CN108264914A - The control method of coal quality stability in coking coal drying process - Google Patents

The control method of coal quality stability in coking coal drying process Download PDF

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CN108264914A
CN108264914A CN201711446745.0A CN201711446745A CN108264914A CN 108264914 A CN108264914 A CN 108264914A CN 201711446745 A CN201711446745 A CN 201711446745A CN 108264914 A CN108264914 A CN 108264914A
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coal
coal charge
drying
temperature
moisture
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CN108264914B (en
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陈细涛
薛改凤
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Wuhan Iron and Steel Co Ltd
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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
    • C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
    • C10B57/10—Drying
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N25/00—Investigating or analyzing materials by the use of thermal means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N25/00—Investigating or analyzing materials by the use of thermal means
    • G01N25/56—Investigating or analyzing materials by the use of thermal means by investigating moisture content

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  • Chemical & Material Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
  • Coke Industry (AREA)

Abstract

The invention discloses a kind of control methods of coal quality stability in coking coal drying process, belong to coal charge technical field of drying.Wet coking coal to be dried is specially taken, division takes a copy of it to dry in air, remaining be placed in presets temperature to be dried in 100~300 DEG C of baking oven into several pieces sample；Every the identical time, take out a sample and measure its coal charge quality, coal charge moisture, coal charge temperature and caking index, treat that the coal charge quality between adjacent two parts of samples remains unchanged, drying is complete, stops experiment；Compare the caking index between drying sample in drying sample in air and baking oven, obtain the controllable coal charge moisture M of coal quality stabilityctWith coal charge temperature Tct, meet following relationship：If 100 DEG C≤drying temperature≤120 DEG C, coal charge moisture Mct＞ 0, coal charge temperature Tct≤105℃；If 120 DEG C of ＜ drying temperature≤300 DEG C, coal charge moisture Mct>=0.20%, coal charge temperature Tct≤130℃.The result reliability that this method measures is strong, has directive significance for the coal charge moisture control in extensive process of coking.

