CN104164606B - A kind of smelt iron Ohmax adds the method for aluminium - Google Patents

A kind of smelt iron Ohmax adds the method for aluminium Download PDF

Info

Publication number
CN104164606B
CN104164606B CN201410388214.0A CN201410388214A CN104164606B CN 104164606 B CN104164606 B CN 104164606B CN 201410388214 A CN201410388214 A CN 201410388214A CN 104164606 B CN104164606 B CN 104164606B
Authority
CN
China
Prior art keywords
aluminium
molten steel
adds
vod
smelting
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.)
Active
Application number
CN201410388214.0A
Other languages
Chinese (zh)
Other versions
CN104164606A (en
Inventor
刘承志
李建民
常国栋
姜周华
李筱
李花兵
张剑桥
尹嵬
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.)
Northeastern University China
Shanxi Taigang Stainless Steel Co Ltd
Original Assignee
Northeastern University China
Shanxi Taigang Stainless 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 Northeastern University China, Shanxi Taigang Stainless Steel Co Ltd filed Critical Northeastern University China
Priority to CN201410388214.0A priority Critical patent/CN104164606B/en
Publication of CN104164606A publication Critical patent/CN104164606A/en
Application granted granted Critical
Publication of CN104164606B publication Critical patent/CN104164606B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Treatment Of Steel In Its Molten State (AREA)

Abstract

The invention discloses a kind of method that smelt iron Ohmax adds aluminium, belong to technical field of smelting.Comprise smelting molten steel and add aluminium technique, the described aluminium technique that adds is carried out in VOD stove, specifically comprise the following steps: adopt the stainless steel smelting equipment such as VOD to carry out smelting ferrum-chromium-aluminum product by stainless steel-making process, flow process comprises: electric furnace+VOD smelts (can have other smelting furnace after VOD stove) such as method, intermediate frequency furnace+VOD, converter+VOD and electric furnace+AOD+VOD smelting methods.The first step is smelted the molten steel composition, temperature, the quantity of slag that and is met certain requirements; During second step VOD stove is smelted, by the quantity of slag in control VOD stove smelting process; According to the isolated ability of air that vacuum metallurgy process is good, and increase the measures such as reduction period stirring intensity, make the recovery rate of aluminium bring up to more than 80%.

