CN105778960B - A kind of control method of the degree of shrinkage of different in moisture as-fired coal - Google Patents
A kind of control method of the degree of shrinkage of different in moisture as-fired coal Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/04—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition
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Abstract
The invention discloses a kind of control methods of the degree of shrinkage of different in moisture as-fired coal, belong to metallurgical coal-blending coking technical field, which includes the following steps：1) benchmark mixed coal is selected；2) production application mixed coal is selected；3) 2# coordinates coal coking processing；4) shrinking percentage is evaluated；If 2# mixed coals meet production application, evaluation procedure terminates, if being unsatisfactory for production application, can adjust the moisture of 2# mixed coals, or increase degree of shrinkage X>35mm, the coking coal dosage of b≤0%, this method can be on the basis of meeting charge of coke smooth coke pushing, by the moisture of control as-fired coal, coking energy consumption is made to reach minimum, it can be with optimizing blending plan, under the premise of keeping cooperation moisture content of coal constant, ensure coke shrinkage, therefore can realize that coking production is smooth.
Description
Technical field
The invention belongs to metallurgical coal-blending coking technical fields, more particularly to a kind of degree of shrinkage of different in moisture as-fired coal
Control method.
Background technology
Coke pushing is smoothly the essential condition that coke oven normally produces and coke oven safety and long-lived key influence factor, is
Ensure that coke oven coke-pusher must smoothly control rational as-fired coal degree of shrinkage, with the construction of domestic coal humidifying technology, operation and state
The improvement of inside and outside the pre-heat treatment coking coal technique, coke oven as-fired coal is after the pre-heat treatment, and moisture is from 11% in conventional produce
Left and right can be down to 2%, even lower.And moisture reduces, and reduces since moisture evaporation generates the shrinkage of stomata, moisture is got over
Low, coke shrinkage amount declines more apparent.If not taking regulating measures, it will cause coke pushing difficult, seriously affect coke oven and normally give birth to
Production, safety and longevity.
Since coke oven is once constructed and put into operation, parameters are smaller to the influence for adjusting coke shrinkage degree, and as-fired coal is matched
Texture of coal is significantly adjusted, and degree of shrinkage variation is apparent, but how to determine that the Coal Blending Schemes of certifiable smooth coke pushing become skill
Art problem.
Currently, wet coal top dress coking has accumulated many decades experience, rationally shrinks and smoothly coke pushing can adjust by rule of thumb, and into
As-fired coal degree of shrinkage after row moisture regulation can not carry out empirical evaluation and adjustment, and due to coke oven parameter, coke furnace carbonization chamber stove
The difference of condition is different to degree of shrinkage demand, is required to a kind of scientific and rational evaluation method, determines that can quasi- production decision protect
Smooth coke pushing is demonstrate,proved, the matter of utmost importance of coke oven production is solved.
Chinese invention patent application (application publication number：CN102010735A, data of publication of application：2011-04-13) disclose
A kind of blending method of the large-scale coking chamber coke oven with width as-fired coal degree of shrinkage of control, include the following steps：It is high to count existing carbonization chamber
Degree is 6 meters of coke oven coal blending degree of shrinkage, and it is average to calculate 6 meters of coke oven coal blending degrees of shrinkage according to 6 meters of coke oven coal blending degree of shrinkage statistical values
Value；Calculate the coal blending degree of shrinkage range of large-scale coking chamber coke oven with width；According to the large-scale coking chamber coke oven with width coal blending degree of shrinkage of calculating
Range, the corresponding allocation ratio for increasing high convergency degree coking coal coal carry out coal blending, the degree of shrinkage of gained coal blending are measured, if controlling
Range processed, you can determine that Coal Blending Schemes carry out coal-blending coking, if not in control range, it is corresponding to increase and decrease high convergency degree coking coal
The allocation ratio of kind carries out coal blending and simultaneously detects degree of shrinkage, until the coal blending degree of shrinkage measured value of gained Coal Blending Schemes is in control model
In enclosing, as large-scale coking chamber coke oven with width Coal Blending Schemes.The coal that this method is allotted can be under large-scale wide oven chamber environment, coking
Degree of shrinkage is reasonable in the process, improves coke quality.
《Fuel and chemical industry》, Jul.2015, Vol.46, No.4 reports as-fired coal moisture regulation STRENGTH ON COKE index and heating
Influence, have studied the influence of as-fired coal moisture STRENGTH ON COKE cold strength, granularity etc..Compare same highly coaling and with dry coal amount
The difference of Center Temperature of Coke Cake under different height loading condition.Test result shows when as-fired coal moisture is reduced, butt coking
Rate improves, but coke shrinkage rate reduces, and coke cold strength improves, and especially post reaction strength of coke promotes apparent, coke grain
Degree is in reduction trend, and coke uniformity improves；In the case where keeping identical dry coal amount, moisture is fewer, and heating rate is faster.