Description

The control method of coal quality stability in coking coal drying process
Technical field
The present invention relates to coal quality control methods, belong to coal charge technical field of drying, are dried more particularly to a kind of coking coal The control method of coal quality stability in the process.
Background technology
Coking coal be mainly used for coke oven refine coking coal, its own generally carry 10~12% moisture, these moisture into Enter coke oven and form poisonous and hazardous coking wastewater, complex treatment process is with high costs.For cleaning for process of coking, with coal There is research boom at home for the outer drying and dehydrating research of coke oven of representative in conditioning technique etc., and coal dry heat outside stove takes off Water need to control correlative factor, and otherwise once gliding, the coke quality of generation will necessarily deteriorate coal quality.
Such as《Coal converts》The 4th phase of volume 37 in October, 2014 reports entitled microwave drying to coking coal effect on coal quality Experimental study document, the document refers to these features before and after microwave drying by choosing the characteristic indexs of different coking coals Mark carries out analysis comparison, the results showed that, microwave drying technology is while coking moisture content of coal is removed, the Industrial Analysis to coking coal It is had no significant effect with caking index, to Giseeler fluidity and Ao Ya dilations there are active influence, but unobvious, gel is influenced It is larger, particularly its process state.
Such as《Wuhan Engineering Vocational College journal》Part of in September, 2017 the 3rd phase of volume 29 discloses entitled coking coal and does The changing rule of coal temperature and moisture during dry, the document are to investigate coking coal in the drying process to the influence of coal quality, are investigated Mixed coal coal temperature and situation of change of moisture in 107~300 DEG C of drying processes, it is found that coal temperature is fast first in heating process Speed rises, and subsequently into a plateau, finally then heats up, and moisture is then exponentially downward trend, the examination complete to drying Sample does caking index, it is found that compared with as former state, coal quality does not change, this shows during heating by controlling moisture reachable Constant to guarantee coking coal coal quality.
However in actual drying production process, there is certain hysteresis effect for the control monitoring of coal charge moisture, and The stability of coal quality seriously affects the result of later stage coking.
Invention content
In order to solve the above technical problems, the invention discloses it is a kind of before extensive coking about coal quality stability control The experiment of method processed, two aspect of coal charge moisture and coal charge temperature to coking coal drying process monitor drying temperature With the relational expression between coal charge moisture, coal charge temperature.
To achieve the above object, the invention discloses a kind of control method of coal quality stability in coking coal drying process, It includes the following steps：
1) wet coking coal to be dried is taken, division takes a copy of it to dry in air into several pieces sample, remaining to put It is dried in presetting in the baking oven that temperature is 100~300 DEG C；
2) it every the identical time, takes out a sample and measures its coal charge quality, coal charge moisture, coal charge temperature and cohere finger Number, treats that the coal charge quality between adjacent two parts of samples remains unchanged, and drying is complete, stops experiment；
3) compare the caking index between drying sample in drying sample in air and baking oven, if drying sample in baking oven Caking index and air dried samples caking index between difference more than 3, if that is, coal charge continues to heat up, have Rotten trend；
Obtain the controllable coal charge moisture M of coal quality stabilityctWith coal charge temperature Tct, meet following relationship：
If 100 DEG C≤drying temperature≤120 DEG C, coal charge moisture Mct＞ 0, coal charge temperature Tct≤105℃；
If 120 DEG C of ＜ drying temperature≤300 DEG C, coal charge moisture Mct>=0.20%, coal charge temperature Tct≤130℃。
Further, the caking index of the air dried samples is 65~90, preferably 80.
Still further preferably, the wet coking coal caking index G of selection0It is 80, initial coal charge moisture M0It is 10.1%.
Still further preferably, the wet coking coal caking index G of selection0It is 80, initial coal charge moisture M0It is 10.4%.
Advantageous effect：
The coal quality stability control method of the present invention belongs to the bench-scale testing before coking, which passes through to coking Coal charge moisture in coal drying process and two aspect of coal charge temperature are set out, monitoring drying temperature and coal charge moisture, coal charge temperature it Between relational expression, meanwhile, the control method is easy to operate, at low cost, and the result reliability of measure is strong, for extensive coking Coal charge moisture control in journey has directive significance.
Specific embodiment
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
Present embodiment discloses a kind of control methods of coal quality stability in coking coal drying process, it includes following step Suddenly：
1) wet coking coal to be dried is taken, measures its caking index G0It is 80, initial coal charge moisture M0It is 10.1%；This reality The caking index of the preferably wet coking coal of example and the relevant parameter of initial coal charge moisture are applied as it appears from the above, but control method of the invention The wet coking coal arbitrarily selected is all suitable for.
2) a copy of it is taken to dry in air at least 20 parts of samples the wet coking coal division of the step 1), it is remaining Under be placed in 100 DEG C of baking oven for preset temperature and be dried；
3) it every the identical time, takes out a sample and measures its coal charge quality, coal charge moisture, coal charge temperature and cohere finger Number treats the coal charge mass conservation between adjacent two parts of samples, and drying is complete, stops experiment, has obtained table 1；
