CN107010610A - A kind of energy-efficient high purity silicon nitride manganese production system - Google Patents
A kind of energy-efficient high purity silicon nitride manganese production system Download PDFInfo
- Publication number
- CN107010610A CN107010610A CN201710437898.2A CN201710437898A CN107010610A CN 107010610 A CN107010610 A CN 107010610A CN 201710437898 A CN201710437898 A CN 201710437898A CN 107010610 A CN107010610 A CN 107010610A
- Authority
- CN
- China
- Prior art keywords
- retort
- nitrogen
- basin
- reduction
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/06—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron
- C01B21/0637—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron with metals not specified in groups C01B21/0607 - C01B21/0635, other than aluminium, titanium, zirconium or hafnium
-
- 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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The invention discloses a kind of energy-efficient high purity silicon nitride manganese production system, mainly include electric furnace 19, retort 1, cooler 2, rough vacuum pump 16, rich nitrogen basin 13, hydrogenation purifier 12, pure nitrogen gas basin 10, reduction gas-reservoir tank 5, blender 8 etc., thus constitute the atmosphere displacement of system, reduction, nitridation, each several part is cooled down, life cycle of the product of the invention is short, and production cost is low, less energy consumption, nitrogen utilization rate is high, and product purity is high, and host element nitrogen, manganese and value are up to more than 99%.
Description
Technical field
The present invention relates to the production field of additive nitrogenized manganese in Ferrous Metallurgy, and in particular to the production of high purity silicon nitride manganese
Technology.
Background technology
The development of special steel increases the demand of nitrogenized manganese, particularly high to nitrogen and manganese element content, other impurities element
The low high-quality nitrogenized manganese demand of content is more.
The production method of many nitrogenized manganeses is currently suggested, the nitridation equipment used has tube furnace, fluidized-bed reaction
Stove, rotary furnace etc.；Pressurization（Nitrogenize pressure and be more than 0.1 MPa）, the nitridation equipment used have vacuum resistance furnace, shaft furnace,
Nitriding furnace etc., and realize that the related device of scale metaplasia is (the track type vacuum nitride resistive of the patent No. 200910044526.9
Stove), the yield of annual nitrogenized manganese has more than ten thousand tons, obtains preferable economic benefit, but there is also following shortcoming.
（1）Higher, the 10Pa condition of high vacuum degree before technological requirement nitridation reaction of process units power consumption, has used two class large powers
Vacuum pump assembly, and nitridation material only accounts for the 15~20% of furnace volume, and relative nullity space is also big so that the pumpdown time
Up to 10~12 hours, take and consume energy again, while in order to prevent furnace shell temperature distortion, being provided with stove outer covering water spray system, band
Amount of heat is walked, early stage device product per ton integrates 750 DEG C of power consumption, later stage device is by improving, and comprehensive power consumption also there are 500 DEG C.
（2）Whole device fixed investment is high, is up to 40~48 hours per the stove production cycle.Pure nitrogen gas utilization rate is low, scale
It is lost in metaplasia production big.
（3）Mn oxide content is high in product, and device could not be reduced to manganese oxide；Directly heat, heating electrode is
Carbon electrode, carbon material can volatilize effusion, penetrate into product, polluted product, make product carbon easily exceeded.
Also there is technical scheme to propose to rush the nitrogenous reducibility gas such as ammonia or ammonia pyrolysis gas into stove, reaction production water could not and
When discharge, vapor partial pressure is high, is unfavorable for proceeding for reduction reaction, most manganese oxide could not be restored.
The content of the invention
Present invention aims to overcome that the deficiency that above-mentioned technology is present is given birth to there is provided a kind of energy-efficient high purity silicon nitride manganese
Production system, the system removes the oxygen reduction in raw material, improves the quality of product, reduces the time consumption and energy consumption in production.
