CN110015863B - Modifier for water glass for casting sand mold of electric melting brick and modified water glass prepared by modifier - Google Patents
Modifier for water glass for casting sand mold of electric melting brick and modified water glass prepared by modifier Download PDFInfo
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- CN110015863B CN110015863B CN201910306926.6A CN201910306926A CN110015863B CN 110015863 B CN110015863 B CN 110015863B CN 201910306926 A CN201910306926 A CN 201910306926A CN 110015863 B CN110015863 B CN 110015863B
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- Prior art keywords
- modifier
- water glass
- sodium hydroxide
- water
- minutes
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- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 title claims abstract description 73
- 239000003607 modifier Substances 0.000 title claims abstract description 48
- 235000019353 potassium silicate Nutrition 0.000 title claims abstract description 39
- 239000004576 sand Substances 0.000 title claims abstract description 30
- 239000011449 brick Substances 0.000 title claims abstract description 19
- 238000005266 casting Methods 0.000 title claims abstract description 18
- 238000002844 melting Methods 0.000 title description 10
- 230000008018 melting Effects 0.000 title description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 111
- 239000000463 material Substances 0.000 claims abstract description 65
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 16
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims abstract description 15
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims abstract description 15
- XYRAEZLPSATLHH-UHFFFAOYSA-N trisodium methoxy(trioxido)silane Chemical compound [Na+].[Na+].[Na+].CO[Si]([O-])([O-])[O-] XYRAEZLPSATLHH-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000003723 Smelting Methods 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims description 20
- 238000002360 preparation method Methods 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 125000000129 anionic group Chemical group 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 238000010521 absorption reaction Methods 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 150000002895 organic esters Chemical class 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/24—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00637—Uses not provided for elsewhere in C04B2111/00 as glue or binder for uniting building or structural materials
Abstract
The invention discloses a modifier for water glass for sand mold casting of an electric smelting brick and modified water glass prepared by the modifier, wherein the modifier comprises a material A, a material B and a material C; wherein, material A includes: 80-120 kg of softened water, 15-25 kg of sodium hydroxide and 10-20 kg of sodium methylsilicate, wherein the material B comprises: 80-120 kg of softened water, 15-25 kg of sodium hydroxide and 40-60 g of sodium polyacrylate, wherein the material C comprises: 80-120 kg of softened water, 15-25 kg of sodium hydroxide and 40-60 g of polyacrylamide. The modified water glass prepared by the modifier has excellent moisture absorption resistance, and the sand mold production is not influenced by the environmental humidity. Meanwhile, the prepared modified water glass material is low in price, the price is similar to that of common water glass and is more than half of that of modified water glass in the market, the production cost of enterprises can be greatly reduced, and the waterproof performance is higher than that of modified water glass in the market.
Description
Technical Field
The invention relates to a water glass modifier, in particular to a modifier for water glass for an electric smelting brick casting sand mold and modified water glass prepared by the modifier.
Background
The primary condition of the current production of the electric melting brick is to meet the requirement of environmental protection, the adhesive used for manufacturing the sand mould must be converted into an inorganic environment-friendly adhesive, the most potential organic ester curing agent and modified water glass self-hardening sand mould are generally popularized, the advantages of the sand mould are environmental protection and no pollution, and the produced sand mould has good regularity and high efficiency. However, the organic ester curing agent and the modified water glass self-hardening sand mold have moisture absorption performance, are not affected in the dry season in winter, and have reduced strength after moisture absorption in summer and autumn, so that the sand mold is deformed and collapsed, the smooth production is severely restricted, and meanwhile, direct economic loss is caused. Therefore, the requirement of sand mold manufacturing can be completely met only by researching and developing modified water glass with moisture absorption resistance.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide the modifier for the water glass for the casting sand mold of the electric melting brick and the modified water glass prepared by the modifier.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a modifier for water glass for casting sand molds by using electric smelting bricks comprises a material A, a material B and a material C; wherein the content of the first and second substances,
the material A comprises: 80-120 kg of softened water, 15-25 kg of sodium hydroxide, 10-20 kg of sodium methylsilicate,
the material B comprises: 80-120 kg of softened water, 15-25 kg of sodium hydroxide, 40-60 g of sodium polyacrylate,
the material C comprises: 80-120 kg of softened water, 15-25 kg of sodium hydroxide and 40-60 g of polyacrylamide.
