CN102374955A - Method for measuring coke strength and strength after reaction in high temperature environment - Google Patents
Method for measuring coke strength and strength after reaction in high temperature environment Download PDFInfo
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Abstract
The invention especially relates to a method for measuring coke strength and strength after a reaction in high temperature environment, which belongs to the field measuring of coke performance. The method for measuring coke strength in high temperature environment comprises the following steps: selecting coke samples to be measured, configuring measuring equipment, starting an electric furnace to heat the coke samples, stopping heating after a pressurizing sieve plate pressurizes the coke samples downwards at a constant speed and moves for a certain distance, cooling the coke samples, screening residual coke samples and calculating coke strength in high temperature environment. The method for measuring coke strength after a reaction in high temperature environment comprises the following steps: selecting coke samples to be measured, configuring measuring equipment, starting an electric furnace to heat the coke samples, allowing CO2 to enter for reaction with the coke samples, measuring the mass of left coke samples after the reaction, stopping heating after a pressurizing sieve plate pressurizes the coke samples downwards at a constant speed and moves for a certain distance, cooling the coke sample, screening residual coke samples and calculating coke strength after the reaction in high temperature environment. According to the invention, mechanical strength of coke is directly measured in high temperature environment, providing a more reasonable evaluation way for evaluation of the quality of coke.
Description
Technical field
The invention belongs to the coke property field tests, particularly relate to the method for testing of a kind of coke strenth and post-reaction strength.
Background technology
Domestic at present and international intensity evaluation for smelter coke mainly comprises physical strength (cold strength) and hot strength two aspects.The physical strength of lump coke refers to the dropping strength and the barrate strength of coke; Different countries has formulated different standards; But principle is identical; All be that the percentage that sieves out some grade is then recently investigated the physical strength of coke through collision, friction between test coke and iron case or the rotary drum, between coke and the coke.The 1830mm height that all adopts in the world about dropping strength falls for 4 times; Rotary drum mainly contains Micoud nurse, JIS (Nippon Standard), ASTM (Unite States Standard (USS)) rotary drum.Hot strength is meant intensity or the intensity through at room temperature recording after the pyroprocessing that coke is at high temperature measured.What use always in the industry is the high temperature barrate strength; Be divided into two types of electric heating and coal gas heating by thermal source; And be divided into internal heat type and external-heat, and at present the employing with silit is the drum material more, the electricity consumption heating-up temperature can reach 1500 ℃ internal heat type; Hot drum test can reflect the heat damage of coke, compares more near situation in the blast furnace with the normal temperature drum test.In hot rotary drum, feed CO simultaneously
2The time, then can record hot strength and CO simultaneously
2Post-reaction strength.The reactive method of testing of coke is divided into lump coke reactive and two kinds of grain reactivity of coke; Block coke carries out under the analog blast furnace condition in the reactor of certain size; According to the sample granule size that do not coexist of research purpose, have nothing in common with each other in aspects such as sample quantities, temperature of reaction, reaction gas composition and index mode.
Measure the reactivity of lump coke and the method such as the GB (GB/T4000-1996) of intensity in the prior art, at first coke is processed the piece of 19-21mm, contract and get 200g; Then under 1100 ℃, with the 100%CO of 5L/min
2, react that the detection reaction weight-loss ratio is reactive CRI after 2 hours; (φ 130mm * L700mm) changeing 600 changes (20rpm * 30min), sieve at I type rotary drum with reacted coke cooling back more at last; Calculate the number percent that accounts on the 10mm sieve into the drum amount at last and be post-reaction strength CSR.
Because the used burnt appearance amount of lump coke reactive is more, plant bulk is bigger, and the reaction time is longer; For ease of experimental study; Also often select burnt evaluation response property of grain and intensity less than 6mm in the prior art for use, China has formulated GB (GB220-77), at first gets the burnt appearance amount of granularity 4-6mm 15g; Then at 1100 ℃ of 100%CO that feed 5L/min down
2, the detection reaction weight-loss ratio is reactive CRI behind the reaction 60min; To react the back coke at last again and sieve the 5min that shakes with φ 200 standard vibrations, the percent that accounts for into the sieve sample greater than the 3mm coke that measures is post-reaction strength index CSR.
