CN103820654A - Uniform oxygenation device for titanium sponge and method thereof - Google Patents
Uniform oxygenation device for titanium sponge and method thereof Download PDFInfo
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- CN103820654A CN103820654A CN201410062871.6A CN201410062871A CN103820654A CN 103820654 A CN103820654 A CN 103820654A CN 201410062871 A CN201410062871 A CN 201410062871A CN 103820654 A CN103820654 A CN 103820654A
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Abstract
A uniform oxygenation device for titanium sponge and a method thereof relate to the field of nonferrous metallurgy. According to the invention, an electrical heating radiant tube (3) and a furnace fan (5) are arranged inside a heating furnace (4) such that mixed gases in the heating furnace are uniformly dispersed in the heating furnace. Thus, uniform oxygenation problem of a titanium ingot is solved effectively. And by controlling heating temperature of the heating furnace, heating time and an inlet atmosphere, a uniform layer of oxidation film is formed on the surface of titanium sponge, thus stably controlling oxygen content of titanium sponge and realizing uniform oxygenation. Without adding a titanium dioxide powder which has poor adhesiveness and is easy for segregation during the titanium sponge smelting process, the titanium sponge with satisfactory oxygen content is produced through oxygenation. Thus, the titanium ingot requirement on oxygen content can be met; oxygen segregation of the titanium ingot and hard alpha metallurgical defects can be avoided effectively; oxygen uniformity of the titanium ingot is improved; and the technical problem that a titanium ingot cannot be uniformly oxygenated is solved.
Description
[technical field]
The present invention relates to Non-ferrous Metallurgy field, be specifically related to a kind of devices and methods therefor to titanium sponge even oxygen aeration.
[background technology]
Known, titanium sponge is the starting material of titanium ingot melting, in order to reach specific intensity rank, titanium or titanium alloy needs to add titanium dioxide and carries out oxygenation in fusion process, those skilled in the art often adopt dedicated mixer first by titanium sponge and titanium dioxide batch mixing, then mixed material is carried out to briquetting and electrode assembly welding, then in electrode fusion process, realize oxygenation, but because Powdered titanium dioxide is poor at titanium sponge surface adhesion, easy local segregation, cause titanium dioxide to add inhomogeneous and titanium ingot oxygen segregation, sometimes even there is hard α metallurgical imperfection etc., in order to improve titanium ingot oxygen element homogeneity, conventionally need to carry out three meltings, so not only long flow path, efficiency is low, cost is high, still cannot thoroughly solve the problem of titanium ingot even oxygen aeration, in addition, above-mentioned titanium ingot oxygenation technique can not meet the requirement of advanced EB melting High-efficient Production, bulk cargo shove charge, and want to control titanium ingot even oxygen aeration, can realize by controlling titanium sponge even oxygen aeration.
Applicant, through detailed search, does not also find to realize by heated oxide at present Patents or the bibliographical information of titanium sponge even oxygen aeration.
[summary of the invention]
For overcoming the deficiency existing in background technology, the invention provides a kind of devices and methods therefor to titanium sponge even oxygen aeration, the present invention by arranging electrically heated radiator tube and stove inner blower in process furnace, make mixed gas uniform in process furnace respectively in process furnace, effectively solve the problem of titanium ingot even oxygen aeration, and by controlling the Heating temperature of process furnace, heat-up time and the atmosphere passing into, form the even oxide film of one deck on titanium sponge surface, realize stable titanium sponge oxygen level and the even oxygen aeration object controlled, it is short that the present invention has flow process, efficiency is high, can realize the advantage of scale production.
