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Aluminum ash utilizing method

A technology of aluminum ash and aluminum ash slag, applied in chemical instruments and methods, ammonia preparation/separation, inorganic chemistry, etc., can solve problems restricting the development of the secondary aluminum industry, and achieve large-scale promotion and application and high utilization efficiency , low cost effect

Inactive Publication Date: 2017-06-27
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the current situation of aluminum ash accumulation and landfill has seriously restricted the development of my country's secondary aluminum industry. Therefore, it is urgent to find a method for efficient utilization of aluminum ash to maximize the use of aluminum ash, protect the ecological environment, and realize the recycling of solid waste slag.

Method used

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  • Aluminum ash utilizing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] For example, a method for utilizing aluminum ash includes:

[0054] In a dust-proof environment, the aluminum ash raw material (containing 15.7% alumina, 16.4% elemental aluminum, and 20.5% aluminum nitride) is sent to the ash frying device for frying ash treatment. The temperature of the ash frying is 680 ° C. Metal aluminum in the aluminum ash raw material is extracted to obtain aluminum ash slag;

[0055] Air-cool the aluminum ash to about 80°C and pour it into the reaction kettle, add water to the reaction kettle, the aluminum ash and water are deaminated by hydrolysis at a mass ratio of 1:2, and the prepared ammonia gas is collected by an absorption tower;

[0056] Put the remaining slurry after deamination into a container and put it into a box-type electric furnace for drying treatment to obtain massive aluminum slag, and send the massive aluminum slag to a vibration mill for ball milling to obtain secondary aluminum ash;

[0057] The secondary aluminum ash is t...

Embodiment 2

[0060] For example, a method for utilizing aluminum ash includes:

[0061] In a dust-proof environment, the aluminum ash raw material (containing 7.5% alumina, 23.5% elemental aluminum, and 30.1% aluminum nitride) is sent to the ash frying device for ash frying. Metal aluminum in the aluminum ash raw material is extracted to obtain aluminum ash slag;

[0062] Air-cool the aluminum ash to about 80°C and pour it into the reaction kettle, add water to the reaction kettle, the aluminum ash and water are deaminated by hydrolysis at a mass ratio of 1:3, and the prepared ammonia gas is collected by an absorption tower;

[0063] Put the remaining slurry after deamination into a container and put it into a box-type electric furnace for drying treatment to obtain massive aluminum slag, and send the massive aluminum slag to a vibration mill for ball milling to obtain secondary aluminum ash;

[0064] The secondary aluminum ash is treated as follows: Portland cement clinker, limestone and...

Embodiment 3

[0067] For example, a method for utilizing aluminum ash includes:

[0068] In a dust-proof environment, the aluminum ash raw material (containing 18.5% alumina, 16.5% elemental aluminum, and 20.4% aluminum nitride) is sent to the ash frying device for ash frying treatment. The ash frying temperature is 700 ° C, and the aluminum ash is extracted Metal aluminum in the raw material is obtained aluminum ash;

[0069] Air-cool the aluminum ash to about 80°C and pour it into the reaction kettle, add water to the reaction kettle, the aluminum ash and water are deaminated by hydrolysis at a mass ratio of 1:2.5, and the prepared ammonia gas is collected by an absorption tower;

[0070] Put the remaining slurry after deamination into a container and put it into a box-type electric furnace for drying treatment to obtain massive aluminum slag, and send the massive aluminum slag to a vibration mill for ball milling to obtain secondary aluminum ash;

[0071] The secondary aluminum ash is t...

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Abstract

The invention discloses an aluminum ash utilizing method. The aluminum ash utilizing method comprises the following steps that S101, aluminum ash residues are poured into a reaction kettle, water is added into the reaction kettle and is stirred and turned to form slurry, hydrolysis reaction for deamination is performed, escaped ammonia gas generated during hydrolysis reaction for deamination enters an absorbing tower, and spraying water or acid is adopted in the absorbing tower to collect the escaped ammonia gas; S102, the slurry left after deamination is charged into a material storage container, the container is put in a box-type electric furnace, drying treatment is performed to obtain massive aluminum residues, the massive aluminum residues are fed into a mill, and ball-milling treatment is performed to obtain secondary aluminum ash. By adopting the aluminum ash utilizing method, the additional value of the aluminum ash is greatly improved, and environmental pollution caused by additional value piling and backfilling is avoided. The aluminum ash utilizing method is high in utilizing efficiency, simple in technological process, low in investment, low in cost and environmentally friendly and facilitates large-scale popularization and application.

Description

technical field [0001] The present disclosure generally relates to a method for recycling aluminum ash, and specifically relates to a method for utilizing aluminum ash. Background technique [0002] Aluminum ash is a kind of industrial waste. At present, the way most factories deal with aluminum ash is to accumulate it in landfill, which seriously pollutes the environment. A small number of factories only recycle elemental aluminum in aluminum ash, and the remaining large amount of aluminum ash has not been effectively resolved. Although there are some studies on the application of aluminum ash, such as preparing water purifiers, paving materials, ceramics, etc. with aluminum ash, most of them stay in the theoretical and laboratory stage and have not been applied on a large scale. [0003] The composition of aluminum ash is very complex, mainly composed of elemental aluminum, aluminum oxide and aluminum nitride. For the electrolytic aluminum industry, aluminum ash usually ...

Claims

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Application Information

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IPC IPC(8): C01C1/02C04B7/147C03C6/10C22B21/00C22B7/04
CPCC01C1/026C03C1/002C04B7/147C22B7/001C22B7/04C22B21/0069Y02P10/20Y02P40/10
Inventor 倪红军顾涛胡永胜吕帅帅汪兴兴朱昱黄明宇胡妙关
Owner NANTONG UNIVERSITY
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