CN206497000U - A kind of device for measuring high temperature metallurgical properties of coke - Google Patents
A kind of device for measuring high temperature metallurgical properties of coke Download PDFInfo
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Abstract
The utility model discloses a kind of device for detecting the metallurgical performance of coke under high temperature, described device includes reactor, electric furnace and tail gas meausring apparatus, and the tail gas meausring apparatus includes gas collector and weighing device；The reactor includes upper lid, pressure sieve plate, pressure-bearing sieve plate, venthole, high aluminium ball, thermocouple and device for exerting；The reactor is sealed by upper lid, the upper lid of the reactor is provided with venthole, the pressure sieve plate is connected with the bottom of device for exerting, cavity places coke between the pressure sieve plate and pressure-bearing sieve plate, the high aluminium ball is arranged between the bottom of pressure-bearing sieve plate and reactor bottom, and air admission hole is arranged at the bottom of the reactor；The electric furnace provides thermal source for reactor, and the gas collector collects the tail gas of reactor discharge, and the weighing device weighs the quality of the tail gas.The utility model can with realistic simulation surroundings, high-temperature high-pressure state and physical environment of the coke in high reaction in furnace, corresponding testing result also can more characterize high temperature metallurgical properties of the coke in blast furnace.
Description
Technical field
The utility model belongs to technical field of ferrous metallurgy, and in particular to a kind of dress of measurement high temperature metallurgical properties of coke
Put.
Background technology
Coke plays an important role in blast fumance, plays reducing agent, exothermic mixture and stock column skeleton.As blast furnace is big
The raising of type and coal powder injection level, the requirement of Coke Quality also more and more higher, current each steel plant increasingly pay attention to coke and existed
Performance under high temperature.Nineteen eighty-three, China has worked out " coke reactivity and post reaction strength test method " national standard, regulation with
Coke at 1100 DEG C with CO2The ability of gas reaction, i.e. reactivity and post reaction strength are metallurgical as coke high-temperature is characterized
The important quality index of energy, and it is in succession widely used for domestic steel plant.But sent out by the research of the worker of smelting iron for a long time
Existing, this two indexs are also not perfect in itself, and it also has some defects：
1) when being that coke participates in reaction in blast furnace, the reaction atmosphere around coke is blast furnace gas, and the standard is inspection
Survey coke at 1100 DEG C with CO2The ability of gas reaction, the standard can not truly simulate atmosphere of the coke in high reaction in furnace；
2) be that, due to the mutual extruding of coke, ore in blast furnace, coke is in the state of HTHP, and the standard for
Coke and CO2Pressure state during gas reaction is not referred to；
3) coke is reacted around blast furnace soft melt zone to cupola well, and reaction temperature is marked between 800~1400 DEG C
There is certain limitation in quasi- regulation, it is impossible to behavior of the true simulation coke in blast furnace using 1100 DEG C of temperature as experiment, should
Standard can not also detect coke reaction speed between 800~1400 DEG C.So often there is following production status at present：It is different
The coke of batch, according to the testing result of the standard, although coke reactivity and post reaction strength are close, but coke is in blast furnace
Using effect difference it is larger.
Patent application CN201210416234 discloses a kind of method for determining high temperature metallurgical properties of coke, the patent application
By the reaction starting temperature of dynamic detection coke and CO2 gases, reaction end of a period actual temperature, reactivity, coke and CO2 are calculated
The response feature value of gas, and Coke Quality evaluated, response feature value is smaller, and coke quality in kind is better, but the party
Method still can not simulate coke can not simulate the state of HTHP of the coke in blast furnace in the atmosphere of high reaction in furnace, side
There is certain defect in method.
Patent application CN201010251139, which is disclosed, tests coke strenth and the method for post reaction strength under hot environment,
This method is pressed downwards after certain distance at the end of coke gasification reaction in high-temperature reactor by the sieve plate that presses sample constant speed of focusing
Stop heating, the burnt sample of cooling, the remaining burnt sample of screening calculates the coke strenth obtained under hot environment.But this method is for simulation
Reacted between 800~1400 DEG C of coke reaction atmosphere during the course of the reaction, the state of HTHP in blast furnace and coke
Speed does not refer to that there is also certain defect for method.
Utility model content
For problem above, the utility model provides a kind of method that can detect the metallurgical performance of coke under high temperature, the party
The physical reactions environment and thermodynamical reaction environment of coke in method analog blast furnace, and detect that coke reacted at 800~1400 DEG C
The curved line relation in coke gasification reaction weight loss and reaction time in journey, chemical reaction of the accurate reaction coke of energy in blast furnace
Journey, and then symbolize the high temperature metallurgical properties of coke.
The utility model provides a kind of device for detecting the metallurgical performance of coke under high temperature, and described device includes reaction
Device, electric furnace and tail gas meausring apparatus；
The tail gas meausring apparatus includes gas collector and weighing device；
The reactor includes upper lid, pressure sieve plate, pressure-bearing sieve plate, venthole, high aluminium ball, thermocouple and device for exerting；
The reactor is sealed by upper lid, and the upper lid of the reactor is provided with venthole, the pressure sieve plate and device for exerting
Bottom is connected, and cavity places coke between the pressure sieve plate and pressure-bearing sieve plate, and the high aluminium ball is arranged at the bottom of pressure-bearing sieve plate
Between portion and reactor bottom, air admission hole is arranged at the bottom of the reactor；
The electric furnace provides thermal source for reactor, and the gas collector collects the tail gas of reactor discharge, the title
The quality for weighing the tail gas is put in refitting.
It is preferred that, described device also includes distribution switch board, and nitrogen, carbon dioxide and blast furnace gas enter through distribution switch board
Enter reactor, the gas of the reactor discharge enters gas collector through distribution switch board.
It is preferred that, the device for exerting includes power set, rotating shaft and spiral sealing device, and the rotating shaft is close by spiral
Seal apparatus is stretched into reactor, and the power set drive shaft is rotated and exerted a force to sieve plate.
The metallurgical performance method of coke comprises the following steps under the detection high temperature that the utility model is provided：
1) coke specimen is prepared；
2) coke specimen is put into drying box, 2h is dried at a temperature of 170~180 DEG C, rear take out is cooled to room temperature；
3) coke specimen of room temperature is will be cooled to loaded between pressure-bearing sieve plate and pressure sieve plate, it is using upper lid that reactor is close
Envelope, after reactor is suspended in stove, and coke in reactor is in electric furnace flat-temperature zone；
4) when heating heating coke is to its central temperature up to 300 DEG C, nitrogen, protection are led to 0.7~0.9L/min flow
Coke, prevents its scaling loss；
5) when continuation heating coke to its central temperature reaches 750~900 DEG C, nitrogen is cut off, flow is passed through for 2~4L/
Min carbon dioxide and flow is 5~10L/min blast furnace gas, reacts 3~3.5h, and it is 3 during which to control furnace temperature programming rate
± 0.5 DEG C/min and reaction the moment furnace temperature that ends are 1290~1440 DEG C, during which control in reactor gas pressure intensity for 0.27~
0.36Mpa, and can be pressed by the sieve plate that presses with STRENGTH ON COKE, and the pressure applied is at the uniform velocity increased over time, reaction
STRENGTH ON COKE applies the power that pressure is 0.05Mpa during beginning, and STRENGTH ON COKE applies the power that pressure is 0.5Mpa at the end of reaction, during which adopts
Pressurizeed with the method gradient of dynamic auto control, and collect exit gas, and working off one's feeling vent one's spleen of recording that the differential responses time is collected into
Weight；
6) after reaction terminates, stop heating, cut off carbon dioxide, the nitrogen that flow is 2~3L/min is passed through, until coke
Temperature is down to room temperature, stops logical nitrogen；
7) weight loss and the function in reaction time and coke strenth CHS of coke are calculated,
The weight loss of the coke subtracts the quality of inlet gas for the quality of exit gas；
The coke strenth CHS is the remaining burnt sample of screening, and screening chooses 10mm and measures its quality m1 with part of the body cavity above the diaphragm housing the heart and lungs sample, and by public affairs
Formula CHS=m1/m × 100 calculate coke strenth CHS, and wherein m is the gross mass of coke in reactor when reaction starts.
