CN110658228B - Pre-reduction sintering cup test device and test method - Google Patents
Pre-reduction sintering cup test device and test method Download PDFInfo
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- CN110658228B CN110658228B CN201910944416.1A CN201910944416A CN110658228B CN 110658228 B CN110658228 B CN 110658228B CN 201910944416 A CN201910944416 A CN 201910944416A CN 110658228 B CN110658228 B CN 110658228B
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- 238000005245 sintering Methods 0.000 title claims abstract description 85
- 238000012360 testing method Methods 0.000 title claims abstract description 25
- 238000010998 test method Methods 0.000 title claims abstract description 9
- 239000007789 gas Substances 0.000 claims abstract description 99
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 74
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 36
- 238000010438 heat treatment Methods 0.000 claims abstract description 34
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000001301 oxygen Substances 0.000 claims abstract description 25
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 25
- 238000009826 distribution Methods 0.000 claims abstract description 16
- 230000007246 mechanism Effects 0.000 claims abstract description 13
- 230000001276 controlling effect Effects 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 239000003034 coal gas Substances 0.000 claims description 3
- 238000011160 research Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000005265 energy consumption Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 229910001882 dioxygen Inorganic materials 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000000571 coke Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000010405 reoxidation reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000009770 conventional sintering Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/02—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering
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- 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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention discloses a pre-reduction sintering cup test device and a test method, wherein a pre-reduction sintering cup body and an igniter are mutually matched and hermetically connected through a turnbuckle, and the igniter is driven by a lifting rotating mechanism; the top of the igniter is sealed and is communicated with the air inlet pipe through a rotating shaft arranged at the top; the gas inlet pipe is connected with a reducing gas inlet pipeline and a gas distribution heating system; the distribution heating system comprises a main pipeline, air enters from the main pipeline, and the main pipeline is sequentially connected with an oxygen inlet pipeline, a nitrogen inlet pipeline, a gas mixer and a gas heating furnace according to the gas flowing direction.
Description
Technical Field
The invention belongs to the field of ferrous metallurgy, relates to a pre-reduction test method, and particularly relates to a pre-reduction sintering cup test device and a test method.
Background
In the steel industry, the energy consumption of iron making accounts for more than 50% of the total energy consumption of steel production, and how to effectively reduce the energy consumption of a blast furnace becomes an important task for enterprises and society. With the development of large-scale blast furnaces, the whole system of the blast furnace production line is a lifeline, so that the safety, normality and orderly development of the lifeline are guaranteed, the huge energy consumption is reduced, and the production line is more and more consistent pursued by all ironmaking workers. How to reduce the coke ratio and fuel ratio which account for about 75% of the total energy consumption of the blast furnace and about 85% of the total fuel consumption is particularly important in energy conservation and consumption reduction.
At present, the research of pre-reduction sintering is just started worldwide, and similar research is not found in the journal. The pre-reduction sintering is different from direct reduction, and aims to share partial pressure of a blast furnace and partially realize the reduction process of raw materials existing in the blast furnace in the sintering process in one step in advance. The method has the effects of improving the grade of raw materials fed into the blast furnace, shortening the production period of the blast furnace, improving the smooth operation of the blast furnace, and discussing the feasibility of replacing coke with other common coal in the sintering process so as to reduce the coke consumption of the blast furnace.
