CN105567270A - Coal blending coke making method capable of controlling shrinkage degree of as-fired coal - Google Patents
Coal blending coke making method capable of controlling shrinkage degree of as-fired coal Download PDFInfo
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- CN105567270A CN105567270A CN201510943379.4A CN201510943379A CN105567270A CN 105567270 A CN105567270 A CN 105567270A CN 201510943379 A CN201510943379 A CN 201510943379A CN 105567270 A CN105567270 A CN 105567270A
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- 239000003245 coal Substances 0.000 title claims abstract description 225
- 239000000571 coke Substances 0.000 title claims abstract description 78
- 238000002156 mixing Methods 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000004939 coking Methods 0.000 claims abstract description 98
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 claims abstract description 14
- 230000001276 controlling effect Effects 0.000 claims abstract description 10
- 230000001105 regulatory effect Effects 0.000 claims abstract description 10
- 230000008602 contraction Effects 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 4
- 230000035800 maturation Effects 0.000 claims description 4
- 239000000203 mixture Substances 0.000 abstract 3
- 239000002245 particle Substances 0.000 abstract 1
- 238000010298 pulverizing process Methods 0.000 abstract 1
- 230000008569 process Effects 0.000 description 5
- 238000009997 thermal pre-treatment Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 2
- 230000008520 organization Effects 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 1
- 239000011335 coal coke Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
Classifications
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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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- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Coke Industry (AREA)
Abstract
The invention discloses a coal blending coke making method capable of controlling shrinkage degree of as-fired coal, which comprises the following steps: 1) determining the reference shrinkage of as-fired coal; 2) detecting shrinkage degree x value of each single type of coking coal for production, and determining the adjustable blend coal shrinkage degree coal type; 3) changing the proportion of adjustable blend coal shrinkage degree coal type, and setting different coal blending schemes; 4) pulverizing each single type of coking coal, controlling the particle size at 3mm, and carrying out coal blending according to the set coal blending scheme; 5) regulating the water content and coal filling height; 6) putting the blend coal sample in a cokery, and carrying out coking; 7) taking out the lump coke, and calculating the shrinkage; and if the shrinkage of the obtained lump coke is less than the reference shrinkage of the as-fired coal, judging that the coal blending scheme does not satisfy the requirement, or else, judging that the coal blending scheme does not satisfy the coal blending coke making requirement. The shrinkage degree of the as-fired coal and the properties of the single type of coking coal are combined to reasonably determine the proportion of the maximum-shrinkage-degree coking coal, thereby optimizing the shrinkage of the coke button, implementing smooth coking production and ensuring the coke quality.
Description
Technical field
The invention belongs to metallurgical coal-blending coking technical field, be specifically related to a kind of coal-blending coking method controlling as-fired coal shrink grading.
Background technology
As-fired coal reduces after below moisture to 3% through thermal pretreatment technique, and the bulk density of as-fired coal increases substantially, and increases by more than 15%, reaches as high as more than 30%, and coke shrinkage is declined obviously.Meanwhile, due to the existence of moulded coal, process of coalingging easily produces segregation, and the contraction of coking chamber different sites there are differences.If do not take regulating measures, coke pushing difficulty will be caused, have a strong impact on that coke oven is normally produced, safety and longevity.And coke pushing is the essential condition that coke oven is normally produced smoothly, be also coke oven safety and long-lived key influence factor.For ensureing that coke oven coke-pusher is smooth, the blending method of rational as-fired coal shrink grading and science must be controlled.The increase of coke furnace carbonization chamber width, the suitable prolongation of coking time in coking process, the reduction of bulk density etc. are all conducive to the increase of coke shrinkage, promote that coking production coke pushing is smooth.But coke oven is once be constructed and put into operation, above influence factor is just fixing maybe can only finely tune, and affects not obvious, and Blending adjustment very flexibly and its adjusting range is wider, therefore, adjust Blending to be optimization as-fired coal shrink grading, to ensure the prefered method that charge of coke is released smoothly.
It is generally acknowledged, high convergency degree coking coal allocate the increase being conducive to coke shrinkage degree into, but contriver finds in production practice, and excessive allocates high convergency degree coking coal into, and coke shrinkage can be caused excessive thus seriously cracked, causes coke pushing difficulty too; Meanwhile, due to high convergency coking coal ature of coal deviation, excessive allocating into also can cause coke quality deterioration.Traditional charred coal organization structure and the relation of coke quality quality, in the wet coal coking of top dress, there is stronger directive function, but when coking coal is after thermal pretreatment, its rule there occurs significant change, continue to utilize the relation of traditional charred coal organization structure and coke quality quality to instruct coal-blending coking, the effect usually run in the opposite direction, therefore, needs the coal-blending coking method set up and adapt with thermal pretreatment coking coal coke making process badly.
Summary of the invention:
Technical problem to be solved by this invention is to provide a kind of coal-blending coking method controlling as-fired coal shrink grading, thinks carrying out smoothly of thermal pretreatment coking coal coking smooth operation aborning and coke pushing, provides prerequisite, the coke finally refining up-to-standard.
For solving the problems of the technologies described above, technical scheme provided by the invention comprises the steps:
1) the reference search rate of as-fired coal is determined.
2) detect the shrink grading x value of producing with each single coking coal, single coking coal maximum for shrink grading x value is defined as regulate mixed coal shrink grading coal, for later stage coke shrinkage adjustment is prepared.
3) change the proportioning regulating mixed coal shrink grading coal, different Coal Blending Schemes is set, and require in often kind of mixed coal: V
dafthe weight proportion <55% of >35% coking coal, weight proportion>=30% of coarse grain pattern structure ratio >62% coking coal, weight proportion>=8% of thickness of colloidal matter layer >28mm rich coal, regulates weight proportion≤55% of mixed coal shrink grading coal.
4) pulverized by each single coking coal, Task-size Controlling is 3mm (namely the mass percent of granularity <3mm is 80 ± 5%), carries out coal blending by the Coal Blending Schemes arranged.
5) moisture and bulk density is regulated, control mixed coal actual water and the full water of target (this mixed coal intends the full water required by producting rule that need observe) error entirely within 1%, to avoid moisture on the impact of experimental result, adjustment mixed coal is coaling and is highly coaling highly consistent with production.
6) the cooperation coal sample that the mixed coal scheme of setting obtains is placed in small coke oven coking, to 950 ~ 1050 DEG C of charge of coke maturations, control actual temperature and target call temperature error are at ± 1 DEG C.
7) take out coke button, measure gained coke button width, shrinkage from mold dimensions, if the shrinking percentage of gained coke button is less than the reference search rate of as-fired coal, then this Coal Blending Schemes does not meet the demands; If the shrinking percentage of gained coke button is more than or equal to the reference search rate of as-fired coal, then this Coal Blending Schemes meets coal-blending coking requirement.
Further, the defining method of the reference search rate of described as-fired coal is one of following three kinds: a, with coke oven normal contraction data of producing in early stage for reference search rate; Coke oven as-fired coal sample is got directly as benchmark coal sample, by step 5 in b, production scene) ~ 7) carry out small coke oven coking and measure gained coke button shrinking percentage as reference search rate; C, carry out test coal blending according to producting proportion, by step 4) ~ 7) carry out small coke oven coking and measure gained coke button shrinking percentage as reference search rate, wherein step 5) in the full water of target refer to the full water of target of this benchmark coal sample coal-blending coking defined.
Further, in the different Coal Blending Schemes of setting, V
dafthe weight proportion of >35% coking coal is 30 ~ 48%, the weight proportion of coarse grain pattern structure ratio >62% coking coal is 32 ~ 45%, and the weight proportion of thickness of colloidal matter layer >28mm rich coal is 10 ~ 17%.
Further, described adjustment mixed coal shrink grading coal is shrink grading at the bottle coal of more than 40mm or 1/3 coking coal.
