CN109321812A - A method of steel additive agent is prepared by raw material of steel scrap - Google Patents
A method of steel additive agent is prepared by raw material of steel scrap Download PDFInfo
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- CN109321812A CN109321812A CN201811502607.4A CN201811502607A CN109321812A CN 109321812 A CN109321812 A CN 109321812A CN 201811502607 A CN201811502607 A CN 201811502607A CN 109321812 A CN109321812 A CN 109321812A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C35/00—Master alloys for iron or steel
-
- 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
- C21C7/0006—Adding metallic additives
-
- 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
- C21C7/06—Deoxidising, e.g. killing
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master alloys
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses a kind of methods for preparing steel additive agent as raw material using steel scrap, the steel additive agent is made of following raw material: 95 parts of steel scrap, 15 parts of iron ore, 17 parts of metallic aluminium, 12 parts of graphite, 13 parts of ferrosilicon powder, 25 parts of aluminum oxide, 7 parts of silication manganese, 3 parts and 5 parts of antimony oxide of bismuth, the present invention is scientific and reasonable, it is safe and convenient to use, by making steel additive agent using steel scrap, the waste of iron and steel resource can be effectively reduced, improve the utilization rate of steel, by the way that iron ore is added in steel additive agent, the fierce of decarburizing reaction can be effectively facilitated to carry out, it can make the more abundant of smelting iron and steel, so that the impurity content in steel greatly reduces, effectively improve the performance of steel, by the way that metallic aluminium is added in steel additive agent, the steel that needs can be smelted Sufficient deoxidation treatment is carried out, the oxygen content in steel can be made to reduce, improves intensity, the consistency and elasticity of steel.
Description
Technical field
The present invention relates to steel scrap processing technology field, specially a kind of side that steel additive agent is prepared using steel scrap as raw material
Method.
Background technique
Steel scrap, refer in steel plant's production process not as the ferrous waste of product and the equipment scrapped after and
Steel material in component, ingredient are the steel scrap that cries of steel, and ingredient is the scrap iron that cries of the pig iron, are referred to as steel scrap, steel scrap is in metallurgy industry
In utilization rate it is lower, will cause the waste of resource, so, people make steel additive agent using steel scrap, still, using useless
During steel makes steel additive agent, has the disadvantage in that since more greasy dirt and rusty stain are contained in steel scrap surface, will lead to
Contain iron rust ingredient after completing in steel additive agent, when being added in steel, the performance that will lead to steel changes,
Also, during the steel additive agent made using steel scrap, steel needs melt in the case where superhigh temperature, also, can
Can there are problems that cmpletely restoring, cause steel toughness poor, so, people be badly in need of it is a kind of it is novel with steel scrap be former
Material prepares the method for steel additive agent to solve the above problems.
Summary of the invention
The present invention provides a kind of method for preparing steel additive agent as raw material using steel scrap, can effectively solve above-mentioned background skill
Itd is proposed in art since more greasy dirt and rusty stain are contained in steel scrap surface, will lead to and contain in steel additive agent after completing
Iron rust ingredient, when being added in steel, the performance that will lead to steel changes, also, adds in the steel made using steel scrap
During adding agent, steel needs melt in the case where superhigh temperature, also it is possible to ask in the presence of what can not cmpletely be restored
Topic, the problem for causing steel toughness poor.
To achieve the above object, the invention provides the following technical scheme: a kind of steel additive agent, the steel additive agent by
Following raw material is made: 90-100 parts of steel scrap, 10-20 parts of iron ore, 15-20 parts of metallic aluminium, 10-15 parts of graphite, ferrosilicon
10-15 parts of powder, 20-30 parts of aluminum oxide, 5-10 parts of silication manganese, 2-5 parts of bismuth and 3-7 parts of antimony oxide.
According to the above technical scheme, the steel additive agent is made of following raw material: 95 parts of steel scrap, iron ore 15
Part, 17 parts of metallic aluminium, 12 parts of graphite, 13 parts of ferrosilicon powder, 25 parts of aluminum oxide, 7 parts of silication manganese, 3 parts of bismuth and antimony oxide 5
Part.
