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A kind of refractory material for the secondary working layer of non-ferrous smelting melting furnace and its preparation method

A refractory material and working layer technology, applied in the field of refractory materials, can solve problems such as uneven temperature distribution of the furnace body and large temperature fluctuations in the secondary working layer, and achieve long service life, avoid rapid accumulation, and avoid repairing effects

Active Publication Date: 2021-08-27
REFRACTORY MATERIAL OF SINOSTEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The traditional non-ferrous smelting melting furnace does not propose the concept of a secondary working layer. In the present invention, the secondary working layer is wrapped outside the working layer of the furnace body, and the temperature distribution of the furnace body is uneven. The temperature of the furnace body is also different at different times. Overall, , the temperature of the sub-working layer fluctuates greatly

Method used

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  • A kind of refractory material for the secondary working layer of non-ferrous smelting melting furnace and its preparation method

Examples

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Effect test

Embodiment 1

[0018] 90 parts of fused chromium corundum and 5 parts of chromium oxide are composed according to the particle size. According to the principle of first coarseness and then fineness, first dry mix in a wet mill, and after the particles and fine powder are mixed evenly, add 5 parts with a mass ratio of 3:7 The gel binder mixed with α-alumina micropowder and aluminum dihydrogen phosphate solution is pressed at a pressure of 400T to form a brick, and the resulting brick is placed in a dryer and dried at a temperature of 100-150°C for 24 hours, and then The dried bricks are fired in a high-temperature tunnel kiln at a firing temperature of 1300°C, and the holding time is 8 hours under the firing temperature condition.

Embodiment 2

[0020] 92 parts of fused chromium corundum and 6 parts of chromium oxide are composed according to the particle size. According to the principle of first coarseness and then fineness, first dry mix in a wet mill, and after the particles and fine powder are mixed evenly, add 5 parts with a mass ratio of 4:5 The gel binder mixed with α-alumina micropowder and aluminum dihydrogen phosphate solution is pressed at a pressure of 480T to form a brick, and the resulting brick is placed in a dryer and dried at a temperature of 100-150°C for 24 hours, and then The dried bricks are fired in a high-temperature tunnel kiln at a firing temperature of 1300°C, and the holding time is 8 hours under the firing temperature condition.

Embodiment 3

[0022] 94 parts of fused chromium corundum and 7 parts of chromium oxide are composed according to the particle size. According to the principle of first coarse and then fine, first dry mix in a wet mill, and after the particles and fine powder are mixed evenly, add 5.5 parts. The mass ratio is 5: 7 The gel binder mixed with α-alumina micropowder and aluminum dihydrogen phosphate solution is pressed at a pressure of 500T to form brick adobe, and the obtained brick adobe is placed in a dryer and dried at a temperature of 100-150°C for 24 hours, and then The dried bricks are fired in a high-temperature tunnel kiln at a firing temperature of 1300°C, and the holding time is 8 hours under the firing temperature condition.

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Abstract

A refractory material for the sub-working layer of a non-ferrous smelting melting furnace is suitable for the position of the sub-working layer of a non-ferrous smelting melting furnace. The refractory material is composed of fused chromium corundum, chromium oxide and a binder. The present invention uses fused chromium corundum and chromium oxide as raw materials, and α-alumina micropowder and aluminum dihydrogen phosphate solution as binders. Since the combination of phosphoric acid solution, aluminum dihydrogen phosphate solution and raw materials is a chemical combination, the chemical stability is better The addition of clay makes part of the raw materials melt together with the clay during firing to fill larger intergranular gaps, making the raw materials have good thermal shock stability, erosion resistance and permeability resistance.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a refractory material for the secondary working layer of a non-ferrous smelting melting furnace. Background technique [0002] my country is a big producer of non-ferrous metals. With the rapid development of my country's transportation, energy, construction, electromechanical, communications, automobiles, household appliances, etc. and my country's neighboring countries such as Japan and South Korea, resource-poor countries need to import a large amount of non-ferrous metals, various types Composite materials, alloys, ultra-thin copper plates, pipes and chemical products have a wide range of domestic and foreign markets, and the production capacity continues to expand, resulting in a series of problems such as: aging technology, outdated equipment, high energy consumption, high cost, serious environmental pollution, Problems such as shortage of mine resources and low ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/105C04B35/66C04B35/63C04B35/622
CPCC04B35/105C04B35/622C04B35/6303C04B35/6309C04B2235/3241C04B2235/77C04B2235/96
Inventor 张利新李婉婉廖绍虎张全立张文天张小惠
Owner REFRACTORY MATERIAL OF SINOSTEEL CORP
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