CN108531679A - A kind of technique of pure smelting scrap steel magnesium iron and gray iron casting - Google Patents
A kind of technique of pure smelting scrap steel magnesium iron and gray iron casting Download PDFInfo
- Publication number
- CN108531679A CN108531679A CN201810351696.0A CN201810351696A CN108531679A CN 108531679 A CN108531679 A CN 108531679A CN 201810351696 A CN201810351696 A CN 201810351696A CN 108531679 A CN108531679 A CN 108531679A
- Authority
- CN
- China
- Prior art keywords
- iron
- added
- steel
- carburant
- total amount
- 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.)
- Pending
Links
Classifications
-
- 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
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/08—Manufacture of cast-iron
-
- 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
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/10—Making spheroidal graphite cast-iron
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The present invention relates to a kind of techniques of pure smelting scrap steel magnesium iron and gray iron casting, it is characterised in that：It is as follows：S1：The selection of raw material；S2：The melting of steel scrap；S3：The processing of molten iron composition；S4：The inoculation of iron liquid；Prevent nodularization from failing by strictly controlling the content of sulphur in carburant in the present invention, carburant prevents carburant is premature the erosion for accelerating furnace wall is added, while also ensuring the melting efficiency of carburant by the way of the addition of multiple batches of component；By controlling the lumpiness of steel scrap, the melting efficiency of steel scrap ensure that；Steel alloy is added when iron liquid is increased to tapping temperature, reduces the loss of alloy；Nodulizer Rare-Earth Content is less than the method for 3% and instant inoculation, increases the success rate of iron liquid nodularization.
Description
Technical field
The present invention relates to casting field more particularly to a kind of techniques of pure smelting scrap steel magnesium iron and gray iron casting.
Background technology
Spheroidal graphite cast-iron is to obtain globular graphite by nodularization and inoculation, is effectively improved the mechanical performance of cast iron,
Plasticity and toughness are in particular improved, to obtain the intensity also higher than carbon steel.Casting is typically all to be carried by heat treatment normalizing
Pearlite in high matrix, to reach performance requirement.It is heat-treated cost to save, prior art is to produce the above casting
When, stokehold dispensing adds manganese, copper and tin.Although and the precious metals such as copper, tin can make casting as cast condition reach technical conditions is wanted
The metallographic structure asked and mechanical performance are to cancel heat treatment process.Although the addition of these precious metals reduces heat treatment
Technique, but production cost is still higher, and economic benefit is not notable enough.
The phosphorus content of grey cast-iron is higher（2.7%~4.0%）, the carbon mainly presence in the form of free state flake graphite,
Fracture gray, abbreviation gray iron.Fusing point is low（1145~1250 DEG C）, shrinkage is small when solidification, and compression strength and hardness are close
Carbon steel, damping property are good.It has good casting character, machinability good, anti-attrition, the notch sensitive that wearability is good, low
Property, it is at low cost, be widely used in manufacture casting of complicated structure and wearing piece in addition it melts Easy dosing, such as：Produce lathes bed
The structural members such as body, cylinder, babinet.
In recent years, more next using medium-frequency induction furnace smelting nodular cast iron part and gray iron casting in China's casting industry
More universal, simultaneously because the market price of steel scrap is cheaper than the new pig iron in general, the supply of steel scrap is also more sufficient in the market, this
Just to provide possibility with absolutely smelting scrap steel ironcasting.
Invention content
The technical problem to be solved in the present invention is to provide a kind of techniques of pure smelting scrap steel magnesium iron and gray iron casting, can solve
Certainly scrap iron is smelted into gray iron and magnesium iron manufactures the cost-effective problem of casting.
In order to solve the above technical problems, the technical scheme is that：A kind of pure smelting scrap steel magnesium iron and gray iron casting
Technique, innovative point are：It is as follows：
S1：The selection of raw material：It is >=95% to choose fixed carbon content, and sulfur content is less than 0.6%, and absorptivity is 80% or more, granularity
For the carburant of 1mm-5mm；Selection alloy content is low, and composition is accurate, and cleaning is become rusty less without greasy dirt, the carbon of lumpiness 50mm-100mm
Steel is as the furnace charge for producing magnesium iron and gray iron；Choose silicone content 70%-80% silicon content of iron and manganese 60%-70% ferromanganese；
S2：The melting of steel scrap：The steel scrap chosen is put into electric induction furnace, the electric current whirlpool generated by electric induction furnace adds
Hot steel scrap forms molten iron, and electric induction furnace makes molten iron composition be evenly distributed in electric induction furnace from stirring；
S3：The processing of molten iron composition：Before carbon steel is smelted into molten iron completely, the carburetting chosen at least is added in two portions
Agent；Ferrosilicon and ferromanganese is successively added in the 1min-2min after carbon steel is smelted into molten iron completely；
S4：The inoculation of iron liquid：When producing gray iron, the inovulant of 0.3%-1.2% is added into iron liquid；When producing magnesium iron, to
The nodulizer of 0.8%-1.2% and the content of rare earth 2%-3% of nodulizer are added in iron liquid, is bred using stokehold and is mutually tied with instant inoculation
The method of conjunction.
