CN105842111B - The detection method of smelter coke gasification activity and post reaction strength - Google Patents
The detection method of smelter coke gasification activity and post reaction strength Download PDFInfo
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- CN105842111B CN105842111B CN201610376986.1A CN201610376986A CN105842111B CN 105842111 B CN105842111 B CN 105842111B CN 201610376986 A CN201610376986 A CN 201610376986A CN 105842111 B CN105842111 B CN 105842111B
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- 239000000571 coke Substances 0.000 title claims abstract description 101
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 72
- 238000002309 gasification Methods 0.000 title claims abstract description 20
- 238000001514 detection method Methods 0.000 title description 9
- 230000000694 effects Effects 0.000 title description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 22
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 18
- 230000009257 reactivity Effects 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 239000007789 gas Substances 0.000 claims abstract description 13
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 11
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 10
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 8
- 238000012360 testing method Methods 0.000 claims abstract description 8
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 5
- 239000010431 corundum Substances 0.000 claims abstract description 5
- 230000004580 weight loss Effects 0.000 claims description 10
- 238000010998 test method Methods 0.000 abstract 1
- 229910052799 carbon Inorganic materials 0.000 description 8
- 208000016261 weight loss Diseases 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 239000003054 catalyst Substances 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 235000019580 granularity Nutrition 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000003610 charcoal Substances 0.000 description 2
- 238000004939 coking Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels; Explosives
- G01N33/222—Solid fuels, e.g. coal
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Coke Industry (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The present invention provides a kind of test method of smelter coke and carbon dioxide gasification reactivity and post reaction strength.This method can simulate coke in blast furnace after gasification reaction macrodynamics behavior.The coke that granularity is 23 ~ 25mm, quality is 200 ± 0.5g is fitted into the corundum crucible of surrounding and bottom with several holes.Crucible internal diameter is 75 ~ 80mm, high 100 ~ 150mm.Sample is heated using big weight thermogravimetric analyzer, heating rate is 5 DEG C/min.Furnace temperature reaches the nitrogen that 2L/min is passed through after 300 DEG C.After furnace temperature reaches 900 DEG C, heating rate, which is changed to 2 DEG C/min, to be continued to heat up, and gas is changed to the carbon dioxide of 5L/min.When furnace temperature reaches 1050 DEG C.Will heat up rate and be changed to 5 DEG C/min and continue to heat up, sample weightlessness stops heating after reaching 25%, is passed through the nitrogen of 2L/min, until sample be cooled to 200 DEG C or less after progress strength tests.Coke reaction starting temperature, the low-temp reaction of coke and the high-temperature reactivity of coke are calculated by the thermogravimetric curve of coke.
Description
Technical field
The invention belongs to coking technology fields, the more particularly to detection of blast furnace coke reactivity and post reaction strength.
Background technology
Coke provides heat, reducing agent for blast furnace ironmaking, while being also the stock column skeleton of blast furnace.Coke exists with carbon dioxide
Certain temperature issues the reducing agent that the carbon monoxide that raw gasification reaction generates is ferriferous oxide.Gasification reaction is generating reducing agent
The carbon for also consuming coke simultaneously, keeps the air vent wall of coke thinning, therefore the intensity of coke can decline.
The reactivity and post reaction strength of coke are always the index smelted iron with coking industry concern.It is now widely used
The method for detecting coke reactivity and post reaction strength is GB/T 4000-2008.Party's law regulation 200g granularities are 23 ~ 25mm
Coke in 1100 DEG C and CO2120min is reacted, using the percentage that coke quality loses as the reactivity indexes of coke
（CRI）, the coke specimen after reaction is packed into I type rotary drums, with the rotating speed corotation 30min of 20r/min, total revolution is 600r,
It is sieved with the round-hole mesh of φ 10mm after taking-up, to sieve the percentage of coke after upper coke accounts for reaction as post reaction strength（CSR）.
The detection method makes coke be reacted under constant temperature and constant atmosphere, easy to operation, has reacted the gas of coke to a certain extent
Change the intensity after respond and reaction.
However, there are also shortcomings for this method.First, in blast furnace the temperature range of gasification reaction occurs for coke about
It it is 900 ~ 1300 DEG C, reaction atmosphere is also varied from different zones.In addition, gasification reaction carbon loss amount of the coke in blast furnace is several
Be it is fixed, about 25%, and CSR test in secure the reaction time, the carbon loss amount of coke can not fix.
