Gel injection molding and forming technology of specific zircon brick

A technology of gel injection molding and zircon bricks, which is applied in the field of refractory materials, can solve the problems of dry cracking and poor high-temperature performance of the formed body, and achieve the effect of low cost, high strength and few defects

Inactive Publication Date: 2010-06-23
ZHENGZHOU DONGFANG SANLI REFRACTORY MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is the problems of poor high-temperature performance, dry cracking, and high-temperature shrinkage of the formed body existing in t

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The gel injection molding process of special zircon bricks is as follows:

[0018] (1) Preparation of premix

[0019] Add 85 parts by weight of water, 10 parts by weight of acrylamide, 1.5 parts by weight of N-N' methylenebisacrylamide, 2 parts by weight of polyethylene glycol, and 0.5 parts by weight of ammonium citrate into a mixer, and stir until completely dissolved, then add ammonia water to adjust its pH value to 8 to make a premix;

[0020] (2) Preparation of slurry

[0021] Adding 50 parts by weight of zircon fine powder and 30 parts by weight of the premixed solution into a ball mill and milling for 3 hours to obtain a slurry with a zircon stone solid phase volume fraction > 56% and a viscosity < 800 mPa·s;

[0022] (3) Gel injection molding

[0023] Put the slurry into a mixer, add catalyst N, N, N', N'-tetramethylethylenediamine saturated solution and initiator ammonium persulfate saturated solution, the amount of catalyst added is 1% of the quality of zir...

Embodiment 2

[0025] The gel injection molding process of special zircon bricks is as follows:

[0026] (1) Preparation of premix

[0027] Add 88 parts by weight of water, 9 parts by weight of acrylamide, 1.0 parts by weight of N-N' methylenebisacrylamide, 3 parts by weight of polyethylene glycol, and 1 part by weight of ammonium citrate into a mixer, and stir until completely dissolved, then add ammonia water to adjust its pH value to 8.5 to make a premix;

[0028] (2) Preparation of slurry

[0029] Adding 60 parts by weight of zircon fine powder and 40 parts by weight of the premixed solution into a ball mill, and ball milling for 4 hours to obtain a slurry with a zircon stone solid phase volume fraction > 56% and a viscosity < 800 mPa·s;

[0030] (3) Gel injection molding

[0031] Put the slurry into a mixer, add catalyst N, N, N', N'-tetramethylethylenediamine saturated solution and initiator ammonium persulfate saturated solution, the amount of catalyst added is 2% of the quality of...

Embodiment 3

[0033] The gel injection molding process of special zircon bricks is as follows:

[0034] (1) Preparation of premix

[0035] Add 92 parts by weight of water, 12 parts by weight of acrylamide, 0.5 parts by weight of N-N' methylenebisacrylamide, 1 part by weight of polyethylene glycol, and 1.5 parts by weight of ammonium citrate into a mixer, and stir until completely dissolved, then add ammonia water to adjust its pH value to between 9 to make a premix;

[0036] (2) Preparation of slurry

[0037] Adding 70 parts by weight of zircon fine powder and 20 parts by weight of the premixed solution into a ball mill, and ball milling for 5 hours to obtain a slurry with a zircon solid phase volume fraction > 56% and a viscosity < 800 mPa·s;

[0038] (3) Gel injection molding

[0039] Put the slurry into a mixer, add catalyst N, N, N', N'-tetramethylethylenediamine saturated solution and initiator ammonium persulfate saturated solution, the amount of catalyst added is 1.5% of the quali...

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PUM

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Abstract

The invention discloses a gel injection molding and forming technology of a specific zircon brick, which comprises working procedures of sizing preparation, gel injection molding, curing, demolding and drying, particularly comprises the flowing steps: adding an organic monomer of acrylamide, a cross-linking agent of N-N' methylene-bisacrylamide, a water-soluble plasticizer of polyethylene glycol and a dispersing agent of ammonium citrate into water and stirring to be completely dissolved; then adding ammonia water and adjusting the pH value of the ammonia water and obtaining premixed solution; adding zircon superfine power into the premixed solution to obtain sizing; adding a catalyst of tetramethyl ethylene diamine solution and an initiator of ammonium persulfate solution, evenly stirring and injecting a plaster mold; and carrying out curing, demolding and drying to obtain a specific zircon brick blank. The invention has t simple operation and low cost; the relative density of the prepared blank can reach 55-70 percent; and the invention has the advantages of high strength, few defects, accessible clear dimension molding and the like.

Description

technical field [0001] The invention belongs to the field of refractory materials, and in particular relates to a gel injection molding process for special-type zircon bricks. Background technique [0002] At present, the demand for high-quality special-shaped zircon bricks in glass, metallurgy, petroleum, chemical and other industries is increasing, but it is difficult for refractory manufacturers to meet the requirements of users, mainly due to the limitation of molding methods. Traditional machine press molding, vibration molding, pouring molding and other methods have their limitations. Machine press molding is only suitable for the production of products with simple shapes. Vibration molding is difficult to ensure the uniformity of product density. Casting molding needs to add silica fume , cement and other inorganic materials seriously affect the high-temperature performance of the product, and the low solid content of the casting molding will lead to problems such as ...

Claims

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Application Information

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IPC IPC(8): B28B1/00B28C7/04B28C1/14
Inventor 陈建强张富强管军红吕国营
Owner ZHENGZHOU DONGFANG SANLI REFRACTORY MATERIALS
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