Description

A kind of smelt iron Ohmax adds the method for aluminium
Technical field
VOD stove (vacuum decarburization refining furnace) the smelt iron Ohmax that the present invention relates to a kind of more than 20 tons adds the method for aluminium, belongs to metallurgical technology field.
Background technology
Aludirome uses electric heating engineering materials comparatively widely, and at present, most of enterprise adopts the technology mode of vacuum induction furnace+esr to carry out production ferrum-chromium-aluminum product, and furnace capacity is little, production efficiency is low, production cost is high.
Aludirome composition is as follows:
C≤0.15%, Si≤1.0%, Mn≤0.70%, P≤0.03%, S≤0.01%, Cr12.00%-28.00%, Al:3.00%-7.00%, Mo≤3.00%, Co≤1.00%, Nb≤1.00%, Ti≤1.00%, rare earth≤0.50%, Ni≤0.60%, all the other are iron.
Adopt VOD stove smelt iron Ohmax, there is the process difficulties adding aluminium.When the smelting reducing phase adds aluminium, because the density of aluminium only has 2.7kg/cm 3it is, lower than the density of liquid slag that (liquid slag density is at 3.0-3.5kg/cm 3), make the aluminium being added in slag surface, be difficult to enter molten steel, thus with MnO, the Cr in liquid slag 2o 3, SiO 2, FeO reacts, and aluminium very easily with the oxygen generation oxidizing reaction in air, make aluminium become Al 2o 3, add aluminium explained hereafter according to the general reduction period of VOD stove, the recovery rate of aluminium is the highest can only reach 70%.
Summary of the invention
The present invention aims to provide a kind of method that VOD stove smelt iron Ohmax adds aluminium, and the recovery rate of VOD stove smelt iron Ohmax aluminium can be made to bring up to more than 80%.
The detailed process of alloy smelting comprises: 1) electric furnace or induction furnace melt raw material, the refining of VOD stove; 2) converter adopts molten iron, alloy smelting, the refining of VOD stove.
The present invention is by the quantity of slag in control VOD stove smelting process; According to the isolated ability of air that vacuum metallurgy process is good, and increase the measures such as reduction period stirring intensity, make the recovery rate of aluminium bring up to more than 80%.
A kind of smelt iron Ohmax provided by the invention adds the method for aluminium, and comprise smelting molten steel and add aluminium technique, the described aluminium technique that adds is carried out in VOD stove, specifically comprises the following steps:
1, smelting molten steel:
Smelt by stainless steel-making process, for VOD provides molten steel, its molten steel composition, temperature, the quantity of slag meet following requirement:
C≤0.50%, Si:0.05-0.70%, Mn:0.001-0.70%, P:0.001-0.03%, S:0.001-0.01%, Cr12.00%-28.00%, Mo:0.001-3.00%, Co:0.001-1.00%, Nb:0.001-0.50%, Ti:0.001-1.0%, La+Y:0.001-0.25% all the other be iron; Temperature is 1500-1660 DEG C; Molten steel is slag weight in ladle: 0.1-10.0kg/t molten steel;
Smelting equipment described in this step is any one in electric furnace, intermediate frequency furnace, converter or electric furnace+AOD;
2, VOD stove adds aluminium technique:
(1) VOD stove is when smelting ferrum-chromium-aluminum, and vacuum tightness is below 50Pa;
(2) VOD oxygen decarburization, when carbon content≤0.01%, stops oxygen blast controlling vacuum values≤50Pa, then only seethes with excitement more than 10 minutes;
(3) before adding aluminium, liquid steel temperature controls below 1670 DEG C;
(4) high hopper is passed through, take to add aluminium technique in batches, every batch adds aluminum shot 5-20 kg/tonne molten steel and after adding aluminium, adds lime 1-5kg/ ton molten steel, control argon bottom-blowing flow 0.10-0.20 liter/(minute ton molten steel), stir after 2-3 minute, reduce argon bottom-blowing flow to 0.05-0.10 liter/(minute ton molten steel), add a collection of secondary aluminium every 3-5 minute by above-mentioned steps;
The add-on of described aluminium is: be that 90% calculating adds aluminum amount by the recovery rate of aluminium in prepared steel grade.
(5) after all aluminum shot adds, after argon bottom-blowing flow 0.05-0.10 liter/(minute ton molten steel) stirs 3-5 minute, improve argon bottom-blowing flow to 0.10-0.25 liter/(minute ton molten steel), then stir 2-3 minute;
(6) ladle vacuum breaker, thermometric, sampling, carry out next step operation according to processing requirement.
According to above step, the recovery rate of aluminium can reach more than 80%.
Of the present invention beneficial effect:
Adopt the present invention to add aluminium technique in batches, control the parameters in this technological process simultaneously, aluminium recovery can be made from less than 70%, bring up to more than 80%.
