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Wet production process of sintered brown fused alumina

A production process and wet process technology, which is applied in the field of wet process production of sintered brown corundum, can solve the problems of increased raw material cost, waste of high bauxite resources, unreasonable use of aluminum ore resources, etc., to solve the problem of large quality fluctuations , Improve the working environment and promote the uniform distribution of raw materials

Inactive Publication Date: 2019-12-06
遵义兴正业矿业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, it not only leads to an increase in the cost of raw materials, but also prevents the rational use of aluminum ore resources, resulting in a great waste of high-alumina bauxite resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A wet production process for sintered brown corundum, which uses high-alumina bauxite raw ore with an alumina content of 75% and industrial alumina as main raw materials, specifically comprising the following steps:

[0027] (1) Add 80% high-alumina bauxite (high-alumina bauxite is pre-crushed, particle size not greater than 10mm) and 45% γ-alumina in the wet ball mill by weight percentage, and then add binder and main raw material weight 0.8 After doubling of water, start to grind, grind 10h to get mud a, the particle size 600 mesh sieves of particle size in mud a is 0.8%; Described binding agent is made up of polyaluminum chloride, polyvinyl alcohol and bentonite: polyaluminum chloride addition is 0.15% of the weight of the main raw material, the addition of polyvinyl alcohol is 0.1% of the weight of the main raw material, and the addition of bentonite is 0.1% of the weight of the main raw material;

[0028] (2) Dehydration: mud a is dehydrated in the filter press for...

Embodiment 2

[0033] A wet production process for sintered corundum, which uses high alumina bauxite raw ore with an alumina content of 75% and industrial alumina as main raw materials, specifically comprising the following steps:

[0034] (1) Add 68% high-alumina bauxite (high-alumina bauxite is crushed in advance, particle size is not more than 10mm) and 55% γ-alumina in the wet ball mill by weight percentage, and then add binder and main raw material weight 0.9 After doubling of water, start to grind, grind 10h to get mud a, the particle size 600 mesh sieves of particle size in mud a are left 0.5%; Described binding agent is made up of polyaluminum chloride, polyvinyl alcohol and bentonite; Polyaluminum chloride addition is 0.2% of the weight of the main raw material, the addition of polyvinyl alcohol is 0.1% of the weight of the main raw material, and the addition of bentonite is 0.25% of the weight of the main raw material;

[0035] (2) Dehydration: mud a is dehydrated in the filter pr...

Embodiment 3

[0040] A wet production process for sintered brown corundum, which uses high-alumina bauxite raw ore with an alumina content of 76.5% and industrial alumina as main raw materials, specifically comprising the following steps:

[0041] (1) Add 72% high-alumina bauxite (high-alumina bauxite is crushed in advance, particle size is not more than 10mm) and 65% γ-alumina in wet ball mill by weight percentage, then add binder and main raw material weight 1.0 After doubling of water, start to grind, grind 10h to get mud a, the particle size 600 mesh sieves of particle size in mud a are left 0.5%; Described binding agent is made up of polyaluminum chloride, polyvinyl alcohol and bentonite; Polyaluminum chloride addition is 0.3% of the weight of the main raw material, the addition of polyvinyl alcohol is 0.15% of the weight of the main raw material, and the addition of bentonite is 0.4% of the weight of the main raw material;

[0042] (2) Dehydration: mud a is dehydrated in the filter pr...

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Abstract

The invention discloses a wet production process of sintered brown fused alumina. The method comprises the following steps: with high bauxite and aluminum oxide as main raw materials, adding 65-80% byweight of high bauxite and 45-65% by weight of aluminum oxide into a container, adding a binding agent and water accounting for 0.8-1.0 time of the weight of the main raw materials, carrying out sealing and grinding to obtain slurry a, and controlling the particle sizes of particles in the slurry a to be 600 meshes and screen residues to be less than 0.5%; and dehydrating, forming, drying and calcining the slurry a successively to obtain the sintered brown fused alumina. The process of the invention changes a traditional dry method for producing sintered brown fused alumina and is low in energy consumption; and produced sintered brown fused alumina product contains 97% or more of aluminum oxide, and has excellent quality.

Description

technical field [0001] The invention belongs to the technical field of refractory material production, and in particular relates to a wet production process of sintered brown corundum. Background technique [0002] With the continuous improvement of the performance requirements of refractory materials, the proportion of corundum with aluminum oxide greater than 90 in refractory materials is increasing. The corundum used with aluminum oxide greater than 90 mainly includes fused corundum and sintered corundum. Fused corundum is made by melting industrial alumina or bauxite in an electric arc furnace at 2000-2400 degrees. Due to the large amount of electricity used, Product cost is higher. [0003] Sintered brown corundum is sintered from high-quality bauxite. However, with the increasing scarcity of bauxite mineral resources, the overall grade of bauxite has declined. It is no longer possible to directly use high-grade ore for calcination. This not only leads to an increase ...

Claims

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Application Information

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IPC IPC(8): C04B35/101
CPCC04B35/101C04B2235/349C04B2235/444
Inventor 黄道伦
Owner 遵义兴正业矿业有限公司