The skeleton function of coke in blast furnace is extremely important, and if the coke quality difference in blast furnace efflorescence have a strong impact on the blast furnace aeration.In blast furnace on the lump zone temperature reach coke after 900 ℃ begin with coal gas in CO
2Take place to dissolve and decrease reaction, and in the process that descends, receive the extruding between the coke simultaneously, reinforced percussive action, these are the key factors that cause its efflorescence.Can simulate the coke mode that this procedural strength changes in blast furnace at present coke reactivity and post-reaction strength test method are arranged; But these methods are coolings earlier behind coke and carbon dioxide reaction; Then through its physical strength of I type rotary drum test; This method is not implemented under the condition of high temperature and tests coke strenth, can't the Strength Changes of real simulation reaction back coke in blast furnace.
Summary of the invention
Technical matters to be solved by this invention provides a kind of method of under hot environment, testing coke strenth; This method can real simulation blast furnace in coke suffered molten damage and physical disturbance effect under hot environment, for the quality assessment of coke provides a kind of more rational evaluation mode.
The present invention is achieved in that the method for test coke strenth under a kind of hot environment, may further comprise the steps,
Step 1, choose the burnt appearance of experiment, burnt appearance is divided into the lump coke of 10-25mm and burnt less than the grain of 10mm according to grade, and the quality of choosing burnt appearance is m;
Step 2, configure electric furnace and reacting furnace, one deck high aluminium ball in shop, reacting furnace bottom highly is taped against in the electric furnace flat-temperature zone, on blast furnace ball layer, fixed screen deck is set, and burnt appearance is placed on the fixed screen deck, above burnt appearance, the sieve plate of exerting pressure is set;
Step 3, open the heating of electric furnace focusing appearance, 8-16 ℃/min of electric furnace programming rate, logical nitrogen protection after a burnt appearance temperature reaches 400 ℃, nitrogen feeding amount is 0.5-1L/min, keeps constant temperature 30-120min after making burnt appearance be warming up to 1000-1250 ℃;
Step 4, exerting pressure downwards through the sieve plate focusing appearance constant speed of exerting pressure stops the burnt appearance of heating cooling behind the certain distance, and the speed of exerting pressure is 1cm/min, and the distance of exerting pressure is 1-5cm;
Step 5, the burnt appearance of screening residue, when burnt appearance during for lump coke screening choose 9.5mm with its quality of part of the body cavity above the diaphragm housing the heart and lungs appearance measurement m
1, screening is chosen 3mm and is measured its quality m with part of the body cavity above the diaphragm housing the heart and lungs appearance when burnt appearance is grain Jiao
1
The coke strenth CHS that calculates under the hot environment is:
CHS（%）=m
1/m×100 (1)。
Said when choosing burnt appearance the choosing method of lump coke following, get coke at first in proportion greater than 25mm, it is burnt with to protect head burnt with a formula crusher in crushing, mixing, division to discard bubble; With 25mm and the screening of 21mm round-hole mesh, the 21mm screen overflow is got in, screening broken again greater than the coke button of 25mm again, removes the burnt and burnt division of strip of sheet; Place rotary drum more at twice,, change 50r with the rotating speed of 20r/min; Again with the screening of 21mm round-hole mesh, choose the 200g screen overflow after the taking-up as burnt appearance at every turn.
Said when choosing burnt appearance the burnt choosing method of grain following, get coke at first in proportion greater than 10mm, it is burnt with to protect head burnt with a formula crusher in crushing, mixing, division to discard bubble; With 10mm and the screening of 6mm round-hole mesh, the 6mm screen overflow is got in, screening broken again greater than the coke button of 10mm again, removes the burnt and burnt division of strip of sheet; Place rotary drum more at twice,, change 50r with the rotating speed of 20r/min; Again with the screening of 6mm round-hole mesh, choose the 200g screen overflow after the taking-up as burnt appearance at every turn.
