CN110713842A - Tamping coking resistance control method - Google Patents
Tamping coking resistance control method Download PDFInfo
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- CN110713842A CN110713842A CN201910887424.7A CN201910887424A CN110713842A CN 110713842 A CN110713842 A CN 110713842A CN 201910887424 A CN201910887424 A CN 201910887424A CN 110713842 A CN110713842 A CN 110713842A
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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
- C10B45/00—Other details
- C10B45/02—Devices for producing compact unified coal charges outside the oven
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Abstract
The invention relates to the field of coking, and discloses a control method of tamping coking resistance. The method comprises the following steps: (1) measuring the maximum expansion pressure of single coal for tamping coking; (2) and adjusting the structure of the coal blending for tamping coking according to the measurement result. The method detects the maximum expansion pressure of the single coal for tamping coking, and reduces the expansion pressure of the coal blending by reasonably adjusting the structure of the coal blending according to the detection result, thereby reducing the resistance of the tamping coking, further reducing the pressure on the furnace wall in the tamping coking process, and prolonging the service life of the tamping coking furnace.
Description
Technical Field
The invention relates to the field of coking, in particular to a control method of tamping coking resistance.
Background
In the process of tamping coking, the bulk density of the coal material can be 0.75t/m of that of the bulk coal after tamping3The left and right are improved to 1.10 to 1.15t/m3The dry distillation gas generated in the process of coking the tamped coal is not easy to separate out, the expansion pressure of the coal particles is increased, and the expansion pressure of the tamping coke oven is 6-8 times of that of the top-loading coke oven, so that the tamping coke oven has larger pressure on the oven wall in the coking process, and the coke pushing resistance of the tamping coke oven is far higher than that of the top-loading coke oven. The tamping coke pushing resistance is high, which can cause serious damage to the oven body, thereby shortening the service life of the tamping coke oven.
Disclosure of Invention
The invention aims to solve the problems of high tamping coking resistance, furnace body damage and coke oven service life shortening in the prior art, and provides a control method of the tamping coking resistance.
In order to achieve the above object, the present invention provides a method for controlling tamping coking resistance, comprising the steps of:
(1) measuring the maximum expansion pressure of single coal for tamping coking;
(2) and adjusting the structure of the coal blending for tamping coking according to the measurement result.
Preferably, the adjusting of the structure of the coal blending for stamp-charging coking refers to reducing the expansion pressure of the coal blending by adjusting the structure of the coal blending.
Preferably, the method for reducing the expansion pressure of the coal blending by adjusting the structure of the coal blending comprises the step of replacing high-expansion coal with low-expansion coal in the same coal type under the condition of keeping the caking property range unchanged according to the coke quality requirement.
Preferably, the bonding range is unchanged, which means that the bonding index is controlled to be in the range of 75-85.
Preferably, the method for reducing the expansion pressure of the blended coal by adjusting the structure of the blended coal comprises the step of replacing the main coking coal with high expansibility with 1/3 coking coal with low expansibility when the main coking coal is blended at 40 wt% or more.
Preferably, the method for reducing the expansion pressure of the blended coal by adjusting the structure of the blended coal comprises the step of replacing part of 1/3 coking coal with gas coal with lower expansibility.
Preferably, in the step (1), before the measuring the maximum expansion pressure of the single coal for stamp-charging coking, the method further comprises classifying the single coal for stamp-charging coking according to a bituminous coal classification method.
Preferably, the single coal for stamp-charging coking includes gas coal, fat coal, coking coal, 1/3 coking coal and lean coal.
Preferably, in the step (1), the measurement of the maximum expansion pressure is performed by using a coal expansion determination device.
In the method for controlling the tamping coking resistance, the maximum expansion pressure of single coal for tamping coking is detected, and the expansion pressure of the coal is reduced by reasonably adjusting the structure of the coal blending according to the detection result, so that the resistance of tamping coking is reduced.
Detailed Description
The following describes in detail specific embodiments of the present invention. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
The invention provides a control method of tamping coking resistance, which comprises the following steps:
(1) measuring the maximum expansion pressure of single coal for tamping coking;
(2) and adjusting the structure of the coal blending for tamping coking according to the measurement result.
Preferably, the adjustment of the structure of the coal blending for stamp-charging coking means that the expansion pressure of the coal blending is reduced by adjusting the structure of the coal blending. The maximum expansion pressure of each kind of single coal for tamping coking is different, the expansion pressure of the blended coal is different due to different coal blending schemes, and the expansion pressure of the blended coal can be reduced by reasonably optimizing the coal blending structure, so that the coke pushing resistance is reduced.
Preferably, the method for reducing the expansion pressure of the coal blending by adjusting the structure of the coal blending comprises the step of replacing high-expansion coal with low-expansion coal in the same coal type under the condition of keeping the caking property range unchanged according to the coke quality requirement. As the quality of the coal as fired is determined by the structure of the coal blending, if the caking index of the coal as fired is lower, coke cannot be formed, and the coke pushing is difficult.
