A device and method for preparing high-purity titanium metal powder by continuous electrolysis

A kind of metal titanium powder, high-purity technology, applied in the direction of electrolysis components, electrolysis process, electrodes, etc., can solve the problems of lower production efficiency, lower quality, high raw material cost, etc., and achieve high production efficiency, increase production efficiency, and high purity.

Active Publication Date: 2020-11-03
ZHEJIANG HAIHONG HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] 1. The FFC process uses high-purity TiO 2 As a raw material, the cost of the raw material is high, and the oxygen content of titanium metal prepared by the cathode is easy to exceed the standard;
[0011] 2. The existing anodic dissolution and electrolysis method has low production efficiency
The metal titanium powder of the cathode cannot be continuously taken out and collected
Moreover, the frequent operation of opening the electrolytic cell leads to poor air quality in the workshop, and the labor intensity of the staff is high, making it difficult to realize automated production
[0012] 3. Metal titanium products are easy to exceed the standard of O and N
Metal titanium powder is very easy to react with oxygen and nitrogen in the air at high temperature to reduce the quality, and open operation is very easy to pollute metal titanium
The existing batch method not only greatly reduces the production efficiency, but also the products tend to exceed the standard of O and N
[0013] 4. There is no convenient way to adjust the average particle size of the prepared titanium metal powder in the existing process

Method used

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  • A device and method for preparing high-purity titanium metal powder by continuous electrolysis
  • A device and method for preparing high-purity titanium metal powder by continuous electrolysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] use figure 1 As shown in the molten salt electrolysis device configured with a conveyor belt type rotary cathode, a titanium-containing conductive ceramic anode 1 prepared by the above method is selected, and the chemical composition is TiC 0.33 o 0.67 . The cathode 2 (belt type) is SUS304 stainless steel with a thickness of 0.5 mm. With LiCl-NaCl-KCl-TiCl 2 -TiCl 3 The molten salt is the electrolyte, and the content of titanium ions is 4%wt. The inert gas atmosphere 8 in the electrolytic cell is protected by argon, and the electrolysis is carried out at 550°C. The electrolytic cell voltage is 4.1V, and the cathode current density is 0.3A / cm 2 . The rotation rate of the cathode 2 is 0.2m / s. After 12 hours of electrolysis, the metal titanium powder at the bottom of the inert gas atmosphere / vacuum environment storage tank 13 is passed through the metal titanium mesh filter mechanism to recover the molten salt. Next, the filtered titanium metal powder is cooled to ...

Embodiment 2～6

[0053] Change the transmission rate of negative electrode 2 (belt type), all the other experimental conditions are identical with embodiment 1, and the average particle diameter result of metal titanium powder that obtains is as follows,

[0054] Example Speed ​​of rotating cathode (m / s) Average particle size of titanium metal powder (μm) 2 0.05 487 3 0.1 135 4 0.5 30 5 1 13 6 2 3.5

Embodiment 7

[0056] use figure 1 The shown molten salt electrolysis device is configured with a conveyor-belt rotary cathode, and the chemical composition is TiC 0.2 o 0.4 N 0.4 Titanium-containing conductive ceramic anode. The conveyor belt rotating cathode is a Ti metal belt with a thickness of 0.3 mm. with Ca 2 Cl-NaCl-KCl-TiCl 2 The molten salt is the electrolyte, and the content of titanium ions is 3%wt. Electrolysis was carried out at 670°C. The electrolytic cell voltage is 3.6V, and the cathode current density is 0.1A / cm 2 . All the other experimental conditions were consistent with Example 1.

[0057] The average particle diameter of the obtained metal titanium powder was 55 μm, and the elemental analysis results were: Ti: 99.50%, C: 0.05%, O: 0.15%, Fe: 0.07%. The yield of Ti element is 97%, and the current efficiency of the cathode is 91%.

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Abstract

The invention discloses a device and a method for continuously electrolyzing and preparing high-purity metal titanium powder. The method of the present invention electrolyzes a titanium-containing conductive ceramic anode and a rotary cathode in a molten salt electrolytic cell, and the rotary cathode continuously transfers the metal titanium powder deposited on the surface of the cathode to the top of the molten salt, and the unloading scraper scrapes the metal titanium After the powder is collected, the molten salt is recovered by filtration, the separated metal titanium powder is cooled, washed with deoxygenated deionized water, and finally vacuum-dried to obtain the prepared metal titanium powder. The device includes a molten salt electrolysis device, a continuous collection device for metal titanium powder, a filter device, a cleaning device and a vacuum drying device. The invention realizes the continuous preparation of high-purity metal titanium powder, and can adjust the average particle diameter of the prepared metal titanium powder on-line, has high production efficiency, simple operation and high product purity.

Description

technical field [0001] The invention belongs to the field of nonferrous metal smelting, and in particular relates to a method and a device for continuously electrolytically preparing high-purity titanium powder. Background technique [0002] Titanium metal powder metallurgy offers the possibility of cost-effective near-net-shape metal components with complex structures. Titanium metal powder can be first produced by mixing with other metal elements or by pre-alloying, and then consolidated by methods such as metal injection molding, hot isostatic pressing, direct powder rolling or laser sintering. The quality and cost of metal titanium powder are extremely important to the quality of its powder metallurgy products. [0003] Traditional metal titanium powder needs to use metal titanium prepared by Kroll process as raw material. While the Kroll process is complex and costly, the process involves chlorination of TiO in the presence of carbon 2 ore, and makes the resulting Ti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C5/04C25C7/02C25C7/08
CPCC25C7/02C25C7/08C25C5/04C25C7/025
Inventor 陈海贤曹佳培
Owner ZHEJIANG HAIHONG HLDG
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