CN106146044A - A kind of resistance to molten steel corrodes molding heat-insulating shield and preparation method thereof - Google Patents
A kind of resistance to molten steel corrodes molding heat-insulating shield and preparation method thereof Download PDFInfo
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- CN106146044A CN106146044A CN201510136780.7A CN201510136780A CN106146044A CN 106146044 A CN106146044 A CN 106146044A CN 201510136780 A CN201510136780 A CN 201510136780A CN 106146044 A CN106146044 A CN 106146044A
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- insulating shield
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Abstract
The present invention relates to a kind of resistance to molten steel and corrode molding heat-insulating shield and preparation method thereof, it is to use corundum coating to be coated obtaining by steel face at heat-insulating shield that described resistance to molten steel corrodes molding heat-insulating shield, and it can use wet coating or dry method coating.The resistance to molten steel of the present invention corrodes molding heat-insulating shield, is the work surface at heat-insulating shield contact molten steel, by coated corundum matter coating, to improve the refractoriness of the work surface of heat-insulating shield contact molten steel；After coated corundum matter coating, not only avoid heat-insulating shield and directly contact molten steel and the phenomenon of the heat-insulating shield that occurs and steel ingot adhesion, and the surface that corundum coating fine powder is formed, do not infiltrate with molten steel, be more easy to improve the fineness of ingot head；Meanwhile, heat-insulating shield is completely cut off by corundum coating, is difficult to dry linting, falls slag, reduces the source of foreign impurity, the beneficially raising of steel ingot internal soundness in steel.
Description
Technical field
The present invention relates to the insulation material that a kind of cast uses, be specifically related to a kind of resistance to molten steel and corrode mould
Casting heat-insulating shield and preparation method thereof.
Background technology
Now molding heat-insulating shield is with quartz sand, mineral wool fiber, cardboard, clay, resin, flyash etc.
For raw material, weighing according to each proportioning raw materials respectively, then order and Adding Way further in accordance with regulation load
Agitator tank pulping, after stirring 15 minutes, puts into storage material groove by the slurry being stirred, to be formed.Molding
Use vacuum filtration molding, first the internal layer slurry being stirred in advance is quantitatively adding in mould, flatten
Rear suction strainer, fills up chess tool the most again by the slurry of outer layer, after water exhausts, and stopping suction strainer, turnover mould,
In type heat-insulating shield slab is held with supporting plate；Last procedure is to dry, by the slab of heat-insulating shield,
Feeding dry kiln is dried, and takes out after 12 hours, according to its physical and chemical index of standard test and overall dimensions,
Standard compliant warehouse-in, stand-by.This heat-insulating shield can meet major part steel grade insulation, reduce crop rate
Demand.But the subject matter existed is, after the steel ingot demoulding, heat-insulating shield and the easy adhesion of ingot head and slag inclusion,
Not only have impact on surface of steel ingot and internal soundness, can damage when rolling in steel ingot band cap portion especially and roll rod surface
With the quality affecting steel.
Therefore, develop a kind of resistance to molten steel corrode, the molding heat-insulating shield of non-stick steel necessary.
Founding iron mold heat-insulating shield operating temperature will be more than 800 DEG C；Existing heat-insulating shield is more than 800 DEG C
Time, because of the organic burning in component and low melting point fusing, be full of cracks will be produced, shrink substantially,
Deformation, even dry linting, fall slag；After this heat-insulating shield changed and steel contacts, will be with molten steel
Mixing, after waiting molten steel cooling, just sticks to surface of steel ingot at cap mouth, it is extremely difficult to come off；When mill milling this
When kind has heat-insulating shield and slag to mix the steel ingot that can adhere to, this attachment will scratch roll, hinders equipment
Evil is the biggest.Also defect can be caused at steel surface when rolling steel ingot simultaneous with the roll scratched；It addition,
The slag, the powder that fall down from heat-insulating shield enter in molten steel, as do not floated to ingot head, Jiu Huicheng in time
For foreign impurity in steel, the inherent quality of mill product is affected the biggest.
Summary of the invention
For above-mentioned deficiency present in prior art, the technical problem to be solved is to provide one
Plant the erosion of resistance to molten steel, the molding heat-insulating shield of non-stick steel, be the work surface at heat-insulating shield contact molten steel, logical
Cross coated corundum matter coating, to improve the refractoriness of the work surface of heat-insulating shield contact molten steel；Coated corundum matter
After coating, not only avoid heat-insulating shield and directly contact molten steel and the phenomenon of the heat-insulating shield that occurs and steel ingot adhesion,
And the surface that corundum coating fine powder is formed, do not infiltrate with molten steel, be more easy to improve the bright and clean of ingot head
Degree；Meanwhile, heat-insulating shield is completely cut off by corundum coating, is difficult to dry linting, falls slag, reduces external folder in steel
The source of foreign material, the beneficially raising of steel ingot internal soundness.
