CN109055667A - A kind of decarburization smelting process of high manganese stainless steel - Google Patents
A kind of decarburization smelting process of high manganese stainless steel Download PDFInfo
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- CN109055667A CN109055667A CN201811050925.1A CN201811050925A CN109055667A CN 109055667 A CN109055667 A CN 109055667A CN 201811050925 A CN201811050925 A CN 201811050925A CN 109055667 A CN109055667 A CN 109055667A
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- decarburization
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- 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
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Abstract
The invention belongs to stainless steel Decarburising and refining technical fields, and in particular to a kind of decarburization smelting process of high manganese stainless steel.This method, as raw material, is refined using the waste material of chromium manganese systems stainless steel by special AOD.Method of the invention does not need to add electrolytic manganese after AOD is refined or manganese metal carries out ingredient, it can be with the manganese Metal in high efficiente callback chromium manganese systems steel scrap, greatly facilitate preparation process, improve the rate of recovery of manganese Metal in steel scrap, reduce cost of material, it realizes steel scrap waste material and absolutely returns to production stainless steel, and realize the development of the economic stainless steel production of cycle energy.
Description
Technical field
The invention belongs to stainless steel Decarburising and refining technical fields, and in particular to a kind of decarburization smelting side of high manganese stainless steel
Method.
Background technique
China's nickel resources are deficient, and chromium resource does not also enrich.And chromium manganese systems (200 systems or 201 systems) austenitic stainless steel be
On the basis of chromium nickel series austenitic stainless steel, manganese is added into steel and (or) nitrogen replaces precious metal nickel element and grows up,
Its Ovshinsky element of volume, there are also nitrogen except demanganization, and general there are also suitable nickel.Manganese plays stable austenite in steel.It is suitable for
It is bearing compared with heavy load and corrosion resistance requires to use in less high equipment and component.
Chromium manganese systems (200 system) stainless steel is due to relatively high containing manganese, and generally 8% or more, highest content reaches 15% or more, this
It requires to refine later period addition electrolytic manganese and manganese metal in AOD, needs additional thermal compensation.Due to being refined work by existing AOD
The addition of the limitation of skill, manganese cannot be difficult to decarburization because will lead in the case where manganese content is excessively high, shadow before AOD refining
The performance for ringing product, manganese content is no more than 3% before generally requiring AOD to refine, then some chromium manganese systems (200 system) stainless steel produces
The waste material of product can not be used directly.But it thus needs to add electrolytic manganese after AOD is refined or manganese metal carries out ingredient, system
Standby process is relatively complicated, and the waste material due to can not directly use chromium manganese systems stainless steel product, leads to higher cost.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of decarburization smelting process of high manganese stainless steel, it is existing to solve
Technique can not directly use chromium manganese systems stainless steel waste material as raw material.
The technical scheme adopted by the invention is as follows:
A kind of decarburization smelting process of high manganese stainless steel, comprising the following steps:
1) waste material of manganese chrome stainless steel is added in electric furnace and is melted, 1570-1600 DEG C of melt temperature, the thawing time
120min forms crude molten steel；
2) crude molten steel is blended into AOD furnace, adjusts molten steel composition are as follows: carbon 0.6%-0.8%, manganese 7.0%-8.0%, silicon 0.35%-
0.45%, remaining ingredient reaches the requirement of smelted steel grade；
3) it is blown at 1550-1580 DEG C pure oxygen 5-7 minutes, then controls decarburization temperature at 1650-1680 DEG C, carry out decarburization behaviour
Make, three phases are divided into during decarburization and are blown into decarburization gas, the first stage is blown into O2:N2/ Ar=1:1(O2:N2=1:1 or O2:Ar=
1:1), decarburization is to 0.25%；Second stage is blown into O2:N2/ Ar=1:2(O2:N2=1:2 or O2: Ar=1:2), decarburization to 0.15%；The
Three stages were blown into O2:N2/ Ar=1:3(O2:N2=1:3 or O2: Ar=1:3), decarburization to 0.075-0.110%；
4) it after decarburization, is blown 1-2 minutes with nitrogen, temperature controls 1650-1680 DEG C；
5) reduction period, AOD furnace need to be added slag former (FeSi, SiCr, SiMn, Al or lime) according to product and remove impurity removing, and
It is blown 6-8 minutes, is slagged tap with nitrogen gas stirring, with argon gas blowing 2-3min, tapping；Chromium recovery ratio is set to reach 99%, manganese recovery ratio reaches
To 90% or more, basicity of slag is controlled in 1.9-2.1.