A method of steel additive agent being prepared by raw material of steel scrap, is included the following steps:
S1, cleaning: the iron rust and greasy dirt on steel scrap surface are started the cleaning processing using oxalic acid and greasy dirt detergent；
S2, it is crushed: break process being carried out to the steel scrap after cleaning using scrap steel crusher；
S3, magnetic separation: the steel scrap after break process is added in magnetic separator, carries out magnetic separation processing to steel scrap；
S4, preheating: toasting steel scrap using flame, removes the grease and moisture on surface；
S5, smelting: the steel scrap after processing is sequentially added in electric arc furnaces with remaining raw material according to parts by weight, is powered
It smelts；
S6, stirring: being constantly passed through nitrogen during smelting into electric arc furnaces, using gas to the gold in electric arc furnaces
Belong to liquid to be stirred；
S7, cooling: after the completion of smelting, being passed through nitrogen into molten metal again, using nitrogen to the molten metal after smelting into
Row stirring cools, and forms steel additive agent finished product.
According to the above technical scheme, in the step S1, oxalic acid is added into steel brush cleaning machine, it is clear that steel scrap is put into steel brush
It in washing machine, is cleaned using iron rust of the steel brush cleaning machine to steel scrap surface, the pH value 4.5-5.5 of the oxalic acid, the cleaning
Then greasy dirt detergent is added into steel brush cleaning agent in Shi Changwei 20min, steel scrap is put into steel brush cleaning machine, steel brush is utilized
Cleaning machine cleans the greasy dirt on steel scrap surface, when cleaning a length of 20min, finally, being stained with using clear water to steel scrap surface
The oxalic acid and greasy dirt detergent of dye are cleaned, and the wash number is 1-3 times.
According to the above technical scheme, in the step S2, the steel scrap after cleaning is added in scrap steel crusher, using useless
Steel crusher carries out break process to steel scrap, and the particle diameter after the steel scrap is broken is 5-10mm, and broken using steel scrap
Machine carries out break process to iron ore, metallic aluminium and graphite, the particle diameter after the iron ore, metallic aluminium and graphite are broken
It is 2-6mm.
According to the above technical scheme, in the step S3, steel scrap and iron ore after being crushed sequentially add magnetic separator
In, magnetic separation processing is carried out to steel scrap and iron ore using magnetic separator, the impurity in steel scrap and iron ore is removed, so magnetic separation duration
For 30-40min.
According to the above technical scheme, in the step S4, the steel scrap after magnetic separation is uniformly placed on flame drying oven
Steel scrap surface is toasted using the thermal-flame inside drying oven in inside, and the flame drying temperature is 600-800 DEG C,
The drying time period is 15-20min.
According to the above technical scheme, in the step S5, by after over cleaning, broken, magnetic separation and preheating steel scrap and
Iron ore, metallic aluminium, graphite, ferrosilicon powder, aluminum oxide, silication manganese, bismuth and antimony oxide sequentially add in electric arc furnaces, electricity
Arc furnace, which is powered, to be smelted, and the smelting temperature is 1900-2300 DEG C, when smelting a length of 90min.
According to the above technical scheme, in the step S6, during smelting, nitrogen is constantly passed through into electric arc furnaces
Gas carries out Gas Stirring to the molten metal in smelting process using nitrogen.
According to the above technical scheme, in the step S7, by smelt complete after molten metal pour into container, again to
It is passed through nitrogen in molten metal, drives molten metal fast cooling using the stirring of nitrogen, after cooling down completely to molten metal, forms steel
Iron additive finished product.