Technical scheme is as follows：A kind of energy-efficient high purity silicon nitride manganese production system, mainly including electrical heating
Stove, retort, cooler, rough vacuum pump, rich nitrogen basin, hydrogenation purifier, reduction gas-reservoir tank, pure nitrogen gas basin, mixing
It is provided with branched retort in device, the electric furnace, the retort and cooler, pump intake valve, rough vacuum pump, pumps out gas
Valve, rich nitrogen basin, hydrogenation purifier, booster fan, pure nitrogen gas basin, rush nitrogen valve and be sequentially connected by pipeline, constitute system
Atmosphere displacement loop, while for nitrogenizing；The retort and cooler, reduction air outlet valve, clarifier, reduction gas-reservoir tank,
Booster fan, blender, reduction intake valve are sequentially connected by pipeline, constitute the reduction loop of system.
Further, on the atmosphere displacement loop of system, the rough vacuum pump outlet conduit is provided with exhaust-valve, described cold
But device outlet be provided with moisture detector and oxygen, hydrogen detector and safe draining valve, the pure nitrogen gas basin by pipeline with
Nitrogen making machine is connected, for supplementing displacement nitrogen source and nitridation nitrogen source.
Further, on the reduction loop of system, the blender has branched pipe to be connected with ammonia cracker, for supplementing also
Protohydrogen gas, the blender separately has branched pipe to be connected with hydrogenation purifier, and the hydrogenation for rich nitrogen is purified.
Further, the retort is placed in electricity plus stove, and retort two ends are outside stove, and electric furnace is provided with automatic constant
Warm heater, electric furnace bottom cools down tank car provided with nitrogenized manganese.
Further, upper and lower end has thermal radiation resistant division board in the retort, and the material of retort is high temperature resistance and high strength
Steel alloy, 300~420mm of diameter of retort, 2000~4000mm of length, 30~60mm of wall thickness, is obtained by centrifugal casting.
The beneficial effects of the invention are as follows.
1st, retort has volume big, can account for total measurement (volume) 80%, and the production cycle of product shortens, and passes through atmosphere in retort
Oxygen content in retort, can just be down to 0.5% for 2 hours, the production cycle of a batch products can be controlled in 12 hours by displacement
It is interior.
2nd, production cost is low, and energy consumption is reduced, and nitrogen utilization rate is high, and product power consumption per ton is down to 400 degree of electricity.
3rd, product purity is high, and host element nitrogen, manganese and value are up to more than 99%.
Brief description of the drawings：
Fig. 1 is the production system connection figure of the present invention.
Embodiment.
1 illustrate technical scheme below in conjunction with the accompanying drawings, a kind of energy-efficient high purity silicon nitride manganese production
System, mainly include electric furnace 19, retort 1, cooler 2, rough vacuum pump 16, rich nitrogen basin 13, hydrogenation purifier 12,
Branched retort 1, the retort are provided with pure nitrogen gas basin 10, reduction gas-reservoir tank 5, blender 8, the electric furnace 19
1 with cooler 2, pump intake valve 17, rough vacuum pump 16, pump out air valve 14, rich nitrogen basin 13, hydrogenation purifier 12, pressurization wind
Machine 11, pure nitrogen gas basin 10, rush nitrogen valve 9 and be sequentially connected by pipeline, the atmosphere displacement loop of system is constituted, while for nitrogen
Change；The retort 1 and cooler 2, reduction air outlet valve 3, clarifier 4, reduction gas-reservoir tank 5, booster fan 6, blender 8, also
Former intake valve 7 is sequentially connected by pipeline, constitutes the reduction loop of system.
Further, on the atmosphere displacement loop of system, the outlet conduit of rough vacuum pump 16 is provided with exhaust-valve 15, institute
Cooler outlet pipe is stated provided with moisture detector 20 and oxygen, hydrogen detector 22 and safe draining valve 21, the pure nitrogen gas basin
10 are connected by pipeline with nitrogen making machine 24, for supplementing displacement nitrogen source and nitridation nitrogen source.
Further, on the reduction loop of system, the blender 8 has branched pipe to be connected with ammonia cracker 23, for also
Former hydrogen make-up, the blender 8 separately has branched pipe to be connected with hydrogenation purifier 12, and the hydrogenation for rich nitrogen is purified.
