CN106092813A - A kind of Thermal Properties of Coke determinator and method - Google Patents
A kind of Thermal Properties of Coke determinator and method Download PDFInfo
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- CN106092813A CN106092813A CN201610415711.4A CN201610415711A CN106092813A CN 106092813 A CN106092813 A CN 106092813A CN 201610415711 A CN201610415711 A CN 201610415711A CN 106092813 A CN106092813 A CN 106092813A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
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Abstract
The invention belongs to chemical metallurgy technical field, be specifically related to a kind of Thermal Properties of Coke determinator and method.This device includes distributing instrument, electric furnace, reactor, electronic weighing device and tails assay device, reactor by link coupled reaction device and is weighed by electronic weighing device, distributing instrument passes through air inlet pipe coupled reaction device, for providing coke reactivity gas to reactor, reactor connects tails assay device by escape pipe, for providing reaction end gas to tails assay device, coke reactivity gas controller connects nitrogen feeder, carbon dioxide feeder, carbon monoxide feeder and hydrogen feeder.By this device in addition to measuring coke reactivity with GB GB/T4000 2008 experimental standard with constant temperature, it is also possible to measure its reactivity worth in coke temperature-rise period, coke and pure CO both can be measured2Reactivity, can be again that coke is at blast furnace gas atmosphere i.e. CO, CO2、H2O、H2And N2Reactivity under the atmosphere combined by a certain percentage.
Description
Technical field
The invention belongs to chemical metallurgy technical field, be specifically related to a kind of Thermal Properties of Coke determinator and method.
Background technology
Along with the development of ironmaking technology, in blast furnace process, the prescription of STRENGTH ON COKE is more and more higher, and Thermal Properties of Coke
It is to affect the key factor that coke quality is good and bad.At present, Thermal Properties of Coke mainly measures according to GB GB/T4000-2008,
But it is 1100 DEG C that this standard fixes reaction temperature, CO in reacting gas2It is 100%, it is impossible to complete to simulate coke in blast furnace
Response situation.And the temperature measured is constant, it is impossible to draw the coke reactivity under different temperatures.Blast furnace gas contains
There is N2、CO2、CO、H2And steam, therefore if able to adjust reacting gas proportioning, and adjusting reaction temperature, experiment obtains
Thermal Properties of Coke more can react the truth of blast furnace.
Blast furnace all have employed the operation of big coal injection at present, owing to the hydrogen content in coal dust is higher, along with the increase of coal ratio, coal
Hydrogen content in gas is consequently increased, so, the impact of the measurement hydrogen to be considered of coke reactivity.Current existing coke gasification reaction
Property detection equipment all detect under the influence of steam not considering in coal gas, and for the gas componant in course of reaction
Unclear.So the shortcoming of existing detection equipment be cannot coal gas environment in approximate simulation blast furnace, testing result can not generation completely
Table coke practical situation in blast furnace, the detection of STRENGTH ON COKE hot property is the most comprehensive.
Summary of the invention
For solving the deficiencies in the prior art, the invention provides a kind of Thermal Properties of Coke determinator and method, in order to
Preferably detect coke reactivity.
A kind of Thermal Properties of Coke determinator, including distributing instrument, electric furnace, the reactor being arranged in described electric furnace, electronics
Weighing device and tails assay device, described electronic weighing device connects described reactor and to described reactor by link
Weighing, described distributing instrument connects described reactor by air inlet pipe, for providing coke reactivity gas to described reactor
Body, described reactor connects described tails assay device by escape pipe, for providing reaction tail to described tails assay device
Gas, described distributing instrument is also associated with nitrogen feeder, carbon dioxide feeder, carbon monoxide feeder and hydrogen supply
Device.
The link of reactor is connected by spring with reactor.
Further, described Thermal Properties of Coke determinator also includes gasify controller and gasification furnace, and described gasification furnace is even
Connecing described gasification controller, for providing steam to described gasification controller, described gasification controller connects described reactor,
For providing steam to described reactor.
Concrete, described gasification furnace include the distilled water storage device being sequentially connected in series, constant flow pump, water inlet pipe, add heat pipe and
Steam discharges capillary tube, and described steam is discharged capillary tube and connected described gasification controller.Constant flow pump accurately controls distilled water flow
And water is conveyed into continually and steadily adds in heat pipe.
