CN110484737B - Method for preparing titanium ingot by using high-oxygen titanium reclaimed material - Google Patents

Method for preparing titanium ingot by using high-oxygen titanium reclaimed material Download PDF

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CN110484737B
CN110484737B CN201910949046.0A CN201910949046A CN110484737B CN 110484737 B CN110484737 B CN 110484737B CN 201910949046 A CN201910949046 A CN 201910949046A CN 110484737 B CN110484737 B CN 110484737B
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titanium
oxygen
reclaimed
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smelting
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CN110484737A (en
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赖奇
李亮
廖先杰
彭富昌
钟璨宇
刘翘楚
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Panzhihua University
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Panzhihua University
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B34/00—Obtaining refractory metals
    • C22B34/10—Obtaining titanium, zirconium or hafnium
    • C22B34/12—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08
    • C22B34/1218—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08 obtaining titanium or titanium compounds from ores or scrap by dry processes
    • C22B34/1227—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08 obtaining titanium or titanium compounds from ores or scrap by dry processes using an oxygen containing agent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/001—Dry processes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Abstract

The invention relates to a method for preparing a titanium ingot by using a high-oxygen titanium reclaimed material, belonging to the technical field of titanium ingot preparation. The method for preparing the titanium ingot by using the high-oxygen titanium reclaimed material comprises the following steps: A. heating the high-oxygen titanium reclaimed material in a hydrogen atmosphere for 5-30 minutes for reaction, and cooling to obtain a hydrogenated titanium block; wherein the reaction temperature is 470-550 ℃, and the pressure of the hydrogen atmosphere is 0.2-1 MPa; B. crushing the hydrogenated titanium block, mixing the crushed hydrogenated titanium block with a titanium material, smelting in an electron beam cold hearth smelting furnace, and cooling to obtain a titanium ingot; wherein the mass ratio of the high-oxygen titanium reclaimed material to the titanium material is 1: 1-4. The method has high titanium oxide adding proportion and high titanium scrap utilization rate. The invention directly mixes the titanium hydride and the titanium sponge, and uses the electron beam furnace to heat, dehydrogenate and smelt into a whole, thereby having low cost.

Description

Method for preparing titanium ingot by using high-oxygen titanium reclaimed material
Technical Field
The invention relates to a method for preparing a titanium ingot by using a high-oxygen titanium reclaimed material, belonging to the technical field of titanium ingot preparation.
Background
Titanium and titanium alloy have a series of excellent comprehensive properties such as small density, high strength and good mechanical properties, and the application demand on aerospace is increasing day by day. According to the report of the Federal aviation administration in the United states, many catastrophic accidents occurred in the aviation flight history and were caused by metallurgical defects of titanium alloy parts.
The existing methods for producing titanium products mainly comprise vacuum consumable arc furnace smelting and skull furnace smelting, and the titanium smelting liquid is poured into a mold made of graphite or oxygen-containing materials, so that a large amount of wall materials and pouring channel materials are generated, and the wall materials and the pouring channel materials contain a large amount of oxygen and carbon to produce oxides and carbides of titanium. The melting point of the oxide and carbide of titanium is high, so that the casting waste is extremely difficult to recycle by the conventional vacuum consumable arc melting method for recycling titanium materials. In addition, the vacuum consumable arc melting method needs to mix and press the recycled titanium material and the titanium sponge into an electrode before melting, the addition amount of titanium chips is 10-20% at most, and the utilization rate of the titanium chips is low. Therefore, the wall material and the pouring channel material can only be used as auxiliary materials of fireworks.
The existing high-oxygen titanium deoxidizes to obtain titanium hydride, and the titanium hydride is heated to more than 680 ℃ for dehydrogenation, but the process is troublesome and the cost is high.