CN101936979A discloses a kind of assay method of blast furnace coke post reaction strength, using three-dimensional water-cooled electricity
Sub- balance detects the weight-loss ratio of coke in real time.Lead to nitrogen when coke bed of material central temperature reaches 400 DEG C, when coke is 780 DEG C,
Carbon dioxide gas after logical preheating, for coke with the heating of the speed of 10 DEG C/min since 800 DEG C ing, 1030 DEG C of whens, reach setting
Weight-loss ratio, at this time heating furnace start to keep constant temperature constant, until Accumulative weight loss rate reaches 25%, close carbon dioxide gas, lead to
Nitrogen cools down.Coke specimen after reaction is packed into I type rotary drums, with the rotating speed corotation 30min of 20r/min, total revolution is
600r is sieved after taking-up with φ 10mm round-hole meshes, to sieve the percentage of coke after upper coke accounts for reaction as post reaction strength.
CN101825548A discloses a kind of detection method of coke reactivity and post reaction strength, by Ф 80 × 1000
The corundum reaction tube and reaction tube sealing sleeve pipe and reaction pipe holder of mm is sitting on electronic balance together, is connected by electronic balance
The weight change of continuous detection coke specimen during the reaction.Coke rises to 400 DEG C ~ 500 DEG C under nitrogen protection, then
Change the CO that through-current capacity is 5L/min ~ 10L/min2Gas, heating furnace rise to 1100 with the heating rate of 5 DEG C/min~10 DEG C/min
DEG C constant temperature is to weight-loss ratio 20%~30%.Coke specimen after reaction is packed into I type rotary drums, with the rotating speed corotation of 20r/min
30min, total revolution are 600r, then take out and are sieved with φ 10mm round-hole meshes, to sieve the percentage that upper coke accounts for coke after reaction
As post reaction strength.
The gasification reaction macrodynamics behavior for the temperature changing regularity and coke that above-mentioned patent is not directed in blast furnace is set
Measure method for testing.According to the temperature change feature in blast furnace, three regions can be classified as：First heat exchange zone, hot reserve
Area, the second heat exchange zone, as shown in Figure 1.The temperature of first heat exchange zone is about 300 ~ 900 DEG C, in this temperature range, temperature ladder
Degree is big, but coke and CO has not yet been reached2Reaction enlivens temperature.The temperature in hot reserve area is about 900 ~ 1050 DEG C, in this region
Temperature change is slow, and gasification reaction just takes place in coke, and since reaction temperature is not high, reaction rate is slower, and gas is easy
It is diffused into inside coke.Second heat exchange zone temperature is generally at 1000 ~ 1050 DEG C or more, this area temperature gradient is big, due to temperature
Degree is higher, and reaction is very fast, and gas has little time to spread to the inside of coke, is just reacted away in away from surface certain depth, with temperature
Spend it is higher and higher, reaction gas once contact coke react, carbon nearly all coke surface consume.Coke is in not equality of temperature
Gasification reaction behavior under degree has significant impact to post reaction strength.
The present invention is directed to above-mentioned rule, the detection method of design coke gasification and cracking property after reaction.
Invention content
The object of the present invention is to provide a kind of method of detection coke reactivity and post reaction strength, this method can be simulated
Coke in blast furnace after gasification reaction macrodynamics behavior, detection method includes the following steps：
（1）It is 75 ~ 80mm that the coke that 200 g granularities are 23 ~ 25mm, which is packed into the internal diameter of surrounding and bottom with several holes,
In the corundum crucible of high 100 ~ 150mm.（2）Sample is heated using big weight thermogravimetric analyzer, heating rate is 5 DEG C/min.
Furnace temperature reaches the nitrogen protection sample that 2L/min is passed through after 300 DEG C.Furnace temperature reach 900 DEG C after, will heat up rate be changed to 2 DEG C/
Min continues to heat up, and gas is changed to the carbon dioxide of 5L/min.When furnace temperature reaches 1050 DEG C.Will heat up rate be changed to 5 DEG C/
Min continues to heat up, until sample percent weight loss stops heating after reaching 25%, gas is changed to the nitrogen of 2L/min, until examination
Sample is cooled to 200 DEG C or less.（3）Corresponding temperature opening as coke when reaching 0.02 %/min using coke gasification rate
Beginning reaction temperature（T0）, percent weight loss of the coke before 1050 DEG C is calculated as low-temp reaction（Reactivity at
Low Temperature, RLT）, vector percentage of the coke between 1100 ~ 1200 DEG C is calculated as high-temperature reactivity
（Reactivity at High Temperature, RHT）.Coke specimen after reaction is packed into I type rotary drums, with 20r/
The rotating speed corotation 30min of min, total revolution are 600r, are sieved with φ 10mm round-hole meshes after taking-up, are accounted for the upper coke of sieve burnt after reacting
The percentage of charcoal is as post reaction strength（Post-reaction Strength, PRS）.
The beneficial effect comprise that：
（1）It is slow according to hot reserve area temperature change in blast furnace, and the very fast feature of the second heat exchange zone temperature change is set
Regular inspection surveys system, and coke specimen first undergoes the lower Control of chemical reaction pattern of reaction temperature, then to be gradually transferred to temperature higher
Mix control model and interior diffusion control model.Coke strenth after reaction can more react its cracking behavior in blast furnace.（2）
Heating rate is slow within the scope of 900 ~ 1050 DEG C, and the coke reaction starting temperature of measurement is more accurate.（3）With low-temp reaction and
High-temperature reactivity can reflect the gasification reaction ability of coke more comprehensively.
Description of the drawings
Fig. 1 is temperature changing regularity schematic diagram in blast furnace.
Fig. 2 is the thermogravimetric change curve for the coke that the present invention detects.
Specific implementation mode
（1）It is 23 ~ 25mm that coke specimen to be measured, which is machined to granularity, is packed into surrounding and bottom carries the internal diameter of several holes
For 80 mm, in the corundum crucible of high 150 mm；（2）Sample is heated using big weight thermogravimetric analyzer, heating rate be 5 DEG C/
Min, furnace temperature reach the nitrogen protection sample that 2L/min is passed through after 300 DEG C.After furnace temperature reaches 900 DEG C, it will heat up rate and be changed to 2
DEG C/min continues to heat up, gas is changed to the carbon dioxide of 5L/min.When furnace temperature reaches 1050 DEG C.It will heat up rate and be changed to 5
DEG C/min continues to heat up, until sample percent weight loss stops heating after reaching 25%, gas is changed to the nitrogen of 2L/min, directly
It is cooled to 200 DEG C or less to sample.（3）The reaction starting temperature of coke is obtained according to the thermogravimetric change curve of coke（T0, with anti-
Rate is answered to reach 0.02 %/min meters）, low-temp reaction weight-loss ratio（RILT）With pyroreaction rate（RIHT）.By the coke after reaction
Charcoal sample is packed into I type rotary drums, and with the rotating speed corotation 30min of 20r/min, total revolution is 600r, then takes out and is justified with φ 10mm
Hole sizer sieves, to sieve the percentage of coke after upper coke accounts for reaction as post reaction strength.Obtained coke reactivity and reaction
Strength test results see the table below afterwards.
Coke specimen B, C, D, E are to add the high response coke sample prepared after catalyst in table, and Sample A is to be not added with
Coke sample prepared by the former mixed coal of catalyst.Coke is opened after the T0 tested through the invention has reacted addition catalyst
The effect that beginning gasification temperature reduces, RLT and RHT reacted respectively coke cold stage and hot stage gasification activity
Energy.PRS reflects coke gasification after anti-after being increasingly turned to mixing control and interior diffusion control by Control of chemical reaction
It should rear intensity.Based on the above results, the catalytic effect of sample C either catalyst or post reaction strength are all best.And
It is unable to get above-mentioned conclusion by conventional method.
Sample F and G are two kinds of industry coke in table, although the comparison by the present invention and national standard test can be found that G's and F
CRI differs only by 2.3, but reaction starting temperature differs 20 DEG C.RLT indexs show that coke F is remote in the carbon loss rate in low-temp reaction stage
Far above coke G.Low-temp reaction stage chemical account for it is leading, so the matrix of coke F（Air vent wall）Reactivity is apparent high
In coke G.Since low-temp reaction carbon not only in coke surface but is showing that very deep has loss away from coke, so coke
The post reaction strength of F is slightly below coke G.The test result of the present invention can not only reflect the performance of coke, moreover it is possible to deeper
Explain its reason.
