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Molten salt electrolysis cathodic precipitate separation method and separation equipment

A technology of molten salt electrolysis and separation equipment, applied in the direction of electrolysis process, electrolysis components, etc., can solve the problems of low process economy, environmental impact, consumption of large dilute acid, etc.

Active Publication Date: 2016-10-05
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Adopt above-mentioned method, need to consume a large amount of dilute acid and wash through repeatedly, cause process economy to be low; And a large amount of additional products and waste acid that can produce in the reaction process have serious impact on environment

Method used

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  • Molten salt electrolysis cathodic precipitate separation method and separation equipment

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Take 1500g of the cathode precipitate obtained by molten salt electrolysis of titanium, crush it to a particle diameter of 150 μm with a gas powder machine, send the crushed mixture powder into a sedimentation tank filled with carbon tetrachloride liquid, and control the stirring device at a speed of 100r / min Stir the carbon tetrachloride liquid for 30 minutes. Extract the carbon tetrachloride containing electrolyte suspension in the upper layer of the deposition tank, send the liquid into the heating tank, keep the temperature of the heating tank at 77°C, and evacuate to -85kPa until the carbon tetrachloride is completely volatilized to obtain pure electrolyte; The carbon tetrachloride containing titanium metal powder in the tank is sent to another heating tank, and the temperature of the heating tank is kept at 77°C, and the vacuum is evacuated to -85kPa until the carbon tetrachloride is completely volatilized to obtain pure titanium metal powder. The electrolyte cont...

Embodiment 2

[0044]Take 1500 g of cathode precipitates obtained by molten salt electrolysis of titanium, use a ball mill to crush to a particle diameter of 44 μm, send the crushed mixture powder into a deposition tank filled with carbon tetrachloride liquid, and control the stirring speed of the stirring device to 600r / min for four The carbon chloride liquid was stirred for 20 minutes. Extract the carbon tetrachloride containing electrolyte suspension in the upper layer of the deposition tank, send the liquid into the heating tank, keep the temperature of the heating tank at 150°C, and evacuate to -90kPa until the carbon tetrachloride is completely volatilized to obtain pure electrolyte; The carbon tetrachloride containing titanium metal powder in the tank is sent to another heating tank, and the temperature of the heating tank is kept at 150°C, and the vacuum is evacuated to -90kPa until the carbon tetrachloride is completely volatilized to obtain pure titanium metal powder. The electroly...

Embodiment 3

[0046] Take 2500g of the cathode precipitate obtained by the electrolysis of vanadium in molten salt, crush it to a particle diameter of 44 μm with a vibrating impactor, send the crushed mixture powder into a deposition tank filled with carbon tetrachloride liquid, and control the stirring device at a speed of 400r / min The carbon tetrachloride liquid was stirred for 35 minutes. Extract the carbon tetrachloride containing electrolyte suspension in the upper layer of the deposition tank, send the liquid into the heating tank, keep the temperature of the heating tank at 100°C, and evacuate to -90kPa until the carbon tetrachloride is completely volatilized to obtain pure electrolyte; The carbon tetrachloride containing titanium metal powder in the tank is sent to another heating tank, and the temperature of the heating tank is kept at 100°C, and the vacuum is evacuated to -90kPa until the carbon tetrachloride is completely volatilized to obtain pure titanium metal powder. After tes...

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Abstract

The invention relates to a molten salt electrolysis cathode educt separating method and device. The molten salt electrolysis cathode educt separating method comprises the following steps that a lump educt is crashed into powder, the powder is conveyed into a sediment tank containing medium liquid, physical separation is achieved according to the different densities of substances, and the medium liquid is heated to volatilize, so that metal powder is obtained. The device comprises the sediment tank, an overflow pipe, a separating medium tank and a backflow pipe, wherein one end of the overflow pipe is communicated with the separating medium tank, the other end of the overflow pipe is communicated with the side face of the sediment tank, a filter is arranged at one end of the backflow pipe and is located in the separating medium tank, the other end of the backflow pipe is communicated with the sediment tank, a pump is arranged on the backflow pipe, and a stirring device is arranged in the sediment tank. By the adoption of the molten salt electrolysis cathode educt separating method and device, metal powder separation is achieved according to the fact that the density of the metal powder is different from the density of an electrolyte, no addition product is generated in the whole process, the environment is almost not affected, and the separated electrolyte can be recycled.

Description

technical field [0001] The invention relates to the field of non-ferrous metal refining, in particular to a method and equipment for separating cathode precipitates of molten salt electrolysis Background technique [0002] Molten salt electrolysis is a method of dissolving metal compounds containing impurities in molten salt for electrolysis, thereby extracting and obtaining pure metals. The metal ions in the electrolytic cell gain electrons at the cathode to form pure metal, which is mixed with the electrolyte in the form of metal powder. After the mixture cools, the electrolyte coats the metal powder to form a cathodic precipitate in the form of a block. [0003] In the traditional method, the metal powder is separated from the above-mentioned cathode precipitate, and a hydrometallurgical process is used. That is to use dilute acid solution to soak and rinse the precipitate, so that the electrolyte undergoes a chemical reaction and dissolves in the dilute acid solution, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C7/08
Inventor 邓斌穆天柱陈兵穆宏波何安西赵三超闫蓓蕾朱福兴彭卫星
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP