CN106996907A - A kind of shaft furnace furnace charge ventilation property test device and method of testing - Google Patents
A kind of shaft furnace furnace charge ventilation property test device and method of testing Download PDFInfo
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- 238000012360 testing method Methods 0.000 title claims abstract description 36
- 238000010998 test method Methods 0.000 title claims abstract description 19
- 238000009423 ventilation Methods 0.000 title claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims abstract description 94
- 238000000034 method Methods 0.000 claims abstract description 29
- 230000035699 permeability Effects 0.000 claims abstract description 25
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 16
- 239000010439 graphite Substances 0.000 claims abstract description 16
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000011946 reduction process Methods 0.000 claims abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 46
- 229910052742 iron Inorganic materials 0.000 claims description 23
- 230000008859 change Effects 0.000 claims description 6
- 235000019580 granularity Nutrition 0.000 claims description 6
- 238000004868 gas analysis Methods 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 74
- 238000006722 reduction reaction Methods 0.000 description 29
- 230000009467 reduction Effects 0.000 description 27
- 238000002474 experimental method Methods 0.000 description 11
- 238000004088 simulation Methods 0.000 description 8
- 239000000203 mixture Substances 0.000 description 6
- 239000008188 pellet Substances 0.000 description 6
- 238000005453 pelletization Methods 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 4
- 238000006731 degradation reaction Methods 0.000 description 4
- 238000006253 efflorescence Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 206010037844 rash Diseases 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 239000012141 concentrate Substances 0.000 description 3
- 239000011133 lead Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000009628 steelmaking Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 239000003034 coal gas Substances 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011504 laterite Substances 0.000 description 1
- 229910001710 laterite Inorganic materials 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 238000009781 safety test method Methods 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/0806—Details, e.g. sample holders, mounting samples for testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
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- Chemical & Material Sciences (AREA)
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- Analytical Chemistry (AREA)
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Fluid Mechanics (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
The present invention relates to a kind of shaft furnace furnace charge ventilation property test device and method of testing.Device includes sample fixed cell, loading counterweight, sensor unit, computer system and electrothermal furnace, sample fixed cell includes shaft furnace reaction tube, grid orifice plate, alumina balls, porous graphite plate, grid orifice plate is arranged at the bottom of tested sample in shaft furnace reaction tube, and alumina balls are located between grid orifice plate and tested sample；Porous graphite plate is arranged at the top of tested sample in shaft furnace reaction tube；Electrothermal furnace is arranged at the lateral surface of shaft furnace reaction tube；Sensor unit includes thermocouple and differential pressure transmitter, and computer system connects the signal output part of differential pressure transmitter.The present invention can not only detect furnace charge air permeability, while can analyze furnace charge reduction process.Apparatus of the present invention are simple, and process of the test parameter can easily be accommodated, and have positive directive function to actual production.
Description
Technical field
Present invention relates generally to reduction shaft furnace field, and in particular to a kind of shaft furnace furnace charge ventilation property test device and test side
Method.
Background technology
By the development of recent decades, direct reduction iron making technique has become a kind of important ironmaking new method.Directly
Reducing process is divided into gas base method and coal base method, wherein accounting for 76% left side of global total output using the sponge iron of gas-based shaft kiln technique productions
The right side, the main technique produced as DRI.DRI can make electric furnace steel making furnace charge and pneumatic steelmaking cooling agent,
Blast furnace is can also be used for, coke ratio is reduced.When DRI makees pneumatic steelmaking cooling agent, compared with steel scrap, its cooling effect is useless
1.5-2.0 times of steel, and without non-ferrous metal impurity such as copper, aluminium, lead, zinc, tin.
Reduction of iron ore process in shaft furnace is that a variety of chemistry occurred during furnace charge and coal gas countercurrent movement are anti-
Should and physical change.With the progress of smelting technique, the complicated ores such as Metal In Shaft Furnace schreyerite, lateritic nickel ore, high phosphorus ore are developed
Technique.Furnace charge efflorescence in gas-based shaft kiln reduction process and the major issue that bondings is in the technique, furnace charge efflorescence and glue
Form block and not only influence whether normal discharge, can also influence the gas permeability of furnace charge in shaft furnace.And the ventilative implementations of furnace charge can
Reflect during Metal In Shaft Furnace, coal gas flows through the fluctuation situation and its change of the complexity of furnace charge layer, gas in furnace charge layer
Law, embodies the quality of situation in stove, has influence on the degree of metalization of shaft furnace sponge iron, further the consumption of influence also Primordial Qi
Amount.
The e measurement technology of some existing analog blast furnace diverse location lump zone gas permeabilities, but without suitable for different operating
The measurement of shaft furnace furnace charge air permeability under parameter.Meanwhile, existing e measurement technology do not account in stove furnace charge during decline by
Cause furnace charge loading softening is deformed and bonded to cause stock column resistance is damaged to increase this influence factor in top furnace charge pressure.
Therefore, in view of the deficienciess of the prior art, being necessary to provide diverse location stove in a kind of laboratory simulation shaft furnace
The test device and corresponding method of testing of gas permeability are expected, to provide simulation furnace charge diverse location temperature, different reduction in stove
Permeability test under gas component and stock column pressure.
The content of the invention
It is an object of the invention to provide a kind of shaft furnace furnace charge ventilation property test device and method of testing, to consider iron ore
In low temperature reduction degradation, reduction air elutriation carbon and stock column pressure these three influence factors, set up simulation in shaft furnace stock column it is ventilative
System safety testing device and method, and reduction process can be evaluated by on-line gas analysis.
The invention provides a kind of shaft furnace furnace charge ventilation property test device, described device includes sample fixed cell, loading
Counterweight, sensor unit, computer system and electrothermal furnace, wherein the sample fixed cell includes shaft furnace reaction tube, grate opening
Plate, alumina balls, porous graphite plate, the grid orifice plate are arranged at the bottom of tested sample in the shaft furnace reaction tube, described
Alumina balls are located between the grid orifice plate and the tested sample；The porous graphite plate is arranged at the shaft furnace reaction tube
The top of interior tested sample；The electrothermal furnace is arranged at the lateral surface of the shaft furnace reaction tube；The loading counterweight includes being connected
What is connect stretches into depression bar and part of raising the price, and the depression bar that stretches into is stretched into the shaft furnace reaction tube and connected with the porous graphite plate
Connect；The part of raising the price is outside the shaft furnace reaction tube；The sensor unit include thermocouple, reducing gas analyzer,
Differential pressure transmitter, the thermocouple is from the center that depression bar passes through and inserts tested sample of stretching into of the loading counterweight；Institute
Sensor unit is stated including thermocouple and differential pressure transmitter, the thermocouple is passed through and inserted from the depression bar that stretches into of the loading counterweight
Enter the center of tested sample；The signal input part of the differential pressure transmitter connects the air inlet of the shaft furnace reaction tube respectively
With gas outlet；The computer system connects the signal output part of the differential pressure transmitter.
Above-mentioned test device, it is anti-that the signal input part of the differential pressure transmitter is respectively connecting to the shaft furnace by sebific duct
Should pipe air inlet and gas outlet connection reaction pipe joint.
Above-mentioned test device, described device also includes gas cylinder and air chest, and the gas access end of the air chest is connected
The gas cylinder, the gas outlet end of the air chest connects the air inlet of the shaft furnace reaction tube.
Above-mentioned test device, the electrothermal furnace is one group of resistance furnace, is symmetricly set in the both sides of the shaft furnace reaction tube
Side；The sensor unit also includes reducing gas analyzer, and the signal input part connection of the reducing gas analyzer is described
The gas outlet of shaft furnace reaction tube；The signal output part of the reducing gas analyzer connects the computer system.
The present invention also provides a kind of method of testing using above-mentioned test device, the described method comprises the following steps：
Make the electrothermal furnace that the temperature of tested sample in the shaft furnace reaction tube is heated into 400 DEG C -700 DEG C, to described
Also Primordial Qi H is passed through in shaft furnace reaction tube2、CO、CH4、N2And CO2, make the loading counterweight load counterweight there is provided tested sample at
Pressure when medium position in stove；
Make the electrothermal furnace that the temperature of tested sample in the shaft furnace reaction tube is heated into 700 DEG C -900 DEG C, to described
Also Primordial Qi H is passed through in shaft furnace reaction tube2、CO、CH4And N2, the loading counterweight loading counterweight is in stove there is provided tested sample
Pressure when low inside is put；
After 900 DEG C, make to keep constant temperature, constant loading pressure in the shaft furnace reaction tube；
The shaft furnace reaction tube air inlet and the pressure difference of gas outlet are detected by the differential pressure transmitter in real time, by calculating
Machine system records the data of the differential pressure transmitter collection, pressure difference value P=P when acquisition starts ventilation with off-test in real timeEventually-
PBegin, obtain the gas permeability situation of change of tested sample in the shaft furnace reaction tube.
When the temperature of tested sample is heated to 400 DEG C -700 DEG C in above-mentioned method of testing, the shaft furnace reaction tube, lead to
Enter also Primordial Qi H2、CO、CH4、N2And CO2Volume ratio be 40%：24%：2%：23%：11%.
When the temperature of tested sample is heated to 700 DEG C -900 DEG C in above-mentioned method of testing, the shaft furnace reaction tube, lead to
Enter also Primordial Qi H2、CO、CH4And N2Volume ratio be 52%：33%：3%：12%.
Above-mentioned method of testing, when the tested sample is in medium position in stove, causes the shaft furnace during loading counterweight
Loading quality is 0.5kg/cm above reaction tube2。
Above-mentioned method of testing, the tested sample in stove low inside put when, loading counterweight when cause the shaft furnace
Loading quality is 1kg/cm above reaction tube2。
Above-mentioned method of testing, the tested sample is the iron ore that 500g granularities are 10-12.5mm；Methods described is also wrapped
Include：Tail gas is produced to reduction process to be analyzed in real time, remembered in real time by computer system using the reducing gas analyzer
Record the data of the reducing gas analyzer collection.
The present invention has considered iron ore in low temperature reduction degradation, reduction air elutriation carbon and stock column pressure these three factors pair
The influence of gas permeability.The present apparatus can quantitatively react in different temperatures, be passed through the difference also different stock columns of Primordial Qi compositions, application
The gas permeability situation of furnace charge under pressure, understanding scientific research technical staff shaft furnace middle and lower part furnace charge air permeability has positive guidance to anticipate
Justice.
The present invention can not only detect the gas permeability of furnace charge, while can be entered by gas analyzer to furnace charge reduction process
Row analysis.Apparatus of the present invention are simple, and process of the test parameter can easily be accommodated, and are a kind of measurement shaft furnace furnace charge air permeabilities effective in real time
Technology.Shaft furnace can be judged using gas permeability change of the different ores in stove in advance using this method, to actual production
With positive directive function.
Brief description of the drawings
Fig. 1 is the apparatus structure schematic diagram that shaft furnace furnace charge air permeability is tested in laboratory provided in an embodiment of the present invention.
Embodiment
Below in conjunction with drawings and examples, the embodiment to the present invention is described in more details, so as to energy
Enough more fully understand the solution of the present invention and the advantage of its various aspects.However, specific embodiments described below and reality
Apply the purpose that example is only explanation, rather than limitation of the present invention.
It is an object of the invention to provide a kind of test device of diverse location furnace charge air permeability in laboratory simulation shaft furnace
And corresponding method of testing, can provide simulation furnace charge in stove diverse location temperature, also under Primordial Qi component and stock column pressure
Ventilation property test device and method of testing.
Iron ore enters after stove, and efflorescence can be occurred by carrying out low-temperature reduction on shaft furnace top, while there is reduction air elutriation carbon behavior.
