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Additivated coal dust with water soluble carbohydrates for use in the green sand composition for casting molding

A technology of carbohydrates and green sand, applied in the direction of casting molding equipment, molds, cores, etc., can solve the problems of high cost, gas side reactions, and the inability to reduce industrial waste foundry sand

Inactive Publication Date: 2009-09-23
COQUE DO SUL DO BRASIL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Regarding the sintering problem, coal dust, known as a pure vitreous carbon generator, can inhibit sand sintering, however excessive use of coal dust will lead to side reactions that generate gas on the part
[0010] Faced with these realities, we are known by other researchers to use added coal powders containing water-insoluble hydrocarbons, however, the use of these hydrocarbons is usually very expensive and does not reduce the recovery of foundry sand from industrial waste

Method used

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Examples

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Effect test

Embodiment 1

[0041] How to obtain coal dust with added carbohydrates - sucrose

[0042] In order to obtain the added coal dust according to the invention, silk coal dust having the above-mentioned characteristics can be used.

[0043] The carbohydrate additives used in this example correspond to oligosaccharides or small sugargroups, which are carbohydrates composed of 2-10 monosaccharide molecules, in this example sucrose.

[0044] Sucrose, corresponding to traditional cane or red beet sugar, commonly known as refined sugar, was machined in this example at an optimum ratio of 40% to 60% silk coal dust at an optimum maximum temperature of 40°C. mix.

[0045] In this way, sucrose-added coal dust is obtained, which has a high content of glassy carbon, which prevents sintering of the sand on the casting and ensures excellent smoothness of the casting.

[0046]Therefore, the present invention has been proposed to obtain a carbohydrate-added coal dust which can be used in the green sand com...

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Abstract

Coal dust additivated with water soluble carbohydrates for use in the green sand composition for molding of castings refers to a process for obtaining coal additivated with carbohydrates to be used in the green molding sand composition, commonly used for making casting molds, having as a scope to inhibit the sand sintering on the castings and so to improve their finish.

Description

technical field [0001] The present invention relates to an addeditivated coal composition containing carbohydrates used in green molding sand generally used in the manufacture of casting molds, which has the effect of inhibiting the sintering of the sand on the part to improve the smoothness of the part effect. Background technique [0002] The product described so far belongs to the chemical industry and its purpose is to provide the market with high performance added coal dust, enabling better recycling of the returning sand in foundry and enabling it to obtain the multiple advantage. [0003] It is important to point out that, with the aim of improving the green sand composition, the applicant has submitted on October 20, 2006, the use of An additive bentonite component was developed in P10604327-5 of "Added sodium bentonite" and the subject matter disclosed in this invention is a continuation of the inventors' research. [0004] So-called green sand, whose components ...

Claims

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Application Information

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IPC IPC(8): C22B9/16B22C1/00
CPCB22C1/26Y10S106/01Y02E60/32
Inventor 阿纳尔多·罗马诺斯
Owner COQUE DO SUL DO BRASIL
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