KR950003453A - Low density and fine particles of sponge powder - Google Patents

Low density and fine particles of sponge powder Download PDF

Info

Publication number
KR950003453A
KR950003453A KR1019930013558A KR930013558A KR950003453A KR 950003453 A KR950003453 A KR 950003453A KR 1019930013558 A KR1019930013558 A KR 1019930013558A KR 930013558 A KR930013558 A KR 930013558A KR 950003453 A KR950003453 A KR 950003453A
Authority
KR
South Korea
Prior art keywords
iron
oxide
particles
sludge
carbon
Prior art date
Application number
KR1019930013558A
Other languages
Korean (ko)
Other versions
KR950006268B1 (en
Inventor
반봉찬
Original Assignee
김미라
반봉찬
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 김미라, 반봉찬 filed Critical 김미라
Priority to KR1019930013558A priority Critical patent/KR950006268B1/en
Publication of KR950003453A publication Critical patent/KR950003453A/en
Application granted granted Critical
Publication of KR950006268B1 publication Critical patent/KR950006268B1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/02—Making ferrous alloys by powder metallurgy

Abstract

본 발명은 철산화물의 함량이 높은 산업폐기물인 슬러지와 분진을 원료로 하여 각종 저밀도 해면철분을 제조하는 것으로서 슬러지 및 분진은 분말상태이므로 종래의 해면철분 제조방법과 달리 철광석을 분쇄할 필요가 없게 되고 유해 불순물만 제거하고 나머지 산화물과 흑연성분등의 불순물을 제거하지 않고 직접 다양한 성질을 갖는 복합소재용 재료로 사용될 수 있는 해면철분을 얻을 수 있게 되므로 환경오염 방지, 자원의 재활용으로 인한 수입감소, 폐기물의 고부가 가치화가 가능한 발명인 것이다.The present invention is to produce various low-density sponge iron powder from sludge and dust, which is an industrial waste with high iron oxide content, and the sludge and dust are in a powder state, and thus, there is no need to crush iron ore unlike the conventional method of manufacturing sponge iron. By removing only harmful impurities and removing impurities such as oxides and graphite components, it is possible to obtain sponge iron, which can be used as a material for composite materials with various properties, thus preventing environmental pollution, reducing imports due to recycling of resources, and waste. It is an invention that can add value.

Description

저밀도이면서 입자가 해면형상인 분철의 제조방법Low density and fine particles of sponge powder

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

제 1 도는 종래 기술에 의한 해면분철의 제조방법을 나타낸 공정도, (가)는 밀스케일을 원료로 하는 경우, (나)는 철광석을 원료로 하는 경우, 제 2 도는 본 발명에 의한 해면철분의 제조방법을 나타낸 공정도.1 is a process chart showing a method of manufacturing spongy iron according to the prior art, (A) when using mill scale as a raw material, (B) when using iron ore as a raw material, FIG. Process diagram showing the manufacturing method.

Claims (5)

철강제조공정에서 발생된 슬러지, 또는 분진을 야드(yard)에서 자연건조시킨 후, 조환원공정없이 H2, 암모니아(NH3), 나프타가스등을 사용하여 환원처리한 후 서냉시키면서 650-800℃에 도달하면 20분정도 그대로 유지시켜 탈탄과 소둔처리를 하여 입자의 경화성을 제거시킨 다음 분쇄기에서 분쇄하여 자력선별, 분급, 입도조정을 통해 해면분철을 얻는 것을 특징으로 하는 저밀도이면서 입자가 해면형상인 분철의 제조방법.Sludge or dust generated in the steel manufacturing process is naturally dried in the yard, and then reduced with an H 2 , ammonia (NH 3 ), naphtha gas, etc. without crude reduction and then cooled slowly to 650-800 ° C. When reached, it is maintained for about 20 minutes to remove the hardenability of the particles by decarburization and annealing, and then pulverized in a pulverizer to obtain sponge iron through magnetic screening, classification, and particle size adjustment. Manufacturing method. 제 1 항에 있어서 슬러지의 화학적 성분이 전철분(T,Fe) 22-72%, 금속철분(M,Fe) 2% 이하, 산화규소(SiO2) 1.0-9.3%, 산화마그네슘(MgO) 0.3-4.4%, 산화칼슘(CaO) 2.8-21%, 산화알루미늄(Al2O3) 0.3-4.7%, 고정탄소(Fixed C) 18-41%, 산화아연(ZnO) 0.1-4.0%인 조성을 가지며, 분진은 화학적 성분이 전철분(T.Fe) 17-66%, 산화규소(SiO2) 1-13.4%, 산화마그네슘(MgO) 0.1-3%, 산화칼슘(CaO) 1.8-25%, 산화알루미늄(Al2O3) 0.1-8%, 탄소(C) 0.1-54%, 산화아연(ZnO) 0.2-33%, 산화납(PbO) 0-5%의 조성을 가지는 것을 특징으로 하는 저밀도이면서 입자가 해면형상인 분철의 제조방법.The chemical composition of the sludge is 22-72% of iron powder (T, Fe), 2% or less metal iron (M, Fe), 1.0-9.3% silicon oxide (SiO 2 ), magnesium oxide (MgO) 0.3 -4.4%, calcium oxide (CaO) 2.8-21%, aluminum oxide (Al 2 O 3 ) 0.3-4.7%, fixed carbon (Fixed C) 18-41%, zinc oxide (ZnO) 0.1-4.0% The dust is composed of 17-66% of iron (T.Fe), 1-13.4% of silicon oxide (SiO 2 ), 0.1-3% of magnesium oxide (MgO), 1.8-25% of calcium oxide (CaO), oxidation Low density and particles characterized by composition of aluminum (Al 2 O 3 ) 0.1-8%, carbon (C) 0.1-54%, zinc oxide (ZnO) 0.2-33%, lead oxide (PbO) 0-5% Process for producing powdered iron which is spongy. 제 1 항에 있어서 슬러지와 분진에 함유되어 있는 탄소가 10% 이상인 경우에는 상기 탄소가 입자끼리의 융착을 방지하면서 직접 고체환원제 작용을 하게 되고, 탄소가 10% 이하인 경우에는 수소나 나프타, 암모니아, 또는 CO가스등의 기체 환원제를 첨가하여 환원시키는 것을 특징으로 하는 저밀도이면서 입자가 해면형상인 분철의 제조방법.According to claim 1, when the carbon contained in the sludge and dust is 10% or more, the carbon directly acts as a solid reducing agent while preventing the fusion between particles, when the carbon is 10% or less, hydrogen, naphtha, ammonia, Or reducing and adding a gas reducing agent such as CO gas to reduce the density of particles of spongy form. 제 1 항에 있어서 SiO2, Al2O3, CaO등의 산화물로 인한 입자의 융착을 방지하기 위해 Al2O3분말을 투입하는 것을 특징으로 하는 저밀도이면서 입자가 해면형상인 분철의 제조방법.The method of producing powdered iron having low density and spongy shape according to claim 1, wherein Al 2 O 3 powder is added to prevent fusion of particles due to oxides such as SiO 2 , Al 2 O 3 , CaO, and the like. 제 1 항에 있어서 환원후 재소둔온도는 650-800℃이고, 환원처리온도 850-1100℃, 환원처리시간 50-300분 산화방지 기체 취입량은 8-20l/분임을 특징으로 하는 저밀도이면서 입자가 해면형상인 분철의 제조방법.The method of claim 1, wherein the re-annealed temperature after reduction is 650-800 ℃, the reduction treatment temperature 850-1100 ℃, reduction treatment time 50-300 minutes low density and particles characterized in that the amount of antioxidant gas blown 8-20 l / min Process for producing powdered iron which is spongy. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930013558A 1993-07-16 1993-07-16 Making method of powder metal KR950006268B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930013558A KR950006268B1 (en) 1993-07-16 1993-07-16 Making method of powder metal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930013558A KR950006268B1 (en) 1993-07-16 1993-07-16 Making method of powder metal