Concrete, tetrafluoro sampling tube that described tails assay device includes being sequentially connected in series, the first dehumidifier, sampling pump, the
Two dehumidifiers and infrared gas analysis meter.
Concrete, the described gasification that the air inlet pipe of described reactor connects described distributing instrument respectively by tee T controls
Instrument.
Further, described Thermal Properties of Coke determinator also includes computer measurement and control device, described computer measurement and control
Device electrically connects described distributing instrument, for controlling composition and the gas output of described coke reactivity gas；Described computer measurement and control
Device electrically connects described gasification controller, for controlling the gas output of described gasification controller；Described computer measurement and control device electricity
Connect described constant flow pump, for controlling the output of described constant flow pump；Heat pipe is added described in the electrical connection of described computer measurement and control device,
Add the heating-up temperature of heat pipe described in control；Described computer measurement and control device electrically connects described electronic weighing device, is used for surveying
Measure the weight change of described reactor；Described computer measurement and control device electrically connects described infrared gas analysis meter, is used for detecting tail
Gas forms.
Computer measurement and control device can control heating rate and gas flow, and whole process is realized automatic measurement and control
System.
Thermal Properties of Coke determinator provided by the present invention is equipped with gasification furnace, it is contemplated that blast furnace gas is aqueous, therefore
Can input water, analog blast furnace includes nitrogen atmosphere.Heating rate, gas flow can be arranged according to blast furnace practical situation voluntarily,
Simulation coke practical situation in blast furnace more really.Gas after coke gasification reaction can pass through tails assay device analysis
Go out composition, tail gas and response situation more comprehensively can be analyzed detection.This device can measure the coke under different temperatures
Reactivity, and coke reactivity can be measured in temperature-rise period, gas controller can realize the Ring of different ratio
Border, more conforms to the complex situations in blast furnace.
Present invention also offers a kind of Thermal Properties of Coke assay method, survey including with Thermal Properties of Coke provided by the present invention
Determine the following steps that device is carried out:
1) by the sampling method of GB GB/T4000-2008, coke specimen is prepared, then by sample at 175～185 DEG C
At a temperature of be dried 1.5～2.5h, be cooled to room temperature after taking-up standby.
2) put into flat sieve plate at reactor bottom, make coke be positioned at when putting into reactor at the some high aluminium balls in sieve plate upper berth
In the flat-temperature zone of electric furnace, dried coke specimen is weighed 200 ± 0.5g, put into reactor and recorded the granule of coke
Number.
3) controlling electricity in-furnace temperature to heat up, when being warming up to 400 DEG C, controlling distributing instrument provides nitrogen to protect to reactor
Protect, control gasifier operation and heat.
4) control electricity in-furnace temperature to heat up, be warming up to less than preset temperature value 45～when 55 DEG C, control distributing instrument to dioxy
Change carbon etc. to preheat.
5) control electricity in-furnace temperature to heat up, be warming up to preset temperature value, temperature stabilization 8～after 12 minutes, control distributing instrument
Cut off nitrogen and also provide at carbon dioxide and steam to reactor, with specimen reaction 1.5～2.5 hours.
6), after reaction terminates, control distributing instrument and cut off carbon dioxide etc. and provide nitrogen to protect to reactor；Control
Constant flow pump quits work.
Further, measure the weight change of described reactor after being warming up to preset temperature value, carry out coke under constant temperature
The mensuration of hot property；Measure the weight change of described reactor before and after the temperature range of any one end before being warming up to preset temperature value
Change, carry out the mensuration of Thermal Properties of Coke in temperature-rise period.
Concrete, described preset temperature value is the arbitrary temp value more than or equal to 900 DEG C and less than or equal to 1200 DEG C.
Concrete, step 5) in: carbon dioxide, carbon monoxide, hydrogen, nitrogen and steam are combined into according to any proportioning
Reacting gas, reaction gas flow is the arbitrary value less than or equal to 5.0L/min.
Thermal Properties of Coke assay method provided by the present invention can measure coke difference to fixed temperature (900,1000,
1100 DEG C etc.) under reactivity, except measuring in addition to coke reactivity with constant temperature with GB GB/T4000-2008 experimental standard,
Its reactivity worth can also be measured in coke temperature-rise period, owing to used device is furnished with gas controller, can prepare
Different gaseous environments, therefore its reactivity worth is not only coke and pure CO2Reaction, and can also is that coke is at blast furnace gas
Atmosphere i.e. CO, CO2、H2O、H2And N2Reactivity under the atmosphere combined by a certain percentage.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of Thermal Properties of Coke determinator provided by the present invention.