It is preferred that, the sampling method as defined in the standards of GB/T 1997 prepares coke, and detailed process can be as follows：Take coke
20kg, is sieved with φ 25mm round-hole meshes, is sieved more than φ 25mm coke buttons with after jaw crushing crusher machine, until overall coke size
Respectively less than φ 25mm, graininess coke button is trimmed to by, strip Jiao burnt compared with slab-like by hand.After being sieved with φ 23mm round-hole meshes,
Take oversize mixing, division to obtain coke button 2kg, (each 1kg) is placed in I type rotary drum in two times, with 20r/min rotating speed, turn
50r, is sieved with φ 2mm round-hole meshes, oversize division is gone out to 900g as sample, sample is divided into four with quartering again after taking-up
Part, every part is no less than 220g
It is preferred that, the coke after cooling screens out surface powder using φ 23mm round-hole meshes.
The chemical reaction equation of coke is in reactor in the utility model：
C+CO2↑=2CO ↑
According to this chemical reaction equation, the quality that the quality of exit gas subtracts inlet gas is the weight loss of coke,
The weight loss and the function in reaction time of coke are calculated using this method.
The high aluminium ball is a classification of alumina balls, because its alumina content is higher and is called high aluminium ball for short.
High aluminium ball can be subdivided into the series such as 90,92,95,99 according to alumina content again, and those skilled in the art can be according to making spirit
Selection living, it has no effect on the result finally obtained.
The utility model can with realistic simulation surroundings, high-temperature high-pressure state and thing of the coke in high reaction in furnace
Environment is managed, corresponding testing result also can more characterize high temperature metallurgical properties of the coke in blast furnace；Method energy of the present utility model
The weightless weight and reaction time, the relation of reaction temperature of coke are detected, the reaction rate curve of coke can be calculated；This reality
Equipment with new needs is simple, it is only necessary to which the coke metallurgical performance detection device general to current metallurgy industry does a little transformation just
It can be achieved.
Brief description of the drawings
Fig. 1 is the utility model test device schematic diagram；
Wherein 1 it is nitrogen cylinder, 2 is CO2Gas cylinder, 3 be blast furnace gas gas cylinder, 4 be distribution switch board, 5 be temperature control cabinet,
6 it is computer measurement and control device, 7 be switch board, 8 be power set, 9 be pressure rotating shaft, 10 be thermocouple, 11 be venthole, 12 is
Electric furnace, 13 be press sieve plate, 14 be coke, 15 be carry the sieve plate of coke, 16 be high aluminium ball, 17 be air admission hole, 18 be collection
The device of exit gas, 19 be electronic balance, 20 be reactor, 21 be upper lid；
Fig. 2 is the close-up schematic view on reactor top；
Fig. 3 is pressure sieve plate top view in reactor；
Fig. 4 is the weight loss and the function figure in reaction time of the coke of embodiment 1.
Fig. 5 is the weight loss and the function figure in reaction time of the coke of embodiment 2.
Embodiment
Embodiment of the present utility model is the following is, it is used only as illustrating rather than limitation to of the present utility model.
