CN110776935A - Method for reducing tamping coke pushing current - Google Patents
Method for reducing tamping coke pushing current Download PDFInfo
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- CN110776935A CN110776935A CN201911017943.4A CN201911017943A CN110776935A CN 110776935 A CN110776935 A CN 110776935A CN 201911017943 A CN201911017943 A CN 201911017943A CN 110776935 A CN110776935 A CN 110776935A
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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
- C10B31/00—Charging devices
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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
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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
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
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Abstract
The invention relates to the field of tamping coking processes, and discloses a method for reducing tamping coke pushing current. The method comprises the following steps: (1) respectively carrying out a 200kg coke oven coking test on the single coal for coking by the tamping coke oven, and calculating the shrinkage rate of the single coal during coking; (2) preparing a coal blending scheme according to the shrinkage rate of single coal, carrying out a 200kg coke oven coking test, calculating the shrinkage rate, and detecting the post-reaction strength of coke; (3) screening out the proposal that the shrinkage rate is more than 3 percent and the strength is more than or equal to 55 percent after the coke reaction during the coal blending coking in the step (2), and carrying out tamping coking production. The method is used for carrying out a coking test on the single coal for tamping coking, mastering the shrinkage rate of each single coal, guiding coal blending according to the requirement on the quality of the tamping coke and the coking shrinkage rate of the single coal, improving the shrinkage rate of the coal blending coking on the premise of ensuring the quality of the coke, reducing tamping coke pushing current, further reducing the damage to a furnace body and prolonging the service life of the furnace body.
Description
Technical Field
The invention relates to the field of tamping coking processes, in particular to a method for reducing tamping coke pushing current.
Background
At present, domestic tamping coke ovens generally have damaged oven bodiesEarly and short service life. The phenomena of corrosion, cracks, leakage and the like of the oven wall of the carbonization chamber begin to appear when the common stamp-charging coke oven operates for about 3 years, and then the phenomena gradually develop into the phenomena of perforation of the oven wall of the carbonization chamber, blockage of a vertical flame path of a combustion chamber and deformation of the oven wall of the carbonization chamber. After the operation is carried out for 6-8 years, the number of damaged parts of the furnace body is increased, the damage speed is accelerated, the damage degree reaches or even exceeds the state of the last stage of the age of the top-loading coke oven, and the middle repair stage and the overhaul stage of the coke oven are earlier entered. This is because the specific bulk gravity of the coal cake charged into the stamp-charging coke oven is about 1.0 to 1.1t/m
3The bulk density is far higher than that of the coal charged into the top-charging coke oven by 0.75t/m
3. The expansion pressure generated by the coal cake in the coking process is 6-8 times of that of a top-mounted coke oven, and the coke shrinks less after being mature, the gap between the coke cake and the oven wall is small, so that the coke pushing current is large, and the oven wall is easy to damage.
Disclosure of Invention
The invention aims to solve the problems that the tamping coke oven is damaged and the operating life of the tamping coke oven is shortened due to large tamping coke pushing current in the prior art, and provides a method for reducing the tamping coke pushing current.
In order to achieve the above object, the present invention provides a method for reducing tamping coke-pushing current, comprising the steps of:
(1) respectively carrying out a 200kg coke oven coking test on single coal for coking by a tamping coke oven, measuring a coke line and a coal line, and calculating the shrinkage rate of the single coal during coking;
(2) preparing a coal blending coking test scheme according to the shrinkage rate of the single coal obtained in the step (1) during coking, carrying out a 200kg coke oven coking test, measuring a coke line and a coal line, calculating the shrinkage rate, and detecting the strength of the coke after reaction;
(3) screening out the proposal that the shrinkage rate is more than 3% during coal blending and coking in the step (2) and the strength is more than or equal to 55% after the coke reaction, and carrying out tamping coking production.
Preferably, in step (1), the stamp-charging coke oven is coking with a single coal selected from the group consisting of lean coke, coking coal, 1/3 coking coal, gas coal and fat coal.
Preferably, in step (1), the lean coke coal is selected from Shanxi lean coke coal, the gas coal is selected from northwest gas coal, and the fat coal is selected from northwest fat coal.
Preferably, in the step (1), the coking coal is selected from at least one of Shanxi common coking coal, Gansu coking coal, Shanxi single coking coal and Chongqing low-sulfur coking coal.
Preferably, in the step (1), the 1/3 coking coal is selected from at least one of Panjiang 1/3 coking coal, northwest 1/3 coking coal and Chuanyu 1/3 coking coal.
Preferably, in the step (2), the principle of preparing the coal blending coking test scheme is that the lean coking coal is used in an amount of 0-15 wt%, the coking coal is used in an amount of 40-55 wt%, the 1/3 coking coal is used in an amount of 30-40 wt%, the gas coal is used in an amount of 2-12 wt%, and the fat coal is used in an amount of 2-12 wt%, based on 100% of the total mass of the coal blending.
Preferably, the scheme that the shrinkage rate during coal blending and coking in the step (2) is 4-15% and the strength after coke reaction is 55-70% is screened out for carrying out tamping coking production.
Further preferably, in the step (3), the scheme that the shrinkage rate of the coal blending coking in the step (2) is 5-10% and the strength of the coke after reaction is 58-63% is screened out, and the tamping coking production is carried out.
According to the method, a single coal for tamping coking is subjected to a coking test by using a 200kg coke oven, the shrinkage rate of each single coal during coking is mastered, and coal blending is guided according to the quality requirement of tamping coke and the coking shrinkage rate of the single coal, so that the shrinkage rate during coal blending and coking is improved on the premise of ensuring the quality of the coke, the tamping coke pushing current is reduced, the damage to an oven body can be further reduced, and the service life of the oven body is prolonged.
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 method for reducing tamping coke pushing current, which comprises the following steps:
(1) respectively carrying out a 200kg coke oven coking test on single coal for coking by a tamping coke oven, measuring a coke line and a coal line, and calculating the shrinkage rate of the single coal during coking;
(2) preparing a coal blending coking test scheme according to the shrinkage rate of the single coal obtained in the step (1) during coking, carrying out a 200kg coke oven coking test, measuring a coke line and a coal line, calculating the shrinkage rate, and detecting the strength of the coke after reaction;
(3) screening out the scheme that the coal blending shrinkage rate in the step (2) is more than 3 percent and the strength of the coke after reaction is more than or equal to 55 percent, and carrying out tamping coking production.
According to the method, the tamping coking production is carried out by selecting the scheme with better contractibility and up-to-standard coke quality according to the contractibility under each test scheme and the correlation between the coke quality of a 200kg coke oven test and the coke quality of industrial production under the same proportion, and the shrinkage rate can be improved under the condition of ensuring the coke quality to meet the requirement in the industrial production, so that the tamping coke pushing current is reduced.
In the method according to the invention, the 200kg coke oven coking test is a semi-industrial test for single-coal or blended-coal coking.
In the method, the coke line refers to the height of coke obtained by coking, the coal line refers to the height of a tamped coal cake, and the shrinkage rate of the coal during coking can be calculated by measuring the coke line and the coal line, so that whether the ratio of coal blending is proper or not can be known.
Preferably, in step (1), the stamp-charging coke oven cokes with a single coal selected from the group consisting of lean coke, coking coal, 1/3 coking coal, gas coal, and fat coal. In the method, the classification of the single coal for coking by the stamp-charging coke oven can be carried out according to the national standard GB5751-86 for classification of Chinese coal.
Preferably, in step (1), the lean coke coal is selected from Shanxi lean coke coal, the gas coal is selected from northwest gas coal, and the fat coal is selected from northwest fat coal.
Preferably, in the step (1), the coking coal is at least one selected from the group consisting of Shanxi common coking coal, Gansu coking coal, Shanxi single coking coal and Chongqing low-sulfur coking coal.
Preferably, in the step (1), the 1/3 coke is at least one selected from the group consisting of Qianjiang 1/3 coke, northwest 1/3 coke and Chuanyu 1/3 coke.
In the method of the present invention, preferably, in step (2), the principle of preparing the coal blending coking test scheme is that the lean coking coal is used in an amount of 0-15 wt%, the coking coal is used in an amount of 40-55 wt%, the 1/3 coking coal is used in an amount of 30-40 wt%, the gas coal is used in an amount of 2-12 wt%, and the fat coal is used in an amount of 2-12 wt%, based on 100% of the total mass of the coal blending.
In the method, when a coal blending coking test scheme is prepared, coal with high shrinkage rate can be used for replacing coal with low shrinkage rate in the coal blending process on the premise of ensuring that the scheme follows the principle, so that the shrinkage rate of the coal blending is improved.
