CN110499430B - Vacuum system for producing titanium sponge by 7.5 ton I-type furnace - Google Patents
Vacuum system for producing titanium sponge by 7.5 ton I-type furnace Download PDFInfo
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- CN110499430B CN110499430B CN201910783529.8A CN201910783529A CN110499430B CN 110499430 B CN110499430 B CN 110499430B CN 201910783529 A CN201910783529 A CN 201910783529A CN 110499430 B CN110499430 B CN 110499430B
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- 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
- C22B34/1295—Refining, melting, remelting, working up of titanium
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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
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/02—Refining by liquating, filtering, centrifuging, distilling, or supersonic wave action including acoustic waves
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Abstract
The invention discloses a vacuum system for producing titanium sponge by using a 7.5-ton I-type furnace, belongs to the field of titanium sponge preparation, and solves the problem that the titanium sponge is polluted by pumping oil because a slide valve pump is used as a rough pumping pump in the conventional vacuum system. The technical scheme adopted by the invention is as follows: 7.5 ton I type stove production vacuum system for titanium sponge, including low, medium, three high vacuum pumping passageways, the low vacuum pumping passageway: distiller-first pneumatic flapper valve-first trap-first manual valve-second manual valve and third pneumatic flapper valve-first screw pump; the middle vacuum pumping passage: the distiller, a first pneumatic baffle valve, a first catcher, a first manual valve, a pneumatic gate valve, a third manual valve, a fourth pneumatic baffle valve, a roots pump and a second screw pump; high vacuum pumping path: distiller, second pneumatic baffle valve, second catcher, oil booster pump, third hand valve, fourth pneumatic baffle valve, Roots pump and second screw pump. The invention is suitable for preparing the titanium sponge by a vacuum distillation method.
Description
Technical Field
The invention belongs to the field of sponge titanium preparation, and particularly relates to a vacuum system for producing sponge titanium by using a 7.5-ton I-type furnace.
Background
Titanium and titanium alloy have the characteristics of high strength, corrosion resistance, high temperature resistance and the like, and have wide application in the fields of aerospace, deep sea exploration, chemical engineering, medical treatment and the like. Titanium sponge is used as a raw material for preparing titanium and titanium alloy, and is industrially prepared by a magnesiothermic reduction method. Magnesium reduction of TiCl4The obtained titanium sponge has 8-12% of MgCl remained2And 25-30% of Mg, and the vacuum distillation method is generally adopted for separation in industry.
The vacuum system is used as an important component of the titanium sponge production device, and the vacuum separation efficiency and the quality of the titanium sponge are directly influenced by the performances of the ultimate vacuum degree, the air exhaust speed, the air tightness and the like. To enable the titanium sponge to react with MgCl2Mg is thoroughly separated, and under different vacuum degrees, a vacuum system has the characteristics of high air exhaust rate, good air tightness, no pollution to sponge titanium by an air exhaust medium of a vacuum pump, real-time monitoring of the vacuum degrees of a vacuum pipeline and a distillation container, remote cutting of each air exhaust passage and the like so as to prevent the accidental interruption of the distillation process caused by mechanical failure of the vacuum pump.