Fig. 1-3 are referred to, the utility model provides a kind of device for detecting the metallurgical performance of coke under high temperature, the dress
Put including reactor, electric furnace and tail gas meausring apparatus；
The tail gas meausring apparatus includes gas collector and weighing device；
The reactor includes upper lid 21, pressure sieve plate 13, pressure-bearing sieve plate 15, venthole 11, high aluminium ball 16, thermocouple 10
And device for exerting；The reactor 20 is sealed by upper lid 21, and venthole 11, the pressure sieve plate are provided with the upper lid 21
13 are connected with the bottom of device for exerting, and cavity places coke 14, the high alumina between the pressure sieve plate 13 and pressure-bearing sieve plate 15
Ball 16 is arranged between the bottom of pressure-bearing sieve plate 15 and reactor bottom, and the air admission hole 17 is arranged at the bottom of the reactor
Portion；
The electric furnace 12 is that reactor 20 provides thermal source.
Optionally, it is described detection high temperature under coke metallurgical performance device also include distribution switch board 4, nitrogen cylinder 1,
CO2Gas cylinder 2, the nitrogen in blast furnace gas gas cylinder 3, carbon dioxide and blast furnace gas enter reactor 20, institute through distribution switch board 4
The gas for stating the discharge of reactor 20 enters gas collector through distribution switch board 4.
Optionally, the device for exerting includes power set 8, pressure rotating shaft 9 and thread sealing device 91, and the pressure turns
Axle 9 is stretched into reactor by thread sealing device 91 and pressure sieve plate is contacted in the stress point 92 that rotating shaft presses to sieve plate, institute
Power set drive shaft is stated to rotate and exert a force to pressure sieve plate 13.
Optionally, the device of the metallurgical performance of coke also includes temperature control cabinet 5, computer measurement and control under the detection high temperature
Cabinet 6, switch board 7.
Do not refer to the technological means that part can have been recorded using prior art above, be such as used for from electronic balance
Meter gaseous.The preparation method of coke can select conventional coke in following methods, and not necessarily be used from embodiment
Method prepare coke.
Below in conjunction with the accompanying drawings and specific embodiment is described further to the metallurgical performance of coke under detection high temperature
Embodiment 1：
A. the sampling method as defined in the standards of GB/T 1997, takes coke 20kg, is sieved with φ 25mm round-hole meshes, more than φ
25mm coke buttons are sieved with after jaw crushing crusher machine, until overall coke size is respectively less than φ 25mm, will be compared with slab-like Jiao, strip
Jiao is trimmed to graininess coke button by hand.After being sieved with φ 23mm round-hole meshes, take oversize mixing, division to obtain coke button 2kg, be divided to two
Secondary (each 1kg) is placed in I type rotary drum, with 20r/min rotating speed, turns 50r, is sieved again with φ 2mm round-hole meshes after taking-up, will
Oversize division goes out 900g as sample, sample is divided into four parts with quartering, every part standby no less than 220g.
B. the sample made is put into drying box, 2h is dried at a temperature of 170 DEG C, taken out coke and be cooled to room temperature, weigh
200g ± 0.5g is stand-by；
C. with air inlet pipe and blast pipe on reactor, the reactor bottom of its built-in thermocouple spreads a layer thickness for l00mm
Sieve plate is kept flat on high aluminium ball, high aluminium ball, 200g ± 0.5g coke specimens that step B is got ready fix upper lid loaded on sieve plate
On reactor；Reactor is suspended in stove, and the coke in reactor is in electric furnace flat-temperature zone；
D., pressure sieve plate is set above burnt sample, and pressure sieve plate is connected with the power transmission outside reactor, pressure sieve
Plate is thread seal with the sealing means covered on reactor, and pressure sieve plate can be pressed with STRENGTH ON COKE, and power source is outside reactor
Power transmission, can be pressed by the rotation for the rotating shaft that presses to sieve plate.