Fig. 2 is the structural representation of the gasification furnace of Thermal Properties of Coke determinator provided by the present invention.
Fig. 3 is the structural representation of the tails assay device of Thermal Properties of Coke determinator provided by the present invention.
In accompanying drawing 1,2,3, the list of parts representated by each label is as follows:
1, electric furnace, 2, reactor, 3, electronic weighing device, 4, computer measurement and control device, 5, gasification furnace, 6, gasification controls
Instrument, 7, distributing instrument, 8, air inlet pipe, 9, escape pipe, 10, tails assay device, 11, thermocouple, 12, nitrogen feeder, 13, two
Carbonoxide feeder, 14, carbon monoxide feeder, 15, hydrogen feeder, 16, distilled water storage device, 17, constant current
Pump, 18, water inlet pipe, 19, add heat pipe, 20, steam discharge capillary tube, 21, tetrafluoro sampling tube, the 22, first dehumidifier, 23, sampling
Pump, 24, infrared gas analysis meter, the 25, second dehumidifier.
Detailed description of the invention
Principle and feature to the present invention are described below, and illustrated embodiment is served only for explaining the present invention, is not intended to
Limit the scope of the present invention.
In a detailed description of the invention, as it is shown in figure 1, a kind of Thermal Properties of Coke determinator, including distributing instrument 7, gas
Change controller 6, gasification furnace 5, electric furnace 1, the reactor 2 being arranged in electric furnace 1, electronic weighing device 3 and tails assay device
10, reactor 2 by link coupled reaction device 2 and is weighed by electronic weighing device 3, and the link of reactor leads to reactor
Crossing spring to connect, reactor 2 is provided with thermocouple 11.
Distributing instrument 7, is used for providing coke reactivity gas to reactor 2 by air inlet pipe 8 coupled reaction device 2 via tee T
Body.Gasification controller 6 also passes through air inlet pipe 8 coupled reaction device 2 via tee T, for providing steam to reactor 2.Gasification
Stove 5 connects gasification controller 6, for providing steam to gasification controller 6.
Reactor 2 connects tails assay device 10 by escape pipe 9, for providing reaction tail to tails assay device 10
Gas.
Coke reactivity gas controller connects nitrogen feeder 12, carbon dioxide feeder 13, carbon monoxide
Feeder 14 and hydrogen feeder 15.
Such as Fig. 2, gasification furnace 5 includes the distilled water storage device 16 being sequentially connected in series, constant flow pump 17, water inlet pipe 18, adds heat pipe
19 and steam discharge capillary tube 20, steam discharge capillary tube 20 connect gasification controller 6.
As it is shown on figure 3, tails assay device 10 includes tetrafluoro sampling tube the 21, first dehumidifier 22, the sampling being sequentially connected in series
Pump the 23, second dehumidifier 25 and infrared gas analysis meter 24.
Thermal Properties of Coke determinator also includes computer measurement and control device 4, and the control carried out is as follows:
Computer measurement and control device 4 electrically connects distributing instrument 7, for controlling composition and the gas output of coke reactivity gas；Meter
Calculation machine measure and control device 4 electrical connection gasification controller 6, for controlling the gas output of gasification controller 6；Computer measurement and control device 4 electricity
Connect constant flow pump 17, for controlling the output of constant flow pump 17；Computer measurement and control device 4 electrical connection adds heat pipe 19, is used for controlling
Add the heating-up temperature of heat pipe 19；Computer measurement and control device 4 electrically connects electronic weighing device 3, becomes for measuring the weight of reactor 2
Change；Computer measurement and control device 4 electrically connects infrared gas analysis meter 24, is used for detecting tail gas composition.
Thermal Properties of Coke measures
Utilizing said apparatus to be measured, coke sample is that certain steel plant's blast furnace is burnt.
