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Mullite/magnesia composite alcohol-base casting paint and production method thereof

A technology of foundry coating and rhombohedral clay, which is used in foundry molding equipment, coatings, molds, etc., can solve the problems of weak sand resistance, poor chemical stability, single function of alcohol-based foundry coatings, etc., and achieve strong thermal insulation. Effect

Inactive Publication Date: 2014-09-03
郭菲
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, alcohol-based casting coatings in the prior art have many defects, such as poor suspension stability, easy delamination during long-distance transportation and storage, poor high temperature resistance, low hardness, poor chemical stability, and low metal erosion resistance. , weak sand resistance, etc., make alcohol-based casting coatings have a single function and cannot meet large-scale industrial production

Method used

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Experimental program
Comparison scheme
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Embodiment Construction

[0014] The mullite / magnesite composite alcohol-based casting coating is characterized in that it is made of the following raw materials in parts by weight: 75 parts by weight of mullite, 23 parts by weight of magnesite, 15 parts expanded perlite, and 15 parts by weight of palygorskite. Clay 1, rosin 3, magnesium hydroxide 0.5, urea 0.3, rock wool scrap 1, corn straw 12, phenolic resin 3, hexamethylenetetramine 4, ethanol 45, additive 5.

[0015] The auxiliary agent is made of the following raw materials in parts by weight: pig bone 26, rectorite 38, metakaolin 85, silica fume 30, silane coupling agent KH-5702, silica sol 0.4, nanometer silicon carbide powder 1, nanometer four Ferric oxide 1.2, angelica powder 0.6, sodium carboxymethyl starch 0.4, carboxymethyl cellulose 4, appropriate amount of water, the preparation method is to put pig bone, rectorite and metakaolin in a calciner at 560-680°C Calcined at low temperature for 2-3 hours, took it out, soaked it in 8-12% hydrochl...

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Abstract

The invention discloses mullite / magnesia composite alcohol-base casting paint. The mullite / magnesia composite alcohol-base casting paint is characterized by comprising the following raw materials in parts by weight: 65 to 85 arts of mullite, 20 to 30 parts of magnesia, 15 to 20 parts of expanded perlite, 1 to 3 parts of palygorskite clay, 3 to 6 parts of rosin, 0.5 to 0.8 part of magnesium hydroxide, 0.3 to 0.6 part of urea, 1 to 3 parts of rock wool leftovers, 12 to 15 parts of corn straw, 3 to 5 parts of phenolic resin, 4 to 6 parts of hexamine, 45 to 60 parts of ethanol and 3 to 6 parts of additives. The rock wool leftovers are used as a heat-preserving material, and other appropriate additives are also added, so that the prepared paint is high in heat preserving property, flame retardant property, adhesion property, coating property and suspension property. The paint also can prevent the paint from being oxidized, so that the surface of a casting is smooth and free from a sand hole and a crack.

Description

technical field [0001] The invention relates to the field of casting coatings, in particular to a mullite / magnesite composite alcohol-based casting coating and a preparation method thereof. Background technique [0002] Foundry coatings refer to casting auxiliary materials that are used to coat the surface of the cavity or sand core to change their surface refractoriness, chemical stability, metal erosion resistance, sand sticking resistance, etc. It is composed of various properties. It is a dispersion system composed of high-quality materials, and its composition mainly includes refractory materials, suspending agents, carriers, binders and special additives. When acting on castings, it is required that the coating has good process performance, work performance, quality stability and application reproducibility. Prevent defects such as cracking, trachoma, and white iron formation caused by excessive local cooling of casting products. There are many kinds of casting coati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C3/00
Inventor 方学军
Owner 郭菲
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