FR2146900A1 - Decarburising chrome steels by blowing with diluted carbon - monoxide through double/triple feed tuyeres - Google Patents

Decarburising chrome steels by blowing with diluted carbon - monoxide through double/triple feed tuyeres

Info

Publication number
FR2146900A1
FR2146900A1 FR7127015A FR7127015A FR2146900A1 FR 2146900 A1 FR2146900 A1 FR 2146900A1 FR 7127015 A FR7127015 A FR 7127015A FR 7127015 A FR7127015 A FR 7127015A FR 2146900 A1 FR2146900 A1 FR 2146900A1
Authority
FR
France
Prior art keywords
double
carbon
tuyeres
decarburising
blowing
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
FR7127015A
Other languages
French (fr)
Other versions
FR2146900B1 (en
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.)
Creusot Loire SA
Original Assignee
Creusot Loire SA
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
Application filed by Creusot Loire SA filed Critical Creusot Loire SA
Priority to FR7127015A priority Critical patent/FR2146900A1/en
Priority to BE781241A priority patent/BE781241A/en
Priority to LU65052D priority patent/LU65052A1/xx
Priority to DE19722215435 priority patent/DE2215435B2/en
Priority to IT68042/72A priority patent/IT954593B/en
Priority to ES401691A priority patent/ES401691A1/en
Priority to US00247315A priority patent/US3844768A/en
Priority to GB1914972A priority patent/GB1354853A/en
Priority to AU41733/72A priority patent/AU467460B2/en
Priority to CA143,359A priority patent/CA971755A/en
Priority to JP47053296A priority patent/JPS5147133B1/ja
Priority to JP48014562A priority patent/JPS50110923A/ja
Publication of FR2146900A1 publication Critical patent/FR2146900A1/en
Priority to CA180,256A priority patent/CA983721A/en
Application granted granted Critical
Publication of FR2146900B1 publication Critical patent/FR2146900B1/fr
Granted 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
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/005—Manufacture of stainless steel
    • 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
    • C21C7/068—Decarburising
    • C21C7/0685—Decarburising of stainless steel

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

Process for decarburising chrome steels esp. stainless steels by blowing the melt with diluted carbon monoxide from tuyeres having double or triple feed. The triple feed comprises an oxidising stream at the centre, a dilutant fed around it and a carbon bearing fluid at the periphery. In the double feed the oxidant and the dilutant are combined. The oxidising stream is industrially pure O2 or a gas contg. O2. The diluent is a neutral gas, argon, steam, etc. The carbon contg. fluid is fuel oil or a mixt of fuel oil/argon/steam. The fuel oil/oxygen wt. ratio is 1-10% but pref. 2.5-4%. The steel may be vacuum decarburised or decarburised under reduced pressure. By means of separate feeds the CO dilution can be controlled as well as the wear on the tuyeres by controlling the carbon contg. fluid flow.
FR7127015A 1971-05-28 1971-07-23 Decarburising chrome steels by blowing with diluted carbon - monoxide through double/triple feed tuyeres Granted FR2146900A1 (en)

Priority Applications (13)

Application Number Priority Date Filing Date Title
FR7127015A FR2146900A1 (en) 1971-07-23 1971-07-23 Decarburising chrome steels by blowing with diluted carbon - monoxide through double/triple feed tuyeres
BE781241A BE781241A (en) 1971-05-28 1972-03-24 REFINING PROCESS FOR ALLIED STEELS CONTAINING CHROME AND MORE SPECIFICALLY STAINLESS STEELS
LU65052D LU65052A1 (en) 1971-05-28 1972-03-27
DE19722215435 DE2215435B2 (en) 1971-05-28 1972-03-29 PROCESS FOR MANUFACTURING CHROME CONTAINING STEEL ALLOYS, IN PARTICULAR STAINLESS STEELS
IT68042/72A IT954593B (en) 1971-05-28 1972-04-01 REFINING PROCESS OF ALLOY STEELS CONTAINING CHROME AND MORE ESPECIALLY OF STAINLESS STEELS
ES401691A ES401691A1 (en) 1971-05-28 1972-04-12 Affinal procedure of alloy steels containing chrome. (Machine-translation by Google Translate, not legally binding)
US00247315A US3844768A (en) 1971-05-28 1972-04-25 Process for refining alloy steels containing chromium and including stainless steels
GB1914972A GB1354853A (en) 1971-05-28 1972-04-25 Decarburisation of alloy steels
AU41733/72A AU467460B2 (en) 1971-05-28 1972-05-01 Process for refining alloy steels containing chromium
CA143,359A CA971755A (en) 1971-05-28 1972-05-26 Procede d'affinage des aciers allies contenant du chrome
JP47053296A JPS5147133B1 (en) 1971-05-28 1972-05-29
JP48014562A JPS50110923A (en) 1971-05-28 1973-02-05
CA180,256A CA983721A (en) 1971-05-28 1973-09-04 Procede d'affinage des fontes et aciers contenant du chrome

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7127015A FR2146900A1 (en) 1971-07-23 1971-07-23 Decarburising chrome steels by blowing with diluted carbon - monoxide through double/triple feed tuyeres

Publications (2)

Publication Number Publication Date
FR2146900A1 true FR2146900A1 (en) 1973-03-09
FR2146900B1 FR2146900B1 (en) 1974-07-05

Family

ID=9080809

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7127015A Granted FR2146900A1 (en) 1971-05-28 1971-07-23 Decarburising chrome steels by blowing with diluted carbon - monoxide through double/triple feed tuyeres

Country Status (1)

Country Link
FR (1) FR2146900A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2385467A1 (en) * 1977-03-31 1978-10-27 Union Carbide Corp PROCESS FOR THE PRODUCTION OF FINISHED MOLDED PARTS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2385467A1 (en) * 1977-03-31 1978-10-27 Union Carbide Corp PROCESS FOR THE PRODUCTION OF FINISHED MOLDED PARTS

Also Published As

Publication number Publication date
FR2146900B1 (en) 1974-07-05

Similar Documents

Publication Publication Date Title
GB1283086A (en) Improvements in or relating to decarburization of steel
ES409623A1 (en) Burner for the partial oxidation of hydrocarbons to synthesis gas
CA2123711A1 (en) Method and Apparatus for the Selective Oxidation of Carbon Monoxide in a Hydrogen-Containing Gas Mixture
GB496880A (en) Improvements in the manufacture and production of valuable hydrocarbons and their derivatives containing oxygen from carbon monoxide and hydrogen
FR2139642A1 (en) Decarburising chrome steels by blowing with diluted carbon - monoxide through double/triple feed tuyeres
FR2146900A1 (en) Decarburising chrome steels by blowing with diluted carbon - monoxide through double/triple feed tuyeres
KR930019564A (en) Wet oxidation of liquids containing ammonium salts
FR2173717A2 (en) Decarburising chrome steels by blowing with diluted carbon - monoxide through double/triple feed tuyeres
FR2147795A1 (en) Decarburising chrome steels by blowing with diluted carbon - monoxide through double/triple feed tuyeres
ES406431A1 (en) Metallurgical process
GB1407618A (en) Manufacture of nitric acid
GB753727A (en) Process for the production of cumene hydroperoxide
FR2158140A1 (en) Steel making - by top and bottom blowing oxygen with a fluid contg hydrocarbons
GB1467123A (en) Process of gasification of hydrocarbons
GB1511768A (en) Preparation of unsaturated carboxylic acids from the corresponding aldehydes
JPS61136901A (en) Burner for partially oxidizing heavy hydrocarbon and oxidation thereof
FR2186974A5 (en) Decarburisation of iron and steel alloys - contg chromium by blowing with oxygen, carbon dioxide and a rare gas
JPS5269812A (en) Preparation of ultra low carbon high cr steel
GB944479A (en) Process for refining pig iron of high phosphorus content
Yaji et al. Production of Ultra-Low-Carbon Steel by Combined Blowing
FR2123212A1 (en) Refinement and alloying of steel - in one furnace as one sequence of operations esp for stainless steel
GB858404A (en) A method of lowering the carbon content of chromium-bearing steels
GB1459979A (en) Process for producing beta-isopropyl naphthalene hydroperoxide
BE762142A (en) Furnace conditions and tuyeres for thomasbot
GB1394240A (en) Refining of metals