The method of test post reaction strength of coke may further comprise the steps under a kind of hot environment,
Step 1, choose the burnt appearance of experiment, burnt appearance is divided into the lump coke of 10-25mm and burnt less than the grain of 10mm according to grade, and the quality of choosing burnt appearance is m;
Step 2, configure electric furnace and reacting furnace, one deck high aluminium ball in shop, reacting furnace bottom highly is taped against in the electric furnace flat-temperature zone, on blast furnace ball layer, fixed screen deck is set, and burnt appearance is placed on the fixed screen deck, above burnt appearance, the sieve plate of exerting pressure is set;
Step 3, open the heating of electric furnace focusing appearance, 8-16 ℃/min of electric furnace programming rate, logical nitrogen protection after a burnt appearance temperature reaches 400 ℃, nitrogen feeding amount is 0.5-1L/min, keeps constant temperature and feeds CO after making burnt appearance be warming up to 1000-1250 ℃
2Reaction 30-120min, CO
2The feeding amount is 5L/min, closes CO after reaction finishes
2
Step 4, burnt kind of quality m of measurement reaction back residue
0, exerting pressure downwards through the sieve plate focusing appearance constant speed of exerting pressure then stops the burnt appearance of heating cooling behind the certain distance, and the speed of exerting pressure is 1cm/min, and the distance of exerting pressure is 1-5cm;
Step 5, the burnt appearance of screening residue, when burnt appearance during for lump coke screening choose 9.5mm with its quality of part of the body cavity above the diaphragm housing the heart and lungs appearance measurement m
1, screening is chosen 3mm and is measured its quality m with part of the body cavity above the diaphragm housing the heart and lungs appearance when burnt appearance is grain Jiao
1
The post reaction strength of coke CHSR that calculates under the hot environment is:
CHSR(%)=m
1/m
0?×100 (2)
Said when choosing burnt appearance the choosing method of lump coke following, get coke at first in proportion greater than 25mm, it is burnt with to protect head burnt with a formula crusher in crushing, mixing, division to discard bubble; With 25mm and the screening of 21mm round-hole mesh, the 21mm screen overflow is got in, screening broken again greater than the coke button of 25mm again, removes the burnt and burnt division of strip of sheet; Place rotary drum more at twice,, change 50r with the rotating speed of 20r/min; Again with the screening of 21mm round-hole mesh, choose the 200g screen overflow after the taking-up as burnt appearance at every turn.
Said when choosing burnt appearance the burnt choosing method of grain following, get coke at first in proportion greater than 10mm, it is burnt with to protect head burnt with a formula crusher in crushing, mixing, division to discard bubble; With 10mm and the screening of 6mm round-hole mesh, the 6mm screen overflow is got in, screening broken again greater than the coke button of 10mm again, removes the burnt and burnt division of strip of sheet; Place rotary drum more at twice,, change 50r with the rotating speed of 20r/min; Again with the screening of 6mm round-hole mesh, choose the 200g screen overflow after the taking-up as burnt appearance at every turn.
The method of test coke strenth and post-reaction strength is the physical strength of under hot environment, directly testing coke under the hot environment of the present invention; So the degree of specifically being damaged and the chalking resistance of coke can on interior lump zone of real simulated blast furnace and the soft melt zone more; For the quality of coke provides a kind of new detection method; And a kind of notion of brand-new test hot strength of coke has been proposed; For the quality assessment of coke provides a kind of more rational evaluation mode, the utilization factor that not only can the improve coke raw material that avoids waste, and can a kind of new guide parameters be provided for coal-blending coking work.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in the restriction scope of the present invention.Should be understood that in addition those skilled in the art can do various changes or modification to the present invention after the content of having read the present invention's statement, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Embodiment 1
The burnt appearance of in the present invention test comprises that grade is the lump coke of 10-25mm and less than burnt two kinds of the grain of 10mm.Said when choosing burnt appearance the choosing method of lump coke following, get coke at first in proportion greater than 25mm, it is burnt with to protect head burnt with a formula crusher in crushing, mixing, division to discard bubble; With 25mm and the screening of 21mm round-hole mesh, the 21mm screen overflow is got in, screening broken again greater than the coke button of 25mm again, removes the burnt and burnt division of strip of sheet; Place rotary drum more at twice,, change 50r with the rotating speed of 20r/min; Again with the screening of 21mm round-hole mesh, choose the 200g screen overflow after the taking-up as burnt appearance at every turn.Said when choosing burnt appearance the burnt choosing method of grain following, get coke at first in proportion greater than 10mm, it is burnt with to protect head burnt with a formula crusher in crushing, mixing, division to discard bubble; With 10mm and the screening of 6mm round-hole mesh, the 6mm screen overflow is got in, screening broken again greater than the coke button of 10mm again, removes the burnt and burnt division of strip of sheet; Place rotary drum more at twice,, change 50r with the rotating speed of 20r/min; Again with the screening of 6mm round-hole mesh, choose the 200g screen overflow after the taking-up as burnt appearance at every turn.
