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.

Inactive Publication Date: 2007-01-24
刘满对 +1
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the artificial foundry sand used in large quantities is mainly produced from natural silica sand or artificially crushed 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, there are multiple phase transitions, and it is easy to produce 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

Method used

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  • Novel artificial casting sand and its preparing method

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Effect test

Embodiment 1

[0017] A new type of artificial foundry sand of the present invention adopts AL 2 o 3 45-90% silica alumina as raw material.

Embodiment 2

[0019] A kind of preparation method of novel artificial foundry sand is:

[0020] 1. Will contain AL 2 o 3 45-90% bauxite ore is added to an electric arc furnace (the size of the furnace is 650-850mm cube), and arc discharge is used to generate high temperature to be calcined and melted into liquid.

[0021] 2. When the liquid flows out of the furnace, apply an air pressure of 70-85m / s (pressure 3.0-8.0kg / cm 2 ), using strong wind to crush and cool the liquid raw material to obtain spherical sand particles.

[0022] 3. Sieve the spherical sand to produce a new type of artificial foundry sand.

Embodiment 3

[0024] The novel artificial foundry sand of the present invention can be used in molding methods such as furan resin, phenolic resin, phenolic urethane resin, water glass and bentonite.

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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.

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

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/00
Inventor 刘满对王柏勤
Owner 刘满对
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