Further, before the steel scrap is completely melt, the 30%-45% for the carburant total amount chosen is added for the first time, waits for
When first carburant being added is dissolved in molten iron, the 50%-60% for the carburant total amount chosen is added for the second time；Steel scrap is completely melt
1min-2min is added the 80%-90% for the ferrosilicon total amount chosen, the 85%-95% for the ferromanganese total amount chosen is added afterwards；Wait for first
When the ferrosilicon and ferromanganese of addition are incorporated in molten iron, according to required composition with test as a result, the carburetting chosen is added for the third time
The 5%-10% of agent total amount, the 10-20% that the ferrosilicon total amount chosen is added for the second time, the 5%- that the ferromanganese total amount chosen is added
15%。
Further, the inovulant that the production HT200 is added is 0.3%-0.5%；Producing the inovulant that HT250 is added is
0.4%-0.8%, the inovulant that production HT300 is added are 0.5%-1.2%.
The advantage of the invention is that：
1）Prevent nodularization from failing by strictly controlling the content of sulphur in carburant in the present invention, carburant is added using multiple batches of component
The mode entered prevents carburant is premature the erosion for accelerating furnace wall is added, while also ensuring the melting efficiency of carburant；Pass through
The lumpiness for controlling steel scrap, ensure that the melting efficiency of steel scrap；Steel alloy is added when iron liquid is increased to tapping temperature, reduces alloy
Loss；The method with instant inoculation is bred in nodulizer Rare-Earth Content 2%-3% and stokehold, increases the success of iron liquid nodularization
Rate.
Specific implementation mode
The following examples can make professional and technical personnel that the present invention be more fully understood, but therefore not send out this
It is bright to be limited among the embodiment described range.
A kind of technique of pure smelting scrap steel magnesium iron and gray iron casting, is as follows：
S1：The selection of raw material：It is >=95% to choose fixed carbon content, and sulfur content is less than 0.6%, and absorptivity is 80% or more, granularity
For the carburant of 1mm-5mm；Selection alloy content is low, and composition is accurate, and cleaning is become rusty less without greasy dirt, the carbon of lumpiness 50mm-100mm
Steel is as the furnace charge for producing magnesium iron and gray iron；Choose silicone content 70%-80% silicon content of iron and manganese 60%-70% ferromanganese.
S2：The melting of steel scrap：The steel scrap chosen is put into electric induction furnace, the electric current whirlpool generated by electric induction furnace
Whirlpool heats steel scrap and forms molten iron, and electric induction furnace makes molten iron composition be evenly distributed in electric induction furnace from stirring.
S3：The processing of molten iron composition：Before carbon steel is smelted into molten iron completely, the increasing chosen at least is added in two portions
Carbon agent；Ferrosilicon and ferromanganese is successively added in the 1min-2min after carbon steel is smelted into molten iron completely.
S4：The inoculation of iron liquid：When producing gray iron, the inovulant of 0.3%-1.2% is added into iron liquid；Produce magnesium iron
When, the nodulizer of 0.8%-1.2% and the content of rare earth 2%-3% of nodulizer are added into iron liquid, is bred using stokehold and instantaneous pregnant
Educate the method being combined.
Before steel scrap is completely melt, the 30%-45% for the carburant total amount chosen is added for the first time, waits for the carburetting of the first addition
When agent is dissolved in molten iron, the 50%-60% for the carburant total amount chosen is added for the second time；Steel scrap is completely melt that rear 1min-2min adds
Enter the 80%-90% for the ferrosilicon total amount chosen, the 85%-95% for the ferromanganese total amount chosen is added；Wait for the first addition ferrosilicon and
When ferromanganese is incorporated in molten iron, according to required composition with test as a result, the 5%- for the carburant total amount chosen is added for the third time
10%, the 10-20% for the ferrosilicon total amount chosen is added for the second time, the 5%-15% for the ferromanganese total amount chosen is added.