The electron beam cold bed smelting furnace is generally divided into three working areas, namely a melting area, a refining area and a crystallization area. In the melting zone, the focused high-energy electron beam bombards the furnace charge to melt the furnace charge, then the liquid metal flows to a refining zone (a water-cooled copper bed), high-density and low-density impurities are eliminated by means of dissolution separation, specific gravity separation and the like under the action of the electron beam, and finally the refined metal liquid flows into a crystallizer through an overflow port.
Patent application No. 201710333573X discloses a method for preparing TA1 titanium ingots using titanium scrap, which comprises the steps of: respectively sequentially crushing, cleaning, drying and magnetically separating the low-oxygen cold-processed titanium chips, the high-oxygen cold-processed titanium chips and the high-oxygen titanium chips; the low-oxygen cold-processed titanium chips are chips obtained by cold processing of titanium ingots with the oxygen content of less than 0.08 wt% under a vehicle, and the oxygen content of the low-oxygen cold-processed titanium chips is 0.10 wt% -0.12 wt%; the high-oxygen cold-processing titanium chips are chips under a titanium ingot cold-processing vehicle with the oxygen content of 0.08-0.20 wt%, and the oxygen content in the high-oxygen cold-processing titanium chips is 0.24-0.38 wt%; the high-oxygen titanium chips are chips obtained by machining the oxidized surface of a titanium blank after heating forging or heat treatment, and the oxygen content in the high-oxygen titanium chips is 0.22-0.32 wt%; step two, uniformly mixing one of the high-oxygen cold-processed titanium chips and the high-oxygen titanium chips subjected to the magnetic separation treatment in the step one with the low-oxygen cold-processed titanium chips to form a mixture; the quality of the high-oxygen cold-processing titanium chips is not more than 40% of the quality of the mixture, and the quality of the high-oxygen titanium chips is not more than 30% of the quality of the mixture; and step three, feeding the low-oxygen cold-processed titanium chips subjected to the magnetic separation treatment in the step one or the mixture in the step two into an electron beam cold bed smelting furnace through a screw feeder for smelting to obtain TA1 titanium ingots. The method prepares the qualified TA1 titanium ingot by using the titanium scrap material, greatly improves the use amount of the titanium scrap material, reduces the production cost, does not need to press and weld electrodes before smelting the titanium scrap material, has simple process and controllable process, and is easy to realize industrial production. However, the addition amount of the high-oxygen titanium chips is still not too much, and the utilization rate of the titanium chips is low.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for preparing a titanium ingot by using a high-oxygen titanium reclaimed material, wherein the method has high addition proportion of high-oxygen titanium scraps.
In order to solve the technical problem of the invention, the method for preparing the titanium ingot by using the high-oxygen titanium reclaimed material comprises the following steps:
A. heating the high-oxygen titanium reclaimed material in a hydrogen atmosphere for 5-30 minutes for reaction, and cooling to obtain a hydrogenated titanium block; wherein the reaction temperature is 470-550 ℃, the pressure of the hydrogen atmosphere is 0.2-1 MPa, the reaction temperature is preferably 490-530 ℃, and more preferably 505-530 ℃;
B. crushing the hydrogenated titanium block, mixing the crushed titanium block with a titanium material, smelting the titanium block in an electron beam cold hearth smelting furnace, and cooling the titanium block to obtain a titanium ingot; wherein the mass ratio of the high-oxygen titanium reclaimed material to the titanium material is 1: 1-4, preferably 1: 1-1.4; the titanium material is preferably at least one of titanium sponge, titanium blocks and titanium bars.
The high-oxygen titanium reclaimed material is titanium-containing reclaimed material formed in the titanium processing process, and the reclaimed material also contains titanium oxide and/or titanium carbide, such as wall material, runner material and the like formed in the titanium casting process.
The existing high-oxygen titanium deoxidizes to obtain titanium hydride, and the titanium hydride is heated to more than 680 ℃ for dehydrogenation, which is too troublesome. The cost is still high. Therefore, hydrogenated titanium blocks are directly mixed with titanium sponge, and heating, dehydrogenation and smelting are integrally carried out by using an electron beam furnace, so that the cost is low.
