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Novel acid furnace lining refractory material

A technology of acidic lining and refractory materials, which is applied in the field of acidic refractory lining materials for induction furnaces. It can solve the problems of large volume expansion and easy formation of cracks, and achieve the effects of improving compactness, prolonging service life, and improving volume density.

Inactive Publication Date: 2010-06-09
长沙环宇耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a new type of acidic lining refractory for the shortcomings of the traditional acidic lining refractory, such as large volume expansion, easy formation of cracks, and certain destructiveness to melting equipment.

Method used

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  • Novel acid furnace lining refractory material
  • Novel acid furnace lining refractory material
  • Novel acid furnace lining refractory material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Coarse crystalline quartz sand is selected as the raw material, and the mass percentage of each raw material is: 3-5mm high-purity microcrystalline quartz sand 21%; 1-2mm high-purity microcrystalline quartz sand 30%; 0-1mm semi-sintered microcrystalline quartz sand 22%; 325 mesh semi-sintered microcrystalline quartz sand 26%; boric anhydride (B 2 o 3 ) is 1%; special sintering agent XO is 0.05%. It is made through mineral processing, coarse crushing, material washing, fine crushing, sieving, testing, drying, testing, batching, mixing, testing, packaging and other steps.

[0018] After testing, the product of the present invention is compared with the main performance of the product of JUNKER company in Germany as follows:

[0019]

[0020]

[0021] The above test data show that the thermal expansion (1000° C.) of the product of the present invention is lower than that of similar products of JUNKER, Germany, so the volume expansion produced in the use process dec...

Embodiment 2

[0023] Coarse crystalline quartz sand is selected as the raw material, and the mass percentage of each raw material is: 3-5mm high-purity microcrystalline quartz sand 20%; 1-2mm high-purity microcrystalline quartz sand 30%; 0-1mm semi-sintered microcrystalline quartz sand 23%; 325 mesh semi-sintered microcrystalline quartz sand 26%; boric anhydride (B 2 o 3 ) is 1%; special sintering agent XO is 0.04%. It is made through mineral processing, coarse crushing, material washing, fine crushing, sieving, testing, drying, testing, batching, mixing, testing, packaging and other steps.

[0024] After testing, the product of the present invention is compared with the main performance of the product of JUNKER company in Germany as follows:

[0025]

[0026]

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Abstract

The invention discloses a novel acid furnace lining refractory material. The novel acid furnace lining refractory material comprises the following raw materials in percentage by weight: 19 to 23 percent of 3 to 5mm high-purity microcrystal quartz sand, 28 to 32 percent of 1 to 2mm high-purity microcrystal quartz sand, 20 to 24 percent of 0 to 1mm semi-sintered microcrystal quartz sand, 24 to 28 percent of 325-mesh semi-sintered microcrystal quartz sand, 0.8 to 1.1 percent of B2O3 and 0.04 to 0.06 percent of special sintering flux. In the novel acid furnace lining refractory material, pre-sintered semi-sintered microcrystal quartz sand powder with stable volume and low thermal expansion is used as the raw material, and the special sintering flux is added so as to form a solid solution structure at a high temperature, so the volume expansion generated in the use process of a furnace lining is remarkably reduced, the furnace lining is prevented from forming cracks easily and the service life of the furnace lining is greatly prolonged.

Description

technical field [0001] The invention relates to an acid refractory lining material for an induction electric furnace, in particular to a quartz-based induction electric furnace lining refractory material. Background technique [0002] Coreless induction furnace is a kind of melting equipment with rapid development and wide application at present. It is widely used in the casting production of steel, iron and non-ferrous alloys. How to improve the service life of the induction furnace lining is a common concern in the foundry industry. The factor that affects the life of the electric furnace is a systematic project. It includes the performance of the lining material, the technical quality of the operator, the furnace building tools, the oven process, the cleaning of the furnace charge, etc., but the performance of the lining material is the primary factor affecting the life of the lining, including the bulk density of the lining material and the added sintering agent. , moi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 张建奇
Owner 长沙环宇耐火材料有限公司
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