Compared with prior art, the method have the benefit that:
1, present invention employs special AOD refinery practice, AOD refines the decarburization time-division for three phases, respectively different
While stage oxygen blast, it is blown into the inert gas (Ar, N2) of different ratio, is divided by reducing CO, achievees the effect that false vacuum,
To make carbon take off very low level and inhibit the oxidation of chromium in steel, " carbon drop guarantor chromium " purpose is realized, this refines AOD stainless
It is vital for steel；Can overcome in the prior art can not be higher to manganese content for new AOD refinery practice in the present invention
(manganese >=3%) crude molten steel carries out the defect of decarburization, therefore carries out ingredient without adding electrolytic manganese or manganese metal after AOD refining.
2) chromium recovery ratio of AOD refinery practice of the present invention is high, looser for raw material requirement, can use cheap height
The waste material 100% of manganese chrome stainless steel can be returned to production stainless steel by carbon ferrochrome, and remarkable in economical benefits etc., the technique is for reality
Border liquid steel temperature control in " carbon drop guarantor chromium ", furnace is 1650-1700 DEG C, consider silicon preferential oxidation in AOD refining process and
The oxidation of manganese is not considered.
3) fining process of the invention is simple, by changing previous gas blowing mode, changes previous blowing
The control of process temperature is directly added into the waste materials such as the leftover pieces of chromium manganese systems (200 systems or 201 be stainless steel) product in ingredient,
Ingredient is carried out without adding electrolytic manganese or manganese metal after AOD is refined, it can be in high efficiente callback chromium manganese systems steel scrap
Manganese Metal greatly facilitates preparation process, improves the rate of recovery of manganese Metal in steel scrap, reduces cost of material, realizes useless
Steel waste material absolutely returns to production stainless steel, and realizes the development of the economic stainless steel production of cycle energy.
Specific embodiment
Illustrate a specific embodiment of the invention below with reference to embodiment, but following embodiment is used only to be described in detail
The present invention does not limit the scope of the invention in any way.
Cold burden in following embodiment is containing chromium/nickel steel scrap, evanohm or copper alloy.
Embodiment 1:
The decarburization smelting process of high manganese stainless steel, comprising the following steps:
1) be by 201 stainless steel 4 tons of addition electric furnaces of 48 tons of waste material and cold burden in melt, 1570 DEG C of melt temperature, melt
Change time 120min, forms crude molten steel；
2) crude molten steel is blended into AOD furnace, adjusts molten steel composition are as follows: carbon 0.6%-0.8%, manganese 7.0%-8.0%, silicon 0.35%-
0.45%, remaining ingredient reaches the requirement of smelted steel grade；
3) it is blown at 1550 DEG C pure oxygen 7 minutes, controls decarburization temperature at 1650 DEG C, carry out Decarburization Operation, be divided into three during decarburization
A stage is blown into decarburization gas, and the first stage is blown into O2:N2=1:1, decarburization to 0.25%；Second stage is blown into O2:N2=1:2,
Decarburization is to 0.15%；Phase III is blown into O2:N2=1:3, decarburization to 0.075-0.110%；
4) after decarburization, with nitrogen 1 minute (purpose is deoxidation) of blowing, temperature controls 1650 DEG C；5) then reduction period is added
Slag former, and with nitrogen gas stirring, reduction period blows 6 minutes, slags tap, and molten steel composition meets the requirements, and is blown 2 minutes (mesh with argon gas
Be the nitrogen content adjusted in steel grade), adjustment bits, temperature can properly tap to obtain high manganese stainless steel, reach chromium recovery ratio
To 96%, manganese recovery ratio reaches 90% or more, and basicity of slag is controlled 1.9.