The method of test post reaction strength of coke under a kind of hot environment,
Step 1, choose the burnt appearance of the lump coke 200g that the 200g granularity is the 10-25mm regular shape;
Step 2, configure electric furnace and reacting furnace; One deck high aluminium ball in shop, reacting furnace bottom; Highly be taped against in the electric furnace flat-temperature zone; On blast furnace ball layer, fixed screen deck is set; Burnt appearance is placed on the fixed screen deck, above burnt appearance, the sieve plate of exerting pressure is set, and the reactor loam cake is an one with exert pressure sieve plate and thermocouple; Thermocouple sheath inserts burnt appearance center, adjusts the sieve plate position of exerting pressure it just in time is covered on the burnt appearance;
Step 3, open the heating of electric furnace focusing appearance, 10 ℃/min of electric furnace programming rate, logical nitrogen protection after a burnt appearance temperature reaches 400 ℃, nitrogen feeding amount is 0.8L/min, keeps constant temperature after making burnt appearance be warming up to 1000 ℃,
The feeding flow is 5L/minCO
2Reaction 2h turns off CO then
2Gas continues to feed 0.8L/min nitrogen protection coke again;
Step 4, to measure the burnt appearance of a reaction back residue quality be 142g, and exerting pressure downwards through the sieve plate focusing appearance constant speed of exerting pressure stops the burnt appearance of heating cooling behind the certain distance, and the speed of exerting pressure is 1cm/min, and the distance of exerting pressure is 1cm;
In this step; The place decision that the distance of exerting pressure is used according to coke, for the coke that is applied to 1000 cubic metres of blast furnaces, the distance of exerting pressure is 1cm; The coke of 2500 cubic metres of blast furnaces is exerted pressure apart from being 3cm, and the coke of big blast furnace is exerted pressure apart from being 5cm more than 4000 cubic metres.
Step 5, the burnt appearance of screening residue, recording the above coke quality of 9.5mm grade is 108g, calculating the number percent that accounts for the burnt appearance of reaction back residue quality is that coke post-reaction strength CHSR at high temperature is 76.
Embodiment 2
The method of test post reaction strength of coke under a kind of hot environment,
Step 1, choose the burnt appearance of the lump coke 200g that the 200g granularity is the 10-25mm regular shape;
Step 2, configure electric furnace and reacting furnace; One deck high aluminium ball in shop, reacting furnace bottom; Highly be taped against in the electric furnace flat-temperature zone; On blast furnace ball layer, fixed screen deck is set; Burnt appearance is placed on the fixed screen deck, above burnt appearance, the sieve plate of exerting pressure is set, and the reactor loam cake is an one with exert pressure sieve plate and thermocouple; Thermocouple sheath inserts burnt appearance center, adjusts the sieve plate position of exerting pressure it just in time is covered on the burnt appearance;
Step 3, open the heating of electric furnace focusing appearance, 8 ℃/min of electric furnace programming rate, logical nitrogen protection after a burnt appearance temperature reaches 400 ℃, nitrogen feeding amount is 0.5L/min, keeps constant temperature after making burnt appearance be warming up to 1100 ℃,
The feeding flow is 5L/minCO
2Reaction 90min turns off CO then
2Gas continues to feed 0.5L/min nitrogen protection coke again;
Step 4, to measure the burnt appearance of a reaction back residue quality be 138g, and exerting pressure downwards through the sieve plate focusing appearance constant speed of exerting pressure stops the burnt appearance of heating cooling behind the certain distance, and the speed of exerting pressure is 1cm/min, and the distance of exerting pressure is 3cm;
Step 5, the burnt appearance of screening residue, recording the above coke quality of 9.5mm grade is 87g, calculating the number percent that accounts for the burnt appearance of reaction back residue quality is that coke post-reaction strength CHSR at high temperature is 63.