In reduction pars infrasegmentalis, under high temperature and larger stock column pressure, iron ore is understood softening transform, is bonded together so that furnace charge space
Degree diminishes, gas permeability reduction.Thus the present invention consider iron ore low temperature reduction degradation, reduction air elutriation carbon and stock column pressure this three
Individual influence factor, sets up the gas permeability detection method of simulation stock column in shaft furnace, and can be by on-line gas analysis pair also
Former process is evaluated.
It is as shown in Figure 1 the specific implementation structure chart of the present invention.Diverse location furnace charge air permeability in laboratory simulation shaft furnace
Test device mainly include sample fixed cell, loading counterweight, sensor unit, computer system and electrothermal furnace.
Wherein, sample fixed cell includes shaft furnace reaction tube 3, grid orifice plate 4, alumina balls 5, porous graphite plate 7.
Grid orifice plate 4 is arranged at the bottom of tested sample in shaft furnace reaction tube 3, is in order to for supporting upper sample.
The alumina balls 5 are located between the grid orifice plate 4 and the tested sample 6, are to prevent sample reduction
It is be bonded with metallic grid orifice plate 4 afterwards.
The porous graphite plate 7 is arranged at the top of tested sample 6 in the shaft furnace reaction tube 3, is to ensure loading
By depression bar, the stepless action of porous graphite plate 7 on specimen surface.
In order to be heated to the tested sample 6 in shaft furnace reaction tube 3, to simulate the reduction reaction of iron ore in shaft furnace,
The lateral surface of shaft furnace reaction tube is provided with electrothermal furnace 8, and electrothermal furnace 8 is to use Resistant heating.
Loading counterweight 10 stretches into depression bar and part of raising the price including what is be connected, stretches into depression bar and stretches into shaft furnace reaction tube 3 simultaneously
It is connected with porous graphite plate 7；Part raise the price outside shaft furnace reaction tube 3, to facilitate loading counterweight, to be produced to tested sample
Different pressure.
The sensor unit includes thermocouple 9, reducing gas analyzer 11, differential pressure transmitter 13, for anti-to shaft furnace
The emission measuring that the pressure difference parameter of interior tested sample should be managed and reacted, pressure difference value P during by starting ventilation with off-test
=PEventually-PBegin, obtain the gas permeability index of tested sample in shaft furnace reaction tube.
Thermocouple 9 is from the center that depression bar passes through and inserts tested sample of stretching into of loading counterweight 10, for surveying in real time
Measure the temperature of tested sample.
The signal input part of differential pressure transmitter 13 connects air inlet and the gas outlet of the shaft furnace reaction tube respectively, for surveying
Measure the pressure difference between air inlet and gas outlet in process of the test.
The gas outlet of the signal input part connection shaft furnace reaction tube 3 of reducing gas analyzer 11.
It can specifically be connected in the air inlet of shaft furnace reaction tube 3 with setting near gas outlet and react pipe joint, connected by sebific duct
Differential pressure transmitter 13 is connected to, and gas outlet is discharged gas and is passed through reducing gas analyzer 11., can be by calculating in process of the test
The data that record differential pressure transmitter 13 is gathered with reducing gas analyzer 11 in real time of machine system 12.Computer system connects difference respectively
The signal output part of pressure transmitter and the signal output part of reducing gas analyzer.
During in order to consider that tested sample is in different shaft furnace positions and temperature, reduction reaction gas componant is different, Hai Xu
Tested sample is passed through different also Primordial Qi into shaft furnace reaction tube when being in different shaft furnace positions.Thus test device also includes gas
Bottle 1 and air chest 2, the gas access end connection gas cylinder 1 of air chest 2, the gas outlet end connection shaft furnace reaction tube 3 of air chest 2
Air inlet.Gas cylinder is the different reduction gas cylinder of one group of composition, concentrates the gas of different also Primordial Qi proportionings after air chest 2
To input gas all the way, the air inlet of shaft furnace reaction tube 3 is delivered to.
The concrete technology step of the present invention is as described below.
Grid orifice plate 4 is loaded in shaft furnace reaction tube 3 first before test, alumina balls 5 are reloaded into.
The iron ore sample 6 for being 10-12.5mm with 500g granularities will be tested to load in reaction tube 3.On iron ore sample
Portion is put into porous graphite plate 7, sample center will be inserted in the thermocouple 9 for stretching into depression bar center, then by reaction tube 3
Portion covers sealing.
Front simulation shaft furnace diverse location loading is tested, the loading rule of loading counterweight 10 is determined, to provide furnace charge in difference
Pressure meets pressure condition of the iron ore in different reduction phases in true shaft furnace during the band of position.
Pipe joint is reacted into the connection set near the air inlet of reaction tube 3 and gas outlet, being connected to differential pressure by sebific duct becomes
Device 13 is sent, gas connection is discharged to reducing gas analyzer 11 in gas outlet.And make differential pressure transmitter 13 and reducing gas analyzer
11 connect computer system 12, in process of the test, to record differential pressure transmitter 13 in real time by computer system 12 with going back
The data of raw-gas analyzer 11.
Due to the generation reduction degradation of (400 DEG C -600 DEG C) of iron ore experience low-temperature reduction area, powder and analysis carbon are produced, most
Furnace charge air permeability can be influenceed eventually.Research method proposed by the present invention is mainly that research is considering the shadow that high temperature, efflorescence, furnace charge are extruded
Under the factor of sound, the gas permeability situation of change of shaft furnace middle and lower part.Reduction shaft furnace pars infrasegmentalis temperature highest, generally 900 DEG C or so, because
The setting of this this method is that temperature range is tested from 400 DEG C to 900 DEG C, and heating rate is 5 DEG C/min.
In 400 DEG C of -700 DEG C of temperature ranges, iron ore is in medium position in shaft furnace, therefore is passed through also Primordial Qi composition
For：40%H2+ 24%CO+2%CH4+ 23%N2+ 11%CO2, gas flow is 15L/min.Loading quality is above reaction tube
0.5kg/cm2.For the loading quality on per unit square centimeter, the gross area should be reaction tube sectional area.
In 700 DEG C of -900 DEG C of temperature ranges, iron ore is located substantially on reduction shaft furnace pars infrasegmentalis, be now passed through also Primordial Qi into
It is divided into：52%H2+ 33%CO+3%CH4+ 12%N2, gas flow is 15L/min.Loading quality is 1kg/ above reaction tube
cm2。
Ore temperature is risen to after 900 DEG C, is carried out constant temperature, constant loading pressure and is continued to adopt data progress record in reaction tube
Stop experiment after collection, 2h.
During logical also Primordial Qi, tail gas is produced to reduction process using reducing gas analyzer 11 and analyzed in real time, is examined
Survey ore reduction process.
Embodiment 1
The high grade iron concentrate acid pellet that experiment is 10-12.5mm with 500g granularities, shaft furnace reaction tube diameter is 6cm,
Iron ore pellets are reloaded into after installing grid orifice plate and alumina balls in advance in shaft furnace reaction tube.Put on pelletizing sample top
Enter porous graphite plate, thermocouple is inserted into pelletizing sample center, reaction tube top is then covered into sealing, then by reaction tube
It is put into high temperature furnace burner hearth.According to shown in Fig. 1, connecting air intake apparatus, differential pressure transmitter, reduction qi leel analyzer and meter respectively
Calculation machine acquisition system.Complete after every preparation, open each gas cylinder valve, open each system software of computer and proceed by examination
Test.Furnace charge is heated to 400 DEG C with 10 DEG C/min speed by electrothermal furnace first, 5L/min N is during which passed through2Protected；
In 400 DEG C of -700 DEG C of temperature ranges, iron ore is in medium position in shaft furnace, changes logical also Primordial Qi composition and is：40%H2+ 24%
CO+2%CH4+ 23%N2+ 11%CO2, gas flow is 15L/min, and loading counterbalance mass is 14kg above reaction tube, and the time is
2 hours；Temperature is risen to after 700 DEG C, and gas, which changes, to be led to for 52%H2+ 33%CO+3%CH4+ 12%N2, gas flow is
15L/min.Loading counterbalance mass is 28kg above reaction tube；2 hours temperature rise to 900 DEG C by 700 DEG C, carry out permanent
Warm, constant loading continues to carry out data in reaction tube record collection, then carries out stopping experiment after 2 hours.