The modifier for the water glass for the casting sand mold of the electric melting brick comprises a material A, a material B and a material C; wherein the content of the first and second substances,
the material A comprises: 100 kg of softened water, 20 kg of sodium hydroxide and 15 kg of sodium methylsilicate,
the material B comprises: 100 kg of softened water, 20 kg of sodium hydroxide and 50 g of sodium polyacrylate,
the material C comprises: 100 kg of softened water, 20 kg of sodium hydroxide and 50 g of polyacrylamide.
The solid content of sodium methyl silicate is 40%.
The sodium polyacrylate is food grade and has molecular weight of 1500 ten thousand.
The polyacrylamide is anionic, and the molecular weight is 800 ten thousand.
A preparation method of a modifier for water glass for sand mold casting of an electric smelting brick comprises the following steps:
(1) preparation of Material A:
adding sodium methyl silicate into softened water, stirring for 1-2 minutes at a speed of 50-80 revolutions per minute, then adding sodium hydroxide, continuing stirring for 5-10 minutes, and standing for 24 hours after cooling to normal temperature as the sodium hydroxide releases heat when meeting water;
(2) preparation of material B:
adding sodium hydroxide into softened water, stirring for 5-8 minutes at 120 revolutions per minute, cooling to normal temperature, adding sodium polyacrylate, stirring for 10-15 minutes at 120 revolutions per minute, and standing for 24 hours;
(3) preparation of Material C:
adding sodium hydroxide into softened water, stirring for 5-8 minutes at 120 revolutions per minute, cooling to normal temperature, adding polyacrylamide, stirring for 10-15 minutes at 120 revolutions per minute, and standing for 24 hours;
(4) mixing materials:
after 24 hours, the material A, B, C was mixed and stirred at 120 rpm for 10-15 minutes to obtain the modifier.
A method for using a modifier for water glass for casting sand molds by using an electric melting brick is to add 100-120 kg of the modifier into 880-900 kg of common water glass.
The modified water glass prepared by using the modifier for the water glass for the electric melting brick casting sand mold comprises 120 kilograms of 100-grade modifier and 900 kilograms of 880-grade common water glass.
The modified water glass comprises 100 kg of modifier and 900 kg of common water glass.
A method for preparing modified water glass comprises the steps of adding the prepared modifier into common water glass within 2 hours, stirring for 10-15 minutes, and standing for 24 hours to obtain the waterproof water glass.
The invention has the beneficial effects that:
1. the modified water glass prepared by the invention has excellent moisture absorption resistance, and the sand mold production is not influenced by the environmental humidity.
2. The modified water glass material prepared by the invention has low price, the price is similar to that of common water glass and is more than half of that of modified water glass in the market, the production cost of enterprises can be greatly reduced, and the waterproof performance is higher than that of the modified water glass in the market.
3. After the modifier is prepared, the modifier is added into water glass within 2 hours and stirred for use, otherwise, polyacrylamide in the modifier can generate a sedimentation effect with other raw materials, and the performance of the obtained modified water glass is greatly reduced.
Detailed Description
The following examples further illustrate the embodiments of the present invention in detail.
The raw materials used in the invention are as follows:
the solid content of sodium methyl silicate is 40%.
The sodium polyacrylate is food grade and has molecular weight of 1500 ten thousand.
The polyacrylamide is anionic, and the molecular weight is 800 ten thousand.
Example 1
A waterproof modifier for water glass for sand mold casting of electric melting brick comprises a material A, a material B and a material C; wherein the content of the first and second substances,
the material A comprises: 100 kg of softened water, 20 kg of sodium hydroxide and 15 kg of sodium methylsilicate,
the material B comprises: 100 kg of softened water, 20 kg of sodium hydroxide and 50 g of sodium polyacrylate,
the material C comprises: 100 kg of softened water, 20 kg of sodium hydroxide and 50 g of polyacrylamide.
