Preparation method of anti-shrinkage high-refractoriness refractory mortar

A technology of refractoriness and refractory mud, which is applied in the field of preparation of shrinkage-resistant high refractoriness refractory mud, can solve the problems of low bond strength and refractoriness of clay refractory mud, fire and air leakage, and poor impermeability of molten metal, etc., to achieve improved High-temperature binder phase, the effect of preventing penetration and leakage

Inactive Publication Date: 2019-11-08
刘群艳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem that the present invention mainly solves is aimed at the clay quality refractory mud that present common refractory mud all adopts, and its Al 2 o 3 The content of silicon carbide is between 45% and 48%, while the content of silicon carbide is only 5% to 15%. During high temperature use, the shrinkage is large, causing a gap between the furnace body and the refractory material, causing fire and air leakage, and clay refractory mud sticking For the defects of low strength and refractoriness and poor impermeability to molten metal, a method for preparing refractory mud with high refractoriness and anti-shrinkage is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Preparation of self-made silicon carbide:

[0032] Weigh the river sand into a pulverizer and smash it through a 100-mesh sieve to obtain sieved river sand powder. Mix the sieved river sand powder with brown sugar and water at a mass ratio of 1:1:2, then put them into a beaker and stir. After mixing for 15 minutes, move it into an oven and dry to constant weight at 105°C to obtain a dried product;

[0033] Put the above-mentioned dried substance into a carbonization furnace, and carbonize it at 300°C for 1h under the protection of nitrogen to obtain a carbonized product. Move the carbonized product into a resistance furnace and heat it to 1500°C under the protection of argon, and then sinter at a high temperature for 4h;

[0034] After the above-mentioned sintering reaction is completed, the temperature is lowered to 800°C in an air atmosphere, and the high-temperature calcination is continued for 1 h. After the sintering is completed, the product is taken out, washed with hyd...

Embodiment 2

[0042] Preparation of self-made silicon carbide:

[0043] Weigh the river sand into a pulverizer and smash it through a 100-mesh sieve to obtain sieved river sand powder. Mix the sieved river sand powder with brown sugar and water at a mass ratio of 1:1:2, then put them into a beaker and stir. After mixing for 17 minutes, move it into an oven and dry to constant weight at 107°C to obtain a dried product;

[0044] Put the above-mentioned dry matter into a carbonization furnace, and carbonize it at 350°C for 1.5h under the protection of nitrogen to obtain a carbonized product. Move the carbonized product into a resistance furnace and heat it to 1550°C under the protection of argon. The high temperature sintering reaction is 5h;

[0045] After the above-mentioned sintering reaction is finished, the temperature is lowered to 850℃ under air atmosphere, and the high-temperature calcination is continued for 1.5h. After sintering, the product is taken out and washed with hydrofluoric acid an...

Embodiment 3

[0053] Preparation of self-made silicon carbide:

[0054] Weigh the river sand into a pulverizer and smash it through a 100-mesh sieve to obtain sieved river sand powder. Mix the sieved river sand powder with brown sugar and water at a mass ratio of 1:1:2, then put them into a beaker and stir. After mixing for 20 minutes, move it into an oven and dry to constant weight at 110°C to obtain a dried product;

[0055] Put the above-mentioned dried substance into a carbonization furnace, carbonize it at 400℃ for 2h under the protection of nitrogen to obtain a carbonized product, move the carbonized product into a resistance furnace, under the protection of argon, heat up to 1600℃, high temperature sintering reaction for 6h;

[0056] After the above-mentioned sintering reaction is completed, the temperature is lowered to 900°C in an air atmosphere, and the high-temperature calcination is continued for 2 hours. After the sintering is completed, the product is taken out, washed with hydrofluo...

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PUM

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Abstract

The invention discloses a preparation method of anti-shrinkage high-refractoriness refractory mortar, and belongs to the technical field of refractory material preparation. According to the preparation method of the anti-shrinkage high-refractoriness refractory mortar, first river sand is taken as a raw material, crushed and screened to obtain river sand powder, then the river sand powder and brown sugar water are mixed and dried to obtain a drying object, then the drying object is subjected to carbonization and high-temperature sintering to obtain silicon carbide, then oriental topaz and kyanite are mixed and subjected to ball-milling to obtain a mixed fine material, potassium carbonate, then zirconia and diammonium hydrogen phosphate are taken as raw materials, solid phase sintering is conducted to obtain zirconium phosphate potassium powder, finally the silicon carbide, the mixed fine material, zirconium phosphate potassium and strontium nitrate are taken as powder materials, phenolic resin and ethylene glycol are taken as binding agents to prepare the anti-shrinkage high-refractoriness refractory mortar.

Description

Technical field [0001] The invention discloses a preparation method of anti-shrinkage and high refractoriness refractory mud, which belongs to the technical field of refractory material preparation. Background technique [0002] Refractory clay is also called fire clay or joint material (powder-filled material). Used as a jointing material for refractory masonry. According to the material, it can be divided into clay, high alumina, siliceous and magnesia refractory mud. It is composed of refractory powder, binder and admixture. Almost all refractory raw materials can be made into powders used to prepare refractory mud. The ordinary refractory clay made of refractory clinker powder and an appropriate amount of plastic clay as a binder and plasticizer is called ordinary refractory clay, which has lower strength at room temperature, and higher strength is formed by ceramic bonding at high temperatures. The chemically bonded refractory clay, which uses hydraulic, air-hardened or ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
CPCC04B35/66C04B2235/3826C04B2235/443C04B2235/447
Inventor 刘群艳
Owner 刘群艳
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