CN117436605A - Method for evaluating quality of coking coal by using detection results of different types of small coke ovens - Google Patents
Method for evaluating quality of coking coal by using detection results of different types of small coke ovens Download PDFInfo
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- 239000000571 coke Substances 0.000 title claims abstract description 141
- 239000003245 coal Substances 0.000 title claims abstract description 135
- 238000004939 coking Methods 0.000 title claims abstract description 126
- 238000001514 detection method Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000002474 experimental method Methods 0.000 claims abstract description 21
- 238000005070 sampling Methods 0.000 claims abstract description 4
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- 238000013441 quality evaluation Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 238000002156 mixing Methods 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000011335 coal coke Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
The invention belongs to the technical field of coking coal blending, and relates to a method for evaluating coking coal quality by using detection results of different types of small coke ovens, which is characterized by comprising the following steps of: firstly, making different types of small coke oven experiments to obtain thermal intensity difference standards according to different types of coking coals, simultaneously making quality standards of each single variety of coking coals under certain types of small coke oven experiment conditions, carrying out coke thermal intensity detection according to different small coke oven types after the coking coals are put into a factory for sampling, and then evaluating the quality of the coking coals according to the small coke oven types and the coke thermal intensity difference values. The invention realizes the unified evaluation of the detection heat intensity of the same coking coal according to the small coke oven experiments of different types, and simultaneously realizes the evaluation of coking coal, fat coal and 1/3 coking coal with different heat intensity standards, thereby being beneficial to guiding the quality evaluation and purchase of the coking coal.
Description
Technical Field
The invention belongs to the technical field of coking coal blending, and relates to a method for evaluating coking coal quality by using detection results of different types of small coke ovens.
Background
The thermal strength detected by the coking coal single-variety small coke oven experiment is used as an important index for evaluating the quality of coking coal. The small coke ovens are divided into top-mounted small coke ovens, bottom-mounted small coke ovens and side-mounted small coke ovens according to the furnace-entering mode; the coking coal is divided into 1Kg small coke oven, 2Kg small coke oven, 40Kg small coke oven, 70Kg small coke oven, 100Kg small coke oven, 200Kg small coke oven and the like according to the using weight of the coking coal; the small coke ovens are classified into pressurized small coke ovens and non-pressurized (conventional) small coke ovens according to the bearing state of the small coke oven coal cake. The coke detection thermal intensity obtained by the same coking coal variety and different small coke oven type experiments is different. At present, each domestic iron and steel plant generally adopts the small coke oven of the same type to detect the thermal intensity of single coal coke, and the small coke oven of 40Kg is widely used by comprehensively considering the stability of experimental results and labor intensity.
At present, 40Kg small coke ovens in China mainly comprise pressurized small coke ovens and non-pressurized (conventional) small coke ovens. Freely expanding and contracting the coal cake in the experimental process of the non-pressurized small coke oven; the pressurizing small coke oven applies a certain pressure to the coal cake, and the coal cake is affected by the pressure in the experimental process of the small coke oven to influence the coke quality. Generally, other experimental parameters are the same, and the detection thermal intensity of the pressurized small coke oven is higher than that of the non-pressurized small coke oven. The quality evaluation can be carried out according to the standard aiming at the same type of small coke oven experiment detection thermal intensity, but the effective evaluation cannot be carried out on the coke thermal intensity detected by different small coke oven type experiments, which is not beneficial to the quality evaluation and purchase of coking coal.
Disclosure of Invention
In view of the above, the present invention aims to solve the above problems and provide a method for evaluating quality of coking coal by using different types of small coke oven detection results.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a method for evaluating quality of coking coal by using detection results of different types of small coke ovens comprises the steps of firstly making thermal intensity difference standards obtained by experiments of different types of small coke ovens according to different types of coking coal, simultaneously making quality standards of each single variety of coking coal under the experimental conditions of a certain type of small coke ovens, carrying out coke thermal intensity detection according to different small coke oven types after the coking coal is sampled in a factory, and then evaluating quality of the coking coal according to the small coke oven types and the coke thermal intensity difference values.
Further, classifying the coking coal according to the type of the coking coal, and dividing the coking coal into coking coal, fat coal, 1/3 coking coal, gas coal and lean coal;
selecting a certain small coke oven type as a reference, detecting the thermal intensity of single-variety small coke oven coke according to small coke oven experimental equipment, and formulating a standard value of the thermal intensity of single-variety small coke oven coke of each coking coal variety; classifying coking coal attributes according to the thermal intensity value of the single-variety coke, and establishing a coking coal attribute classification standard according to the thermal intensity value from high to low;
and then detecting the thermal intensity of single-variety small coke oven coke through other small coke oven types, and making different small coke oven type experiment detection thermal intensity difference standards of various coking coal type attributes by comparing different small coke oven type experiments, thereby judging whether the coking coal quality is qualified or not through whether the detection result difference values of different oven types meet the thermal intensity difference standards or not.
Further, in the classification of coking coal properties, coking coals are classified into high-strength coking coal, medium-strength coking coal and low-strength coking coal according to the hot strength value from high to low, and fat coals are classified into high-strength fat coal, medium-strength fat coal and low-strength fat coal; 1/3 coking coals are classified into high-strength 1/3 coking coals, medium-strength 1/3 coking coals and low-strength 1/3 coking coals.