The preparation method comprises the following steps:
(1) preparation of Material A:
adding sodium methyl silicate into softened water, stirring for 1 minute at a speed of 60 revolutions per minute, then adding sodium hydroxide, continuing stirring for 5 minutes, and standing for 24 hours after cooling to normal temperature due to the fact that the sodium hydroxide releases heat when meeting water;
(2) preparation of material B:
adding sodium hydroxide into softened water, stirring for 5 minutes at 120 revolutions per minute, cooling to normal temperature, adding sodium polyacrylate, stirring for 10 minutes at more than 120 revolutions per minute, and standing for 24 hours;
(3) preparation of Material C:
adding sodium hydroxide into softened water, stirring for 5 minutes at 120 revolutions per minute, cooling to normal temperature, adding polyacrylamide, stirring for 10 minutes at more than 120 revolutions per minute, and standing for 24 hours;
(4) mixing materials:
after 24 hours, the material A, B, C was mixed and stirred at 120 rpm for 10 minutes to obtain the modifier.
Example 2
A waterproof modifier for water glass for sand mold casting of electric melting brick comprises a material A, a material B and a material C; wherein the content of the first and second substances,
the material A comprises: 80 kg of softened water, 15 kg of sodium hydroxide and 10 kg of sodium methylsilicate,
the material B comprises: 80 kg of softened water, 15 kg of sodium hydroxide and 40 g of sodium polyacrylate,
the material C comprises: 80 kg of softened water, 15 kg of sodium hydroxide and 40 g of polyacrylamide.
The preparation method is the same as that of example 1.
Example 3
A waterproof modifier for water glass for sand mold casting of electric melting brick comprises a material A, a material B and a material C; wherein the content of the first and second substances,
the material A comprises: 120 kg of softened water, 25 kg of sodium hydroxide and 20 kg of sodium methylsilicate,
the material B comprises: 120 kg of softened water, 25 kg of sodium hydroxide and 60 g of sodium polyacrylate,
the material C comprises: 120 kg of softened water, 25 kg of sodium hydroxide and 60 g of polyacrylamide.
The preparation method is the same as that of example 1.
Example 4
The water glass containing the waterproof modifier comprises 100 kg of the waterproof modifier and 900 kg of common water glass.
The preparation method comprises the following steps: adding the prepared modifier into common water glass within 2 hours, stirring for 10-15 minutes, and standing for 24 hours to obtain the waterproof water glass.
1. Cost comparison of the inventive modifier (example 1) and modified water glass with commercially available modified water glass:
3000 yuan per ton of sodium hydroxide, 6000 yuan per ton of sodium methylsilicate, 9000 yuan per ton of polyacrylamide and 40 yuan per kg of sodium polyacrylate
One ton of modified water glass cost: 900 kg of water glass (900 yuan) + 100 kg of modifier (less than 100 yuan) ═ about 973 yuan per ton of water glass, namely: the price of the waterproof modified water glass prepared by the invention is basically equal to that of common water glass.
The price of the modified water glass sold in the market is more than 2200 yuan per ton, and the price of the modified water glass is lower than the market price by more than half.
2. The practical application of the modified water glass of the invention is compared with the commercial modified water glass
In 7 months in 2018, modified water glass (2400 yuan per ton, Ningdao Di Ke railway equipment Co., Ltd.) sold in the market is introduced to manufacture a sand mold, and meanwhile, the modified water glass prepared by the method does not have moisture absorption resistance due to high environmental humidity in summer, so that large-area collapse occurs within 24 hours when the sand mold is manufactured, and great loss is caused to production. The modified water glass prepared by the method has no sand mold deformation or collapse phenomenon for more than 8 months so far, and has good use condition.
Claims (10)
1. A modifier for water glass for casting sand molds by using electric smelting bricks is characterized by comprising a material A, a material B and a material C; wherein the content of the first and second substances,
the material A comprises: 80-120 kg of softened water, 15-25 kg of sodium hydroxide, 10-20 kg of sodium methylsilicate,
the material B comprises: 80-120 kg of softened water, 15-25 kg of sodium hydroxide, 40-60 g of sodium polyacrylate,
the material C comprises: 80-120 kg of softened water, 15-25 kg of sodium hydroxide and 40-60 g of polyacrylamide.