Further, the retort 1 is placed in electricity plus stove 19, and the two ends of retort 1 are outside electricity plus stove 19, electric furnace 19
Automatic constant temperature heating device 18 is provided with, electric furnace bottom cools down tank car 25 provided with nitrogenized manganese.
Further, upper and lower end has thermal radiation resistant division board 26 in the retort 1, and the material of retort 1 is high for high temperature resistant
Strength alloys steel, is obtained by centrifugal casting, 300~420mm of diameter of retort, 2000~4000mm of length, and wall thickness 30~
60mm。
The specific work process of the present invention is as follows.
The first step, feed sealed cans, the raw materials such as electrolytic manganese metal piece or manganese powder is loaded in retort 1, sealed shell of tank.
Second step, atmosphere displacement.
A) exhaust is once evacuated：Gas in retort 1 is quickly taken out with rough vacuum pump 16, gas bleeding emptying is evacuated to absolute pressure
After 0.05MPa, stop pumping, pure nitrogen gas in pure nitrogen gas basin 10 is poured into retort 1, after pressure reaches 0.2MPa, stop
Nitrogen is rushed, gas in retort 1 is discharged to rich nitrogen basin 13.
(b) secondary evacuate is reclaimed：Continued the gas of retort 1 being extracted into rich nitrogen basin 13 with rough vacuum pump 16, be evacuated to
After the MPa of absolute pressure 0.05, pure nitrogen gas is rushed into retort 1 again, stops rushing nitrogen after 0.2 MPa of pressure, by retort 1
Gas is discharged to rich nitrogen basin 13.
(c) three evacuations are reclaimed：The b that repeats the above steps is operated, when oxygen, hydrogen detector 22 check that the oxygen content in exhaust is low
In less than 0.5%, displacement is completed.
(d) it is hydrogenated with purification：It is recovered to the hydrogen that the rich nitrogen ammonia cracker 23 of rich nitrogen basin 13 is cracked out
Body carries out hydrogenation purifying, it is purified, except dereaction generation water after, obtain pure nitrogen gas, store reuse.
3rd step, starts to start electric heater unit 18 when carrying out second step.
4th step, when in-furnace temperature is raised to 800 DEG C.
（a）The also Primordial Qi that blender 8 has been matched is passed through retort 1, wherein hydrogen content 30~50%, and surplus is nitrogen, dimension
The MPa of pressure 0.05,850~950 DEG C of temperature are held, discharge gas hydrogen content maintains continuous 10~30%, and discharge gas is cooled down only through cooler 4
Change, be recovered to reduction gas-reservoir tank 5, and moisture is vented with the detection of moisture detector 20.
（b）When exhaust moisture is less than 0.1g/Nm3When, illustrate that the combination oxygen more than 90% in manganese oxide is reduced, change
Pure nitrogen gas is passed through, air cooling is discharged, purifies, is recovered to reduction gas-reservoir tank 5, when oxygen, the detection exhaust hydrogen content of hydrogen detector 22 are small
Stop discharge gas when 2%.
5th step, nitridation, continues to rush the MPa of pressure 0.2 in pure nitrogen gas, maintenance reaction tank 1,950~1050 DEG C of temperature, 4~
6 hours, it is ensured that higher nitrogen partial pressure, Accelerate nitriding reaction lifted nitrogen content in manganese.
6th step, pressurize cooling, keeps the MPa of pressure 0.2, stops heating, cooling.
7th step, nitrogen protection cooling, when temperature drops to 500 DEG C, pressure release opens flange, discharging to cooling tank to normal pressure
Car 25, nitrogen is rushed into tank, product is cooled to less than 200 DEG C under nitrogen protection.
The general principle and principal character of the present invention has been shown and described above.It should be understood by those skilled in the art that,
The present invention is not limited to the above embodiments, merely illustrating the principles of the invention described in above-described embodiment and specification,
Without departing from the spirit and scope, various changes and modifications of the present invention are possible, and these changes and improvements all fall
Enter in scope of the claimed invention.The scope of the present invention is defined by the appended claims and its equivalents.
Claims (3)
1. a kind of energy-efficient high purity silicon nitride manganese production system, mainly including electric furnace（19）, retort（1）, cooler
（2）, rough vacuum pump（16）, rich nitrogen basin（13）, hydrogenation purifier（12）, pure nitrogen gas basin（10）, reduction gas-reservoir tank（5）、
Blender（8）, it is characterised in that：The electric furnace（19）Inside it is provided with branched retort（1）, the retort（1）With it is cold
But device（2）, pump intake valve（17）, rough vacuum pump（16）, pump out air valve（14）, rich nitrogen basin（13）, hydrogenation purifier（12）、
Booster fan（11）, pure nitrogen gas basin（10）, rush nitrogen valve（9）It is sequentially connected by pipeline, constitutes the atmosphere displacement loop of system,
Simultaneously for nitrogenizing；The retort（1）With cooler（2）, reduction air outlet valve（3）, clarifier（4）, reduction gas-reservoir tank（5）、
Booster fan（6）, blender（8）, reduction intake valve（7）It is sequentially connected by pipeline, constitutes the reduction loop of system；
The rough vacuum pump（16）Outlet conduit is provided with exhaust-valve（15）, the cooler outlet pipe is provided with moisture detector
（20）With oxygen, hydrogen detector（22）With safe draining valve（21）, the pure nitrogen gas basin（10）Pass through pipeline and nitrogen making machine（24）
It is connected；
The blender（8）Have branched pipe respectively with ammonia cracker（23）With hydrogenation purifier（12）It is connected.
2. a kind of energy-efficient high purity silicon nitride manganese production system according to claim 1, it is characterised in that the reaction
Tank（1）It is placed on electricity plus stove（19）It is interior, retort（1）Two ends are in electricity plus stove（19）Outside, electric furnace（19）It is provided with automatic constant
Warm heater（18）, electric furnace bottom cools down tank car provided with nitrogenized manganese（25）.
3. a kind of energy-efficient high purity silicon nitride manganese production system according to claim 1 or 2, it is characterised in that described
Retort（1）Interior upper and lower end has thermal radiation resistant division board（26）, retort（1）Material be high temperature resistance and high strength alloy steel, lead to
Cross centrifugal casting to obtain, retort（1）300~420mm of diameter, 2000~4000mm of length, 30~60mm of wall thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710437898.2A CN107010610B (en) | 2017-06-13 | 2017-06-13 | High-efficiency energy-saving high-purity manganese nitride production system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710437898.2A CN107010610B (en) | 2017-06-13 | 2017-06-13 | High-efficiency energy-saving high-purity manganese nitride production system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107010610A true CN107010610A (en) | 2017-08-04 |
| CN107010610B CN107010610B (en) | 2023-09-19 |
Family
ID=59452991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710437898.2A Active CN107010610B (en) | 2017-06-13 | 2017-06-13 | High-efficiency energy-saving high-purity manganese nitride production system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107010610B (en) |
Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR551244A (en) * | 1921-05-17 | 1923-03-30 | Nitrogen Corp | Improvements in ammonia synthesis |
| GB234104A (en) * | 1924-05-19 | 1926-06-03 | Hydrazote | Improvements in methods for the manufacture of nitrogen or a mixture of nitrogen and hydrogen |
| US3397958A (en) * | 1965-08-10 | 1968-08-20 | Pechiney Prod Chimiques Sa | Process for the production of purified aluminum nitride |
| GB1414746A (en) * | 1972-04-13 | 1975-11-19 | Midland Ross Corp | Process of nitriding ferrous parts |
| US4812301A (en) * | 1986-04-24 | 1989-03-14 | The United States Of America As Represented By The Secretary Of The Interior | Production of titanium nitride, carbide, and carbonitride powders |
| JPH06256006A (en) * | 1993-02-26 | 1994-09-13 | Nittetsu Mining Co Ltd | Production of nitride powder |
| JPH09157830A (en) * | 1995-12-08 | 1997-06-17 | Mitsubishi Heavy Ind Ltd | Method for nitriding metallic material with gas and device therefor |
| JP2001072404A (en) * | 1999-08-31 | 2001-03-21 | Natl Res Inst For Metals | Production of chromium nitride |
| ES2201910A1 (en) * | 2002-06-18 | 2004-03-16 | Consejo Sup. De Investig. Cientificas | Lixmnn5-yoy product, production method thereof and use of same as an electrode in rechargeable lithium batteries |
| CN1803585A (en) * | 2006-01-18 | 2006-07-19 | 吴庆定 | Highly efficient energy-saving manganese nitride production process |
| CN101082088A (en) * | 2006-11-06 | 2007-12-05 | 王国宁 | Production technique for preparing high-purity high-nitrogen nitrogenization manganese metal |
| CN101172586A (en) * | 2007-09-30 | 2008-05-07 | 冯良荣 | Method for producing manganese nitride |
| US20080131350A1 (en) * | 2006-08-31 | 2008-06-05 | Burkes Douglas E | Method for Production of Metal Nitride and Oxide Powders Using an Auto-Ignition Combustion Synthesis Reaction |
| US20080193363A1 (en) * | 2004-08-20 | 2008-08-14 | Mitsubishi Chemical Corporation | Metal Nitrides and Process for Production Thereof |
| JP2009274944A (en) * | 2008-05-16 | 2009-11-26 | Fukuhara Co Ltd | Method and apparatus for producing hydrogen gas |
| US20130129600A1 (en) * | 2010-08-11 | 2013-05-23 | Taiheiyo Cement Corporation | Method for producing metal nitride |
| CN103601160A (en) * | 2013-11-29 | 2014-02-26 | 湖南源创高科工业技术有限公司 | Preparation method of manganese nitride |
| CN103614582A (en) * | 2013-12-13 | 2014-03-05 | 东北大学 | Method for producing manganese nitride product |
| CN103849829A (en) * | 2012-12-03 | 2014-06-11 | 安徽港铭新材料科技有限公司 | Preparation method for manganese-nitrogen alloy |
-
2017
- 2017-06-13 CN CN201710437898.2A patent/CN107010610B/en active Active
Patent Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR551244A (en) * | 1921-05-17 | 1923-03-30 | Nitrogen Corp | Improvements in ammonia synthesis |
| GB234104A (en) * | 1924-05-19 | 1926-06-03 | Hydrazote | Improvements in methods for the manufacture of nitrogen or a mixture of nitrogen and hydrogen |
| US3397958A (en) * | 1965-08-10 | 1968-08-20 | Pechiney Prod Chimiques Sa | Process for the production of purified aluminum nitride |
| GB1414746A (en) * | 1972-04-13 | 1975-11-19 | Midland Ross Corp | Process of nitriding ferrous parts |
| US4812301A (en) * | 1986-04-24 | 1989-03-14 | The United States Of America As Represented By The Secretary Of The Interior | Production of titanium nitride, carbide, and carbonitride powders |
| JPH06256006A (en) * | 1993-02-26 | 1994-09-13 | Nittetsu Mining Co Ltd | Production of nitride powder |
| JPH09157830A (en) * | 1995-12-08 | 1997-06-17 | Mitsubishi Heavy Ind Ltd | Method for nitriding metallic material with gas and device therefor |
| JP2001072404A (en) * | 1999-08-31 | 2001-03-21 | Natl Res Inst For Metals | Production of chromium nitride |
| ES2201910A1 (en) * | 2002-06-18 | 2004-03-16 | Consejo Sup. De Investig. Cientificas | Lixmnn5-yoy product, production method thereof and use of same as an electrode in rechargeable lithium batteries |
| US20080193363A1 (en) * | 2004-08-20 | 2008-08-14 | Mitsubishi Chemical Corporation | Metal Nitrides and Process for Production Thereof |
| CN1803585A (en) * | 2006-01-18 | 2006-07-19 | 吴庆定 | Highly efficient energy-saving manganese nitride production process |
| US20080131350A1 (en) * | 2006-08-31 | 2008-06-05 | Burkes Douglas E | Method for Production of Metal Nitride and Oxide Powders Using an Auto-Ignition Combustion Synthesis Reaction |
