Method of preparing metal titanium powder through TiO2

A titanium metal powder and purpose technology, applied in the field of non-ferrous metal pyrometallurgy, can solve the problems of high purity of titanium powder, shorten the process of titanium metal powder, and the inability to achieve large-scale production and application, so as to shorten the reaction process and realize large-scale production. Scale production, easily controllable effects

Inactive Publication Date: 2013-02-13
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The above-mentioned technologies are currently unable to achieve large-scale production and application, but the present invention provides a new way of thinking, directly reducing the calcium obtained by the "Pidgeon method" in gaseous form to prepare metal titanium powder. The obtained titanium powder has high purity, and greatly shortens the process of preparing metal titanium powder, and also broadens the application field of metal calcium

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Mix 30g of analytically pure CaO with a particle size of less than 100 mesh and 10g of Al powder with a purity of ≥99wt.% at a mass ratio of 3:1, and make a Φ20×20mm block I under the condition of 6MPa;

[0028] (2) Industrial anhydrous CaCl with particle size less than 100 mesh 2 10g and pigment grade anatase TiO 2 10g is mixed evenly at a mass ratio of 1:1, and made into a Φ20×8mm block II under the condition of 2MPa;

[0029] (3) Place the two blocks obtained in steps (1) and (2) respectively in the same vacuum furnace, raise the temperature to 1100°C at a heating rate of 5K / min under a pressure of 3Pa, and keep the temperature for 10h to make the block I The generated calcium vapor is fully in contact with the block II, and after cooling with the furnace, the block II is taken out, crushed and ground to below 50 mesh;

[0030] (4) The reduced material obtained in step (3) was leached for 8 hours with a hydrochloric acid solution with a mass concentration of ...

Embodiment 2

[0033] (1) Mix 20 g of analytically pure CaO with a particle size of 90 mesh and Al powder with a purity ≥ 99% in a mass ratio of 3:2, and make a Φ30×12mm block I under the condition of 5MPa;

[0034] (2) Industrial anhydrous CaCl with a particle size of 90 mesh 2 2.5g and pigment grade anatase TiO 2 10g is mixed evenly at a mass ratio of 1:4, and made into a Φ20×5mm block II under the condition of 2MPa;

[0035] (3) Place the two blocks obtained in steps (1) and (2) respectively in the same vacuum furnace, raise the temperature to 1300°C at a heating rate of 10K / min under a pressure of 15Pa, and keep the temperature for 4 hours to make the block I The generated calcium vapor is fully in contact with the block II, and after cooling with the furnace, the block II is taken out, crushed and ground to below 50 mesh;

[0036] (4) The reduced material obtained in step (3) was leached for 9 hours with a hydrochloric acid solution with a mass concentration of 4.48% at a liquid-solid...

Embodiment 3

[0039] (1) Mix 30g of CaO with a particle size of less than 100 mesh and 15g of Al powder at a mass ratio of 2:1, and make a block I of Φ30×30mm under the condition of 4MPa;

[0040] (2) Anhydrous CaCl with particle size less than 100 mesh 2 5g and TiO 2 10g is mixed evenly with a mass ratio of 1:2, and made into a block II of Φ30×10mm under the condition of 2MPa;

[0041] (3) Place the two blocks obtained in steps (1) and (2) respectively in the same vacuum furnace, and raise the temperature to 1000°C at a heating rate of 15K / min under a pressure of less than 50Pa, and hold it for 8 hours to make the block The calcium vapor generated by material 1 fully contacts with block 2, and after cooling with the furnace, block II is taken out, crushed and ground to below 50 mesh;

[0042] (4) The reduced material obtained in step (3) is leached for 10 hours at a stirring speed of 300 r / min with a hydrochloric acid solution with a mass concentration of ≤5% at a liquid-solid mass rat...

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PUM

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Abstract

The invention provides a method of preparing metal titanium powder through TiO2. The method comprises the following steps of: uniformly mixing CaO with Al powder, and preparing the mixture to a block body I; uniformly mixing anhydrous CaCl2 with TiO2, and preparing the mixture to a block body II; putting the two block bodies in the same vacuum furnace, heating to 1000-1300 DEG C at a pressure smaller than 50 Pa, holding for 4-10h, taking out the block body II after the block body II is cooled with the furnace, and breaking and grinding the block body II; leaching out the reducing material through a hydrochloric acid solution; and filtering the lixivium and the solid, repeatedly washing the filter cake through distilled water and absolute ethyl alcohol, and drying the filter cake to obtain the metal titanium powder. The method disclosed by the invention is used for preparing the metal titanium powder by taking aluminum powder, calcium oxide and titanium dioxide as raw materials. The method saves the calcium condensation and remelting gasification processes, shortens the reaction procedures and saves the energy source; the reduction process is easy to control, the operation is simple, and the obtained product titanium powder can achieve the standard of national first class titanium powder; and the method can be used for realizing the mass scale production of the metal titanium powder.

Description

technical field [0001] The invention relates to the technical field of pyrometallurgy of nonferrous metals, in particular to a method for reducing TiO by metallotherm at high temperature. 2 Method for preparing titanium powder. Background technique [0002] Titanium has the advantages of high melting point, low density, high specific strength, anti-fatigue, anti-oxidation, and wear resistance. It has been widely used in aerospace, chemical industry, metallurgical industry and daily life. At present, the production of titanium metal in industry adopts the Krall method. Its production process consists of three parts: one is crude TiCl 4 Preparation; the second is crude TiCl 4 The third is the production of sponge titanium; then the sponge titanium is vacuum smelted to obtain dense metal titanium or the sponge titanium is hydrogenated, ball milled and then dehydrogenated to obtain metal titanium powder. It can be seen that the process is complicated, resulting in relatively...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/20C22B5/04C22B34/12
Inventor 徐宝强杨斌王东生刘大春贾金刚熊恒马文会戴永年曲涛邓勇李一夫蒋文龙王飞郁青春
Owner KUNMING UNIV OF SCI & TECH
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