CN107312915A - A kind of method of iron casting dephosphorization - Google Patents
A kind of method of iron casting dephosphorization Download PDFInfo
- Publication number
- CN107312915A CN107312915A CN201710759971.8A CN201710759971A CN107312915A CN 107312915 A CN107312915 A CN 107312915A CN 201710759971 A CN201710759971 A CN 201710759971A CN 107312915 A CN107312915 A CN 107312915A
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- Prior art keywords
- casting
- parts
- dephosphorization
- salt
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D3/00—Diffusion processes for extraction of non-metals; Furnaces therefor
- C21D3/02—Extraction of non-metals
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
- C21D1/607—Molten salts
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D5/00—Heat treatments of cast-iron
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The present invention discloses a kind of method of iron casting dephosphorization, including following operating procedure：（1）When casting after casting is cooled into 500 DEG C, salt bath processing is carried out, is further continued for being cooled to surface temperature for 90 100 DEG C；（2）Dephosphorising agent is uniformly sprinkled in casting upper surface, casting is then heated to temper of 600 650 DEG C of progress again；（3）Casting is overturn 180 ° again, Dephosphorising agent is uniformly sprinkled in its upper surface, casting then is heated into 600 650 DEG C again is carried out after double tempering processing, finished product.The method for the iron casting dephosphorization that the present invention is provided, it is simple to operate, dephosphorization treatment is carried out to casting while tempering step, the utilization rate of the energy is improved, production cost is reduced, and the removal effect of phosphorus is notable, greatly improves the quality of casting.
Description
Technical field
The invention belongs to the preparing technical field of iron casting, and in particular to a kind of method of iron casting dephosphorization.
Background technology
In the pig iron resource of China, most of pig iron contains a small amount of P elements, finds, will contain in actual production
The higher pig iron of phosphorus amount is cast as after iron pipe, the inferior quality of iron pipe, low intensity, it is prone to corrode, therefore, generally require by
Casting carries out dephosphorization treatment, to lift its quality.It is that raw material is taken off before casting shaping in current existing dephosphorizing technology
Phosphorus processing, because the size of raw material is big, dephosphorization effect is not very notable, and the temperature needed for dephosphorization is higher, causes the energy
Serious waste.
The content of the invention
In order to solve the above-mentioned technical problem, the present invention provides a kind of method of iron casting dephosphorization.
The present invention is achieved by the following technical solutions.
A kind of method of iron casting dephosphorization, including following operating procedure：
（1）When casting after casting is cooled into 500 DEG C, salt bath processing is carried out, is further continued for being cooled to surface temperature for 90-
100 DEG C, the salt used in above-mentioned salt bath is made up of the component of following parts by weight：47-55 parts of potassium chloride, 22-28 parts of magnesium chloride, two water
Close 11-16 parts of sodium molybdate；
（2）Dephosphorising agent is uniformly sprinkled in casting upper surface, casting then is heated into 600-650 DEG C again is carried out at once tempering
Reason；
（3）Casting is overturn 180 ° again, Dephosphorising agent is uniformly sprinkled in its upper surface, casting is then heated to 600-650 again
DEG C carry out double tempering processing after, finished product；
Above-mentioned Dephosphorising agent is made up of the component of following parts by weight：43-52 parts of marmor serpentinatum, 22-25 parts of niter, 14-18 parts of stalactite,
10-15 parts of fluorite.
Specifically, above-mentioned steps（1）The consumption of salt is during middle salt bath：Every square metre of casting area adds 150-200g's
Salt.
Specifically, in above-mentioned Dephosphorising agent, the average grain diameter of marmor serpentinatum is 60-70 mesh, and the average grain diameter of niter is 80-100
Mesh, the average grain diameter of stalactite is 90-100 mesh, and the average grain diameter of fluorite is 30-50 mesh.
Technical scheme more than, the beneficial effects of the invention are as follows：
The method for the iron casting dephosphorization that the present invention is provided, it is simple to operate, casting is carried out at dephosphorization while tempering step
Reason, improves the utilization rate of the energy, reduces production cost, and the removal effect of phosphorus is notable, greatly improves casting
Quality.Wherein, in salt bath of the present invention, two molybdic acid hydrate sodium are added, can effectively accelerate the cooling velocity of casting, and can prevent
Only casting is in dephosphorization, and metallic element therein chemically reacts with Dephosphorising agent；The Dephosphorising agent that the present invention is provided, will not be with casting
Carbon in part chemically reacts, but can effectively aoxidize the P elements in casting, with extremely excellent dephosphorization effect
Really, and the present invention Dephosphorising agent, it is not necessary to react, under temperature, that is, have with P elements under hot environment again
Preferable dephosphorization effect.