It is 0.3%-0.5% to produce the inovulant that HT200 is added；It is 0.4%-0.8% to produce the inovulant that HT250 is added, raw
It is 0.5%-1.2% to produce the inovulant that HT300 is added.
It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, above-described embodiment and explanation
Merely illustrating the principles of the invention described in book, without departing from the spirit and scope of the present invention, the present invention also has
Various changes and modifications, these changes and improvements all fall within the protetion scope of the claimed invention.The claimed scope of the invention
It is defined by the appending claims and its equivalent thereof.
Claims (3)
1. a kind of technique of pure smelting scrap steel magnesium iron and gray iron casting, it is characterised in that：It is as follows：
S1：The selection of raw material：It is >=95% to choose fixed carbon content, and sulfur content is less than 0.6%, and absorptivity is 80% or more, granularity
For the carburant of 1mm-5mm；Selection alloy content is low, and composition is accurate, and cleaning is become rusty less without greasy dirt, the carbon of lumpiness 50mm-100mm
Steel is as the furnace charge for producing magnesium iron and gray iron；Choose silicone content 70%-80% silicon content of iron and manganese 60%-70% ferromanganese；
S2：The melting of steel scrap：The steel scrap chosen is put into electric induction furnace, the electric current whirlpool generated by electric induction furnace adds
Hot steel scrap forms molten iron, and electric induction furnace makes molten iron composition be evenly distributed in electric induction furnace from stirring；
S3：The processing of molten iron composition：Before carbon steel is smelted into molten iron completely, the carburetting chosen at least is added in two portions
Agent；Ferrosilicon and ferromanganese is successively added in the 1min-2min after carbon steel is smelted into molten iron completely；
S4：The inoculation of iron liquid：When producing gray iron, the inovulant of 0.3%-1.2% is added into iron liquid；When producing magnesium iron, to
The nodulizer of 0.8%-1.2% and the content of rare earth 2%-3% of nodulizer are added in iron liquid, is bred using stokehold and is mutually tied with instant inoculation
The method of conjunction.
2. the technique of a kind of pure smelting scrap steel magnesium iron and gray iron casting according to claim 1, it is characterised in that：It is described useless
Before steel is completely melt, the 30%-45% for the carburant total amount chosen is added for the first time, waits for that the carburant of the first addition dissolves in molten iron
When middle, the 50%-60% for the carburant total amount chosen is added for the second time；Steel scrap is completely melt what rear 1min-2min additions had been chosen
The 80%-90% of ferrosilicon total amount, the 85%-95% that the ferromanganese total amount chosen is added；The ferrosilicon and ferromanganese for waiting for the first addition incorporate iron
When in water, according to required composition and test as a result, is added for the third time the 5%-10% for the carburant total amount chosen, for the second time add
Enter the 10-20% for the ferrosilicon total amount chosen, the 5%-15% for the ferromanganese total amount chosen is added.
3. the technique of a kind of pure smelting scrap steel magnesium iron and gray iron casting according to claim 1, it is characterised in that：The life
It is 0.3%-0.5% to produce the inovulant that HT200 is added；It is 0.4%-0.8% to produce the inovulant that HT250 is added, and production HT300 is added
Inovulant be 0.5%-1.2%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810351696.0A CN108531679A (en) | 2018-04-19 | 2018-04-19 | A kind of technique of pure smelting scrap steel magnesium iron and gray iron casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810351696.0A CN108531679A (en) | 2018-04-19 | 2018-04-19 | A kind of technique of pure smelting scrap steel magnesium iron and gray iron casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108531679A true CN108531679A (en) | 2018-09-14 |
Family
ID=63477843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810351696.0A Pending CN108531679A (en) | 2018-04-19 | 2018-04-19 | A kind of technique of pure smelting scrap steel magnesium iron and gray iron casting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108531679A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109487148A (en) * | 2018-11-26 | 2019-03-19 | 山东圣鑫管业有限公司 | A method of utilizing waste and old steel melting water heating pipe fittings molten iron |
| CN114990419A (en) * | 2022-06-22 | 2022-09-02 | 吉林省诚鼎精密铸造有限公司 | Method for smelting cast iron from scrap steel |