For realizing goal of the invention as above, the present invention adopts technical scheme as described below:
A kind of device to titanium sponge even oxygen aeration, comprise material-feeding mechanism, process furnace, atmosphere premixed device, oxygen analyzer, cooling body and transmission guipure, be provided with two rows electrically heated radiator tube at the internal interval of described process furnace, between two row's electrically heated radiator tubes, be provided with and run through the transmission guipure that process furnace is imported and exported, on the furnace wall above upper row's electrically heated radiator tube, be provided with stove inner blower, a side at described stove inner blower is provided with mixed gas input tube, described mixed gas input tube connects atmosphere premixed device, described atmosphere premixed device connects oxygen analyzer, atmosphere premixed device connects respectively oxidizing atmosphere intake line and protective atmosphere intake line, entrance end at process furnace 4 is provided with material-feeding mechanism, be provided with cooling body 11 at the exit end of process furnace and form the described device to titanium sponge even oxygen aeration.
The described device to titanium sponge even oxygen aeration, when the electrically heated radiator tube arranging in described process furnace is set to a row, electrically heated radiator tube is arranged on the top of transmitting guipure.
The described device to titanium sponge even oxygen aeration, is provided with choke curtain between the entrance end of described process furnace and material-feeding mechanism, described choke curtain is arranged on the top of transmitting guipure.
The described device to titanium sponge even oxygen aeration, is provided with choke curtain between the exit end of described process furnace and cooling body, described choke curtain is arranged on the top of transmitting guipure.
To a method for titanium sponge even oxygen aeration, the method for described oxygenation comprises the steps:
The first step, first titanium sponge is placed on transmit on guipure and by transmitting guipure and enters material-feeding mechanism with titanium sponge, make titanium sponge transmit guipure uniform distribution by material-feeding mechanism, then enter in process furnace with titanium sponge by transmitting guipure;
Second step, connect step, open process furnace, and temperature and the soaking time of process furnace are set, the Heating temperature scope of process furnace is 300～700 ℃, and heat-up time, scope was 10～60min;
The 3rd step, connect step, heating atmosphere in process furnace is set, heating atmosphere oxygen concentration scope is 20～60%, more oxygen concentration is higher for now oxygenation amount, then pass into oxidizing atmosphere from oxidizing atmosphere intake line, pass into protective atmosphere from protective atmosphere intake line, two kinds of atmosphere are mixed in atmosphere premixed device, then regulate the flow of oxidizing atmosphere intake line and protective atmosphere intake line by the data that show on oxygen analyzer, and then realize the control of heating atmosphere oxygen concentration;
The 4th step, connect step, mixed atmosphere is sent into process furnace through mixed gas input tube, the stove inner blower arranging in process furnace increases atmosphere convection current, realize the homogeneity of Heating temperature and heating atmosphere in effective heating area, further, at process furnace entrance and outlet, choke curtain is set respectively, in process furnace, heating atmosphere keeps malleation simultaneously, enters in process furnace with the gas of isolating outside process furnace;
The 5th step, connect step, titanium sponge its surface in heat-processed can form the strong spontaneous even oxide film of one deck tack, now, by regulating oxygen concentration in Heating temperature, heat-up time and heating atmosphere, can control the thickness of oxide film, and then realize the target value of different demand oxygenation;
The 6th step, connect step, titanium sponge completes after oxygenation target value in process furnace, moves with titanium sponge by transmitting guipure, and titanium sponge is after cooling body is cooling.
The described method to titanium sponge even oxygen aeration, the uniform distribution in the described the first step, its cloth width is 300～1200mm, cloth height is 13～80mm.
The described method to titanium sponge even oxygen aeration, the oxidizing atmosphere in described the 3rd step is oxygen or air, described protective atmosphere is argon gas.
Adopt technical scheme as above, the present invention has superiority as described below:
A kind of devices and methods therefor to titanium sponge even oxygen aeration of the present invention, the present invention by arranging electrically heated radiator tube and stove inner blower in process furnace, make mixed gas uniform in process furnace respectively in process furnace, effectively solve the problem of titanium ingot even oxygen aeration, and by controlling the Heating temperature of process furnace, heat-up time and the atmosphere passing into, form the even oxide film of one deck on titanium sponge surface, realize stable titanium sponge oxygen level and the even oxygen aeration object controlled, by the satisfactory titanium sponge of oxygenation production oxygen level, and it is poor need in titanium sponge smelting process, not add tack, the easily titania powder of segregation, just can meet the requirement of titanium ingot to oxygen level, can effectively avoid the appearance of the oxygen element segregation of titanium ingot and hard α metallurgical imperfection, improve the homogeneity of titanium ingot oxygen element, solve the technical barrier that titanium ingot cannot even oxygen aeration, the present invention simultaneously has also solved High-efficient Production, the technical barrier of bulk cargo shove charge EB titanium ingot even oxygen aeration, it is short that the present invention has flow process, efficiency is high, the advantage of oxygenation stable and uniform.
[accompanying drawing explanation]
Fig. 1 is the structural representation of the present invention to titanium sponge even oxygen aeration device;
In the drawings: 1, material-feeding mechanism; 2, choke curtain; 3, electrically heated radiator tube; 4, process furnace; 5, stove inner blower; 6, atmosphere premixed device; 7, oxidizing atmosphere intake line; 8, protective atmosphere intake line; 9, oxygen analyzer; 10, mixed gas input tube; 11, cooling body; 12, titanium sponge; 13, transmit guipure.
[embodiment]
Can explain in more detail the present invention by the following examples, the present invention is not limited to the following examples;
A kind of device to titanium sponge even oxygen aeration described in 1 by reference to the accompanying drawings, comprise material-feeding mechanism 1, process furnace 4, atmosphere premixed device 6, oxygen analyzer 9, cooling body 11 and transmission guipure 13, be provided with two rows electrically heated radiator tube 3 at the internal interval of described process furnace 4, between two row's electrically heated radiator tubes 3, be provided with and run through the transmission guipure 13 that process furnace 4 is imported and exported, or at the interior row's electrically heated radiator tube 3 that arranges of described process furnace 4, wherein electrically heated radiator tube 3 is arranged on the top of transmitting guipure 13, or arrange electrically heated radiator tubes 3 interior setting of process furnace 4 more, between two row's electrically heated radiator tubes 3, arrange and transmit guipure 13 therein, further on the furnace wall above upper row's electrically heated radiator tube 3, be provided with stove inner blower 5, a side at described stove inner blower 5 is provided with mixed gas input tube 10, described mixed gas input tube 10 connects atmosphere premixed device 6, described atmosphere premixed device 6 connects oxygen analyzer 9, atmosphere premixed device 6 connects respectively oxidizing atmosphere intake line 7 and protective atmosphere intake line 8, be provided with material-feeding mechanism 1 at the entrance end of process furnace 4, between the entrance end of described process furnace 4 and material-feeding mechanism 1, be provided with and prevent that extraneous air from entering the choke curtain 2 in process furnace 4, described choke curtain 2 is arranged on the top of transmitting guipure 13, further, be provided with cooling body 11 at the exit end of process furnace 4, between the exit end of described process furnace 4 and cooling body 11, be provided with and prevent that extraneous air from entering the choke curtain 2 in process furnace 4, the top that described choke curtain 2 is arranged on transmission guipure 13 forms the described device to titanium sponge even oxygen aeration.