Preferably, the oxygen content of the high-oxygen titanium reclaimed material is 0.08-0.40 wt%; preferably 0.15 to 0.35 wt%; the carbon content of the high-oxygen titanium reclaimed material is preferably 0.002-0.6 wt%;
preferably, the high-oxygen titanium reclaimed material is a wall material and/or a pouring channel material formed in the titanium casting process.
Preferably, the hydrogenated titanium block has a hydrogen content of 1.2 to 3.8 wt%.
Preferably, the step A is carried out in a tubular furnace, the high-oxygen titanium reclaimed material is firstly placed in the tubular furnace, the tubular furnace is purged with nitrogen for 10-20 min, hydrogen is introduced for 15-20 min, and then the mixture is heated for reaction.
The existing hydrogenation furnace has high price and high requirements on temperature and sealing conditions. For this reason, low cost deoxidation of titanium for high oxygen content is critical. The invention adopts the tube furnace for direct hydrogenation, and has low cost of the method and the device and good deoxidation effect.
Preferably, the cooling is preferably vacuum cooling for 3-6 h.
Preferably, the hydrogenated titanium block in the step B is crushed and mixed with a titanium material to form: and crushing the hydrogenated titanium blocks and the titanium materials through a screw feeder and conveying the crushed titanium blocks and the titanium materials into an electron beam cold bed smelting furnace.
Preferably, the smelting in the step B adopts a cold cathode electron gun; the degree of vacuum of the melting is preferably 5.0X 10-3Pa～10Pa。
The cold cathode electron gun is filled with hydrogen, so that the recycled titanium material containing hydrogen does not pollute the smelting chamber.
Preferably, the smelting method in the step B comprises the following steps: the power of an electron gun in a smelting area of the electron beam cold bed smelting furnace is controlled to be 60-400 kW, the preferred power is 80-400 kW, the power of an electron gun in a refining area is 80-500 kW, and the power of an electron gun in a solidification area is 50-300 kW.
Preferably, the purity of the titanium ingot in the step B is more than 99.73%.
Preferably, the oxygen content is 0.11 to 0.18 wt%, and the hydrogen content is 0.014% or less.
Has the advantages that:
a. the method has high titanium oxide adding proportion and high titanium scrap utilization rate.
b. The invention directly mixes the hydrogenated titanium block obtained by preparation with the titanium sponge, and uses an electron beam furnace to heat, dehydrogenate and smelt the titanium sponge into a whole, thereby having low cost.
c. The invention adopts a cold cathode electron gun, and the reclaimed titanium containing hydrogen does not pollute the smelting chamber.
d. The product prepared by the method has high purity, and the purity of the titanium ingot is over 99.73 percent.
e. The invention adopts the reclaimed materials, and the cost is reduced by more than 15 percent compared with the cost of only using the titanium sponge.
Detailed Description
In order to solve the technical problem of the invention, the method for preparing the titanium ingot by using the high-oxygen titanium reclaimed material comprises the following steps:
A. heating the high-oxygen titanium reclaimed material in a hydrogen atmosphere for 5-30 minutes for reaction, and cooling to obtain a hydrogenated titanium block; wherein the reaction temperature is 470-550 ℃, the pressure of the hydrogen atmosphere is 0.2-1 MPa, the reaction temperature is preferably 490-530 ℃, and more preferably 505-550 ℃;
B. crushing the hydrogenated titanium block, mixing the crushed titanium block with a titanium material, smelting the titanium block in an electron beam cold hearth smelting furnace, and cooling the titanium block to obtain a titanium ingot;
the mass ratio of the high-oxygen titanium reclaimed material to the titanium material is 1: 1-4, preferably 1: 1-1.4; the titanium material is preferably at least one of titanium sponge, titanium blocks and titanium bars.
