CN1641051A - Nickel-containing sponge iron, and its preparing method and method for producing nickel alloy billet - Google Patents

Nickel-containing sponge iron, and its preparing method and method for producing nickel alloy billet Download PDF

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Publication number
CN1641051A
CN1641051A CN 200410092402 CN200410092402A CN1641051A CN 1641051 A CN1641051 A CN 1641051A CN 200410092402 CN200410092402 CN 200410092402 CN 200410092402 A CN200410092402 A CN 200410092402A CN 1641051 A CN1641051 A CN 1641051A
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nickel
sponge iron
stainless steel
raw
iron
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CN1312297C (en
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李增元
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李增元
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Abstract

The present invention relates to one kind of nickel-containing sponge iron and its production process as well as process of producing nickel alloy steel billet. The waste from stainless steel smelting, including fume, slime and iron scale as the main material is mixed with coke powder; the mixture is extruded to form, filled into reducing tank and reduced through roasting in kiln at 1000-1500 deg.c to obtain nickel-containing sponge iron. Further, the nickel-containing sponge iron, ferrosilicon powder, limestone powder and carbon powder are smelted in arc furnace into nickel alloy steel billet, which is used for smelting stainless steel. The present invention utilizes the waste and can lower the production cost of stainless steel.

Description

Nickel-containing sponge iron and method for making thereof, and the method for producing nickel alloy billet
Affiliated technical field
The present invention relates to the sponge iron in the smelting iron and steel, particularly relate to a kind of sponge iron that contains nickel, and the production method of this nickel-containing sponge iron.The invention still further relates to and utilize this nickel-containing sponge iron to make the method for nickel alloy billet.
Background technology
Nickel is good corrosion resistant material, is that the important alloying element, particularly nickel in the steel alloy still is to form austenitic element in the steel, is stainless important component part.
Extensive development and application along with Refractoloy and nickeliferous 20% following high-strength steel, and the fast development of chemical industry is increasing to stainless requirement, demand for metallic nickel also grows with each passing day, especially Zhong Guo stainless steel industry development is very swift and violent, 2003, China's stainless steel consumption has broken through 4,000,000 tons, and self-produced stainless steel ability has also reached 1,600,000 tons.Yet, because in the world nickel reserves are less, and concentrate again and be distributed in the minority area, therefore worldwide caused the supply and demand anxiety of nickel.In China, the price of nickel is soaring to the vertex over 14 years in January, 2004, prediction according to insg, in 2004 and 2005 2 years of future, the nickel supply of China will have very big breach, the passive situation that this will cause in the face of the shortage owing to nickel with regard to the stainless steel production industry that makes China increase fast.
Be in worldwide on the one hand, as the nickel supply and demand anxiety of producing one of stainless steel important source material, and on the other hand, by-product materials such as the flue dust that China produces when producing stainless steel, layer mud, iron scale can't the reclaiming utilization but because of there not being a kind of suitable recovery method bulk deposition to abandon so far.These wastes accumulations are abandoned, not only needed to take a large amount of idle places, and can bring serious environmental to pollute.Particularly owing in these wastes, contain about 1~4% noble metal nickel that does not wait, and such as many other elements such as chromium, titanium, manganese, molybdenum, copper, niobium, phosphorus, and these elements are to need the element of interpolation in addition when smelting stainless steel, if directly abandon, do not recycle, will certainly cause the great wasting of resources, be unfavorable for further developing of China's stainless steel industry.Therefore, research and develop a kind of method, will bring huge economic benefit and social benefit these smelting stainless steel recovery and reuse of waste.
Summary of the invention
The objective of the invention is to make full use of the waste that smelting stainless steel produces, a kind of nickel-containing sponge iron that utilizes the smelting stainless steel waste to reclaim preparation is provided, and the preparation method of this nickel-containing sponge iron.
A kind of method of utilizing nickel-containing sponge iron to produce nickel alloy billet is provided, and is another goal of the invention of the present invention.
Because the composition in raw material smelting stainless steel waste flue dust, layer mud, the iron scale is fixing, and certain randomness is arranged, the composition content of nickel-containing sponge iron of the present invention can not be definite fully, specifically can be prepared by following method:
With one or more the arbitrary proportion mixture in the waste flue dust of smelting stainless steel, layer mud, the iron scale is raw material, weight ratio according to 100: 5~15 is mixed the back extrusion molding with coke powder, pack into the reduction jar in, add reductive agent, go into kiln at 1000~1500 ℃ of roasting reductions, obtain nickel-containing sponge iron.
Simultaneously, in the raw material of above-mentioned waste, can also add a certain amount of stainless steel cut slag, but addition should be no more than 50% of raw material gross weight.
The concrete preparation method of nickel-containing sponge iron of the present invention may further comprise the steps:
A. a kind of with in smelting stainless steel waste flue dust, layer mud, the iron scale, or several arbitrary proportion mixtures is raw material, and the weight ratio according to 100: 5~15 is with after coke powder mixes, and crude green body is made in extrusion molding in the extrusion machine of packing into.
Before extrusion molding system crude green body, can also in raw material, add the stainless steel cut slag that is no more than raw material gross weight 50%, and mix, coextrude them into crude green body.
The extrusion machine pressure that is used for the raw material extrusion molding is 0.1~5t, according to the difference of proportion scale in the raw material, and the corresponding accommodation of doing of squeeze pressure.
B. the crude green body of making is packed in the reduction jar, add the reductive agent that accounts for crude green body weight 15~30% again.Wherein said reductive agent be by coke powder and sweetening agent according to 3~6: 1 weight ratio is mixed and made into, and sweetening agent can adopt Wingdale or rhombspar.
C. the reduction jar that installs is brought into simultaneously and smelted in the kiln, be warming up to 1000~1500 ℃, constant temperature calcining 5~10h makes nickel-containing sponge iron.
The smelting kiln that is used to prepare nickel-containing sponge iron is tunnel furnace preferably, also can adopt the smelting kiln of forms such as the side cigarette kiln or the formula kiln that contracts.
The present invention also provides a kind of nickel-containing sponge iron by following method preparation:
With one or more the arbitrary proportion mixture in the waste flue dust of smelting stainless steel, layer mud, the iron scale is raw material, weight ratio according to 100: 5~15: 0.5~5 is mixed the back extrusion molding with coke powder and borax, pack into the reduction jar in, add reductive agent, go into kiln at 1000~1500 ℃ of roasting reductions, obtain nickel-containing sponge iron.
Equally, in above-mentioned waste raw material, also can add 50% the stainless steel cut slag that is no more than the raw material gross weight.
Usually, the nickel-containing sponge iron that above-mentioned preparation method obtains, TFe content be more than 50%, and contain the Ni about 5%, can be directly uses as the raw material of smelting stainless steel.Certainly, also nickel-containing sponge iron further can be smelted and be processed into nickel alloy billet, the content of TFe and Ni is further improved after, the raw material that is re-used as smelting stainless steel uses.
The concrete preparation method of nickel alloy billet of the present invention is, nickel-containing sponge iron and ferrosilicon powder, limestone powder, powdered carbon are joined in the electric arc furnace according to 1: 0.1~0.2: 0.1~0.2: 0.1~0.2 weight ratio, smelt with the routine techniques method, make nickel alloy billet.
The nickel alloy billet that the present invention makes, TFe content is brought up to more than 80%, and Ni content is brought up to about 8%.
Adopt the preparation method of above-mentioned nickel-containing sponge iron of the present invention and nickel alloy billet, use 100t stainless steel waste raw material, finally can produce the nickel alloy billet about 70~80t.
The nickel alloy billet that the present invention makes mainly is to be applied in the stainless smelting production as raw material.
The waste that the present invention utilizes smelting stainless steel to produce is raw material, produce nickel-containing sponge iron, and then production nickel alloy billet, raw material as stainless steel smelting production, can make flue dust, layer mud, iron scale the like waste be able to the reclaiming utilization on the one hand, both solved the problem of the occupied ground of banking up for a long time, also eliminated pollution problem environment; On the other hand, the present invention has also become available stock to waste, has saved a large amount of precious resources; And use product of the present invention as the raw material smelting stainless steel, and can reduce the addition of other element in the smelting process, stainless production cost is reduced greatly.
Embodiment
Embodiment 1
Get the waste flue dust of smelting stainless steel, be crushed to the fineness that needs after, mix with the weight ratio of coke powder according to 10: 0.6, add suitable quantity of water, in the extrusion machine of packing into, become crude green body with the pressure extrusion of 0.4t.
Coke powder with after the Wingdale separated pulverizing becomes fine powder, is mixed according to 3: 1 weight ratios, make reductive agent.
The crude green body of extrusion molding is packed in the reduction jar, and every canned 25Kg that goes into adds the above-mentioned reductive agent of 6.5Kg again, is filled in the gap in the reduction jar, adds a cover.
The reduction jar that all installs brought into together be warming up in 1000 ℃ and the homothermic tunnel furnace, behind the constant temperature calcining 6h, the kiln discharge cooling is poured out product, and after removing clean remaining reductive agent attached to the surface, is obtained the nickel-containing sponge iron product from reduction jar.
Component testing analysis through to the said products contains TFe 56.27%, and Ni 5.36%, and Cr 7.43%, and S 0.28%, and P 0.15%, and C 0.22%.
Embodiment 2
Get the waste flue dust and the iron scale of smelting stainless steel, separated pulverizing is to the fineness that needs, with coke powder, borax according to 6: 4: 1.2: after 0.1 weight ratio mixes, add suitable quantity of water, in the extrusion machine of packing into, become crude green body with the pressure extrusion of 1t.
Coke powder with after the Wingdale separated pulverizing becomes fine powder, is mixed according to 4: 1 weight ratios, make reductive agent.
The crude green body of extrusion molding is packed in the reduction jar, and every canned 25Kg that goes into adds the above-mentioned reductive agent of 4Kg again, is filled in the gap in the reduction jar, adds a cover.
The reduction jar that all installs brought into together be warming up in 1300 ℃ and the homothermic tunnel furnace, behind the constant temperature calcining 5h, the kiln discharge cooling is poured out product, and after removing clean remaining reductive agent attached to the surface, is obtained the nickel-containing sponge iron product from reduction jar.
Component testing analysis through to the said products contains TFe 55.36%, and Ni 5.22%, and Cr 8.11%, and S 0.17%, and P 0.12%, and C 0.26%.
Embodiment 3
Get the waste iron scale of smelting stainless steel, and the stainless steel cut slag, separated pulverizing is to the fineness that needs, and after mixing according to 7: 3: 1 weight ratio with coke powder, adds suitable quantity of water, in the extrusion machine of packing into, becomes crude green body with the pressure extrusion of 2.5t.
Coke powder with after the Wingdale separated pulverizing becomes fine powder, is mixed according to 5: 1 weight ratios, make reductive agent.
The crude green body of extrusion molding is packed in the reduction jar, and every canned 25Kg that goes into adds the above-mentioned reductive agent of 4.5Kg again, is filled in the gap in the reduction jar, adds a cover.
The reduction jar that all installs brought into together be warming up in 1350 ℃ and the homothermic tunnel furnace, behind the constant temperature calcining 6h, the kiln discharge cooling is poured out product, and after removing clean remaining reductive agent attached to the surface, is obtained the nickel-containing sponge iron product from reduction jar.
Component testing analysis through to the said products contains TFe 54.13%, and Ni 6.21%, and Cr 8.47%, and S 0.05%, and P 0.19%, and C 0.16%.
Embodiment 4
Get the waste layer mud and the iron scale of smelting stainless steel, and the stainless steel cut slag, separated pulverizing is to the fineness that needs, with coke powder, borax according to 4: 3: 3: after 1.2: 0.2 weight ratio mixes, add suitable quantity of water, in the extrusion machine of packing into, become crude green body with the pressure extrusion of 1.2t.
Coke powder with after the rhombspar separated pulverizing becomes fine powder, is mixed according to 4: 1 weight ratios, make reductive agent.
The crude green body of extrusion molding is packed in the reduction jar, and every canned 25Kg that goes into adds the above-mentioned reductive agent of 6Kg again, is filled in the gap in the reduction jar, adds a cover.
The reduction jar that all installs brought into together be warming up in 1400 ℃ and the homothermic tunnel furnace, behind the constant temperature calcining 8h, the kiln discharge cooling is poured out product, and after removing clean remaining reductive agent attached to the surface, is obtained the nickel-containing sponge iron product from reduction jar.
Component testing analysis through to the said products contains TFe 54.12%, and Ni 6.03%, and Cr 7.29%, and S 0.21%, and P 0.09%, and C 0.24%.
Embodiment 5
Get the waste flue dust and the layer mud of smelting stainless steel, and the stainless steel cut slag, separated pulverizing is to the fineness that needs, with coke powder, borax according to 4: 2: 4: after 1.5: 0.4 weight ratio mixes, add suitable quantity of water, in the extrusion machine of packing into, become crude green body with the pressure extrusion of 1.5t.
Coke powder with after the rhombspar separated pulverizing becomes fine powder, is mixed according to 5: 1 weight ratios, make reductive agent.
The crude green body of extrusion molding is packed in the reduction jar, and every canned 25Kg that goes into adds the above-mentioned reductive agent of 5.5Kg again, is filled in the gap in the reduction jar, adds a cover.
The reduction jar that all installs brought into together be warming up in 1350 ℃ and the homothermic tunnel furnace, behind the constant temperature calcining 8h, the kiln discharge cooling is poured out product, and after removing clean remaining reductive agent attached to the surface, is obtained the nickel-containing sponge iron product from reduction jar.
Component testing analysis through to the said products contains TFe 51.96%, and Ni 5.75%, and Cr 7.43%, and S 0.25%, and P 0.17%, and C 0.15%.
Embodiment 6
Get waste flue dust, layer mud and the iron scale of smelting stainless steel, separated pulverizing is to the fineness that needs, with coke powder according to 5: 2: 3: after 1.2 weight ratio mixes, add suitable quantity of water, in the extrusion machine of packing into, become crude green body with the pressure extrusion of 1t.
Coke powder with after the Wingdale separated pulverizing becomes fine powder, is mixed according to 6: 1 weight ratios, make reductive agent.
The crude green body of extrusion molding is packed in the reduction jar, and every canned 25Kg that goes into adds the above-mentioned reductive agent of 5Kg again, is filled in the gap in the reduction jar, adds a cover.
The reduction jar that all installs brought into together be warming up in 1300 ℃ and the homothermic tunnel furnace, behind the constant temperature calcining 8h, the kiln discharge cooling is poured out product, and after removing clean remaining reductive agent attached to the surface, is obtained the nickel-containing sponge iron product from reduction jar.
Component testing analysis through to the said products contains TFe 53.27%, and Ni 6.13%, and Cr 7.36%, and S 0.06%, and P 0.12%, and C 0.20%.
Embodiment 7
Get waste flue dust, layer mud and the iron scale of smelting stainless steel, and stainless steel cut slag, separated pulverizing is to the fineness that needs, with coke powder, borax according to 3: 2: 2: after 3: 1.4: 0.3 weight ratio mixes, add suitable quantity of water, pack in the extrusion machine, become crude green body with the pressure extrusion of 1.8t.
Coke powder with after the Wingdale separated pulverizing becomes fine powder, is mixed according to 4.5: 1 weight ratios, make reductive agent.
The crude green body of extrusion molding is packed in the reduction jar, and every canned 25Kg that goes into adds the above-mentioned reductive agent of 6Kg again, is filled in the gap in the reduction jar, adds a cover.
The reduction jar that all installs brought into together be warming up in 1250 ℃ and the homothermic tunnel furnace, behind the constant temperature calcining 10h, the kiln discharge cooling is poured out product, and after removing clean remaining reductive agent attached to the surface, is obtained the nickel-containing sponge iron product from reduction jar.
Component testing analysis through to the said products contains TFe 59.37%, and Ni 6.83%, and Cr 8.11%, and S 0.13%, and P 0.21%, and C 0.17%.
Embodiment 8
Get embodiment 1 nickel-containing sponge iron product 4t, ferrosilicon powder 0.5t, Wingdale 0.5t, powdered carbon 0.5t adds in the electric arc furnace together, smelts according to the routine techniques method, and pouring molten steel is become nickel alloy billet.Every use 100t waste raw material can be produced about nickel alloy billet 82t in this example.
Component testing analysis through to the said products contains TFe 82.57%, and Ni 7.62%, and Cr 10.35%.
Embodiment 9
Get embodiment 5 nickel-containing sponge iron product 4t, ferrosilicon powder 0.6t, Wingdale 0.6t, powdered carbon 0.6t adds in the electric arc furnace together, smelts according to the routine techniques method, and pouring molten steel is become nickel alloy billet.Every use 100t waste raw material can be produced about nickel alloy billet 87t in this example.
Component testing analysis through to the said products contains TFe 87.18%, and Ni 8.55%, and Cr 11.24%.
Embodiment 10
Get embodiment 7 nickel-containing sponge iron product 3.5t, ferrosilicon powder 0.5t, Wingdale 0.5t, powdered carbon 0.5t adds in the electric arc furnace together, smelts according to the routine techniques method, and pouring molten steel is become nickel alloy billet.Every use 100t waste raw material can be produced about nickel alloy billet 89t in this example.
Component testing analysis through to the said products contains TFe 88.82%, and Ni 9.64%, and Cr 10.85%.

Claims (10)

1, a kind of nickel-containing sponge iron, it is formed and is uncertain, can be prepared by following method:
With one or more the arbitrary proportion mixture in the waste flue dust of smelting stainless steel, layer mud, the iron scale is raw material, weight ratio according to 100: 5~15 is mixed the back extrusion molding with coke powder, pack into the reduction jar in, add reductive agent, go into kiln at 1000~1500 ℃ of roasting reductions, obtain nickel-containing sponge iron.
2, nickel-containing sponge iron according to claim 1 is characterized in that can also adding the stainless steel cut slag in raw material, and its addition is no more than 50% of raw material gross weight.
3, a kind of method for preparing claim 1 or 2 nickel-containing sponge irons may further comprise the steps:
A. a kind of with in smelting stainless steel waste flue dust, layer mud, the iron scale, or several arbitrary proportion mixtures is a raw material, and adding is no more than the stainless steel cut slag of raw material gross weight 50%, perhaps do not add the stainless steel cut slag, weight ratio according to 100: 5~15 is with after coke powder mixes, and crude green body is made in extrusion molding;
B. crude green body is packed in the reduction jar, add the reductive agent that accounts for crude green body weight 15~30%;
C. the reduction jar is gone into kiln, is warming up to 1000~1500 ℃, and constant temperature calcining 5~10h makes nickel-containing sponge iron.
4, preparation nickel-containing sponge iron method according to claim 3, it is characterized in that described reductive agent be by coke powder and sweetening agent according to 3~6: 1 weight ratio is mixed and made into, and sweetening agent wherein adopts Wingdale or rhombspar.
5, preparation nickel-containing sponge iron method according to claim 3 is characterized in that preparing a kind of as in tunnel furnace, side cigarette kiln or the formula kiln that contracts of smelting kiln that nickel-containing sponge iron uses.
6, preparation nickel-containing sponge iron method according to claim 3 is characterized in that the pressure with 0.1~5t is crude green body with the raw material extrusion molding.
7, a kind of nickel-containing sponge iron, it is formed and is uncertain, can be prepared by following method:
With one or more the arbitrary proportion mixture in the waste flue dust of smelting stainless steel, layer mud, the iron scale is raw material, weight ratio according to 100: 5~15: 0.5~5 is mixed the back extrusion molding with coke powder and borax, pack into the reduction jar in, add reductive agent, go into kiln at 1000~1500 ℃ of roasting reductions, obtain nickel-containing sponge iron.
8, nickel-containing sponge iron according to claim 7 is characterized in that can also adding the stainless steel cut slag in raw material, and its addition is no more than 50% of raw material gross weight.
9, a kind of method of producing nickel alloy billet, be claim 1,2 or 7,8 nickel-containing sponge iron and ferrosilicon powder, limestone powder, powdered carbon to be joined in the electric arc furnace according to 1: 0.1~0.2: 0.1~0.2: 0.1~0.2 weight ratio smelt, make nickel alloy billet.
10, the application of the nickel alloy billet of claim 9 in smelting stainless steel.
CNB2004100924025A 2004-12-10 2004-12-10 Nickel-containing sponge iron, and its preparing method and method for producing nickel alloy billet Expired - Fee Related CN1312297C (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102321799A (en) * 2011-08-26 2012-01-18 沈阳博联特熔融还原科技有限公司 Method for preventing directly reduced metallic pellets from bonding
CN102321777A (en) * 2011-08-26 2012-01-18 沈阳博联特熔融还原科技有限公司 Method for reducing iron
CN102676724A (en) * 2012-06-11 2012-09-19 山西英之杰物资有限公司 Method for manufacturing sponge iron
CN104561525A (en) * 2015-01-30 2015-04-29 福建绿能资源再生科技有限公司 Heavy metal sludge recycling and comprehensive utilization method
CN111206143A (en) * 2020-03-04 2020-05-29 湖州盛特隆金属制品有限公司 Method for smelting stainless steel mother liquor by using stainless steel ash

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB934980A (en) * 1959-01-15 1963-08-21 Tohoku Denka Kogyo Kabushiki K A process for producing sponge iron
CN1033648A (en) * 1987-12-22 1989-07-05 鞍山钢铁学院 Iron scale in shaft furnace with the coke powder clean sponge iron of original production also
CN1212410C (en) * 2002-05-15 2005-07-27 张美焦 Method for realizing zero exhaust for fully steelmaking of steel dust and mud

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102321799A (en) * 2011-08-26 2012-01-18 沈阳博联特熔融还原科技有限公司 Method for preventing directly reduced metallic pellets from bonding
CN102321777A (en) * 2011-08-26 2012-01-18 沈阳博联特熔融还原科技有限公司 Method for reducing iron
CN102676724A (en) * 2012-06-11 2012-09-19 山西英之杰物资有限公司 Method for manufacturing sponge iron
CN104561525A (en) * 2015-01-30 2015-04-29 福建绿能资源再生科技有限公司 Heavy metal sludge recycling and comprehensive utilization method
CN111206143A (en) * 2020-03-04 2020-05-29 湖州盛特隆金属制品有限公司 Method for smelting stainless steel mother liquor by using stainless steel ash
CN111206143B (en) * 2020-03-04 2021-10-08 湖州盛特隆金属制品有限公司 Method for smelting stainless steel mother liquor by using stainless steel ash

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