Claims (2)
1. a kind of method that smelter coke is tested with carbon dioxide gasification reactivity and post reaction strength：Use big weight thermogravimetric point
Analyzer heats coke specimen, and heating rate is 5 DEG C/min, and furnace temperature reaches the nitrogen protection examination that 2L/min is passed through after 300 DEG C
Sample after furnace temperature reaches 900 DEG C, will heat up rate and be changed to 2 DEG C/min and continue to heat up, gas is changed to the carbon dioxide of 5L/min,
When furnace temperature reaches 1050 DEG C, it will heat up rate and be changed to 5 DEG C/min and continue to heat up, until after sample percent weight loss reaches 25%
Stop heating, gas is changed to the nitrogen of 2L/min, until sample carries out strength test after being cooled to 200 DEG C or less.
2. the method as described in claim 1, it is characterised in that：(1) every time test by granularity be 23~25mm, quality 200
In corundum crucible of around the coke of ± 0.5g the is fitted into and bottom with several holes, crucible internal diameter is 75~80mm, high by 100~
150mm；(2) temperature when reaching 0.02%/min using coke gasification reaction rate calculates coke as the reaction starting temperature of coke
Low-temp reaction sex index of the percent weight loss as coke before 1050 DEG C calculates coke between 1100~1200 DEG C
Pyroreaction sex index of the vector percentage as coke；(3) coke specimen after reaction is packed into I type rotary drums, with 20r/
The rotating speed corotation 30min of min, total revolution are 600r, then take out and are sieved with φ 10mm round-hole meshes, after accounting for reaction with the upper coke of sieve
The percentage of coke is as post reaction strength of coke.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108106961A (en) * | 2016-11-25 | 2018-06-01 | 上海梅山钢铁股份有限公司 | A kind of detection method of blast furnace ironmaking coke reactivity |
| CN110487666A (en) * | 2018-05-15 | 2019-11-22 | 宝山钢铁股份有限公司 | A kind of equipment measuring coal/coke ash method and its application |
| CN111650079A (en) * | 2020-04-26 | 2020-09-11 | 河钢股份有限公司 | Method for measuring thermal strength of coke after reaction suitable for blast furnace operation condition |
| CN112557238A (en) * | 2020-12-22 | 2021-03-26 | 山西晋煤集团技术研究院有限责任公司 | Method for detecting thermal reaction strength of smokeless lump coal |
| CN113376352B (en) * | 2021-05-26 | 2023-06-16 | 鞍钢集团北京研究院有限公司 | Method for measuring high-temperature reactivity index of coke |
| CN114486794B (en) * | 2022-01-25 | 2024-01-26 | 华北理工大学 | Cogasification reaction detection device and method for coke, water vapor and carbon dioxide |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825548A (en) * | 2010-04-28 | 2010-09-08 | 辽宁科技大学 | Detection method and device of coke reactivity and post-reaction heat-treatability |
| CN203606355U (en) * | 2013-12-12 | 2014-05-21 | 武汉钢铁(集团)公司 | Device for stimulating blast-furnace coke degradation process |
| CN103808623A (en) * | 2014-02-20 | 2014-05-21 | 武钢集团昆明钢铁股份有限公司 | Method for detecting reactivity and post-reaction strength of coke |
-
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- 2016-05-31 CN CN201610376986.1A patent/CN105842111B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825548A (en) * | 2010-04-28 | 2010-09-08 | 辽宁科技大学 | Detection method and device of coke reactivity and post-reaction heat-treatability |
| CN203606355U (en) * | 2013-12-12 | 2014-05-21 | 武汉钢铁(集团)公司 | Device for stimulating blast-furnace coke degradation process |
| CN103808623A (en) * | 2014-02-20 | 2014-05-21 | 武钢集团昆明钢铁股份有限公司 | Method for detecting reactivity and post-reaction strength of coke |
Non-Patent Citations (3)
| Title |
|---|
| 《Post-reaction Strength of Catalyst-added Highly Reactive Coke》;Seiji NOMURA et al.;《ISIJ International》;20071231;第47卷(第6期);第831-839页 * |
| 《小颗粒冶金焦炭气化反应性的检测方法》;沈杰 等.;《2015焦化行业节能减排及干熄焦技术交流会论文集》;20151231;第13-15页 * |
| 《试论高炉用焦炭的反应性和反应后强度》;胡源申.;《江苏冶金》;19841231(第2期);第64-75页 * |
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