Embodiment 3
The method of test post reaction strength of coke under a kind of hot environment,
Step 1, choose the burnt appearance of the lump coke 200g that the 200g granularity is the 10-25mm regular shape;
Step 2, configure electric furnace and reacting furnace; One deck high aluminium ball in shop, reacting furnace bottom; Highly be taped against in the electric furnace flat-temperature zone; On blast furnace ball layer, fixed screen deck is set; Burnt appearance is placed on the fixed screen deck, above burnt appearance, the sieve plate of exerting pressure is set, and the reactor loam cake is an one with exert pressure sieve plate and thermocouple; Thermocouple sheath inserts burnt appearance center, adjusts the sieve plate position of exerting pressure it just in time is covered on the burnt appearance;
Step 3, open the heating of electric furnace focusing appearance, 16 ℃/min of electric furnace programming rate, logical nitrogen protection after a burnt appearance temperature reaches 400 ℃, nitrogen feeding amount is 1L/min, keeps constant temperature after making burnt appearance be warming up to 1250 ℃,
The feeding flow is 5L/minCO
2Reaction 2h turns off CO then
2Gas continues to feed 1L/min nitrogen protection coke again;
Step 4, to measure the burnt appearance of a reaction back residue quality be 126g, and exerting pressure downwards through the sieve plate focusing appearance constant speed of exerting pressure stops the burnt appearance of heating cooling behind the certain distance, and the speed of exerting pressure is 1cm/min, and the distance of exerting pressure is 5cm;
Step 5, the burnt appearance of screening residue, recording the above coke quality of 9.5mm grade is 55g, calculating the number percent that accounts for the burnt appearance of reaction back residue quality is that coke post-reaction strength CHSR at high temperature is 44.
In the present embodiment; It is 29 that this Jiao's appearance is utilized the detected reactivity of traditional thermal property of coke evaluation method, and post-reaction strength is 53, is defective coke; But the result who uses this method embodiment shows that this coke can be applied to 2500 cubic metres and following coke oven; Be qualified coke, production application shows that this methods and results is reasonably, has avoided unnecessary waste.
Embodiment 4
The method of test post reaction strength of coke under a kind of hot environment,
Step 1, choose the burnt appearance of the lump coke 200g that the 200g granularity is the 10-25mm regular shape;
Step 2, configure electric furnace and reacting furnace; One deck high aluminium ball in shop, reacting furnace bottom; Highly be taped against in the electric furnace flat-temperature zone; On blast furnace ball layer, fixed screen deck is set; Burnt appearance is placed on the fixed screen deck, above burnt appearance, the sieve plate of exerting pressure is set, and the reactor loam cake is an one with exert pressure sieve plate and thermocouple; Thermocouple sheath inserts burnt appearance center, adjusts the sieve plate position of exerting pressure it just in time is covered on the burnt appearance;
Step 3, open the heating of electric furnace focusing appearance, 10 ℃/min of electric furnace programming rate, logical nitrogen protection after a burnt appearance temperature reaches 400 ℃, nitrogen feeding amount is 1L/min, keeps constant temperature after making burnt appearance be warming up to 1250 ℃,
The feeding flow is 5L/minCO
2Reaction 30min turns off CO then
2Gas continues to feed 1L/min nitrogen protection coke again;
Step 4, to measure the burnt appearance of a reaction back residue quality be 176g, and exerting pressure downwards through the sieve plate focusing appearance constant speed of exerting pressure stops the burnt appearance of heating cooling behind the certain distance, and the speed of exerting pressure is 1cm/min, and the distance of exerting pressure is 1cm;
Step 5, the burnt appearance of screening residue, recording the above coke quality of 9.5mm grade is 155g, calculating the number percent that accounts for the burnt appearance of reaction back residue quality is that coke post-reaction strength CHSR at high temperature is 88.
