1980-12-04 Hoechst Ag DEHANIZER FOR RAW IRON AND STEEL MELTING AND A METHOD FOR THE PRODUCTION THEREOF

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT264560B (en) * 1966-08-25 1968-09-10 Gustav Dipl Ing Wolfram Basic steelmaking process
DE1919414B2 (en) * 1969-04-17 1977-07-14 Hoechst Ag, 6000 Frankfurt METHOD AND DEVICE FOR COOLING CALCIUM CARBIDE PICKED IN VESSELS
DE1935567B2 (en) * 1969-07-12 1971-05-13 Knapsack AG, 5033 Hurth Knapsack PROCESS FOR THE PRODUCTION OF CALCIUM CARBIDE OF CERTAIN QUALITY
DE2037758C3 (en) * 1970-07-30 1979-08-02 Hoechst Ag, 6000 Frankfurt Process for the production of calcium carbide for the desulfurization of metal melts
DE2326539B2 (en) * 1973-05-24 1975-03-27 Sueddeutsche Kalkstickstoff-Werke Ag, 8223 Trostberg Process for the production of a desulphurisation mixture for iron melts from calcium carbide and at least one water-containing substance

Also Published As

Publication number Publication date
NO801468L (en) 1980-11-20
ES8101120A1 (en) 1980-12-16
US4318822A (en) 1982-03-09
JPS6353245B2 (en) 1988-10-21
CA1141965A (en) 1983-03-01
DE2920353A1 (en) 1980-11-27
DE3061404D1 (en) 1983-01-27
JPS55154519A (en) 1980-12-02
ES491355A0 (en) 1980-12-16
NO151971B (en) 1985-04-01
EP0019086A2 (en) 1980-11-26
ATE2092T1 (en) 1983-01-15
ZA802943B (en) 1981-06-24
NO151971C (en) 1985-07-10
EP0019086B1 (en) 1982-12-22

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DE3061404D1 (en) Process for producing desulfurizing agents for pig iron or steel melts
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DE3069043D1 (en) Process for producing desulfurizing agents for pig iron or steel melts
DE3260809D1 (en) Process for producing desulfurizing agents for pig iron or steel melts
ES2027717T3 (en) PROCEDURE AND INSTALLATION FOR THE MANUFACTURE OF HOT PRODUCTION BRIQUETTES, EXEMPTED FROM BINDING AGENT.

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