Device and method for preparing high-purity titanium metal through molten salt electrolysis-high-temperature distilling

A molten salt electrolysis device and high-temperature distillation technology, applied in the field of high-purity titanium metal, can solve the problems of waste of high-purity titanium particles, secondary oxidation of high-purity titanium, and reduction of high-purity titanium yield, so as to achieve cost controllable, The effect of good product quality and short production cycle

Inactive Publication Date: 2019-05-31
UNIV OF SCI & TECH BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process of water washing and pickling will not only cause secondary oxidation of high-purity titanium, but also cause waste of high-purity titanium particles, which will eventually reduce the yield of high-purity titanium

Method used

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  • Device and method for preparing high-purity titanium metal through molten salt electrolysis-high-temperature distilling
  • Device and method for preparing high-purity titanium metal through molten salt electrolysis-high-temperature distilling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] TiCl 3 And NaCl-KCl (molar ratio is 1:1) according to the mass ratio of 1:25 after uniform mixing, put into the electrolytic cell, the cathode is liquid metal bismuth, and the anode is a sponge Ti plate. The electrolysis is carried out after pre-melting at 800°C, and the electrolysis is stopped when the anode material is completely dissolved, and the electrolysis cathode product is Bi-Ti alloy. The cathode product was transferred to distillation equipment, and vacuum distillation was carried out in a distillation flask at 1580°C. The distillation product is dried and packaged to obtain high-purity titanium metal.

Embodiment 2

[0030] TiCl 2 and CaCl 2 -NaF (molar ratio 3:2) is evenly mixed according to the mass ratio of 1:30, and then loaded into the electrolytic cell, the cathode is liquid metal tin, and the anode is titanium carbon-oxygen solid solution. Electrolysis after pre-melting is carried out at 900°C, and the cathode product of electrolysis is Sn-Ti alloy. The cathode product was transferred to a distillation apparatus for vacuum distillation at 2280°C. The distillation product is dried and packaged to obtain high-purity titanium metal, and the obtained tin is further recycled.

Embodiment 3

[0032] TiCl 3 And KCl-NaF (molar ratio is 2:3) according to the mass ratio of 1:27 after mixing evenly, put it into the electrolytic cell, the cathode is liquid metal lead, and the anode is a sponge Ti plate. Electrolysis after pre-melting is carried out at 700°C, and the cathode product of electrolysis is Pb-Ti alloy. The cathode product was transferred to a distillation apparatus for vacuum distillation at 1780°C. The distillation product is dried and packaged to obtain high-purity titanium metal.

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Abstract

The invention discloses a device and method for preparing high-purity titanium metal through molten salt electrolysis-high-temperature distilling, and belongs to the field of preparing high-purity titanium through an electrochemical method. The method comprises the following production steps that a titanium containing halide electrolyte is added in an electrolytic bath for premelting, and then, heat preservation is conducted under the argon atmosphere; liquid metal (bismuth, tin, lead and the like) serves as a cathode, titanium sponge or soluble titanium containing matter (titanium carbon oxygen solid solution and the like) serves as an anode, and electrolysis is conducted; and after electrolysis is finished, a cathode titanium alloy product is subjected to high-temperature distilling, andfinally, the high-purity titanium metal is obtained. The method has the characteristics that energy consumption is low, the equipment is simple, the production period is short, and the titanium yieldis high. Through the method, impurities in the anode can be effectively removed, the low-oxygen high-purity titanium metal is obtained, and the good application prospect is achieved.

Description

technical field [0001] The invention relates to a method for preparing high-purity titanium metal based on liquid metal cathode molten salt electrolysis-high-temperature distillation, which belongs to the field of high-purity titanium production by electrolysis, and can finally obtain high-purity titanium metal. Background technique [0002] Titanium metal because of its low density (4.5g / cm 3 ), high melting point (1660°C), corrosion resistance, oxidation resistance, non-toxic and harmless and other excellent properties, it is called "future metal". It has a wide range of applications in the fields of aerospace, chemical industry, ships, biomedicine, civil building materials and sports equipment. On this basis, people refer to titanium metal with a titanium content higher than 99.95% or 99.99% (ie 3N5 or 4N) as high-purity titanium metal. High-purity titanium not only has the excellent properties of ordinary titanium, but also has excellent elongation (50-60%), reduction ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/28C25C7/02C25C7/00C22B9/02C22B34/12
CPCY02P10/20
Inventor 焦树强焦汉东王明涌朱骏
Owner UNIV OF SCI & TECH BEIJING
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