Embodiment 5
The method of test coke strenth under a kind of hot environment,
Step 1, choose the burnt appearance of the lump coke 200g that the 200g granularity is the 10-25mm regular shape;
Step 2, configure electric furnace and reacting furnace; One deck high aluminium ball in shop, reacting furnace bottom; Highly be taped against in the electric furnace flat-temperature zone; On blast furnace ball layer, fixed screen deck is set; Burnt appearance is placed on the fixed screen deck, above burnt appearance, the sieve plate of exerting pressure is set, and the reactor loam cake is an one with exert pressure sieve plate and thermocouple; Thermocouple sheath inserts burnt appearance center, adjusts the sieve plate position of exerting pressure it just in time is covered on the burnt appearance;
Step 3, open the heating of electric furnace focusing appearance, 16 ℃/min of electric furnace programming rate, logical nitrogen protection after a burnt appearance temperature reaches 400 ℃, nitrogen feeding amount is 0.8L/min, keeps constant temperature 1h after making burnt appearance be warming up to 1250 ℃;
Step 4, exerting pressure downwards through the sieve plate focusing appearance constant speed of exerting pressure stops the burnt appearance of heating cooling behind the certain distance, and the speed of exerting pressure is 1cm/min, and the distance of exerting pressure is 3cm;
Step 5, the burnt appearance of screening residue, recording the above coke quality of 9.5mm grade is 161g, calculating the number percent that accounts for the burnt appearance of reaction back residue quality is that coke intensity CHS at high temperature is 88.
Embodiment 6
The method of test coke strenth under a kind of hot environment,
Step 1, choose the burnt appearance of the lump coke 200g that the 200g granularity is the 10-25mm regular shape;
Step 2, configure electric furnace and reacting furnace; One deck high aluminium ball in shop, reacting furnace bottom; Highly be taped against in the electric furnace flat-temperature zone; On blast furnace ball layer, fixed screen deck is set; Burnt appearance is placed on the fixed screen deck, above burnt appearance, the sieve plate of exerting pressure is set, and the reactor loam cake is an one with exert pressure sieve plate and thermocouple; Thermocouple sheath inserts burnt appearance center, adjusts the sieve plate position of exerting pressure it just in time is covered on the burnt appearance;
Step 3, open the heating of electric furnace focusing appearance, 10 ℃/min of electric furnace programming rate, logical nitrogen protection after a burnt appearance temperature reaches 400 ℃, nitrogen feeding amount is 1L/min, keeps constant temperature 2h after making burnt appearance be warming up to 1000 ℃;
Step 4, exerting pressure downwards through the sieve plate focusing appearance constant speed of exerting pressure stops the burnt appearance of heating cooling behind the certain distance, and the speed of exerting pressure is 1cm/min, and the distance of exerting pressure is 5cm;
Step 5, the burnt appearance of screening residue, recording the above coke quality of 9.5mm grade is 127g, calculating the number percent that accounts for the burnt appearance of reaction back residue quality is that coke intensity CHS at high temperature is 63.5.
Embodiment 7
The method of test coke strenth under a kind of hot environment,
Step 1, choose the burnt burnt appearance of the grain 95g that the 200g granularity is the 4-8mm regular shape;
Step 2, configure electric furnace and reacting furnace; One deck high aluminium ball in shop, reacting furnace bottom; Highly be taped against in the electric furnace flat-temperature zone; On blast furnace ball layer, fixed screen deck is set; Burnt appearance is placed on the fixed screen deck, above burnt appearance, the sieve plate of exerting pressure is set, and the reactor loam cake is an one with exert pressure sieve plate and thermocouple; Thermocouple sheath inserts burnt appearance center, adjusts the sieve plate position of exerting pressure it just in time is covered on the burnt appearance;
Step 3, open the heating of electric furnace focusing appearance, 8 ℃/min of electric furnace programming rate, logical nitrogen protection after a burnt appearance temperature reaches 400 ℃, nitrogen feeding amount is 0.5L/min, keeps constant temperature 30min after making burnt appearance be warming up to 1100 ℃;
Step 4, exerting pressure downwards through the sieve plate focusing appearance constant speed of exerting pressure stops the burnt appearance of heating cooling behind the certain distance, and the speed of exerting pressure is 1cm/min, and the distance of exerting pressure is 3cm;
Step 5, the burnt appearance of screening residue, recording the above coke quality of 3 grades is 47g, calculating the number percent that accounts for the burnt appearance of reaction back residue quality is that coke intensity CHS at high temperature is 49.5.