Due to the lack of corresponding basic research means of the pre-reduction technology, a common sintering cup test system cannot solve the problems of reoxidation and over-fusion bonding of the pre-reduced sintered ore and series requirements of pre-reduction sintering on gas properties, temperature, pressure and the like, which seriously restrict the research and development of the pre-reduced sintered ore, and a set of pre-reduction sintering test device and an operation method with operability and popularization are urgently needed to be constructed, so that the development of the domestic pre-reduction sintering basic research is promoted.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to solve the technical problem that pre-reduction sintering has important significance on energy conservation and emission reduction work in the steel industry and is an important technology for future steel development. However, due to the characteristics of the pre-reduction sintering technology, the pre-reduction sintering technology is in a research stage of a laboratory at home and abroad at present, and because the pre-reduction sintering is mainly in a reducing atmosphere, the conventional sintering cup test system is mainly in an oxidizing atmosphere at present, the requirements of the pre-reduction sintering technology cannot be met, and no mature basic research means exists at home and abroad at present. The invention is designed completely according to the requirements of the pre-reduction sintering technology, completely solves the key problems in the pre-reduction sintering test from aspects of adjustable gas components, pressure and temperature, complete sealing of an igniter and a sintering cup, nitrogen protection, computer intelligent control and the like, reduces the reoxidation problem of sintering ores to the maximum extent, prevents explosion during pre-reduction sintering and the like, and provides the most advanced research means for the research and exploration of the pre-reduction sintering.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a reduce sintering cup test device in advance, includes reduce sintering cup body, some firearm, display measuring apparatu and computer acquisition control system in advance, its characterized in that: the pre-reduction sintering cup body and the igniter are mutually matched and hermetically connected through a turnbuckle, and the igniter is driven by a lifting rotating mechanism; the top of the igniter is sealed and is communicated with the air inlet pipe through a rotating shaft arranged at the top; the gas inlet pipe is connected with a reducing gas inlet pipeline and a gas distribution heating system; the distribution heating system comprises a main pipeline, air enters from the main pipeline, and the main pipeline is sequentially connected with an oxygen inlet pipeline, a nitrogen inlet pipeline, a gas mixer and a gas heating furnace according to the gas flowing direction.
And a measurement control instrument is arranged on the reducing gas inlet pipeline.
And a main pipeline of the air distribution heating system is provided with an electromagnetic switch, a pressure measuring instrument and an air flow measuring controller.
The oxygen inlet pipeline and the nitrogen inlet pipeline are respectively provided with an oxygen adjusting and controlling device and a nitrogen adjusting and controlling device.
The reduction sintering cup body is provided with at least 3 temperature measuring points, gas component measuring points and gas pressure measuring points which comprise an upper part, a middle part and a lower part, the temperature, the pressure and the components are measured on line in real time, and data are fed back to a computer acquisition control system to form a series of charts.
A pre-reduction sintering cup test method is characterized in that: after the sintering mixture is distributed into the cup body of the pre-reduction sintering cup, air is introduced into a gas mixer through a computer acquisition control system, a display measuring instrument control electromagnetic switch, a pressure measuring instrument and an air flow measuring controller, then the air is heated to 800 ℃ by a gas heating furnace, introduced into an igniter and mixed and ignited with reducing gas introduced through the control of the measuring controller, after ignition, the reducing gas is firstly closed, and then a gas distribution heating system is closed; then, the igniter descends through a lifting rotating mechanism and is in full-sealing connection with the cup body of the pre-reduction sintering cup, reducing gas is introduced, meanwhile, nitrogen and oxygen are respectively introduced into a gas mixer through a nitrogen adjusting and controller and an oxygen adjusting and controller, automatic gas distribution is carried out through a computer acquisition control system and a display measuring instrument according to set gas components, the prepared gas is heated to 800 ℃ through a gas heating furnace and is introduced into the igniter for pre-reduction sintering, after sintering is finished, the reducing gas is closed, the gas heating furnace is closed, the oxygen and oxygen adjusting and controller are closed, the nitrogen is ensured to be introduced according to the flow required by the test through the nitrogen adjusting and controller, after the integral temperature of the sintering ore is detected to be reduced to be below 100 ℃ through a temperature measuring point arranged on the cup body, the lifting rotating mechanism is controlled to separate the igniter from the cup body of the pre-reduction sintering cup, and closing the nitrogen regulation and control device and the nitrogen, and finishing the pre-reduction sintering test.
