CN100567515C - The molten steel vacuum refining system and method - Google Patents
The molten steel vacuum refining system and method Download PDFInfo
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- CN100567515C CN100567515C CNB2007100174380A CN200710017438A CN100567515C CN 100567515 C CN100567515 C CN 100567515C CN B2007100174380 A CNB2007100174380 A CN B2007100174380A CN 200710017438 A CN200710017438 A CN 200710017438A CN 100567515 C CN100567515 C CN 100567515C
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 56
- 239000010959 steel Substances 0.000 title claims abstract description 56
- 238000007670 refining Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000001301 oxygen Substances 0.000 claims abstract description 66
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 66
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 60
- 239000012535 impurity Substances 0.000 claims abstract description 48
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 45
- 229910052786 argon Inorganic materials 0.000 claims abstract description 23
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 239000007789 gas Substances 0.000 claims description 35
- 230000008569 process Effects 0.000 claims description 17
- 238000005259 measurement Methods 0.000 claims description 15
- 239000004744 fabric Substances 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000012546 transfer Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 9
- 238000005516 engineering process Methods 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 23
- 238000007664 blowing Methods 0.000 description 11
- 230000006872 improvement Effects 0.000 description 8
- 239000002699 waste material Substances 0.000 description 8
- 238000003912 environmental pollution Methods 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 235000011089 carbon dioxide Nutrition 0.000 description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000007872 degassing Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000001684 chronic effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000010742 number 1 fuel oil Substances 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 238000004801 process automation Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
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Abstract
A kind of molten steel vacuum refining system and method, comprise vacuum tank, pumped vacuum systems and be arranged on vacuum tank and pumped vacuum systems between outlet pipe, vacuum tank comprises vacuum tank, is arranged on the vacuum container cover at vacuum tank top, is arranged on the intravital ladle of vacuum tank, the argon system of the oxygen system that is arranged on the vacuum tank top and vacuum tank bottom, also comprises at least one vacuum mechanical pump group and is arranged on removal of impurities and governing system on the outlet pipe.The invention solves in the background technology that energy expenditure is big, impurity-eliminating effect is poor, the technical problem of contaminate environment.The present invention adopts the vacuum mechanical pump group, and vacuum degree control is good, and liquid steel refining is effective, saved great amount of cost.
Description
Technical field
The present invention relates to a kind of molten steel vacuum refining system and method, be specifically related to a kind of field of metallurgy molten steel vacuum refining system and method.
Background technology
In metallurgical field of steel-making, molten steel vacuum refining is all needed to vacuumize, what vacuumize employing at present is the pumped vacuum systems of vapor stream vacuum pump.It is to produce water vapor by boiler combustion, and water vapor forms Gas Jet at duct injection, and Gas Jet finishes vacuumizing through the vacuum tank gas of taking out of suitable for reading.
The pumped vacuum systems of vapor stream vacuum pump generally comprises vacuum tank, ladle, and vacuum container cover, the oxygen blast system, boiler, the jet-pump group, argon blowing system and multistage pond etc. are partly formed.The gas of this system after by the air outlet is a kind of mixed gas, and this mixed gas comprises water vapour, carbon monoxide, carbonic acid gas and the waste gas that contains steel impurity, so withdrawing gas needs removal of impurities and improvement, could discharge.At present removal of impurities and the improvement to withdrawing gas is to adopt removal of impurities of multistage pond and improvement, this processing mode waste and polluted water resource and cause systems bulky, complexity.
Boiler is that burning raw coal, coal gas or oil plant generation steam all have the lot of energy loss, and boiler combustion simultaneously pollutes; In addition, at the mixed gas of the intravital gas of vacuum tank based on carbon monoxide and carbonic acid gas, because water molecules carries can be limited, the molecular weight of water molecules is 18, and the molecular weight of the intravital mixed gas of vacuum tank should be between carbon monoxide 28 and carbonic acid gas 44, much larger than the molecular weight of water molecules.Therefore take the non-constant of pumped vacuum systems effect of gas and then the non-constant of effect of liquid steel refining out of by the water molecules bump; Cooling and removal of impurities have increased facilities such as pond and water pump again, have wasted water resources and electric energy, have also increased the cost of liquid steel refining.
