Shell-making surface layer process using aluminum-silicon refractory material powder and sand

A refractory material, aluminum-silicon system technology, applied in the field of investment precision casting, can solve the problems of surface coating and casting quality, high price of zircon sand powder, poor zirconium ore resources, etc., to reduce production costs and improve production process Simple energy saving and the effect of improving the quality of castings

Pending Publication Date: 2022-01-21
吴应卓
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many impurities such as organic matter, moisture, various metals and their oxides. These impurities have a great impact on the quality of the surface coating and castings, and will also reduce their refractoriness.
The presence of organic matter will cause problems such as cracking of the coating surface
In addition, my country's zircon ore resources are poor, and it has long relied on imported zircon sand ore from Australia and South Africa, which is also the reason for the high price of domestic zircon sand powder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This embodiment discloses a process of using aluminum-silicon refractory surface layer powder and sand to make a shell surface layer, including the following steps:

[0026] S1. Prepare raw materials

[0027] Prepare 325 mesh mullite surface layer powder, 60-120 mesh mullite surface layer sand, binder, wetting agent and defoamer;

[0028] S2. Configure surface coating

[0029] First add the binder into the mixing tank, then add 0.1% of the binder weight wetting agent and mix evenly, add mullite surface layer powder during the stirring process, the ratio of mullite surface layer powder to binder is 3:1 , and pay attention to prevent the powder from agglomerating, and finally add a defoamer with a binder weight of 0.1% and stir for more than 12 hours, and control the viscosity of the material between 20″-30″;

[0030] S3. Top layer coating

[0031] Rotate the module in the paint bucket or move it up and down to prevent air bubbles from collecting in the concave corners...

Embodiment 2

[0037] This embodiment discloses a process of using aluminum-silicon refractory surface layer powder and sand to make a shell surface layer, including the following steps:

[0038] S1. Prepare raw materials

[0039] Prepare 325 mesh bauxite clinker surface layer powder, 60-120 mesh bauxite clinker surface layer sand, binder, wetting agent and defoamer;

[0040] S2. Configure surface coating

[0041] First add the binder into the mixing tank, then add 0.2% of the binder weight wetting agent and mix evenly, add the bauxite clinker surface layer powder during the stirring process, the ratio of the bauxite clinker surface layer powder to the binder 2.5:1, and pay attention to prevent powder agglomeration, finally add defoamer with 0.2% binder weight and stir, stir for more than 12 hours, and control the viscosity of the material between 20″-30″;

[0042] S3. Top layer coating

[0043] Rotate or move the module up and down in the paint bucket to prevent air bubbles from accumula...

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Abstract

The invention discloses a shell-making surface layer process using aluminum-silicon refractory material powder and sand. Bauxite clinker or mullite is used for replacing zircon powder and sand products, plenty of domestic resources are available, and the production cost can be remarkably reduced; and the raw materials do not contain organic matters or water which may reduce the quality of a surface layer coating. Compared with a traditional production process of zircon sand and white corundum, the production process is simpler, uses less energy, is better in performance, is suitable for production of castings made of various materials, and improves the quality of the castings.

Description

technical field [0001] The invention relates to the field of investment precision casting, in particular to a process for making a shell surface layer using aluminum-silicon refractory powder and sand. Background technique [0002] Zircon sand powder is the most widely used and most successful in the precision casting industry, but zircon sand is a natural mineral that has not been further processed. There are many impurities such as organic matter, moisture, various metals and their oxides. These impurities have a great impact on the quality of the surface coating and castings, and will also reduce their refractoriness. The presence of organic matter can cause problems such as cracking of the coating surface. In addition, my country's zircon ore resources are poor, and it has long relied on imported zircon sand ore from Australia and South Africa, which is also the reason for the high price of domestic zircon sand powder. [0003] Therefore, the precision casting field ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/04B22C1/00
CPCB22C9/04B22C1/00
Inventor 吴应卓
Owner 吴应卓
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