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A kind of magnesia thermal reduction tiO2 prepares the method for metal titanium powder

A technology of metal titanium powder and magnesia, which is applied in the field of magnesia heat reduction of TiO2 to prepare metal titanium powder, can solve the problem of high oxygen content in titanium powder, achieve the effects of reducing titanium dioxide content, facilitating industrial expansion, and avoiding large consumption

Active Publication Date: 2018-09-11
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problem of high oxygen content in titanium powder prepared by the existing titanium dioxide magnesia thermal reduction method, the invention provides a magnesia thermal reduction TiO 2 Method for preparing metal titanium powder

Method used

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  • A kind of magnesia thermal reduction tiO2 prepares the method for metal titanium powder
  • A kind of magnesia thermal reduction tiO2 prepares the method for metal titanium powder

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Embodiment 1

[0035] Weigh 1 mol of titanium dioxide, 2 mol of magnesium powder, and 1.5 mol of magnesium chloride, mix them uniformly, and press under a pressure of 10 MPa to form a billet. The green compact was reacted in a vacuum atmosphere at 650°C for 2 hours, and the reaction product was leached with 4% hydrochloric acid, washed, filtered, and vacuum-dried to obtain metallic titanium powder. figure 2 The XRD pattern of the metal titanium powder prepared for the reaction shows that the oxygen content of the product is 0.62%.

Embodiment 2

[0037] Weigh 1 mol of titanium dioxide, 2.2 mol of magnesium powder, and 2.0 mol of calcium hydroxide, mix them uniformly, and press under a pressure of 20 MPa to form a billet. The green compact was reacted for 3 hours at 800°C under an argon atmosphere, and the reaction product was leached with 4.5% hydrochloric acid, washed, filtered, and vacuum-dried to obtain metal titanium powder with an oxygen content of 0.43%.

Embodiment 3

[0039] Weigh 1 mol of titanium dioxide, 3.5 mol of magnesium powder, and 4.0 mol of MgO, mix them uniformly, and press them into a billet under a pressure of 50 MPa. The compact was reacted for 2 hours at 1000°C under an argon atmosphere, and the reaction product was leached with 5% hydrochloric acid, washed, filtered, and vacuum-dried to obtain metallic titanium powder, with an oxygen content of 0.49%.

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Abstract

The invention discloses a method for preparing titanium metal powder through magnesiothermic reduction of TiO2 and belongs to the field of metal powder. The method includes the steps of A, taking titanium dioxide, magnesium powder and a diluent as raw materials which are evenly mixed prior to being pressed for molding to form a green blank; B, allowing the green blank to react within the temperature ranging from 400DEG C to 1400DEG C; C, removing MgO, the diluent and excess Mg via picking of diluted hydrochloric acid; D, performing filtering and vacuum drying to obtain the metal powder. With the method, the problem about high content of titanium powder oxygen in the prior art is solved, adding amount of the diluent is calculated according to heat generated from magnesium reduction of titanium dioxide, the heat released from reaction is absorbed through the diluent, heat absorption and releasing processes are balanced, magnesiothermic reduction of titanium dioxide is prompted, the content of titanium dioxide in products is reduced, oxygen content of the prepared metal power is reduced, and the method has the advantages of simple process, low energy consumption and low cost.

Description

technical field [0001] The invention relates to the field of preparing metal powder, in particular to a magnestic reduction of TiO 2 A method for preparing metal titanium powder. Background technique [0002] Titanium is a rare metal with a high melting point. It is widely used in aerospace, petrochemical, biomedical and other fields because of its high specific strength, good high and low temperature performance, strong corrosion resistance, and good bio-affinity. Titanium is extremely rich in the earth's crust, but in fact more than 90% of titanium resources are used to produce titanium dioxide, while titanium metal has not been used on a large scale, mainly because titanium is active at high temperatures and difficult to refine As a result, titanium is still listed as a rare metal. [0003] The Kroll method is a magnesothermic reduction of TiCl 4 The method of preparing titanium metal has become the most important titanium production method in the world since it came o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/20C22B34/12
Inventor 姚永林樊友奇赵卓
Owner ANHUI UNIVERSITY OF TECHNOLOGY