By the sampling method of GB 1997 regulation, take in proportion the coke 20kg of 25mm, discard that bubble is burnt and burner is burnt.Use jaw
Formula crusher in crushing, mixing, division go out 10kg, then use φ 25mm, φ 21mm round-hole mesh to sieve, and the coke button more than φ 25mm breaks again
Broken, screening, takes φ 21mm oversize, removes lamellar burnt burnt with strip, and division obtains coke button 2kg, and (each lkg) is placed in I at twice
In type rotary drum, with the rotating speed of 20r/min, turn 50r, sieve with φ 21mm round-hole mesh again after taking-up, oversize division is gone out 900g
As sample, by quartering, sample being divided into four parts, every part is no less than 220g.The coke of testing coke oven can use 40mm-60mm grain
The coke of level carries out sample preparation.Take respectively and pound into spherical shape not less than 25mm coke.Then sample is put into drying baker, at 180 DEG C
At a temperature of be dried 2h, be cooled to room temperature after taking-up, then sieve with the round-hole mesh of a diameter of 23mm, weigh 200g ± 0.5g
Sample.
Flat sieve plate, 45, sieve plate upper berth high aluminium ball is put into, it is ensured that energy position when coke puts into reactor at reactor bottom
In the flat-temperature zone of stove.
Dried material is weighed 200 ± 0.5g, puts into reactor and recorded the granule number of coke.
System has set parameter, only needs every PV value that monitoring control system shows, SP value, PV-SP value, each stage gas
Body is passed through whether situation meets regulation parameter, and temperature is the most in upward status, as temperature reaches the reaction rank of 1100 DEG C
Its fluctuation range of section should be within ± 5 DEG C.(it is passed through CO2Although after reaction, temperature has larger fluctuation, but should be at 10min
Inside it is maintained at 1100 ± 5 DEG C).
When control temperature rises to 400 DEG C, system can switch to N2(0.8L/min) protection sample, it is necessary to confirm this operation
(furnace temperature must could load sample below 400 DEG C and react), gasifier control system runs, begins to warm up.
Control temperature and rise to 1050 DEG C (850 DEG C or 950 DEG C) left and right, automatically turn on CO2Preheating device, is carried out really it
Recognize.
Control temperature to rise to after 1100 DEG C (1000 DEG C, 900 DEG C) stablize 10 minutes, automatically cut off N2, and switch CO2
(5.0L/min, 4.875L/min, 4.75L/min) and steam (0L/min, 0.125L/min, 0.25L/min), anti-with sample
Answer 2 hours, it is confirmed.
After reaction terminates, intensification will be automatically stopped and be automatically switched off CO2And constant flow pump, and switch N2(3.0L/min) protection, people
Work takes out reactor, and (if arranging automatic tapping mode, reactor will propose outside burner hearth automatically, and be positioned over reactor frame overhead
Sample is gone out after being as cold as less than 100 DEG C.(after reaction terminates, carefully do not scalded by high temperature during artificial taking-up reactor, the most do not roll over
Disconnected thermocouple, gas piping does not wants contact reactor surface).
After reaction experiment terminates, weigh and record coke granule number.
It can be seen that the experiment of coke rich water is truly feasible from above example, the detection of STRENGTH ON COKE reactivity provides
A kind of new approaches.The reactivity of coke can be detected more accurately, carry for understanding coke operation reactive state in blast furnace
For more accurate data-guiding.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all spirit in the present invention and
Within principle, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (10)
1. a Thermal Properties of Coke determinator, including distributing instrument (7), electric furnace (1), the reaction that is arranged in described electric furnace (1)
Device (2), electronic weighing device (3) and tails assay device (10), described electronic weighing device (3) connects described by link
Described reactor (2) is also weighed by reactor (2), and described distributing instrument (7) connects described reactor by air inlet pipe (8)
(2), for providing coke reactivity gas to described reactor (2), described reactor (2) connects described by escape pipe (9)
Tails assay device (10), for providing reaction end gas to described tails assay device (10), it is characterised in that: described distributing instrument
(7) it is also associated with nitrogen feeder (12), carbon dioxide feeder (13), carbon monoxide feeder (14) and hydrogen to supply
Device of air (15).
Thermal Properties of Coke determinator the most according to claim 1, it is characterised in that: described Thermal Properties of Coke determinator
Also including gasify controller (6) and gasification furnace (5), described gasification furnace (5) connects described gasification controller (6), for described
Gasification controller (6) provides steam, and described gasification controller (6) connects described reactor (2), for described reactor
(2) steam is provided.
