Electrolysis method

An electrolysis method and electrolytic cell technology are applied in the field of high-efficiency continuous electrolysis, which can solve the problems of reducing the efficiency of electrolytic metal powder and consuming labor costs, and achieve the effects of high current utilization rate and high efficiency.

Active Publication Date: 2015-01-28
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
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Problems solved by technology

[0003] The electrolysis method is one of the current industrial production of metal powder. The conventional electrolysis method needs to scrape off the electrolyzed powder on the cathode substrate regularly, which greatly consumes unnecessary labor costs.
Moreover, when the metal powder is electrolyzed on the cathode plate, it will grow slowly and form a coarse metal powder. Secondly, the electrolysis of the metal powder enriched on the cathode plate will reduce the efficiency of the electrolysis of the metal powder.

Method used

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  • Electrolysis method

Examples

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Embodiment 1

[0019] Embodiment 1: In this embodiment, zinc powder is electrolyzed. On the basis of the traditional electrolysis method, one of the electrodes is changed to a cylindrical shape, and the other electrode is placed inside the cylindrical shape to form an electrolyzer, and then the electrolyzer is Put it in an electrolytic cell, use zinc sulfate heptahydrate and ammonium sulfate solution, adjust the pH value with ammonia water, and perform electrolysis in an alkaline environment with a current density of 850A / ㎡. Cylindrical aluminum is used as the cathode electrode, and rod-shaped graphite is used as the anode electrode. The distance between the cathode and anode electrodes is 30mm, forming a concentric shaft shape with an axial length of 180mm. The electrolyte continuously enters the electrolytic cell from the axial direction of the cylindrical electrolyzer, and the water pressure of the circulating electrolyte entering the electrolyzer is 0.0006MPa, and the electrolysis is comp...

Embodiment 2

[0020] Example 2: In this example, iron powder is electrolyzed. On the basis of the traditional electrolysis method, one of the electrodes is changed to a cylindrical shape, and the other electrode is placed inside the cylindrical shape to form an electrolyzer, and then the electrolyzer is Put it into the electrolytic cell, use highly polished stainless steel as the cathode, and low-carbon steel as the anode, and their materials can be ferrous metal waste, such as rolled steel scale, low-grade ore, steel, cast iron, sponge iron briquettes, etc., the electrolyte for chloride. Adjust the pH with industrial ammonia. The current density during electrolysis is 2.8A / dm 2 , Heteropolar spacing is 50mm. The electrolyte continuously enters the electrolyzer from the axial direction of the cylindrical electrolyzer, and the water pressure when the circulating electrolyte enters the electrolyzer is 5PMa. The particle size of the electrolyzed iron powder is below 14um.

Embodiment 3

[0021] Embodiment 3: In this embodiment, nickel powder is electrolyzed. On the basis of the traditional electrolysis method, one of the electrodes is changed into a cylinder, and the other electrode is placed inside the cylinder to form an electrolyzer, and then the electrolyzer is Put it into the electrolytic cell, and the electrolyte is made of nickel sulfate and ammonium sulfate according to a certain ratio. The anode material is lead-silver alloy, and the cathode material is titanium metal. The current density is 2000A / ㎡, and the distance between different plates is 50mm. The electrolyte continuously enters the electrolyzer from the axial direction of the cylindrical electrolyzer, and the water pressure when the circulating electrolyte enters the electrolyzer is 3.5MPa. The particle size of the electrolytic nickel powder is less than 9.3um.

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Abstract

The invention relates to an electrolysis method and belongs to the field of metal powder preparation. On the basis of a conventional electrolysis method, one electrode is changed into a cylinder shape to be used as an electrolyser; another electrode is arranged inside the cylindrical electrode; electrolyte continuously enters in the electrolyser in the axis direction of the cylindrical electrode; and the enter pressure of the electrolyte is 0.0006 to 5MPa. In the continuous electrolysis process, metal powder electrolyzed out on a cathode plate is flushed by the circulating electrolyte; after the electrolysis is completed, the electrolyte is stood; and finally, the electrolytic metal powder is obtained. The electrolytic metal powder obtained by the method has high efficiency and high current utilization rate and various fine electrolytic powder can be obtained.

Description

technical field [0001] The invention relates to a high-efficiency continuous electrolysis method and technology, belonging to the field of metal powder preparation. Background technique [0002] Metal powders are widely used in practical applications and can be used as raw materials for powder metallurgy or directly used. Metal powder is a loose substance, and its performance comprehensively reflects the properties of the metal itself, the properties of individual particles and the characteristics of particle groups. The properties of metal powders are generally divided into chemical properties, physical properties and process properties. Chemical properties refer to metal content and impurity content. Physical properties include the average particle size and particle size distribution of the powder, the specific surface and true density of the powder, the shape, surface morphology and internal microstructure of the particles. Process performance is a comprehensive perfor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C5/02C25C7/06
Inventor 傅强段海龙钟毅
Owner KUNMING UNIV OF SCI & TECH
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