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Device and method for treatment and recovery of solid wastes produced by aluminium electrolysis

A technology for recycling solid waste and aluminum, which is applied in the field of metallurgical environment, can solve environmental impact and other problems, and achieve the effect of complete separation and simple process operation

Inactive Publication Date: 2015-09-09
SHENYANG BEIYE METALLURGIGAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 2. Waste cathode carbon block
At present, whether it is an electrolytic aluminum plant or a small aluminum slag recycling workshop, this part of "aluminum ash" is discarded as garbage, which has a great impact on the environment
[0008] At present, there is no technically and economically feasible method to effectively treat and recycle aluminum electrolysis solid waste.

Method used

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  • Device and method for treatment and recovery of solid wastes produced by aluminium electrolysis
  • Device and method for treatment and recovery of solid wastes produced by aluminium electrolysis
  • Device and method for treatment and recovery of solid wastes produced by aluminium electrolysis

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] figure 1 , figure 2 , image 3 It is a box-type vacuum resistance furnace of "a device for processing and recycling aluminum electrolytic solid waste" of the present invention. 3. Refractory concrete wall 15, material chamber 6, refractory concrete cylinder 23, heat radiation baffle 10, cover type crystallizer 4, cylinder type crystallizer 21, electrolyte crystallization chamber 24, alkali metal crystallization chamber 25, heat insulation board 18. It consists of a vacuum exhaust pipe 7, an argon gas filling pipe 16, a vacuum pressure gauge 17 and an electrode 22 for inputting electric energy to the waste cathode carbon block resistance heating element.

[0043] A section of the outer wall of the furnace shell below the upper edge of the furnace shell 1 is welded with a cooling water jacket 8 .

[0044] The furnace cover 2 is made of ferrous metal material and has a flange structure. A flange is also welded on the upper edge of the metal shell. A vacuum gasket is pr...

Embodiment 2

[0064] Figure 4 It is the C-C plane cross-sectional view when the resistance heating element made by the waste cathode carbon block of the aluminum electrolytic cell of the present embodiment is a U-shaped design, and the A-A plane and the B-B plane cross-sectional view are the same as in Embodiment 1, as figure 1 , figure 2 shown. The difference between this embodiment and the resistance furnace device structure of Embodiment 1 is that the resistance heating element 3 in the furnace is a U-shaped design, the upper surface of the resistance heating element is slightly higher than the upper surface of the graphite conductor by 15 cm, and the material added in the material chamber It is a mixed briquette made of grinding powder and aluminum ash for the lining of waste refractories in electrolytic cells.

[0065] Use the above-mentioned device to process and recycle aluminum electrolysis waste refractory lining grinding powder and aluminum ash mixed briquette, according to th...

Embodiment 3

[0072] Figure 5 , Image 6 It is the A-A sectional view and the C-C plane sectional view when the resistance heating element of the present embodiment is designed as two mutually parallel and independent linear shapes, and the B-B plane sectional view is the same as that of Embodiment 1, as figure 2 shown. The difference between this embodiment and the resistance furnace device structure of Embodiment 1 is that the resistance heating element 3 in the furnace is designed as two parallel and independent linear shapes, and the upper surface of the resistance heating element is flat with the upper surface of the graphite conductor. Qi, and the material added in the material chamber is the mixed compacted material of the waste refractory lining grinding material of the electrolytic cell and the Al-Fe alloy.

[0073] The resistance heating element 3 of this embodiment is designed as two mutually parallel and independent rectilinear shapes, and the two electrodes 22 of each indepen...

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Abstract

The invention provides a device and method for treatment and recovery of solid wastes produced by aluminium electrolysis. The device comprises a metal shell, a furnace cover, a fire-resistant and heat-preserving furnace wall body, a fire-resistant and heat-preserving furnace bottom, a resistance heater, a refractory concrete wall body, a material chamber, a refractory concrete column body, a thermal radiation baffle, a cover type crystallizer, a cylinder type crystallizer, an electrolyte crystallization chamber, an alkali metal crystallization chamber, a thermal baffle, a vacuum suction pipe, an argon gas inflatable tube, a vacuum manometer and electrodes for supplying electric energy to the resistance heater. According to the device and method for treatment and recovery of solid wastes produced by aluminium electrolysis, high temperature is generated by resistance heat of waste cathode carbon blocks, non-carbonaceous components in the solid wastes evaporate in the form of gas and crystallize in the device at different positions, so that the thorough separation of carbon, alkali metal and electrolyte is realized, the technological operation is simple, no residue, exhaust gas or waste water is produced in the whole separation process. The device and method for treatment and recovery of solid wastes produced by aluminium electrolysis are energy-saving and environment-friendly, and are very suitable for large-scale popularization and application in industry.

Description

technical field [0001] The invention belongs to the field of metallurgical environment, in particular to a device and method for processing and recycling aluminum electrolysis solid waste. Background technique [0002] Aluminum in the industry is produced by electrolysis using a cryolite-alumina electrolyte system at a temperature of 950-980°C. During the aluminum electrolysis production process, the following four types of solid waste are produced: [0003] 1. Anode carbon residue. The anode of the cryolite-alumina electrolyte system is made by crushing calcined petroleum coke into different particle sizes, mixing with coal tar pitch, kneading and molding, and then roasting. In the production process of aluminum electrolysis, carbon anodes are constantly consumed. In theory, 0.334 tons of carbon anodes are required to produce one ton of metal aluminum by electrolysis. In fact, for every ton of metal aluminum produced, the consumption of carbon anodes is more than 0.4 tons,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/06
CPCC25C3/06
Inventor 冯乃祥
Owner SHENYANG BEIYE METALLURGIGAL TECH CO LTD
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