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Process and device for producing high-oxygen sponge titanium

A high-oxygen sponge and process technology, applied in the field of non-ferrous metal smelting, can solve problems such as not a complete solution, uneven chemical composition, segregation of titanium ingot composition, etc., to improve uniformity and quality stability, and avoid composition segregation and localization. Defects, the effect of improving performance

Active Publication Date: 2012-12-12
朝阳金达钛业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the melting point of the alloy raw material is higher than the melting point of the smelted alloy, the chemical composition will be uneven due to incomplete melting of the alloy raw material, and the melting point of titanium dioxide is higher than that of titanium, so adding titanium dioxide will cause uneven addition, resulting in the composition of the titanium ingot Segregation, while adding titanium dioxide will also produce hard α defects. The location of such defects is often a small, discontinuous area, which is easy to cause stress concentration and cause harm
In order to eliminate the above defects, three times of melting are usually required to obtain better composition uniformity, but three times of remelting are often not a complete solution

Method used

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  • Process and device for producing high-oxygen sponge titanium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: Taking a five-ton reduction furnace as an example, a total of 20 tons of titanium tetrachloride needs to be added. After adding 2 tons of titanium tetrachloride, add 1.8kg of high-purity oxygen to the titanium tetrachloride high-level tank, and supplement argon to ensure the pressure in the high-level tank. Keep it at 0.03~0.1MPa, and use the gas-liquid mixing pump to mix the gas and liquid in the high level tank. Ensure that titanium tetrachloride fully absorbs oxygen. Titanium tetrachloride is fed into the reactor through the feed pipe, and magnesium in the reactor reduces titanium tetrachloride to obtain titanium sponge.

[0024] The pressure in the reactor is kept between 0.02-0.05MPa, the temperature of the melt in the reactor is controlled between 720-840°C, and argon is added to maintain the pressure of the high-level tank when the pressure of the high-level tank is lower than 0.03MPa.

[0025] The main indicators for finally obtaining titanium sp...

Embodiment 2

[0026] Example 2: Taking a five-ton reduction furnace as an example, a total of 20 tons of titanium tetrachloride needs to be added. After adding 2 tons of titanium tetrachloride, add 2.35kg of high-purity oxygen to the titanium tetrachloride head tank, and supplement argon to ensure the pressure in the head tank. Keep it at 0.03~0.1MPa, and use the gas-liquid mixing pump to mix the gas and liquid in the high level tank. Ensure that titanium tetrachloride fully absorbs oxygen. Titanium tetrachloride is fed into the reactor through the feed pipe, and magnesium in the reactor reduces titanium tetrachloride to obtain titanium sponge.

[0027] The pressure in the reactor is kept between 0.02-0.05MPa, the temperature of the melt in the reactor is controlled between 720-840°C, and argon is added to maintain the pressure of the high-level tank when the pressure of the high-level tank is lower than 0.03MPa.

[0028] The main indicators for finally obtaining titanium sponge are: oxy...

Embodiment 3

[0029] Example 3: Taking a five-ton reduction furnace as an example, a total of 20 tons of titanium tetrachloride needs to be added. After adding 2 tons of titanium tetrachloride, add 6.2kg of high-purity carbon dioxide to the high-level tank of titanium tetrachloride, and supplement argon to ensure the pressure in the high-level tank. Keep it at 0.03~0.1MPa, and use the gas-liquid mixing pump to mix the gas and liquid in the high level tank. Ensure that titanium tetrachloride fully absorbs oxygen. Titanium tetrachloride is fed into the reactor through the feed pipe, and magnesium in the reactor reduces titanium tetrachloride to obtain titanium sponge.

[0030] The pressure in the reactor is kept between 0.02-0.05MPa, the temperature of the melt in the reactor is controlled between 720-840°C, and argon is added to maintain the pressure of the high-level tank when the pressure of the high-level tank is lower than 0.03MPa.

[0031] The main indicators for finally obtaining ti...

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Abstract

The invention provides a process and a device for producing high-oxygen sponge titanium through adding oxygen directly in a smelting process of the sponge titanium. The oxygen content of titanium tetrachloride is controlled to control the oxygen content of the sponge titanium stably. According to requirements for the oxygen content by a titanium alloy, titanium dioxide is not needed to add during a smelting process of the sponge titanium for production of the sponge titanium with satisfactory oxygen content, therefore composition segregation and local defects caused by addition of the titanium dioxide are avoided, the alloy mixing difficulty is reduced simultaneously, uniform components and stable quality of titanium ingots are guaranteed, and performances of titanium alloy materials are improved effectively.

Description

technical field [0001] The invention relates to the field of non-ferrous metal smelting, in particular to a process and a device for producing high-oxygen sponge titanium. Background technique [0002] During the smelting process of titanium alloy, titanium dioxide needs to be added to increase the strength of titanium alloy. When the melting point of the alloy raw material is higher than the melting point of the smelted alloy, the chemical composition will be uneven due to incomplete melting of the alloy raw material, and the melting point of titanium dioxide is higher than that of titanium, so adding titanium dioxide will cause uneven addition, resulting in the composition of the titanium ingot Segregation, while adding titanium dioxide will also produce hard α defects. The location of such defects is often a small, discontinuous area, which is easy to cause stress concentration and cause harm. In order to eliminate the above defects, three times of melting are usually r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/12
Inventor 张军王继宪张金宝
Owner 朝阳金达钛业股份有限公司
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