CN113953450A - Shell surface layer making process using aluminum-silicon refractory material powder and sand - Google Patents
Shell surface layer making process using aluminum-silicon refractory material powder and sand Download PDFInfo
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- CN113953450A CN113953450A CN202111204956.XA CN202111204956A CN113953450A CN 113953450 A CN113953450 A CN 113953450A CN 202111204956 A CN202111204956 A CN 202111204956A CN 113953450 A CN113953450 A CN 113953450A
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- China
- Prior art keywords
- sand
- powder
- surface layer
- facing
- silica
- 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
- 239000004576 sand Substances 0.000 title claims abstract description 56
- 239000000843 powder Substances 0.000 title claims abstract description 48
- 239000002344 surface layer Substances 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000008569 process Effects 0.000 title claims abstract description 24
- 239000011819 refractory material Substances 0.000 title claims abstract description 19
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 238000000576 coating method Methods 0.000 claims abstract description 34
- 239000011248 coating agent Substances 0.000 claims abstract description 26
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052863 mullite Inorganic materials 0.000 claims abstract description 15
- 229910001570 bauxite Inorganic materials 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 67
- 239000000853 adhesive Substances 0.000 claims description 15
- 230000001070 adhesive effect Effects 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 14
- 239000000080 wetting agent Substances 0.000 claims description 12
- 239000000377 silicon dioxide Substances 0.000 claims description 11
- 239000011230 binding agent Substances 0.000 claims description 9
- 239000010410 layer Substances 0.000 claims description 9
- 239000002518 antifoaming agent Substances 0.000 claims description 8
- 238000005507 spraying Methods 0.000 claims description 8
- 239000003973 paint Substances 0.000 claims description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 238000009825 accumulation Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 235000019353 potassium silicate Nutrition 0.000 claims description 3
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 2
- 238000007664 blowing Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims 2
- 230000001680 brushing effect Effects 0.000 claims 1
- 238000005253 cladding Methods 0.000 claims 1
- 238000005266 casting Methods 0.000 abstract description 12
- 229910052845 zircon Inorganic materials 0.000 abstract description 12
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 229910052593 corundum Inorganic materials 0.000 abstract description 4
- 239000010431 corundum Substances 0.000 abstract description 4
- 239000011257 shell material Substances 0.000 description 8
- 230000006872 improvement Effects 0.000 description 6
- 239000012535 impurity Substances 0.000 description 4
- 238000005495 investment casting Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- KMWBBMXGHHLDKL-UHFFFAOYSA-N [AlH3].[Si] Chemical class [AlH3].[Si] KMWBBMXGHHLDKL-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000003837 high-temperature calcination Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005058 metal casting Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910001868 water Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
Abstract
The invention discloses a shell surface layer making process using aluminum-silicon refractory material powder and sand. The bauxite clinker or mullite is used for replacing products of zircon powder and sand, so that domestic resources are rich, and the production cost can be obviously reduced; the raw materials do not contain organic matters and moisture, and the quality of the surface layer coating is not influenced. Compared with the traditional production process of zircon sand and white corundum, the production process of zircon sand and white corundum is simpler and more energy-saving, has better performance, is suitable for the production of castings made of various materials, and improves the quality of the castings.
Description
Technical Field
The invention relates to the field of precision investment casting, in particular to a shell surface layer making process using aluminum-silicon refractory material powder and sand.
Background
Zircon sand powder is most widely and successfully applied in the precision casting industry, but zircon sand belongs to a natural mineral product which is not subjected to deep processing. The impurities such as organic matters, moisture, various metals and oxides thereof have great influence on the quality of surface coatings and castings, and the refractoriness of the surface coatings and the castings is reduced. The existence of organic matters can cause the problems of coating surface layer cracking and the like. In addition, the zirconium ore resources in China are poor, and the zirconium ore resources depend on imported zircon sand ore in Australia and south Africa for a long time, which is also the reason for overhigh price of the zircon sand powder in China.
Therefore, there is a need in the field of precision casting to develop a shell facing process that does not use zircon sand powder.