Embodiment
Below by way of specific embodiment, technical scheme is further described.It should be noted that institute
It is narrative, and non-limiting to state embodiment, and the content that the present invention is covered is not limited to following embodiments.
Embodiment 1
A kind of method of iron casting dephosphorization, including following operating procedure：
（1）When casting after casting is cooled into 500 DEG C, salt bath processing is carried out, it is 90 to be further continued for being cooled to surface temperature
DEG C, the salt used in above-mentioned salt bath is made up of the component of following parts by weight：47 parts of potassium chloride, 22 parts of magnesium chloride, two molybdic acid hydrate sodium
11 parts；
（2）Dephosphorising agent is uniformly sprinkled in casting upper surface, casting is then heated to temper of 600 DEG C of progress again；
（3）Casting is overturn 180 ° again, Dephosphorising agent is uniformly sprinkled in its upper surface, casting then is heated into 600 DEG C again enters
After the processing of row double tempering, finished product；
Above-mentioned Dephosphorising agent is made up of the component of following parts by weight：43 parts of marmor serpentinatum, 22 parts of niter, 14 parts of stalactite, 10 parts of fluorite.
Specifically, above-mentioned steps（1）The consumption of salt is during middle salt bath：Every square metre of casting area adds 150g salt.
Specifically, in above-mentioned Dephosphorising agent, the average grain diameter of marmor serpentinatum is 60 mesh, and the average grain diameter of niter is 80 mesh, clock breast
The average grain diameter of stone is 90 mesh, and the average grain diameter of fluorite is 30 mesh.
In the present embodiment, phosphorus content that can be by phosphorus content for 0.2% iron casting is down to 0.03%.
Embodiment 2
A kind of method of iron casting dephosphorization, including following operating procedure：
（1）When casting after casting is cooled into 500 DEG C, salt bath processing is carried out, it is 95 to be further continued for being cooled to surface temperature
DEG C, the salt used in above-mentioned salt bath is made up of the component of following parts by weight：52 parts of potassium chloride, 24 parts of magnesium chloride, two molybdic acid hydrate sodium
14 parts；
（2）Dephosphorising agent is uniformly sprinkled in casting upper surface, casting is then heated to temper of 630 DEG C of progress again；
（3）Casting is overturn 180 ° again, Dephosphorising agent is uniformly sprinkled in its upper surface, casting then is heated into 630 DEG C again enters
After the processing of row double tempering, finished product；
Above-mentioned Dephosphorising agent is made up of the component of following parts by weight：50 parts of marmor serpentinatum, 24 parts of niter, 16 parts of stalactite, 13 parts of fluorite.
Specifically, above-mentioned steps（1）The consumption of salt is during middle salt bath：Every square metre of casting area adds 170g salt.
Specifically, in above-mentioned Dephosphorising agent, the average grain diameter of marmor serpentinatum is 65 mesh, and the average grain diameter of niter is 90 mesh, clock breast
The average grain diameter of stone is 95 mesh, and the average grain diameter of fluorite is 40 mesh.
In the present embodiment, phosphorus content that can be by phosphorus content for 0.2% iron casting is down to 0.02%.
Embodiment 3
A kind of method of iron casting dephosphorization, including following operating procedure：
（1）When casting after casting is cooled into 500 DEG C, salt bath processing is carried out, it is 100 to be further continued for being cooled to surface temperature
DEG C, the salt used in above-mentioned salt bath is made up of the component of following parts by weight：55 parts of potassium chloride, 28 parts of magnesium chloride, two molybdic acid hydrate sodium
16 parts；
（2）Dephosphorising agent is uniformly sprinkled in casting upper surface, casting is then heated to temper of 650 DEG C of progress again；
（3）Casting is overturn 180 ° again, Dephosphorising agent is uniformly sprinkled in its upper surface, casting then is heated into 650 DEG C again enters
After the processing of row double tempering, finished product；
Above-mentioned Dephosphorising agent is made up of the component of following parts by weight：52 parts of marmor serpentinatum, 25 parts of niter, 18 parts of stalactite, 15 parts of fluorite.
Specifically, above-mentioned steps（1）The consumption of salt is during middle salt bath：Every square metre of casting area adds 200g salt.
Specifically, in above-mentioned Dephosphorising agent, the average grain diameter of marmor serpentinatum is 70 mesh, and the average grain diameter of niter is 100 mesh, clock breast
The average grain diameter of stone is 100 mesh, and the average grain diameter of fluorite is 50 mesh.
In the present embodiment, phosphorus content that can be by phosphorus content for 0.2% iron casting is down to 0.02%.
