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Method and device for continuously preparing high-purity titanium through oxide fusion electrolysis-vacuum rectification

A technology of molten electrolysis and vacuum distillation, which is applied in the electrolysis process, electrolysis components, electrodes, etc., can solve the problems of high energy consumption and low production efficiency of electrolysis, and achieve the effects of wide sources, low production cost and energy consumption reduction

Active Publication Date: 2019-11-05
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the electrolysis energy consumption of this method is too high, and the two-step electrolysis is adopted, the production efficiency is low, and the product needs to be further processed

Method used

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  • Method and device for continuously preparing high-purity titanium through oxide fusion electrolysis-vacuum rectification

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step 1: adopt tin as cathode, iron-chromium alloy as anode, titanium-containing oxide slag (25.35wt% CaO, 14.83wt% Al 2 o 3 , 7.84wt% MgO, 23.41wt% SiO 2 and 28.57wt% TiO 2 ) is the electrolyte. Raise the temperature to 1550°C, pre-melt for 3 hours, then lower the anode into the electrolyte, and simultaneously energize the anode and cathode to start constant current electrolysis with a current density of 3A cm -2 ; During the electrolysis process, argon is passed through the electrolysis furnace for protection.

[0025] Step 2: Monitor the titanium ion activity in the titanium-containing oxide slag and the tin-titanium alloy. When the titanium ion activity in the titanium-containing oxide slag is less than 8%, open the slag outlet to discharge the slag, and open the slag delivery port to send the slag at the same time. Ensure that the titanium ion activity in the titanium-containing oxide slag is between 6 and 80%; at the same time, when the titanium ion activity in...

Embodiment 2

[0028] Step 1: Using antimony as the cathode, graphite as the anode, titanium oxide slag (19.54wt% CaO, 21.46wt% Al 2 o 3 , 4.21wt% MgO, 11.09wt% SiO 2 ,16.32wt%TiO 2 and 27.38 wt% CaF 2 ) is the electrolyte. Raise the temperature to 1400°C, pre-melt for 2 hours, then lower the anode into the electrolyte, and simultaneously energize the anode and cathode to start constant current electrolysis with a current density of 6A cm -2 ; During the electrolysis process, argon is passed through the electrolysis furnace for protection.

[0029] Step 2: Monitor the titanium ion activity in the titanium-containing oxide slag and the antimony-titanium alloy cathode. When the titanium ion activity in the titanium-containing oxide slag is less than 8%, open the slag outlet to discharge the slag, and simultaneously open the slag delivery port to send the slag. Always ensure that the titanium ion activity in the titanium-containing oxide slag is between 6 and 80%; at the same time, when th...

Embodiment 3

[0032] Step 1: adopt lead-bismuth alloy as cathode, iron-chromium alloy as anode, titanium oxide slag (32.11wt% CaO, 22.34wt% Al 2 o3 , 13.67wt% MgO, 6.21wt% SiO 2 and 25.67wt% TiO 2 ) is the electrolyte. Raise the temperature to 1500°C, perform pre-melting for 1 hour, then lower the anode into the electrolyte, and simultaneously energize the anode and cathode to start electrolysis at a constant voltage of 5V; during the electrolysis process, helium is passed through the electrolysis furnace for protection.

[0033] Step 2: Monitor the titanium ion activity in the titanium-containing oxide slag and lead-bismuth-titanium alloy cathode. When the titanium ion activity in the titanium-containing oxide slag is less than 8%, open the slag outlet for slag discharge, and open the slag delivery port to send slag at the same time , always ensure that the titanium ion activity in the titanium-containing oxide slag is between 6 and 80%; at the same time, when the titanium ion activity i...

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Abstract

The invention relates to a method and device for continuously preparing high-purity titanium through oxide fusion electrolysis-vacuum rectification, and belongs to the field of electrochemical metallurgy and vacuum metallurgy. The process comprises the following steps of adding a metal or alloy cathode and a titanium-containing oxidation slag electrolyte into an electrolytic furnace, and using aninert electrode or graphite as an anode; carrying out electrolyzation under a high-temperature condition, feeding the titanium-containing alloy obtained through electrolysis into a rectification furnace for rectification, and separating the titanium from the metal or alloy cathode; and enabling the metal or alloy cathode to return to the rectification furnace to realize circulation through evaporation. According to the method and the device, it is realized that the high-purity titanium is continuously prepared through oxide fusion electrolysis-vacuum rectification by controlling the rectification furnace and the electrolytic furnace in the whole operation process, the method and the device accord with green metallurgy requirements, utilize an electrochemical metallurgy and vacuum metallurgy principle to continuously and comprehensively recover metallurgical secondary resources, and have the advantages of being low in energy consumption, simple to operate, short in flow and the like.

Description

technical field [0001] The invention relates to a method and equipment for continuous preparation of high-purity titanium by oxide melting electrolysis-vacuum rectification, belonging to the fields of electrochemical metallurgy and vacuum metallurgy. Background technique [0002] Due to its high specific strength, corrosion resistance and good biocompatibility, titanium is considered as a future metal and is widely used in aerospace, petrochemical, nuclear power, ships, submarines and biomedicine. It accounts for about 0.42% in the earth's crust, which is 16 times the total amount of copper, nickel, lead, and zinc. However, most titanium-containing minerals are composite ores, which are difficult to directly smelt. At present, the Kroll method is the main industrial production method of titanium. While producing titanium, this method has high requirements for intermediates such as titanium tetrachloride and magnesium, and has strict requirements for the airtightness and pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/28C25C7/02C22B9/02C22B34/12
CPCC22B9/02C22B34/1295C25C3/28C25C7/025
Inventor 焦树强蒲正浩王明涌焦汉东
Owner UNIV OF SCI & TECH BEIJING
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