In the method of the present invention, the case where the adhesion range is constant means that the adhesion index is controlled to be in the range of 75 to 85.
Preferably, the method for reducing the expansion pressure of the blended coal by adjusting the structure of the blended coal further comprises replacing the main coking coal with high expansibility with 1/3 coking coal with low expansibility when the main coking coal is blended at 40 wt% or more.
Preferably, the method for reducing the expansion pressure of the blended coal by adjusting the structure of the blended coal further comprises replacing part of the 1/3 coking coal with the gas coal with lower expansibility.
Preferably, in the step (1), before the measuring the maximum expansion pressure of the single coal for stamp-charging coking, the method further comprises classifying the single coal for stamp-charging coking according to a bituminous coal classification method.
In the method, the bituminous coal classification can be carried out according to the national standard GB5751-86 for Chinese coal classification.
In a preferred aspect, the single coal for stamp-charging coking includes gas coal, fat coal, coking coal, 1/3 coking coal and lean coal.
Preferably, in the step (1), the maximum expansion pressure is measured by using a coal expansion measuring device. In the method of the present invention, there is no particular requirement for the selection of the coal expandability measuring apparatus, and it may be a routine choice in the art. In a specific embodiment, the measurement is performed using a briquette swelling pressure meter.
In the method, the level of the coke pushing resistance is represented by the magnitude of the coke pushing current, and the magnitude of the coke pushing resistance is in positive correlation with the magnitude of the coke pushing current.
In one specific embodiment, the method for controlling tamping coking resistance comprises the following steps:
(1) according to the national Standard for Chinese coal Classification GB5751-86, coal for tamping coking is divided into gas coal, fat coal, coking coal, 1/3 coking coal and lean coal;
(2) measuring the maximum expansion pressure of the single coal for tamping in the step (1) by utilizing a tamping briquette expansion pressure measuring instrument;
(3) and adjusting the coal blending structure according to the measurement result of the maximum expansion pressure of the single coal for the tamping coking.
The method for controlling the tamping coking resistance detects the maximum expansion pressure of single coal for tamping coking, and reduces the expansion pressure of coal blending by reasonably adjusting the structure of the coal blending according to the detection result, thereby reducing the resistance of tamping coking, further reducing the pressure on a furnace wall in the tamping coking process, and prolonging the service life of the tamping coking furnace.
The present invention will be described in detail below by way of examples, but the scope of the present invention is not limited thereto.
The expansion pressure is measured by a tamping briquette expansion pressure measuring instrument, and the manufacturer is Anshan Kexiang, and the model is ADY-2006A.
Reference example
The benchmark example is the conventional coal blending scheme at present, and the coal blending structure is shown in table 2.
Examples 1 to 4
(1) According to the national Standard for Chinese coal Classification GB5751-86, coal for tamping coking is divided into gas coal, fat coal, coking coal, 1/3 coking coal and lean coal.
(2) The maximum expansion pressure of single coal for various tamping coking is measured by a tamping coal cake expansion pressure measuring instrument, and the measuring result is shown in table 1;
(3) according to the measurement result of the maximum expansion pressure of the single coal for the tamping coking, the coal blending structure is adjusted, and the blending ratio of each single coal is shown in the table 2 after the adjustment, based on the total weight of the coal blending as 100 percent.
TABLE 1
| Coal kind | Maximum expansion pressure kg | Coal kind | Maximum expansion pressure kg |
| Coking coal 1 | 4.9 | 1/3 coking coal 1 | 1.9 |
| Coking coal 2 | 3.5 | 1/3 coking coal 2 | 0.8 |
| Coking coal 3 | 2.2 | 1/3 coking coal 3 | 3.2 |
| Coking coal 4 | 2.6 | 1/3 coking coal 4 | 1.3 |
| Coking coal 5 | 3.4 | 1/3 coking coal 5 | 2.6 |
| Fat coal 1 | 6.8 | Gas coal 1 | 3.4 |
| Fat coal 2 | 4.9 | Gas coal 2 | 2.3 |
| Fat coal 3 | 5.6 | Gas coal 3 | 2.8 |
| Lean coal 1 | 2.6 | Lean coal 2 | 3.3 |
TABLE 2
| Coal kind | Reference example | Example 1 | Example 2 | Example 3 | Example 4 |
| Coking coal 1 | 25％ | 0 | 0 | 0 | 0 |
| Coking coal 2 | 15％ | 15％ | 10％ | 5％ | 10％ |
| Coking coal 3 | 0 | 15％ | 20％ | 20％ | 20％ |
| Coking coal 4 | 0 | 10％ | 15％ | 15％ | 15％ |
| Coking coal 5 | 10％ | 10％ | 5％ | 0 | 5％ |
| 1/3 coking coal 1 | 0 | 0 | 0 | 0 | 0 |
| 1/3 coking coal 2 | 0 | 10％ | 15％ | 20％ | 10％ |
| 1/3 coking coal 3 | 20％ | 0 | 0 | 0 | 0 |
| 1/3 coking coal 4 | 0 | 10％ | 20％ | 20％ | 15％ |
| 1/3 coking coal 5 | 15％ | 15％ | 0 | 0 | 0 |
| Gas coal 1 | 5％ | 5％ | 0 | 0 | 0 |
| Gas coal 2 | 0 | 0 | 5％ | 10％ | 15％ |
| Gas coal 3 | 0 | 0 | 0 | 0 | 0 |
| Fat coal 1 | 10％ | 10％ | 0 | 0 | 0 |
| Fat coal 2 | 0 | 0 | 10％ | 10％ | 10％ |
| Fat coal 3 | 0 | 0 | 0 | 0 | 0 |
Test example
The coal blending pressures and coke pushing currents in the reference examples and examples 1 to 4 were measured. The results are shown in Table 3.