Along with the continuous development of industrial economy, all kinds of resources and energy expenditure strengthen day by day, in order to protect and to economize on resources, realize sustainable economic development, and country has higher requirement to the reasonable utilization of resource and energy consumption.Energy consumption and water resource waste are its key in application problems of puzzlement always in existing vacuum technique is used.The pumped vacuum systems of vapor stream vacuum pump exists steam consumption quantity big, is because of the vapor stream vacuum pump inefficiency, and water resource waste is serious simultaneously, and the waste gas effect of pond improvement withdrawing gas is bad, causes environmental pollution.The exhaust gas emission of boiler combustion has been the unallowed a kind of existence of Process of Urbanization.
Sum up the liquid steel refining system that adopts the steam pumped vacuum systems at present, have following shortcoming and defect:
1. energy expenditure is big.Adopt vapor stream vacuum pump, required water energy and huge the required heat energy of water heating, and also the capacity usage ratio of water vapor gas is very low, and energy expenditure is big.
2. bodily form complexity, huge takes up room greatly.Equipment such as the multistage pond of removal of impurities and improvement withdrawing gas and boiler cause bodily form complexity, huge, and it is big to take up room.
3. impurity-eliminating effect is poor, and environmental pollution is serious.Utilize removal of impurities of multistage pond and improvement, DeGrain, and polluted water resource cause environmental pollution.
4. blowing oxygen quantity is big.Water vapor gas is bad in the effect that the pipeline jet band goes out gas, causes the ladle mouth pressure to be difficult to reduce, and needs to increase blowing oxygen quantity, causes the oxygen wasting of resources.
5. blowing oxygen quantity can't effectively be controlled.Water vapour occupies a large amount of proportions in the withdrawing gas, so the measurement of amount of oxygen can't accurately finish, and blowing oxygen quantity can't effectively be controlled.
Summary of the invention
The object of the present invention is to provide a kind of liquid steel refining system and method, it has solved, and energy expenditure is big in the background technology, impurity-eliminating effect is poor, the technical problem of contaminate environment.
The present invention replaces vapor stream vacuum pump with vacuum mechanical pump to carry out vacuum-oxygen decarbonizing, the degassing.Because vacuum mechanical pump is the vacuum tightness requirement of CONTROL PROCESS process accurately, reach the automatization control process.
Realize above-mentioned purpose technical solution of the present invention:
A kind of molten steel vacuum refining system, comprise vacuum tank, pumped vacuum systems and be arranged on vacuum tank and pumped vacuum systems between outlet pipe, described vacuum tank comprises vacuum tank, is arranged on the vacuum container cover at vacuum tank top, is arranged on the intravital ladle of vacuum tank, the argon system of the oxygen system that is arranged on the vacuum tank top and vacuum tank bottom, and its special character is: described pumped vacuum systems comprises at least one vacuum mechanical pump group; Described liquid steel refining system also comprises removal of impurities and the governing system that is arranged on the outlet pipe; Described removal of impurities and governing system comprise an annular housing and are arranged on the filter cloth of this annular housing air outlet that the bottom of this annular housing also is provided with the impurity collection channel.
Above-mentioned molten steel vacuum refining system also comprises computer control system and temperature measuring system, described temperature measuring system can be measured the temperature of vacuum tank, vacuum container cover, outlet pipe and vacuum mechanical pump group, but each measured temperature of described computer control system collecting temperature measuring system.
The smart vacuum refining of above-mentioned molten steel system also comprises the oxygen measurement system, described oxygen measurement system is arranged in the outlet pipe between removal of impurities and governing system and the vacuum mechanical pump group, and described computer control system can be gathered the oxygen-supplying amount of measured oxygen content of oxygen measurement system and corresponding control oxygen system.
Above-mentioned vacuum tank is provided with automatic can opening device, and described automatic can opening device is a cover walking car.
Above-mentioned molten steel vacuum refining system also comprises single vacuum storehouse charging system, and described single vacuum storehouse charging system is arranged on the vacuum container cover and with vacuum tank and is communicated with.
