CN105753456B - Crucible coating for smelting nonferrous alloy - Google Patents
Crucible coating for smelting nonferrous alloy Download PDFInfo
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- CN105753456B CN105753456B CN201610066612.XA CN201610066612A CN105753456B CN 105753456 B CN105753456 B CN 105753456B CN 201610066612 A CN201610066612 A CN 201610066612A CN 105753456 B CN105753456 B CN 105753456B
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3418—Silicon oxide, silicic acids, or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3427—Silicates other than clay, e.g. water glass
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- C—CHEMISTRY; METALLURGY
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/349—Clays, e.g. bentonites, smectites such as montmorillonite, vermiculites or kaolines, e.g. illite, talc or sepiolite
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
- C04B2235/447—Phosphates or phosphites, e.g. orthophosphate, hypophosphite
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- Engineering & Computer Science (AREA)
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- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
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- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
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Abstract
The invention discloses a crucible coating for smelting non-ferrous alloy, which comprises the following components in percentage by weight: 45-55 percent of refractory powder, 10-15 percent of suspending agent, 0.5-1.0 percent of binder, 0.5-1.0 percent of surfactant and the balance of carrier liquid. The crucible coating for smelting the nonferrous alloy is provided by deep research on the surface layer of the crucible in the smelting process, the crucible coating has good adhesion performance on the surface layer of the crucible, the coating does not bubble or crack in a high-temperature smelting environment, the resistance capability of the crucible to molten metal can be effectively improved, the purity of the nonferrous alloy molten metal is improved, and the service life of the crucible is prolonged.
Description
Technical Field
The invention relates to a coating, in particular to a crucible coating for metal smelting.
Background
The crucible, which is a vessel for melting nonferrous alloys, is likely to come into contact with slag, decomposed gas, and dust in a high-temperature use state, and a surface layer material is locally peeled off. The performance of the crucible surface is improved, and a series of problems of metal liquid pollution, smelting container corrosion and the like can be effectively solved. Solving the problems has practical significance for improving the purity of the non-ferrous alloy molten metal, prolonging the service life of the container, reducing the cost and improving the economic benefit.
At present, the physical and chemical properties and the application effect of a melting crucible are generally improved by adopting an integral material process, and the service life of the crucible is prolonged by improving the components, changing the shape, adjusting the porosity and the like.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a more reasonable surface coating, which can effectively improve the capability of the surface layer of the crucible for resisting the corrosion of molten metal, thereby improving the purity of the non-ferrous alloy molten metal and prolonging the service life of the crucible.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a crucible coating for smelting nonferrous alloy comprises the following components in percentage by weight: 45-55% of refractory powder, 10-15% of suspending agent, 0.5-1.0% of binder, 0.5-1.0% of surfactant and the balance of carrier liquid;
the refractory powder is high-purity white corundum powder and Al2O3The content is more than or equal to 99.5 percent;
the suspensionThe floating agent is sodium bentonite and magnesium aluminum silicate, the expansion multiple of the sodium bentonite is more than or equal to 20, and the colloid value is more than 80; MgAl of the magnesium aluminum silicate2(SiO3)4The content is more than or equal to 99%, and the pH value of the 5% aqueous dispersion is 7-9.5; the mixing ratio of the sodium bentonite to the magnesium aluminum silicate is as follows: 1: 1-3: 1;
the binder is silica sol, phosphate, and SiO of the silica sol229-31 percent of Na2The content of O is 0.3-0.5%, the density is 1.1-1.3 g/cm3, and the pH value is 8.5-10; the phosphate is aluminum dihydrogen phosphate, P2O5The content is 65 +/-2 percent, and the relative density is 1.44-1.47 g/cm3The mixing ratio of the silica sol to the phosphate is 1: 1-1: 3;
the surfactant is fatty alcohol-polyoxyethylene ether, the pH value of the fatty alcohol-polyoxyethylene ether in a 1% aqueous solution is 5-7, and the cloud point of the fatty alcohol-polyoxyethylene ether in a 1% aqueous solution is 40-50 ℃;
the carrier liquid is water.
The crucible coating for smelting the nonferrous alloy is provided by deep research on the surface layer of the crucible in the smelting process, the crucible coating has good adhesion performance on the surface layer of the crucible, the coating does not bubble or crack in a high-temperature smelting environment, the resistance capability of the crucible to molten metal can be effectively improved, the purity of the nonferrous alloy molten metal is improved, and the service life of the crucible is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
FIG. 1 is a schematic view of the preparation process of the crucible coating for melting nonferrous alloy of the present invention.
Detailed Description
A crucible coating for smelting nonferrous alloy comprises the following components in percentage by weight: 45-55% of refractory powder, 10-15% of suspending agent, 0.5-1.0% of binder, 0.5-1.0% of surfactant and the balance of carrier liquid;
the refractory powder is high-purityWhite corundum powder, Al2O3The content is more than or equal to 99.5 percent;
the suspending agent is sodium bentonite and magnesium aluminum silicate, the expansion multiple of the sodium bentonite is more than or equal to 20, and the colloid value is more than 80; MgAl of the magnesium aluminum silicate2(SiO3)4The content is more than or equal to 99%, and the pH value of the 5% aqueous dispersion is 7-9.5; the mixing ratio of the sodium bentonite to the magnesium aluminum silicate is as follows: 1: 1-3: 1;
the binder is silica sol, phosphate, and SiO of the silica sol229-31 percent of Na2The content of O is 0.3-0.5%, the density is 1.1-1.3 g/cm3, and the pH value is 8.5-10; the phosphate is aluminum dihydrogen phosphate, P2O5The content is 65 +/-2 percent, and the relative density is 1.44-1.47 g/cm3The mixing ratio of the silica sol to the phosphate is 1: 1-1: 3;
the surfactant is fatty alcohol-polyoxyethylene ether, the pH value of the fatty alcohol-polyoxyethylene ether in a 1% aqueous solution is 5-7, and the cloud point of the fatty alcohol-polyoxyethylene ether in a 1% aqueous solution is 40-50 ℃;
the carrier liquid is water.