To a method for titanium sponge even oxygen aeration, the method for described oxygenation comprises the steps:
The first step, first titanium sponge 12 is placed on transmit on guipure 13 and by transmitting guipure 13 and enters material-feeding mechanism 1 with titanium sponge 12, make titanium sponge 12 transmit guipure 13 uniform distributions by material-feeding mechanism 1, cloth width is 300～1200mm, cloth height is 13～80mm, then enters in process furnace 4 with titanium sponge 12 by transmitting guipure 13;
Second step, connect step, open process furnace, and temperature and the soaking time of process furnace 4 are set, the Heating temperature scope of process furnace 4 is 300～700 ℃, and heat-up time, scope was 10～60min;
The 3rd step, connect step, heating atmosphere in process furnace 4 is set, heating atmosphere oxygen concentration scope is 20～60%, more oxygen concentration is higher for now oxygenation amount, then pass into oxidizing atmosphere from oxidizing atmosphere intake line 7, the gas of described oxidizing atmosphere is that oxidizing atmosphere is oxygen or air, pass into protective atmosphere from protective atmosphere intake line 8, the gas of described protective atmosphere is argon gas, now two kinds of atmosphere are mixed in atmosphere premixed device 6, then regulate the flow of oxidizing atmosphere intake line 7 and protective atmosphere intake line 8 by the data that show on oxygen analyzer 9, and then realize the control of heating atmosphere oxygen concentration,
The 4th step, connect step, mixed atmosphere is sent into process furnace 4 through mixed gas input tube 10, the stove inner blower 5 of process furnace 4 interior settings increases atmosphere convection current, realize the homogeneity of Heating temperature and heating atmosphere in effective heating area, further, at process furnace 4 entrances and outlet, choke curtain 2 is set respectively, the interior heating atmosphere of process furnace 4 keeps malleation simultaneously, enters in process furnace 4 with the gas of isolating outside process furnace 4;
The 5th step, connect step, titanium sponge 12 its surface in heat-processed can form the strong spontaneous even oxide film of one deck tack, now, by regulating oxygen concentration in Heating temperature, heat-up time and heating atmosphere, can control the thickness of oxide film, and then realize the target value of different demand oxygenation;
The 6th step, connect step, titanium sponge 12 completes after oxygenation target value in process furnace 4, moves with titanium sponge 12 by transmitting guipure 13, and titanium sponge 12 is after cooling body 11 is cooling.
Specific embodiment of the present invention is as follows:
Example 1:
1) titanium sponge 12 is through material-feeding mechanism 1, and titanium sponge 12 is realized uniform distribution, cloth width 800mm, cloth height 40mm on transmission guipure 13;
2) Heating temperature that process furnace 4 is set is 400 ℃, and be 25min heat-up time, and oxidizing atmosphere intake line 7 passes into oxygen, and protective atmosphere intake line 8 passes into argon gas, and two kinds of gases evenly mix in atmosphere premixed device 6, and it is 30% that oxygen concentration is set;
3) titanium sponge 12 is in heated oxide process, and the stove inner blower 5 in process furnace 4 is opened, and guarantees temperature and atmosphere evenness in effective heating area, and in heat-processed, titanium sponge 12 surfaces form the even oxide film of one deck, realize oxygenation;
4) composition that finally obtains titanium sponge 12 is: oxygen level 0.06～0.07%, Fe content 0.01～0.02%, C content 0.01～0.015%, N content 0.004～0.005%.
Example 2:
1) titanium sponge 12 is through material-feeding mechanism 1, and titanium sponge 12 is realized uniform distribution, cloth width 800mm, cloth height 30mm on transmission guipure 13;
2) Heating temperature that process furnace 4 is set is 500 ℃, and be 30min heat-up time, and oxidizing atmosphere intake line 7 passes into oxygen, and protective atmosphere intake line 8 passes into argon gas, and two kinds of gases evenly mix in atmosphere premixed device 6, and it is 30% that oxygen concentration is set;
3) titanium sponge 12 is in heated oxide process, and the stove inner blower 5 in process furnace 4 is opened, and guarantees temperature and atmosphere evenness in effective heating area, and in heat-processed, titanium sponge 12 surfaces form the even oxide film of one deck, realize oxygenation;
4) composition that finally obtains titanium sponge 12 is: oxygen level 0.09～0.10%, Fe content 0.01～0.02%, C content 0.01～0.015%, N content 0.004～0.005%.
Example 3:
1) titanium sponge 12 is through material-feeding mechanism 1, and titanium sponge 12 is realized uniform distribution, cloth width 800mm, cloth height 30mm on transmission guipure 13;
2) Heating temperature that process furnace 4 is set is 600 ℃, and be 30min heat-up time, and oxidizing atmosphere intake line 7 passes into air, and protective atmosphere intake line 8 is closed, and does not use protective atmosphere, and heating atmosphere is air, and oxygen concentration is 21%;
3) titanium sponge 12 is in heated oxide process, and the interior stove inner blower 5 of process furnace 4 is opened, and guarantees temperature and atmosphere evenness in effective heating area, and in heat-processed, titanium sponge 12 surfaces form the even oxide film of one deck, realize oxygenation;
4) finally obtaining titanium sponge 12 compositions is: oxygen level 0.11～0.12%, Fe content 0.01～0.02%, C content 0.015～0.020%, N content 0.005～0.010%.
