CN206609759U - A kind of shaft furnace furnace charge ventilation property test device - Google Patents
A kind of shaft furnace furnace charge ventilation property test device Download PDFInfo
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- CN206609759U CN206609759U CN201720218823.0U CN201720218823U CN206609759U CN 206609759 U CN206609759 U CN 206609759U CN 201720218823 U CN201720218823 U CN 201720218823U CN 206609759 U CN206609759 U CN 206609759U
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Abstract
The utility model is related to a kind of shaft furnace furnace charge ventilation property test device.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 utility model can not only detect furnace charge air permeability, while can analyze furnace charge reduction process.The utility model device is simple, and process of the test parameter can easily be accommodated, and have positive directive function to actual production.
Description
Technical field
The utility model relates generally to reduction shaft furnace field, and in particular to a kind of shaft furnace furnace charge ventilation property test device.
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 of gas permeability is expected, to provide simulation furnace charge diverse location temperature, different also Primordial Qi component and stock column pressure in stove
Under permeability test.
Utility model content
The purpose of this utility model is to provide a kind of shaft furnace furnace charge ventilation property test device, to consider iron ore in low temperature
Reduction degradation, reduction air elutriation carbon and stock column pressure these three influence factors, set up the permeability test of simulation stock column in shaft furnace
Apparatus and method, and reduction process can be evaluated by on-line gas analysis.
The utility model provide a kind of shaft furnace furnace charge ventilation property test device, described device include sample fixed cell,
Loading counterweight, sensor unit, computer system and electrothermal furnace, wherein the sample fixed cell includes shaft furnace reaction tube, lattice
Gate hole plate, alumina balls, porous graphite plate, the grid orifice plate are arranged at the bottom of tested sample in the shaft furnace reaction tube,
The alumina balls are located between the grid orifice plate and the tested sample；It is anti-that the porous graphite plate is arranged at the shaft furnace
The top of interior tested sample should be managed；The electrothermal furnace is arranged at the lateral surface of the shaft furnace reaction tube；The loading counterweight includes
What is be connected stretches into depression bar and raises the price part, it is described stretch into depression bar stretch into the shaft furnace reaction tube and with the porous graphite plate
Connection；The part of raising the price is outside the shaft furnace reaction tube；The sensor unit includes thermocouple, reducing gas and analyzed
Instrument, 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 sensor unit includes thermocouple and differential pressure transmitter, and the thermocouple stretches into depression bar through simultaneously from the loading counterweight
Insert 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
Mouth and 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 utility model considered iron ore low temperature reduction degradation, reduction air elutriation carbon and stock column pressure these three because
Influence of the element to gas permeability.The present apparatus can quantitatively react in different temperatures, be passed through different also Primordial Qi compositions, apply different
The gas permeability situation of furnace charge under stock column pressure, understanding scientific research technical staff shaft furnace middle and lower part furnace charge air permeability has positive guidance
Meaning.
The utility model can not only detect the gas permeability of furnace charge, while can be reduced by gas analyzer to furnace charge
Cheng Jinhang is analyzed.The utility model device is simple, and process of the test parameter can easily be accommodated, and is a kind of measurement shaft furnace furnace charge effective in real time
The technology of gas permeability.Shaft furnace can be judged using gas permeability change of the different ores in stove in advance using this method, it is right
Actual production has positive directive function.
Brief description of the drawings
Fig. 1 tests the apparatus structure schematic diagram of shaft furnace furnace charge air permeability for the laboratory that the utility model embodiment is provided.
Embodiment
Below in conjunction with drawings and examples, embodiment of the present utility model is described in more details, with
Just scheme of the present utility model and the advantage of its various aspects be better understood when.However, specific implementations described below
Mode and embodiment are only the purposes of explanation, rather than to limitation of the present utility model.
The purpose of this utility model is the test for providing diverse location furnace charge air permeability in a kind of laboratory simulation shaft furnace
Device, can provide simulation furnace charge diverse location temperature, the permeability test dress gone back under Primordial Qi component and stock column pressure in stove
Put 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 utility model considers iron ore in low temperature reduction degradation, reduction air elutriation carbon and stock column pressure
These three influence factors, set up the gas permeability detection method of simulation stock column in shaft furnace, and can pass through on-line gas analysis
Reduction process is evaluated.
It is specific implementation structure chart of the present utility model as shown in Figure 1.Diverse location furnace charge is saturating in laboratory simulation shaft furnace
The test device of gas mainly includes 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.
Concrete technology step of the present utility model 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.The utility model proposes research method be mainly research consider high temperature, efflorescence, furnace charge extruding
Influence factor under, the gas permeability situation of change of shaft furnace middle and lower part.Reduction shaft furnace pars infrasegmentalis temperature highest, a generally 900 DEG C left sides
The right side, therefore this method setting is that temperature range is tested from 400 DEG C to 900 DEG C, 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 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 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 the utility model example,
And the not restriction to embodiment.For those of ordinary skill in the field, may be used also on the basis of the above description
To make other changes in different forms.There is no necessity and possibility to exhaust all the enbodiments.And thus
Among the obvious changes or variations amplified out is still in protection domain of the present utility model.
Claims (4)
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720218823.0U CN206609759U (en) | 2017-03-07 | 2017-03-07 | A kind of shaft furnace furnace charge ventilation property test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720218823.0U CN206609759U (en) | 2017-03-07 | 2017-03-07 | A kind of shaft furnace furnace charge ventilation property test device |
Publications (1)
| Publication Number | Publication Date |
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| CN206609759U true CN206609759U (en) | 2017-11-03 |
Family
ID=60165803
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720218823.0U Expired - Fee Related CN206609759U (en) | 2017-03-07 | 2017-03-07 | A kind of shaft furnace furnace charge ventilation property test device |
Country Status (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116297071A (en) * | 2022-12-05 | 2023-06-23 | 马鞍山海森控电气有限公司 | Air permeability tester for casting molding sand and testing method thereof |
-
2017
- 2017-03-07 CN CN201720218823.0U patent/CN206609759U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116297071A (en) * | 2022-12-05 | 2023-06-23 | 马鞍山海森控电气有限公司 | Air permeability tester for casting molding sand and testing method thereof |
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