The high-oxygen titanium reclaimed material is titanium-containing reclaimed material formed in the titanium processing process, and the reclaimed material also contains titanium oxide and/or titanium carbide, such as wall material, runner material and the like formed in the titanium casting process.
The existing high-oxygen titanium deoxidizes to obtain titanium hydride, and the titanium hydride is heated to more than 680 ℃ for dehydrogenation to obtain pure titanium granules, so that the cost is high, the process flow is long, and the pure titanium granules cannot be directly utilized. Therefore, hydrogenated titanium blocks are directly mixed with titanium sponge, and heating, dehydrogenation and smelting are integrally carried out by using an electron beam furnace, so that the cost is low.
Preferably, the oxygen content of the high-oxygen titanium reclaimed material is 0.08-0.40 wt%; preferably 0.15 to 0.35 wt%; the carbon content of the high-oxygen titanium reclaimed material is preferably 0.002-0.6 wt%;
preferably, the high-oxygen titanium reclaimed material is a wall material and/or a pouring channel material formed in the titanium casting process.
Preferably, the hydrogenated titanium block has a hydrogen content of 1.2 to 3.8 wt%.
Preferably, the step A is carried out in a tubular furnace, the high-oxygen titanium reclaimed material is firstly placed in the tubular furnace, the tubular furnace is purged with nitrogen for 10-20 min, hydrogen is introduced for 15-20 min, and then the mixture is heated for reaction.
The existing hydrogenation furnace has high price and high requirements on temperature and sealing conditions. For this reason, low cost deoxidation of titanium for high oxygen content is critical. The invention adopts the tube furnace for direct hydrogenation, and has low cost of the method and the device and good deoxidation effect.
Preferably, the cooling in the step A is vacuum cooling for 2-10 hours to room temperature; and the cooling in the step B is preferably carried out for more than 3 hours in vacuum. Preferably, the cooling is preferably vacuum cooling for 3-6 h.
Preferably, the hydrogenated titanium block in the step B is crushed and mixed with a titanium material to form: and crushing the hydrogenated titanium blocks and the titanium materials through a screw feeder and conveying the crushed titanium blocks and the titanium materials into an electron beam cold bed smelting furnace.
Preferably, the smelting in the step B adopts a cold cathode electron gun; the degree of vacuum of the melting is preferably 5.0X 10-3Pa～10Pa。
The cold cathode electron gun is filled with hydrogen, so that the recycled titanium material containing hydrogen does not pollute the smelting chamber.
Preferably, the smelting method in the step B comprises the following steps: the power of an electron gun in a smelting area of the electron beam cold bed smelting furnace is controlled to be 60-400 kW, the preferred power is 80-400 kW, the power of an electron gun in a refining area is 80-500 kW, and the power of an electron gun in a solidification area is 50-300 kW.
Preferably, the oxygen content is 0.11 to 0.18 wt%, and the hydrogen content is 0.014% or less.
The following examples are provided to further illustrate the embodiments of the present invention and are not intended to limit the scope of the present invention.
Example 1
Adding 50kg of pouring channel high-oxygen titanium reclaimed material with 0.31 wt% of oxygen content and 0.038% of carbon content formed in the titanium casting process into a hopper, and putting the hopper into a resistance furnace to be heated. The nitrogen tank is opened first, and the resistance furnace is purged with nitrogen for 20 min. The hydrogen generator is then turned on and the hydrogen gas is stored in a hydrogen storage tank. And introducing hydrogen for 20min to ensure that residual gas in the resistance furnace is exhausted. One end of the furnace is then kept sealed. The pressure of hydrogen is 0.5 MPa. The temperature was adjusted to 510 ℃ by turning on the controller of the resistance furnace and the reaction time was 10 minutes. And stopping heating the resistance furnace after the time is up, and cooling for 10 hours under the condition of introducing hydrogen to obtain the hydrogenated titanium block. The hydrogenated titanium block had a hydrogen content of 3.7%.