Further, the weight proportion of described bottle coal is 43 ~ 50%.
Further, the weight proportion of described 1/3 coking coal is 30 ~ 48%.
The present invention utilizes the notable difference of different coking coal shrink grading and single grade coal coordinating the roughly additivity in coking; combined by the performance controlling as-fired coal shrink grading and control single coking coal; rationally determine the allocation ratio of maximum contraction coking coal; optimize coke shrinkage; produce for the coking of thermal pretreatment coking coal New Cokemaking Processes and provide a kind of science, feasible contraction control method; ensure that the available protecting with furnace wall is carried out in coke pushing smoothly, for novel process provides prerequisite in large smooth application of producing.Carry out shrink grading control according to the present invention program, not only can realize carrying out smoothly of coking production, ensure coke quality, can also ensure that the stable of coking furnace shaft and longevity operate.
Embodiment
Below in conjunction with embodiment, the present invention is further detailed explanation.
1) the reference search rate of as-fired coal is determined.A, with coke oven normal production contraction data in early stage for reference search rate; Coke oven as-fired coal sample is got directly as benchmark coal sample in b, production scene, and according to the following steps 5) ~ 7) carry out small coke oven coking and measure gained coke button shrinking percentage as reference search rate; C, carry out test coal blending according to producting proportion and obtain benchmark coal sample, by step 4) ~ 7) carry out small coke oven coking and measure gained coke button shrinking percentage as reference search rate, wherein step 5) in the full water of target refer to the full water of target of this benchmark coal sample coal-blending coking defined.In newly-built coke oven situation, then with identical or close coke oven for benchmark, obtain benchmark coal sample according to above-mentioned three kinds of methods.
2) detect the shrink grading x value of producing with each single coking coal, single coking coal maximum for shrink grading x value is defined as regulate mixed coal shrink grading coal, for later stage coke shrinkage adjustment is prepared.
3) change the proportioning regulating mixed coal shrink grading coal, different Coal Blending Schemes is set, and require in often kind of mixed coal: V
dafthe weight proportion <55% of >35% coking coal, weight proportion>=30% of coarse grain pattern structure ratio >62% coking coal, the weight proportion >8% of thickness of colloidal matter layer >28mm rich coal, regulates weight proportion≤55% of mixed coal shrink grading coal.
4) pulverized by each single coking coal, Task-size Controlling is 3mm (namely the mass percent of granularity <3mm is 80 ± 5%), carries out coal blending by the Coal Blending Schemes arranged.
5) moisture and bulk density is regulated, control the actual full water of mixed coal and the full water of target (namely this mixed coal intends the full water required by producting rule that need observe) error within 1%, to avoid moisture on the impact of experimental result, adjustment mixed coal is coaling and is highly coaling highly consistent with production.
6) the cooperation coal sample that the mixed coal scheme of setting obtains is placed in small coke oven coking, to 950 ~ 1050 DEG C of charge of coke maturations, control actual temperature and target call temperature error are at ± 1 DEG C.
7) take out coke button, measure gained coke button width, shrinkage from mold dimensions, if the shrinking percentage of gained coke button is less than the reference search rate of as-fired coal, then this Coal Blending Schemes does not meet the demands; If the shrinking percentage of gained coke button is more than or equal to the reference search rate of as-fired coal, then this Coal Blending Schemes meets coal-blending coking requirement.
Embodiment 1
1) coking production scene is got and is coordinated coal sample as benchmark coal sample, regulates moisture to 11 ± 0.5%, and will regulate the coal sample shove charge coking after moisture, control bulk density is 0.73g/cm
3, coking temperature is 980 ± 1 DEG C, obtains coke shrinkage rate, in table 1 after coking.
2) detecting the shrink grading x value of producing with each single coking coal, according to the shrink grading data in following table, determining that 4# coking coal is for regulating mixed coal shrink grading.
The shrink grading of the different coking coal of table 1
3) set up different Blendings, the scope 18% ~ 55% changes the proportioning of 4# coking coal, arranges Coal Blending Schemes 1 ~ 4, is suitable for what find out 4# coking coal the amount of allocating into.Require in often kind of mixed coal: V
dafthe weight proportion <55% of >35% coking coal, weight proportion>=30% of coarse grain pattern structure ratio >62% coking coal, weight proportion>=8% of thickness of colloidal matter layer >28mm rich coal.Each Coal Blending Schemes is in table 2:
The Coal Blending Schemes 1 ~ 4 of table 2 benchmark coal sample Coal Blending Schemes, setting and as-fired coal shrinking percentage thereof
4) pulverized by each single coking coal, Task-size Controlling is 3mm (namely the mass percent of granularity <3mm is 80 ± 5%), carries out coal blending respectively by the Coal Blending Schemes 1 ~ 4 arranged in table 2.
5) moisture and bulk density is regulated, control mixed coal actual water and the full water error of target entirely within 1%, to avoid moisture on the impact of experimental result, the height of coalingging of adjustment mixed coal coalings highly consistent (height of coalingging namely controlling mixed coal differs within 1% with the numerical value producing height of coalingging) with production.
6) the cooperation coal sample that scheme 1 ~ 4 obtains is placed in small coke oven coking, to 980 ± 1 DEG C of charge of coke maturations.
7) taking-up coke button, measures the cooperation coal sample gained coke button width of scheme 1 ~ 4, shrinkage from mold dimensions, each coke button shrinking percentage is plotted on figure or is listed in table compare.Generally, data are plotted on figure relatively more directly perceived, and list in table, then fairly simple.For easy meter, in the present embodiment, the shrinking percentage of each coke button is listed in table 3.As can be seen from Table 3, for ensureing the shrinking percentage of the shrinking percentage >=benchmark coal sample of the cooperation coal sample gained coke button that the mixed coal scheme arranged obtains, the dosage of 4# coking coal must be as far as possible higher, and scheme 1 and 2 meets coal blending requirement.
Embodiment 2
As can be seen from Table 1, if get rid of coking coal 4# in Coal Blending Schemes, then the shrink grading of coking coal 5# is maximum, then coking coal 5# will be confirmed as regulating mixed coal shrink grading coal.Step 3 according to embodiment 1) ~ 7) Coal Blending Schemes 5 ~ 7 is set, and obtain the as-fired coal shrinking percentage of Coal Blending Schemes 5 ~ 7, Coal Blending Schemes 5 ~ 7 and the as-fired coal shrinking percentage that obtains thereof are in table 3
The Coal Blending Schemes 5 ~ 7 of table 3 benchmark coal sample Coal Blending Schemes, setting and as-fired coal shrinking percentage thereof
Although what deserves to be explained is that the benchmark coal sample in the embodiment of the present invention all uses the coking coal of coarse grain pattern structure ratio >62% and the rich coal of thickness of colloidal matter layer >28mm, this is main because these two kinds of single grade coal are conventional coals of general coking factory, even if the benchmark coal sample of producing does not use above-mentioned two kinds of coals, as long as the shrinking percentage measuring benchmark coal sample and mixed coal (the i.e. V arranged by the inventive method
dafthe weight proportion <55% of >35% coking coal, weight proportion>=30% of coarse grain pattern structure ratio >62% coking coal, weight proportion>=8% of thickness of colloidal matter layer >28mm rich coal, other coking coal is without the need to concrete restriction) shrinking percentage of coal sample, can compare and obtain suitable Coal Blending Schemes.
Claims (6)
1. control a coal-blending coking method for as-fired coal shrink grading, it is characterized in that: the method comprises the following steps:
1) the reference search rate of as-fired coal is determined;
2) detect the shrink grading x value of producing with each single coking coal, single coking coal maximum for shrink grading x value is defined as regulate mixed coal shrink grading coal;
3) change the proportioning regulating mixed coal shrink grading coal, different Coal Blending Schemes is set, and require in often kind of mixed coal: V
dafthe weight proportion <55% of >35% coking coal, weight proportion>=30% of coarse grain pattern structure ratio >62% coking coal, weight proportion>=8% of thickness of colloidal matter layer >28mm rich coal, regulates weight proportion≤55% of mixed coal shrink grading coal;
4) pulverized by each single coking coal, Task-size Controlling is 3mm, carries out coal blending by the Coal Blending Schemes arranged;
5) regulate moisture and bulk density, control mixed coal actual water and the full water error of target entirely within 1%, the height of coalingging of adjustment mixed coal is coaling highly consistent with production;
6) the cooperation coal sample that the mixed coal scheme of setting obtains is placed in small coke oven coking, to 950 ~ 1050 DEG C of charge of coke maturations, control actual temperature and target call temperature error are at ± 1 DEG C;
7) take out coke button, measure gained coke button width, shrinkage from mold dimensions, if the shrinking percentage of gained coke button is less than the reference search rate of as-fired coal, then this Coal Blending Schemes does not meet the demands; If the shrinking percentage of gained coke button is more than or equal to the reference search rate of as-fired coal, then this Coal Blending Schemes meets coal-blending coking requirement.
2. the coal-blending coking method of control as-fired coal shrink grading according to claim 1, is characterized in that:
The defining method of the reference search rate of described as-fired coal is one of following three kinds: a, with coke oven normal contraction data of producing in early stage for reference search rate; Coke oven as-fired coal sample is got directly as benchmark coal sample, by step 5 in b, production scene) ~ 7) carry out small coke oven coking and measure gained coke button shrinking percentage as reference search rate; C, carry out test coal blending according to producting proportion, by step 4) ~ 7) carry out small coke oven coking and measure gained coke button shrinking percentage as reference search rate, wherein step 5) in the full water of target refer to the full water of target of this benchmark coal sample coal-blending coking defined.
3. the coal-blending coking method of control as-fired coal shrink grading according to claim 1 and 2, is characterized in that:
Described step 3) in the different Coal Blending Schemes that arrange, V
dafthe weight proportion of >35% coking coal is 30 ~ 48%, the weight proportion of coarse grain pattern structure ratio >62% coking coal is 32 ~ 45%, and the weight proportion of thickness of colloidal matter layer >28mm rich coal is 10 ~ 17%.
4. the coal-blending coking method of control as-fired coal shrink grading according to claim 1 and 2, is characterized in that:
Described adjustment mixed coal shrink grading coal is shrink grading at the bottle coal of more than 40mm or 1/3 coking coal.
5. the coal-blending coking method of control as-fired coal shrink grading according to claim 4, is characterized in that:
The weight proportion of described bottle coal is 43 ~ 50%.
6. the coal-blending coking method of control as-fired coal shrink grading according to claim 4, is characterized in that:
The weight proportion of described 1/3 coking coal is 30 ~ 48%.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109401775A (en) * | 2018-10-18 | 2019-03-01 | 武汉钢铁有限公司 | The coke shrinkage control method of top dress coke oven |
| CN109447434A (en) * | 2018-10-16 | 2019-03-08 | 武汉钢铁有限公司 | The furnace granularity that enters of coking coal determines method and the application in coking coal preparation technique |
| 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 |
| CN111693558A (en) * | 2019-03-11 | 2020-09-22 | 上海梅山钢铁股份有限公司 | Method for detecting semicoke shrinkage rate in coking process |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109447434A (en) * | 2018-10-16 | 2019-03-08 | 武汉钢铁有限公司 | The furnace granularity that enters of coking coal determines method and the application in coking coal preparation technique |
| CN109447434B (en) * | 2018-10-16 | 2022-03-15 | 武汉钢铁有限公司 | Method for determining charging granularity of coking coal and application of method in coking coal preparation process |
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| CN111693558A (en) * | 2019-03-11 | 2020-09-22 | 上海梅山钢铁股份有限公司 | Method for detecting semicoke shrinkage rate in coking process |
| 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 |
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Granted publication date: 20180320 |