The invention has the beneficial effects that: the invention can realize the automatic adjustment of various gas components in the sintering process, grope out the optimal oxygen partial pressure according to different raw material conditions and test requirements, thereby exploring the optimal atmosphere control range, and after the sintering is finished, controlling the nitrogen content, thereby realizing that the pre-sintered ore is not reoxidized; and through setting up the heating furnace, can realize the hot-blast sintering of prereduction, further improve the quality of prereduction sintering deposit. The pressure of the gas is adjustable, high-pressure sintering can be realized, and the productivity of pre-reduction sintering is further improved. The rotary sealing connection of the igniter and the sintering cup body can thoroughly isolate the influence of air leakage on sintering, and the influence of human factors can be reduced to the minimum through the intelligent control of big data of a computer.
Drawings
FIG. 1 is a schematic diagram of a pre-reduction sinter pot test setup;
in the figure, 1 air, 2 electromagnetic switches, 3 pressure measuring instruments, 4 air flow measuring controllers, 5 nitrogen regulating and controlling instruments, 6 nitrogen, 7 oxygen, 8 oxygen regulating and controlling instruments, 9 gas mixers, 10 gas heating furnaces, 11 reducing gas, 12 measuring and controlling instruments, 13 lifting and rotating mechanisms, 14 igniters, 15 pre-reducing sintering cup bodies, 16 display measuring instruments, 17 computer acquisition and control systems and 18 rotating shafts.
Detailed Description
The following description is given with reference to specific examples:
a pre-reduction sintering cup test device comprises a pre-reduction sintering cup body 15, an igniter 14, a display measuring instrument 16 and a computer acquisition control system 17, wherein the pre-reduction sintering cup body 15 and the igniter 14 are mutually matched and hermetically connected through a turnbuckle, and the igniter 14 is driven by a lifting rotating mechanism 13; the top of the igniter 14 is sealed and is communicated with an air inlet pipe through a rotating shaft 18 arranged at the top; the gas inlet pipe is connected with a reducing gas inlet pipeline and a gas distribution heating system; the distribution heating system comprises a main pipeline, air enters from the main pipeline, and the main pipeline is sequentially connected with an oxygen inlet pipeline, a nitrogen inlet pipeline, a gas mixer 9 and a gas heating furnace 10 according to the gas flowing direction.
And a measurement controller 12 is arranged on the reducing gas inlet pipeline.
The main pipeline of the distribution heating system is provided with an electromagnetic switch 2, a pressure measuring instrument 3 and an air flow measuring controller 4.
The oxygen inlet pipeline and the nitrogen inlet pipeline are respectively provided with an oxygen adjusting and controlling device 8 and a nitrogen adjusting and controlling device 5.
The reduction sintering cup body 15 is provided with at least 3 temperature measuring points, gas component measuring points and gas pressure measuring points which comprise an upper part, a middle part and a lower part, the temperature, the pressure and the components are measured on line in real time, and data are fed back to the computer acquisition control system 17 to form a series of charts.