Beneficial effects of the present invention: the present invention is scientific and reasonable, safe and convenient to use, is added by making steel using steel scrap
Agent can effectively reduce the waste of iron and steel resource, the utilization rate of steel be improved, by the way that iron ore is added in steel additive agent
Stone can be effectively facilitated the fierce of decarburizing reaction and carry out, so that steel is during adding steel additive agent and being smelted,
It can make the more abundant of smelting iron and steel, so that the impurity content in steel greatly reduces, effectively improve steel
Performance can carry out sufficient deoxidation treatment to the steel smelted of needs by the way that metallic aluminium is added in steel additive agent, can be with
So that the oxygen content in steel reduces, intensity, the consistency and elasticity of steel are improved, by the way that silication is added in steel additive agent
Manganese can be covered and be kept the temperature to the molten steel after melting so that molten steel cooling velocity reduce, convenient for molten steel carry out at
During producing to steel additive agent, by starting the cleaning processing to steel scrap, steel scrap table can be effectively removed in type
The rusty stain and greasy dirt in face avoid steel scrap from occurring quick-fried furnace phenomenon during smelting, ensure that the safety during scrap smelting
Performance can remove the grease and moisture on steel scrap surface, so that in the process for smelting steel scrap by carrying out the pre-heat treatment to steel scrap
In it is more safe, the steel additive agent performance to complete is more preferably.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, with reality of the invention
It applies example to be used to explain the present invention together, not be construed as limiting the invention.
In the accompanying drawings:
Fig. 1 is preparation method flow diagram of the present invention.
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein
Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
Embodiment 1: as shown in Figure 1, the present invention provides a kind of technical solution, a kind of steel additive agent, steel additive agent by
Following raw material is made: 95 parts of steel scrap, 15 parts of iron ore, 17 parts of metallic aluminium, 12 parts of graphite, 13 parts of ferrosilicon powder, three oxidations
Two 25 parts of aluminium, 7 parts of silication manganese, 3 parts of bismuth and 5 parts of antimony oxide.
A method of steel additive agent being prepared by raw material of steel scrap, is included the following steps:
S1, cleaning: the iron rust and greasy dirt on steel scrap surface are started the cleaning processing using oxalic acid and greasy dirt detergent；
S2, it is crushed: break process being carried out to the steel scrap after cleaning using scrap steel crusher；
S3, magnetic separation: the steel scrap after break process is added in magnetic separator, carries out magnetic separation processing to steel scrap；
S4, preheating: toasting steel scrap using flame, removes the grease and moisture on surface；
S5, smelting: the steel scrap after processing is sequentially added in electric arc furnaces with remaining raw material according to parts by weight, is powered
It smelts；
S6, stirring: being constantly passed through nitrogen during smelting into electric arc furnaces, using gas to the gold in electric arc furnaces
Belong to liquid to be stirred；
S7, cooling: after the completion of smelting, being passed through nitrogen into molten metal again, using nitrogen to the molten metal after smelting into
Row stirring cools, and forms steel additive agent finished product.
According to the above technical scheme, in step S1, oxalic acid is added into steel brush cleaning machine, steel scrap is put into steel brush cleaning machine
In, cleaned using iron rust of the steel brush cleaning machine to steel scrap surface, the pH value 4.5 of oxalic acid, when cleaning a length of 20min, then,
Greasy dirt detergent is added into steel brush cleaning agent, steel scrap is put into steel brush cleaning machine, using steel brush cleaning machine to steel scrap surface
Greasy dirt cleaned, when cleaning a length of 20min, finally, using clear water to the oxalic acid and greasy dirt detergent of steel scrap surface contamination
It is cleaned, wash number is 3 times.
According to the above technical scheme, in step S2, the steel scrap after cleaning is added in scrap steel crusher, it is broken using steel scrap
Broken machine carries out break process to steel scrap, and the particle diameter after steel scrap is broken is 5mm, and using scrap steel crusher to iron ore,
Metallic aluminium and graphite carry out break process, and the particle diameter after iron ore, metallic aluminium and graphite are broken is 2mm.
According to the above technical scheme, in step S3, steel scrap and iron ore after being crushed are sequentially added in magnetic separator, benefit
Magnetic separation processing is carried out to steel scrap and iron ore with magnetic separator, the impurity in steel scrap and iron ore is removed, so a length of 30- when magnetic separation
40min。
According to the above technical scheme, in step S4, the steel scrap after magnetic separation is uniformly placed on inside flame drying oven,
Steel scrap surface is toasted using the thermal-flame inside drying oven, flame drying temperature is 800 DEG C, and drying time period is
20min。
According to the above technical scheme, in step S5, by the steel scrap and iron ore after over cleaning, broken, magnetic separation and preheating
Stone, metallic aluminium, graphite, ferrosilicon powder, aluminum oxide, silication manganese, bismuth and antimony oxide sequentially add in electric arc furnaces, electric arc furnaces
Be powered and smelt, smelting temperature is 2300 DEG C, when smelting a length of 90min.
According to the above technical scheme, in step S6, during smelting, nitrogen is constantly passed through into electric arc furnaces, benefit
Gas Stirring is carried out to the molten metal in smelting process with nitrogen.
According to the above technical scheme, in step S7, the molten metal smelted after completing is poured into container, again to metal
It is passed through nitrogen in liquid, drives molten metal fast cooling using the stirring of nitrogen, after being cooled down completely to molten metal, forms steel and adds
Add agent finished product.
Embodiment 2: as shown in Figure 1, the present invention provides a kind of technical solution, a kind of steel additive agent, steel additive agent by
Following raw material is made: 90 parts of steel scrap, 10 parts of iron ore, 15 parts of metallic aluminium, 10 parts of graphite, 10 parts of ferrosilicon powder, three oxidations
Two 20 parts of aluminium, 5 parts of silication manganese, 2 parts of bismuth and 3 parts of antimony oxide.
A method of steel additive agent being prepared by raw material of steel scrap, is included the following steps:
S1, cleaning: the iron rust and greasy dirt on steel scrap surface are started the cleaning processing using oxalic acid and greasy dirt detergent；
S2, it is crushed: break process being carried out to the steel scrap after cleaning using scrap steel crusher；
S3, magnetic separation: the steel scrap after break process is added in magnetic separator, carries out magnetic separation processing to steel scrap；
S4, preheating: toasting steel scrap using flame, removes the grease and moisture on surface；
S5, smelting: the steel scrap after processing is sequentially added in electric arc furnaces with remaining raw material according to parts by weight, is powered
It smelts；
S6, stirring: being constantly passed through nitrogen during smelting into electric arc furnaces, using gas to the gold in electric arc furnaces
Belong to liquid to be stirred；
S7, cooling: after the completion of smelting, being passed through nitrogen into molten metal again, using nitrogen to the molten metal after smelting into
Row stirring cools, and forms steel additive agent finished product.
According to the above technical scheme, in step S1, oxalic acid is added into steel brush cleaning machine, steel scrap is put into steel brush cleaning machine
In, cleaned using iron rust of the steel brush cleaning machine to steel scrap surface, the pH value 5 of oxalic acid, when cleaning a length of 20min, then, to
Greasy dirt detergent is added in steel brush cleaning agent, steel scrap is put into steel brush cleaning machine, using steel brush cleaning machine to steel scrap surface
Greasy dirt is cleaned, when cleaning a length of 20min, finally, using clear water to the oxalic acid of steel scrap surface contamination and greasy dirt detergent into
Row cleaning, wash number are 2 times.
According to the above technical scheme, in step S2, the steel scrap after cleaning is added in scrap steel crusher, it is broken using steel scrap
Broken machine carries out break process to steel scrap, and the particle diameter after steel scrap is broken is 7mm, and using scrap steel crusher to iron ore,
Metallic aluminium and graphite carry out break process, and the particle diameter after iron ore, metallic aluminium and graphite are broken is 4mm.
According to the above technical scheme, in step S3, steel scrap and iron ore after being crushed are sequentially added in magnetic separator, benefit
Magnetic separation processing is carried out to steel scrap and iron ore with magnetic separator, the impurity in steel scrap and iron ore is removed, so a length of 30- when magnetic separation
40min。
According to the above technical scheme, in step S4, the steel scrap after magnetic separation is uniformly placed on inside flame drying oven,
Steel scrap surface is toasted using the thermal-flame inside drying oven, flame drying temperature is 700 DEG C, and drying time period is
17min。
According to the above technical scheme, in step S5, by the steel scrap and iron ore after over cleaning, broken, magnetic separation and preheating
Stone, metallic aluminium, graphite, ferrosilicon powder, aluminum oxide, silication manganese, bismuth and antimony oxide sequentially add in electric arc furnaces, electric arc furnaces
Be powered and smelt, smelting temperature is 2100 DEG C, when smelting a length of 90min.