For achieving the above object, present invention employs following technical scheme:
A kind of resistance to molten steel corrodes molding heat-insulating shield, is to use corundum coating to be carried out by steel face at heat-insulating shield
Coating obtains.
Resistance to molten steel of the present invention corrodes molding heat-insulating shield can be by wet coating and dry method coating system
For obtaining.
The method that resistance to molten steel described in the preparation of described wet coating corrodes molding heat-insulating shield, it comprises following
Step:
(1) prepare heat-insulating shield, dry；
(2) after corundum coating is added water mixing well, being coated by steel face at heat-insulating shield；
(3) heat-insulating shield after coating is dried.
The described heat-insulating shield of preparing of step (1) can be prepared by common process, such as by quartz sand, high alumina
The raw materials such as ceramic fibre, old newsprint, ceramic hollow ball carry out pulping, are uniformly mixing to obtain slurry, will slurry
Material adds in mould, suction strainer after pressing, and suction strainer limit, limit trowel is put down, and stops suction strainer, turning mould
Tool, holds the slab of heat-insulating shield with supporting plate, sends into dry kiln and dries, takes out after drying about 12 hours,
According to its physical and chemical index of standard test and overall dimensions, standard compliant warehouse-in, stand-by.
Preferably,
The drying temperature of step (1) is 100-150 DEG C, and drying time is 12～24 hours.
Step (2) described coating is preferably coating 2-3 time repeatedly, and the coated weight of each corundum coating is (i.e.
Convert the consumption of the corundum coating for not adding water) it is 300g/m2。
The drying temperature of step (3) is 100-150 DEG C, drying time 4-6 hour.
Described wet coating use corundum coating be made up of by weight percentage following component: described just
Beautiful matter coating is made up of by weight percentage following component: 325 mesh schmigels 83.45%, phenol-formaldehyde resin powder
5%, hexamethylenamine 0.5%, 325 mesh carborundum 10%, CMC 0.5%, explosion-proof fiber 0.5%, aluminium powder 0.05%.
Wherein, explosion-proof fiber is preferably polypropylene explosion-proof fiber JSA-3-3, softening point: 85 ± 10 DEG C.By each group
Pulverize after dividing mix homogeneously.The mass volume ratio (g/ml) of described corundum coating and water preferably 1:
1。
The method that resistance to molten steel described in the coating preparation of described dry method corrodes molding heat-insulating shield, it comprises following
Step:
(1) prepare heat-insulating shield slurry, slurry is filled up mould, when water exhausts soon, corundum is coated with
Material is sprinkled upon in mould on the heat-insulating shield slurry by steel face uniformly；
(2) utilizing the moisture that pulp surface is remaining, suction strainer limit, limit trowel is put down, and after stopping suction strainer, turns over
Revolving die has, and sends into dry kiln and dries.
Preferably,
Step (1) described corundum coating was the fine powder corundum coating that 100 mesh sieves obtain.
The consumption of step (1) described corundum coating is about 300g/m2。
Step (2) described drying time is 12-24 hour, and drying temperature is 100～150 DEG C.
Described corundum coating is made up of by weight percentage following component: 325 mesh schmigels 83.45%,
Phenol-formaldehyde resin powder 5%, hexamethylenamine 0.5%, 325 mesh carborundum 10%, CMC 0.5%, explosion-proof fiber 0.5%,
Aluminium powder 0.05%.Wherein, explosion-proof fiber is preferably polypropylene explosion-proof fiber JSA-3-3, softening point: 85 ±
10℃。
Powder corundum coating is i.e. can get by pulverizing after each component mix homogeneously.
In the present invention, it is preferred to, heat-insulating shield slurry used by the coating of described dry method and wet coating is the most permissible
It is made up of following components in parts by weight: quartz sand 20-50 part, high alumina ceramic fiber 10-30 part, disregard message
Paper 10-30 part, ceramic hollow ball 20-40 part.Wherein, ceramic hollow ball i.e. high alumina hollow ball.
Accompanying drawing explanation
Fig. 1 is the heat-insulating shield photo not using corundum coating to coat；
Fig. 2 is the heat-insulating shield photo that embodiment 3 uses that corundum coating dry method coats；
Fig. 3 is the using effect photo of the heat-insulating shield not using corundum coating to coat；
Fig. 4 is the using effect photo of the heat-insulating shield that embodiment 3 uses corundum coating dry method to coat.