Embodiment 8
The method of test coke strenth under a kind of hot environment,
Step 1, choose the burnt burnt appearance of the grain 200g that the 200g granularity is the 4-8mm regular shape;
Step 2, configure electric furnace and reacting furnace; One deck high aluminium ball in shop, reacting furnace bottom; Highly be taped against in the electric furnace flat-temperature zone; On blast furnace ball layer, fixed screen deck is set; Burnt appearance is placed on the fixed screen deck, above burnt appearance, the sieve plate of exerting pressure is set, and the reactor loam cake is an one with exert pressure sieve plate and thermocouple; Thermocouple sheath inserts burnt appearance center, adjusts the sieve plate position of exerting pressure it just in time is covered on the burnt appearance;
Step 3, open the heating of electric furnace focusing appearance, 15 ℃/min of electric furnace programming rate, logical nitrogen protection after a burnt appearance temperature reaches 400 ℃, nitrogen feeding amount is 0.8L/min, keeps constant temperature 1h after making burnt appearance be warming up to 1250 ℃;
Step 4, exerting pressure downwards through the sieve plate focusing appearance constant speed of exerting pressure stops the burnt appearance of heating cooling behind the certain distance, and the speed of exerting pressure is 1cm/min, and the distance of exerting pressure is 5cm;
Step 5, the burnt appearance of screening residue, recording the above coke quality of 3mm grade is 87g, calculating the number percent that accounts for the burnt appearance of reaction back residue quality is that coke intensity CHS at high temperature is 43.5.
Claims (6)
1. the method for test coke strenth under the hot environment is characterized in that: may further comprise the steps,
Step 1, choose the burnt appearance of experiment, burnt appearance is divided into the lump coke of 10-25mm and burnt less than the grain of 10mm according to grade, and the quality of choosing burnt appearance is m;
Step 2, configure electric furnace and reacting furnace, one deck high aluminium ball in shop, reacting furnace bottom highly is taped against in the electric furnace flat-temperature zone, on blast furnace ball layer, fixed screen deck is set, and burnt appearance is placed on the fixed screen deck, above burnt appearance, the sieve plate of exerting pressure is set;
Step 3, open the heating of electric furnace focusing appearance, 8-16 ℃/min of electric furnace programming rate, logical nitrogen protection after a burnt appearance temperature reaches 400 ℃, nitrogen feeding amount is 0.5-1L/min, keeps constant temperature 30-120min after making burnt appearance be warming up to 1000-1250 ℃;
Step 4, exerting pressure downwards through the sieve plate focusing appearance constant speed of exerting pressure stops the burnt appearance of heating cooling behind the certain distance, and the speed of exerting pressure is 1cm/min, and the distance of exerting pressure is 1-5cm;
Step 5, the burnt appearance of screening residue, when burnt appearance during for lump coke screening choose 9.5mm with its quality of part of the body cavity above the diaphragm housing the heart and lungs appearance measurement m
1, screening is chosen 3mm and is measured its quality m with part of the body cavity above the diaphragm housing the heart and lungs appearance when burnt appearance is grain Jiao
1
The coke strenth CHS that calculates under the hot environment is:
CHS（%）=m
1/m×100 (1)。
2. the method for test coke strenth under the hot environment as claimed in claim 1 is characterized in that: said when choosing burnt appearance the choosing method of lump coke following, get coke at first in proportion greater than 25mm; Discard bubble Jiao and protect head Jiao with a formula crusher in crushing, mixing, division, sieve with 25mm and 21mm round-hole mesh, the 21mm screen overflow is got in, screening broken again greater than the coke button of 25mm; Remove the burnt and burnt division of strip of sheet; Place rotary drum more at twice,, change 50r with the rotating speed of 20r/min; Again with the screening of 21mm round-hole mesh, choose the 200g screen overflow after the taking-up as burnt appearance at every turn.