| CN115216678A (en) * | 2022-07-13 | 2022-10-21 | 宜兴市宁远模具科技有限公司 | High-precision sealing head die and preparation method thereof |
| CN115558841A (en) * | 2022-11-30 | 2023-01-03 | 南通冠峰铸造有限公司 | Processing technology of high-strength gray iron |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101545023A (en) * | 2009-04-29 | 2009-09-30 | 河北翼辰实业集团有限公司 | Smelting process for producing nodular iron castings by using scrap steel |
| CN107083515A (en) * | 2017-04-13 | 2017-08-22 | 四川省川建管道有限公司 | A kind of method of smelting of producing nodular iron castings |
| CN107365935A (en) * | 2017-08-03 | 2017-11-21 | 南京威尔特铸造材料科技有限公司 | 100% steel scrap produces high-quality magnesium iron method and refining purification agent and process for producing same |
-
2018
- 2018-04-19 CN CN201810351696.0A patent/CN108531679A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101545023A (en) * | 2009-04-29 | 2009-09-30 | 河北翼辰实业集团有限公司 | Smelting process for producing nodular iron castings by using scrap steel |
| CN107083515A (en) * | 2017-04-13 | 2017-08-22 | 四川省川建管道有限公司 | A kind of method of smelting of producing nodular iron castings |
| CN107365935A (en) * | 2017-08-03 | 2017-11-21 | 南京威尔特铸造材料科技有限公司 | 100% steel scrap produces high-quality magnesium iron method and refining purification agent and process for producing same |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109487148A (en) * | 2018-11-26 | 2019-03-19 | 山东圣鑫管业有限公司 | A method of utilizing waste and old steel melting water heating pipe fittings molten iron |
| CN114990419A (en) * | 2022-06-22 | 2022-09-02 | 吉林省诚鼎精密铸造有限公司 | Method for smelting cast iron from scrap steel |
| CN114990419B (en) * | 2022-06-22 | 2023-10-27 | 吉林省诚鼎精密铸造有限公司 | Method for smelting cast iron by using scrap steel |
| CN115216678A (en) * | 2022-07-13 | 2022-10-21 | 宜兴市宁远模具科技有限公司 | High-precision sealing head die and preparation method thereof |
| CN115558841A (en) * | 2022-11-30 | 2023-01-03 | 南通冠峰铸造有限公司 | Processing technology of high-strength gray iron |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104120332B (en) | High-intensity high-tenacity spheroidal graphite cast-iron 600-10 and production technology thereof | |
| CN108531679A (en) | A kind of technique of pure smelting scrap steel magnesium iron and gray iron casting | |
| CN100434558C (en) | High-boron cast steel containing granular boride and preparing method thereof | |
| EP1887090B1 (en) | Improved method of producing ductile iron | |
| CN102873473B (en) | Low-hydrogen alkaline electrode for online welding of X80 pipeline steel | |
| CN106929750B (en) | Compacted iron brake drum and preparation method thereof | |
| CN103060668B (en) | Carbide-containing ductile iron and its making method | |
| CN102400032B (en) | Large-cross-section nodular cast iron | |
| CN105401064A (en) | Medium silicon molybdenum nodular cast iron and production method thereof | |
| CN102851574A (en) | Heatproof alloy vermicular cast iron and method for preparing same | |
| CN112680650A (en) | High-strength nodular cast iron and preparation method thereof | |
| CN101525719B (en) | Nucleating agent used for producing thin-wall malleable iron component by metal mold | |
| CN102220543A (en) | High-strength wear-resisting nodular cast iron applied on water pump | |
| CN114381649B (en) | High-strength high-toughness nodular cast iron material and casting method thereof | |
| CN104862450A (en) | Method for enabling nano molten iron purifying modifier to be used in austenite ductile cast iron wear-resistant casting | |
| CN106811677A (en) | A kind of piston ring carrier cast iron materials and its manufacture method | |
| CN104532107A (en) | Vanadium-titanium vermicular cast iron brake drum and manufacture method thereof | |
| CN109609835B (en) | High-toughness wear-resistant nodular cast iron and preparation process and application thereof | |
| CN106435334A (en) | Smelting technique of as-cast ductile iron | |
| CN111424207A (en) | Antibacterial and corrosion-resistant cast iron material for pot and manufacturing process of antibacterial and corrosion-resistant cast iron pot | |
| CN102373365B (en) | Large-section nodular cast iron | |
| CN105463156B (en) | A kind of method of intermediate frequency furnace smelting ultralow-carbon stainless steel | |
| CN108385031A (en) | A kind of hot-rolled round steel for high carbon manganese and chrome grinding ball and its manufacturing method | |
| CN108425064A (en) | The vermicular cast iron formula and melting technique of novel high-performance Nb containing refractory metal | |
| CN107723582B (en) | High-aluminum high-temperature-resistant nodular cast iron containing molybdenum and chromium elements and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180914 |