Novel artificial casting sand and its preparing method

A foundry sand and artificial technology, which is applied in the direction of casting molding equipment, molds, cores, etc., can solve the problems of high thermal expansion rate, low recycling rate, and easy breakage of silica sand, and achieve low thermal expansion rate and suppress casting defects.
CN1899722AInactive Publication Date: 2007-01-24刘满对 +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
刘满对
Publication Date
2007-01-24
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention is technological process of producing artificial casting sand and its application. The artificial casting sand is produced with bauxite ore containing Al2O3 in 45-90 % as material in an arc furnace. Bauxite ore material is first smelted in an arc furnace, and the outflow liquid is applied with air pressure of 3.0-8.0 kg / sq cm to be crushed, so that spherical casting sand with smooth surface is obtained. The artificial casting sand may be used for molding together with furan resin, phenolic resin, water glass, etc. The present invention has the features of environment friendship, high heat resistance, high strength, low heat expansion, low production cost, etc.
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Description

【Technical field】

[0001] The invention belongs to casting molding sand and its application, in particular to a novel artificial casting sand and a preparation method thereof. 【technical background】

[0002] At present, the artificial foundry sand used in large quantities is mainly produced from natural silica sand or artificially broken silica sand. It has the following disadvantages in the molding and casting process: 1. The refractory temperature is not ideal. 2. Silica sand expands after being heated and is easily broken and pollutes the environment. Among them, SIO 2 Dust is prone to silicosis, which seriously endangers the health of production workers. 3. The thermal expansion rate of silica sand is high, and there are multiple phase transitions, which are prone to casting defects. 4. Silica sand, especially artificially crushed sand, is not good in shape. 5. The recycling rate is low and the regeneration performance is not good.

[0003] 【Purpose of the invention】 ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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