Pure titanium production from titanium monoxide/titanium carbide soluble solid anode electrolysis

An anode electrolysis and titanium monoxide technology, which is applied in the field of titanium monoxide/titanium carbide soluble solid solution anode electrolysis to produce pure titanium, can solve the problems of high anode slime, continuous electrolysis cannot be carried out normally, and the electrode process is hindered.

Active Publication Date: 2005-12-28
鸿钛(北京)科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] (1) Use CaCl with high oxygen solubility 2 The molten salt system makes the oxygen content of the generated sponge titanium too high, and excessive electrolysis must be carried out to reduce the oxygen content, which in turn results in extremely low current efficiency;
[0009] (2) The raw material cathode preparation is very inconvenient, TiO 2 It is a semiconductor. In the initial stage of electrolysis, other metal materials must undertake the conduction of the electrodes. If the raw material cathode is too large, it will naturally cause a large voltage drop and hinder the progress of the electrode process;
[0010] (3) The solid-phase diffusion rate of oxygen ions is too slow to cause polarization so that the current density of t

Method used

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  • Pure titanium production from titanium monoxide/titanium carbide soluble solid anode electrolysis
  • Pure titanium production from titanium monoxide/titanium carbide soluble solid anode electrolysis
  • Pure titanium production from titanium monoxide/titanium carbide soluble solid anode electrolysis

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Anode preparation

[0051] Raw materials: carbon powder, titanium dioxide are mixed in the following reaction stoichiometric ratio.

[0052]

[0053] Forming pressure

[0054] The resistance of the pressed block before heat treatment was 38 ohm·cm, and the resistance dropped sharply to 0.1 ohm·cm after heat treatment. The elemental analysis of the material after heat treatment shows that its atomic ratio should be Ti 2 CO, the structural composition of the material was analyzed by means of X-ray diffraction, and the results are shown in the attached figure 1 , it can be seen from the figure that the structure of the material changes significantly after heat treatment, mainly TiC·TiO solid solution with metal conductivity.

Embodiment 2

[0056] Anode preparation

[0057] Raw materials: Titanium carbide, titanium dioxide powder mixed in the following reaction stoichiometric ratio.

[0058]

[0059] Preparation process conditions (see the table below)

[0060] Forming pressure

[0061] The resistance of the pressed block before heat treatment was 72 ohm·cm, and the resistance dropped sharply to 0.05 ohm·cm after heat treatment. The structural components of the material were analyzed by means of X-ray diffraction, and the results are shown in the appendix figure 2 , it can be seen from the figure that it is TiC·TiO solid solution after heat treatment.

Embodiment 3

[0063] temperature

[0064]

[0065] The data in the above table shows that carbon oxide gas is generated at the anode during the electrolysis process, and CO is the main form under the experimental conditions. After the electrolysis is completed, the cathodic deposition obtains pure titanium, which is washed with dilute hydrochloric acid (1wt%) and then washed with deionized water for 5 times and stored in natural drying. The cathode current efficiency calculated by Faraday's law is 90%; image 3 Scanning electron micrograph of the cathode product of Example 3. attached Figure 4Example 3 is an X-ray diffraction pattern of the cathode product, as can be seen from the figure, the cathode product has a crystal structure of pure titanium.

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Abstract

A process of preparing purified Ti by the way of electrolysis directly from sosoloid positive pole, TiO?mTiC. Mix the powder of C and TiO2 or TiC as measurement of chemical reaction. Then press to be certain size to make positive pole, TiO?mTiC in airvoid at 600-1600íµ. Electrolyte is halide fused salt of alkali. Electrolysis at 400-1000íµ. C and O in the positive pole form CO, CO2 and O2. Purified Ti is obtained from negative pole.

Description

technical field [0001] The invention belongs to the technical field of producing pure titanium by electrolysis, and in particular provides a method for producing pure titanium by anode electrolysis of titanium monoxide / titanium carbide soluble solid solution. The soluble anode TiO·mTiC (where 0≤m≤1) is directly electrolyzed in alkali metal and / or alkaline earth metal halide molten salt to prepare pure titanium. In this method, the carbon and oxygen contained in the anode are dissolved in carbon oxide gas ( CO, CO 2 ) or oxygen, titanium dissolves into the molten salt in the form of low-valent ions and deposits pure titanium at the cathode. By adopting the method, the technological process of continuous electrolytic production of pure titanium can be completed under the premise of no anode slime, and the production cost of titanium metal will be greatly reduced. Background technique [0002] Metal titanium has excellent physical and chemical properties, its density is 43% l...

Claims

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Application Information

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IPC IPC(8): C25C3/28
Inventor 朱鸿民焦树强顾学范
Owner 鸿钛(北京)科技有限公司
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