Example 4:
1) titanium sponge 12 is through material-feeding mechanism 1, and titanium sponge 12 is realized uniform distribution, cloth width 800mm, cloth height 30mm on transmission guipure 13;
2) 650 ℃ of process furnace 4 Heating temperatures are set, heat-up time 35min, oxidizing atmosphere intake line 7 passes into oxygen, protective atmosphere intake line 8 passes into argon gas, two kinds of gases evenly mix in atmosphere premixed device, it is 40% that oxygen concentration is set;
3) titanium sponge 12 is in heated oxide process, and the interior stove inner blower 5 of process furnace 4 is opened, and guarantees temperature and atmosphere evenness in effective heating area, and in heat-processed, titanium sponge 12 surfaces form the even oxide film of one deck, realize oxygenation;
4) finally obtaining titanium sponge 12 compositions is: oxygen level 0.15～0.16%, Fe content 0.01～0.02%, C content 0.01～0.015%, N content 0.004～0.007%.
The effect that the present invention can realize:
The present invention can realize titanium sponge 12 even oxygen aerations, can realize stable titanium sponge 12 oxygen levels and the even oxygen aeration object controlled, oxygen level is stable to be controlled between 0.06～0.18%, according to the demand of oxygen level, control titanium sponge 12 oxygenation target values, the oxygen level value of departing from objectives is no more than ± and 0.01%, other major impurity constituent content span of control is Fe :≤0.05; C≤0.02; N≤0.02 (controlled).
The present invention simultaneously also tool has the following advantages;
1. the present invention, by controlling titanium sponge 12 Heating temperatures, heat-up time and heating atmosphere, realizes stable titanium sponge 12 oxygen levels and the even oxygen aeration object controlled, and finally obtains oxygen level and meet the titanium sponge of service requirements;
2. even through titanium sponge 12 oxygen distribution of the present invention's processing, in titanium ingot fusion process, without adding titanium dioxide, can realize the even oxygen aeration of titanium ingot;
3. simple, the good stability of apparatus structure of the present invention, technique enforcement easy to operate, can realize stable batch production;
4. titanium sponge 12 oxygenation of the present invention are without adding titania powder, batch mixing and briquetting, and flow process is short, and efficiency is high, solved the technical barrier of High-efficient Production, bulk cargo shove charge EB titanium ingot even oxygen aeration;
5. the present invention also can realize stable titanium sponge 12 nitrogen contents and the even nitrogen pick-up object controlled.
It should be noted that the present invention is not limited to carries out oxygenation to titanium sponge 12; be equally applicable to titanium sponge 12 to carry out even nitrogen pick-up; now oxidizing atmosphere intake line 7 is passed into nitrogen; protective atmosphere intake line 8 is that argon gas is constant; change oxygen analyzer 9 into nitrogen analyser simultaneously; by controlling titanium sponge 12 Heating temperatures, heat-up time and heating atmosphere nitrogen gas concn, can realize stable titanium sponge nitrogen content and the even nitrogen pick-up object controlled.
Part not in the detailed description of the invention is prior art.
The embodiment selecting in this article for open object of the present invention, currently thinks suitablely, still, will be appreciated that, the present invention is intended to comprise that all belong to all changes and the improvement of the embodiment in this design and invention scope.