A kind of liquid steel refining method of using above-mentioned molten steel vacuum refining system, its special character is: said method comprising the steps of:
1). put molten steel, transfer argon
Insert molten steel in vacuum tank, connect the Argon pipeline of argon system, the scope of setting up the Argon amount is at 1～4L/tmin;
2). vacuum-oxygen decarbonizing
Open oxygen system, start vacuum pump group and removal of impurities and governing system, the vacuum tightness of vacuum tank is adjusted to 6.67KPa～13.3Kpa, finish until decarburizing reaction;
3). vacuum carbon deoxidization
Close oxygen system and stop oxygen blast, the vacuum tightness of vacuum tank is adjusted to 133Pa-260Pa, finish until the vacuum carbon deoxidization reaction;
4). vacuum outgas
The vacuum tightness of vacuum tank is adjusted to below the 67Pa, finishes until vacuum outgas.
The working process of above-mentioned removal of impurities and governing system may further comprise the steps
1). the removal of impurities of one-level eddy flow, cooling:
The ladle mixed gas of extracting out from vacuum tank enters the belt cavity of dedusting and cooling system by outlet pipe, forms eddy flow, and the withdrawing gas temperature descends, cooling, and the large granular impurity in the withdrawing gas falls in the eddy flow center, finishes removal of impurities, cooling;
2). the removal of impurities of secondary filter cloth:
Eddy flow removal of impurities, cooled gas pass through filter cloth again, and the fine impurities in the gas is adsorbed in filter cloth, realize the removal of impurities of secondary filter cloth.
Above-mentioned setting Argon amount is 4L/tmin.Facts have proved that molten steel can just fully roll best results when setting up the Argon amount was 4L/tmin.
The above-mentioned method of inserting molten steel in vacuum tank is molten steel to be inserted in the ladle insert in the vacuum tank again.
Dedusting and improvement step are in order to satisfy the demand of vacuum mechanical pump job requirement and environment protection; because contain high-temperature steel impurity particle and dust in the mixed gas of extracting out; do not carry out the dedusting meeting attached on the vacuum machine pump blade, influence vacuum mechanical pump working efficiency and life-span.
Monomer vacuum storehouse replaced order front three feed bin, simplified complicated reinforced process, and vacuum charging and sealing effectiveness are better.
Replace vapor stream vacuum pump with the oil-sealed rotary pump group, reduced the loss of energy, improved energy utilization ratio; Replace traditional removal of impurities of multistage pond and improvement with dedusting and cooling system, eliminated water resource waste, reduced the electric power resource waste, improved environmental pollution, reduced production cost; When the oxygen measurement systematic survey, the gas of measurement has not had a large amount of water vapors, and is relatively single, so the oxygen content measuring error is minimum, can in time adjust oxygen blast mechanism, reduces unnecessary waste of oxygen, further reduced cost; Oxygen blown blowing oxygen quantity, oxygen blow duration can be controlled automatically by computer control system, have truly realized automatization.
The present invention compared with prior art has following advantage:
1. energy expenditure is little.Directly vacuumize with the oil-sealed rotary pump group, cancelled the use of great lot of water resources, just consume a spot of electric energy, energy expenditure is little.
2. equipment is simple, and it is little to take up room.The oil-sealed rotary pump group has replaced vapor stream vacuum pump, has not had the water cycle and the boiler of multistage pond, complexity, has simplified equipment, and it is little to take up room.
3. good impurity removing effect, environmental pollution does not have.Adopt one-level eddy flow removal of impurities and the removal of impurities of secondary cloth bag, good impurity removing effect, environmental pollution does not have.
4. blowing oxygen quantity is little.The oil-sealed rotary pump group starts back ladle mouth pressure and reduces, and needs blowing oxygen quantity little.
5. blowing oxygen quantity may command.Do not have water vapour in the withdrawing gas, gas is single relatively, and it is accurate, controlled that amount of oxygen is measured, and avoided the waste of oxygen resource.
Description of drawings
Fig. 1 is a molten steel vacuum refining system architecture synoptic diagram of the present invention.
