Phosphorus-free plastic refractory for casting and preparation method thereof

A plastic, mass percentage technology, applied in the field of cast steel and cast iron smelting, can solve the problems of low construction blank strength, hazards of molten iron and molten steel, short storage life, etc., achieve excellent high temperature volume stability, avoid pollution and damage, The effect of improving thermal conductivity

Active Publication Date: 2022-03-15
ZHENJIANG SINO FOUNDRY REFRACTORY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a phosphorus-free plastic for casting and its preparation method, which solves the problem of harm and pollution to molten iron and molten steel during the use of phosphorus-containing plastics on the market; During the use of plastics, there are problems such as low construction body strength, easy cracking during use, and short storage life. It has the advantages of excellent construction, long storage life, and good high-temperature strength.

Method used

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  • Phosphorus-free plastic refractory for casting and preparation method thereof
  • Phosphorus-free plastic refractory for casting and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Example 1: A phosphorus-free plastic for casting and its preparation method

[0045] A phosphorus-free plastic for casting, calculated according to weight percentage, including the following: high-purity calcined tabular corundum 69%, high-purity low-sodium α-Al 2 o 3 11% fine powder, 6% fused cast zirconia corundum fine powder, 5% aluminum sulfate powder, 1.5% sodium silicate powder, 3% metallurgical coke powder, 3% 97% silicon fine powder and 1.5% metallic aluminum powder.

[0046] A preparation method of phosphorus-free plastic for casting, the method is as follows:

[0047] S1. Prepare high-purity calcined tabular alumina and high-purity low-sodium α-Al 2 o 3 Micropowder, fused cast zirconia corundum powder, aluminum sulfate powder, sodium silicate powder, metallurgical coke powder, 97% silicon micropowder, metal aluminum powder;

[0048] S2. High-purity calcined platy corundum raw material (0.045-1mm), high-purity and low-sodium α-Al 2 o 3 Add micropowder, fu...

Embodiment 2

[0051] Embodiment 2: A phosphorus-free plastic for casting, calculated according to weight percentage, including the following: 69% of high-purity calcined platy corundum, high-purity and low-sodium α-Al 2 o 3 12% fine powder, 7% fused cast zirconium corundum fine powder, 3% aluminum sulfate powder, 1.68% sodium silicate powder, 3% metallurgical coke powder, 3% 97% silicon fine powder and 1.32% metallic aluminum powder;

[0052] High-purity and low-sodium α-Al 2 o 3 Al in micropowder 2 o 3 The content is 99.8%, the sodium oxide content is less than 0.10%, and the particle size is 1.8-2.5μm; fused-cast zirconium corundum powder ZrO 2 The content is 31.5%, Al 2 o 3 content of 46.5%, SiO 2 ≤20.0%; Particle size ≥0.075mm; SiO in sodium silicate powder 2 The content is 65.0%, Na 2 The O content is 34.5%, and the modulus is 2.10.

[0053] According to the formula Calculate the addition of sodium silicate powder to be: 1.68%.

[0054] Wherein, w is the mass percent of so...

Embodiment 3

[0063] Embodiment 3: A phosphorus-free plastic for casting, calculated according to weight percentage, including the following: 70% high-purity calcined platy corundum, high-purity low-sodium α-Al 2 o 3 11% fine powder, 7% fused cast zirconia corundum powder, 3.3% aluminum sulfate powder, 1.20% sodium silicate powder, 3% metallurgical coke powder, 3% 97% silicon fine powder, and 1.5% metal aluminum powder.

[0064] High-purity and low-sodium α-Al 2 o 3 Al in micropowder 2 o 3 The content is 99.8%, the sodium oxide content is less than 0.10%, and the particle size is 1.8-2.5μm; fused-cast zirconium corundum powder ZrO 2 The content is 31.5%, Al 2 o 3 content of 46.5%, SiO 2 ≤20.0%; particle size ≥0.075mm; SiO in sodium silicate powder 2 The content is 65.0%, Na 2 The O content is 34.5%, and the modulus is 2.10.

[0065] According to the formula Calculate the addition of sodium silicate as 1.20%;

[0066] where T 1 is 1200°C, T 2 It is the maximum heating temperat...

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Abstract

The invention belongs to the technical field of cast steel and cast iron smelting, and particularly relates to a phosphorus-free plastic refractory for casting and a preparation method thereof. According to the technical key points, the ceramic comprises the following chemical components in percentage by mass: 78%-88% of Al2O3, 6%-10% of SiO2, 2%-4% of ZrO2 and 2%-3% of C. According to the phosphorus-free plastic refractory for casting and the preparation method of the phosphorus-free plastic refractory, provided by the invention, the problems of harm and pollution to molten iron and molten steel in the using process of the phosphorus-containing plastic refractory in the current market are solved; meanwhile, the problems of low construction green body strength, easiness in cracking during use, short storage life and the like of the plastic material combined by other binding agents in the use process are solved, and the plastic material has the advantages of excellent construction, long storage life, good high-temperature strength and the like.

Description

technical field [0001] The invention belongs to the technical field of cast steel and cast iron smelting, and in particular relates to a phosphorus-free plastic for casting and a preparation method thereof. Background technique [0002] Compared with other monolithic refractories, plastics have the advantages of good thermal shock resistance, strong peeling resistance, excellent corrosion resistance, high temperature strength, low thermal conductivity, and flexible construction methods. It is widely used in the field of metal smelting. [0003] At present, plastics on the market can be divided into phosphoric acid plastics, phosphate plastics, water glass plastics, etc. according to the type of binder. Among them, plastics combined with phosphoric acid and phosphate have higher strength indicators, but the content of iron oxide in plastic raw materials is relatively high. Phosphoric acid and phosphate are easy to chemically react with iron oxide, which greatly shortens the ...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/10
CPCC04B35/66C04B35/10C04B2235/3222C04B2235/3427C04B2235/448C04B2235/422C04B2235/428C04B2235/402C04B2235/5427C04B2235/96Y02P10/20
Inventor 刘小团何胜平
Owner ZHENJIANG SINO FOUNDRY REFRACTORY
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