The hydrogenated titanium block was mixed with 70kg of grade 0 sponge titanium and fed into the screw feeder of the electron beam cold hearth melting furnace, and the feed inlet and discharge outlet of the screw feeder were closed. Firstly, the vacuum degree of the electron beam cold bed smelting furnace is adjusted to be 5 multiplied by 10-1Pa. And then starting the screw feeder to spin, and dropping the hydrogenated titanium blocks from a high point by utilizing the spinning of the screw feeder to finish the process of crushing the big blocks so as to form a small titanium hydride block reclaimed material. And opening the outlet of the screw feeder, and feeding the mixture into the electron beam cold bed smelting furnace through the screw feeder.
Starting a No. 1 electron gun, a No. 2 electron gun and a No. 3 electron gun in an electron beam cold bed smelting furnace for preheating, then adjusting the power and the scanning pattern of the No. 1 electron gun and the No. 2 electron gun, regulating and controlling the smelting speed by controlling the power of an electron beam, slowly melting the mixture of the reclaimed titanium hydride small blocks sent to the smelting furnace into titanium liquid, and adjusting the power and the scanning pattern of the No. 3 electron gun when the titanium liquid flows into a crystallizer in a solidification zone to keep the titanium liquid. And finally finishing the smelting process. And controlling the power of a No. 1 electron gun corresponding to a smelting area of the electron beam cold bed smelting furnace to be 70kW, the power of a No. 2 electron gun corresponding to a refining area to be 110kW, and the power of a No. 3 electron gun corresponding to a solidification area to be 80 kW. After the smelting is finished, the vacuum is kept, and the cooling time is 10 h.
The purity of the titanium product obtained in example 1 was 99.78%. The oxygen content was 0.11% and the hydrogen content was 0.014%.
Example 2
Adding 50kg of pouring channel high-oxygen titanium reclaimed material with 0.33 wt% of oxygen content and 0.039% of carbon content formed in the titanium casting process into a hopper, and putting the hopper into a resistance furnace to be heated. The nitrogen tank is opened first, and the resistance furnace is purged with nitrogen for 20 min. The hydrogen generator is then turned on and the hydrogen gas is stored in a hydrogen storage tank. And introducing hydrogen for 20min to ensure that residual gas in the resistance furnace is exhausted. One end of the furnace is then kept sealed. The pressure of hydrogen is 0.5 MPa. The electric resistance furnace controller is opened to adjust the temperature to 500 ℃ and the reaction time is 20 minutes. And stopping heating the resistance furnace after the time is up, and cooling for 10 hours under the condition of introducing hydrogen to obtain the hydrogenated titanium block. The hydrogenated titanium block had a hydrogen content of 3.6%.
The hydrogenated titanium block was mixed with 100kg of grade 0 sponge titanium and fed into the screw feeder of the electron beam cold hearth melting furnace, and the feed inlet and discharge outlet of the screw feeder were closed. Firstly, the vacuum degree of an electron beam cold bed smelting furnace is adjusted to be 3 multiplied by 10-1Pa. And then starting the screw feeder to spin, and dropping the titanium hydride blocks from a high point by utilizing the spinning of the screw feeder to finish the process of crushing the big blocks so as to form a small titanium hydride reclaimed material. And opening the outlet of the screw feeder, and feeding the mixture into the electron beam cold bed smelting furnace through the screw feeder.
