Device for preparing aluminum from gaseous aluminum chloride through molten salt electrolysis and aluminum chloride feeding method

A technology of molten salt electrolysis and aluminum chloride, applied in the field of electrolytic aluminum, can solve the problems of increasing labor intensity of workers, environmental pollution, etc., and achieve the effects of fast dissolution speed, low energy consumption, and improved wettability

Active Publication Date: 2020-06-23
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this method, the unit power consumption rate is 13-15kW h / kgAl, and the industrial carbon anode will produce CO during electrolysis. 2 , and continue to consume, after a period of use, the anode needs to be replaced, which increases the labor intensity of the workers; in addition, the CO produced by the anode 2 、CF 4 and C 2 f 6 is a greenhouse gas, and the SO produced 2 will cause environmental pollution

Method used

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  • Device for preparing aluminum from gaseous aluminum chloride through molten salt electrolysis and aluminum chloride feeding method
  • Device for preparing aluminum from gaseous aluminum chloride through molten salt electrolysis and aluminum chloride feeding method
  • Device for preparing aluminum from gaseous aluminum chloride through molten salt electrolysis and aluminum chloride feeding method

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Effect test

Embodiment 1

[0041] A device for preparing aluminum by electrolysis of molten salt using gaseous aluminum chloride as raw material, which has a square electrolytic cell structure, such as figure 1 As shown, the device for preparing aluminum by molten salt electrolysis using gaseous aluminum chloride as raw material includes a shell, the shell is made of double-layer material, the outer layer is a stainless steel layer 101, and the inner layer of the stainless steel layer 101 is lined with refractory bricks, which are made of non-conductive It is made of insulating material and has certain corrosion resistance to the chloride system. The lower part of the device for producing aluminum by molten salt electrolysis using gaseous aluminum chloride as raw material is the aluminum storage area, which is used to store the liquid aluminum flowing down from the cathode. In the aluminum storage area, the bottom and side walls of the shell are made of carbon material layer 104, and the carbon material...

Embodiment 2

[0054] A device for preparing aluminum by electrolysis of molten salt using gaseous aluminum chloride as raw material, which is a cylindrical electrolytic cell, and its structural cross-section schematic diagram is shown in Figure 4 , including a shell, the shell is a double-layer material, the outer layer is a stainless steel layer 101, the present embodiment uses a steel layer, and the inner layer is an insulating layer 102, and the insulating layer material used in this embodiment is refractory brick.

[0055] The housing is airtight to form a cavity. A chlorine gas outlet 9 is provided at the upper end of the housing. The lower part of the housing cavity is an aluminum storage area. A carbon material layer 104 is provided on the inner wall of the cavity of the aluminum storage area. The side wall of the shell is provided with an aluminum outlet 10; the cavity above the aluminum storage area is an electrolysis area, and a non-conductive refractory material layer 103 is arra...

Embodiment 3

[0068] A kind of device that uses gaseous aluminum chloride as raw material molten salt electrolysis to prepare aluminum, the same as embodiment 1, the difference is:

[0069] The electrolyte solvent used in this embodiment is LiCl-CaCl containing 16% by mass of LiCl and 5% by mass of LiF. 2 -LiF mixed molten salt, the electrolysis temperature is 670-690°C, the pole distance is 10mm, the structure diagram is shown in Figure 8 , the specific structure is different in:

[0070] (1) An aluminum outlet pipeline is arranged in the channel left on the plate electrode and the inner surface of the shell. The aluminum outlet of the aluminum outlet pipeline is set in the aluminum storage area and immersed in the metal liquid aluminum. The aluminum outlet of the aluminum outlet pipeline It is arranged outside the housing cavity, and the aluminum outlet pipeline passes through the outlet provided above the housing. The aluminum outlet of the aluminum outlet pipeline is connected with a ...

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Abstract

The invention provides a device for preparing aluminum from gaseous aluminum chloride through molten salt electrolysis and an aluminum chloride feeding method, and belongs to the technical field of electrolytic aluminum. According to the device, gaseous aluminum chloride (AlCl3) channels are formed in a cathode and the cathode ends of bipolar electrodes, and in each gaseous aluminum chloride (AlCl3) channel, a plurality of distribution type feeding pipelines are arranged on the cathode and the surfaces of the cathode ends of the bipolar electrodes and used for being communicated with an electrolysis chamber above the electrodes, and the gaseous aluminum chloride (AlCl3) channels are communicated with gaseous aluminum chloride (AlCl3) inlets through a main feeding pipe. According to the device, the aluminum is prepared through the molten salt electrolysis by directly introducing gaseous aluminum chloride (AlCl3), and the metal molten aluminum is obtained. The method ensures the concentration of Al<3+> in molten salt in a cathode area, and therefore, the aluminum is efficiently produced through the electrolysis of the AlCl3. The method can improve the production efficiency and reducethe energy consumption on the basis of retaining the advantages of a AlCl3 electrolysis method for producing the aluminum.

Description

technical field [0001] The invention relates to the technical field of electrolytic aluminum, in particular to a device for preparing aluminum by electrolysis of molten salt using gaseous aluminum chloride as a raw material and a feeding method for aluminum chloride. Background technique [0002] Traditional aluminum smelting is produced by cryolite-alumina molten salt electrolysis, the electrolysis temperature is in the range of 930-1000°C, and the raw material is alumina. In this method, the unit power consumption rate is 13-15kW h / kgAl, and the industrial carbon anode will produce CO during electrolysis. 2 , and continue to consume, after a period of use, the anode needs to be replaced, which increases the labor intensity of the workers; in addition, the CO produced by the anode 2 、CF 4 and C 2 f 6 is a greenhouse gas, producing SO 2 Will cause environmental pollution. [0003] In the 1970s, a method of preparing metal aluminum by using solid aluminum chloride as ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/18C25C3/14C25C3/12C25C3/08C25C3/20
CPCC25C3/08C25C3/12C25C3/14C25C3/18C25C3/20
Inventor 王兆文高炳亮胡宪伟石忠宁陶文举刘风国杨酉坚刘爱民于江玉关月超王壮
Owner NORTHEASTERN UNIV
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