Claims (7)
1. the device to titanium sponge even oxygen aeration, comprise material-feeding mechanism (1), process furnace (4), atmosphere premixed device (6), oxygen analyzer (9), cooling body (11) and transmission guipure (13), it is characterized in that: be provided with two rows electrically heated radiator tube (3) at the internal interval of described process furnace (4), between two row's electrically heated radiator tubes (3), be provided with and run through the transmission guipure (13) that process furnace (4) is imported and exported, on the furnace wall of upper row's electrically heated radiator tube (3) top, be provided with stove inner blower (5), be provided with mixed gas input tube (10) in a side of described stove inner blower (5), described mixed gas input tube (10) connects atmosphere premixed device (6), described atmosphere premixed device (6) connects oxygen analyzer (9), atmosphere premixed device (6) connects respectively oxidizing atmosphere intake line (7) and protective atmosphere intake line (8), be provided with material-feeding mechanism (1) at the entrance end of process furnace (4), be provided with cooling body (11) at the exit end of process furnace (4) and form the described device to titanium sponge even oxygen aeration.
2. the device to titanium sponge even oxygen aeration according to claim 1, is characterized in that: when the electrically heated radiator tube (3) arranging in described process furnace (4) is set to a row, electrically heated radiator tube (3) is arranged on the top of transmitting guipure (13).
3. the device to titanium sponge even oxygen aeration according to claim 1, is characterized in that: between the entrance end of described process furnace (4) and material-feeding mechanism (1), be provided with choke curtain (2), described choke curtain (2) is arranged on the top of transmitting guipure (13).
4. the device to titanium sponge even oxygen aeration according to claim 1, is characterized in that: between the exit end of described process furnace (4) and cooling body (11), be provided with choke curtain (2), described choke curtain (2) is arranged on the top of transmitting guipure (13).
5. implement the claims a kind of a kind of method to titanium sponge even oxygen aeration to titanium sponge even oxygen aeration device described in 1～4 arbitrary claim, it is characterized in that: the method for described oxygenation comprises the steps:
The first step, first titanium sponge (12) is placed on to transmit guipure (13) upper and enter material-feeding mechanism (1) by transmitting guipure (13) with titanium sponge (12), make titanium sponge (12) transmit guipure (13) uniform distribution by material-feeding mechanism (1), then enter in process furnace (4) with titanium sponge (12) by transmitting guipure (13);
Second step, connect step, open process furnace (4), and temperature and the soaking time of process furnace (4) are set, the Heating temperature scope of process furnace (4) is 300～700 ℃, and heat-up time, scope was 10～60min;
The 3rd step, connect step, heating atmosphere in process furnace (4) is set, heating atmosphere oxygen concentration scope is 20～60%, more oxygen concentration is higher for now oxygenation amount, then pass into oxidizing atmosphere from oxidizing atmosphere intake line (7), pass into protective atmosphere from protective atmosphere intake line (8), two kinds of atmosphere are mixed in atmosphere premixed device (6), then regulate the flow of oxidizing atmosphere intake line (7) and protective atmosphere intake line (8) by the upper data that show of oxygen analyzer (9), and then realize the control of heating atmosphere oxygen concentration;
The 4th step, connect step, mixed atmosphere is sent into process furnace (4) through mixed gas input tube (10), the stove inner blower (5) arranging in process furnace (4) increases atmosphere convection current, realize the homogeneity of Heating temperature and heating atmosphere in effective heating area, further, at process furnace (4) entrance and outlet, choke curtain (2) is set respectively, the interior heating atmosphere of process furnace (4) keeps malleation simultaneously, enters in process furnace (4) to isolate the outer gas of process furnace (4);
The 5th step, connect step, titanium sponge (12) its surface in heat-processed can form the strong spontaneous even oxide film of one deck tack, now by regulating oxygen concentration in Heating temperature, heat-up time and heating atmosphere, can control the thickness of oxide film, and then realize the target value of different demand oxygenation;
The 6th step, connect step, titanium sponge (12) completes after oxygenation target value in process furnace (4), and mobile with titanium sponge (12) by transmitting guipure (13), titanium sponge (12) is after cooling body (11) is cooling.
6. the method to titanium sponge even oxygen aeration according to claim 5, is characterized in that: the uniform distribution in the described the first step, and its cloth width is 300～1200mm, cloth height is 13～80mm.
7. the method to titanium sponge even oxygen aeration according to claim 5, is characterized in that: the oxidizing atmosphere in described the 3rd step is oxygen or air, and described protective atmosphere is argon gas.
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Cited By (1)
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