Thermal Properties of Coke determinator the most according to claim 2, it is characterised in that: described gasification furnace (5) includes successively
Series connection distilled water storage device (16), constant flow pump (17), water inlet pipe (18), add heat pipe (19) and steam discharge capillary tube
(20), described steam discharge capillary tube (20) connects described gasification controller (6).
Thermal Properties of Coke determinator the most according to claim 3, it is characterised in that: described tails assay device (10) is wrapped
Include tetrafluoro sampling tube (21), the first dehumidifier (22), sampling pump (23), the second dehumidifier (25) and the infrared coal gas being sequentially connected in series
Analyser (24).
Thermal Properties of Coke determinator the most according to claim 2, it is characterised in that: the air inlet pipe of described reactor (2)
(8) the described gasification controller (6) of described distributing instrument (7) is connected respectively by tee T.
Thermal Properties of Coke determinator the most according to claim 4, it is characterised in that: described Thermal Properties of Coke determinator
Also include that computer measurement and control device (4), described computer measurement and control device (4) electrically connect described distributing instrument (7), be used for controlling described
The composition of coke reactivity gas and gas output；Described computer measurement and control device (4) electrically connects described gasification controller (6), uses
In the gas output controlling described gasification controller (6)；Described computer measurement and control device (4) electrically connects described constant flow pump (17), uses
In the output controlling described constant flow pump (17)；Add heat pipe (19) described in the electrical connection of described computer measurement and control device (4), be used for controlling
The heating-up temperature of heat pipe (19) is added described in system；Described computer measurement and control device (4) electrically connects described electronic weighing device (3), uses
In the weight change measuring described reactor (2)；Described computer measurement and control device (4) electrically connects described infrared gas analysis meter
(24), it is used for detecting tail gas composition.
7. a Thermal Properties of Coke assay method, it is characterised in that enter with the Thermal Properties of Coke determinator described in claim 6
Row Thermal Properties of Coke measures, and comprises the following steps:
1) by the sampling method of GB GB/T4000-2008, coke specimen is prepared, then by sample the temperature of 175～185 DEG C
Under be dried 1.5～2.5h, be cooled to room temperature after taking-up standby；
2) flat sieve plate is put in reactor (2) bottom, the position when the some high aluminium balls in sieve plate upper berth make coke put into reactor (2)
In the flat-temperature zone of electric furnace (1), dried coke specimen is weighed 200 ± 0.5g, put into reactor (2) and recorded coke
Granule number；
3) controlling electric furnace (1) interior temperature to heat up, when being warming up to 400 DEG C, controlling distributing instrument (7) provides nitrogen to enter to reactor (2)
Row protection, controls gasification furnace (5) operation and heats；
4) control electric furnace (1) interior temperature to heat up, be warming up to less than preset temperature value 45～when 55 DEG C, control distributing instrument (7) to two
Carbonoxide preheats；
5) control electric furnace (1) interior temperature to heat up, be warming up to preset temperature value, temperature stabilization 8～after 12 minutes, control distributing instrument
(7) nitrogen provide at carbon dioxide and steam to reactor (2) is cut off, with specimen reaction 1.5～2.5 hours；
6), after reaction terminates, control distributing instrument (7) and cut off carbon dioxide and provide nitrogen to protect to reactor (2)；Control
Constant flow pump (17) quits work.
Thermal Properties of Coke assay method the most according to claim 7, it is characterised in that: measure be warming up to preset temperature value it
The weight change of rear described reactor (2), carries out the mensuration of Thermal Properties of Coke under constant temperature；Before measurement is warming up to preset temperature value
The arbitrarily weight change of described reactor (2) before and after the temperature range of one end, carries out the mensuration of Thermal Properties of Coke in temperature-rise period.
Thermal Properties of Coke assay method the most according to claim 7, it is characterised in that: described preset temperature value is for being more than
In 900 DEG C and less than or equal to the arbitrary temp value of 1200 DEG C.
Thermal Properties of Coke assay method the most according to claim 7, it is characterised in that step 5) in: carbon dioxide,
Carbonoxide, hydrogen, nitrogen and steam are combined into reacting gas according to any proportioning, and reaction gas flow is for being less than or equal to
The arbitrary value of 5.0L/min.
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