The prior published documents introduce a vacuum system for producing titanium sponge, generally pay attention to the pumping rate and the ultimate vacuum degree of a vacuum unit, but do not consider the problems of vacuum degree monitoring in the distillation process, sponge titanium pollution caused by pumping oil, remote automatic switching among pumping passages and the like. For example, patent publication No. CN200996039Y discloses a vacuum system for titanium sponge production. The vacuum system uses the slide valve pump as an air suction pump of a low vacuum system and a rough suction pump of an oil booster pump of a high vacuum system, and the slide valve pump is an oil seal mechanical pump, so that vacuum pump oil molecules are remained in an air-extracted body, and sponge titanium is easily polluted. In addition, a vacuum gauge is not designed in the vacuum system, and air leakage in the using process is difficult to find in the first time. Patent publication No. CN201915135U discloses a vacuum distillation system used in the production of titanium sponge. The vacuum distillation system also uses an oil-sealed slide valve pump as a low vacuum pumping main pump and a rough pumping pump of a high vacuum passage. In addition, the vacuum distillation system is not designed with components such as a vacuum gauge, a vacuum valve and the like, and does not consider the switching use problem of the air extraction passage when the vacuum pump has mechanical failure. Patent publication No. CN101639728A discloses a vacuum distillation system for producing titanium sponge by a magnesium reduction distillation furnace. The vacuum distillation system is provided with four air pumping passages according to the characteristics of vacuum distillation, and a slide valve pump is still used as a rough pump; the vacuum distillation system also has the problem of difficulty in remote automatic switching among the air pumping passages because the vacuum degree is not monitored in real time.
Disclosure of Invention
The invention provides a vacuum system for producing titanium sponge by using a 7.5-ton I-type furnace, which solves the problem that the titanium sponge is polluted by pumping oil because a slide valve pump is used as a rough pumping pump in the conventional vacuum system.
The technical scheme adopted by the invention for solving the technical problems is as follows: the vacuum system for producing the sponge titanium by the 7.5-ton I-type furnace comprises a distiller, wherein the distiller is respectively connected with a first pneumatic baffle valve and a second pneumatic baffle valve through a tee joint, the first pneumatic baffle valve is connected with a first catcher, the first catcher is connected with a first manual valve, the first manual valve is connected with a first screw pump, and a second manual valve and a third pneumatic baffle valve are further arranged on a pipeline between the first manual valve and the first screw pump in series; the second pneumatic baffle valve is connected with the second trap, the second trap is connected with the oil booster pump, the oil booster pump is connected with the roots pump, the roots pump is connected with the second screw pump, and a third hand valve and a fourth pneumatic baffle valve are further arranged on a pipeline between the oil booster pump and the roots pump in series; set up first tie point between first manual valve and the manual valve of second, set up the second tie point between oil booster pump and the manual valve of third, through the connecting pipe intercommunication between two tie points, set up pneumatic push-pull valve on the connecting pipe.
Specifically, the method comprises the following steps: 7.5 ton I type vacuum system for stove production titanium sponge includes low, medium, three high vacuum pumping passageways, wherein: the low vacuum pumping path is as follows: distiller-first pneumatic flapper valve-first trap-first manual valve-second manual valve and third pneumatic flapper valve-first screw pump; the middle vacuum pumping passage is as follows: the distiller, a first pneumatic baffle valve, a first catcher, a first manual valve, a pneumatic gate valve, a third manual valve, a fourth pneumatic baffle valve, a roots pump and a second screw pump; high vacuum pumping path: distiller, second pneumatic baffle valve, second catcher, oil booster pump, third hand valve, fourth pneumatic baffle valve, Roots pump and second screw pump.
More specifically: the working pressure of the low vacuum pumping channel is 105Pa-1000 Pa, the working pressure of the hollow air pumping passage is 10 Pa-1000 Pa, and the working pressure of the high vacuum air pumping passage is 0.001 Pa-10 Pa.
Further, the method comprises the following steps: a vacuum gauge is arranged between the distiller and the tee joint, the vacuum gauge is arranged between the first manual valve and the first connecting point, and the vacuum gauge is arranged between the third manual valve and the fourth pneumatic baffle valve.
Specifically, the method comprises the following steps: the vacuum gauge is a resistance type vacuum gauge.
Specifically, the method comprises the following steps: the model of the first screw pump and the second screw pump is LGB150, the model of the Roots pump is JZJ600, and the model of the oil booster pump is Z320.
Specifically, the method comprises the following steps: the filter medium of the first trap is activated carbon, and the filter medium of the second trap is sponge titanium with the particle size smaller than 3 mm.
Specifically, the method comprises the following steps: the connecting mode of the pipeline of the vacuum system for producing the titanium sponge by the 7.5-ton I-type furnace is as follows: a detachable flange type connection. More specifically: the sealing gasket of detachable flange type connection is made of fluorine-containing nitrile rubber.
The invention has the beneficial effects that: compared with an oil-sealed mechanical pump (slide valve vacuum pump), the vacuum system for producing the titanium sponge by using the 7.5-ton I-type furnace has the advantages that the pollution of vacuum pump oil to the titanium sponge is avoided, and the high-quality titanium sponge with low C content is obtained.
The invention comprises three vacuum pumping passages, namely a low vacuum pumping passage, a middle vacuum pumping passage and a high vacuum pumping passage, and different pumping passages are used under different vacuum degrees to achieve the highest pumping speed and meet the requirement of the production of the titanium sponge of a large 7.5tI type furnace. In a distillation period, the air extraction capacity of a vacuum system is 150-3500L/s, and the ultimate vacuum degree can reach 0.001 Pa; the air leakage rate of the vacuum system is less than 0.27Pa/min when the vacuum degree is 10 Pa. The vacuum system has the characteristics of high ultimate vacuum degree, high air exhaust rate, low air leakage rate, automatic switching of medium and low vacuum pipelines, real-time monitoring of vacuum degree, no pollution of air exhaust medium to titanium sponge and the like, and has important significance for improving the vacuum distillation efficiency of the titanium sponge and improving the quality of the titanium sponge.
Each passage of the vacuum system is designed with a vacuum gauge, the pressure of a vacuum container and a pipeline can be monitored in real time, when the vacuum degree is abnormal, the pneumatic baffle valve can be remotely controlled, the switching between a medium vacuum unit and a low vacuum unit can be rapidly carried out, the problems that the pumping capacity of a pump is reduced, the sponge titanium is polluted by air due to air leakage of the vacuum pipeline and the content of the sponge titanium N, O is high due to mechanical faults of the pump and poor air tightness of the pipeline are effectively prevented.
Drawings
FIG. 1 is a schematic view of a vacuum system for producing titanium sponge in a 7.5 ton type I furnace according to the present invention.
Parts, positions and numbers in the drawings: the device comprises a distiller 1, a first pneumatic baffle valve 2, a second pneumatic baffle valve 3, a first catcher 4, a first manual valve 5, a second manual valve 6, a third pneumatic baffle valve 7, a first screw pump 8, a second catcher 9, an oil booster pump 10, a third manual valve 11, a fourth pneumatic baffle valve 12, a roots pump 13, a second screw pump 14, a pneumatic gate valve 15 and a vacuum gauge 16.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in figure 1, the vacuum system for producing titanium sponge by using a 7.5-ton I-type furnace comprises three vacuum pumping passages, namely a low vacuum pumping passage, a middle vacuum pumping passage and a high vacuum pumping passage, and comprises a distiller 1, wherein the distiller 1 is respectively connected with a first pneumatic baffle valve 2 and a second pneumatic baffle valve 3 through a tee joint, and the vacuum pumping passages are connected through vacuum pipelines as follows. A vacuum gauge 16 is also arranged between the distiller 1 and the tee joint.
