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Preparation of special plasticizer for unshaped refractory containing silica fume

A technology of refractory materials and plasticizers, applied in the field of refractory material admixtures, to achieve the effects of good fluidity, excellent high-temperature mechanical properties, and high water-reducing rate

Inactive Publication Date: 2011-01-19
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] After research, it was found that the domestic research on special plasticizers for amorphous refractory materials containing silica fume is still blank, and there is no related patent application in China.

Method used

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  • Preparation of special plasticizer for unshaped refractory containing silica fume
  • Preparation of special plasticizer for unshaped refractory containing silica fume

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 41.4g (0.2mol) of 2-acrylamide-2-methylpropanesulfonic acid, 14.4g (0.2mol) of acrylic acid, and 19.6g (0.2mol) of maleic anhydride, all dissolved in 200ml of water, and at the same time add 1.9 g of ammonium persulfate g (2.5%), mercaptoethanol 3.80g (5%), after stirring evenly, get 1 / 5 and join in the three-necked reaction flask, keep the temperature in the bottle at 70°C, open the stirrer, and feed N 2, reacted for about 30 minutes; the remaining 4 / 5 mixed solution was added dropwise within two hours. Raise the temperature to 90°C, add 0.5% initiator, react for another 4 hours, and lower the temperature. The product solution was dried by a rotary evaporator to obtain a light yellow powder. The fluidity of the refractory micropowder system containing silica fume was determined to be 150mm.

[0026] The main composition of the silica fume-containing monolithic refractory used to test the fluidity of the slurry is shown in the table below.

[0027]

Embodiment 2

[0029] Weigh 0.2 mol of sodium methacrylic acid, 0.5 mol of methacrylic acid, and 0.3 mol of itaconic anhydride and dissolve them in 200 ml of water, then add ammonium persulfate, which is 5.0% of the total weight of the monomer, and 2% of mercaptoethanol, and stir evenly Finally, take 1 / 5 and add it to the three-necked reaction bottle, keep the temperature in the bottle at 60°C, turn on the stirrer, and feed N 2 , reacted for about 30 minutes; the remaining 4 / 5 mixed solution was added dropwise within two hours. Raise the temperature to 80°C, add 0.5% initiator, react for another 6 hours, and lower the temperature. The sample solution was dried by a rotary evaporator to obtain a light yellow powder. The fluidity of the slurry containing silica fume refractory micropowder system was determined to be 140mm.

Embodiment 3

[0031] Take by weighing 0.2 mol of sodium propylene sulfonate, 1.0 mol of acrylic acid, 0.3 mol of itaconic acid, and 0.6 mol of maleic anhydride are all dissolved in 200 ml of water, then add ammonium persulfate weight to be 9% of the total monomer weight, 10% of mercaptoethanol, After stirring evenly, take 1 / 5 and add it to the three-necked reaction bottle, keep the temperature in the bottle at 80°C, turn on the stirrer, and feed N 2 , reacted for about 30 minutes; the remaining 4 / 5 mixed solution was added dropwise within two hours. Raise the temperature to 90°C, add 0.5% initiator, react for another 2 hours, and lower the temperature. The sample solution was dried by a rotary evaporator to obtain a light yellow powder. The fluidity of the slurry containing silica fume refractory micropowder system was determined to be 130mm.

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Abstract

The invention belongs to the technical field of refractory material additives, and in particular relates to a preparation method for an amorphous refractory material special plasticizer containing silicon ash. The preparation method comprises the following concrete steps: carrying out the free radical copolymerization reaction of unsaturated double bond-contained monomers respectively with carboxy groups, sulfonic groups and anhydride groups, adding 2 to 10 percent of mercaptoethanol molecular weight regulator and 2 to 10 percent of initiator, and setting the mol ratio of the sulfonic groups to the carboxy groups to the anhydride groups in the synthesis product molecule to be 1: 1 to 5: 1 to 3. The synthesized plasticizer overcomes the inadaptability of a comb-type polyocarboxy acid plasticizer in a micropowder system containing the silicon ash, and matches the action of the silicon ash to remarkably improve the fluidity and high temperature mechanical properties of the amorphous refractory material containing the silicon ash.

Description

technical field [0001] The invention belongs to the technical field of admixtures for refractory materials, and in particular relates to a method for preparing a special plasticizer for amorphous refractory materials containing silica fume. Background technique [0002] In recent years, due to the use of high-quality and high-performance raw materials including binders, the application of ultra-fine powder and dispersion technology, the introduction of high-efficiency additives, and the optimization of the full range of particle size distribution, some non-oxides have been introduced to make oxides-non-oxidized The development of monolithic refractory materials in terms of material, variety, performance, construction and application is very active. [0003] Unshaped refractory materials require binders to have dispersibility and lubricity for refractory particles, and at the same time, hardening strength is required in the sense of maintaining the filling structure. Moreove...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/06C08F220/04C08F220/58C04B35/634C04B35/66
Inventor 高群王国建
Owner TONGJI UNIV