Embodiment 2:
The decarburization smelting process of high manganese stainless steel, comprising the following steps:
1) be by 201 stainless steel 4-6 tons of addition electric furnaces of 48 tons of waste material and cold burden in melt, 1580 DEG C of melt temperature, melt
Change time 120min, forms crude molten steel；
2) crude molten steel is blended into AOD furnace, adjusts molten steel composition are as follows: carbon 0.6%-0.8%, manganese 7.0%-8.0%, silicon 0.35%-
0.45%, remaining ingredient reaches the requirement of smelted steel grade；
3) it is blown at 1570 DEG C pure oxygen 5 minutes, controls decarburization temperature at 1670 DEG C, carry out Decarburization Operation, be divided into three during decarburization
A stage is blown into decarburization gas, and the first stage is blown into O2: Ar=1:1, decarburization to 0.25%；Second stage is blown into O2: Ar=1:2 takes off
Carbon is to 0.15%；Phase III is blown into O2: Ar=1:3, decarburization to 0.075-0.110%；
4) after decarburization, with nitrogen 2 minutes (purpose is deoxidation) of blowing, temperature controls 1670 DEG C；Then slag former is added, and
With nitrogen gas stirring, reduction period blows 7 minutes, slags tap.Molten steel composition meets the requirements, and being blown 3 minutes with argon gas, (purpose is adjustment steel
Nitrogen content in kind), adjustment bits, temperature can properly tap to obtain high manganese stainless steel, so that chromium recovery ratio is reached 96%, manganese returns
Yield reaches 90% or more, and basicity of slag is controlled 2.0.
Embodiment 3:
The decarburization smelting process of high manganese stainless steel, comprising the following steps:
1) be by 201 stainless steel 4-6 tons of addition electric furnaces of 48 tons of waste material and cold burden in melt, 1600 DEG C of melt temperature, melt
Change time 120min, forms crude molten steel；
2) crude molten steel is blended into AOD furnace, adjusts molten steel composition are as follows: carbon 0.6%-0.8%, manganese 7.0%-8.0%, silicon 0.35%-
0.45%, remaining ingredient reaches the requirement of smelted steel grade；
3) it is blown at 1580 DEG C pure oxygen 5 minutes, controls decarburization temperature at 1680 DEG C, carry out Decarburization Operation, be divided into three during decarburization
A stage is blown into decarburization gas, and the first stage is blown into O2:N2=1:1, decarburization to 0.25%；Second stage is blown into O2: Ar=1:2 takes off
Carbon is to 0.15%；Phase III is blown into O2:N2=1:3, decarburization to 0.075-0.110%；
4) after decarburization, with nitrogen 2 minutes (purpose is deoxidation) of blowing, temperature controls 1680 DEG C；Then slag former is added, and
With nitrogen gas stirring, reduction period blows 6 minutes, slags tap.Molten steel composition meets the requirements, and being blown 3 minutes with argon gas, (purpose is adjustment steel
Nitrogen content in kind), adjustment bits, temperature can properly tap to obtain high manganese stainless steel, so that chromium recovery ratio is reached 96%, manganese returns
Yield reaches 90% or more, and basicity of slag is controlled 2.1.
Through detecting, the properties of high manganese stainless steel made from the embodiment of the present invention meet professional standard.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, this field is common
Other modifications or equivalent replacement that technical staff makes technical solution of the present invention, without departing from technical solution of the present invention
Spirit and scope, be intended to be within the scope of the claims of the invention.
Claims (1)
1. a kind of decarburization smelting process of high manganese stainless steel, which comprises the following steps:
1) waste material of manganese chrome stainless steel and cold burden are added in electric furnace and are melted, 1570-1600 DEG C of melt temperature, when thawing
Between 120min, formed crude molten steel；
2) crude molten steel is blended into AOD furnace, adjusts molten steel composition are as follows: carbon 0.6%-0.8%, manganese 7.0%-8.0%, silicon 0.35%-
0.45%, remaining ingredient reaches the requirement of smelted steel grade；
3) it is blown at 1550-1580 DEG C pure oxygen 5-7 minutes, then controls decarburization temperature at 1650-1680 DEG C, carry out decarburization
Operation, is divided into three phases and is blown into decarburization gas, the first stage is blown into O during decarburization2:N2/ Ar=1:1, decarburization to 0.25%；The
Two-stage is blown into O2:N2/ Ar=1:2, decarburization to 0.15%；Phase III is blown into O2:N2/ Ar=1:3, decarburization to 0.075-
0.110%；
4) it after decarburization, is blown 1-2 minutes with nitrogen, temperature controls 1650-1680 DEG C；
5) then reduction period is added slag former, and is blown 6-8 minutes with nitrogen gas stirring, slag tap, and is gone out with argon gas blowing 2-3min
Steel.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111663071A (en) * | 2020-06-17 | 2020-09-15 | 中冶东方工程技术有限公司 | Economical chromium-manganese stainless steel smelting production method and system thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102965584A (en) * | 2012-12-17 | 2013-03-13 | 山西太钢不锈钢股份有限公司 | High-nitrogen high-manganese stainless steel and smelting method thereof |
| CN103468874A (en) * | 2013-08-20 | 2013-12-25 | 北京科技大学 | Method for manufacturing low-carbon TWIP steel through AOD (argon oxygen decarburization) furnace |
| CN105039648A (en) * | 2015-08-04 | 2015-11-11 | 上海应用技术学院 | Method for smelting low-carbon and high-manganese-content molten steel through argon oxygen decarburizing furnace |
| CN105039649A (en) * | 2015-08-04 | 2015-11-11 | 上海应用技术学院 | Method for smelting high-carbon-content and high-manganese-content molten steel through argon oxygen decarburizing furnace |
| CN105087865A (en) * | 2015-08-12 | 2015-11-25 | 上海应用技术学院 | Method for smelting high-manganese TWIP steel by adopting argon-oxygen decarburization furnace |
| CN107245637A (en) * | 2017-06-26 | 2017-10-13 | 永兴特种不锈钢股份有限公司 | A kind of AOD smelts the method and a kind of AOD furnace of high manganese stainless steel |
-
2018
- 2018-09-10 CN CN201811050925.1A patent/CN109055667A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102965584A (en) * | 2012-12-17 | 2013-03-13 | 山西太钢不锈钢股份有限公司 | High-nitrogen high-manganese stainless steel and smelting method thereof |
| CN103468874A (en) * | 2013-08-20 | 2013-12-25 | 北京科技大学 | Method for manufacturing low-carbon TWIP steel through AOD (argon oxygen decarburization) furnace |
| CN105039648A (en) * | 2015-08-04 | 2015-11-11 | 上海应用技术学院 | Method for smelting low-carbon and high-manganese-content molten steel through argon oxygen decarburizing furnace |
| CN105039649A (en) * | 2015-08-04 | 2015-11-11 | 上海应用技术学院 | Method for smelting high-carbon-content and high-manganese-content molten steel through argon oxygen decarburizing furnace |
| CN105087865A (en) * | 2015-08-12 | 2015-11-25 | 上海应用技术学院 | Method for smelting high-manganese TWIP steel by adopting argon-oxygen decarburization furnace |
| CN107245637A (en) * | 2017-06-26 | 2017-10-13 | 永兴特种不锈钢股份有限公司 | A kind of AOD smelts the method and a kind of AOD furnace of high manganese stainless steel |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111663071A (en) * | 2020-06-17 | 2020-09-15 | 中冶东方工程技术有限公司 | Economical chromium-manganese stainless steel smelting production method and system thereof |
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Application publication date: 20181221 |