Preparation method of plasticizing agent with thixotropy for unshaped refractory

A technology of refractory material and plasticizer, which is applied in the field of refractory material admixture to achieve the effects of good fluidity, excellent high temperature mechanical properties and high thixotropy

Inactive Publication Date: 2010-11-17
SHANGHAI RUILI METALLURGY FURNACE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] After searching, it is known that the domestic research on thixotropic plasticizers for amorphous refractory materials containing silica fume is still blank.

Method used

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  • Preparation method of plasticizing agent with thixotropy for unshaped refractory
  • Preparation method of plasticizing agent with thixotropy for unshaped refractory
  • Preparation method of plasticizing agent with thixotropy for unshaped refractory

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 add 1.9 g of ammonium persulfate at the same time 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, lower the temperature, neutralize the pH value to 9-10 with NaOH, and then spray dry to obtain a light yellow powder. The fluidity of the refractory micropowder system containing silica fume is determined to be 150mm (vibration).

[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.

[00...

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, and react for another 6 hours. After cooling down, use NaOH to neutralize the pH value to 9-10, and then spray dry to obtain a light yellow powder. The fluidity of the clean slurry of the silica fume-containing refractory micropowder system is measured to be 140mm (vibration).

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 70°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, and react for another 2 hours. The temperature is lowered with NaOH to neutralize the pH value to 9-10, and then spray-dried to obtain a light yellow powder. The fluidity of the clean slurry of the silica fume-containing refractory micropowder system is measured to be 130 mm (vibration).

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Abstract

The invention relates to a preparation method of plasticizing agent with thixotropy special for siliceous dust containing unshaped refractory. The method includes the concrete steps that: unsaturated double bond containing monomers respectively provided with carboxyl group, sulphonic acid group and anhydride group are subject to free radical copolymerization in aqueous solution at 60-90 DEG C, molecular weight regulators 2-10% of mercaptoethanol and 2-10% of initiator are added, and the mol ratio of sulphonic acid group, carboxyl group and anhydride group in synthesized product molecule is 1: 1-5: 1-3; and pH value of solution is regulated to 9-10, and then spray drying is carried out. The synthesized plasticizing agent overcomes the inadaptability of comb-type polycarboxylic acid in siliceous dust containing micro powder system, can be mutually matched with the action of siliceous dust, can obviously improve the fluidity and thixotropy of siliceous dust containing unshaped refractory and is applicable to ramming refractories.

Description

technical field [0001] The invention relates to a preparation method of a plasticizer for amorphous refractory materials containing silica fume with thixotropy. The invention belongs to the technical field of refractory material additives. 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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IPC IPC(8): C08F220/06C08F220/58C08F222/02
Inventor 高群赵玲娣杨玲王礼玮
Owner SHANGHAI RUILI METALLURGY FURNACE MATERIAL
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