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Inorganic nanoparticle modified water glass and preparation method thereof

A technology of inorganic nanoparticles and modified water, which is applied in the direction of manufacturing tools, casting molding equipment, metal processing equipment, etc., can solve the problems of poor collapsibility, low bonding strength, and difficulty in recycling old sand, so as to reduce residual Strength, easy recycling, and improved collapsibility

Active Publication Date: 2018-11-02
浙江遂金特种铸造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problems existing in the above-mentioned prior art, and provides a kind of inorganic nano-particle modified water glass and its preparation method, which solves the problems of low bonding strength, poor collapsibility and difficult recycling of old sand faced by water glass sand. , greatly improved the collapsibility of water glass, greatly improved the recovery rate of old sand, reduced environmental pollution, and promoted the development of green casting technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Dissolve aluminum chloride, ferric chloride and copper chloride in ethanol (the mass ratio of aluminum chloride, ferric chloride, copper chloride and ethanol is 4.0:2.0:1.0:3.0), mix with water glass, first Ultrasonic oscillation was carried out for 10 minutes to make it evenly mixed, and then stirred at a water bath temperature of 60° C. for 30 minutes, and then the pH was adjusted to 6 to obtain a uniformly mixed inorganic nanoparticle-modified water glass. At this time, the normal temperature strength of the water glass sand made is 21.1% higher than that of ordinary water glass, while the residual strength is reduced by 34.5%.

Embodiment 2

[0014] Dissolve aluminum nitrate, zinc nitrate, copper nitrate and beryllium nitrate in ethanol (the mass ratio of aluminum nitrate, zinc nitrate, copper nitrate, beryllium nitrate and ethanol is 4.0:1.0:1.0:0.5:3.5), and mix with water glass Firstly, ultrasonically oscillate for 15 minutes to make it evenly mixed, then stir for 60 minutes at a water bath temperature of 40° C., and then adjust the pH to 8 to obtain uniformly mixed inorganic nanoparticle-modified water glass. At this time, the room temperature strength of the water glass sand made is 28.0% higher than that of ordinary water glass, while the residual strength is reduced by 36.1%.

Embodiment 3

[0016] Dissolve aluminum nitrate and zinc nitrate in ethanol (mass ratio of aluminum nitrate, zinc nitrate and ethanol is 5.5:1.5:3.0), mix with water glass, first carry out ultrasonic vibration for 12 minutes to make it evenly mixed, and then at 50°C Stir for 20 minutes at the temperature of the water bath, and then adjust the pH to 5 to obtain a uniformly mixed inorganic nanoparticle modified water glass. At this time, the normal temperature strength of the water glass sand made is 17.2% higher than that of ordinary water glass, while the residual strength is reduced by 12.3%.

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Abstract

The invention discloses modified sodium silicate with inorganic nanoparticles and a preparation method thereof. The modified sodium silicate with the inorganic nanoparticles is mainly composed of the uniformly attached inorganic nanoparticles prepared by a hydrolysis precipitation method and ordinary sodium silicate. The specific preparation method mainly comprises the following steps that metal nitrate or metal chloride salt is dissolved by ethyl alcohol and then mixed with the sodium silicate, ultrasonic oscillation is carried out for 10-15 minutes to enable the mixture to be uniformly mixed, then stirring is carried out for 20-60 minutes at a water bath temperature of 40-60 DEG C, and then pH is adjusted to be 5-8 to obtain the modified sodium silicate with the inorganic nanoparticles which are uniformly mixed. According to the modified sodium silicate with the inorganic nanoparticles prepared by the method, the content of the sodium silicate in molding sand can be effectively reduced, so that the collapsibility of the sodium silicate sand is greatly improved; and the molding sand prepared by the modified sodium silicate with the inorganic nanoparticles also has good comprehensive high-temperature performance, the gas evolution of the molding sand is remarkably reduced, and the quality of a casting is improved.

Description

technical field [0001] The invention relates to the casting field, in particular to an inorganic nanoparticle modified water glass and a preparation method thereof. Background technique [0002] At present, with the rapid development of industry, energy consumption and environmental pollution have brought enormous pressure to the sustainable development of China's economy. In China's national development plan, energy conservation, emission reduction, green manufacturing and circular economy are the focus of national social and economic development. As an important part of China's manufacturing industry, the foundry industry has also produced large energy and environmental problems while developing rapidly. At present, my country is the world's largest casting country, with an annual casting output of more than 30 million tons, far exceeding the 12 million tons of the second largest casting country (the United States). However, the higher the yield, the more serious the res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C1/18
CPCB22C1/188
Inventor 施利进姜银珠
Owner 浙江遂金特种铸造有限公司
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