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

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...

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 the cathode is very low, and the electrode area gradually changes with the progress of electrolysis, even if the electrolysis current is carried out in a constant potential manner, it will also increase with the TiO 2 The increase of the reduced amount increases, so it is difficult to achieve stable electrolysis in industrial production;

However, the preparation process of its anode still relies on very high temperature reduction conditions, and it does not essentially achieve the purpose of low-cost extraction of titanium.

And its electrolysis experiments are all based on low-oxygen titanium carbide. The anode carbon content is too high to produce a large amount of anode slime, and continuous electrolysis cannot be carried out normally.

Images