Publications (2)

Publication Number Publication Date
KR950003453A true KR950003453A (en) 1995-02-16
KR950006268B1 KR950006268B1 (en) 1995-06-13

Family

ID=19359495

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019930013558A KR950006268B1 (en) 1993-07-16 1993-07-16 Making method of powder metal

Country Status (1)

Country Link
KR (1) KR950006268B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100584732B1 (en) * 2001-04-27 2006-05-30 주식회사 포스코 Recycling method of waste material by using of coal based iron making process
KR100707373B1 (en) * 2005-12-27 2007-04-13 두산인프라코어 주식회사 Apparatus for a fall prevention of cnc body axis and method thereof

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104646680B (en) * 2013-11-20 2017-09-19 正大能源材料(大连)有限公司 A kind of method that utilization Industry Waste iron cement produces high activity iron powder
KR102175428B1 (en) * 2018-11-05 2020-11-06 주식회사 포스코 Manufacturing method of cylindrical porous iron powder

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100584732B1 (en) * 2001-04-27 2006-05-30 주식회사 포스코 Recycling method of waste material by using of coal based iron making process
KR100707373B1 (en) * 2005-12-27 2007-04-13 두산인프라코어 주식회사 Apparatus for a fall prevention of cnc body axis and method thereof

Also Published As

Publication number Publication date
KR950006268B1 (en) 1995-06-13

Similar Documents

Publication Publication Date Title
Sokol et al. Ferrospheres from fly ashes of Chelyabinsk coals: chemical composition, morphology and formation conditions
WO2020073427A1 (en) Method for preparing alloy iron and cement material
US6070733A (en) Treatment of waste material
KR101815475B1 (en) Recovering method of iron concentrate from slag containing iron
KR950003453A (en) Low density and fine particles of sponge powder
KR102402784B1 (en) A manufacturing method of low carbon producing slag powder using refinery slag, accelerator with the slag powder and cement composition with the slag powder
US3635694A (en) Method of manufacturing manganese oxide pellets
US3419383A (en) Producing pulverulent iron for powder metallurgy by multistage reduction
KR960003464B1 (en) Raw material for producing perrite dust for friction elements and the method of reduction thereof
CN109293177B (en) Method for high-temperature solidification of lead-containing sludge
JPS54127804A (en) Recovering metal iron powder from converter dust
US3715764A (en) High porosity manganese oxide pellets
CN111534683A (en) Method for enriching iron oxide in iron tailings by using alkali fusion method
JPH0149762B2 (en)
US5242483A (en) Process for the production of vanadium-containing steel alloys
US3083090A (en) Production of sinter
US3635695A (en) Desulfurizing with manganese oxide pellets
GB938546A (en) Improvements in or relating to metalliferous compositions
US2217569A (en) Process for the production of metallic iron powder
JPH11228142A (en) Production of ferrite
JPS62297406A (en) Production of spheroidized reduced iron powder
US4518423A (en) Method for preparing a low residual alloy steel charge from scrap metal
RU2086676C1 (en) Method of manufacturing briquets from metallurgic raw material
RU2025524C1 (en) Method to reprocess titanium-magnetite concentrates bearing vanadium
JPS6137321B2 (en)

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
G160 Decision to publish patent application
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
LAPS Lapse due to unpaid annual fee