Embodiment
Below by embodiment, the method that Aludirome vacuum decarburization refining furnace of the present invention adds aluminium is described in detail, but the specific embodiment of the present invention is not limited to following embodiment.
Embodiment 1: the ferrum-chromium-aluminum steel grade of the present embodiment is 0Cr21Al6.
The component requirements of this steel grade is as following table: (unit: %)
The step of the present embodiment is as follows successively:
1, smelting molten steel:
Adopt 90 tons of K-OBM-S converter smeltings, gained crude molten steel composition is as follows:
C:0.32%, Si:0.12%, P:0.013%, S:0.026%, Cr:21.53, Ni:0.04%, all the other are Fe.
Molten steel actual weight is 82 tons; Liquid steel temperature: 1615 DEG C; In ladle, slag weight: 122kg(is 1.49kg/t molten steel).
Gained molten steel is for the refining of 90 tons of VOD stoves.
2, furnaceman's VOD skill:
(1) molten steel is poured in VOD stove, control vacuum tightness is 33Pa;
(2) VOD carries out oxygen decarburization, and according to mass spectrograph gasometry result, molten steel carbon component, between 0.005%-0.008%, stops oxygen blast, controls vacuum tightness and reaches 33Pa, then only seethe with excitement 11 minutes.
(3) liquid steel temperature 1603 DEG C is surveyed, pass through high hopper, add first aluminum shot 500 kilograms (6.10kg/t), 200 kilograms, lime (2.44kg/t), control argon bottom-blowing flow 0.11 liter/min of ton molten steel, stir after 2.5 minutes, reduce argon bottom-blowing flow to 0.06 liter/min of ton molten steel, stir after 3.0 minutes, add aluminum shot 700kg(8.54kg/t), 100 kilograms, lime (1.22kg/t), stir after 3.2 minutes, add aluminum shot 1000kg(12.20kg/t), 100 kilograms, lime (1.22kg/t), stir after 4.8 minutes, add aluminum shot 1500kg(18.29kg/t), 100 kilograms, lime (1.22kg/t), again stir after 5 minutes, add aluminum shot 1130kg(13.78kg/t), 100 kilograms, lime (1.22kg/t).
(4) after aluminum shot adds, continue according to argon bottom-blowing flow to 0.06 liter/(minute ton molten steel), stir 4.0 minutes, improve argon bottom-blowing flow to 0.24 liter/(minute ton molten steel), stirs 2 minutes, guarantee aluminium is evenly mixed in molten steel.
(5) ladle vacuum breaker, thermometric, sampling, analyze molten steel composition:
C:0.006%, Si:0.41%, Mn:0.13%, P:0.011%, S:0.001%, Cr19.77%, Ni:0.14%, Al:5.39%, N:0.0043%, all the other are iron.
According to above operation, the recovery rate of aluminium is actual reaches 96.0%.
Embodiment 2: the ferrum-chromium-aluminum steel grade of the present embodiment is 1Cr20Al3.
The component requirements of this steel grade is as following table: (unit: %)
The step of the present embodiment is as follows successively:
1, smelting equipment, molten steel condition:
Adopt 90 tons of K-OBM-S converter smeltings, the crude molten steel composition for VOD is as follows:
C:0.28%, Si:0.15%, P:0.012%S:0.018%, Cr:21.08, Ni:0.08%, all the other are Fe.Molten steel actual weight 80 tons.Liquid steel temperature: 1608 DEG C.Slag weight: 135kg in ladle.
Gained molten steel is for the refining of 90 tons of VOD stoves.
2, furnaceman's VOD skill:
(1) molten steel is poured in VOD stove, control vacuum tightness is 33Pa;
(2) VOD carries out oxygen decarburization, and according to mass spectrograph gasometry result, molten steel carbon component, between 0.006-0.009%, stops oxygen blast, controls vacuum tightness and reaches 33Pa, then only seethe with excitement 10 minutes.
(3) thermometric 1572 DEG C, pass through high hopper, add first aluminum shot 600 kilograms (7.50kg/t), 200 kilograms, lime (2.50kg/t), control argon bottom-blowing flow 0.11 liter/min of ton molten steel, stir after 2 minutes, reduce argon bottom-blowing flow to 0.06 liter/min of ton molten steel, second batch adds aluminum shot 600 kilograms (7.50kg/t), 100 kilograms, lime (1.25kg/t), stir after 3.5 minutes, 3rd batch adds aluminum shot 1000kg(12.5kg/t), 100 kilograms, lime (1.25kg/t), stir after 4 minutes, 4th batch adds aluminum shot 1450kg(18.13kg/t), 100 kilograms, lime (1.25kg/t).
(4) after aluminum shot adds, continue according to argon bottom-blowing flow to 0.06 liter/(minute ton molten steel), stir 4.0 minutes, improve argon bottom-blowing flow to 0.20 liter/(minute ton molten steel), stirs 3 minutes, guarantee aluminium is evenly mixed in molten steel.
(5) ladle vacuum breaker, thermometric, sampling, analyze molten steel composition:
C:0.008%, Si:0.45%, Mn:0.11%, P:0.013%, S:0.001%, Cr20.15%, Ni:0.10%, Al:3.90%, N:0.0054%, all the other are iron.
According to above operation, the recovery rate of aluminium is actual reaches 88.5%.