By test, when measuring 400 DEG C and just starting logical also Primordial Qi, pressure difference P is measuredBeginFor 714Pa, when 900 DEG C of constant temperature two
P is obtained after hourEventuallyFor 1231Pa, it is known that P is 517Pa before and after experiment reaction, it can be used as and judge the ore in perpendicular furnace reduction
The index of process furnace charge air permeability.
Embodiment 2
The laterite nickel ore oxidized pellet that experiment is 10-12.5mm with 500g granularities, shaft furnace reaction tube diameter is 6cm, perpendicular
Installed in advance in stove reaction tube and the acid pellet is reloaded into after grid orifice plate and alumina balls.It is put on pelletizing sample top many
Hole graphite cake, inserts pelletizing sample center by thermocouple, reaction tube top then is covered into sealing, then reaction tube is put into
In high temperature furnace burner hearth.According to shown in Fig. 1, connecting air intake apparatus, differential pressure transmitter, reduction qi leel analyzer and computer respectively
Acquisition system.Complete after every preparation, open each gas cylinder valve, open each system software of computer and proceed by experiment.
Furnace charge is heated to 400 DEG C with 10 DEG C/min speed by electrothermal furnace first, 5L/min N is during which passed through2Protected；400
In DEG C -700 DEG C of temperature ranges, iron ore is in medium position in shaft furnace, changes logical also Primordial Qi composition and is：40%H2+ 24%CO+
2%CH4+ 23%N2+ 11%CO2, gas flow is that loading counterbalance mass is 14kg above 15L/min, reaction tube, and the time is 2 small
When；Temperature is risen to after 700 DEG C, and gas, which changes, to be led to for 52%H2+ 33%CO+3%CH4+ 12%N2, gas flow is 15L/min.Instead
Should loading counterbalance mass be 28kg above pipe；2 hours temperature rise to 900 DEG C by 700 DEG C, carry out constant temperature, constant loading continuation pair
Data carry out record collection in reaction tube, then carry out stopping experiment after 2 hours.
By test, when measuring 400 DEG C and just starting logical also Primordial Qi, pressure difference P is measuredBeginFor 802Pa, when 900 DEG C of constant temperature two
P is obtained after hourEventuallyFor 1524Pa, it is known that P is 722Pa before and after experiment reaction, it can be used as and judge the ore in perpendicular furnace reduction
The index of process furnace charge air permeability.
Embodiment 3
The sefstromite concentrate acid pellet that experiment is 10-12.5mm with 500g granularities, shaft furnace reaction tube diameter is 6cm,
Installed in advance in shaft furnace reaction tube and the acid pellet is reloaded into after grid orifice plate and alumina balls.It is put on pelletizing sample top
Porous graphite plate, inserts pelletizing sample center by thermocouple, reaction tube top then is covered into sealing, then reaction tube is put
Enter in high temperature furnace burner hearth.According to shown in Fig. 1, connecting air intake apparatus, differential pressure transmitter, reduction qi leel analyzer and calculating respectively
Machine acquisition system.Complete after every preparation, open each gas cylinder valve, open each system software of computer and proceed by examination
Test.Furnace charge is heated to 400 DEG C with 10 DEG C/min speed by electrothermal furnace first, 5L/min N is during which passed through2Protected；
In 400 DEG C of -700 DEG C of temperature ranges, iron ore is in medium position in shaft furnace, changes logical also Primordial Qi composition and is：40%H2+ 24%
CO+2%CH4+ 23%N2+ 11%CO2, gas flow is 15L/min, and loading counterbalance mass is 14kg above reaction tube, and the time is
2 hours；Temperature is risen to after 700 DEG C, and gas, which changes, to be led to for 52%H2+ 33%CO+3%CH4+ 12%N2, gas flow is 15L/min.
