CN106802270B - A kind of dead stock column voidage measuring method of blast furnace - Google Patents
A kind of dead stock column voidage measuring method of blast furnace Download PDFInfo
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- CN106802270B CN106802270B CN201710039146.0A CN201710039146A CN106802270B CN 106802270 B CN106802270 B CN 106802270B CN 201710039146 A CN201710039146 A CN 201710039146A CN 106802270 B CN106802270 B CN 106802270B
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000000571 coke Substances 0.000 claims abstract description 86
- 238000006243 chemical reaction Methods 0.000 claims abstract description 20
- 230000008569 process Effects 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 239000002245 particle Substances 0.000 claims abstract description 12
- 230000035699 permeability Effects 0.000 claims abstract description 12
- 239000002893 slag Substances 0.000 claims abstract description 8
- 238000002309 gasification Methods 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 238000012216 screening Methods 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 3
- 239000012153 distilled water Substances 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000010792 warming Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims 1
- 239000003610 charcoal Substances 0.000 abstract description 13
- 238000005259 measurement Methods 0.000 abstract description 5
- 238000002474 experimental method Methods 0.000 abstract description 2
- 239000008187 granular material Substances 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000009533 lab test Methods 0.000 description 2
- 239000012495 reaction gas Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009830 intercalation Methods 0.000 description 1
- 230000002687 intercalation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/088—Investigating volume, surface area, size or distribution of pores; Porosimetry
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- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Manufacture Of Iron (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The present invention provides a kind of methods for measuring the dead stock column voidage of blast furnace, belong to blast furnace ironmaking field.500~1000g coke is taken by certain particle size composition, gasification reaction and high-temperature heat treatment are carried out using the equipment STRENGTH ON COKE such as high temperature process furnances and Ι type rotary drum, coke after heat treatment is further processed to prepare the coke in the dead stock column of certain mass approximation blast furnace crucibe through rotating drum experiments, measures its voidage (k by drainage1), while measuring its average particle size.Using the voidage (k of the coke of the same method measurement all average particle sizes of granule size2).Define k1/k2For voidage index, the feeding density charcoal under the granularmetric composition is characterized after physical-chemical reaction complicated in blast furnace, the voidage of dead stock column instructs the selection of the granularmetric composition of feeding density charcoal to reflect the liquid permeability of the dead stock column of cupola well under the conditions of certain Performance of Slag indirectly when reaching cupola well.
Description
Technical field
The present invention relates to a kind of methods for measuring the dead stock column voidage of blast furnace, belong to blast furnace ironmaking field.
Technical background
Engine of the cupola well as blast furnace is the source of heat and coal gas required for reduction reaction in blast furnace ironmaking process
Head determines the initial distribution of Gas Flow.To the heat distribution at cupola well interface and Temperature Distribution, and entire blast furnace is along height side
Upward air flow method and Temperature Distribution its important function.Meanwhile the first slag that cohesive zone is formed is needed through the dead stock column of cupola well
Gap drippage enter cupola well realize slag iron separation.Therefore the working condition of cupola well has key effect to the direct motion of blast furnace.
Cupola well activity is mainly by the ventilative liquid permeability of dead stock column coke, slag iron mobility and Tuyere Raceway position and size etc.
Three factors influence, under the premise of slag iron performance and raceway zone size are basic certain, the ventilative liquid permeability pair of the dead stock column of coke
The activity of cupola well has great influence.The dead ventilative liquid permeability difference of stock column easily causes hearth accumulation, gives blast furnace operating and high furnace superintendent
Longevity brings adverse effect.Production practices show that the ventilative liquid permeability of the dead stock column of blast furnace is not only related with the lumpiness of coke, also with coke
Voidage between charcoal particle is in close relations, and the ventilative liquid permeability of dead stock column is good when the voidage of coke is higher.Coke granule
Between voidage depend on the uniformity coefficient of dead stock column coke size, this granularmetric composition and coke with feeding density charcoal is in blast furnace
The physicochemical change of experience is related.About the hot performance of coke, blast furnace worker more pays close attention to coke and CO2Reaction
Property and post reaction strength, often think that reactivity is low, the ventilative liquid permeability of the high coke of post reaction strength and dead stock column is directly proportional, suddenly
Dead stock column voidage has been omited to the great influence of the ventilative liquid permeability of dead stock column.Study the blast furnace that varigrained feeding density charcoal is formed
The voidage of dead stock column is conducive to determine the granularmetric composition of reasonable feeding density charcoal, while the measurement of dead stock column voidage is conducive to
Cupola well activity is understood, to instructing blast fumance to be of great significance.But the method for measuring dead stock column voidage at present is only limitted to height
Method when furnace damping down using tuyere p robing measures the voidage of dead stock column, but is influenced by sampling gun insertion depth, gap
The accuracy of degree measurement needs to be advanced optimized.In addition, tuyere p robing measures the voidage of dead stock column only in blast furnace staying
It just can be carried out, be unfavorable for carrying out the real time measure to the dead stock column voidage that the feeding density charcoal that different grain size forms is formed.Therefore, have
Necessity proposes the experimental method of the measurement dead stock column coke voidage of blast furnace.
Summary of the invention
In order to solve the hot performance of current coke can not characterize comprehensively feeding density charcoal reach the dead stock column region of cupola well after
Ventilative liquid permeability, the present invention provides a kind of new methods for measuring the dead stock column voidage of blast furnace, solve the coke of different grain size composition
The voidage for the dead stock column coke that charcoal chemically reacts in blast furnace ironmaking process through a series of physical measures problem, and provides
The quantizating index for evaluating voidage size fills up existing laboratory test and evaluates sky present in dead stock column coke voidage
It is white.
The method of the dead stock column coke voidage of detection provided by the invention the following steps are included:
Step 1: it is spare that 500~1000g smelter coke is weighed by certain granularmetric composition；
Step 2: weighed coke is put into drying box, 4~8 hours dry at 105~150 DEG C；
Step 3: the coke sample is placed in high temperature process furnances (see attached drawing 1), N is passed through2And temperature programming to 1100~
1200 DEG C, constant temperature, heating rate is 10~15 DEG C/min, and nitrogen flow is 1~2L/min；Stop logical nitrogen, changes logical CO2, gas
Body flow control is 5~8L/min, reacts 2~3h；Stopping is passed through CO2, change logical N2, gas flow is 2~4L/min；
Step 4: high temperature process furnances continue to heat up, and are warming up to 1500~1550 DEG C with the heating rate of 10~15 DEG C/min,
Constant temperature 1h；High temperature process furnances are closed, continue to be passed through N2, it is slowly cooled to room temperature coke sample；
Step 5: coke sample after cooling is fully enclosed in Ι type rotary drum, turns 30min with the rate of 20r/min, in total
600r takes out coke screening, weighs, calculates the quality of each grade coke and find out average particle size (R)；
Step 6: the coke after reaction being impregnated for 24 hours~36 in water, it is made sufficiently to absorb water, and absorbs coke with filter paper
Surface moisture；
Step 7: will mark graduated 2000~5000ml beaker and be placed on balance, peeling, and it is burnt to be packed into that all treated
Charcoal makes its surfacing, and records balance registration (m at this time1)；Distilled water is poured slowly into beaker to just submergence coke sample
Product, recording balance registration (m2) and the total volume (V) of coke and water at this time；
Step 8: by m2And m1Difference, the density of water and coke and water total volume V can calculate reaction after coke
Voidage k1；Coke of the same race is taken, the method for using crushing and screening prepares quality as m1, granularity is the coke sample of R, is repeated
The operation of step 6 and step 7 calculates the voidage k that granularity is the coke of R2。
Step 9: k1/k2It is denoted as the sky of coke of the coke of certain particle size composition after gasification reaction, heat treatment and rotary drum
Porosity index, voidage is higher after the bigger coke for illustrating the granularmetric composition of value reaches cupola well, in the certain item of Performance of Slag
Be conducive to improve the liquid permeability of the dead stock column of blast furnace under part.
Compared with existing measuring method, beneficial achievement of the invention is:
1) it has filled up laboratory test and has evaluated blank present in dead stock column coke voidage；
2) sample is the coke of certain particle size composition, can determine reasonable feeding density charcoal according to voidage index calculated result
Granularmetric composition provides quantitative basis for blast furnace feeding coke size composition；
3) continuous mode consider gasification reaction simultaneously, the focusing such as frictional impact during high temperature and coke descent in cupola well
The influence that charcoal granularity degrades, actual conditions of the obtained voidage measurement result close to the dead stock column of blast furnace.
Detailed description of the invention
Fig. 1 is high-temperature tubular furnace apparatus, wherein 1 is high temperature process furnances, 2 be reaction tube, and 3 be gas-guide tube, and 4 be gas flow
Meter, 5 be temperature controller, and 6 be galvanic couple.
Corundum pyroreaction pipe is located at tube furnace center, and high temperature resistant gas-guide tube is passed through reaction gas by reaction bottom of the tube
Body, and connect with gas flowmeter and gas cylinder, convenient for controlling the reaction gas flow being passed through.Meanwhile galvanic couple is by reaction bottom of the tube
It in intercalation reaction pipe below the bed of material, and is connect with temperature controller, guarantees the accurate of temperature increasing schedule.
Specific embodiment
Step 1: it is spare that 500~1000g smelter coke is weighed by the granularmetric composition of blast furnace feeding coke；
Step 2: weighed coke is put into drying box, 4~8 hours dry at 105~150 DEG C；
Step 3: the coke sample is placed in high temperature process furnances (see attached drawing 1), N is passed through2And temperature programming to 1100~
1200 DEG C, constant temperature, heating rate is 10~15 DEG C/min, and nitrogen flow is 1~2L/min；Stop logical nitrogen, changes logical CO2, gas
Body flow control is 5~8L/min, reacts 2~3h；Stopping is passed through CO2, change logical N2, gas flow is 2~4L/min；
Step 4: high temperature process furnances continue to heat up, and are warming up to 1500~1550 DEG C with the heating rate of 10~15 DEG C/min,
Constant temperature 1h；High temperature process furnances are closed, continue to be passed through N2, it is slowly cooled to room temperature coke sample；
Step 5: coke sample after cooling is fully enclosed in Ι type rotary drum, turns 30min with the rate of 20r/min, in total
600r takes out coke screening, weighs, calculates the quality of each grade coke and find out average particle size (R)；
Step 6: the coke after reaction being impregnated for 24 hours~36 in water, it is made sufficiently to absorb water, and absorbs coke with filter paper
Surface moisture；
Step 7: will mark graduated 2000~5000ml beaker and be placed on balance, peeling, and it is burnt to be packed into that all treated
Charcoal makes its surfacing, and records balance registration (m at this time1)；Distilled water is poured slowly into beaker to just submergence coke sample
Product, recording balance registration (m2) and the total volume (V) of coke and water at this time；
Step 8: by m2And m1Difference, the density of water and coke and water total volume V can calculate reaction after coke
Voidage k1；Coke of the same race is taken, the method for using crushing and screening prepares quality as m1, granularity is the coke sample of R, is repeated
The operation of step 6 and step 7 calculates the voidage k that granularity is the coke of R2。
Step 9: k1/k2It is denoted as the sky of coke of the coke of certain particle size composition after gasification reaction, heat treatment and rotary drum
Porosity index, voidage is higher after the bigger coke for illustrating the granularmetric composition of value reaches cupola well, in the certain item of Performance of Slag
Be conducive to improve the liquid permeability of the dead stock column of blast furnace under part.
Claims (2)
1. a kind of dead stock column voidage measuring method of blast furnace, it is characterised in that the following steps are included:
Step 1: it is spare that 500~1000g smelter coke is weighed by certain granularmetric composition；
Step 2: weighed coke is put into drying box, 4~8 hours dry at 105~150 DEG C；
Step 3: the coke sample is placed in high temperature process furnances, N is passed through2And temperature programming is extremely
1100~1200 DEG C, constant temperature, heating rate is 10~15 DEG C/min, and nitrogen flow is 1~2L/min；Stop logical nitrogen,
Change logical CO2, gas flow control is 5~8L/min, reacts 2~3h；Stopping is passed through CO2, change logical N2, gas flow is 2~4L/
min；
Step 4: high temperature process furnances continue to heat up, and are warming up to 1500~1550 DEG C with the heating rate of 10~15 DEG C/min, constant temperature
1h；High temperature process furnances are closed, maintenance is passed through N2, it is slowly cooled to room temperature coke sample；
Step 5: coke sample after cooling is fully enclosed in Ι type rotary drum, turns 30min with the rate of 20r/min, in total 600r,
It takes out coke screening, weigh, calculate the quality of each grade coke and find out average particle size (R)；
Step 6: impregnating 24~36h for the coke after reaction in water, it made sufficiently to absorb water, and absorbs coke surface with filter paper
Moisture；
Step 7: will mark graduated 2000~5000ml beaker and be placed on balance, peeling, be packed into all treated coke,
Make its surfacing, and records balance registration at this time, m1；Be poured slowly into beaker distilled water to just submerge coke sample,
Recording balance registration, m2And the total volume of coke and water at this time, V；
Step 8: by m2And m1Difference, the density of water and coke and water total volume V can calculate reaction after coke sky
Porosity k1；Coke of the same race is taken, the method for using crushing and screening prepares quality as m1, granularity is the coke sample of R, repeats step
Six and step 7 operation, calculate granularity be R coke voidage k2；
Step 9: k1/k2It is denoted as the voidage of coke of the coke of certain particle size composition after gasification reaction, heat treatment and rotary drum
Coefficient.
2. the dead stock column voidage measuring method of a kind of blast furnace according to claim 1, which is characterized in that it is characterized by:
Voidage index characterizes the size of coke voidage after gasification reaction, heat treatment and rotary drum of certain particle size composition, is worth bigger
Voidage is higher after illustrating the coke arrival cupola well of the granularmetric composition, is conducive to improve blast furnace under conditions of Performance of Slag is certain
The liquid permeability of dead stock column.
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| CN107860680B (en) * | 2017-12-19 | 2020-07-03 | 武汉钢铁有限公司 | Analysis method for blast furnace tuyere coke granularity composition and slag retention |
| CN111610305B (en) * | 2020-04-28 | 2021-11-09 | 北京科技大学 | Method for quantitatively evaluating crushing resistance and wear resistance of iron alloy for steelmaking by using rotary drum |
| CN114371113A (en) * | 2021-12-07 | 2022-04-19 | 北京科技大学 | Device and method for measuring influence of coke lumpiness on permeability and liquid permeability of blast furnace |
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| CN101135632A (en) * | 2006-08-31 | 2008-03-05 | 上海梅山钢铁股份有限公司 | Charred coal porosity measuring equipment and measuring method thereof |
| CN104374681A (en) * | 2014-11-11 | 2015-02-25 | 首钢总公司 | Method for measuring coke parameter |
| CN106154868B (en) * | 2015-03-26 | 2018-11-23 | 上海梅山钢铁股份有限公司 | A kind of blast-furnace tuyere coke size hierarchical control method |
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