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Ferrous sulfate modified phosphate binder and preparation method thereof

A ferrous sulfate and phosphate technology, used in manufacturing tools, casting molding equipment, metal processing equipment, etc., can solve the problems of poor stability, low sand mold strength, insufficient moisture absorption resistance, etc., and achieve high moisture absorption resistance and improved strength. , the effect of high mechanical properties

Active Publication Date: 2018-11-30
HUBEI UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current research on phosphate inorganic binders has always had problems such as low sand strength, insufficient moisture absorption resistance, and poor stability.
The performance of the phosphate binder failed to meet the actual production requirements

Method used

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  • Ferrous sulfate modified phosphate binder and preparation method thereof
  • Ferrous sulfate modified phosphate binder and preparation method thereof
  • Ferrous sulfate modified phosphate binder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Preparation of Ferrous Sulfate Modified Phosphate Adhesive

[0027] Raw material ratio:

[0028] 338g of 85% industrial phosphoric acid, 68g of 320 mesh aluminum hydroxide powder, 12g of boric acid, 2g of silicic acid, 8g of magnesium oxide, 0.125g of ferrous sulfate, and 200g of water.

[0029] Preparation steps:

[0030] 1) Add phosphoric acid into the three-port reaction kettle, turn on the agitator and heater, and slowly heat to 200°C;

[0031] 2) After the temperature of phosphoric acid in the reaction kettle rises to 200°C, add aluminum hydroxide powder into the reaction kettle several times in small amounts; each addition needs to completely react the aluminum hydroxide powder added last time, and the process takes about 10 minutes; The sign of complete reaction is that the solution in the reactor is in a transparent state; then add 50g of water and stir to the preset temperature while heating, the process is about 1min;

[0032] 3) Add boric acid powder, cont...

Embodiment 2

[0039] Preparation of Ferrous Sulfate Modified Phosphate Adhesive

[0040] Raw material ratio:

[0041] 338g of 85% industrial phosphoric acid, 68g of 320 mesh aluminum hydroxide powder, 12g of boric acid, 2g of silicic acid, 8g of magnesium oxide, 0.25g of ferrous sulfate, and 200g of water;

[0042] The preparation steps are the same as in Example 1.

Embodiment 3

[0044] Preparation of Ferrous Sulfate Modified Phosphate Adhesive

[0045] Raw material ratio:

[0046] 338g of 85% industrial phosphoric acid, 68g of 320 mesh aluminum hydroxide powder, 12g of boric acid, 2g of silicic acid, 8g of magnesium oxide, 1g of ferrous sulfate, 200g of water;

[0047] The preparation steps are the same as in Example 1.

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Abstract

The invention discloses a ferrous sulfate modified phosphate binder and a preparation method thereof. The ferrous sulfate modified phosphate binder is prepared from raw materials as follows: 53.74%-53.81% of phosphoric acid for industrial use, 10.81%-10.83% of aluminium hydroxide powder, 1.908%-1.910% of boric acid, 0.318% of silicic acid, 1.272%-1.274% of magnesium oxide, 0.02%-0.159% of ferroussulfate and 31.8%-31.84% of water. The preparation method comprises following steps: the raw materials are added in specific sequence, and with addition of ferrous sulfate, a macromolecular compound with constitution water can be formed in a reaction process, so that the finally prepared phosphate binder has higher stability and higher moisture absorption performance. A test indicates that a sandmold prepared from the binder has higher instant strength and constant-humidity room (RH40%) 6h strength, the maximum instant strength can reach 1.86 MPa, and the maximum constant-humidity room (RH40%) 6h strength can reach 1.76 MPa.

Description

technical field [0001] The invention belongs to the field of foundry industry, and in particular relates to a phosphate binder modified by sulfate materials and a preparation method thereof. Background technique [0002] Phosphate binder is a new type of green and environment-friendly inorganic resin for foundry. Compared with traditional organic resin, it has the advantages of non-toxicity, good collapsibility, and high recycling rate of molding sand. However, the current research on phosphate inorganic binders has always had problems such as low sand strength, insufficient moisture absorption resistance, and poor stability. The performance of the phosphate binder fails to meet the actual production requirements. Contents of the invention [0003] In order to solve the above technical problems, the present invention provides a phosphate adhesive modified by ferrous sulfate and a preparation method thereof, aiming at improving the bonding strength and moisture resistance ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/18
CPCB22C1/185
Inventor 张友寿刘栋夏露任彦臻蔡鹏周磊
Owner HUBEI UNIV OF TECH
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