Disclosure of Invention
The present invention has been made to overcome the above problems, and an object of the present invention is to provide a shell-making surface layer process using an alumina silica-based refractory powder and sand. In order to achieve the purpose, the invention adopts the following technical scheme:
a shell surface layer making process using aluminum-silicon refractory material powder and sand comprises the following steps:
s1, preparing raw materials
Preparing surface layer powder of the aluminum-silicon refractory material, surface layer sand of the aluminum-silicon refractory material, a binder, a wetting agent and a defoaming agent;
s2, preparing surface layer coating
Firstly adding an adhesive into a stirring barrel, then adding a wetting agent, uniformly mixing, adding high-aluminum surface layer powder in the stirring process, paying attention to prevent the powder from caking, finally adding a defoaming agent, stirring, and controlling the viscosity value of the material to be between 20 and 30 ℃;
s3. upper layer paint
The module is rotated or moved up and down in the coating bucket, so that bubbles are prevented from being accumulated in the concave corners, the grooves and the small holes of the module, and the bubbles and redundant coatings in the concave corners, the grooves and the small holes are removed, so that the coatings of all parts of the module are uniform, and missing coating, local accumulation and bubble wrapping are avoided;
s4, scattering surface sand
After finishing coating and hanging of the surface layer coating, immediately spraying a layer of uniform high-aluminum surface layer sand, uniformly covering each part of the module with the sand, and after finishing the sand spraying, putting the module into a surface layer house for drying and waiting for a subsequent process.
As an improvement, the surface layer powder of the aluminum-silicon series refractory material comprises one of bauxite clinker surface layer powder or mullite surface layer powder.
As an improvement, the bauxite chamotte surface sand or mullite surface sand is used as the surface sand of the bauxite refractory material.
As an improvement, the granularity of the surface layer powder of the aluminum-silicon refractory material is 325 meshes, and the granularity of the surface layer sand of the aluminum-silicon refractory material is 60-120 meshes.
As an improvement, the adhesive is one or more of silica sol, water glass and ethyl silicate.
As an improvement, the method for removing the excessive paint in the step S3 is to lightly blow or brush the local surface by using compressed air of 0.3-0.35 MPa.
In the improvement, the ratio (i.e. powder-to-liquid ratio) of the surface layer powder to the binder of the aluminum-silicon-based refractory material in the step S2 is 2.5: 1-3: 1; the weight of the wetting agent is 0.2-0.5% of the weight of the adhesive, and the weight of the wetting agent is 0.1-0.2% of the weight of the adhesive.
As a modification, the stirring time in the step S2 is more than 12 hours.
The invention has the advantages that:
the bauxite chamotte and the mullite are used for replacing products of zircon powder and sand, so that domestic resources are rich, and the production cost can be obviously reduced; the raw materials do not contain organic matters and moisture, and the quality of the surface layer coating is not influenced. Compared with the traditional production process of zircon sand and white corundum, the production process of zircon sand and white corundum is simpler and more energy-saving, has better performance, is suitable for the production of castings made of various materials, and improves the quality of the castings.
Detailed Description
The present invention will be described in detail and specifically with reference to the following examples so as to facilitate the understanding of the present invention, but the following examples do not limit the scope of the present invention.
Example 1
The embodiment discloses a process for manufacturing a shell surface layer by using aluminum-silicon refractory material surface layer powder and sand, which comprises the following steps:
s1, preparing raw materials
Preparing 325-mesh mullite surface layer powder, 60-120-mesh mullite surface layer sand, a binder, a wetting agent and an antifoaming agent;
s2, preparing surface layer coating
Adding an adhesive into a stirring barrel, adding a wetting agent accounting for 0.1 percent of the weight of the adhesive, uniformly mixing, adding mullite surface powder in the stirring process, wherein the ratio of the mullite surface powder to the adhesive is 3: 1, paying attention to prevent powder from caking, and finally adding an antifoaming agent accounting for 0.1 percent of the weight of the adhesive, stirring for more than 12 hours, and controlling the viscosity value of the material to be between 20 and 30 ℃;
s3. upper layer paint
Rotating or moving the module up and down in the coating bucket to prevent the concave angle, the groove and the small hole of the module from collecting bubbles, and removing the bubbles and redundant coatings in the concave angle, the groove and the small hole by lightly blowing compressed air of 0.3-0.35MPa to ensure that the coatings of all parts of the module are uniform and avoid coating shortage, local accumulation and bubble wrapping;
s4, scattering surface sand
And after finishing coating and hanging of the surface coating, immediately spraying a layer of uniform mullite surface sand, uniformly covering each part of the module with the sand, after finishing the sand spraying, putting the module into a surface course room for drying, and waiting for a subsequent process.