Loading counterbalance mass is 28kg above reaction tube；2 hours temperature rise to 900 DEG C by 700 DEG C, carry out constant temperature, constant loading and continue
Data in reaction tube are carried out with record collection, then carries out stopping experiment after 2 hours.
By test, when measuring 400 DEG C and just starting logical also Primordial Qi, pressure difference P is measuredBeginFor 723Pa, when 900 DEG C of constant temperature two
P is obtained after hourEventuallyFor 1106Pa, it is known that P is 383Pa before and after experiment reaction, it can be used as and judge the ore in perpendicular furnace reduction
The index of process furnace charge air permeability.
Finally it should be noted that：Obviously, above-described embodiment is only intended to clearly illustrate example of the present invention, and simultaneously
The non-restriction to embodiment.For those of ordinary skill in the field, it can also do on the basis of the above description
Go out other various forms of changes or variation.There is no necessity and possibility to exhaust all the enbodiments.And thus drawn
Among the obvious changes or variations that Shen goes out is still in protection scope of the present invention.
Claims (10)
1. a kind of shaft furnace furnace charge ventilation property test device, it is characterised in that described device includes sample fixed cell, loading weight
Code, sensor unit, computer system and electrothermal furnace,
Wherein described sample fixed cell includes shaft furnace reaction tube, grid orifice plate, alumina balls, porous graphite plate,
The grid orifice plate is arranged at the bottom of tested sample in the shaft furnace reaction tube, and the alumina balls are located at the grid
Between orifice plate and the tested sample；
The porous graphite plate is arranged at the top of tested sample in the shaft furnace reaction tube；
The electrothermal furnace is arranged at the lateral surface of the shaft furnace reaction tube；
The loading counterweight stretches into depression bar and part of raising the price including what is be connected, and the depression bar that stretches into stretches into the shaft furnace reaction tube
It is interior and be connected with the porous graphite plate；The part of raising the price is outside the shaft furnace reaction tube；
The sensor unit includes thermocouple and differential pressure transmitter,
The thermocouple is from the center that depression bar passes through and inserts tested sample of stretching into of the loading counterweight；
The signal input part of the differential pressure transmitter connects air inlet and the gas outlet of the shaft furnace reaction tube respectively；
The computer system connects the signal output part of the differential pressure transmitter.
2. test device according to claim 1, it is characterised in that the signal input part of the differential pressure transmitter passes through glue
Pipe is respectively connecting to the air inlet of the shaft furnace reaction tube and the connection reaction pipe joint of gas outlet.
3. test device according to claim 1, it is characterised in that described device also includes gas cylinder and air chest, described
The gas access end of air chest connects the gas cylinder, and the gas outlet end of the air chest connects the air inlet of the shaft furnace reaction tube
Mouthful.
4. test device according to claim 1, it is characterised in that the electrothermal furnace is one group of resistance furnace, is symmetrical arranged
In two sides of the shaft furnace reaction tube；The sensor unit also includes reducing gas analyzer, the reducing gas analysis
The signal input part of instrument connects the gas outlet of the shaft furnace reaction tube；The signal output part connection institute of the reducing gas analyzer
State computer system.