| CN101082088A (en) * | 2006-11-06 | 2007-12-05 | 王国宁 | Production technique for preparing high-purity high-nitrogen nitrogenization manganese metal |
| CN101172586A (en) * | 2007-09-30 | 2008-05-07 | 冯良荣 | Method for producing manganese nitride |
| JP2009274944A (en) * | 2008-05-16 | 2009-11-26 | Fukuhara Co Ltd | Method and apparatus for producing hydrogen gas |
| US20130129600A1 (en) * | 2010-08-11 | 2013-05-23 | Taiheiyo Cement Corporation | Method for producing metal nitride |
| CN103849829A (en) * | 2012-12-03 | 2014-06-11 | 安徽港铭新材料科技有限公司 | Preparation method for manganese-nitrogen alloy |
| CN103601160A (en) * | 2013-11-29 | 2014-02-26 | 湖南源创高科工业技术有限公司 | Preparation method of manganese nitride |
| CN103614582A (en) * | 2013-12-13 | 2014-03-05 | 东北大学 | Method for producing manganese nitride product |
Non-Patent Citations (4)
| Title |
|---|
| 王国宁;: "中温氮化烧结法制备高氮氮化锰工艺", 企业技术开发, no. 03 * |
| 蒋汉祥,王少娜,黄瑛,邓琴,陈精强: "氮化锰生产及结构分析", 重庆大学学报(自然科学版), no. 05 * |
| 钱茂洪;: "预抽真空箱式带罐气体氮化炉的应用", 金属加工(热加工), no. 2 * |
| 陈珏俐;吴庆定;: "氮化锰制备工艺研究进展", 铁合金, no. 06 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107010610B (en) | 2023-09-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102173424B (en) | Method and equipment for removing phosphorus and metal impurities in ganister sand through vacuum induction melting | |
| CN101643810B (en) | Technology for producing sponge iron and high purity CO gas | |
| CN111424153A (en) | Nitrogen recycling device for use in heat preservation period of bell-type annealing furnace | |
| CN1644720A (en) | Oxygen-enriched zinc smelting method | |
| CN101526311B (en) | Stove for utilizing high temperature slag | |
| CN207209961U (en) | A kind of energy-efficient high purity silicon nitride manganese production system | |
| CN107140611B (en) | A kind of novel high purity silicon nitride manganese process units | |
| CN204162438U (en) | A kind of fluidized-bed reactor producing silicon monoxide | |
| CN107010610A (en) | A kind of energy-efficient high purity silicon nitride manganese production system | |
| CN107416779A (en) | A kind of energy-efficient high purity silicon nitride manganese process units | |
| CN111498834B (en) | Purification device and method for carbon nanotube material | |
| CN107140610B (en) | A kind of energy-efficient high purity silicon nitride manganese production method | |
| CN103820604B (en) | A kind of pumped vacuum systems for vacuum outgas smelting furnace | |
| CN203768397U (en) | Vacuumizing system for vacuum degassing and smelting furnace | |
| CN212293673U (en) | Nitrogen recycling device for use in heat preservation period of bell-type annealing furnace | |
| CN105483330B (en) | A kind of vacuum system and its control method for vacuum outgas smelting furnace | |
| CN101474677B (en) | Direct reduction generator for copper powder of low apparent density and technique | |
| CN201560227U (en) | Reduction device used in magnesium reduction process of titanium sponge | |
| CN1051153A (en) | The method of making ultrafine powder of silicon nitride by dual-tube pressuring | |
| CN109110762B (en) | CO preparation device and method | |
| CN103882186A (en) | Vacuum-pumping device of RH (Ruhrstahl Hereaeus) refining furnace and use method thereof | |
| CN201407915Y (en) | Furnace utilizing high-temperature furnace slag | |
| CN201620183U (en) | Horizontal agitated reactor oxygen pipeline | |
| CN217173299U (en) | Hydrogen-heat-electricity combined supply integrated system based on active metal hydrolysis hydrogen production | |
| CN203807512U (en) | Vacuum-pumping device of RH refining furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Zhaobing Inventor after: Wang Guoning Inventor after: Yang Jiadong Inventor after: Yao Fayan Inventor before: Wang Zhaobing Inventor before: Yao Fayan |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |