JPS55119118A - Denitrification method for iron alloy containing chromium - Google Patents

Denitrification method for iron alloy containing chromium

Info

Publication number
JPS55119118A
JPS55119118A JP2664979A JP2664979A JPS55119118A JP S55119118 A JPS55119118 A JP S55119118A JP 2664979 A JP2664979 A JP 2664979A JP 2664979 A JP2664979 A JP 2664979A JP S55119118 A JPS55119118 A JP S55119118A
Authority
JP
Japan
Prior art keywords
iron
iron alloy
denitrification
metal compound
alloy containing
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
JP2664979A
Other languages
Japanese (ja)
Other versions
JPS5717923B2 (en
Inventor
Shigeaki Maruhashi
Morihiro Hasegawa
Takashi Yamauchi
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.)
Nippon Steel Nisshin Co Ltd
Original Assignee
Nisshin Steel Co Ltd
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 Nisshin Steel Co Ltd filed Critical Nisshin Steel Co Ltd
Priority to JP2664979A priority Critical patent/JPS55119118A/en
Publication of JPS55119118A publication Critical patent/JPS55119118A/en
Publication of JPS5717923B2 publication Critical patent/JPS5717923B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

PURPOSE: To improve rate and workability of denitrification by a method wherein the concentration of carbon in an iron alloy containing molten chromium is specified, and the alloy is contacted with slug containing an alkali metal compound, an alkaline earth metal compound, an iron oxide, a nickel oxide, etc.
CONSTITUTION: The concentration of carbon in an iron alloy containing 3% or more of chromium is adjusted to 2% or more. The iron alloy is contacted with slug containing 1W30% of at least one (for example, CaO) of a carbonate, an oxide and a hydroxide of alkali metals, 30W70% of at least one (for example, CaF2) of a fluoride and a chloride of alkaline earth metals, 1W50% of at least one of oxides of iron and nickel, etc. at approximate 1500°C or higher in an amount of approximate 5W80kg per 1 ton of molten iron. According to this method, the loss by evaporation of the alkali metal compound is reduced as well as the cost of the slug. The formation of fumes and dust is decreased, denitrification rate is increased and denitrification products are easily separated.
COPYRIGHT: (C)1980,JPO&Japio
JP2664979A 1979-03-09 1979-03-09 Denitrification method for iron alloy containing chromium Granted JPS55119118A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2664979A JPS55119118A (en) 1979-03-09 1979-03-09 Denitrification method for iron alloy containing chromium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2664979A JPS55119118A (en) 1979-03-09 1979-03-09 Denitrification method for iron alloy containing chromium

Publications (2)

Publication Number Publication Date
JPS55119118A true JPS55119118A (en) 1980-09-12
JPS5717923B2 JPS5717923B2 (en) 1982-04-14

Family

ID=12199278

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2664979A Granted JPS55119118A (en) 1979-03-09 1979-03-09 Denitrification method for iron alloy containing chromium

Country Status (1)

Country Link
JP (1) JPS55119118A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5877518A (en) * 1981-11-04 1983-05-10 Nippon Yakin Kogyo Co Ltd Manufacture of extra-low sulfur stainless steel with cao-li2o flux
JPS61264116A (en) * 1985-05-17 1986-11-22 Nippon Kokan Kk <Nkk> Method for denitrifying molten pig iron

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112017000085T5 (en) * 2017-07-14 2019-04-18 Komatsu Ltd. WORK MACHINE AND CONTROL PROCESS FOR WORK MACHINE
JP7232691B2 (en) 2019-03-29 2023-03-03 株式会社小松製作所 Work machine and work machine control method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5877518A (en) * 1981-11-04 1983-05-10 Nippon Yakin Kogyo Co Ltd Manufacture of extra-low sulfur stainless steel with cao-li2o flux
JPH0151525B2 (en) * 1981-11-04 1989-11-06 Nippon Yakin Kogyo Co Ltd
JPS61264116A (en) * 1985-05-17 1986-11-22 Nippon Kokan Kk <Nkk> Method for denitrifying molten pig iron

Also Published As

Publication number Publication date
JPS5717923B2 (en) 1982-04-14

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