When E, heating heating coke is to its central temperature up to 300 DEG C, nitrogen is led to 0.8L/min flow, coke is protected,
Prevent its scaling loss；
F. when continuation heating coke to its central temperature reaches 750 DEG C, nitrogen is cut off, it is the two of 2L/min to be passed through flow
Carbonoxide and the blast furnace gas that flow is 15L/min, react 3h, and during which furnace temperature programming rate is 3 DEG C/min, when reaction ends
It is 1290 DEG C to carve furnace temperature, and it is 0.35Mpa during which to control gas pressure intensity control in reactor, and is applied by the sieve plate STRENGTH ON COKE that presses
Pressure, and the pressure applied is at the uniform velocity increased over time, and STRENGTH ON COKE applies the power that pressure is 0.05Mpa when reaction starts,
STRENGTH ON COKE applies the power that pressure is 0.5Mpa at the end of reaction, during which adds him using the method gradient of dynamic auto control, and receive
Collect exit gas, and the exit gas quality and the relation in reaction time that are collected into are recorded by computer measurement and control device, work off one's feeling vent one's spleen
The quality that the quality of body subtracts inlet gas is the weight loss of coke.
G. after reaction 3h, stop heating, cut off carbon dioxide, the nitrogen that flow is 2L/min is passed through, until coke temperature
Room temperature is down to, stops logical nitrogen；
H, the weight loss of calculating coke and the function in reaction time are shown in Fig. 4.
I, the remaining burnt sample of screening, screening choose 10mm and measure its quality m1 with part of the body cavity above the diaphragm housing the heart and lungs sample, and calculating is obtained under hot environment
Coke strenth CHS is：
CHS (%)=m1/m × 100
Wherein m is the gross mass of coke in reactor when reaction starts, and CHS is 43.3 after testing.
Embodiment 2：
A. the sampling method as defined in the standards of GB/T 1997, takes coke 20kg, is sieved with φ 25mm round-hole meshes, more than φ
25mm coke buttons are sieved with after jaw crushing crusher machine, until overall coke size is respectively less than φ 25mm, will be compared with slab-like Jiao, strip
Jiao is trimmed to graininess coke button by hand.After being sieved with φ 23mm round-hole meshes, take oversize mixing, division to obtain coke button 2kg, be divided to two
Secondary (each 1kg) is placed in I type rotary drum, with 20r/min rotating speed, turns 50r, is sieved again with φ 2mm round-hole meshes after taking-up, will
Oversize division goes out 900g as sample, sample is divided into four parts with quartering, every part standby no less than 220g.
B. the sample made is put into drying box, 2h is dried at a temperature of 170 DEG C, taken out coke and be cooled to room temperature, weigh
200g ± 0.5g is stand-by；
C. with air inlet pipe and blast pipe on reactor, the reactor bottom of its built-in thermocouple spreads a layer thickness for l00mm
High aluminium ball, keep flat sieve plate on high aluminium ball, 200g ± 0.5g coke specimens that step B is got ready are solid by upper lid loaded on sieve plate
It is scheduled on reactor；Reactor is suspended in stove, and the coke in reactor is in electric furnace flat-temperature zone；
D., pressure sieve plate is set above burnt sample, and pressure sieve plate is connected with the power transmission outside reactor, pressure sieve
Plate is thread seal with the sealing means covered on reactor, and pressure sieve plate can be pressed with STRENGTH ON COKE, and power source is outside reactor
Power transmission, can be pressed by the rotation for the rotating shaft that presses to sieve plate.
When E, heating heating coke is to its central temperature up to 300 DEG C, nitrogen is led to 0.8L/min flow, coke is protected,
Prevent its scaling loss；
F. when continuation heating coke to its central temperature reaches 900 DEG C, nitrogen is cut off, it is the two of 4L/min to be passed through flow
Carbonoxide and the blast furnace gas that flow is 5L/min, react 3h, and during which furnace temperature programming rate is 3 DEG C/min, and reaction ends the moment
Furnace temperature is 1440 DEG C, and it is 0.3Mpa during which to control gas pressure intensity control in reactor, and is pressed by the sieve plate STRENGTH ON COKE that presses, and
And the pressure applied is at the uniform velocity increased over time, STRENGTH ON COKE applies the power that pressure is 0.05Mpa, reaction knot when reaction starts
STRENGTH ON COKE applies the power that pressure is 0.5Mpa during beam, is during which pressurizeed using the method gradient of dynamic auto control, and collect outlet
Gas, and the exit gas quality and the relation in reaction time that are collected into, the matter of exit gas are recorded by computer measurement and control device
The quality that amount subtracts inlet gas is the weight loss of coke.
G. after reaction 3h, stop heating, cut off carbon dioxide, the nitrogen that flow is 2L/min is passed through, until coke temperature
Room temperature is down to, stops logical nitrogen；
H, the weight loss of calculating coke and the function in reaction time are shown in Fig. 5.
I, the remaining burnt sample of screening, screening choose 10mm and measure its quality m1 with part of the body cavity above the diaphragm housing the heart and lungs sample, and calculating is obtained under hot environment
Coke strenth CHS is：
CHS (%)=m1/m × 100
Wherein m is the gross mass of coke in reactor when reaction starts, and CHS is 35.4 after testing.
Claims (3)
1. a kind of device for detecting the metallurgical performance of coke under high temperature, described device includes reactor, electric furnace and tail gas and weighs dress
Put, it is characterised in that：
The tail gas meausring apparatus includes gas collector and weighing device；
The reactor includes upper lid, pressure sieve plate, pressure-bearing sieve plate, venthole, high aluminium ball, thermocouple and device for exerting；It is described
Reactor is sealed by upper lid, and the upper lid of the reactor is provided with venthole, the bottom of the pressure sieve plate and device for exerting
Be connected, it is described pressure sieve plate and pressure-bearing sieve plate between cavity place coke, the high aluminium ball be arranged at pressure-bearing sieve plate bottom and
Between reactor bottom, air admission hole is arranged at the bottom of the reactor；
The electric furnace provides thermal source for reactor, and the gas collector collects the tail gas of reactor discharge, the dress of weighing
Put the quality for weighing the tail gas.
2. the device of the metallurgical performance of coke under detection high temperature according to claim 1, it is characterised in that described device is also
Including distribution switch board, nitrogen, carbon dioxide and blast furnace gas enter reactor through distribution switch board, the reactor discharge
Gas enters gas collector through distribution switch board.
3. the device of the metallurgical performance of coke under detection high temperature according to claim 1 or 2, it is characterised in that described to apply
Pressure device includes power set, rotating shaft and spiral sealing device, and the rotating shaft is stretched into reactor by spiral sealing device, institute
Power set drive shaft is stated to rotate and exert a force to sieve plate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621208974.XU CN206497000U (en) | 2016-11-09 | 2016-11-09 | A kind of device for measuring high temperature metallurgical properties of coke |
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| CN201621208974.XU CN206497000U (en) | 2016-11-09 | 2016-11-09 | A kind of device for measuring high temperature metallurgical properties of coke |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106680135A (en) * | 2016-11-09 | 2017-05-17 | 山东钢铁股份有限公司 | Apparatus and method for measuring high-temperature metallurgical performance of coke |
| CN110411852A (en) * | 2019-07-30 | 2019-11-05 | 重庆大学 | The measuring method of coke property alternation in a kind of blast furnace |
-
2016
- 2016-11-09 CN CN201621208974.XU patent/CN206497000U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106680135A (en) * | 2016-11-09 | 2017-05-17 | 山东钢铁股份有限公司 | Apparatus and method for measuring high-temperature metallurgical performance of coke |
| CN106680135B (en) * | 2016-11-09 | 2023-08-08 | 山东钢铁股份有限公司 | Device and method for measuring high-temperature metallurgical property of coke |
| CN110411852A (en) * | 2019-07-30 | 2019-11-05 | 重庆大学 | The measuring method of coke property alternation in a kind of blast furnace |
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