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Phosphate binder self-hardening sand curing agent and preparation method thereof

A curing agent and binder technology, applied in the field of molding materials, can solve problems such as poor strength stability, and achieve the effects of good performance, green storage, and stable storage.

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 currently used alkali metal curing agent has poor performance in terms of strength stability during storage.

Method used

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  • Phosphate binder self-hardening sand curing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Take a certain amount of metallurgical magnesia powder and crush it until the particle size is 1300-1600 mesh;

[0027] 2) Weigh 100g of crushed metallurgical magnesia powder, 15g of silica sol, 5g of coupling agent, 5g of urea, and 100g of water for subsequent use;

[0028] 3) Take 50g of water in 2) and add it to the mixing bucket, start the mixer, add urea, silica sol, and coupling agent into the mixing bucket respectively and stir, and at the same time slowly add the remaining 50g of water, continue stirring until it is uniform, and then set aside;

[0029] 4) Take the mixed solution in step 3) and slowly add it to the magnesia powder in 1), and stir while adding, until there is no obvious granular shape, and a suspension liquid mixture is obtained;

[0030] 5) Place the suspended liquid mixture in an oven for 6 hours at 100°C, then take it out and crush it until the particle size is 325-400 mesh;

[0031] 6) Weigh 1000g of raw sand, 25g of phosphate binder, and...

Embodiment 2

[0033] 1) Take a certain amount of metallurgical magnesia powder and crush it until the particle size is 1300-1600 mesh;

[0034] 2) Take by weighing 110g of crushed magnesia powder, 18g of silica sol, 3.5g of coupling agent, 7g of urea, and 105g of water for subsequent use;

[0035] 3) Take 50g of water in 2) and put it into the mixing bucket, start the mixer, add urea, silica sol, and coupling agent into the mixing bucket respectively and stir, and at the same time slowly add the remaining 60g of water, continue stirring until it is uniform, and then set aside;

[0036] 4) Take the mixed solution in step 3) and slowly add it to the magnesia powder in 1), and stir while adding, until there is no obvious granular shape, and a suspension liquid mixture is obtained;

[0037] 5) Place the suspended liquid mixture in an oven for 6 hours at 100°C, then take it out and crush it until the particle size is 325-400 mesh;

[0038] 6) Weigh 1000g of raw sand, 25g of phosphate binder, an...

Embodiment 3

[0040] 1) Take a certain amount of metallurgical magnesia powder and crush it until the particle size is 1300-1600 mesh;

[0041] 2) Weigh 120g of crushed magnesia powder, 20g of silica sol, 4.5g of coupling agent, 8g of urea, and 115g of water for subsequent use;

[0042] 3) Take 55g of water in 2) and put it into the mixing bucket, start the mixer, add urea, silica sol, and coupling agent into the mixing bucket respectively and stir, and at the same time slowly add the remaining 60g of water, continue stirring until uniform and then set aside;

[0043] 4) Take the mixed solution in step 3) and slowly add it to the magnesia powder in 1), and stir while adding, until there is no obvious granular shape, and a suspension liquid mixture is obtained;

[0044] 5) Place the suspended liquid mixture in an oven for 6 hours at 100°C, then take it out and crush it until the particle size is 325-400 mesh;

[0045] 6) Weigh 1000g of raw sand, 25g of phosphate binder, and 2.5g of curing a...

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Abstract

The invention discloses a phosphate binder self-hardening sand curing agent and a preparation method thereof. The curing agent comprises the following components of metallurgical magnesite powder, silica sol, water, a coupling agent and urea. The preparation method comprises the following steps that (1) metallurgical magnesia powder particles are crushed and refined; (2) the urea, the silica sol and the coupling agent are correspondingly added into water, and fully stirring is carried out to obtain a uniform mixed solution; (3) the mixed solution is slowly added into the metallurgical magnesiapowder, stirring is carried out while adding is carried out, so that a uniform suspension-shaped mixture is obtained; and (4) the mixture obtained in the step (3) is put into a drying oven at 100 DEGC for fully drying and dehydrating, then is taken out and crushed into fine powder. The using method comprises the following steps that firstly, the curing agent and raw sand are uniformly mixed andthen added with a phosphate binding agent for uniformly mixing, then sand discharging is carried out, the uniformly-mixed sand material is poured into a standard 8-typeface mold for sample preparation, and demoulding and storing are carried out after hardening. The phosphate binding agent self-hardening sand curing agent is simple in preparation process, and the prepared self-hardening sand is good in performance, stable in storage, green, environment-friendly and pollution-free.

Description

technical field [0001] The invention relates to the field of molding materials in the foundry industry, in particular to a phosphate binder self-setting sand curing agent and a preparation method thereof. Background technique [0002] With the increasingly stringent environmental protection supervision and the awakening of people's awareness of environmental protection, the environmental pollution caused by traditional organic resin binders cannot be ignored. The problem is not ideal in practical application. It is imminent to seek a new type of inorganic binder that can replace traditional organic resin sand. [0003] Phosphate binder is a green casting binder with low curing temperature, good heat resistance, small gas generation, good high-temperature collapsibility, good reusability, simple process and low cost. It is a very Modeling materials with application value and application prospect. At present, the curing methods of phosphate binder sand mainly include heat h...

Claims

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Application Information

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IPC IPC(8): B22C1/18
CPCB22C1/185
Inventor 夏露任彦臻叶锦瑞张友寿王性军刘志红张文博叶珏磊
Owner HUBEI UNIV OF TECH
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