The binder in this embodiment is silica sol.
Long-term experiments prove that the mullite surface powder and the surface sand have good coating property, shelling property, casting surface smoothness and casting size precision, and the casting quality can be comparable with zircon powder and sand. In the actual production, 325-mesh mullite surface powder is used for small castings, and 10-20% of 200-280-mesh mullite powder can be added for medium and large castings to prevent surface drying cracking. The mullite has excellent physical and chemical properties, and the produced casting has excellent quality and can be used as a surface layer shell-making material for various metal castings.
Example 2
The embodiment discloses a process for manufacturing a shell surface layer by using aluminum-silicon refractory material surface layer powder and sand, which comprises the following steps:
s1, preparing raw materials
Preparing 325-mesh bauxite clinker surface layer powder, 60-120-mesh bauxite clinker surface layer sand, a binder, a wetting agent and a defoaming agent;
s2, preparing surface layer coating
Adding an adhesive into a stirring barrel, adding a wetting agent accounting for 0.2 percent of the weight of the adhesive, uniformly mixing, adding bauxite chamotte surface layer powder in the stirring process, wherein the ratio of the bauxite chamotte surface layer powder to the adhesive is 2.5: 1, paying attention to prevent powder from caking, and finally adding an antifoaming agent accounting for 0.2 percent of the weight of the adhesive, stirring for more than 12 hours, and controlling the viscosity value of the material to be between 20 and 30 ℃;
s3. upper layer paint
The module is rotated or moved up and down in the coating bucket, bubbles are prevented from being accumulated in the concave corners, the grooves and the small holes of the module, the bubbles and redundant coating in the concave corners, the grooves and the small holes are removed in a brush painting mode, so that the coating of each part of the module is uniform, and coating shortage, local accumulation and bubble wrapping are avoided;
s4, scattering surface sand
And after finishing coating and hanging of the surface layer coating, immediately spraying a layer of uniform bauxite clinker surface layer sand, uniformly covering each part of the module with the sand, after finishing the sand spraying, putting the module into a surface layer house for drying, and waiting for a subsequent process.
The binder in this embodiment is water glass.
Bauxite clinker seems to have many impurities, but after high-temperature calcination, some impurities such as water, sulfur, phosphorus and the like are removed, and the rest impurities such as silicon dioxide, titanium dioxide, ferric oxide and the like also enter a glass phase more at high temperature, wherein the glass phase is an isolation layer for isolating molten metal and a shell material and is also a necessary condition for obtaining the shell which is easy to peel.
The embodiments of the present invention have been described in detail above, but they are merely exemplary, and the present invention is not equivalent to the above described embodiments. Any equivalent modifications and substitutions to those skilled in the art are also within the scope of the present invention. Accordingly, it is intended that all equivalent alterations and modifications be included within the scope of the invention, without departing from the spirit and scope of the invention.
