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Magnesium aluminium spinel powder alcohol-based coating for heavy section steel castings and preparation method thereof

A technology of magnesia-aluminum spinel powder and steel castings, which is applied to casting molding equipment, coatings, casting molds, etc., can solve the problems of difficulty in obtaining suspension, high density of zircon, and high Mohs hardness, and achieve excellent Suspension stability, high strength, good anti-sticking sand performance

Inactive Publication Date: 2010-05-12
CHINA YITUO GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Zircon has a relatively high density of "4.6-4.7" g / cm 3 , the Mohs hardness is high "7-8" level, and the alcohol-based coating prepared by processing into zircon powder has a high density. It is difficult to obtain excellent suspending property if the general suspending agent and mixing process are used.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0041] A method for preparing a magnesium-aluminum spinel powder alcohol-based coating for thick and large steel castings; the preparation method of the alcohol-based coating comprises the following steps: 1. Pretreatment of a binder, a suspending agent, and a suspension thickener; 2. Dispersion of each component; 3. Dilute and stir; 4. Performance test and adjustment; 5. Finished product barreling;

[0042] The specific preparation process of the alcohol-based paint is:

[0043] 1), pretreatment:

[0044] The binder and the suspension thickener are respectively dissolved in a certain amount of organic solvent, fully dissolved and then used; after the suspending agent is swollen with water, a certain amount of organic solvent is added to dissolve it and then used.

[0045] 2), mixing:

[0046] A. First add refractory aggregate and iron oxide powder to the roller sand mixer according to the design requirements and mix evenly;

[0047] B. Then add the pretreated binder, suspe...

Embodiment 1

[0054] Magnesium-aluminum spinel powder alcohol-based paint by weight: 55% refractory aggregate, 0.5% binder, 0.11% thickener, 1.1% suspending agent, 2.7% co-solvent, 40.59% organic solvent.

[0055] The mixing process is the same as mentioned above.

Embodiment 2

[0057] Magnesium-aluminum spinel powder alcohol-based paint by weight: 57% refractory aggregate, 0.9% binder, 0.15% thickener, 1.5% suspending agent, 3.5% co-solvent, 36.95% organic solvent.

[0058] The mixing process is the same as mentioned above.

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Abstract

The invention discloses a magnesium aluminum spinel powder alcohol-based coating for heavy section steel castings, and relates to a casting coating. The alcohol-based coating comprises the following components in percentage by weight: 55 to 60 percent of magnesium aluminium spinel powder, 0.5 to 1.2 percent of binder, 0.11 to 0.18 percent of suspended thickening agent, 1.1 to 1.8 percent of suspending agent, 2.7 to 4.2 percent of fluxing agent, and the balance of organic solvent. In the magnesium aluminum spinel powder alcohol-based coating, the particle size of the magnesium aluminum spinel powder is between 270 and 320, and Al2O3 is more than or equal to 78 percent. The magnesium aluminum spinel powder is synthesized by electric smelting technology, has the characteristics of low expansion and high smelting point, and meets the requirement of serving as refractory aggregate of the coating for the steel castings; and the magnesium aluminum spinel powder has obvious price and resource advantages than zircon powder.

Description

【Technical field】 [0001] The invention relates to a casting coating, in particular to a magnesium-aluminum spinel powder alcohol-based coating used in the production of thick and large steel castings by a sodium silicate sand molding process. 【Background technique】 [0002] It is known that in foundry production, the quality of the working surface of the mold and the core will directly affect the quality of the surface of the finished casting. Coating the working surface of the mold and the core is to ensure the quality of the later stage. One of the important measures of excellent castings. Existing foundry coatings are usually composed of refractory aggregates, carrier liquids, suspending agents, binders, thickeners and additives. Among them, the refractory aggregate is the most important component of the coating. It is suspended in the coating by means of a suspending agent and is evenly coated on the working surface of the casting core. When the carrier liquid volatiliz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C3/00
Inventor 蔡安克陈莉郭亚辉李锋军刘文曾程俊伟靖琦李朝峰段华荣
Owner CHINA YITUO GROUP
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