2. The modifier for water glass for electric smelting brick casting sand molds according to claim 1, which comprises a material A, a material B and a material C; wherein the content of the first and second substances,
the material A comprises: 100 kg of softened water, 20 kg of sodium hydroxide and 15 kg of sodium methylsilicate,
the material B comprises: 100 kg of softened water, 20 kg of sodium hydroxide and 50 g of sodium polyacrylate,
the material C comprises: 100 kg of softened water, 20 kg of sodium hydroxide and 50 g of polyacrylamide.
3. The modifier for water glass for fused brick casting sand molds according to claim 1, wherein the solid content of sodium methyl silicate is 40%.
4. The modifier for water glass for electric smelting brick casting sand molds according to claim 1, wherein the sodium polyacrylate is food grade and has a molecular weight of 1500 ten thousand.
5. The modifier for water glass for fused brick casting sand molds according to claim 1, wherein the polyacrylamide is anionic and has a molecular weight of 800 ten thousand.
6. A process for the preparation of a modifier according to any one of claims 1 to 5, comprising the steps of:
(1) preparation of Material A:
adding sodium methyl silicate into softened water, stirring for 1-2 minutes at a speed of 50-80 revolutions per minute, then adding sodium hydroxide, continuing stirring for 5-10 minutes, and standing for 24 hours after cooling to normal temperature as the sodium hydroxide releases heat when meeting water;
(2) preparation of material B:
adding sodium hydroxide into softened water, stirring for 5-8 minutes at 120 revolutions per minute, cooling to normal temperature, adding sodium polyacrylate, stirring for 10-15 minutes at 120 revolutions per minute, and standing for 24 hours;
(3) preparation of Material C:
adding sodium hydroxide into softened water, stirring for 5-8 minutes at 120 revolutions per minute, cooling to normal temperature, adding polyacrylamide, stirring for 10-15 minutes at 120 revolutions per minute, and standing for 24 hours;
(4) mixing materials:
after 24 hours, the material A, B, C was mixed and stirred at 120 rpm for 10-15 minutes to obtain the modifier.
7. The method for using the modifier according to any one of claims 1-5, wherein 120 kg of 100-one modifier is added to 900 kg of 880-one ordinary water glass.
8. Modified water glass prepared by using the modifier in any one of claims 1-5, which is characterized by comprising 120 kg of the modifier of 100 and 900 kg of common water glass of 880 and 880.
9. The modified water glass according to claim 8, comprising 100 kg of modifier and 900 kg of ordinary water glass.
10. A method for preparing modified water glass as claimed in claim 8, wherein the modifier is added to ordinary water glass within 2 hours, stirred for 10-15 minutes and left to stand for 24 hours to obtain the water-proof water glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910306926.6A CN110015863B (en) | 2019-04-17 | 2019-04-17 | Modifier for water glass for casting sand mold of electric melting brick and modified water glass prepared by modifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910306926.6A CN110015863B (en) | 2019-04-17 | 2019-04-17 | Modifier for water glass for casting sand mold of electric melting brick and modified water glass prepared by modifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110015863A CN110015863A (en) | 2019-07-16 |
| CN110015863B true CN110015863B (en) | 2021-08-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201910306926.6A Active CN110015863B (en) | 2019-04-17 | 2019-04-17 | Modifier for water glass for casting sand mold of electric melting brick and modified water glass prepared by modifier |
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| Country | Link |
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| CN (1) | CN110015863B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113333675B (en) * | 2021-05-28 | 2022-07-15 | 盐城大丰赛维铸造科技有限公司 | Manufacturing process of inorganic vacuum shell mold for casting |
| CN114436558A (en) * | 2022-01-17 | 2022-05-06 | 都江堰瑞泰科技有限公司 | Water glass modifier, modified water glass sand mold, preparation process and application thereof |
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| CN110015863A (en) | 2019-07-16 |
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