Industrial production method of titanium-containing soluble solid solution anode

A production method and soluble technology, which is applied in the field of titanium smelting, can solve the problems that the composition of soluble solid solution containing titanium is difficult to be accurately controlled, the anode cannot achieve long-term stable dissolution, and cannot continuously ensure electrical contact, etc., so as to shorten the production cycle and achieve simple and efficient production , to ensure the effect of accuracy

Inactive Publication Date: 2019-07-23
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Titanium is extremely rich in reserves in the earth's crust (0.44%, ranking 9th among all elements), but the production and sales of titanium are very limited (the global annual output is less than 200,000 tons)
The biggest problem with this method is: (1) After carbonization of cellulose or pitch additives at high temperature, additional carbon will be brought, which makes it difficult to precisely control the composition of titanium-containing soluble solid solutions; (2) TiO 2 When reacting with carbonaceous reducing agent, a large amount of gas will be released, which will cause many pores inside the anode after sintering, and the prepared anode will have a lower density and a higher resistivity.
Although this kind of anode structure is simple, the biggest problem is that except for anodes made of metal titanium and titanium alloys, anodes made of soluble solid solutions cannot achieve stable dissolution for a long time, because the anode continues to dissolve with electrolysis, and the soluble solid solution particles Good electrical contact cannot be guaranteed continuously, so the cell voltage rises rapidly after 1 to 3 hours of electrolysis and finally breaks the circuit, resulting in the inability to continue the electrolysis process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 50kg of titanium carbide (TiCxOy, x+y=1, melting point 1950-2050°C), heat up to 2400°C within half an hour under vacuum atmosphere to melt into a liquid state and magnetically stir for 10 minutes to a uniform state, keep the temperature for 20 minutes, Then pour the melt into a stainless steel mold that has been preheated to 1000°C and cast it into a cylindrical electrode of Φ200×350mm, and cool it to room temperature at a cooling rate of 240°C / hour under vacuum. The total production cycle takes 11 hours, including 11 hours for heating up and cooling down. The cooled anode is demoulded, the surface is polished to remove burrs, and the density of the anode measured by the Archimedes method is 4.9g / cm 3 , the room temperature resistivity of this anode was measured by the four-probe method to be 1.84μΩ·m.

[0026] With the anode as the electrode and the stainless steel plate as the cathode, pure titanium is produced by electrolysis in KCl-NaCl mixed molten salt at 7...

Embodiment 2

[0028]Weigh 25kg titanium carbide (TiC, melting point 3015°C) and 25kg titanium monoxide (TiO, melting point 1750°C), after mechanical mixing, heat up to 2400°C within half an hour under an argon atmosphere to melt into a liquid state and stir for 40min to Mix evenly, keep it warm for 20 minutes, then pour the melt into a stainless steel mold that has been preheated to 1000°C and cast it into a cylindrical electrode of Φ200×350mm, and cool it at a cooling rate of 240°C / hour under the protection of argon to room temperature. The total production cycle took 11.5 hours, including 11.5 hours for heating and cooling. The cooled anode is demolded, and the burrs are removed by surface grinding. The density of the anode measured by the Archimedes method is 4.7g / cm 3 , the room temperature resistivity of the anode was measured to be 1.96μΩ·m by four-probe method.

[0029] The anode is used as the electrode, and the stainless steel plate is used as the cathode. In KCl-NaCl mixed molte...

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Abstract

The invention relates to an industrial production method of a titanium-containing soluble solid solution anode, and belongs to the technical field of titanium smelting. The industrial production method comprises a melting and stirring step, a casting forming step, a cooling step and a shaping step. According to the industrial production method, titanium-containing soluble solid solution are adopted as raw materials, melting into the liquid state under the conditions that the temperature is higher than the melting point of the raw materials and under the protection of the inert atmosphere, andare fully stirring, then pouring the melt into a mold preheated to be 1000 DEG C or higher for casting forming, cooling under the protection of the inert atmosphere at a certain cooling speed, after the cooled anode is subjected to shaping treatment, and the cooled anode can be directly used for molten salt electrolysis to produce the metal titanium. The industrial production method of the titanium-containing soluble solid solution anode is simple in process, high in efficiency and low in cost, and the produced anode has the advantages of being high in density, good in conductivity, free of defects in the interior and the like. By adopting the anode for industrial production to carry out molten salt electrolysis to prepare the metal titanium, the anode can be stably dissolved for a long time, the anode without slag falling during the electrolysis process, and the electrochemical dissolution efficiency of the anode is 90% or higher.

Description

technical field [0001] The invention relates to the technical field of titanium smelting, in particular to an industrial production method of a titanium-containing soluble solid solution anode. Background technique [0002] Titanium metal has excellent physical, chemical and mechanical properties. Its density is about 60% of steel, but its specific strength is more than twice that of steel, and titanium metal has a high melting point, corrosion resistance and good biocompatibility, and is widely used in military industry, aerospace, chemical industry, medical treatment Implantation, electronic information and other fields, known as "future metal". Titanium is extremely abundant in the earth's crust (0.44%, ranking 9th among all elements), but the production and sales of titanium are very limited (the global annual output is less than 200,000 tons). At present, the mainstream production process of titanium metal is the Kroll method, that is, the magnesium reduction method. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/28
CPCC25C3/28
Inventor 焦树强朱骏王明涌田栋华
Owner UNIV OF SCI & TECH BEIJING
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