According to the above technical scheme, in step S6, during smelting, nitrogen is constantly passed through into electric arc furnaces, benefit
Gas Stirring is carried out to the molten metal in smelting process with nitrogen.
According to the above technical scheme, in step S7, the molten metal smelted after completing is poured into container, again to metal
It is passed through nitrogen in liquid, drives molten metal fast cooling using the stirring of nitrogen, after being cooled down completely to molten metal, forms steel and adds
Add agent finished product.
Embodiment 3: as shown in Figure 1, the present invention provides a kind of technical solution, a kind of steel additive agent, steel additive agent by
Following raw material is made: 100 parts of steel scrap, 20 parts of iron ore, 20 parts of metallic aluminium, 15 parts of graphite, 15 parts of ferrosilicon powder, three oxidations
Two 30 parts of aluminium, 10 parts of silication manganese, 5 parts of bismuth and 7 parts of antimony oxide.
A method of steel additive agent being prepared by raw material of steel scrap, is included the following steps:
S1, cleaning: the iron rust and greasy dirt on steel scrap surface are started the cleaning processing using oxalic acid and greasy dirt detergent；
S2, it is crushed: break process being carried out to the steel scrap after cleaning using scrap steel crusher；
S3, magnetic separation: the steel scrap after break process is added in magnetic separator, carries out magnetic separation processing to steel scrap；
S4, preheating: toasting steel scrap using flame, removes the grease and moisture on surface；
S5, smelting: the steel scrap after processing is sequentially added in electric arc furnaces with remaining raw material according to parts by weight, is powered
It smelts；
S6, stirring: being constantly passed through nitrogen during smelting into electric arc furnaces, using gas to the gold in electric arc furnaces
Belong to liquid to be stirred；
S7, cooling: after the completion of smelting, being passed through nitrogen into molten metal again, using nitrogen to the molten metal after smelting into
Row stirring cools, and forms steel additive agent finished product.
According to the above technical scheme, in step S1, oxalic acid is added into steel brush cleaning machine, steel scrap is put into steel brush cleaning machine
In, cleaned using iron rust of the steel brush cleaning machine to steel scrap surface, the pH value 5.5 of oxalic acid, when cleaning a length of 20min, then,
Greasy dirt detergent is added into steel brush cleaning agent, steel scrap is put into steel brush cleaning machine, using steel brush cleaning machine to steel scrap surface
Greasy dirt cleaned, when cleaning a length of 20min, finally, using clear water to the oxalic acid and greasy dirt detergent of steel scrap surface contamination
It is cleaned, wash number is 1 time.
According to the above technical scheme, in step S2, the steel scrap after cleaning is added in scrap steel crusher, it is broken using steel scrap
Broken machine carries out break process to steel scrap, and the particle diameter after steel scrap is broken is 10mm, and using scrap steel crusher to iron ore,
Metallic aluminium and graphite carry out break process, and the particle diameter after iron ore, metallic aluminium and graphite are broken is 6mm.
According to the above technical scheme, in step S3, steel scrap and iron ore after being crushed are sequentially added in magnetic separator, benefit
Magnetic separation processing is carried out to steel scrap and iron ore with magnetic separator, the impurity in steel scrap and iron ore is removed, so a length of 30- when magnetic separation
40min。
According to the above technical scheme, in step S4, the steel scrap after magnetic separation is uniformly placed on inside flame drying oven,
Steel scrap surface is toasted using the thermal-flame inside drying oven, flame drying temperature is 600 DEG C, and drying time period is
15min。
According to the above technical scheme, in step S5, by the steel scrap and iron ore after over cleaning, broken, magnetic separation and preheating
Stone, metallic aluminium, graphite, ferrosilicon powder, aluminum oxide, silication manganese, bismuth and antimony oxide sequentially add in electric arc furnaces, electric arc furnaces
Be powered and smelt, smelting temperature is 1900 DEG C, when smelting a length of 90min.
According to the above technical scheme, in step S6, during smelting, nitrogen is constantly passed through into electric arc furnaces, benefit
Gas Stirring is carried out to the molten metal in smelting process with nitrogen.
According to the above technical scheme, in step S7, the molten metal smelted after completing is poured into container, again to metal
It is passed through nitrogen in liquid, drives molten metal fast cooling using the stirring of nitrogen, after being cooled down completely to molten metal, forms steel and adds
Add agent finished product.
By detecting to steel additive agent made by embodiment 1-3, following testing result is obtained:
| Detection project | Embodiment one | Embodiment two | Embodiment three |
| Rust content (%) | 0.058 | 0.096 | 0.124 |
| Impurity content (%) | 0.136 | 0.189 | 0.206 |
| Steel scrap utilization rate (%) | 98.36 | 97.58 | 97.15 |
It is can be found that by being compared to testing result: by the rusty stain using the lower oxalic acid of pH value to steel scrap surface
It starts the cleaning processing, the rust content in steel additive agent can be effectively reduced, the performance of steel additive agent is improved, by right
The broken grain fineness of steel scrap is reduced, and the utilization rate of steel scrap can be effectively improved, meanwhile, steel can be effectively reduced
Impurity content in additive can effectively improve the quality of steel additive agent.
Based on above-mentioned, the present invention has the advantages that the present invention is scientific and reasonable, it is safe and convenient to use, pass through the steel scrap system of utilization
Make steel additive agent, the waste of iron and steel resource can be effectively reduced, the utilization rate of steel is improved, by steel additive agent
Middle addition iron ore can be effectively facilitated the fierce of decarburizing reaction and carry out, so that steel carries out smelting in addition steel additive agent
During refining, the more abundant of smelting iron and steel can be made, so that the impurity content in steel greatly reduces, effectively mentioned
The high performance of steel, by the way that metallic aluminium is added in steel additive agent, the steel that can be smelted to needs is adequately taken off
Oxygen processing, can make the oxygen content in steel reduce, intensity, the consistency and elasticity of steel be improved, by steel additive agent
Middle addition silication manganese can be covered and be kept the temperature to the molten steel after melting, so that molten steel cooling velocity reduces, convenient for steel
Water is formed, and during producing to steel additive agent, by starting the cleaning processing to steel scrap, can effectively be gone
Except the rusty stain and greasy dirt on steel scrap surface, avoids steel scrap from occurring quick-fried furnace phenomenon during smelting, ensure that scrap smelting process
In security performance the grease and moisture on steel scrap surface can be removed, so that useless smelting by carrying out the pre-heat treatment to steel scrap
More safe during steel, the steel additive agent performance to complete is more preferably.
Finally, it should be noted that being not intended to restrict the invention the foregoing is merely preferred embodiment of the invention, to the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, for those skilled in the art, still can be with
It modifies the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features.It is all
Within the spirit and principles in the present invention, any modification, equivalent replacement, improvement and so on should be included in guarantor of the invention
Within the scope of shield.
Claims (10)
1. a kind of steel additive agent, which is characterized in that the steel additive agent is made of following raw material: steel scrap 90-100
Part, 10-20 parts of iron ore, 15-20 parts of metallic aluminium, 10-15 parts of graphite, 10-15 parts of ferrosilicon powder, 20-30 parts of aluminum oxide, silicon
Manganese 5-10 parts of change, 2-5 parts of bismuth and 3-7 parts of antimony oxide.
2. a kind of steel additive agent according to claim 1, which is characterized in that the steel additive agent is by following parts by weight
Raw material is made: 95 parts of steel scrap, 15 parts of iron ore, 17 parts of metallic aluminium, 12 parts of graphite, 13 parts of ferrosilicon powder, 25 parts of aluminum oxide, silicon
7 parts of manganese of change, 3 parts of bismuth and 5 parts of antimony oxide.
3. a kind of method for preparing steel additive agent as raw material using steel scrap, which comprises the steps of:
S1, cleaning: the iron rust and greasy dirt on steel scrap surface are started the cleaning processing using oxalic acid and greasy dirt detergent；
S2, it is crushed: break process being carried out to the steel scrap after cleaning using scrap steel crusher；
S3, magnetic separation: the steel scrap after break process is added in magnetic separator, carries out magnetic separation processing to steel scrap；
S4, preheating: toasting steel scrap using flame, removes the grease and moisture on surface；
S5, smelting: the steel scrap after processing is sequentially added in electric arc furnaces with remaining raw material according to parts by weight, energization smelting
Refining；
S6, stirring: being constantly passed through nitrogen during smelting into electric arc furnaces, using gas to the molten metal in electric arc furnaces
It is stirred；
S7, cooling: after the completion of smelting, being passed through nitrogen into molten metal again, is stirred using nitrogen the molten metal after smelting
It mixes and cools, form steel additive agent finished product.
4. a kind of method for preparing steel additive agent as raw material using steel scrap according to claim 3, it is characterised in that: described
In step S1, oxalic acid is added into steel brush cleaning machine, steel scrap is put into steel brush cleaning machine, using steel brush cleaning machine to steel scrap table
The iron rust in face is cleaned, the pH value 4.5-5.5 of the oxalic acid, when cleaning a length of 20min, then, to steel brush cleaning agent
Middle addition greasy dirt detergent, steel scrap is put into steel brush cleaning machine, is carried out using greasy dirt of the steel brush cleaning machine to steel scrap surface clear
Wash, when cleaning a length of 20min, finally, cleaned using oxalic acid and greasy dirt detergent of the clear water to steel scrap surface contamination,
The wash number is 1-3 times.
5. a kind of method for preparing steel additive agent as raw material using steel scrap according to claim 3, it is characterised in that: described
In step S2, the steel scrap after cleaning is added in scrap steel crusher, break process, institute are carried out to steel scrap using scrap steel crusher
The particle diameter stated after steel scrap is crushed is 5-10mm, and is carried out brokenly using scrap steel crusher to iron ore, metallic aluminium and graphite
Broken processing, the particle diameter after the iron ore, metallic aluminium and graphite are broken is 2-6mm.
6. a kind of method for preparing steel additive agent as raw material using steel scrap according to claim 3, it is characterised in that: described
In step S3, will it is broken after steel scrap and iron ore sequentially add in magnetic separator, using magnetic separator to steel scrap and iron ore into
Row magnetic separation processing, removes the impurity in steel scrap and iron ore, so a length of 30-40min when magnetic separation.
7. a kind of method for preparing steel additive agent as raw material using steel scrap according to claim 3, it is characterised in that: described
In step S4, the steel scrap after magnetic separation is uniformly placed on inside flame drying oven, utilizes the thermal-flame inside drying oven
Steel scrap surface is toasted, the flame drying temperature is 600-800 DEG C, and the drying time period is 15-20min.
8. a kind of method for preparing steel additive agent as raw material using steel scrap according to claim 3, it is characterised in that: described
In step S5, by the steel scrap and iron ore, metallic aluminium, graphite, ferrosilicon powder, three oxygen after over cleaning, broken, magnetic separation and preheating
Change two aluminium, silication manganese, bismuth and antimony oxide to sequentially add in electric arc furnaces, electric arc furnaces, which is powered, to be smelted, and the smelting temperature is
1900-2300 DEG C, when smelting a length of 90min.
9. a kind of method for preparing steel additive agent as raw material using steel scrap according to claim 3, it is characterised in that: described
In step S6, during smelting, nitrogen is constantly passed through into electric arc furnaces, using nitrogen to the molten metal in smelting process
Carry out Gas Stirring.
10. a kind of method for preparing steel additive agent as raw material using steel scrap according to claim 3, it is characterised in that: institute
It states in step S7, the molten metal smelted after completing is poured into container, nitrogen is passed through into molten metal again, utilizes nitrogen
Stirring drives molten metal fast cooling, after cooling down completely to molten metal, forms steel additive agent finished product.
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Cited By (1)
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| CN111139333A (en) * | 2020-01-13 | 2020-05-12 | 孟庆龙 | Steelmaking method for recycling steelmaking wastes |
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