Claims (3)

1. smelt iron Ohmax adds a method for aluminium, comprises smelting molten steel and adds aluminium technique, it is characterized in that: the described aluminium technique that adds is carried out in VOD stove, specifically comprises the following steps:
(1) smelting molten steel:
Adopt smelting equipment to smelt by stainless steel-making process, the composition of gained molten steel, temperature, the quantity of slag meet following requirement:
C≤0.50%, Si:0.05-0.70%, Mn:0.001-0.70%, P:0.001-0.03%, S:0.001-0.01%, Cr12.00%-28.00%, Mo:0.001-3.00%, Co:0.001-1.00%, Nb:0.001-0.50%, Ti:0.001-1.0%, La+Y:0.001-0.25%, all the other are iron; Temperature is 1550-1620 DEG C; Molten steel is slag weight in ladle: 0.1-10.0kg/t molten steel;
(2) VOD stove adds aluminium technique:
(1) VOD stove is when smelting ferrum-chromium-aluminum, and vacuum tightness is below 50Pa;
(2) VOD oxygen decarburization, when carbon content≤0.01%, stops oxygen blast controlling vacuum values≤50Pa, then only seethes with excitement more than 10 minutes;
(3) adding temperature in aluminium process controls below 1620 DEG C;
(4) high hopper is passed through, take to add aluminium technique in batches, every batch adds aluminum shot 5-20 kg/tonne molten steel and after adding aluminium, adds lime 1-5kg/ ton molten steel, control argon bottom-blowing flow 0.10-0.20 liter/(minute ton molten steel), stir after 2-3 minute, reduce argon bottom-blowing flow to 0.05-0.10 liter/(minute ton molten steel), add a collection of secondary aluminium every 3-5 minute by above-mentioned steps;
The add-on of described aluminium is: be that 90% calculating adds aluminum amount by the recovery rate of aluminium in prepared steel grade;
(5) after all aluminum shot adds, after argon bottom-blowing flow 0.05-0.10 liter/(minute ton molten steel) stirs 3-5 minute, improve argon bottom-blowing flow to 0.10-0.25 liter/(minute ton molten steel), then stir 2-3 minute;
(6) ladle vacuum breaker, thermometric, sampling, carry out next step operation according to processing requirement.
2. smelt iron Ohmax according to claim 1 adds the method for aluminium, it is characterized in that: the smelting equipment in described step (one) smelting molten steel is any one in electric furnace, intermediate frequency furnace, converter or electric furnace+AOD.
3. smelt iron Ohmax according to claim 1 adds the method for aluminium, it is characterized in that: the recovery rate of described aluminium reaches more than 80%.
CN201410388214.0A 2014-08-08 2014-08-08 A kind of smelt iron Ohmax adds the method for aluminium Active CN104164606B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410388214.0A CN104164606B (en) 2014-08-08 2014-08-08 A kind of smelt iron Ohmax adds the method for aluminium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410388214.0A CN104164606B (en) 2014-08-08 2014-08-08 A kind of smelt iron Ohmax adds the method for aluminium

Publications (2)

Publication Number Publication Date
CN104164606A CN104164606A (en) 2014-11-26
CN104164606B true CN104164606B (en) 2016-03-30

Family

ID=51908587

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410388214.0A Active CN104164606B (en) 2014-08-08 2014-08-08 A kind of smelt iron Ohmax adds the method for aluminium

Country Status (1)