Starting a No. 1 electron gun, a No. 2 electron gun and a No. 3 electron gun in an electron beam cold bed smelting furnace for preheating, then adjusting the power and the scanning pattern of the No. 1 electron gun and the No. 2 electron gun, regulating and controlling the smelting speed by controlling the power of an electron beam, slowly melting the mixture of the reclaimed titanium hydride small blocks sent to the smelting furnace into titanium liquid, and adjusting the power and the scanning pattern of the No. 3 electron gun when the titanium liquid flows into a crystallizer in a solidification zone to keep the titanium liquid. And finally finishing the smelting process. The smelting speed is regulated and controlled by controlling the power of an electron beam, the power of a No. 1 electron gun corresponding to a smelting area of an electron beam cold hearth smelting furnace is controlled to be 60kW, the power of a No. 2 electron gun corresponding to a refining area is controlled to be 100kW, and the power of a No. 3 electron gun corresponding to a solidification area is controlled to be 80 kW. After the smelting is finished, the vacuum is kept, and the cooling time is 12 h. The purity of the titanium product obtained in the embodiment 2 of the invention reaches 99.68 percent. The oxygen content was 0.13% and the hydrogen content was 0.013%.
Example 3
25kg of pouring channel high-oxygen titanium reclaimed material with the oxygen content of 0.18 wt% and the carbon content of 0.029% formed in the titanium casting process is added into a hopper, and the hopper is placed into a resistance furnace to be heated. The nitrogen tank is opened first, and the resistance furnace is purged with nitrogen for 20 min. The hydrogen generator is then turned on and the hydrogen gas is stored in a hydrogen storage tank. And introducing hydrogen for 20min to ensure that residual gas in the resistance furnace is exhausted. One end of the furnace is then kept sealed. The pressure of hydrogen is 0.5 MPa. Turning on a controller of the resistance furnace to adjust the temperature to the required temperature, wherein the hydrogenation temperature is 520 ℃; the reaction time was 20 minutes. And stopping heating the resistance furnace after the time is up, and cooling for 5 hours under the condition of introducing hydrogen to obtain the hydrogenated titanium block. The hydrogenated titanium block had a hydrogen content of 3.8%.
And mixing the hydrogenated titanium block with 100kg of 0-grade sponge titanium, feeding the mixture into a screw feeder of an electron beam cold bed smelting furnace, and closing a feed inlet and a discharge outlet of the screw feeder. Firstly, the vacuum degree of an electron beam cold bed smelting furnace is adjusted to be 6 multiplied by 10-1Pa. And then starting the screw feeder to spin, and dropping the titanium hydride blocks from a high point by utilizing the spinning of the screw feeder to finish the process of crushing the big blocks so as to form a small titanium hydride reclaimed material. And opening the outlet of the screw feeder, and feeding the mixture into the electron beam cold bed smelting furnace through the screw feeder.
Starting a No. 1 electron gun, a No. 2 electron gun and a No. 3 electron gun in an electron beam cold bed smelting furnace for preheating, then adjusting the power and the scanning pattern of the No. 1 electron gun and the No. 2 electron gun, regulating and controlling the smelting speed by controlling the power of an electron beam, slowly melting the mixture of the reclaimed titanium hydride small blocks sent to the smelting furnace into titanium liquid, and adjusting the power and the scanning pattern of the No. 3 electron gun when the titanium liquid flows into a crystallizer in a solidification zone to keep the titanium liquid. And finally finishing the smelting process. And controlling the power of the No. 1 electron gun corresponding to the smelting area of the electron beam cold bed smelting furnace to be 80kW, the power of the No. 2 electron gun corresponding to the refining area to be 90kW, and the power of the No. 3 electron gun corresponding to the solidification area to be 70 kW. After the smelting is finished, the vacuum is kept, and the cooling time is 8 h. The purity of the titanium product obtained in the embodiment 3 of the invention reaches 99.72 percent. The oxygen content was 0.16% and the hydrogen content was 0.012%.
The embodiment of the invention adopts the reclaimed materials, and the cost is reduced by more than 15 percent compared with the cost of using the titanium sponge.

