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A kind of refractory material for liquid line furnace wall and liquid outlet nozzle of non-ferrous smelting melting furnace and its preparation method

A technology of refractory material and liquid outlet, which is applied in the field of refractory materials, can solve the problems of increasing the viscosity of slag, reducing the high temperature performance of refractory materials, destroying the structure of refractory materials, etc., so as to reduce decomposition reaction, ensure thermal shock stability, avoid Density and slag resistance reduction effect

Active Publication Date: 2021-08-24
REFRACTORY MATERIAL OF SINOSTEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purpose of using nano-alumina is to reduce the porosity and reduce the pore size, so as to reduce the penetration and reaction of solution and slag on refractory materials, but nano-alumina is easy to react with slag to form FeO-Al 2 o 3 Spinel increases the viscosity of slag and accumulates unevenly in the refractory material, destroying the structure of the refractory material and gradually reducing the high temperature performance of the refractory material

Method used

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  • A kind of refractory material for liquid line furnace wall and liquid outlet nozzle of non-ferrous smelting melting furnace and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0030] Composition of 50 parts of Al-Cr eutectic, 20 parts of Fe-Cr spinel, 4 parts of Magnesium-Chromium spinel and 30 parts of Fe-Al spinel according to particle size, according to the principle of first coarse and then fine, first dry in wet mill Mix, after the granules and fine powder are mixed evenly, add 3 parts of gel binder mixed with α-alumina micro-powder and aluminum dihydrogen phosphate solution with a mass ratio of 3:7, press with a pressure of 1000T, and shape it into bricks. Put it in a desiccator and dry it at 140°C for 24 hours, then put the dried bricks in a high-temperature tunnel kiln for firing at a firing temperature of 1600°C, and hold for 8 hours at the firing temperature .

Embodiment 2

[0032] 60 parts of aluminum-chromium eutectic, 10 parts of iron-chromium spinel, 7 parts of magnesium-chromium spinel and 20 parts of iron-aluminum spinel are composed according to the particle size. According to the principle of first coarse and then fine, first dry in the wet mill After mixing the granules and fine powder evenly, add 6 parts of α-alumina micro-powder with a mass ratio of 4:5 and aluminum dihydrogen phosphate solution to form a gel binder, press with a pressure of 1200T, and shape it into bricks. Place in a desiccator and dry for 24 hours at a temperature of 140°C, then place the dried bricks in a high-temperature tunnel kiln for firing at a firing temperature of 1550°C, and hold for 7 hours at the firing temperature .

Embodiment 3

[0034] 54 parts of aluminum-chromium eutectic, 16 parts of iron-chromium spinel, 5 parts of magnesium-chromium spinel and 26 parts of iron-aluminum spinel are composed according to particle size. Mix, after the granules and fine powder are mixed evenly, add 4 parts of gel binder mixed with α-alumina micro-powder and aluminum dihydrogen phosphate solution with a mass ratio of 5:7, press with a pressure of 1100T, and shape it into bricks. Place in a desiccator and dry at 100°C for 24 hours, then place the dried bricks in a high-temperature tunnel kiln for firing at a firing temperature of 1600°C, and hold for 6 hours at the firing temperature .

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Abstract

A refractory material for the liquid line furnace wall and the liquid outlet part of the nonferrous smelting melting furnace, which is suitable for the liquid line furnace wall and the liquid outlet part of the nonferrous smelting melting furnace. The composition of the refractory material is: aluminum chromium eutectic , iron-chromium spinel, magnesium-chromium spinel, iron-aluminum spinel and gel binder. This technical scheme uses aluminum-chromium eutectic, iron-chromium spinel, magnesia-chromium spinel and iron-aluminum spinel as raw materials in a small number of parts by weight, which reduces the content of MgO, so that the refractory materials about MgO The dissolution and subsequent decomposition reactions are greatly reduced, avoiding the refractory structure being melted and damaged by frequent reactions. Aluminum dihydrogen phosphate solution and α-alumina micropowder are used as binders, so that various raw materials and binders can penetrate each other, which not only fills part of the intergranular gaps, but also retains part of the intergranular cracks, making the refractory more compact and avoiding the slag in While rapidly accumulating in refractory materials, it has better thermal shock stability.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a refractory material for the liquid line furnace wall and liquid outlet nozzle 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/00C22C1/05F27D1/00
Inventor 张利新刘萍杨建华邓俊杰王玉霞张小惠
Owner REFRACTORY MATERIAL OF SINOSTEEL CORP
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