Country Link
CN (1) CN104164606B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109423536B (en) * 2017-08-25 2021-04-13 宝山钢铁股份有限公司 Smelting method of ultra-low carbon 13Cr stainless steel
CN108456816A (en) * 2018-02-08 2018-08-28 盐城市鑫洋电热材料有限公司 A method of increasing the tough socket type fracture probability of ferrum-chromium-aluminum ternary alloy three-partalloy
CN108441748A (en) * 2018-03-08 2018-08-24 盐城市鑫洋电热材料有限公司 A kind of preparation method of the Aludirome of high aluminium content
CN111424134B (en) * 2020-03-17 2022-03-01 中北大学 Production method of iron-chromium-aluminum alloy continuous casting slab
CN112609132A (en) * 2020-11-18 2021-04-06 江苏申源集团有限公司 Production and preparation method of iron-chromium-aluminum electrothermal alloy wire rod
CN113174531B (en) * 2021-03-31 2022-09-02 中北大学 Medium-chromium type iron-chromium-aluminum alloy and production method thereof
CN114086052B (en) * 2021-12-03 2022-11-15 宝钢德盛不锈钢有限公司 Smelting method of low-density stainless steel

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101376915B (en) * 2008-09-29 2010-11-03 山西太钢不锈钢股份有限公司 Method for smelting high-alumina non-magnetic steel
CN103225034B (en) * 2013-04-25 2015-05-06 山西太钢不锈钢股份有限公司 Method for improving yielding rate of ultra pure ferrite stainless steel titanium
CN103397141B (en) * 2013-07-30 2014-12-24 山西太钢不锈钢股份有限公司 Smelting method of high-aluminum stainless steel

Also Published As

Publication number Publication date
CN104164606A (en) 2014-11-26

Similar Documents

Publication Publication Date Title
CN104164606B (en) A kind of smelt iron Ohmax adds the method for aluminium
CN101993973B (en) Method for producing high-purity pure iron
CN101328555B (en) Mixing method of high quality low phosphor and sulfur high-alloy steel
CN103468874B (en) Method for manufacturing low-carbon TWIP steel through AOD (argon oxygen decarburization) furnace
CN104831153B (en) The preparation method of V150 grade of steel high-strength tenacity casing steels
CN104451385B (en) A kind of low-carbon (LC), low nitrogen, hyperoxia ingot iron and its production method
CN102796947A (en) High-grade non-oriented silicon steel with excellent magnetism and smelting method for high-grade non-oriented silicon steel
CN106636862A (en) Technology for smelting super duplex stainless steel for argon oxygen furnace
CN106834602A (en) Steel-making rare-earth aluminum-calcium ferrosilicon composite alloy and preparation method thereof
CN108103261A (en) A kind of mini-mill steelmaking method based on converter
CN115044820B (en) Smelting method of ultralow-carbon ultralow-sulfur pure iron
CN106480353A (en) A kind of method that utilization vanadium-bearing hot metal carries out alloying to HRB400 steel
CN104946845B (en) Method for producing high-carbon-chrome bearing steel from vanadium-titanium-containing molten iron
CN107475481A (en) Control the steel-casting smelting process of Nb contents
CN107058867B (en) A kind of energy saving transformer iron core high Si pure iron and its production method
CN113430334A (en) GOR smelting method for improving scrap steel ratio of 200 series stainless steel
EP2039788A1 (en) Dephosphorization method in the process of smelting ni-cr pig iron from a nickel oxide ore
CN103484599B (en) Smelting method of high-manganese wear-resistant steel
CN107058859A (en) A kind of composite micro-alloyed alloy of the rare earth made of steel slags and its application
CN114277215B (en) Method for smelting low manganese steel by using high manganese scrap steel in medium frequency induction furnace
CN107604127B (en) The technique for smelting precipitation hardening steel using vacuum decarburization furnace
CN105624357A (en) Stainless steel AOD converter steelmaking technology using nickel protoxide ball for direct reductive alloying
CN105039649B (en) A kind of method of use argon oxygen decarburizing furnace smelting high carbon high Mn content molten steel
CN104946854B (en) Steel smelting method
CN107034337A (en) A kind of dephosphorization method of smelting S22053 two phase stainless steels

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant