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Utilization method of industrial red mud waste powder

A technology of waste powder and red mud, which is applied in the field of red mud ceramics, can solve the problems of red mud occupying storage space and consuming manpower and material resources, and achieve the effects of avoiding waste of manpower and material resources, avoiding pollution, and saving production costs

Inactive Publication Date: 2021-06-15
中骥新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a method for utilizing industrial red mud waste powder, and makes red mud ceramic products from the red mud produced in the aluminum ore production process, so as to solve the problem that red mud occupies storage space and consumes manpower and material resources, and realizes waste use, turn waste into treasure

Method used

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  • Utilization method of industrial red mud waste powder

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Effect test

Embodiment 1

[0045] A method for utilizing industrial red mud waste powder, comprising the steps of:

[0046] Step 1: providing wet red mud lumps, mixing the wet red mud lumps with water and then dispersing to form dispersed raw red mud slurry; the weight ratio of the wet red mud lumps to water is 1:1; the wet red mud lumps The particle size of the powder is below 200 nanometers;

[0047] Step 2: Use carboxylate ammonium salt to adjust the original red mud slurry with a pH value of 9-12, so that the pH value of the original red mud slurry is 8.5 to form a modulated red mud slurry; this step can increase the cohesiveness of the red mud powder, And in the follow-up process, the sintering activity of the red mud powder and the strength of the green body formed by the red mud powder can be improved;

[0048] Step 3: Leave the prepared red mud slurry at room temperature for 68 hours in the sedimentation tank, so that the prepared red mud slurry and carboxylate ammonium salt are fully soaked, r...

Embodiment 2

[0057] A method for utilizing industrial red mud waste powder, comprising the steps of:

[0058] Step 1: Provide wet red mud lumps, mix the wet red mud lumps with water and disperse to form dispersed raw red mud slurry; the weight ratio of the wet red mud lumps to water is 0.5:1; wet red mud lumps The particle size of the powder is below 200 nanometers;

[0059] Step 2: Use carboxylate ammonium salt to adjust the original red mud slurry with a pH value of 9-12, so that the pH value of the original red mud slurry is 7.5 to form a modulated red mud slurry; this step can increase the cohesiveness of the red mud powder, And in the follow-up process, the sintering activity of the red mud powder and the strength of the green body formed by the red mud powder can be improved;

[0060] Step 3: Put the prepared red mud slurry at room temperature for 72 hours in the sedimentation tank, so that the prepared red mud slurry and carboxylate ammonium salt are fully soaked, reacted and matur...

Embodiment 3

[0069] A method for utilizing industrial red mud waste powder, comprising the steps of:

[0070] Step 1: Provide wet red mud lumps, mix the wet red mud lumps with water and disperse to form dispersed raw red mud slurry; the weight ratio of the wet red mud lumps to water is 0.8:1; wet red mud lumps The particle size of the powder is below 200 nanometers;

[0071] Step 2: Use carboxylate ammonium salt to adjust the original red mud slurry with a pH value of 9-12, so that the pH value of the original red mud slurry is 8 to form a modulated red mud slurry; this step can increase the cohesiveness of the red mud powder, And in the follow-up process, the sintering activity of the red mud powder and the strength of the green body formed by the red mud powder can be improved;

[0072] Step 3: Put the prepared red mud slurry at room temperature for 60 hours in the sedimentation tank, so that the prepared red mud slurry and carboxylate ammonium salt are fully soaked, reacted and matured...

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Abstract

The invention provides a utilization method of industrial red mud waste powder, and belongs to the technical field of red mud ceramics. The method comprises the following steps: mixing wet red mud blocks with water, and conducting dispersing to form raw red mud slurry; adjusting the pH value of the raw red mud slurry by using ammonium carboxylate to form modulated red mud slurry; conducting standing to form red mud clinker slurry; adding a foaming agent, a dispersing agent and an adhesive into the red mud clinker slurry to form a red mud slurry material; drying the red mud slurry and conducting powder sprraying to obtain hollow powder; carrying out pre-sintering treatment on the hollow powder; mixing and stirring the modulated red mud slurry and the hollow powder, adding a lubricant, uniformly conducting stirring, and conducting drying to obtain molded powder; manufacturing a mold, and putting the formed powder into the mold for pressing to form a blank body; and sintering the blank body to form a red mud ceramic product. The red mud is used as a raw material of a ceramic product, so that waste utilization is realized, environmental pollution caused by storage of the red mud is avoided, and the requirements of green and sustainable development are met.

Description

technical field [0001] The invention belongs to the technical field of red mud ceramics, and in particular relates to a method for utilizing industrial red mud waste powder. Background technique [0002] Red mud, also known as red mud, is an industrial solid waste discharged after refining alumina from bauxite. Generally, it contains a large amount of iron oxide, and its appearance is similar to red soil, hence the name. But some are brown or even off-white because they contain less iron oxide. Red mud is an insoluble residue, which can be divided into sintering red mud, Bayer red mud and combined red mud. The main component is SiO 2 、Al 2 o 3 , CaO, Fe 2 o 3 Wait. [0003] With the development of the aluminum industry and the reduction of the grade of bauxite ore, the amount of red mud will increase, and the red mud is an alkaline substance. With the washing of rainwater, the alkali in the red mud will be dissolved, which may pollute Surface water and groundwater, s...

Claims

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Application Information

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IPC IPC(8): C04B33/132
CPCC04B33/1322C04B33/1328C04B2235/656Y02P40/60
Inventor 黄术军
Owner 中骥新材料有限公司
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