Processing method for recycling aluminum dross

A treatment method, the technology of waste aluminum ash, applied in the field of metallurgy, can solve the problem of a lot of waste aluminum ash, and achieve the effects of less environmental pollution, low roasting temperature, and simple operation process

Active Publication Date: 2012-07-11
HENAN KETAI WATER PURIFYING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there are also many literature reports on the resource utilization of waste aluminum ash

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A processing method for resource utilization of waste aluminum ash. The detailed steps of the processing method are as follows:

[0028] a. Add crushed limestone and catalyst sodium carbonate to the waste aluminum ash, and fully homogenize and mix the three materials. The weight ratio of the waste aluminum ash, limestone and sodium carbonate is 1: 1:0.2; the weight percentage of alumina in the waste aluminum ash is 70%, the weight percentage of calcium oxide in the limestone is 52.6%, and the particle size of the limestone after crushing is 160 mesh;

[0029] b. Put the fully homogenized and mixed materials in step a into a roasting reaction furnace (that is, a rotary kiln roasting furnace) for catalytic roasting, and roasting at a temperature of 1200°C for 1.5 hours;

[0030] c. Grind the product obtained after roasting in step b, and obtain calcium aluminate powder with a particle size of 100-200 meshes after grinding.

[0031] The results of the analysis of the product calci...

Embodiment 2

[0032] Embodiment 2: It is basically the same as embodiment 1, except that:

[0033] A processing method for resource utilization of waste aluminum ash, which is different from Embodiment 1 in:

[0034] Step a: The weight ratio between the waste aluminum ash, limestone and sodium carbonate is 1:0.9:0.2; the weight percentage of aluminum oxide in the waste aluminum ash is 72.4%, and the calcium oxide in the limestone accounts for The weight percentage is 51.6%, and the particle size of the crushed limestone is 130 mesh;

[0035] Step b: Put the fully homogenized and mixed materials in step a into a roasting reaction furnace (ie rotary kiln roasting furnace) for catalytic roasting, and roasting at a temperature of 1250°C for 1 hour;

[0036] Step c: the product obtained after roasting in step b is cooled and ground, and after grinding, the product calcium aluminate powder with a particle size of 100-200 mesh is obtained.

[0037] The results of the analysis of the product calcium alumina...

Embodiment 3

[0038] Embodiment 3: It is basically the same as Embodiment 1, except that:

[0039] A processing method for resource utilization of waste aluminum ash, which is different from Embodiment 1 in:

[0040] Step a: The weight ratio between the waste aluminum ash, limestone and sodium carbonate is 1:0.8:0.2; the weight percentage of aluminum oxide in the waste aluminum ash is 74%, and the calcium oxide in the limestone accounts for The weight percentage is 50%, and the particle size of the crushed limestone is 200 mesh;

[0041] Step b: Put the fully homogenized and mixed materials in step a into a roasting reaction furnace (ie rotary kiln roasting furnace) for catalytic roasting, and roasting at a temperature of 1300°C for 1 hour;

[0042] Step c: the product obtained after roasting in step b is cooled and ground, and after grinding, the product calcium aluminate powder with a particle size of 100-200 mesh is obtained.

[0043] The results of the analysis of the product calcium aluminate p...

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Abstract

The invention discloses a processing method for recycling aluminum dross, which comprises the following steps: adding crushed limestone and catalyst to aluminum dross, thoroughly homogenizing and mixing the three materials, carrying out catalyzed calcination on the thoroughly homogenized and mixed materials in a calcination reaction furnace, and directly grinding the calcined products or grindingthe calcined products after cooling, thus obtaining the calcium aluminate powder product. The processing method has a simple operational process, and can not cause new environmental pollution, thereby according with the policy for industry development. The invention recycles the aluminum dross, simultaneously reduces environmental pollution caused by the aluminum dross, improves the environmentalmanagement on surrounding areas, and also provides a reasonable and effective way to recycle waste aluminum dross. Thus, the invention has obvious economic benefits and social benefits.

Description

technical field [0001] The invention relates to a method for resource utilization of waste in the field of metallurgy technology, in particular to a treatment method for resource utilization of waste aluminum ash. Background technique [0002] Waste aluminum ash is the waste from electrolytic aluminum plants and waste from various aluminum processing industries, and the remaining secondary industrial waste after the aluminum recycling operation. This waste contains a certain amount of aluminum-containing compounds, and its composition and structure are relatively complex. It is difficult to recover the aluminum contained in it by the usual acid-dissolving or alkali-dissolving process; Floating dust is generated in the air, causing air pollution and environmental damage in surrounding areas. At present, most of the processing methods for its waste aluminum ash are piled up or buried, which will cause environmental pollution again and is not conducive to environmental protect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/16
Inventor 周秋涛罗保林
Owner HENAN KETAI WATER PURIFYING MATERIALS
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