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Composite curing agent for phosphate casting binder and preparation method of composite curing agent

A technology of composite curing agent and binder, which is applied in the direction of casting molding equipment, casting molds, manufacturing tools, etc., can solve the problems of low curing strength and difficult control of reaction speed, and achieve appropriate demoulding time and moderate demoulding time , good reusability effect

Inactive Publication Date: 2011-06-08
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that the phosphate binder self-setting sand with a single curing agent has the problem that the reaction speed is not easy to control and the curing strength is not high, the invention provides a composite curing agent for phosphate casting binder and its preparation method. Without increasing the amount of phosphate binder, the demoulding time of the molding sand can be easily controlled, and the tensile strength of the molding sand can be greatly improved

Method used

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  • Composite curing agent for phosphate casting binder and preparation method of composite curing agent

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Embodiment 1

[0017] With 80 mass parts of magnesium oxide content greater than 96% (weight), 1000 mesh fused magnesia powder as the main body of the curing agent, then add 20 mass parts of iron powder, after preliminary stirring, pour into the rubber tank of the ball mill, ball mill 2 hours to make a composite curing agent.

Embodiment 2

[0019] With 90 mass parts of magnesium oxide content greater than 96% (weight), 1000 mesh fused magnesia powder as the main body of the curing agent, then add 10 mass parts of aluminum powder, after preliminary stirring, pour into the rubber tank of the ball mill, ball mill 2 hours to make a composite curing agent.

Embodiment 3

[0021] With 70 parts by mass of magnesium oxide content greater than 96% (weight), 1000 mesh fused magnesia powder as the main body of the curing agent, then add 30 parts by mass of zinc powder, after preliminary stirring, pour into the rubber tank of the ball mill, ball mill 2 hours to make a composite curing agent.

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Abstract

The invention provides a composite curing agent for a phosphate casting binder. Fused magnesia powder is utilized as the main component of the composite curing agent, metal element powder or metal oxide powder is added, and stirring and ball-milling are carried out on the fused magnesia powder and the metal element powder or metal oxide powder, thus the composite curing agent is prepared, whereinthe added quantity of the fused magnesia powder is 70-90wt% of the composite curing agent; and the added quantity of the metal element powder or metal oxide powder is 10-30wt% of the composite curingagent. The no-bake phosphate binder of the composite curing agent provided by the invention has the advantages of moderate demoulding time, high sand mould (core) strength and good recyclability of moulding sand, prevents any environmental pollution during the usage, and can completely meet the requirements of casting production.

Description

technical field [0001] The invention relates to a composite curing agent, in particular to a composite curing agent used for phosphate casting binders in sand casting production and a preparation method thereof. Background technique [0002] With people's increasing awareness of environmental protection, the requirements for adhesives have also increased. Although organic binders are superior in performance, most of them have pungent odors, produce smoke and release harmful gases after burning, which are harmful to the protection of the environment and the health of operators. Clay and water glass are the most widely used inorganic binders. Clay is gradually being replaced by water glass and organic resin due to the disadvantages of low sand mold strength. The biggest disadvantage of water glass is poor collapsibility and difficult regeneration of molding sand. [0003] Phosphate casting binder, as an inorganic binder, has the advantages of good collapsibility, less environ...

Claims

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Application Information

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IPC IPC(8): B22C1/18
Inventor 张友寿夏露商宏飞黄晋李四年
Owner HUBEI UNIV OF TECH
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