Method of producing forsterite refractory

A refractory material, forsterite technology, applied in the field of forsterite refractory production, can solve the problems of dust pollution, land occupation, the above-mentioned substances are easy to float in the air, etc., and achieve the effect of reducing pollution and production costs

Inactive Publication Date: 2009-10-28
海城华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

[0004] With the continuous development of industry, the amount of tailings and magnesite shaft kiln dust removal powder from the above magnesite flotation is increasing. The current treatment method is mainly stacking, which not only occupies a large amount of land, but also the above materials are easy to float. In the air, causing dust pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take 20 kg of magnesite flotation tailings with a particle size of ≤0.15mm, 40 kg of light-burned magnesium powder with a particle size of ≤0.074mm, and 40 kg of silica powder with a particle size of ≤0.074mm, mix them evenly in a mixer, and measure the mixture Medium weight ratio MgO / SiO 2 =1.126, add 9.4 kg of lightly burned magnesium powder, and then measure MgO / SiO 2 = 1.342, then add 20 kg of combustible sawdust with a particle size of ≤0.5mm and mix evenly, add 40 kg of water and mix evenly to make adobe. Dry the obtained adobe at 15-30°C for more than 24 hours, then dry at 110°C for 12 hours, sinter in an oxidizing atmosphere, first keep it at 500°C-650°C for 3 hours, and then keep it at 1500°C After 3 hours, a bulk density of 0.9g / cm can be obtained 3 , A light-weight insulating forsterite refractory material with an apparent porosity of 64%.

Embodiment 2

[0024] Take 60 kg of magnesite flotation tailings with a particle size of ≤0.15mm, 30 kg of light-burned magnesium powder with a particle size of ≤0.074mm, and 10 kg of silica powder with a particle size of ≤0.074mm, mix them evenly in a mixer, and measure the mixture Medium weight ratio MgO / SiO 2 =3.213, add 10.1 kg of silica powder, and then measure MgO / SiO 2 = 1.476, then add 20 kg of incinerable polylight balls with particle diameter≤0.5mm and mix evenly, then add 35 kg of water and mix evenly to make adobe. Dry the obtained adobe at 15-30°C for more than 24 hours, then dry at 110°C for 12 hours, sinter in an oxidizing atmosphere, first keep it at 500°C-650°C for 3 hours, and then keep it at 1500°C After 3 hours, a bulk density of 0.78g / cm can be obtained 3 , A light-weight insulating forsterite refractory material with an apparent porosity of 74%.

Embodiment 3

[0026] Take 40 kg of magnesite flotation tailings with a particle size of ≤0.15mm, 25 kg of light-burned magnesium powder with a particle size of ≤0.074mm, and 35 kg of silica powder with a particle size of ≤0.074mm, mix them evenly in a mixer, and measure the mixture Medium weight ratio MgO / SiO 2 =1.045, then add 14.8 kg of lightly burned magnesium powder, and then measure MgO / SiO 2 = 1.410, then add 15 kg of incinerable polylight balls with particle diameter ≤ 0.5mm, 5 kg of coal powder and mix evenly, then add 37 kg of water and mix evenly to make adobe. Dry the obtained adobe at 15-30°C for more than 24 hours, then dry at 110°C for 12 hours, sinter in an oxidizing atmosphere, first keep it at 500°C-650°C for 3 hours, and then keep it at 1500°C After 5 hours, a bulk density of 0.85g / cm can be obtained 3 , A light-weight insulating forsterite refractory material with an apparent porosity of 70%.

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Abstract

A method for producing forsterite refractory is characterized by comprising: a. mixing the raw magnesite flotation tailing or magnesite shaft kiln dust removing powder, light burning magnesite powder and cabosil, wherein the weight ratio Mgo / SiO[2] is 1.342-1.476; b. according to the weight ratio, uniformly mixing 80-100 portions of mixed materials obtained in step a and 0-20 portions of burnable lost property, additionally with 30-70 portions of water, producing briquette; drying the briquette obtained in step b at 15-50 DEG C for 3-24 hours, drying at 110 DEG C for 12 hours, burning at the oxidative atmosphere; keeping warm at 500-650 DEG C for 2-3 hours, 1500 DEG C for 3-5 hours. The invention uses the industrial waste to produce the forsterite refractory, greatly reduces the production cost of the forsterite refractory, decreases the dust pollution and improves the ecologic environment.

Description

technical field [0001] The invention relates to a method for producing refractory materials, in particular to a method for producing forsterite refractory materials. Background technique [0002] The tailings of magnesite flotation are: after the magnesite ore is mined, it is processed and flotation to get high impurity content, especially the ore with high silicon dioxide content. Generally, such tailings are regarded as waste throw away. [0003] The magnesite shaft kiln dust removal powder is: after the magnesite ore is mined, it is calcined into various grades of magnesite in the shaft kiln, and the dust contained in the smoke exhaust system during the calcination and smoke exhaust process. [0004] With the continuous development of industry, the amount of tailings and magnesite shaft kiln dust removal powder from the above magnesite flotation is increasing. The current treatment method is mainly stacking, which not only occupies a large amount of land, but also the ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 李广达张永禄
Owner 海城华宇耐火材料有限公司
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