Detailed description of the invention
Below in conjunction with embodiment and Figure of description, the invention will be further described.Pottery in embodiment
The manufacturer of hollow ball is Yixing City Su Yu Refractory Co., ltd, the factory of high alumina ceramic fiber
Family is Zhejiang Bang Ni refractory fibre company limited, and explosion-proof fiber is polypropylene explosion-proof fiber JSA-3-3, soft
Change point: 85 ± 10 DEG C.
The preparation of embodiment 1 conventional insulation sheet
By 40 kilograms of quartz sands, 50 kilograms of high alumina ceramic fibers, 20 kilograms of old newsprint, 30 kilograms of potteries
Hollow ball adds agitator tank pulping, after stirring 15 minutes, the slurry being stirred is put into storage material groove, treats
Molding.
During molding, first the slurry being stirred in advance is quantitatively adding in mould, suction strainer after pressing.Limit
Suction strainer limit trowel is put down, and stops suction strainer, turnover mould, holds the slab of heat-insulating shield with supporting plate, sends into
Dry kiln is dried；Dry for 100 DEG C and take out, according to its physical and chemical index of standard test and profile chi after 12 hours
Very little, standard compliant warehouse-in, stand-by.
Embodiment 2 uses the preparation of the heat-insulating shield of corundum coating wet coating
Preparation corundum coating: the corundum coating that the coating of described dry method uses is by following component by weight hundred
Proportion by subtraction forms: 325 mesh schmigels 83.45%, phenol-formaldehyde resin powder 5%, hexamethylenamine 0.5%, 325 mesh
Carborundum 10%, CMC 0.5%, explosion-proof fiber 0.5%, aluminium powder 0.05%.By each component mix homogeneously,
Pulverize, to obtain final product.The corundum coating prepared is added the mass volume ratio of water, corundum coating and water
For 1g/ml, then with rotary broom be coated onto heat-insulating shield that embodiment 1 prepares by steel face, need anti-
Multiple 3 times, each coated weight (being converted to the powder corundum coating not added water) is 300g/m2,
Hold the heat-insulating shield after the coating of corundum coating with supporting plate, be fed again into dry kiln and dry；
Take out after drying four hours at 100 DEG C, according to its physical and chemical index of standard test and overall dimensions, meet
The warehouse-in of standard, stand-by.
Embodiment 3 uses the preparation of the heat-insulating shield that corundum coating dry method coats
Preparation corundum coating: the corundum coating that the coating of described dry method uses is by following component by weight hundred
Proportion by subtraction forms: 325 mesh schmigels 83.45%, phenol-formaldehyde resin powder 5%, hexamethylenamine 0.5%, 325 mesh
Carborundum 10%, CMC 0.5%, explosion-proof fiber 0.5%, aluminium powder 0.05%.By each component mix homogeneously,
Pulverize, to obtain final product.
By 40 kilograms of quartz sands, 50 kilograms of high alumina ceramic fibers, 20 kilograms of old newsprint, 30 kilograms of potteries
Hollow ball adds agitator tank pulping, after stirring 15 minutes, the slurry being stirred is filled up mould, treats water
When exhausting soon, in powder corundum coating being sprinkled upon mould equably with 100 mesh standard sieves, heat-insulating shield is subject to
On steel starch adhesive material, the consumption of corundum coating is 300g/m2；Utilize the moisture content that pulp surface is remaining, limit
Suction strainer limit trowel is put down, and stops suction strainer, turnover mould, holds the slab of heat-insulating shield with supporting plate, sends into
Dry kiln is dried；Take out after drying 12 hours at 100 DEG C, according to its physical and chemical index of standard test and profile
Size, standard compliant warehouse-in, stand-by.
Test case 1
The heat-insulating shield that embodiment 1-3 prepares is carried out performance test, and test result is shown in Table 1.
The heat-insulating shield performance test table that table 1 embodiment 1-3 prepares
From upper table data, use heat-insulating shield (embodiment 2 and the embodiment after the coating of corundum coating
3) refractoriness has had obvious rising, and shrinkage factor is decreased obviously, and surface is brighter and cleaner, and thermal conductivity declines, steel
Ingot segregation rate declines.Especially embodiment 3 employs dry method coating, and effect becomes apparent from.
The conventional die castings heat-insulating shield of embodiment 1, because using fibre weight in raw material big, heat-insulating shield top layer is not
It is likely to be breached the planarization effects of densification.Corundum coating is used to be overlying on the work surface of heat-insulating shield and steel contacts,
The space on heat-insulating shield surface can be filled up, increase the smoothness on heat-insulating shield surface, meanwhile, stop molten steel with exhausted
The direct area of hot plate；Meanwhile, corundum coating does not infiltrates with molten steel, and corundum coating is high temperature resistant, when
After the steel ingot demoulding, the heat-insulating shield of included corundum coating be easy to cap mouth at steel ingot peel off, this sample is just
Cap mouth surface of steel ingot effect bright and clean, carrot-free (see Fig. 1-4) can be reached.