The drawing reference numeral explanation
The 1-vacuum tank; The 2-vacuum container cover; The 3-oxygen system; The 4-argon system; 5-cover walking car; The 6-ladle; The 7-outlet pipe; 8-vacuum mechanical pump group; 9-removal of impurities and governing system; 10-oxygen measurement system; The single vacuum of 11-storehouse charging system; The 12-annular housing; The 13-filter cloth; 14-impurity collection channel; The 15-temperature measuring system; The 16-computer control system.
Embodiment
Referring to accompanying drawing 1, a kind of molten steel vacuum refining system, comprise vacuum tank, pumped vacuum systems and be arranged on vacuum tank and pumped vacuum systems between outlet pipe 7, vacuum tank comprises vacuum tank 1, be arranged on the vacuum container cover 2 at vacuum tank 1 top, be arranged on the ladle 6 in the vacuum tank 1, the argon system 4 of the oxygen system 3 that is arranged on the vacuum tank top and vacuum tank bottom, and pumped vacuum systems comprises at least one vacuum mechanical pump group 8; The molten steel vacuum refining system also comprises removal of impurities and the governing system 9 that is arranged on the outlet pipe 7; Removal of impurities and governing system 9 comprise an annular housing 12 and are arranged on the filter cloth 13 of this annular housing air outlet that the bottom of this annular housing 12 also is provided with impurity collection channel 14; The molten steel vacuum refining system also comprises computer control system 16 and temperature measuring system 15; Temperature measuring system 15 can be measured the temperature of vacuum tank 1, vacuum container cover 2, outlet pipe 7 and vacuum mechanical pump group 8, but each measured temperature of computer control system 16 collecting temperature measuring systems 15; The molten steel vacuum refining system also comprises oxygen measurement system 10, oxygen measurement system 10 is arranged in the outlet pipe 7 between removal of impurities and governing system 9 and the vacuum mechanical pump group 8, and computer control system 16 can be gathered the measured oxygen content of oxygen measurement system 10 and the oxygen-supplying amount of corresponding control oxygen system 3; Vacuum tank is provided with automatic can opening device, and described automatic can opening device is a cover walking car; The liquid steel refining system also comprises single vacuum storehouse charging system 11, and described single vacuum storehouse charging system 11 is arranged on the vacuum container cover 2 and with vacuum tank and is communicated with.
Oxygen is blown into a top blast oxygen system 3 can be set;
Judge that for correct working state of system and the system protection that needs can be provided with temperature measuring system 15;
Because contain high-temperature steel impurity particle and dust in the mixed gas of extracting out, do not carry out the dedusting meeting attached on the vacuum machine pump blade, influence vacuum mechanical pump working efficiency and life-span, also have gas in the mixed gas of extraction, removal of impurities is set and governing system 9 addresses this problem topsoil;
Oil-sealed rotary pump group 8 is the prime mover that system work process produces necessary vacuum condition, can be equipped with some oil-sealed rotary pump combinations according to the refining amount of capacity, carries out work according to the requirement that technological process is different;
The parameter that oxygen content measurement system 10 can provide technology to carry out oxygen blast metering in the process in good time, convenient control in good time;
Argon system 4 is in order to satisfy the needs setting that technological process stirs the degassing;
Single vacuum storehouse charging system 11 mainly is to finish the alloy adding that technological process needs;
