A kind of modified phosphate inorganic binder for aluminum alloy casting and preparation method thereof

An inorganic binder and phosphate technology, applied in casting molding equipment, metal processing equipment, casting molds, etc., can solve the problems of poor hygroscopicity and collapsibility, low bonding strength, restricting development, etc., and achieve anti-hygroscopic performance. Excellent, excellent collapsibility, low cost effect

Active Publication Date: 2018-05-01
共享新材料(山东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its low bond strength, poor moisture absorption resistance and poor collapse performance have always restricted its development in the aluminum alloy casting industry.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The raw materials of the modified phosphate inorganic binder in this example are: 85% (mass concentration) industrial phosphoric acid 33%, aluminum hydroxide 6%, magnesium carbonate 2.5%, boric acid 1.5%, citric acid 0.8%, zinc oxide 2%, polyacrylamide 0.3%, deionized water 53.9%.

[0022] The preparation method of the present embodiment modified phosphate inorganic binder:

[0023] Step 1: Add 60Kg aluminum hydroxide and 539Kg deionized water into the enamel reaction kettle, start stirring and start heating to a slight boiling state;

[0024] Step 2: Slowly add 330Kg of industrial phosphoric acid. After the reaction is clear and transparent, add 15Kg of boric acid and continue the reaction until it is transparent. Add 25Kg of magnesium carbonate. After the reaction is transparent, continue to stir the reaction for at least 30 minutes;

[0025] Step 3: Slowly add 8Kg of citric acid, after the reaction is transparent, add 20Kg of zinc oxide, after the reaction is transp...

Embodiment 2

[0029] The raw materials of the modified phosphate inorganic binder in this example are: 85% (mass concentration) industrial phosphoric acid 36%, aluminum hydroxide 8%, magnesium carbonate 3.5%, boric acid 2.5%, citric acid 1%, zinc oxide 3%, polyacrylamide 0.5%, deionized water 45.5%.

[0030] The preparation method of the present embodiment modified phosphate inorganic binder:

[0031] Step 1: Add 80Kg aluminum hydroxide and 455Kg deionized water into the enamel reaction kettle, start stirring and start heating to a slight boiling state;

[0032] Step 2: Slowly add 360Kg of industrial phosphoric acid. After the reaction is clear and transparent, add 25Kg of boric acid and continue the reaction until it is transparent. Add 35Kg of magnesium carbonate. After the reaction is transparent, continue to stir the reaction for at least 30 minutes;

[0033] Step 3: Slowly add 10Kg of citric acid, after the reaction is transparent, add 30Kg of zinc oxide, and after the reaction is tra...

Embodiment 3

[0037] The raw materials of the modified phosphate inorganic binder in this example are: 85% (mass concentration) industrial phosphoric acid 38%, aluminum hydroxide 10%, magnesium carbonate 4%, boric acid 3%, citric acid 1.5%, zinc oxide 3.5%, polyacrylamide 0.6%, deionized water 39.4%.

[0038] The preparation method of the present embodiment modified phosphate inorganic binder:

[0039] Step 1: Add 100Kg aluminum hydroxide and 394Kg deionized water into the three-hole reaction kettle, start stirring and start heating to a slight boiling state;

[0040] Step 2: Slowly add 380Kg of industrial phosphoric acid. After the reaction is clear and transparent, add 30Kg of boric acid and continue the reaction until it is transparent. Add 40Kg of magnesium carbonate. After the reaction is transparent, continue to stir the reaction for at least 30 minutes;

[0041] Step 3: Slowly add 15Kg of citric acid, after the reaction is transparent, add 35Kg of zinc oxide, and after the reaction ...

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Abstract

The present invention relates to a novel modified phosphate inorganic binder for aluminum alloy casting, and a preparation method thereof, wherein the novel modified phosphate inorganic binder comprises industrial phosphoric acid with a mass concentration of 85%, aluminum hydroxide, magnesium carbonate, boric acid, citric acid, zinc oxide, polyacrylamide, and deionized water. The novel modified phosphate inorganic binder has characteristics of high compressive strength, excellent adhesion property, excellent collapsing performance, and green environmental protection, and can not produce any toxic gases and condensates during processes such as sand mixing, modeling (core), hardening and casting. The preparation method has characteristics of simple process, flexible operation, and low cost.

Description

technical field [0001] The invention relates to the field of casting auxiliary materials, in particular to a modified phosphate inorganic binder for aluminum alloy casting and a preparation method thereof. Background technique [0002] Since the 1960s, organic synthetic resins have been widely used in the foundry industry as a new generation of foundry binders. [0003] In recent years, with the development of the foundry industry, the deficiencies and shortcomings of organic resins as sand casting binders have slowly begun to emerge. Its high cost, serious pollution to the environment during the use and treatment of resin sand, and its limitations in casting quality control have seriously restricted the development of organic resin binders. In order to cater to the "green casting" concept of high efficiency, energy saving, and environmental protection, it has become the consensus of foundry workers to develop an inorganic binder for foundry that has performance comparable ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C1/18
CPCB22C1/185
Inventor 刑金龙陈学更
Owner 共享新材料(山东)有限公司
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