In the method, in the step (2), when a 200kg coke oven coking test is carried out, the coal blending scheme that the strength of the screened coke after reaction is more than or equal to 55% is used for ensuring that the quality of the coke obtained by coal blending coking meets the production requirement, and if the strength value after reaction is lower, the crushing resistance and the abrasion resistance of the coke are deteriorated.
Preferably, in the step (3), the scheme that the shrinkage rate of the coal blending coking in the step (2) is 4-15% and the strength of the coke after reaction is 55-70% is screened out, and the tamping coking production is carried out.
Further preferably, in the step (3), the scheme that the shrinkage rate of the coal blending coking in the step (2) is 5-10% and the strength of the coke after reaction is 58-63% is screened out, and the tamping coking production is carried out.
According to the method, a single coal for tamping coking is subjected to a coking test by using a 200kg coke oven, the shrinkage rate of each single coal is mastered, and according to the requirement on the quality of tamping coke and the shrinkage rate of the single coal during coking, coal with high shrinkage rate is used for replacing coal with low shrinkage rate to guide coal blending, so that the shrinkage rate of the coal blending coking is improved on the premise of ensuring the quality of the coke, the tamping coke pushing current is reduced, the damage to a furnace body is further reduced, and the service life of the furnace body is prolonged.
The present invention will be described in detail below by way of examples, but the scope of the present invention is not limited thereto.
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 3
(1) Respectively carrying out 200kg coke oven coking tests on Shanxi lean coke coal, Shanxi common coke coal, Gansu coke coal, Shanxi single coke coal, Chuan Yu low-sulfur coke coal, Panjiang coal, northwest 1/3 coke coal, Chuan Yu 1/3 coke coal, northwest gas coal and northwest fat coal in single coal for coking by a stamp-charging coke oven, measuring a coke line and a coal line, and calculating the shrinkage rate of each single coal during coking, wherein the results are shown in Table 1;
(2) according to the shrinkage rate of the single coal obtained in the step (1) during coking, based on the total mass of the blended coal being 100%, the using amount of the lean coking coal is 0-15 wt%, the using amount of the coking coal is 40-55 wt%, the using amount of the 1/3 coking coal is 30-40 wt%, the using amount of the gas coal is 2-12 wt%, and the using amount of the fat coal is 2-12 wt%, using coal with high shrinkage rate to replace coal with low shrinkage rate, making a multi-group coal blending coking test scheme, developing a coke oven coking test of 200kg, measuring a coke line and a coal line, calculating shrinkage rate, and detecting the strength of the coke after reaction;
(3) and (3) screening out the coal blending scheme which meets the requirements that the shrinkage rate is more than 3% and the strength of coke after reaction is more than or equal to 55% during coal blending coking in the step (2), and carrying out tamping coking industrial production by using the coal blending scheme. In the screened coal blending scheme, the blending ratio of each single coal is shown in table 2, and the strength of the coke after reaction and the shrinkage rate of the coal during coking are shown in table 3, wherein the total weight of the coal blending is 100%.
TABLE 1
TABLE 2
| Reference example | Example 1 | Example 2 | Example 3 | |
| Common coke coal for Shanxi province | 10％ | 10％ | 10％ | 10％ |
| Gansu coking coal | 10％ | 15％ | 20％ | 25％ |
| Single coke coal for Shanxi province | 8％ | 13％ | 13％ | 13％ |
| Chongyu low-sulfur coking coal | 15％ | 10％ | 5％ | 0 |
| Panjiang 1/3 coking coal | 22％ | 27％ | 27％ | 32％ |
| Northwest 1/3 coking coal | 0 | 0 | 0 | 0 |
| Chuan Yu 1/3 coking coal | 15％ | 10％ | 10％ | 5％ |
| Northwest gas coal | 5％ | 5％ | 5％ | 10％ |
| Northwest rich coal | 5％ | 5％ | 10％ | 5％ |
| Lean coke coal in Shanxi province | 10％ | 5％ | 0 | 0 |
TABLE 3
| Post-reaction strength (%) | Shrinkage (%) | |
| Reference example | 57.6 | 2.6 |
| Example 1 | 58.2 | 3.2 |
| Example 2 | 58.6 | 3.6 |
| Example 3 | 59.1 | 4.1 |
Test example
The results of the evaluation of the coke pushing current in the 200kg coke oven coking test in step (2), the coke pushing current in the tamping coke pushing industrial production in step (3) and the post-reaction strength of coke in the reference example and examples 1 to 3 are shown in Table 4.
