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Improved process for smelting metallic titanium by electro-deoxidation method

A metal titanium and electro-deoxidation technology, applied in the fields of metallurgy and electrochemistry, can solve problems such as prolonging production time, decreasing production efficiency, and increasing resistance to deep deoxidation, and achieves the effects of improving current efficiency, shortening reaction time, and simple process structure

Inactive Publication Date: 2011-05-18
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The decrease of oxygen content leads to further increase of deep deoxygenation resistance, so effective electrolysis is difficult to carry out, and the proportion of side reactions gradually increases
Since the production has high requirements on the purity of metal products, the production time must be extended, resulting in a decrease in production efficiency, and at the same time, the effective utilization rate of the current also decreases.

Method used

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  • Improved process for smelting metallic titanium by electro-deoxidation method
  • Improved process for smelting metallic titanium by electro-deoxidation method
  • Improved process for smelting metallic titanium by electro-deoxidation method

Examples

Experimental program
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Effect test

example 1

[0019] Take 100g of titanium dioxide fine powder (≥99%), add 10g of 5% polyvinyl alcohol (PVA) aqueous solution, stir evenly, press it into Φ20mm*5mm discs in batches under 15Mpa molding pressure, process a Φ3mm hole in the center, and shape The finished cathode sheet was dehydrated at 100° C. for 24 hours, and sintered at 1300° C. for 4 hours in a hydrogen atmosphere to obtain a cathode sheet with a porosity of 19%. The sintered cathode sheets are connected in series with resistance wires to form cathode rods, the total amount of titanium dioxide cathode sheets is about 100g, and the distance between cathode and anode is 200mm. Protective gas argon flow rate is set to 5L / min, molten salt CaCl 2 The depth is 140mm, and the electrolysis is carried out at 950°C for 48h. The product is gray-black in color, and there is a small amount of gray dense layer inside. After testing, it is mainly intermediate products TiO, Ti 2 O ingredients. The product was crushed, pickled and clean...

example 2

[0021] Take 100g of titanium dioxide fine powder (≥99%), add 25g of 10% polyvinyl alcohol (PVA) aqueous solution, stir evenly, press it into Φ20mm*5mm discs in batches under 15Mpa molding pressure, process a Φ3mm hole in the center, and shape The finished cathode sheet was dehydrated at 130° C. for 48 hours, and sintered at 1100° C. for 4 hours in a hydrogen atmosphere to obtain a cathode sheet with a porosity of 25%. The sintered cathode sheets are connected in series with resistance wires to form cathode rods, the cathode rods are wrapped with stainless steel mesh, and the amount of titanium dioxide added is about 100g / group. The distance between cathode and anode is 200mm, the anode rod is connected to the motor through the transmission shaft, the speed is set at 120rpm, and the electrode configuration is as follows: figure 1 shown. Argon flow is set to 5L / min, molten salt CaCl 2 The control depth is 140mm, and the electrolysis is carried out at 950°C for 36h. In additio...

example 3

[0023] Take 100g of titanium dioxide fine powder (≥99%), mix with 10g of activated carbon powder (100-200 mesh), mix evenly, add 20g of 15% polyvinyl alcohol (PVA) aqueous solution, stir evenly, and batch under 20Mpa molding pressure Pressed into a disc body of Φ20mm*5mm, with a Φ3mm opening in the center, the formed cathode sheet was dehydrated at 120°C for 36 hours, and sintered at 1200°C for 4 hours in a hydrogen atmosphere to obtain a cathode sheet with a porosity of 35%. After sintering, the cathode sheet The SEM electron microscope topography of the film is shown in figure 2 . Connect the sintered cathode sheets in series with resistance wires to form a cathode rod. The total amount of titanium dioxide cathode sheets is about 100g, and the distance between cathode and anode is 200mm. The anode rod is connected to the motor through the transmission shaft, and the speed is set at 120rpm. figure 1 shown. Protective gas argon flow rate is set to 5L / min, molten salt CaCl ...

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Abstract

The invention provides an improved process for smelting metallic titanium by an electro-deoxidation method, which is characterized in that cathode plates used in the process are prepared by mixing titanium dioxide powder, a PVA binder with a carbon powder additive based on a certain ratio, and then sintering at a temperature of 1300 DEG C for 4-6 hours after forming in batch at a pressure of 15-20 MPa. The cathode plates are connected with cathode wires in series to form cathode bars. An anode adopts a rotating graphite anode; the graphite anode can reduce the deoxidation potential in the process of deoxidation; and a rotating electrode can weaken the anode effect on the surface and fast discharge reaction products, wherein the rotating speed is generally in the range of 60-200rpm. The improved process has the advantages of short production cycle, simple structure and low production cost of titanium sponge, and can be applied to manufacturing fields of other metals and alloy products..

Description

technical field [0001] The invention relates to a new electrolytic deoxidation technology capable of greatly improving the current efficiency in the process of molten salt electric deoxidation. Mainly aiming at the problem of low current efficiency in the electro-deoxidation titanium smelting process, through the modification of the electrode and the control of the deoxidation process, the electrolysis conditions that effectively promote the migration and removal of oxygen ions are obtained, the reaction time is shortened, and the current use efficiency is greatly improved. . The invention belongs to the fields of metallurgy, electrochemistry and the like. Background technique [0002] In the smelting process of metal titanium, the Kroll method is a method commonly used in the world today. The Kroll method mainly uses metal Mg to reduce TiCl 4 Process - Vacuum separation process to produce titanium metal. This process can produce high-purity titanium metal. However, due t...

Claims

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Application Information

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IPC IPC(8): C25C3/28
Inventor 郭占成蔡卓飞叶伟王中磊
Owner UNIV OF SCI & TECH BEIJING
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