3. the method for test coke strenth under the hot environment as claimed in claim 1 is characterized in that: said when choosing burnt appearance the burnt choosing method of grain following, get coke at first in proportion greater than 10mm; Discard bubble Jiao and protect head Jiao with a formula crusher in crushing, mixing, division, sieve with 10mm and 6mm round-hole mesh, the 6mm screen overflow is got in, screening broken again greater than the coke button of 10mm; Remove the burnt and burnt division of strip of sheet; Place rotary drum more at twice,, change 50r with the rotating speed of 20r/min; Again with the screening of 6mm round-hole mesh, choose the 200g screen overflow after the taking-up as burnt appearance at every turn.
4. the method for test post reaction strength of coke under the hot environment is characterized in that: may further comprise the steps,
Step 1, choose the burnt appearance of experiment, burnt appearance is divided into the lump coke of 10-25mm and burnt less than the grain of 10mm according to grade, and the quality of choosing burnt appearance is m;
Step 2, configure electric furnace and reacting furnace, one deck high aluminium ball in shop, reacting furnace bottom highly is taped against in the electric furnace flat-temperature zone, on blast furnace ball layer, fixed screen deck is set, and burnt appearance is placed on the fixed screen deck, above burnt appearance, the sieve plate of exerting pressure is set;
Step 3, open the heating of electric furnace focusing appearance, 8-16 ℃/min of electric furnace programming rate, logical nitrogen protection after a burnt appearance temperature reaches 400 ℃, nitrogen feeding amount is 0.5-1L/min, keeps constant temperature and feeds CO after making burnt appearance be warming up to 1000-1250 ℃
2Reaction 30-120min, CO
2The feeding amount is 5L/min, closes CO after reaction finishes
2
Step 4, burnt kind of quality m of measurement reaction back residue
0, exerting pressure downwards through the sieve plate focusing appearance constant speed of exerting pressure then stops the burnt appearance of heating cooling behind the certain distance, and the speed of exerting pressure is 1cm/min, and the distance of exerting pressure is 1-5cm;
Step 5, the burnt appearance of screening residue, when burnt appearance during for lump coke screening choose 9.5mm with its quality of part of the body cavity above the diaphragm housing the heart and lungs appearance measurement m
1, screening is chosen 3mm and is measured its quality m with part of the body cavity above the diaphragm housing the heart and lungs appearance when burnt appearance is grain Jiao
1
The post reaction strength of coke CHSR that calculates under the hot environment is:
CHSR(%)=m
1/m
0?×100 (2)。
5. the method for test post reaction strength of coke under the hot environment as claimed in claim 4 is characterized in that: said when choosing burnt appearance the choosing method of lump coke following, get coke at first in proportion greater than 25mm; Discard bubble Jiao and protect head Jiao with a formula crusher in crushing, mixing, division, sieve with 25mm and 21mm round-hole mesh, the 21mm screen overflow is got in, screening broken again greater than the coke button of 25mm; Remove the burnt and burnt division of strip of sheet; Place rotary drum more at twice,, change 50r with the rotating speed of 20r/min; Again with the screening of 21mm round-hole mesh, choose the 200g screen overflow after the taking-up as burnt appearance at every turn.
6. the method for test post reaction strength of coke under the hot environment as claimed in claim 4 is characterized in that: said when choosing burnt appearance the burnt choosing method of grain following, get coke at first in proportion greater than 10mm; Discard bubble Jiao and protect head Jiao with a formula crusher in crushing, mixing, division, sieve with 10mm and 6mm round-hole mesh, the 6mm screen overflow is got in, screening broken again greater than the coke button of 10mm; Remove the burnt and burnt division of strip of sheet; Place rotary drum more at twice,, change 50r with the rotating speed of 20r/min; Again with the screening of 6mm round-hole mesh, choose the 200g screen overflow after the taking-up as burnt appearance at every turn.
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| CN103868815A (en) * | 2014-03-05 | 2014-06-18 | 首钢总公司 | Method for evaluating deterioration degree of coke at upper part of blast furnace |
| CN104697833A (en) * | 2015-03-05 | 2015-06-10 | 山东钢铁股份有限公司 | Standard sample for inspecting hot strength of coke and preparation method of standard sample |
| CN105115846A (en) * | 2015-09-02 | 2015-12-02 | 武钢集团昆明钢铁股份有限公司 | Precise, fast and visual coal gasification performance detecting method |
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