Claims (13)

1. A method for preparing a titanium ingot by using a high-oxygen titanium reclaimed material is characterized by comprising the following steps:
A. heating the high-oxygen titanium reclaimed material in a hydrogen atmosphere for 5-30 minutes for reaction, and cooling to obtain a hydrogenated titanium block; wherein the reaction temperature is 470-550 ℃, the pressure of the hydrogen atmosphere is 0.2-1 MPa, the hydrogen content of the hydrogenated titanium block is 1.2-3.8 wt%, the oxygen content of the high-oxygen titanium reclaimed material is 0.08-0.40 wt%, and the carbon content of the high-oxygen titanium reclaimed material is 0.002-0.6 wt%;
B. crushing the hydrogenated titanium block, mixing the crushed titanium block with a titanium material, smelting the titanium block in an electron beam cold hearth smelting furnace, and cooling the titanium block to obtain a titanium ingot; wherein the mass ratio of the high-oxygen titanium reclaimed material to the titanium material is 1: 1-4; the titanium material is at least one of titanium sponge, titanium blocks and titanium bars;
the smelting method in the step B comprises the following steps: the power of an electron gun in a smelting area of the electron beam cold bed smelting furnace is controlled to be 60-400 kW, the power of an electron gun in a refining area is controlled to be 80-500 kW, and the power of an electron gun in a solidification area is controlled to be 50-300 kW.
2. The method for preparing titanium ingots from high-oxygen titanium reclaimed materials according to claim 1, wherein the power of an electron gun of the smelting zone is 80-400 kW.
3. The method for preparing a titanium ingot from a high-oxygen titanium reclaimed material according to claim 1, wherein the high-oxygen titanium reclaimed material has an oxygen content of 0.15 to 0.35 wt%.
4. The method for preparing titanium ingots from high-oxygen titanium reclaimed materials according to claim 3, wherein the high-oxygen titanium reclaimed materials are walling materials and/or pouring channel materials formed in the titanium casting process.
5. The method for preparing titanium ingots from high-oxygen titanium reclaimed materials according to claim 1, wherein the reaction temperature is 490-530 ℃.
6. The method for preparing the titanium ingot by using the high-oxygen titanium reclaimed materials according to any one of claims 1 to 5, wherein the step A is carried out in a tubular furnace, the high-oxygen titanium reclaimed materials are placed in the tubular furnace, the tubular furnace is purged with nitrogen for 10 to 20min, hydrogen is introduced for 15 to 20min, and then the reaction is carried out again.
7. The method for preparing titanium ingots from high-oxygen titanium reclaimed materials according to any one of claims 1 to 5, wherein the cooling is vacuum cooling for 3 to 6 hours.
8. The method for preparing titanium ingots from high-oxygen titanium reclaimed materials according to any one of claims 1 to 5, wherein the hydrogenated titanium blocks in the step B are crushed and mixed with titanium materials to form: and crushing the partially hydrogenated titanium blocks and titanium materials through a screw feeder and conveying the crushed titanium blocks and the titanium materials into an electron beam cold bed smelting furnace.
9. The method for preparing titanium ingots by using high-oxygen titanium reclaimed materials according to any one of claims 1 to 5, wherein the smelting in the step B adopts a cold cathode electron gun.
10. The method for preparing titanium ingots from high-oxygen titanium reclaimed materials according to any one of claims 1 to 5, wherein the vacuum degree of smelting is 5.0 x 10-3Pa～10Pa。
11. The method for preparing the titanium ingot by using the high-oxygen titanium reclaimed materials according to any one of claims 1 to 5, wherein the mass ratio of the high-oxygen titanium reclaimed materials to the titanium materials is 1: 1-1.4.
12. The method for preparing a titanium ingot from a high-oxygen titanium reclaimed material according to any one of claims 1 to 5, wherein the purity of the titanium ingot in the step B is more than 99.73%.
13. The method of claim 12, wherein the titanium ingot has an oxygen content of 0.11 to 0.18 wt% and a hydrogen content of 0.014% or less.
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