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Suspension curing agent for hardening of phosphate binding agent with water as carrier and preparation method thereof

A technology of suspension and curing agent, which is used in the foundry industry and the field of materials for manufacturing sand molds or sand cores. It can solve the problems of easy hardening of magnesia powder and achieve the effect of suspension and wetting

Inactive Publication Date: 2016-09-21
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the curing agent magnesia powder that can be used for phosphate binder hardening is mainly composed of magnesium oxide. The most prominent problem of magnesia powder is that it is easy to harden when it meets water. For example, magnesia powder placed in the air can absorb water and harden. , magnesia powder dispersed in water is easier to harden, and finally hardens into a hardened body like concrete

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A kind of preparation method of suspension curing agent for phosphate binder hardening with water as carrier:

[0019] Weigh 660 grams of magnesia powder and 1.6 grams of HPMC, add the two into the wheel-type mixer, start the machine and mix for 8 minutes, make the two fully mixed, obtain the mixed dry material, and stop the machine; then weigh 420 grams of water , 16 grams of citric acid, 2.4 grams of defoamer, dissolve citric acid in water, then add defoamer and stir well to obtain a mixed aqueous solution; then start the roller mixer, slowly add the mixed aqueous solution to the roller while stirring In a type mixer, grind for 130 minutes to obtain a paste; then add 920g of water to the mixer, start the mixer, the stirring speed is 100r / min, the stirring blade is located at 30mm below the liquid surface, and then grind it well in step (3). The paste was slowly added in batches to the mixer, and the stirring time was 55 minutes to obtain a suspension solidifying agent...

Embodiment 2

[0024] Weigh 660 grams of magnesia powder and 1.2 grams of HPMC, add the two into the wheel-type mixer, start the machine and mix for 5 minutes, make the two fully mixed, obtain the mixed dry material, stop the machine; then weigh 430 grams of water , 16 grams of citric acid, 1.8 grams of defoamer, dissolve citric acid in water, then add defoamer and stir well to obtain a mixed aqueous solution; then start the roller mixer, slowly add the mixed aqueous solution to the roller while stirring In a type mixer, grind for 140 minutes to obtain a paste; then add 950g of water to the mixer, start the mixer, the stirring speed is 90r / min, the stirring blade is located at 28mm below the liquid surface, and then grind in step (3) The paste was slowly added in batches into a mixer, and the stirring time was 60 minutes to obtain a suspension solidifying agent for use.

[0025] Suspension performance index: According to JB / T5107-1991, using graduated cylinder measurement method, the suspens...

Embodiment 3

[0029] Weigh 640 grams of magnesia powder and 3.2 grams of HPMC, add the two into the wheel-type mixer, start the machine and mix for 10 minutes, make the two fully mixed, obtain the mixed dry material, and stop the machine; then weigh 450 grams of water , 14 grams of citric acid, 2.8 grams of defoamer, dissolve citric acid in water, then add defoamer and stir well to obtain a mixed aqueous solution; then start the roller mixer, slowly add the mixed aqueous solution to the roller while stirring In a type mixer, grind for 150 minutes to obtain a paste; then add 890g of water to the mixer, start the mixer, the stirring speed is 110r / min, the stirring blade is located at 25mm below the liquid surface, and then grind in step (3) The paste was slowly added in batches to the mixer, and the stirring time was 55 minutes to obtain a suspension solidifying agent for use.

[0030] Suspension performance index: According to JB / T5107-1991, using graduated cylinder measurement method, the s...

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Abstract

The invention provides a suspension curing agent for hardening of a phosphate binding agent with water as a carrier and a preparation method thereof. The suspension curing agent comprises the following components in percentage by weight: 31-33% of magnesia, 0.06-0.16% of HPMC, 0.7-0.85% of citric acid, 0.09-0.14% of defoaming agent, and 66-69% of water. The magnesia and the HPMC powder are weighed to put in a grinding wheel type mixing grinder for mixing and grinding; the citric acid, and the water and the defoaming agent being 30% of the total water quantity are weighed; the citric acid is dissolved in the water; the defoaming agent is added for uniformly mixing to obtain mixed water solution; the grinding wheel type mixing grinder is started for mixing and grinding the mixed water solution when the mixed water solution is added therein during stirring to obtain paste; the remained water is added in a stirrer; the stirrer is started; and the paste is slowly added in the stirrer for stirring in batches to obtain the suspension curing agent. The prepared suspension curing agent adopts water as the carrier, reaches the suspension rate of 100% by 2 hours, is not caked after more than 6 months of storage, and can be slightly shaken for use.

Description

technical field [0001] The invention belongs to the technical field of materials for manufacturing sand molds or sand cores in the field of foundry industry, and in particular relates to a suspension solidifying agent for phosphate binder hardening with water as a carrier and a preparation method thereof. Background technique [0002] Phosphate binder is a new type of harmless inorganic foundry binder material, which is used for forming bonded sand molds or sand cores. The binder is used together with the curing agent and mixed with refractory quartz sand for modeling and manufacturing. The core, the binder is solidified after a certain period of time under the action of the curing agent to have strength. The curing agent matched with the binder is a powdery material, magnesia powder. In actual use, the powdery material is not as convenient as the liquid state in terms of automatic quantification, transmission, and environmental protection. When mixing sand, it is easy to ca...

Claims

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Application Information

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IPC IPC(8): B22C1/16
CPCB22C1/16
Inventor 夏露张友寿晏骏玮黄晋龙威李四年
Owner HUBEI UNIV OF TECH
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