Method for preparing vanadium-containing sponge titanium

A technology of vanadium-containing sponge and titanium sponge, which is applied in the field of titanium metallurgy, can solve the problems of easy volatilization of Al element and difficulty in controlling alloy composition, and achieve the effect of saving cost and simplifying the refining process

Inactive Publication Date: 2019-02-05
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, in the process of melting and casting ingots in the later stage, the vanadium element is easy to form segregation, and the Al element is easy to volatilize, which makes it difficult to control the alloy composition.

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0012] The preparation method of vanadium-containing titanium sponge of the present invention comprises the following steps:

[0013] (1) Using Panxi blast furnace slag after high-temperature carbonization-low temperature chlorination 4 (VOCl 3 content up to 0.4%), or crude TiCl after molten salt chlorination or boiling chlorination of titanium slag with high vanadium content 4 as raw material;

[0014] (2) The above raw materials do not need to undergo chemical vanadium removal treatment, only need to follow the conventional TiCl 4 In the refining process, high-boiling point impurities are distilled and low-boiling point impurities are rectified;

[0015] (3) High vanadium-containing TiCl after removal of impurities 4 Pass it into liquid alkali metal and form a titanium sponge containing vanadium through reduction, and vacuum distill to remove the chloride impurities to obtain titanium sponge containing vanadium.

[0016] The vanadium-containing titanium sponge prepared ...

Embodiment 1

[0019] Coarse TiCl with high vanadium content after high-temperature carbonization-low-temperature chlorination of Panxi blast furnace slag 4 (VOCl 3 content reaches 0.4%), remove FeCl through distillation tower 3 , AlCl 3 Wait for the high boiling point, and then remove SiCl through the rectification tower 4 and other low boiling point impurities to obtain vanadium-containing TiCl 4 According to the ratio of 4:1, add it into the liquid magnesium reactor equipped with argon protection, and control the temperature at 800 °C for 2 hours according to the process conditions for preparing sponge titanium by magnesia thermal reduction method; then through vacuum distillation, control the temperature at 1000 °C ℃, the vacuum degree reaches below 4Pa, and the time continues until the pressure is maintained below 4Pa for 10 hours, that is, the vanadium-containing sponge titanium is prepared. The vanadium-containing sponge titanium is added with a certain amount of vanadium and other...

Embodiment 2

[0021] Crude TiCl is produced by chlorinating titanium slag with high vanadium content through molten salt 4 (VOCl 3 Content reaches 0.3%), removes FeCl through distillation tower 3 , AlCl 3 Wait for the high boiling point, and then remove SiCl through the rectification tower 4 and other low boiling point impurities to obtain vanadium-containing TiCl 4 According to the ratio of 4:1, add it into the liquid magnesium reactor equipped with argon protection, and control the temperature at 800 °C for 2 hours according to the process conditions for preparing sponge titanium by magnesia thermal reduction method; then through vacuum distillation, control the temperature at 1000 °C ℃, the vacuum degree reaches below 4Pa, and the time continues until the pressure is maintained below 4Pa for 10 hours, that is, the vanadium-containing sponge titanium is prepared. The vanadium-containing sponge titanium is added with a certain amount of vanadium and other metals, and the vanadium-contai...

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Abstract

The invention belongs to the field of titanium metallurgy, and particularly relates to a method for preparing vanadium-containing sponge titanium. The invention aims to provide a method for preparingvanadium-containing sponge titanium, the method comprises the following steps that Ticl4 with high vanadium content without vanadium removal by aluminum is distilled, refining and impurity removal, then directly introducing into a magnesium metal melting system, vanadium-containing sponge titanium is prepared through alkali metal reduction and vacuum distillation process under the protection of inert gas, and the vanadium-containing titanium sponge can be used as a raw material for preparing vanadium-containing titanium alloy. According to the method for preparing vanadium-containing sponge titanium, high-valence vanadium elements in Ticl4 can be directly recycled, the refining process flow in the Ticl4 production process is simplified, a special raw material is provided for the vanadium-titanium alloy, and the method has an important practical significance on the development of the titanium alloy.

Description

technical field [0001] The invention belongs to the field of titanium metallurgy, and in particular relates to a method for preparing vanadium-containing sponge titanium. Background technique [0002] Titanium is a lightweight, high-strength, corrosion-resistant, non-toxic metal. Industrial pure titanium cannot be strengthened by heat treatment. It has low strength and good plasticity, and is mainly used as a corrosion-resistant structural material. Due to the role of alloying elements, titanium alloys present diverse characteristics, and often have higher strength, heat resistance and corrosion resistance than pure titanium. They are used in high-tech fields such as aviation, aerospace, ships, nuclear energy and military industry Wider use. Vanadium-containing titanium alloy can not only increase the strength of titanium alloy but also improve its performance due to the addition of vanadium. For example, the most widely used TC4 titanium alloy contains 6% Al and 4% V, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/12C22B9/02
CPCC22B34/1272C22B34/1295
Inventor 李开华盛卓李亮苗庆东
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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