Claims (8)
1. A shell surface layer making process using aluminum-silicon refractory material powder and sand is characterized by comprising the following steps:
s1, preparing raw materials
Preparing surface layer powder of the aluminum-silicon refractory material, surface layer sand of the aluminum-silicon refractory material, a binder, a wetting agent and a defoaming agent;
s2, preparing surface layer coating
Firstly adding an adhesive into a stirring barrel, then adding a wetting agent, uniformly mixing, adding surface layer powder of the aluminum-silicon refractory material during stirring, paying attention to prevent powder from caking, finally adding a defoaming agent, stirring, and controlling the viscosity value of the material to be between 20 and 30 ℃;
s3. upper layer paint
The module is rotated or moved up and down in the coating bucket, so that bubbles are prevented from being accumulated in the concave corners, the grooves and the small holes of the module, and the bubbles and redundant coatings in the concave corners, the grooves and the small holes are removed, so that the coatings of all parts of the module are uniform, and missing coating, local accumulation and bubble wrapping are avoided;
s4, scattering surface sand
And after finishing coating and hanging of the surface layer coating, immediately spraying a layer of uniform aluminum-silicon refractory material surface layer sand, uniformly covering each part of the module with the sand, putting the module into a surface layer room for drying after the sand spraying is finished, and waiting for a subsequent process.
2. A shell-making facing process using a alumino-silica-based refractory powder and sand in accordance with claim 1, wherein the alumino-silica-based refractory facing powder comprises one of a bauxite clinker facing powder or a mullite facing powder.
3. The process of claim 1, wherein the bauxite refractory facing sand comprises one of a bauxite clinker facing sand or a mullite facing sand.
4. The shell facing process using the alumino-silica-based refractory powder and the sand as claimed in claim 1, wherein the alumino-silica-based refractory facing powder has a particle size of 325 mesh and the alumino-silica-based refractory facing sand has a particle size of 60-120 mesh.
5. The shell surface layer making process using the alumina silica-based refractory powder and the sand as claimed in claim 1, wherein the binder is one or more selected from silica sol, water glass and ethyl silicate.
6. The cladding process using alumino-silica-based refractory powder and sand as claimed in claim 1, wherein the removing of excess paint in step S3 is performed by blowing compressed air of 0.3-0.35MPa gently or brushing a brush on the local surface.
7. The shell-making process using the alumina silica-based refractory powder and the sand as claimed in claim 1, wherein the ratio (powder-to-liquid ratio) of the high-alumina surface powder to the binder in the step S2 is 2.5: 1-3: 1; the weight of the wetting agent is 0.2-0.5% of the weight of the adhesive, and the weight of the wetting agent is 0.1-0.2% of the weight of the adhesive.
8. The shell-making process using the alumina silica-based refractory powder and the sand as claimed in claim 1, wherein the stirring time in the step of S2 is more than 12 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111204956.XA CN113953450A (en) | 2021-10-15 | 2021-10-15 | Shell surface layer making process using aluminum-silicon refractory material powder and sand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111204956.XA CN113953450A (en) | 2021-10-15 | 2021-10-15 | Shell surface layer making process using aluminum-silicon refractory material powder and sand |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113953450A true CN113953450A (en) | 2022-01-21 |
Family
ID=79464135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111204956.XA Pending CN113953450A (en) | 2021-10-15 | 2021-10-15 | Shell surface layer making process using aluminum-silicon refractory material powder and sand |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113953450A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103600030A (en) * | 2013-08-30 | 2014-02-26 | 泰州枫叶冶金设备有限公司 | Preparation method of heat-resisting alloy sliding-block shell by investment casting |
| CN112338132A (en) * | 2020-11-04 | 2021-02-09 | 吴应卓 | Process for manufacturing shell surface layer by using compact corundum surface layer powder and surface layer sand |
| CN112705669A (en) * | 2020-12-15 | 2021-04-27 | 吴应卓 | Process for manufacturing shell surface layer by using plate-shaped corundum surface layer powder and surface layer sand |
-
2021
- 2021-10-15 CN CN202111204956.XA patent/CN113953450A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103600030A (en) * | 2013-08-30 | 2014-02-26 | 泰州枫叶冶金设备有限公司 | Preparation method of heat-resisting alloy sliding-block shell by investment casting |
| CN112338132A (en) * | 2020-11-04 | 2021-02-09 | 吴应卓 | Process for manufacturing shell surface layer by using compact corundum surface layer powder and surface layer sand |
| CN112705669A (en) * | 2020-12-15 | 2021-04-27 | 吴应卓 | Process for manufacturing shell surface layer by using plate-shaped corundum surface layer powder and surface layer sand |
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