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High-efficiency utilization process of aluminum ash in electrolytic aluminum plant

A high-efficiency technology of aluminum ash, which is applied in the field of high-efficiency utilization of aluminum ash in electrolytic aluminum plants, can solve the problems of random discharge of waste and other problems, achieve the effect of solving the problem of random discharge of waste and pollution, simple production process, and improved recycling

Active Publication Date: 2021-09-17
内蒙古铧钰环保材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the production process of the refining slag is simple, and most of the raw materials are solid waste, which can greatly solve the problem of random discharge of waste and pollution by enterprises, and improve the recycling of solid waste and pollutant resources.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030]A high-efficiency utilization process of aluminum ash in an electrolytic aluminum plant, comprising the following steps: separately pulverizing and screening aluminum ash and waste aluminum ash to ensure that the particle size is below 20 mm, and then ball milling until the particle size is between 4 and 5 mm; 40 parts by weight, 10 parts by weight of waste aluminum ash powder, and 50 parts by weight of calcium carbide slag after calcining are mixed evenly in a mixer, and then pellets with a diameter of about 45 to 50 mm are made with a ball press machine; the pellets are added to an electric furnace (model 5000KVA , Xi’an Machinery Manufacturing Co., Ltd.), sintered at 1400°C for 30 minutes at high temperature, cooled naturally to room temperature, and crushed to a particle size of 30-40mm to obtain refining slag; Achieves remarkable purifying action. At the same time, the production process of the refining slag is simple, and most of the raw materials are solid waste, ...

Embodiment 2

[0033] A high-efficiency utilization process of aluminum ash in an electrolytic aluminum plant, comprising the following steps: separately pulverizing and screening aluminum ash and waste aluminum ash to ensure that the particle size is below 20 mm, and then ball milling until the particle size is between 4 and 5 mm; 40 parts by weight, 10 parts by weight of waste aluminum ash powder, and 50 parts by weight of calcium carbide slag after modification and calcining are mixed uniformly in a mixer, and then pellets with a diameter of about 45 to 50 mm are made with a ball press machine; the pellets are added to the electric furnace ( Model 5000KVA, Xi'an Machinery Manufacturing Co., Ltd.), sintered at a high temperature of 1400 ° C for 30 minutes, cooled naturally to room temperature, and crushed to a particle size of 30-40 mm to obtain refining slag.

[0034] The preparation method of the modified and calcined calcium carbide slag is as follows: crush and sieve the calcium carbide...

Embodiment 3

[0036] A high-efficiency utilization process of aluminum ash in an electrolytic aluminum plant, comprising the following steps: separately pulverizing and screening aluminum ash and waste aluminum ash to ensure that the particle size is below 20 mm, and then ball milling until the particle size is between 4 and 5 mm; 40 parts by weight, 10 parts by weight of waste aluminum ash powder, and 50 parts by weight of calcium carbide slag after modification and calcining are mixed uniformly in a mixer, and then pellets with a diameter of about 45 to 50 mm are made with a ball press machine; the pellets are added to the electric furnace ( Model 5000KVA, Xi'an Machinery Manufacturing Co., Ltd.), sintered at a high temperature of 1400 ° C for 30 minutes, cooled naturally to room temperature, and crushed to a particle size of 30-40 mm to obtain refining slag.

[0037] The preparation method of the modified calcined calcium carbide slag is as follows: mix 50 parts by weight of water and 50 ...

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Abstract

The invention discloses a high-efficiency utilization process of aluminum ash in an electrolytic aluminum plant. Aluminum ash and waste aluminum ash are pulverized and ball-milled respectively; ~3.0 parts by weight are mixed evenly, and then pressed into pellets with a diameter of about 45-50mm; the pellets are sintered at 1300-1500°C for 20-80 minutes at high temperature, cooled naturally, and crushed to obtain refining slag. The refining slag can be used for refining molten steel, can deoxidize and desulfurize, and realizes a significant purification effect on molten steel. At the same time, the refining process is simple, and most of the raw materials are solid waste. The utilization rate of solid waste is extremely high, which can greatly solve the problem of random waste discharge and pollution by enterprises, and improve the recycling of solid waste and pollutant resources.

Description

technical field [0001] The invention belongs to the technical field of solid waste reuse, and in particular relates to a high-efficiency utilization process of aluminum ash in an electrolytic aluminum plant. Background technique [0002] Aluminum ash is a by-product of primary aluminum production (electrolytic aluminum) and aluminum alloy smelting and refining, because aluminum ash contains soluble chlorides and fluorides of alkali metal potassium and sodium, and the nitrides in it are hydrolyzed in water. NH 3 and the water-soluble NaAlO produced by the reaction 2 ; It will affect the environment and is considered to be toxic and harmful solid waste. And every ton of electrolytic aluminum produced will form 30-50kg of aluminum ash, and the total amount of aluminum ash produced by the aluminum product industry is as high as 1-2 million tons per year. [0003] The composition of aluminum ash has obvious differences due to different production links and processes. The main ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/064C21C7/06
CPCC21C7/06C21C7/064Y02P10/20
Inventor 颜雄伟
Owner 内蒙古铧钰环保材料有限公司