In vacuum tank 1, adopt ladle to contain molten steel, connect the Argon pipeline, set up the Argon amount and meet processing requirement, approximately be controlled at 1-4L/t.min, the best when general Argon amount is 4L/t.min, less than this value molten steel be difficult to fully to stir and need chronic, can cause argon gas waste and molten steel to lower the temperature excessive again greater than this value, fully stir with molten steel in technological operation personnel observation, promptly molten steel just rolls and is the best; Start several of oil-sealed rotary pump group 8, take out in advance; When vacuum tightness reaches condition that oxygen blast needs greater than 6.67Kpa, the beginning oxygen blast; Oxygen flow is controlled in the scope of calculating needs, this scope is that vacuum tightness is 6.67KPa～13.3Kpa, the parameter of measuring by oxygen measurement system 10, observe the variation tendency of oxygen concn, also can carry out computing and determine the oxygen blown time by computer, and then definite carbon content, finish vacuum-oxygen decarbonizing.Because blowing oxygen quantity is according to the variation of oxygen concn, the computing of computer is very accurately, increase and reduce the quantity of oil-sealed rotary pump by automatic control, oxygen blast process vacuum tightness can be stable be controlled at desired value, also can adopt converter technique that technological process vacuum tightness is controlled, promptly change the rotating speed of vacuum mechanical pump, change the draft size of vacuum mechanical pump, make it be stabilized in desired value by frequency conversion.Stop oxygen blast, the Argon amount approximately is controlled at 4L/t.min, and vacuum tightness can be very fast drops to 133Pa, finishes until vacuum carbon deoxidization.Continue to start vacuum mechanical pump, in about 10 minutes, can make vacuum tightness reach 67Pa and maintenance, finish until vacuum outgas.Also can take out deeply, according to the needs of operating procedure, make vacuum tightness can reach higher requirement, because the final vacuum of oil-sealed rotary pump is higher than the final vacuum of vapor stream vacuum pump far away.System for detecting temperature 15 can be obtained the parameter of technological process in good time, and then blowing oxygen quantity, oxygen blow duration, process safety are controlled by computer control system 16, and the computer system complete monitoring is realized the full-automation of control vacuum.
Claims (8)
1. molten steel vacuum refining system, comprise vacuum tank, pumped vacuum systems and be arranged on vacuum tank and pumped vacuum systems between outlet pipe (7), described vacuum tank comprises vacuum tank (1), be arranged on the vacuum container cover (2) at vacuum tank (1) top, be arranged on the ladle (6) in the vacuum tank (1), be arranged on the argon system (4) of the oxygen system (3) at vacuum tank top and vacuum tank (1) bottom, it is characterized in that: described pumped vacuum systems comprises at least one vacuum mechanical pump group (8): described molten steel vacuum refining system also comprises removal of impurities and the governing system (9) that is arranged on the outlet pipe (7); Described removal of impurities and governing system comprise an annular housing and are arranged on the filter cloth of this annular housing air outlet that the bottom of this annular housing also is provided with the impurity collection channel.
2. a kind of molten steel vacuum refining according to claim 1 system, it is characterized in that: described molten steel vacuum refining system also comprises computer control system (16) and temperature measuring system (15), described temperature measuring system (15) can be measured the temperature of vacuum tank (1), vacuum container cover (2), outlet pipe (7) and vacuum mechanical pump group (8), described computer control system (16) but each measured temperature of collecting temperature measuring system (15).
3. a kind of molten steel vacuum refining according to claim 2 system, it is characterized in that: described molten steel vacuum refining system also comprises oxygen measurement system (10), described oxygen measurement system (10) is arranged in the outlet pipe (7) between removal of impurities and governing system (9) and the vacuum mechanical pump group (8), and described computer control system (16) can be gathered the oxygen-supplying amount of measured oxygen content of oxygen measurement system (10) and corresponding control oxygen system (3).
4. a kind of molten steel vacuum refining according to claim 3 system, it is characterized in that: described vacuum tank is provided with automatic can opening device, and described automatic can opening device is a cover walking car.
5. according to claim 3 or 4 described a kind of molten steel vacuum refining systems, it is characterized in that: described liquid steel refining system also comprises single vacuum storehouse charging system (11), and described single vacuum storehouse charging system (11) is arranged on vacuum container cover (2) and goes up and be communicated with vacuum tank.