4) compare the caking index between drying sample in drying sample in air and baking oven, show that coal quality stability can The coal charge moisture M of controlctWith coal charge temperature Tct；
1 coal charge property list (one) of table
By above-mentioned table 1 it is found that when test sample is being dried to 20min, coal charge moisture has been lowered to the reduction of 0, G values It is 77, the caking index of more empty dry sample is 80, and coal quality has the tendency that rotten, and coal charge temperature at this time is 92 DEG C, you can know, Under 100 DEG C of drying temperature, coal charge moisture MctMore than 0%, coal charge temperature within 92 DEG C, coal quality is all controllable.
Embodiment 2
Present embodiment discloses a kind of control methods of coal quality stability in coking coal drying process, it includes following step Suddenly：
1) wet coking coal to be dried is taken, measures its caking index G0It is 80, initial coal charge moisture M0It is 10.1%；
2) a copy of it is taken to dry in air at least 20 parts of samples the wet coking coal division of the step 1), it is remaining Under be placed in 110 DEG C of baking oven for preset temperature and be dried；
3) it every the identical time, takes out a sample and measures its coal charge quality, coal charge moisture, coal charge temperature and cohere finger Number treats the coal charge mass conservation between adjacent two parts of samples, and drying is complete, stops experiment, has obtained table 2；
4) compare the caking index between drying sample in drying sample in air and baking oven, show that coal quality stability can The coal charge moisture M of controlctWith coal charge temperature Tct；
2 coal charge property list (two) of table
Sample Time/min Moisture/% Temperature/DEG C G values
1 0 10.1 20 80
2 1 9.9 31 80
3 2 9.7 47 80
4 3 8.8 55 79
5 4 8.0 53 81
6 5 7.5 55 80
7 6 6.0 58 81
8 7 5.2 60 79
9 8 4.4 61 80
10 9 3.8 65 81
11 10 3.3 68 80
12 11 2.6 69 81
13 12 2.2 70 80
14 13 1.9 73 81
15 14 1.5 80 79
16 15 1.0 89 80
17 16 0.4 94 81
18 17 0.0 96 80
19 18 0.0 100 78
20 19 0.0 103 77
Empty dry sample - 1.6 20 80
By above-mentioned table 2 it is found that when test sample is being dried to 19min, coal charge moisture has been lowered to the reduction of 0, G values It is 77, the caking index of more empty dry sample is 80, and coal quality has the tendency that rotten, and coal charge temperature at this time is 103 DEG C, you can know, Under 110 DEG C of drying temperature, coal charge moisture MctMore than 0%, coal charge temperature within 103 DEG C, coal quality is all controllable.
Embodiment 3
Present embodiment discloses a kind of control methods of coal quality stability in coking coal drying process, it includes following step Suddenly：
1) wet coking coal to be dried is taken, measures its caking index G0It is 80, initial coal charge moisture M0It is 10.1%；
2) a copy of it is taken to dry in air at least 20 parts of samples the wet coking coal division of the step 1), it is remaining Under be placed in 120 DEG C of baking oven for preset temperature and be dried；
3) it every the identical time, takes out a sample and measures its coal charge quality, coal charge moisture, coal charge temperature and cohere finger Number treats the coal charge mass conservation between adjacent two parts of samples, and drying is complete, stops experiment, has obtained table 3；
4) compare the caking index between drying sample in drying sample in air and baking oven, show that coal quality stability can The coal charge moisture M of controlctWith coal charge temperature Tct；
3 coal charge property list (three) of table
Sample Time/min Moisture/% Temperature/DEG C G values
1 0 10.1 20 80
2 1 9.8 20 80
3 2 9.4 32 80
4 3 8.5 46 80
5 4 7.6 53 81
6 5 6.8 59 81
7 6 5.4 60 79
8 7 4.2 59 79
9 8 2.9 61 80
10 9 1.6 61 80
11 10 1.1 62 81
12 11 0.8 70 80
13 12 0.6 75 80
14 13 0.3 80 79
15 14 0.2 86 78
16 15 0.1 88 78
17 16 0 93 78
18 17 0 105 76
19 18 - - -
20 19 - - -
Empty dry sample - 1.6 20 80
By above-mentioned table 3 it is found that when test sample is being dried to 17min, coal charge moisture has been lowered to the reduction of 0, G values It is 76, the caking index of more empty dry sample is 80, and coal quality has the tendency that rotten, and coal charge temperature at this time is 105 DEG C, you can know, Under 120 DEG C of drying temperature, coal charge moisture MctMore than 0%, coal charge temperature within 105 DEG C, coal quality is all controllable.
Embodiment 4
Present embodiment discloses a kind of control methods of coal quality stability in coking coal drying process, it includes following step Suddenly：
1) wet coking coal to be dried is taken, measures its caking index G0It is 80, initial coal charge moisture M0It is 10.4%；This reality The caking index of the preferably wet coking coal of example and the relevant parameter of initial coal charge moisture are applied as it appears from the above, but control method of the invention The wet coking coal arbitrarily selected is all suitable for.
2) a copy of it is taken to dry in air at least 20 parts of samples the wet coking coal division of the step 1), it is remaining Under be placed in 150 DEG C of baking oven for preset temperature and be dried；
3) it every the identical time, takes out a sample and measures its coal charge quality, coal charge moisture, coal charge temperature and cohere finger Number treats the coal charge mass conservation between adjacent two parts of samples, and drying is complete, stops experiment, has obtained table 4；
4) compare the caking index between drying sample in drying sample in air and baking oven, show that coal quality stability can The coal charge moisture M of controlctWith coal charge temperature Tct；
4 coal charge property list (four) of table
By above-mentioned table 4 it is found that when test sample is being dried to 13min, coal charge moisture has been lowered to 0.2, G values drop Low is 77, and the caking index of more empty dry sample is 80, and coal quality has the tendency that rotten, and coal charge temperature at this time is 93 DEG C, you can know, Under 150 DEG C of drying temperature, coal charge moisture MctMore than 0.2%, coal charge temperature within 93 DEG C, coal quality is all controllable.
Embodiment 5
Present embodiment discloses a kind of control methods of coal quality stability in coking coal drying process, it includes following step Suddenly：
1) wet coking coal to be dried is taken, measures its caking index G0It is 80, initial coal charge moisture M0It is 10.4%；
2) a copy of it is taken to dry in air at least 20 parts of samples the wet coking coal division of the step 1), it is remaining Under be placed in 180 DEG C of baking oven for preset temperature and be dried；
3) it every the identical time, takes out a sample and measures its coal charge quality, coal charge moisture, coal charge temperature and cohere finger Number treats the coal charge mass conservation between adjacent two parts of samples, and drying is complete, stops experiment, has obtained table 5；
4) compare the caking index between drying sample in drying sample in air and baking oven, show that coal quality stability can The coal charge moisture M of controlctWith coal charge temperature Tct；
5 coal charge property list (four) of table
By above-mentioned table 5 it is found that when test sample is being dried to 11min, coal charge moisture has been lowered to 0.2, G values drop Low is 77, and the caking index of more empty dry sample is 80, and coal quality has the tendency that rotten, and coal charge temperature at this time is 101 DEG C, you can know, Under 180 DEG C of drying temperature, coal charge moisture MctMore than 0.2%, coal charge temperature within 101 DEG C, coal quality is all controllable.
Embodiment 6
Present embodiment discloses a kind of control methods of coal quality stability in coking coal drying process, it includes following step Suddenly：
1) wet coking coal to be dried is taken, measures its caking index G0It is 80, initial coal charge moisture M0It is 10.4%；
2) a copy of it is taken to dry in air at least 20 parts of samples the wet coking coal division of the step 1), it is remaining Under be placed in 200 DEG C of baking oven for preset temperature and be dried；
3) it every the identical time, takes out a sample and measures its coal charge quality, coal charge moisture, coal charge temperature and cohere finger Number treats the coal charge mass conservation between adjacent two parts of samples, and drying is complete, stops experiment, has obtained table 6；
4) compare the caking index between drying sample in drying sample in air and baking oven, show that coal quality stability can The coal charge moisture M of controlctWith coal charge temperature Tct；
6 coal charge property list (six) of table
By above-mentioned table 6 it is found that when test sample is being dried to 9min, coal charge moisture has been lowered to 0.2, G values drop Low is 77, and the caking index of more empty dry sample is 80, and coal quality has the tendency that rotten, and coal charge temperature at this time is 112 DEG C, you can know, Under 200 DEG C of drying temperature, coal charge moisture MctMore than 0.2%, coal charge temperature within 112 DEG C, coal quality is all controllable.
Embodiment 7
Present embodiment discloses a kind of control methods of coal quality stability in coking coal drying process, it includes following step Suddenly：
1) wet coking coal to be dried is taken, measures its caking index G0It is 80, initial coal charge moisture M0It is 10.4%；
2) a copy of it is taken to dry in air at least 20 parts of samples the wet coking coal division of the step 1), it is remaining Under be placed in 220 DEG C of baking oven for preset temperature and be dried；
3) it every the identical time, takes out a sample and measures its coal charge quality, coal charge moisture, coal charge temperature and cohere finger Number treats the coal charge mass conservation between adjacent two parts of samples, and drying is complete, stops experiment, has obtained table 7；
4) compare the caking index between drying sample in drying sample in air and baking oven, show that coal quality stability can The coal charge moisture M of controlctWith coal charge temperature Tct；
7 coal charge property list (seven) of table
By above-mentioned table 7 it is found that when test sample is being dried to 7min, coal charge moisture has been lowered to 0.2, G values drop Low is 77, and the caking index of more empty dry sample is 80, and coal quality has the tendency that rotten, and coal charge temperature at this time is 117 DEG C, you can know, Under 220 DEG C of drying temperature, coal charge moisture MctMore than 0.2%, coal charge temperature within 117 DEG C, coal quality is all controllable.
Embodiment 8
Present embodiment discloses a kind of control methods of coal quality stability in coking coal drying process, it includes following step Suddenly：
1) wet coking coal to be dried is taken, measures its caking index G0It is 80, initial coal charge moisture M0It is 10.4%；
2) a copy of it is taken to dry in air at least 20 parts of samples the wet coking coal division of the step 1), it is remaining Under be placed in 300 DEG C of baking oven for preset temperature and be dried；
3) it every the identical time, takes out a sample and measures its coal charge quality, coal charge moisture, coal charge temperature and cohere finger Number treats the coal charge mass conservation between adjacent two parts of samples, and drying is complete, stops experiment, has obtained table 8；
4) compare the caking index between drying sample in drying sample in air and baking oven, show that coal quality stability can The coal charge moisture M of controlctWith coal charge temperature Tct；
8 coal charge property list (8) of table
By above-mentioned table 8 it is found that when test sample has been lowered to 0.2, G values being dried to 3.5min, coal charge moisture It is reduced to 77, the caking index of more empty dry sample is 80, and coal quality has the tendency that rotten, and coal charge temperature at this time is 130 DEG C, you can Know, under 300 DEG C of drying temperature, coal charge moisture MctMore than 0.2%, coal charge temperature within 130 DEG C, coal quality is all controllable 's.
If by above-described embodiment it is found that 100 DEG C≤drying temperature≤120 DEG C, coal charge moisture Mct＞ 0, coal charge temperature Tct ≤105℃；
If 120 DEG C of ＜ drying temperature≤300 DEG C, coal charge moisture Mct>=0.20%, coal charge temperature Tct≤130℃。
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 (2)

1. a kind of control method of coal quality stability in coking coal drying process, it is characterised in that：It includes the following steps：
1) take wet coking coal to be dried, division takes a copy of it to dry in air into several pieces sample, it is remaining be placed in it is pre- First set temperature is to be dried in 100~300 DEG C of baking oven；
2) every the identical time, a sample of taking-up measures its coal charge quality, coal charge moisture, coal charge temperature and caking index, Treat that the coal charge quality between adjacent two parts of samples remains unchanged, drying is complete, stops experiment；
3) compare the caking index between drying sample in drying sample in air and baking oven, show that coal quality stability is controllable Coal charge moisture MctWith coal charge temperature Tct, meet following relationship：
If 100 DEG C≤drying temperature≤120 DEG C, coal charge moisture Mct＞ 0, coal charge temperature Tct≤105℃；
If 120 DEG C of ＜ drying temperature≤300 DEG C, coal charge moisture Mct>=0.20%, coal charge temperature Tct≤130℃。
2. according to claim 1 in coking coal drying process coal quality stability control method, it is characterised in that：The sky The caking index of drying sample is 65~90 in gas.
CN201711446745.0A 2017-12-27 2017-12-27 Method for controlling coal quality stability in coking coal drying process Active CN108264914B (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020051084A (en) * 2000-12-22 2002-06-28 이구택 Coke strength prediction method from coal charging and coking condition
CN103760105A (en) * 2014-01-22 2014-04-30 安徽工业大学 Measuring method of coal bonding characteristic index under tamping condition
CN105842272A (en) * 2016-05-30 2016-08-10 武汉钢铁股份有限公司 Coking coal critical temperature test method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020051084A (en) * 2000-12-22 2002-06-28 이구택 Coke strength prediction method from coal charging and coking condition
CN103760105A (en) * 2014-01-22 2014-04-30 安徽工业大学 Measuring method of coal bonding characteristic index under tamping condition
CN105842272A (en) * 2016-05-30 2016-08-10 武汉钢铁股份有限公司 Coking coal critical temperature test method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
陈细涛等: "《炼焦煤干燥过程中煤温与水分的变化规律》", 《武汉工程职业技术学院学报》 *

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