Invention content
To solve the above problems, the present invention provides a kind of control method of the degree of shrinkage of different in moisture as-fired coal, pass through
Using formula, quantitative analysis degree of shrinkage, the Pre-Evaluation of degree of shrinkage before being produced, guidance adjustment as-fired coal degree of shrinkage is to ensure
Coke oven production direct motion.
A kind of control method of the degree of shrinkage for different in moisture as-fired coal that the present invention designs, the control method include following step
Suddenly：
1) benchmark mixed coal is selected：The moisture of the benchmark mixed coal is defined as 1# mixed coals between 10%~11%；
Coking, the shrinking percentage for measuring 1# mixed coals are S1；
2) production application mixed coal is selected：It is 2# mixed coals to define the production application mixed coal, measures the 2# cooperations
The moisture of coal is M；And predict the shrinking percentage S of 2# mixed coals0Reasonable value：Using formula：S1- 0.3%≤S0≤S1+ 0.3%,
S0To predict the shrinking percentage of 2# mixed coals；
3) to 2# cooperation coal coking processing：The shrinking percentage that practical coking measures 2# mixed coals is S2；
4) shrinking percentage is evaluated：If S2≥S1- 0.3% or S2Value meet S in the step 2)0Value range, then it is described
2# mixed coals can be used as production application, and evaluation procedure terminates；
5) shrinking percentage of 2# mixed coals is adjusted：If S2＜ S1- 0.3%, then the 2# mixed coals not can be used as production application,
Evaluation procedure continues, and the Adjusted Option of 2# mixed coal shrinking percentages includes：
Scheme one：Adjust the moisture of the 2# mixed coals：
The step of 2# mixed coals adjustment moisture, is as follows：
A) upper limit value of as-fired coal moisture is calculated：Using formula：S3=k1×M1+b1, M1Coordinate the upper limit of moisture content of coal for 2#
Value, S3=S1+ 0.3%, and 0 ＜ k1≤ 0.7,0 ＜ b1≤ 12, by S3、k1And b1Bring formula into：S3=k1×M1+b1, it is calculated
M1；
B) lower limiting value of as-fired coal moisture is calculated：Using formula：S4=k2×M2+b2, M2Coordinate the lower limit of moisture content of coal for 2#
Value, S4=S1- 0.3%, and 0 ＜ k2≤ 0.6,0 ＜ b2≤ 10, by S4、k2And b2Bring formula into：S4=k2×M2+b2, calculate
To M2；
C) the moisture control range of 2# mixed coals is obtained：The moisture M of 2# mixed coals is controlled in M2~M1Between.
Further, the Adjusted Option of the 2# mixed coals shrinking percentage further includes：
Scheme two：Increase degree of shrinkage X>35mm, the coking coal dosage of b≤0%, makes the shrinking percentage of 2# mixed coals meet public affairs
Formula：S1- 0.3%≤S2≤S1+ 0.3%.
Still further, the scheme of adjustment 2# mixed coal shrinking percentages further includes the estimation to as-fired coal moisture in step 5)：
Using formula：SIt is low=SIt is high(1-MIt is low/MIt is high)×SIt is high, and SIt is low=S1- 0.3%, SIt is high=S1+ 0.3%, MIt is lowFor low moisture mixed coal
Moisture, MIt is highFor the moisture of high-moisture mixed coal, and MIt is low/MIt is highValue can be fluctuated in the range of ± 0.3.
Further, the moisture of the benchmark mixed coal is between 10.3%~10.7%.
Further, 0 ＜ k1≤ 0.5,0 ＜ b1≤10；0 ＜ k2≤ 0.4,0 ＜ b2≤8。
The operation principle of control method of the present invention is：The shrinking percentage S of benchmark mixed coal is measured first1, then measure quasi- life
Produce the shrinking percentage S of mixed coal2, work as S2≥S1- 0.3%, quasi- production mixed coal can serve as production application, if S2＜ S1
0.3%, need the shrinking percentage to quasi- production mixed coal to be adjusted, there are two Adjusted Options, and the first adjustment scheme is to quasi- life
The moisture of production mixed coal is adjusted, by calculating the upper limit value and upper limit value of as-fired coal moisture, to determine quasi- production mixed coal
Moisture control range, to be adjusted；Second Adjusted Option is direct increase degree of shrinkage X>35mm, the refining of b≤0%
Coking coal dosage makes the shrinking percentage coincidence formula of 2# mixed coals：S1- 0.3%≤S2≤S1+ 0.3%.
The beneficial effects of the present invention are：
1, this method, by controlling the moisture of as-fired coal, can make coking energy consumption on the basis of meeting charge of coke smooth coke pushing
Reach minimum.
2, this method can ensure coke shrinkage with optimizing blending plan, under the premise of keeping cooperation moisture content of coal constant, increase and receive
Contracting degree x>35mm, the coking coal dosage of b≤0%.
3, it is smooth can to realize that coking produces for this method, the final stabilization for ensureing coking furnace shaft and longevity.
Specific implementation mode
In order to preferably explain the present invention, below in conjunction with the specific embodiment main contents that the present invention is furture elucidated, but
Present disclosure is not limited solely to following embodiment.
Embodiment 1
It selects benchmark mixed coal, moisture 10.7% to be defined as 1# mixed coals, then 1# mixed coals is carried out at coking
Reason, measures its shrinking percentage S1It is 7.9%, using formula S0=S1± 0.3%, so that it may to predict to intend the receipts of production application mixed coal
Shrinkage S0Reasonable value, between 7.6~8.2%；
It is 2# mixed coals that production application mixed coal is intended in definition, and it is 10.3% to measure its moisture, and is refined 2# mixed coals
Coke processing, measures the practical shrinking percentage S of 2# mixed coals2Actually 7.7%；
The practical shrinking percentage S of 2# mixed coals2Meet 7.6~8.2% range, therefore the 2# mixed coals can be used as production
Using, therefore evaluation procedure terminates.
Embodiment 2
It selects benchmark mixed coal, moisture 10.5% to be defined as 1# mixed coals, then 1# mixed coals is carried out at coking
Reason, measures its shrinking percentage S1It is 7.8%, using formula S0=S1± 0.3%, so that it may to predict to intend the receipts of production application mixed coal
Shrinkage S0Reasonable value, between 7.5~8.1%；
It is 2# mixed coals that production application mixed coal is intended in definition, and it is 5.4% to measure its moisture, and carries out coking to 2# mixed coals
Processing measures the practical shrinking percentage S of 2# mixed coals2Actually 6.1%；The practical shrinking percentage S of 2# mixed coals2It is unsatisfactory for 7.5~
8.1% range, and S2Less than 7.5%, therefore the 2# mixed coals cannot be used as production application, need the receipts to 2# mixed coals
Shrinkage is adjusted；
Using scheme one：Improve the moisture of 2# mixed coals：
S3=k1×M1+b1；
S4=k2×M2+b2；
S3=8.1%, S4=7.5%, k1=k2=0.366, b1=4.096, b2=3.73；
M1Coordinate the upper limit value of moisture content of coal, M for 2#2Coordinate the lower limiting value of moisture content of coal for 2#；
By S3、k1And b1Bring formula, 8.1=0.366 × M into1+ 4.096, M is calculated1=10.94%；
By S4、k2And b2Bring formula, 7.5=0.366 × M into2+ 3.73, M is calculated2=10.30%；
Therefore the moisture of 2# mixed coals is too low in the present embodiment, but to be adjusted to 10.30~10.94% it
Between；
Embodiment 3
It selects benchmark mixed coal, moisture 10.5% to be defined as 1# mixed coals, then 1# mixed coals is carried out at coking
Reason, measures its shrinking percentage S1It is 7.8%, using formula S0=S1± 0.3%, so that it may to predict to intend the receipts of production application mixed coal
Shrinkage S0Reasonable value, between 7.5~8.1%；
It is 2# mixed coals that production application mixed coal is intended in definition, and it is 5.4% to measure its moisture, and carries out coking to 2# mixed coals
Processing measures the practical shrinking percentage S of 2# mixed coals2Actually 6.1%；The practical shrinking percentage S of 2# mixed coals2It is unsatisfactory for 7.5~
8.1% range, and S2Less than 7.5%, therefore the 2# mixed coals cannot be used as production application, need the receipts to 2# mixed coals
Shrinkage is adjusted；
Using scheme two：The upper limit value and lower limiting value of as-fired coal moisture are estimated：
SIt is low=SIt is high(1-MIt is low/MIt is high)×SIt is high, and SIt is low=S1- 0.3%=7.5%, SIt is high=S1+ 0.3%=8.1%, MIt is lowFor
The moisture of low moisture mixed coal, MIt is highFor the moisture of high-moisture mixed coal.
Therefore MIt is low/MIt is high=0.93, and value range can be between 0.90~0.96.
Therefore the range of 2# cooperations moisture content of coal needs to meet above-mentioned formula, and is contracted between 7.5~8.1% simultaneously, from
And realize the improvement to the moisture of mixed coal.
Above example is only best citing, rather than a limitation of the embodiments of the present invention.Except above-described embodiment
Outside, the present invention also has other embodiment.All technical solutions formed using equivalent substitution or equivalent transformation, all fall within the present invention
It is required that protection domain.
Claims (3)
1. a kind of control method of the degree of shrinkage of different in moisture as-fired coal, it is characterised in that：The control method includes the following steps：
1) benchmark mixed coal is selected：The moisture of the benchmark mixed coal is defined as 1# mixed coals between 10%~11%；Refining
Coke, the shrinking percentage for measuring 1# mixed coals are S1；
2) production application mixed coal is selected：It is 2# mixed coals to define the production application mixed coal, measures the 2# mixed coals
Moisture is M；And predict the shrinking percentage S of 2# mixed coals0Reasonable value：Using formula：S1- 0.3%≤S0≤S1+ 0.3%, and S0
To predict the shrinking percentage of 2# mixed coals；
3) to 2# cooperation coal coking processing：The shrinking percentage that practical coking measures 2# mixed coals is S2；
4) shrinking percentage is evaluated：If S2≥S1- 0.3% or S2Value meet S in the step 2)0Value, then 2# cooperation
Coal can be used as production application, and evaluation procedure terminates；
5) shrinking percentage of 2# mixed coals is adjusted：If S2＜ S1- 0.3%, then the 2# mixed coals not can be used as production application, evaluate
Process continues, and the Adjusted Option of 2# mixed coal shrinking percentages includes：
First, to the estimation of as-fired coal moisture：Using formula：SIt is low=SIt is high(1-MIt is low/MIt is high)×SIt is high, and SIt is low=S1- 0.3%, SIt is high
=S1+ 0.3%, MIt is lowFor the moisture of low moisture mixed coal, MIt is highFor the moisture of high-moisture mixed coal, and MIt is low/MIt is highValue can be
Fluctuation in positive and negative 0.3；
Secondly, continue the following two kinds Adjusted Option：
Scheme one：Adjust the moisture of the 2# mixed coals：
The step of 2# mixed coals adjustment moisture, is as follows：
A) upper limit value of as-fired coal moisture is calculated：Using formula：S3=k1×M1+b1, M1Coordinate the upper limit value of moisture content of coal, S for 2#3
=S1+ 0.3%, and 0 ＜ k1≤ 0.7,0 ＜ b1≤ 12, by S3、k1And b1Bring formula into：S3=k1×M1+b1In, M is calculated1；
B) lower limiting value of as-fired coal moisture is calculated：Using formula：S4=k2×M2+b2, M2Coordinate the lower limiting value of moisture content of coal, S for 2#4
=S1- 0.3%, and 0 ＜ k2≤ 0.6,0 ＜ b2≤ 10, by S4、k2And b2Bring formula into：S4=k2×M2+b2In, it is calculated
M2；
C) the moisture control reasonable value of 2# mixed coals is obtained：The moisture M of 2# mixed coals is controlled in M2~M1Between；
Scheme two：Increase degree of shrinkage X>35mm, the coking coal dosage of b≤0% make the shrinking percentage coincidence formula of 2# mixed coals：S1
0.3%≤S2≤S1+ 0.3%.
2. the control method of the degree of shrinkage of different in moisture as-fired coal according to claim 1, it is characterised in that：The benchmark
The moisture of mixed coal is between 10.3%~10.7%.
3. the control method of the degree of shrinkage of different in moisture as-fired coal according to claim 1 or 2, it is characterised in that：0 ＜ k1
≤ 0.5,0 ＜ b1≤10；0 ＜ k2≤ 0.4,0 ＜ b2≤8。
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| CN109401775B (en) * | 2018-10-18 | 2020-11-03 | 武汉钢铁有限公司 | Coke cake shrinkage control method of top-loading coke oven |
| CN110776935A (en) * | 2019-10-24 | 2020-02-11 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for reducing tamping coke pushing current |
| CN114574230A (en) * | 2022-03-24 | 2022-06-03 | 广东韶钢松山股份有限公司 | Coal blending method |
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| JPS61145288A (en) * | 1984-12-19 | 1986-07-02 | Mitsubishi Chem Ind Ltd | Manufacture of coke |
| JP3985605B2 (en) * | 2002-06-27 | 2007-10-03 | Ｊｆｅスチール株式会社 | Coke oven operation method |
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| CN101624527A (en) * | 2009-08-04 | 2010-01-13 | 武汉钢铁(集团)公司 | Coal blending method of 7.63m coke oven during starting work |
| CN102010735A (en) * | 2010-12-10 | 2011-04-13 | 武汉钢铁(集团)公司 | Coal blending method for controlling degree of shrinkage of coal as fired in large coke oven with wide coking chamber |
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