TABLE 3
As can be seen from the data of the reference example and examples 1 to 4 in Table 3, the coal blending expansion pressure and thus the coke pushing current, i.e., the coke pushing resistance, are gradually reduced as the coal blending structure is adjusted and optimized. The control method of the tamping coking resistance can reduce the expansion pressure of the coal blending through reasonably adjusting the structure of the coal blending, thereby reducing the resistance of the tamping coking, further reducing the pressure on the oven wall in the tamping coking process and prolonging the service life of the tamping coking oven.
The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention, including combinations of various technical features in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the invention, and all fall within the scope of the invention.
Claims (9)
1. A control method for tamping coking resistance is characterized by comprising the following steps:
(1) measuring the maximum expansion pressure of single coal for tamping coking;
(2) and adjusting the structure of the coal blending for tamping coking according to the measurement result.
2. The method for controlling the tamping coke pushing resistance according to claim 1, wherein said adjusting the structure of the coal blending for tamping coking means reducing the expansion pressure of the coal blending by adjusting the structure of the coal blending.
3. The tamping coke pushing resistance control method according to claim 2, wherein the method for reducing the expansion pressure of the coal blending by adjusting the structure of the coal blending comprises replacing the high expansion coal with the low expansion coal in the same kind of coal with the same caking property range according to the coke quality requirement.
4. The tamping coke pushing resistance control method according to claim 3, wherein the unchanged caking property range means that the caking index is controlled within a range of 75-85.
5. The method for controlling tamping coke pushing resistance according to claim 2, wherein said method for reducing the expansion pressure of the coal blending by adjusting the structure of the coal blending comprises replacing the highly expansive main coke coal with 1/3 coke coal having a low partial expansion property while ensuring that the main coke coal is blended at 40 wt% or more.
6. The tamping coke pushing resistance control method according to claim 2, wherein said method for reducing the coal blending expansion pressure by adjusting the coal blending structure comprises replacing a portion of 1/3 coke coal with less expansive gas coal.
7. The stamp-charging coke pushing resistance control method according to claim 1, wherein in the step (1), before the measuring the maximum expansion pressure of the individual coals for stamp-charging coking, further comprising classifying the individual coals for stamp-charging coking according to a bituminous coal classification method.
8. The method of controlling stamp-charging coke pushing resistance according to claim 7, wherein said single coal for stamp-charging coking includes gas coal, fat coal, coking coal, 1/3 coking coal and lean coal.
9. The tamping coke pushing resistance control method according to claim 1, wherein in step (1), said maximum expansion pressure is measured by using a coal expandability measuring device.
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Cited By (3)
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| CN111647414A (en) * | 2020-06-16 | 2020-09-11 | 攀钢集团西昌钢钒有限公司 | Method for adjusting starting current of tamping coke oven by controlling coal proportion |
| CN111944550A (en) * | 2020-09-03 | 2020-11-17 | 攀钢集团研究院有限公司 | Tamping coking mixed coal material with low coke-pushing current |
| CN113563911A (en) * | 2020-04-29 | 2021-10-29 | 宝山钢铁股份有限公司 | Coke production optimization method based on reduction of coke pushing large current and coke pushing difficulty occurrence rate |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113563911A (en) * | 2020-04-29 | 2021-10-29 | 宝山钢铁股份有限公司 | Coke production optimization method based on reduction of coke pushing large current and coke pushing difficulty occurrence rate |
| CN113563911B (en) * | 2020-04-29 | 2022-10-21 | 宝山钢铁股份有限公司 | Coke production optimization method based on reduction of coke pushing large current and coke pushing difficulty occurrence rate |
| CN111647414A (en) * | 2020-06-16 | 2020-09-11 | 攀钢集团西昌钢钒有限公司 | Method for adjusting starting current of tamping coke oven by controlling coal proportion |
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| CN111944550A (en) * | 2020-09-03 | 2020-11-17 | 攀钢集团研究院有限公司 | Tamping coking mixed coal material with low coke-pushing current |
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Application publication date: 20200121 |