5. a kind of method of testing of any one of utilization claim 1 to 5 test device, it is characterised in that methods described bag
Include following steps：
Make the electrothermal furnace that the temperature of tested sample in the shaft furnace reaction tube is heated into 400 DEG C -700 DEG C, to the shaft furnace
Also Primordial Qi H is passed through in reaction tube2、CO、CH4、N2And CO2, the loading counterweight loading counterweight is in stove there is provided tested sample
Pressure during interior medium position；
Make the electrothermal furnace that the temperature of tested sample in the shaft furnace reaction tube is heated into 700 DEG C -900 DEG C, to the shaft furnace
Also Primordial Qi H is passed through in reaction tube2、CO、CH4And N2, make under loading counterweight loading counterweight is in stove there is provided tested sample
Pressure during portion position；
After 900 DEG C, make to keep constant temperature, constant loading pressure in the shaft furnace reaction tube；
The shaft furnace reaction tube air inlet and the pressure difference of gas outlet are detected by the differential pressure transmitter in real time；
Record the data of the differential pressure transmitter collection in real time by computer system, obtain when starting ventilation with off-test
Pressure difference value P=PEventually-PBegin, obtain the gas permeability situation of change of tested sample in the shaft furnace reaction tube.
6. method of testing according to claim 5, it is characterised in that the temperature quilt of tested sample in the shaft furnace reaction tube
When being heated to 400 DEG C -700 DEG C, also Primordial Qi H is passed through2、CO、CH4、N2And CO2Volume ratio be 40%：24%：2%：23%：
11%.
7. method of testing according to claim 5, it is characterised in that the temperature quilt of tested sample in the shaft furnace reaction tube
When being heated to 700 DEG C -900 DEG C, also Primordial Qi H is passed through2、CO、CH4And N2Volume ratio be 52%：33%：3%：12%.
8. method of testing according to claim 5, it is characterised in that when the tested sample is in medium position in stove,
Cause that loading quality is 0.5kg/cm above the shaft furnace reaction tube during loading counterweight2。
9. method of testing according to claim 5, it is characterised in that the tested sample in stove low inside put when,
Cause that loading quality is 1kg/cm above the shaft furnace reaction tube during loading counterweight2。
10. method of testing according to claim 5, it is characterised in that the tested sample is that 500g granularities are 10-
12.5mm iron ore；Methods described also includes：Tail gas is produced using the reducing gas analyzer to reduction process to carry out in fact
When analyze, record the data of reducing gas analyzer collection in real time by computer system.
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| CN201710132206.3A CN106996907A (en) | 2017-03-07 | 2017-03-07 | A kind of shaft furnace furnace charge ventilation property test device and method of testing |
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| CN201710132206.3A CN106996907A (en) | 2017-03-07 | 2017-03-07 | A kind of shaft furnace furnace charge ventilation property test device and method of testing |
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| CN108020495A (en) * | 2018-02-05 | 2018-05-11 | 中钢集团洛阳耐火材料研究院有限公司 | A kind of high temperature venting degree tester and its test method |
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| CN109991043A (en) * | 2017-12-31 | 2019-07-09 | 中国人民解放军63653部队 | Differential pressure type based on high-temperature tubular atmosphere furnace takes gas measuring system |
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| CN109991043A (en) * | 2017-12-31 | 2019-07-09 | 中国人民解放军63653部队 | Differential pressure type based on high-temperature tubular atmosphere furnace takes gas measuring system |
| CN108020495A (en) * | 2018-02-05 | 2018-05-11 | 中钢集团洛阳耐火材料研究院有限公司 | A kind of high temperature venting degree tester and its test method |
| CN108020495B (en) * | 2018-02-05 | 2023-04-25 | 中钢集团洛阳耐火材料研究院有限公司 | High-temperature air permeability tester and test method thereof |
| CN109556777A (en) * | 2018-11-27 | 2019-04-02 | 武汉钢铁有限公司 | It is a kind of that for testing, blast furnace is same radially soft to melt the device and application method that iron charge influences gas phase drag |
| CN109991125A (en) * | 2019-05-16 | 2019-07-09 | 重庆大学 | A kind of pressure swing type soft melting dropping performance test method and equipment |
| CN109991125B (en) * | 2019-05-16 | 2022-09-23 | 重庆大学 | Method and equipment for testing variable-pressure type reflow dripping performance |
| CN112941262A (en) * | 2021-01-29 | 2021-06-11 | 钢铁研究总院 | Gas-based reduction simulation device and gas-based reduction simulation method |
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