It addition, the dry method coating method of embodiment 3, it is simple to one-shot forming, simple to operate.In treating mould
When slurry water exhausts soon, with 100 mesh standard sieves, powder corundum coating quantitative and even is sprinkled upon mould
On interior slurry.The water yield that pulp surface is remaining, suction strainer limit, limit trowel is utilized to put down.Bond strength is high,
Secondary baking during operation is smeared without wet method.
These are only presently preferred embodiments of the present invention, be not intended to limit protection scope of the present invention,
Therefore, all any modification, equivalent substitution and improvement etc. made within the spirit and principles in the present invention,
Should be included within the scope of the present invention.
Claims (10)
1. a resistance to molten steel corrodes molding heat-insulating shield, it is characterised in that described resistance to molten steel corrodes molding and uses
Heat-insulating shield is to use corundum coating to be coated obtaining by steel face at heat-insulating shield.
Resistance to molten steel the most as claimed in claim 1 corrodes molding heat-insulating shield, it is characterised in that: described painting
Cover and coat selected from wet coating and dry method.
3. wet coating prepares the method that resistance to molten steel described in claim 1 or 2 corrodes molding heat-insulating shield,
It is characterized in that comprising the steps of
(1) prepare heat-insulating shield, dry；
(2) after corundum coating is added water mixing well, being coated by steel face at heat-insulating shield；
(3) heat-insulating shield after coating is dried.
4. preparation method as claimed in claim 3, it is characterised in that: the drying temperature of step (1)
For 100-150 DEG C, drying time is 12-24 hour.
5. preparation method as claimed in claim 3, it is characterised in that: step (2) described coating is excellent
Electing coating 2-3 time repeatedly as, the coated weight of each corundum coating is 300g/m2。
6. preparation method as claimed in claim 3, it is characterised in that: the drying temperature of step (3)
For 100-150 DEG C, drying time is 4 hours.
7. the method that the dry method coating preparation resistance to molten steel described in claim 1 or 2 corrodes molding heat-insulating shield,
It is characterized in that comprising the steps of
(1) prepare heat-insulating shield slurry, slurry is filled up mould, when water exhausts soon, corundum is coated with
Material is sprinkled upon in mould on the heat-insulating shield slurry by steel face uniformly；
(2) utilizing the moisture that pulp surface is remaining, suction strainer limit, limit trowel is put down, and after stopping suction strainer, turns over
Revolving die has, and sends into dry kiln and dries.
8. preparation method as claimed in claim 7, it is characterised in that: step (1) described corundum
Coating was the fine powder corundum coating that 100 mesh sieves obtain.
9. the preparation method as described in claim 3-7, it is characterised in that: described corundum coating by under
State component to form by weight percentage: 325 mesh schmigels 83.45%, phenol-formaldehyde resin powder 5%, Wu Luotuo
Product 0.5%, 325 mesh carborundum 10%, CMC 0.5%, explosion-proof fiber 0.5%, aluminium powder 0.05%.
10. preparation method as claimed in claim 7, it is characterised in that: during the described drying of step (2)
Between be 12-24 hour, dry temperature be 100-150 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510136780.7A CN106146044B (en) | 2015-03-26 | 2015-03-26 | A kind of resistance to molten steel corrodes molding heat-insulating shield and preparation method thereof |
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| CN201510136780.7A CN106146044B (en) | 2015-03-26 | 2015-03-26 | A kind of resistance to molten steel corrodes molding heat-insulating shield and preparation method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86105161A (en) * | 1986-08-10 | 1987-02-11 | 辽宁省鞍山市陶瓷七厂 | A kind of composite heat-insulating shield |
| CN101195154A (en) * | 2007-12-19 | 2008-06-11 | 攀钢集团成都钢铁有限责任公司 | Casting mold for hollow steel ingot and producing method thereof |
| CN102850062A (en) * | 2011-06-29 | 2013-01-02 | 宝山钢铁股份有限公司 | Corundum coating material |
-
2015
- 2015-03-26 CN CN201510136780.7A patent/CN106146044B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86105161A (en) * | 1986-08-10 | 1987-02-11 | 辽宁省鞍山市陶瓷七厂 | A kind of composite heat-insulating shield |
| CN101195154A (en) * | 2007-12-19 | 2008-06-11 | 攀钢集团成都钢铁有限责任公司 | Casting mold for hollow steel ingot and producing method thereof |
| CN102850062A (en) * | 2011-06-29 | 2013-01-02 | 宝山钢铁股份有限公司 | Corundum coating material |
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| CN106146044B (en) | 2019-03-05 |
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