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Wet process sintering production method for hercynite

The technology of an iron-aluminum spinel and a production method is applied in the field of refractory material production, which can solve the problems of high electricity cost, restrict product promotion and the like, and achieve the effects of low production cost, cost reduction and output improvement.

Inactive Publication Date: 2014-03-26
SANMENXIA XINYANGSHAO SYNTHETIC MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cost of electricity in this method is very high, which seriously restricts the promotion of products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The method for producing iron-aluminum spinel by wet sintering with industrial alumina primary aluminum and sponge iron powder as raw materials comprises the following steps:

[0025] a: Ingredients, Grinding: After batching 50% of γ-alumina primary aluminum (mass content of alumina ≥ 98%) and 50% of 120 mesh sponge iron powder (mass content of Fe ≥ 95%) according to mass percentage, add 1 % flake graphite, 0.1% polyvinyl alcohol (viscosity 15 mpa s) and water, ground in a wet ball mill, wherein the amount of flake graphite and polyvinyl alcohol is calculated based on the total mass of alumina and sponge iron powder Based on the basis, the water quality is 1.0 times the total mass of other materials; according to the particle fineness analysis of the materials in the mud, the slurry is ground for 15 hours, and the slurry particle size after grinding is 325 mesh and less than 1% (mass), which is obtained Mud A;

[0026] b: Pump the mud A into the filter press for dehydr...

Embodiment 2

[0031] Using calcined α-alumina and metal iron powder as raw materials, the method for wet sintering to produce iron-aluminum spinel comprises the following steps:

[0032] a: Batching and grinding: After batching 65% of α-alumina primary aluminum (mass content of alumina ≥ 98%) and 35% of 120 mesh metal iron powder (mass content of Fe ≥ 95%) according to mass percentage, add 5 % flake graphite, 0.3% polyvinyl alcohol (viscosity 30mpa s) and water are ground in a wet ball mill, wherein the flake graphite and polyvinyl alcohol are calculated based on the total mass of alumina and metal iron powder, Described water quality is 1.2 times of other materials total quality. According to the analysis of the particle fineness of the material in the mud, the slurry is ground for 15 hours and the slurry particle size after grinding is 325 mesh and less than 1% (mass), that is, the mud A is obtained;

[0033] b: Use a mud pump to pump material A into the filter press for dehydration, adj...

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Abstract

The invention belongs to the technical field of fire resistant material production, and particularly relates to a wet process sintering production method for hercynite. The wet process sintering production method comprises the following steps: compounding 50-65% of aluminium oxide and 35-50% of metallic iron powder according to weight percentage, adding graphite, polyvinyl alcohol and water, grinding so as to obtain mud A, and performing dehydrating, vacuum pugging, drying and sintering on the mud A so as to obtain the hercynite, wherein the dosage of the graphite and the polyvinyl alcohol is respectively 1-5% and 0.1-0.3% of the total mass of the aluminium oxide and the metallic iron powder, and the amount of water is 1.0-1.2 times of the total mass of the aluminium oxide, the metallic iron powder, the graphite and the polyvinyl alcohol. The wet process sintering production method is simple in technology, low in labor intensity, environment-friendly and low in cost, the obtained hercynite is uniform in components and high in volume density, and the crystalline phase content reaches 97%.

Description

technical field [0001] The invention belongs to the technical field of refractory production, and in particular relates to a wet sintering production method of iron-aluminum spinel. Background technique [0002] In the past, most of the refractory materials used in the sintering zone of dry process cement rotary kiln were magnesia-chrome bricks, but a small amount of Cr in the magnesia-chrome bricks after use 6+ It is a water-soluble carcinogenic ion that pollutes the environment. Cr in residual magnesia-chrome bricks after use in cement rotary kiln 6+ The content is about 0.1-0.5%, and its main harmful substance is K 2 CrO 4 , is a weakly oxidizing compound with high chemical stability. In many occasions, these Cr-containing 6+ Compounds will exist stably in nature and cause long-term pollution to the environment. In recent years, refractory workers are seeking new materials to replace magnesia-chrome bricks, so iron-aluminum spinel will be the development trend of ref...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 黄克忠周红军张东方
Owner SANMENXIA XINYANGSHAO SYNTHETIC MATERIALS
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