Preparation method and application of phosphate inorganic casting binder suspension curing agent

The technology of curing agent and suspension is applied in the field of preparation of curing agent used in phosphate inorganic foundry binder, which can solve the problems of easy generation of dust pollution, no curing agent found, and insufficient dispersion, and achieves easy popularization and application, elimination of The effect of moisture absorption and high curing strength

Inactive Publication Date: 2011-01-12
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For phosphate inorganic binders, the commonly used curing agent is powdered magnesium oxide, but this curing agent is not only easy to be damp and agglomerated, but also prone to dust pollution and inconvenient quantification during use, so it is difficult to popularize and apply
[0005] If a liquid curing agent can be invented, and the cost is low, it will be very beneficial to the application of this new type of adhesive. From the existing literature, no curing agent in liquid state has been found.
However, when the curing agent in a pure liquid state is mixed with a phosphate inorganic binder, the dispersion is not uniform enough
[0006] If powdered magnesium oxide is made into a suspension form curing agent, it can solve the problem of insufficient dispersion when mixed with phosphate inorganic binders

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 200g of methanol into a container equipped with a stirring device, then add 3g of polyvinyl butyral, and then stir for about 10 minutes to fully dissolve it to obtain a uniform solution, then add 0.5g of citric acid, and continue to stir for about 8 minutes to completely dissolve it , thus obtaining a carrier solution. Then weigh 350g of metallurgical magnesia powder, add the metallurgical magnesia powder into the carrier solution, and stir in a mixer at 3000 rpm for 10 minutes to obtain the required suspension solidifying agent.

Embodiment 2

[0023] Add 200g of ethanol to a container equipped with a stirring device, then add 4g of polyvinyl butyral, and then stir for about 10 minutes to fully dissolve it to obtain a uniform solution, then add 0.25g of citric acid, and continue to stir for about 8 minutes to completely dissolve it , thus obtaining a carrier solution. Then weigh 300g of metallurgical magnesia powder, add the metallurgical magnesia powder into the carrier solution, and stir in a mixer at 2900 rpm for 15 minutes to obtain the required suspension solidifying agent.

Embodiment 3

[0025] Add 200g of isopropanol to a container equipped with a stirring device, then add 5g of polyvinyl butyral, and then stir for about 10 minutes to fully dissolve it to obtain a uniform solution, then add 0.25g of oxalic acid, and continue to stir for about 8 minutes to make it completely dissolved, thereby obtaining a carrier solution. Then weigh 300g of fused magnesia powder, add the fused magnesia powder into the carrier solution, and in a container with a stirrer, first stir at a low speed of 1000-1500 rpm for about 5 minutes for pre-dispersion, and then pour In the colloid abrasive hopper, start the colloid mill, discharge the material from the outlet of the colloid mill, pour the material back into the colloid abrasive hopper, and then discharge the material from the outlet of the colloid mill to obtain the required suspension curing agent.

[0026] Comparative Experiment

[0027] Common powdered magnesium oxide and the suspension solidifying agent prepared by the pr...

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Abstract

The invention discloses a phosphate inorganic casting binder suspension curing agent and a preparation method thereof. The preparation method comprises the following steps of: adding organic resin to an alcoholic solvent; stirring to be fully dissolved and adding organic acid; stirring to be fully dissolved and then adding powder magnesia; and evenly stirring and dispersing to prepare the suspension curing agent. The invention also discloses the application of the curing agent to the foundry industry. The preparation method of the phosphate inorganic casting binder suspension curing agent is simple and adopts easily obtained raw materials with lower cost. The curing agent has the excellent performances of high efficiency, suspension rate and solid content, free toxicity, moderate reaction speed with the binder, and the like; a casting sand mould bonded by utilizing the curing of the curing agent and the organic binder has high sintering strength and stable sintering performance without a dust flying phenomenon in a sand-mixing process or generating dust pollution and is easy to popularize and apply in the foundry industry.

Description

technical field [0001] The invention relates to the technical field of casting, in particular to a preparation method and application of a curing agent used in phosphate inorganic casting binders. Background technique [0002] The foundry industry has developed into one of the most important industries in my country in the past 20 years. my country has become a big foundry country. The output of China's foundry industry ranks first in the world for 7 consecutive years, accounting for 1 / 3 of the global total output. [0003] However, with the development of foundry, the environmental pollution caused by the foundry industry has attracted widespread attention. The pollution caused by the foundry industry has become one of the main sources of air, soil and water pollution. The main forms of pollution are: on-site toxic gas, dust, flue gas, industrial waste water and waste residue, and a large amount of untreated old sand discarded outside the factory. Among all foundry pollut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/18
Inventor 张友寿黄晋夏露李四年
Owner HUBEI UNIV OF TECH
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