The following is a table of the component ratios for each example:
the mixing ratio of the suspending agents in each example is as follows:
the binder blend is as follows:
the crucible coating for smelting the nonferrous alloy is prepared according to the process shown in figure 1, and a large number of tests and detections prove that the crucible coating has good adhesion to the surface layer of the crucible, the coating does not bubble or crack in a high-temperature smelting environment, the resistance of the crucible to molten metal can be effectively improved, the purity of the nonferrous alloy molten metal is improved, and the service life of the crucible is prolonged.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (1)
1. The crucible coating for smelting the non-ferrous alloy is characterized by comprising the following components in percentage by weight: 45-55% of refractory powder, 10-15% of suspending agent, 0.5-1.0% of binder, 0.5-1.0% of surfactant and the balance of carrier liquid;
the refractory powder is high-purity white corundum powder and Al2O3The content is more than or equal to 99.5 percent;
the suspending agent is sodium bentonite and magnesium aluminum silicate, the expansion multiple of the sodium bentonite is more than or equal to 20, and the colloid value is more than 80; MgAl of the magnesium aluminum silicate2(SiO3)4The content is more than or equal to 99%, and the pH value of the 5% aqueous dispersion is 7-9.5; the mixing ratio of the sodium bentonite to the magnesium aluminum silicate is as follows: 1: 1-3: 1;
the binder is silica sol, phosphate, and SiO of the silica sol229-31 percent of Na2The content of O is 0.3-0.5%, the density is 1.1-1.3 g/cm3, and the pH value is 8.5-10; the phosphate is aluminum dihydrogen phosphate, P2O5The content is 65 +/-2 percent, and the relative density is 1.44-1.47 g/cm3The mixing ratio of the silica sol to the phosphate is 1: 1-1: 3;
the surfactant is fatty alcohol-polyoxyethylene ether, the pH value of the fatty alcohol-polyoxyethylene ether in a 1% aqueous solution is 5-7, and the cloud point of the fatty alcohol-polyoxyethylene ether in a 1% aqueous solution is 40-50 ℃;
the carrier liquid is water.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610066612.XA CN105753456B (en) | 2016-01-29 | 2016-01-29 | Crucible coating for smelting nonferrous alloy |
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| CN201610066612.XA CN105753456B (en) | 2016-01-29 | 2016-01-29 | Crucible coating for smelting nonferrous alloy |
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| CN105753456A CN105753456A (en) | 2016-07-13 |
| CN105753456B true CN105753456B (en) | 2021-07-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108580797B (en) * | 2018-05-29 | 2020-03-10 | 济南圣泉集团股份有限公司 | Metal mold coating for centrifugal casting and preparation method thereof |
| CN110172627B (en) * | 2019-06-05 | 2021-02-26 | 东北大学 | Stainless steel crucible coating for smelting aluminum-lithium alloy and preparation and coating methods thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101497105A (en) * | 2009-03-12 | 2009-08-05 | 深圳市景鼎现代科技有限公司 | Cast form water borne coating and technique for preparing the same |
| JP2009227951A (en) * | 2008-03-24 | 2009-10-08 | Korona:Kk | Carbon ceramic coating material for heat and corrosion resistance using waste tire carbon |
| CN102407275A (en) * | 2011-04-25 | 2012-04-11 | 湖北工业大学 | Expendable pattern casting (EPC) molding shell paint for casting steel and preparation method thereof |
| CN104446325A (en) * | 2014-11-26 | 2015-03-25 | 清大赛思迪新材料科技（北京）有限公司 | High temperature, contamination and slagging resistant ceramic paint as well as preparation method and application of high temperature, contamination and slagging resistant ceramic paint |
| CN104942222A (en) * | 2015-07-03 | 2015-09-30 | 上海市机械制造工艺研究所有限公司 | Protective coating on surface of refractory material |
-
2016
- 2016-01-29 CN CN201610066612.XA patent/CN105753456B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009227951A (en) * | 2008-03-24 | 2009-10-08 | Korona:Kk | Carbon ceramic coating material for heat and corrosion resistance using waste tire carbon |
| CN101497105A (en) * | 2009-03-12 | 2009-08-05 | 深圳市景鼎现代科技有限公司 | Cast form water borne coating and technique for preparing the same |
| CN102407275A (en) * | 2011-04-25 | 2012-04-11 | 湖北工业大学 | Expendable pattern casting (EPC) molding shell paint for casting steel and preparation method thereof |
| CN104446325A (en) * | 2014-11-26 | 2015-03-25 | 清大赛思迪新材料科技（北京）有限公司 | High temperature, contamination and slagging resistant ceramic paint as well as preparation method and application of high temperature, contamination and slagging resistant ceramic paint |
| CN104942222A (en) * | 2015-07-03 | 2015-09-30 | 上海市机械制造工艺研究所有限公司 | Protective coating on surface of refractory material |
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Effective date of registration: 20181225 Address after: East Workshop No. 2655 Fujin Road, Baoshan District, Shanghai, 2010 Applicant after: Xin Technology (Shanghai) Material Technology Co., Ltd. Address before: No. 960 Zhongxing Road, Zhabei District, Shanghai 200070 Applicant before: Shanghai Institute of Machine Building Technology Co., Ltd. |
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