KR950017015A - Method for producing Fe powder from pickling waste acid - Google Patents

Method for producing Fe powder from pickling waste acid Download PDF

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Publication number
KR950017015A
KR950017015A KR1019930029965A KR930029965A KR950017015A KR 950017015 A KR950017015 A KR 950017015A KR 1019930029965 A KR1019930029965 A KR 1019930029965A KR 930029965 A KR930029965 A KR 930029965A KR 950017015 A KR950017015 A KR 950017015A
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KR
South Korea
Prior art keywords
waste acid
powder
acid
producing
mol
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Application number
KR1019930029965A
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Korean (ko)
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KR950008689B1 (en
Inventor
이재영
손진군
윤태식
Original Assignee
조말수
포항종합제철 주식회사
백덕현
재단법인산업과학기술연구소
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Priority to KR1019930029965A priority Critical patent/KR950008689B1/en
Publication of KR950017015A publication Critical patent/KR950017015A/en
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Publication of KR950008689B1 publication Critical patent/KR950008689B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F2009/001—Making metallic powder or suspensions thereof from scrap particles

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  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)

Abstract

본 발명은 제철소 냉연공장에서 발생하는 산세폐산에 Fe 스크랩을 투여하여 폐산내의 Fe+3및 HCl을 제거하고, 이 정제된 폐산에 옥살산을 당량비로 첨가하여 10-50℃의 온도에서 FeCl2및 옥살산의 농도를 1몰/ℓ이하, 바람직하게는 0.5몰/ℓ이하로 조절하여 평균입도 10㎛이하의 Fe(CO2)2·2H2O를 생성시키고, 이 생성된 Fe(CO2)2·2H2O를 대기 또는 수소분위기에서 열처리하여 각각 α-Fe2O3또는 Fe분말을 합성하는, 제철소 산세 폐산산으로부터 Fe계 분말을 제조하는 방법에 관한 것으로서, 이 방법에 의하여 제조된 Fe계 분말은 입도분포가 균일하고 입자가 미세하고, 또 이 방법은 폐산을 사용하는 것이므로 경제성이 뛰어나다.The present invention is to remove the Fe + 3 and HCl in the waste acid by administering Fe scrap to the pickling waste acid generated in the cold rolling mill of ironworks, oxalic acid is added to the purified waste acid in an equivalent ratio to FeCl 2 and oxalic acid at a temperature of 10-50 ℃ Is adjusted to 1 mol / l or less, preferably 0.5 mol / l or less to produce Fe (CO 2 ) 2 .2H 2 O having an average particle size of 10 μm or less, and the resulting Fe (CO 2 ) 2 · The present invention relates to a method for producing Fe-based powder from iron pickling waste acid, which synthesizes α-Fe 2 O 3 or Fe powder by heat-treating 2H 2 O in an air or hydrogen atmosphere. The silver particle size distribution is uniform, the particles are fine, and this method uses waste acid, so the economy is excellent.

Description

산세폐산으로부터 Fe계 분말을 제조하는 방법.Method for producing Fe-based powder from pickling waste acid.

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

Claims (5)

산세폐산에 Fe 스크랩을 투여하여 폐산을 정제시키는 공정 ; 이 정제된 폐산에 옥살산을 첨가ㆍ교반 처리하고 또 여과시켜 Fe(CO2)2ㆍ2H2O 분말을 생성시키는 공정 ; 및 이 분말을 수소분위기 하에서 400℃ 이상으로 열처리하여 Fe분말을 제조하는 공정을 포함하는 산세 폐산으로 부터 Fe계 분말을 제조하는 방법.Administering Fe scrap to pickling waste acid to purify the waste acid; Oxalic acid is added to the purified waste acid, stirred and filtered to form Fe (CO 2 ) 2 ㆍ 2H 2 O powder; And heat-treating the powder at 400 ° C. or higher under a hydrogen atmosphere to produce an Fe powder. 산세폐산에 Fe 스크랩을 투시하여 폐산을 정제시키는 공정 ; 이 정제된 폐산에 옥살산을 첨가ㆍ교반 처리하고 또 여과시켜 Fe(CO2)2ㆍ2H2O 분말을 생성시키는 공정 ; 및 이 분말을 대기중에서 500℃ 이상으로 열처리하여 α-Fe2O3분말을 제조하는 공정을 포함하는 산세 폐산으로 부터 Fe계 분말을 제조하는 방법.Purifying waste acid by throwing Fe scrap into pickling waste acid; Oxalic acid is added to the purified waste acid, stirred and filtered to form Fe (CO 2 ) 2 ㆍ 2H 2 O powder; And a step of producing the α-Fe 2 O 3 powder by heat-treating the powder at 500 ° C. or higher in the air. 제1항또는 제2항에 있어서, 폐산을 정제함에 있어서 산세폐간에 Fe 스크랩을 투여하여 폐산내의 Fe+3가 0.01몰/ℓ 이하, HCl이 0.1몰/ℓ이하가 되도록 하는 산세폐산으로 부터 Fe계 분말을 제조하는 방법.The method according to claim 1 or 2, wherein in the purification of the waste acid, Fe scraps are applied between the pickling wastes so that Fe +3 in the waste acid is 0.01 mol / l or less and HCl is 0.1 mol / l or less. Method for producing a system powder. 제1항 또는 제2항에 있어서, 정제된 폐산의 FeCl2농도가 0.1-1몰/ℓ가 되도록하고, 이 폐산에 0.1-1몰/ℓ의 옥살산을 당량비로 첨가하여 교반처리하는 산세폐산으로부터 Fe계 분말을 제조하는 방법.3. The pickled waste acid according to claim 1 or 2, wherein the concentration of FeCl 2 in the purified waste acid is 0.1-1 mol / l, and 0.1-1 mol / l oxalic acid is added to the waste acid in an equivalence ratio and stirred. Method for producing Fe-based powder. 제1항 또는 제2항에 있어서, 정제된 폐산에 옥살산을 첨가교반 처리하는 공정에 있어서의 반응온도가 10-50℃가 되도록 하는 산세폐산으로 부터 Fe계 분말을 제조하는 방법.The process for producing an Fe-based powder from pickling waste acid according to claim 1 or 2, wherein the reaction temperature in the step of adding and stirring oxalic acid to the purified waste acid is 10-50 占 폚. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930029965A 1993-12-27 1993-12-27 Method of fe powder from pickling waste liquid KR950008689B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930029965A KR950008689B1 (en) 1993-12-27 1993-12-27 Method of fe powder from pickling waste liquid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930029965A KR950008689B1 (en) 1993-12-27 1993-12-27 Method of fe powder from pickling waste liquid

Publications (2)

Publication Number Publication Date
KR950017015A true KR950017015A (en) 1995-07-20
KR950008689B1 KR950008689B1 (en) 1995-08-04

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KR1019930029965A KR950008689B1 (en) 1993-12-27 1993-12-27 Method of fe powder from pickling waste liquid

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KR950008689B1 (en) 1995-08-04

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