The first pneumatic flapper valve 2 is connected with the first catcher 4, the first catcher 4 is connected with the first manual valve 5, the first manual valve 5 is connected with the second manual valve 6, the second manual valve 6 is connected with the third pneumatic flapper valve 7, and the third pneumatic flapper valve 7 is connected with the first screw pump 8. A vacuum gauge 16 is further provided between the first manual valve 5 and the second manual valve 6. The low vacuum pumping path is as follows: distiller 1-vacuum gauge 16-first pneumatic flapper valve 2-first catcher 4-first manual valve 5-vacuum gauge 16-second manual valve 6-third pneumatic flapper valve 7-first screw pump 8. The working pressure of the low vacuum pumping channel is 105Pa～1000Pa。
The second pneumatic baffle valve 3 is connected with the second catcher 9, the second catcher 9 is connected with the oil booster pump 10, the oil booster pump 10 is connected with the third hand valve 11, the third hand valve 11 is connected with the fourth pneumatic baffle valve 12, the fourth pneumatic baffle valve 12 is connected with the roots pump 13, and the roots pump 13 is connected with the second screw pump 14. Wherein a vacuum gauge 16 is arranged between the second catcher 9 and the oil booster pump 10, and a vacuum gauge 16 is arranged between the third manual valve 11 and the fourth pneumatic flapper valve 12. The high vacuum pumping path is as follows: the distiller comprises a distiller 1, a vacuum gauge 16, a second pneumatic flapper valve 3, a second catcher 9, a vacuum gauge 16, an oil booster pump 10, a third hand valve 11, a vacuum gauge 16, a fourth pneumatic flapper valve 12, a roots pump 13 and a second screw pump 14. The working pressure of the high vacuum pumping passage is 0.001 Pa-10 Pa.
Set up first tie point between first manual valve 5 and the manual valve 6 of second, set up the second tie point between oil booster pump 10 and the manual valve 11 of third, communicate through the connecting pipe between first tie point and the second tie point, set up pneumatic push-pull valve 15 on the connecting pipe. The middle vacuum pumping passage is as follows: the distiller comprises a distiller 1, a vacuum gauge 16, a first pneumatic baffle valve 2, a first catcher 4, a first manual valve 5, a vacuum gauge 16, a pneumatic gate valve 15, a third manual valve 11, a vacuum gauge 16, a fourth pneumatic baffle valve 12, a roots pump 13 and a second screw pump 14. The working pressure of the hollow air extraction passage is 10 Pa-1000 Pa.
The vacuum degree of a vacuum system for producing titanium sponge by using a 7.5-ton I-type furnace can reach 0.001Pa, the pumping speed of a vacuum unit in a distillation period is 150-3500L/s, and the air leakage rate of the distillation system is less than 0.27Pa/min when the vacuum degree is 10 Pa. The invention has the characteristics of high ultimate vacuum degree, high air extraction rate and low air leakage rate, the medium-low vacuum pipeline can be automatically switched, the vacuum degree can be monitored in real time, and the titanium sponge is not polluted by the air extraction medium.
Specifically, the vacuum gauge 16 is a resistance-type vacuum gauge, the first screw pump 8 and the second screw pump 14 are LGB150 in model, the roots pump 13 is JZJ600 in model, and the oil booster pump 10 is Z320 in model. The filter medium of the first catcher 4 is activated carbon, and the filter medium of the second catcher 9 is sponge titanium with the particle size smaller than 3 mm. The connecting mode of the pipeline of the vacuum system for producing the titanium sponge by the 7.5-ton I-type furnace is detachable flange type connection. The sealing gasket connected in a detachable flange manner is preferably made of fluorine-containing nitrile rubber.
The large-scale titanium sponge production technology is developed, and the air pumping capacity of a vacuum system, including ultimate vacuum degree, air pumping speed and air tightness, is well paid attention to the industry. In the vacuum distillation process, the pressure range of the distiller 1 is 0.01-105Pa, therefore, in the process of pressure reduction of the distiller 1, vacuum pumps with different working pressures are used for pumping air, and the vacuum distiller is provided with a high vacuum pumping channel, a middle vacuum pumping channel and a low vacuum pumping channel. In order to prevent the pumping medium (vacuum pump oil) of the vacuum pump from polluting the titanium sponge, the invention selects the screw pump as the rough pump of the vacuum system, namely the first screw pump 8 and the second screw pump 14 are selected as the rough pump of the vacuum system.
Since the screw pump is at 102～105Pa, the roots pump 13 is 1-103Pa, the oil booster pump has a rated air extraction rate of 0.001-10 Pa, so when the pressure of the distiller 1 is 103～105And when Pa is needed, the first screw pump 8 is used as an air exhaust passage of the main pump for air exhaust. When steamingWhen the pressure of the distiller is 10-1000 Pa, the roots pump 13 and the second screw pump 14 are used as the air pumping passages of the main pump for pumping air. When the pressure of the distiller is 0.001-10 Pa, the oil booster pump 10, the Roots pump 13 and the second screw pump 14 are used as air pumping passages of the main pump for air pumping. Since the airtightness of the vacuum system and the pumping rate of the vacuum pump directly affect the quality of the titanium sponge (mainly N, O, Cl), the vacuum system still needs to have real-time vacuum degree monitoring, and a vacuum gauge 16 is arranged.
The vacuum system for producing the sponge titanium by the 7.5-ton I-type furnace has the following three characteristics: (1) different air pumping passages can be used under different vacuum degrees to achieve the highest air pumping speed and meet the requirement of titanium sponge production of a large 7.5tI type furnace. (2) Compared with the existing scheme that a slide valve pump is used as a rough pumping pump, the structure of the screw pump and the Roots pump has the characteristic of no pollution of sponge titanium during pumping, and is favorable for obtaining high-quality sponge titanium with low C content. (3) The vacuum gauge is used for monitoring the pressure of the distiller 1 and the vacuum pipeline in real time, the vacuum passage can be remotely and automatically switched through the pneumatic baffle valve, the air pumping passage can be rapidly switched when the pressure is abnormal, and the problem that the content of the titanium sponge N, O is high due to mechanical failure of the pump and poor air tightness of the pipeline is solved.
Claims (6)
1.7.5 ton I type stove production vacuum system for titanium sponge, its characterized in that: the device comprises a distiller (1), wherein the distiller (1) is respectively connected with a first pneumatic baffle valve (2) and a second pneumatic baffle valve (3) through a tee joint, the first pneumatic baffle valve (2) is connected with a first catcher (4), a filter medium of the first catcher (4) is activated carbon, the first catcher (4) is connected with a first manual valve (5), the first manual valve (5) is connected with a first screw pump (8), and a second manual valve (6) and a third pneumatic baffle valve (7) are further arranged on a pipeline between the first manual valve (5) and the first screw pump (8) in series; the second pneumatic baffle valve (3) is connected with the second catcher (9), the filtering medium of the second catcher (9) is sponge titanium with the particle size smaller than 3mm, the second catcher (9) is connected with the oil booster pump (10), the oil booster pump (10) is connected with the roots pump (13), the roots pump (13) is connected with the second screw pump (14), and a third manual valve (11) and a fourth pneumatic baffle valve (12) are also arranged in series on a pipeline between the oil booster pump (10) and the roots pump (13); a first connecting point is arranged between the first manual valve (5) and the second manual valve (6), a second connecting point is arranged between the oil booster pump (10) and the third manual valve (11), the two connecting points are communicated through a connecting pipe, and a pneumatic gate valve (15) is arranged on the connecting pipe; a vacuum gauge (16) is arranged between the distiller (1) and the tee joint, the vacuum gauge (16) is arranged between the first manual valve (5) and the first connecting point, and the vacuum gauge (16) is arranged between the third manual valve (11) and the fourth pneumatic baffle valve (12);
7.5 ton I type vacuum system for stove production titanium sponge includes low, medium, three high vacuum pumping passageways, wherein: the low vacuum pumping path is as follows: distiller (1), first pneumatic baffle valve (2), first catcher (4), first manual valve (5), second manual valve (6), third pneumatic baffle valve (7) and first screw pump (8); the middle vacuum pumping passage is as follows: the distiller comprises a distiller (1), a first pneumatic baffle valve (2), a first catcher (4), a first manual valve (5), a pneumatic gate valve (15), a third manual valve (11), a fourth pneumatic baffle valve (12), a roots pump (13) and a second screw pump (14); high vacuum pumping path: distiller (1), second pneumatic baffle valve (3), second catcher (9), oil booster pump (10), third hand valve (11), fourth pneumatic baffle valve (12), roots pump (13) and second screw pump (14).
2. The vacuum system for producing titanium sponge in 7.5 ton type I furnace as claimed in claim 1, wherein: the working pressure of the low vacuum pumping channel is 105Pa-1000 Pa, the working pressure of the hollow air pumping passage is 10 Pa-1000 Pa, and the working pressure of the high vacuum air pumping passage is 0.001 Pa-10 Pa.
3. The vacuum system for producing titanium sponge in 7.5 ton type I furnace as claimed in claim 1, wherein: the vacuum gauge (16) is a resistance type vacuum gauge.
4. A vacuum system for producing titanium sponge in a 7.5 ton type I furnace according to claim 1 or 2, characterized in that: the first screw pump (8) and the second screw pump (14) are LGB150 in model, the roots pump (13) is JZJ600 in model, and the oil booster pump (10) is Z320 in model.
5. A vacuum system for producing titanium sponge in a 7.5 ton type I furnace according to claim 1 or 2, characterized in that: the connecting mode of the pipeline of the vacuum system for producing the titanium sponge by the 7.5-ton I-type furnace is as follows: a detachable flange type connection.
6. The vacuum system for producing titanium sponge in 7.5 ton type I furnace as claimed in claim 5, wherein: the sealing gasket of detachable flange type connection is made of fluorine-containing nitrile rubber.
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| CN201910783529.8A CN110499430B (en) | 2019-08-23 | 2019-08-23 | Vacuum system for producing titanium sponge by 7.5 ton I-type furnace |
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| CN110499430B true CN110499430B (en) | 2022-03-22 |
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| JPS5677381A (en) * | 1979-11-30 | 1981-06-25 | Anelva Corp | Exhaust system of dry etching unit |
| CN200996039Y (en) * | 2006-12-04 | 2007-12-26 | 遵义钛业股份有限公司 | Vacuum system for producing sponge titanium |
| CN201908799U (en) * | 2010-11-18 | 2011-07-27 | 金川集团有限公司 | Vacuumizing device |
| CN201915135U (en) * | 2010-12-13 | 2011-08-03 | 贵阳铝镁设计研究院有限公司 | Vacuum distillation system for titanium sponge production |
| CN206959566U (en) * | 2017-07-20 | 2018-02-02 | 河源正信硬质合金有限公司 | A kind of vacuum sintering furnace |
| CN110094967A (en) * | 2019-05-07 | 2019-08-06 | 株洲瑞德尔冶金设备制造有限公司 | A kind of vacuum drying oven using dry type screw pump |
-
2019
- 2019-08-23 CN CN201910783529.8A patent/CN110499430B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5677381A (en) * | 1979-11-30 | 1981-06-25 | Anelva Corp | Exhaust system of dry etching unit |
| CN200996039Y (en) * | 2006-12-04 | 2007-12-26 | 遵义钛业股份有限公司 | Vacuum system for producing sponge titanium |
| CN201908799U (en) * | 2010-11-18 | 2011-07-27 | 金川集团有限公司 | Vacuumizing device |
| CN201915135U (en) * | 2010-12-13 | 2011-08-03 | 贵阳铝镁设计研究院有限公司 | Vacuum distillation system for titanium sponge production |
| CN206959566U (en) * | 2017-07-20 | 2018-02-02 | 河源正信硬质合金有限公司 | A kind of vacuum sintering furnace |
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Effective date of registration: 20230919 Address after: 617000 Taoyuan street, East District, Panzhihua, Sichuan Province, No. 90 Patentee after: PANGANG GROUP PANZHIHUA IRON & STEEL RESEARCH INSTITUTE Co.,Ltd. Patentee after: Chengdu advanced metal material industry technology Research Institute Co.,Ltd. Address before: 617000 Taoyuan street, East District, Panzhihua, Sichuan Province, No. 90 Patentee before: PANGANG GROUP PANZHIHUA IRON & STEEL RESEARCH INSTITUTE Co.,Ltd. |