Example 1
When a pre-reduction sintering test is carried out, a sintering mixture is distributed into a pre-reduction sintering cup body 15 with the diameter of 200mm and the height of 700mm, air 1 with the natural temperature is introduced into a gas mixer 9 through a computer acquisition control system 17 and a display measuring instrument 16 to control an electromagnetic switch 2, a pressure measuring instrument 3 and an air flow measuring controller 4, then the air is heated to 200 ℃ by a gas heating furnace 10, introduced into an igniter 14 and mixed and ignited with liquefied gas 11 introduced through control of a measuring controller 12, the ignition temperature is 1000 ℃, after ignition, the liquefied gas 11 is closed through the measuring controller 12, then the air 1 is closed through the air flow measuring controller 4, and the gas heating furnace 10 is closed. Then, an igniter 14 descends through a lifting and rotating mechanism 13 and is in full-sealing connection with a pre-reduction sintering cup body 15, liquefied gas 11 is introduced through a measurement controller 12, nitrogen 6 and oxygen 7 are respectively introduced into a gas mixer 9 through a nitrogen adjusting and controller 5 and an oxygen adjusting and controller 8, gas supply pressure is set to be in a high-pressure state according to set gas components, automatic gas distribution is carried out through a computer acquisition control system 17 and a display measuring instrument 16, the prepared gas is heated to 200 ℃ through a gas heating furnace 10 and then is introduced into the igniter 14 for pre-reduction sintering, the temperature, the pressure and the gas components at the upper, middle and lower three positions of the sintering cup body 15 are fed back to the computer acquisition control system 17 as analysis data in the sintering process, after the sintering is finished, the liquefied gas 11 is closed, the gas heating furnace 10 is closed, the oxygen 7 and the oxygen adjusting and controller 8 are closed, and ensuring that the nitrogen 6 is introduced according to the flow required by the test through the nitrogen adjusting and controlling device 5, controlling the lifting and rotating mechanism 13 to separate the igniter 14 from the cup body 15 of the pre-reduction sintering cup after detecting that the overall temperature of the sintering ore is reduced to be below 100 ℃ through the temperature measuring point arranged on the cup body, closing the nitrogen adjusting and controlling device 5 and the nitrogen 6, and finishing the pre-reduction sintering test.
Example 2
When a pre-reduction sintering test is carried out, a sintering mixture is distributed into a pre-reduction sintering cup body 15 with the diameter of 300mm and the height of 1000mm, air 1 with the natural temperature is introduced into a gas mixer 9 through a computer acquisition control system 17 and a display measuring instrument 16 to control an electromagnetic switch 2, a pressure measuring instrument 3 and an air flow measuring controller 4, then the air is heated to 600 ℃ by a gas heating furnace 10, introduced into an igniter 14 and mixed and ignited with coal gas 11 introduced through control of a measuring controller 12, the ignition temperature is 1100 ℃, the coal gas 11 is closed through the measuring controller 12 after ignition, then the air 1 is closed through the air flow measuring controller 4, and the gas heating furnace 10 is closed. Then, the igniter 14 descends through the lifting and rotating mechanism 13 and is in full-sealing connection with the cup body 15 of the pre-reduction sintering cup, then the gas 11 is introduced through the measurement controller 12, the nitrogen gas 6 and the oxygen gas 7 are respectively introduced into the gas mixer 9 through the nitrogen gas adjusting and controlling device 5 and the oxygen gas adjusting and controlling device 8, the gas supply pressure is set to be in a high-pressure state according to the set gas components, the gas is automatically distributed through the computer acquisition control system 17 and the display measuring instrument 16, the distributed gas is heated to 300 ℃ through the gas heating furnace 10 and then is introduced into the igniter 14 for pre-reduction sintering, the temperature, the pressure and the gas components at 5 positions with equal distance between the sintering cup body 15 are fed back to the computer acquisition control system 17 as analysis data in the sintering process, after the sintering is finished, the gas 11 is closed, the gas heating furnace 10 is closed, the oxygen gas 7 and the oxygen gas adjusting and controlling device 8 are closed, and ensuring that the nitrogen 6 is introduced according to the flow required by the test through the nitrogen adjusting and controlling device 5, controlling the lifting and rotating mechanism 13 to separate the igniter 14 from the cup body 15 of the pre-reduction sintering cup after detecting that the overall temperature of the sintering ore is reduced to below 50 ℃ through the temperature measuring point arranged on the cup body, closing the nitrogen adjusting and controlling device 5 and the nitrogen 6, and finishing the pre-reduction sintering test.
