A method for linkage recovery of various solid waste materials in the aluminum smelting process

A technology for smelting process and recycling aluminum, which is applied in the field of fluorine-containing and aluminum-containing solid waste materials, and can solve the problems of low product purity and added value, high reagent consumption and energy consumption, and low recovery rate of fluorine and aluminum valuable elements. , to achieve the effect of improving economic and environmental benefits, low reagent consumption and energy consumption, and high recovery rate

Active Publication Date: 2022-01-11
YUNNAN RUNXIN ALUMINUM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The above recycling methods are mainly for the separate treatment or recycling of aluminum ash, carbon slag, cathode ash and other materials produced in the aluminum smelting process, and have not comprehensively considered the linkage of various solid wastes in the aluminum smelting process for the composition characteristics of various solid wastes recovery, and each method still has the disadvantages of low recovery rate of fluorine and aluminum valuable elements, low product purity and added value, high reagent consumption and energy consumption, etc.

Method used

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  • A method for linkage recovery of various solid waste materials in the aluminum smelting process
  • A method for linkage recovery of various solid waste materials in the aluminum smelting process
  • A method for linkage recovery of various solid waste materials in the aluminum smelting process

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Experimental program
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Effect test

Embodiment 1

[0101] The raw material of embodiment 1 and embodiment 2

[0102] Taking aluminum ash, cathode ash and carbon slag produced by an aluminum smelter in Yunnan as raw materials, the main components of each substance are as follows after fluorescence spectrum analysis:

[0103] Table 1. Main components of aluminum ash

[0104]

[0105] Table 2. Main components of cathode ash

[0106]

[0107]

[0108] Table 3. Main components of charcoal residue

[0109] element F Na Al Mg P S Cl K C Content (wt%) 37.11 15.56 8.84 0.27 0.04 3.64 0.15 1.64 26.52 element Ca V mn Fe co Ni Ga Sr O Content (wt%) 3.16 0.08 0.09 0.39 0.04 1.09 0.03 0.04 1.29

[0110] Example 1

[0111] (1) 100g of aluminum ash (composition as shown in Table 1), 10g of cathode ash (composition as in Table 2), and 100g of carbon slag (composition as in Table 3) were respectively crushed to -10mm (materials with a particle size below -10mm ...

Embodiment 2

[0132] (1) 90g of aluminum ash (composition as shown in Table 1), 10g of cathode ash (composition as in Table 2), and 100g of carbon slag (composition as in Table 3) were respectively crushed to -10mm (accounting for 95%) to meet the requirements of grinding Feeding granularity requirements;

[0133] (2) Mix the aluminum ash and cathode ash obtained in step (1) evenly in a mass ratio of 9:1, and dry-grind to -200 mesh by adopting a closed-circuit process of grinding and classification (materials with a particle size below -200 mesh) The mass accounts for more than 95% of the total material mass);

[0134] (3) The charcoal slag obtained in step (1) is wet-ground to -200 mesh (the quality of the material below -200 mesh accounts for more than 95% of the total material mass) with the grinding and classification closed-circuit process, and then adjusted Slurry, control the mass concentration of the slurry to be about 30%, add water glass, kerosene, and 2# oil flotation reagents i...

Embodiment 3

[0150] The raw material of embodiment 3

[0151] Taking aluminum ash, cathode ash and carbon slag produced by an aluminum smelter in Yunnan as raw materials, the main components of each substance are as follows after fluorescence spectrum analysis:

[0152] Table 6. Main components of aluminum ash

[0153] element Al Al 2 o 3

F Cl K Na S MgO CaO SiO 2

content(%) 4.35 66.32 9.14 0.05 0.39 9.49 0.25 0.20 3.36 3.79 element P Ba Sr Zr Cu mn Ni Fe 2 o 3

TiO 2

content(%) 0.02 0.02 0.01 0.01 0.01 0.01 0.01 2.30 0.27

[0154] Table 7. Main components of cathode ash

[0155] element F Na Al Mg P S Cl K C Content (wt%) 24.98 11.04 28.01 0.16 0.03 0.37 0.07 0.38 2.45 element Ca Ti mn Fe Ni Zr Ba Sr O Content (wt%) 2.12 0.22 0.02 3.46 0.02 0.01 0.01 0.01 26.64

[0156] Table 8. Main components of charcoal residue ...

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Abstract

The invention discloses a method for linked recovery of various solid waste materials in the aluminum smelting process, specifically making full use of the composition characteristics of aluminum ash, cathode ash and carbon slag, and comprehensively considering the linked recovery of various solid waste materials in the aluminum smelting process, fluorine and aluminum High recovery rate of valuable elements (≥90%), high product purity (main product AlF 3 and Al 2 o 3 Mixing purity ≥ 98%), can be used in the aluminum electrolysis process, the overall technical profit is high in added value, reagent consumption and energy consumption are small, which is conducive to protecting the ecological environment, effectively reducing material consumption and cost, and improving the economic benefits of solid waste recycling and environmental benefits.

Description

technical field [0001] The invention relates to a treatment method for linked recovery of solid waste materials such as carbon slag, cathode ash and aluminum ash produced in the aluminum smelting process, in particular for recovering fluorine-containing and aluminum-containing solid waste materials produced in the aluminum smelting process. Background technique [0002] During the aluminum smelting process, the main hazardous wastes produced include aluminum ash, carbon slag, cathode ash, etc. Aluminum ash is the slag and floating skin produced in the process of aluminum liquid, aluminum ingot, and secondary aluminum smelting and refining aluminum. It mainly comes from the remelting and casting process of electrolytic aluminum plants, aluminum processing plants, and secondary aluminum plants. Generally, about 20-40kg of aluminum ash is produced per ton of primary aluminum processed, and its main components are metal aluminum, alumina (about 30%-70% by mass), silicon dioxide,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/02C22B7/04C22B1/00C22B21/00C01D5/06C01F7/02C01F7/26C01F7/50
CPCC22B7/02C22B7/04C22B7/006C22B7/007C22B1/00C22B21/0023C01F7/50C01F7/02C01F7/26C01D5/06C01P2004/80Y02P10/20
Inventor 林艳杨万章崔焱刘丹王皓逸马路通邓聪
Owner YUNNAN RUNXIN ALUMINUM
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