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A kind of method for preparing titanium powder

A technology of titanium powder and titanium hydride, applied in the field of titanium processing, can solve the problems of slow reaction rate, high processing cost, low productivity, etc., and achieve the effects of short time, saving raw material cost and low cost.

Active Publication Date: 2017-11-10
PANZHIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] The traditional iodination method is mainly used in industrial production that does not require high purity of titanium. The existing problems are: a. The reaction is carried out on the resistance wire, which limits the amount of crude titanium in the reaction vessel, the reaction rate is slow, and the production efficiency is low; b. . Changes in the deposition layer on the resistance wire, resulting in difficulty in temperature control, and even the resistance wire is blown; c. Susceptible to contamination by impurities in the reaction vessel
The disadvantages of this process are low productivity, large equipment investment and high processing cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] Preparation of titanium hydride: Put the titanium sponge into the hydrogenation furnace, and then use argon to ventilate the hydrogenation furnace, and then evacuate to 2×10 -3 Pa, raise the temperature to 300°C and hold it for 1 hour, then continue to raise the temperature to 450°C; then pass in hydrogen and control the pressure to 3.5MPa, after a period of reaction, when the pressure is less than 3.0MPa, continue to pass in hydrogen until the pressure reaches 3.5MPa again , repeated 3 times (30min), when the pressure no longer drops, lower the temperature and remove the remaining hydrogen, and take out the titanium hydride;

[0096] Molten salt pretreatment: Add 2kg of equimolar mixture of NaCl and KCl into the electrolytic cell, put the cathode titanium tube and anode basket, and add the above-mentioned titanium hydride particles into the anode basket, vacuumize and raise the temperature to 200°C. 2h to dry it;

[0097] Electrolyzer dehydrogenation and electrolysis:...

Embodiment 2

[0100] Preparation of titanium hydride: Put the titanium sponge into the hydrogenation furnace, then use argon to ventilate the hydrogenation furnace, and then vacuumize to 5×10 -3 Pa, raise the temperature to 300°C and hold it for 1 hour, then continue to raise the temperature to 450°C; then pass in hydrogen and control the pressure to 3.5MPa, after a period of reaction, when the pressure is less than 3.0MPa, continue to pass in hydrogen until the pressure reaches 3.5MPa again , repeated 3 times (45min), when the pressure no longer drops, lower the temperature and remove the remaining hydrogen, and take out the titanium hydride;

[0101] Molten salt pretreatment: Add 2 kg of a mixture of NaCl and KCl with a molar ratio of 2:3 into the electrolytic cell, put the cathode titanium tube and the anode basket, and add the above-mentioned titanium hydride particles into the anode basket, vacuumize and heat up Dry it at a constant temperature of 200°C for 2 hours;

[0102] Electroly...

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Abstract

The invention belongs to the technical field of titanium processing, and particularly relates to a method for preparing titanium powder. The method for preparing the titanium powder comprises the following steps that A, titanium hydride is prepared, i.e., sponge titanium and hydrogen sufficiently react to prepare the titanium hydride; B, electrolysis is conducted, i.e., 1, the titanium hydride serves as an anode, metal titanium serves as a cathode, and the anode and the cathode are put into an electrolytic cell; 2, vacuumizing is conducted after fused salt is added into the electrolytic cell, hydrogen in the titanium hydride is removed by heating, the fused salt is made to melt, and the fused salt is the mixture of sodium chloride and potassium chloride; 3, TiCl4 is added into the electrolytic cell, and a power source is connected for electrolysis; and C, postprocessing is conducted, i.e., cathode deposits are obtained, and the titanium powder is obtained after acid pickling, washing and drying. The method reduces the work procedures, shortens the electrolysis time, saves energy resources and improves the current efficiency; the prepared titanium powder is high in purity and fine in particle size; a better selection method is provided for preparation of the titanium powder.

Description

technical field [0001] The invention belongs to the technical field of titanium processing, and in particular relates to a method for preparing titanium powder. Background technique [0002] The preparation methods of high-purity titanium in the prior art include two categories: physical method and chemical refining method. Physical methods mainly include electron beam melting method, segregation method, high vacuum melting method, vacuum distillation method, electromigration method, light excitation refining method, etc. , Chemical refining methods mainly include molten salt electrolysis, iodide thermal decomposition, chloride thermal decomposition, displacement precipitation and solvent extraction. [0003] 1. The main methods used to prepare high-purity titanium in industrial production include the Krall method, iodination method, molten salt electrolysis method, and electron beam smelting and refining method. [0004] 1. Claure method (magnesia thermal reduction method)...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C5/04
CPCC25C3/28C25C5/04
Inventor 廖先杰赖奇钟璨宇张树立唐锐杨绍利侯静李军吴恩辉黄平李俊翰罗金华
Owner PANZHIHUA UNIV