Claims (2)
1. A test method of a pre-reduction sintering cup test device is characterized in that: the pre-reduction sintering cup test device comprises a pre-reduction sintering cup body, an igniter, a display measuring instrument and a computer acquisition control system, wherein the pre-reduction sintering cup body and the igniter are mutually matched and hermetically connected through a turnbuckle, and the igniter is driven by a lifting rotating mechanism; the top of the igniter is sealed and is communicated with the air inlet pipe through a rotating shaft arranged at the top; the gas inlet pipe is connected with a reducing gas inlet pipeline and a gas distribution heating system; the distribution heating system comprises a main pipeline, wherein air enters from the main pipeline, and the main pipeline is further sequentially connected with an oxygen inlet pipeline, a nitrogen inlet pipeline, a gas mixer and a gas heating furnace in the gas flowing direction; the reducing gas inlet pipeline is provided with a measurement control instrument; the main pipeline of the air distribution heating system is provided with an electromagnetic switch, a pressure measuring instrument and an air flow measuring controller; the oxygen inlet pipeline and the nitrogen inlet pipeline are respectively provided with an oxygen regulating and controlling device and a nitrogen regulating and controlling device; the reduction sintering cup body is provided with at least 3 temperature measuring points, gas component measuring points and gas pressure measuring points which comprise an upper part, a middle part and a lower part, the temperature, the pressure and the components are measured on line in real time, and data are fed back to a computer acquisition control system to form a series of charts;
the test method comprises the steps of distributing a sintering mixture into a pre-reduction sintering cup body, introducing air into a gas mixer through a computer acquisition control system, a display measuring instrument control electromagnetic switch, a pressure measuring instrument and an air flow measuring controller, heating the gas mixer to 800 ℃ by a gas heating furnace, introducing the gas into an igniter, mixing and igniting the gas with reducing gas introduced through the control of the measuring controller, closing the reducing gas after ignition, and then closing a gas distribution heating system; then, the igniter descends through a lifting rotating mechanism and is in full-sealing connection with the cup body of the pre-reduction sintering cup, reducing gas is introduced, meanwhile, nitrogen and oxygen are respectively introduced into a gas mixer through a nitrogen adjusting and controller and an oxygen adjusting and controller, automatic gas distribution is carried out through a computer acquisition control system and a display measuring instrument according to set gas components, the prepared gas is heated to 800 ℃ through a gas heating furnace and is introduced into the igniter for pre-reduction sintering, after sintering is finished, the reducing gas is closed, the gas heating furnace is closed, the oxygen and oxygen adjusting and controller are closed, the nitrogen is ensured to be introduced according to the flow required by the test through the nitrogen adjusting and controller, after the integral temperature of the sintering ore is detected to be reduced to be below 100 ℃ through a temperature measuring point arranged on the cup body, the lifting rotating mechanism is controlled to separate the igniter from the cup body of the pre-reduction sintering cup, and closing the nitrogen regulation and control device and the nitrogen, and finishing the pre-reduction sintering test.
2. The method of testing a pre-reduced fritted cup test apparatus of claim 1 wherein: the reducing gas is liquefied gas or coal gas.
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| CN201285389Y (en) * | 2008-10-24 | 2009-08-05 | 重庆科技学院 | Iron ore powder sintering cup experiment device |
| CN103512351B (en) * | 2012-06-20 | 2015-10-07 | 鞍钢股份有限公司 | Sintering device for metallized sinter and production method thereof |
| CN106282546B (en) * | 2015-06-05 | 2018-11-06 | 中冶长天国际工程有限责任公司 | A kind of smoke gas circulating type prereduction sintering process |
| CN107304460B (en) * | 2016-04-19 | 2019-10-01 | 中冶长天国际工程有限责任公司 | A kind of iron ore prereduction sintering method and its device |
| CN106498153B (en) * | 2016-09-12 | 2018-06-26 | 鞍钢股份有限公司 | Super-thick material layer pre-sintering device and using method thereof |
| CN208023071U (en) * | 2018-01-19 | 2018-10-30 | 靖江鑫润再生资源有限公司 | A kind of iron ore prereduction sintering equipment |
| CN109406560A (en) * | 2018-11-09 | 2019-03-01 | 鞍钢股份有限公司 | Oxygen-enriched sintering test device and method for sintering cup |
| CN109913640B (en) * | 2019-04-01 | 2020-05-01 | 东北大学 | Experimental device and method for reinforced sintering |
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