Method for preparing titanium ingot from high-oxygen titanium recovery material

A recycled material and high-oxygen technology, applied in the direction of improving process efficiency, etc., can solve the problems of not adding too much high-oxygen titanium chips and low utilization rate of titanium chips, and achieve the effect of low cost, reduced cost and high purity

Active Publication Date: 2019-11-22
PANZHIHUA UNIV
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition amount of high-oxygen titanium chips should not be too much, and the utilization rate of titanium chips is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Add 50 kg of sprue high-oxygen titanium reclaimed material formed in the titanium casting process with an oxygen content of 0.31 wt % and a carbon content of 0.038 % into the hopper, and put the hopper into a resistance furnace to be heated. Open the nitrogen tank first, and purge the resistance furnace with nitrogen for 20 minutes. The hydrogen generator is then turned on and the hydrogen is stored in the hydrogen storage tank. Pass hydrogen for 20 minutes to ensure that the gas remaining in the resistance furnace is exhausted. One end of the resistance furnace is then left sealed. Make the hydrogen pressure reach 0.5MPa. Turn on the controller of the resistance furnace to adjust the temperature to a temperature of 510° C., and the reaction time is 10 minutes. After the time is up, stop heating the resistance furnace, and cool for 10 hours under the condition of feeding hydrogen to obtain a hydrogenated titanium block. The hydrogenated titanium block has a hydrogen...

Embodiment 2

[0055] Add 50 kg of sprue high-oxygen titanium recovery material formed in the titanium casting process with an oxygen content of 0.33 wt % and a carbon content of 0.039 % into the hopper, and put the hopper into a resistance furnace to be heated. Open the nitrogen tank first, and purge the resistance furnace with nitrogen for 20 minutes. The hydrogen generator is then turned on and the hydrogen is stored in the hydrogen storage tank. Pass hydrogen for 20 minutes to ensure that the gas remaining in the resistance furnace is exhausted. One end of the resistance furnace is then left sealed. Make the hydrogen pressure reach 0.5MPa. Turn on the resistance furnace controller to adjust the temperature to 500°C, and the reaction time is 20 minutes. After the time is up, stop heating the resistance furnace, and cool for 10 hours under the condition of feeding hydrogen to obtain a hydrogenated titanium block. The hydrogenated titanium block has a hydrogen content of 3.6%.

[0056]...

Embodiment 3

[0059] Add 25 kg of sprue high-oxygen titanium reclaimed material with an oxygen content of 0.18wt% and a carbon content of 0.029% formed in the titanium casting process into the hopper, and put the hopper into a resistance furnace to be heated. Open the nitrogen tank first, and purge the resistance furnace with nitrogen for 20 minutes. The hydrogen generator is then turned on and the hydrogen is stored in the hydrogen storage tank. Pass hydrogen for 20 minutes to ensure that the gas remaining in the resistance furnace is exhausted. One end of the resistance furnace is then left sealed. Make the hydrogen pressure reach 0.5MPa. Turn on the resistance furnace controller to adjust the temperature to the required temperature, the hydrogenation temperature is 520°C; the reaction time is 20 minutes. After the time is up, stop heating the resistance furnace, and cool for 5 hours under the condition of feeding hydrogen to obtain a hydrogenated titanium block. The hydrogenated tita...

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Abstract

The invention relates to a method for preparing a titanium ingot from a high-oxygen titanium recovery material and belongs to the technical field of preparation of a titanium cast ingot. The method for preparing the titanium ingot from the high-oxygen titanium recovery material comprises the following steps: A, performing heating reaction on the high-oxygen titanium recovery material in hydrogen atmosphere for 5 to 30 minutes and cooling to obtain a hydrogenated titanium block, wherein the reaction temperature is 470 to 550 DEG C and the pressure intensity of the hydrogen atmosphere is 0.2 to1 MPa; and B, crushing the hydrogenated titanium block, mixing with a titanium material, smelting in an electron beam cold bed smelting furnace and cooling to obtain the titanium ingot, wherein the mass ratio of the high-oxygen titanium recovery material to the titanium material is 1:(1-4). According to the method of the invention, the adding ratio of high-oxygen titanium is high and the utilization rate of titanium scrap is slightly high. Titanium hydride obtained through preparation is directly mixed with sponge titanium, heating, and dehydrogenation and smelting are conducted integrally bythe electron beam furnace, so cost is low.

Description

technical field [0001] The invention relates to a method for preparing titanium ingots from recycled high-oxygen titanium materials, and belongs to the technical field of titanium ingot preparation. Background technique [0002] Titanium and titanium alloys have a series of excellent comprehensive properties such as low density, high strength and good mechanical properties, and their application requirements in aerospace are increasing day by day. According to the FAA report, many catastrophic accidents in the history of aviation flight were caused by metallurgical defects in titanium alloy parts. [0003] At present, the methods of producing titanium products are mainly vacuum consumable electric arc furnace melting and shell melting furnace melting. The above method melts titanium liquid and pours it into a mold made of graphite or oxygen-containing materials, so a large amount of wall material and runner material will be produced. These wall materials and runner material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B34/12
CPCC22B7/001C22B34/1227Y02P10/20
Inventor 赖奇李亮廖先杰彭富昌钟璨宇刘翘楚
Owner PANZHIHUA UNIV
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