Claims (3)
1. a kind of method of iron casting dephosphorization, it is characterised in that including following operating procedure：
（1）When casting after casting is cooled into 500 DEG C, salt bath processing is carried out, is further continued for being cooled to surface temperature for 90-
100 DEG C, the salt used in above-mentioned salt bath is made up of the component of following parts by weight：47-55 parts of potassium chloride, 22-28 parts of magnesium chloride, two water
Close 11-16 parts of sodium molybdate；
（2）Dephosphorising agent is uniformly sprinkled in casting upper surface, casting then is heated into 600-650 DEG C again is carried out at once tempering
Reason；
（3）Casting is overturn 180 ° again, Dephosphorising agent is uniformly sprinkled in its upper surface, casting is then heated to 600-650 again
DEG C carry out double tempering processing after, finished product；
Above-mentioned Dephosphorising agent is made up of the component of following parts by weight：43-52 parts of marmor serpentinatum, 22-25 parts of niter, 14-18 parts of stalactite,
10-15 parts of fluorite.
2. a kind of method of iron casting dephosphorization according to claim 1, it is characterised in that above-mentioned steps（1）Middle salt
The consumption of salt is during bath：Every square metre of casting area adds 150-200g salt.
3. the method for a kind of iron casting dephosphorization according to claim 1, it is characterised in that in above-mentioned Dephosphorising agent, flower
The average grain diameter of stamen stone is 60-70 mesh, and the average grain diameter of niter is 80-100 mesh, and the average grain diameter of stalactite is 90-100 mesh,
The average grain diameter of fluorite is 30-50 mesh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710759971.8A CN107312915A (en) | 2017-08-30 | 2017-08-30 | A kind of method of iron casting dephosphorization |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710759971.8A CN107312915A (en) | 2017-08-30 | 2017-08-30 | A kind of method of iron casting dephosphorization |
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| CN107312915A true CN107312915A (en) | 2017-11-03 |
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| CN201710759971.8A Pending CN107312915A (en) | 2017-08-30 | 2017-08-30 | A kind of method of iron casting dephosphorization |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1369570A (en) * | 2001-02-14 | 2002-09-18 | 冯美才 | Process for preparing cast iron |
| CN1948514A (en) * | 2006-11-09 | 2007-04-18 | 安徽工业大学 | Method of simultaneously dephosphorus desulfur of chromium containing molten iron using barium carbonate slag material |
| CN101984079A (en) * | 2010-11-08 | 2011-03-09 | 武汉科技大学 | Dephosphorization and iron-increasing method of high phosphorus hematite by direct reduction |
| CN102094100A (en) * | 2011-03-18 | 2011-06-15 | 武汉钢铁(集团)公司 | Molten iron dephosphorizing agent and application method thereof |
| CN102230075A (en) * | 2011-06-20 | 2011-11-02 | 江苏大学 | Dephosphorizing process of molybdenum nickel ore |
| CN103014480A (en) * | 2012-12-10 | 2013-04-03 | 马鞍山市恒达耐磨材料有限责任公司 | Multielement microalloy low chromium white iron grinding ball and manufacturing method thereof |
| CN106319336A (en) * | 2016-08-23 | 2017-01-11 | 宁国市开源电力耐磨材料有限公司 | Low-carbon high-chromium abrasion-resistant ball and preparation technique thereof |
-
2017
- 2017-08-30 CN CN201710759971.8A patent/CN107312915A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1369570A (en) * | 2001-02-14 | 2002-09-18 | 冯美才 | Process for preparing cast iron |
| CN1948514A (en) * | 2006-11-09 | 2007-04-18 | 安徽工业大学 | Method of simultaneously dephosphorus desulfur of chromium containing molten iron using barium carbonate slag material |
| CN101984079A (en) * | 2010-11-08 | 2011-03-09 | 武汉科技大学 | Dephosphorization and iron-increasing method of high phosphorus hematite by direct reduction |
| CN102094100A (en) * | 2011-03-18 | 2011-06-15 | 武汉钢铁(集团)公司 | Molten iron dephosphorizing agent and application method thereof |
| CN102230075A (en) * | 2011-06-20 | 2011-11-02 | 江苏大学 | Dephosphorizing process of molybdenum nickel ore |
| CN103014480A (en) * | 2012-12-10 | 2013-04-03 | 马鞍山市恒达耐磨材料有限责任公司 | Multielement microalloy low chromium white iron grinding ball and manufacturing method thereof |
| CN106319336A (en) * | 2016-08-23 | 2017-01-11 | 宁国市开源电力耐磨材料有限公司 | Low-carbon high-chromium abrasion-resistant ball and preparation technique thereof |
Non-Patent Citations (2)
| Title |
|---|
| 董元篪 等编: "《钢铁生产过程的脱磷》", 30 April 2012 * |
| 赵莹 等: "《金属热处理工 岗位手册》", 31 August 2014 * |
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Application publication date: 20171103 |