6. molten steel vacuum refining method that uses the described molten steel vacuum refining of claim 1 system is characterized in that: said method comprising the steps of:
1). put molten steel, transfer argon
Insert molten steel in vacuum tank (1), connect the Argon pipeline of argon system, the scope of setting up the Argon amount is at 1～4L/tmin:
2). vacuum-oxygen decarbonizing
Open oxygen system (3), start vacuum pump group (8) and removal of impurities and governing system (9), the vacuum tightness of vacuum tank is adjusted to 6.67KPa～13.3Kpa, finish until decarburizing reaction:
3). vacuum carbon deoxidization
Close oxygen system (3) and stop oxygen blast, the vacuum tightness of vacuum tank is adjusted to 133Pa-260Pa, finish until the vacuum carbon deoxidization reaction;
4). vacuum outgas
The vacuum tightness of vacuum tank is adjusted to below the 67Pa, finishes until vacuum outgas;
The working process of described removal of impurities and governing system (9) may further comprise the steps:
1). the removal of impurities of one-level eddy flow, cooling:
The ladle mixed gas of extracting out from vacuum tank enters the belt cavity of dedusting and cooling system by outlet pipe, forms eddy flow, and the withdrawing gas temperature descends, cooling, and the large granular impurity in the withdrawing gas falls in the eddy flow center, finishes removal of impurities, cooling:
2). the removal of impurities of secondary filter cloth:
Eddy flow removal of impurities, cooled gas pass through filter cloth again, and the fine impurities in the gas is adsorbed in filter cloth, realize the removal of impurities of secondary filter cloth.
7. a kind of molten steel vacuum refining method according to claim 6 is characterized in that: described setting Argon amount is 4L/tmin.
8. according to claim 6 or 7 described a kind of molten steel vacuum refining methods, it is characterized in that: the described method of inserting molten steel in vacuum tank is molten steel to be inserted in the ladle (6) insert in the vacuum tank (1) again.
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| CNB2007100174380A CN100567515C (en) | 2007-02-14 | 2007-02-14 | The molten steel vacuum refining system and method |
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| CNB2007100174380A CN100567515C (en) | 2007-02-14 | 2007-02-14 | The molten steel vacuum refining system and method |
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| CN100567515C true CN100567515C (en) | 2009-12-09 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101871035A (en) * | 2010-05-31 | 2010-10-27 | 北京科技大学 | Refining device and vacuum refining process for use in non-oriented silicon steel production |
| CN102943151B (en) * | 2012-10-24 | 2015-05-06 | 杭州杭真真空工程技术有限公司 | Steel liquid vacuum refinement system adopting complete-dry type mechanical vacuum pump |
| CN103173593B (en) * | 2013-04-11 | 2014-09-03 | 什邡市三裕锻件有限公司 | Molten steel vacuum refining system based on mechanical pump group |
| CN103266200A (en) * | 2013-05-15 | 2013-08-28 | 中冶南方工程技术有限公司 | Energy-saving environment-friendly RH (relative humidity) vacuum refining device |
| CN103451377B (en) * | 2013-08-31 | 2015-06-24 | 济钢集团有限公司 | Amorphous parent metal smelting method and amorphous parent metal smelting device |
| CN104846151B (en) * | 2015-06-01 | 2016-08-24 | 重庆钢铁集团设计院有限公司 | A kind of vacuum tank vacuum pumping method and vacuum refining method of molten steel thereof |
| CN109897942B (en) * | 2017-12-07 | 2020-10-13 | 江苏天工工具有限公司 | Vacuum degassing device for high-speed steel |
| CN108823357B (en) * | 2018-07-09 | 2021-04-30 | 上海宽量节能环保技术有限公司 | Degassing method of degassing system based on flexible mechanical vacuum pump set |
| CN113092679A (en) * | 2021-04-01 | 2021-07-09 | 国网陕西省电力公司电力科学研究院 | Analysis sensor for sulfur hexafluoride decomposition products and detection method thereof |
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Non-Patent Citations (2)
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| 德国KEP 厂VOD 工艺设备浅析. 李实，刘竤.中国冶金，第15卷第7期. 2005 |
| 德国KEP 厂VOD 工艺设备浅析. 李实，刘竤.中国冶金，第15卷第7期. 2005 * |
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Effective date of registration: 20210924 Address after: 710018 floor 12, building B, Yudao Huacheng, No. 8, Fengcheng 1, economic development zone, Xi'an, Shaanxi Province Patentee after: Xi'an Metallurgical Equipment Material Technology Co.,Ltd. Address before: Weiyang road 710012 Shaanxi city of Xi'an province (No. 138 Haosheng garden B903) Patentee before: Zhang Zuojian |
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Granted publication date: 20091209 |