| Post-reaction strength (%) | Industrial production coke pushing current (A) | |
| Reference example | 64.5 | 420 |
| Example 1 | 64.8 | 390 |
| Example 2 | 65.1 | 365 |
| Example 3 | 65.3 | 315 |
The results in table 4 show that the currents of the reference examples are all larger than those of the examples, and the reaction strength values of the examples and the reference examples meet the quality requirements of industrial production of coke, which indicates that the tamping, pushing and coke blending scheme is optimized by adopting the method of the invention, the coal blending scheme meeting the requirements is screened out for the industrial production of tamping and pushing coke, the tamping, pushing and coke current can be reduced, the damage to a furnace body can be further reduced, and the service life can be prolonged.
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 (8)
1. A method of reducing tamping plug current, the method comprising the steps of:
(1) respectively carrying out a 200kg coke oven coking test on single coal for coking by a tamping coke oven, measuring a coke line and a coal line, and calculating the shrinkage rate of the single coal during coking;
(2) preparing a coal blending coking test scheme according to the shrinkage rate of the single coal obtained in the step (1) during coking, carrying out a 200kg coke oven coking test, measuring a coke line and a coal line, calculating the shrinkage rate, and detecting the strength of the coke after reaction;
(3) screening out the proposal that the shrinkage rate is more than 3% during coal blending and coking in the step (2) and the strength is more than or equal to 55% after the coke reaction, and carrying out tamping coking production.
2. The method of reducing stamp-charging coke pushing current according to claim 1, wherein in step (1), the stamp-charging coke oven cokes with a single coal selected from the group consisting of lean coke, 1/3 coke, gas coal, and fat coal.
3. The method for reducing tamping coke pushing current according to claim 2, wherein in step (1), the lean coke coal is selected from Shanxi lean coke coal, the gas coal is selected from northwest gas coal, and the fat coal is selected from northwest fat coal.
4. The method for reducing tamping and coke pushing current as claimed in claim 2, wherein in step (1), the coking coal is at least one selected from Shanxi ordinary coking coal, Gansu coking coal, Shanxi single coking coal and Chongqing low-sulfur coking coal.
5. The method for reducing the tamping and coke pushing current as claimed in claim 2, wherein in step (1), said 1/3 coking coals are selected from at least one of the group consisting of Panjiang 1/3 coking coals, northwest 1/3 coking coals and Chongqing 1/3 coking coals.
6. The method for reducing tamping and coke pushing current as claimed in claim 1, wherein in step (2), the principle of preparing the coal blending coking test scheme is that the lean coking coal is used in an amount of 0-15 wt%, the coking coal is used in an amount of 40-55 wt%, the 1/3 coking coal is used in an amount of 30-40 wt%, the gas coal is used in an amount of 2-12 wt%, and the fat coal is used in an amount of 2-12 wt%, based on 100% of the total mass of the coal blending.
7. The method for reducing tamping and coke pushing current as claimed in claim 1, wherein in step (3), the tamping coking production is performed by screening the scheme that the shrinkage rate of the coal blending coking in step (2) is 4-15% and the strength of the coke after reaction is 55-70%.
8. The method for reducing tamping and coke pushing current as claimed in claim 1 or 7, wherein in step (3), the scheme that the shrinkage rate of the coal blending for coking in step (2) is 5-10% and the strength of the coke after reaction is 58-63% is screened out for carrying out tamping coking production.
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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 |
| CN111979368A (en) * | 2020-08-27 | 2020-11-24 | 宝武集团鄂城钢铁有限公司 | Process method for increasing blast furnace coke supply |
| CN113322085A (en) * | 2021-07-02 | 2021-08-31 | 攀钢集团攀枝花钢钒有限公司 | Coal cake production method for tamping coking |
| 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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| 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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| CN111979368B (en) * | 2020-08-27 | 2022-04-01 | 宝武集团鄂城钢铁有限公司 | Process method for increasing blast furnace coke supply |
| 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 |
| CN113322085A (en) * | 2021-07-02 | 2021-08-31 | 攀钢集团攀枝花钢钒有限公司 | Coal cake production method for tamping coking |
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