Further, the type of small coke oven experimental equipment is randomly selected through shaking after the coking coal is sampled in a factory.
Compared with the prior art, the invention has the following beneficial effects:
the invention realizes the unified evaluation of the detection heat intensity of the same coking coal according to the small coke oven experiments of different types, and simultaneously realizes the evaluation of coking coal, fat coal and 1/3 coking coal with different heat intensity standards, thereby being beneficial to guiding the quality evaluation and purchase of the coking coal.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention.
A method for evaluating quality of coking coal by using detection results of different types of small coke ovens comprises the steps of firstly making thermal intensity difference standards obtained by experiments of different types of small coke ovens according to different types of coking coal, simultaneously setting quality standards of each single variety of coking coal under the experimental conditions of a certain type of small coke ovens, carrying out coke thermal intensity detection according to different small coke oven types after the coking coal is sampled in a factory, and then evaluating quality of the coking coal according to the small coke oven types and the coke thermal intensity difference values.
Classifying coking coal according to the type of the coking coal, namely classifying the coking coal into coking coal, fat coal, 1/3 coking coal, gas coal and lean coal, selecting a small coke oven type as a standard, detecting the thermal strength of single-variety small coke oven coke according to small coke oven experimental equipment, and formulating a standard value of the thermal strength of single-variety small coke oven coke of each coking coal variety; classifying coking coal attributes according to the thermal intensity value of the single-variety coke, and establishing a coking coal attribute classification standard according to the thermal intensity value from high to low;
and then detecting the thermal intensity of single-variety small coke oven coke through other small coke oven types, and comparing different small coke oven type experiments to formulate different small coke oven type experiment detection thermal intensity difference standards of various coking coal type attributes, thereby realizing that detection results of other oven types are obtained according to the detection result of any small coke oven type.
And selecting a certain small coke oven type as a reference. Suppose that a pressurized 40Kg small oven pilot plant was chosen as the reference plant. And detecting the thermal strength of the single-variety small coke oven coke according to the pressurized small coke oven experimental equipment, and formulating a standard value of the thermal strength of the single-variety small coke oven coke of each coking coal (coking coal, fat coal, 1/3 coking coal).
Coking coal attribute classification standard
| Coking coal attribute | Standard thermal strength (40 Kg under pressure)%, |
| high-strength coking coal | ≥72 |
| Medium-strength coking coal | ≥65 |
| Low-strength coking coal | ＜65 |
| High-strength fat coal | ≥60 |
| Medium-strength fat coal | ≥50 |
| Low-strength fat coal | ＜50 |
| High-strength 1/3 coking coal | ≥60 |
| Medium-strength 1/3 coking coal | ≥50 |
| Low-strength 1/3 coking coal | ＜50 |
Coking coal attribute classification
Different coking coal types are subjected to coke thermal intensity difference value detection according to a 40Kg non-pressurized small coke oven and a 40Kg pressurized small coke oven experiment to establish a difference standard.
And (3) quality evaluation:
and (3) taking 40Kg of pressurized small coke ovens as a reference, detecting coking coal entering a factory by using 40Kg of pressurized small coke ovens, and comparing the detection result with a standard, and judging whether the detection result meets the standard requirement or not. Assuming that the coking coal I is detected by a 40Kg pressurizing small coke oven after being sampled in a factory, if the detected heat intensity is 76%, the batch is considered to be qualified (the heat intensity 76% meets the standard requirement of more than or equal to 75%); if the thermal strength is detected to be 70%, the batch is considered to be unqualified (the thermal strength of 70% does not reach the standard requirement of more than or equal to 75%).
And (3) taking 40Kg of pressurized small coke ovens as a reference, detecting coking coal entering a factory by using 40Kg of non-pressurized small coke ovens, and comparing the detection result with a difference standard, and considering that the detection result meets the difference standard requirement.
Such as: the coking coal I is sampled in a factory, and then the hot strength is detected by a small non-pressurized coke oven, and the quality judgment steps are as follows:
1) Firstly, comparing a standard value (more than or equal to 75%) of coking coal I with a coking coal attribute classification standard to obtain coking coal type attribute (more than or equal to 72% of coking coal is high-strength coking coal);
2) And then obtaining 40Kg of standard of difference of thermal intensity of coke detected by the experiment of the non-pressurized small coke oven and the pressurized small coke oven according to the coking coal type attribute, namely 40Kg (standard of pressurized thermal intensity-non-pressurized thermal intensity) is less than or equal to 7 percent.
3) And judging according to the actual detection result. Assuming that the coking coal I is detected by a 40Kg non-pressurized small coke oven after being sampled in a factory, and the detected heat intensity is 67%, 75% -67% = 8%, the coking coal I does not meet the standard of less than or equal to 7%, which indicates that the quality of the coking coal I does not meet the standard requirement. 75% -7% = 68%,67% -68% = -1%, namely, the detection heat intensity of the coking coal I by using 40Kg of non-pressurized small coke oven is lower than the standard 1%, and the purchasing department can penalize suppliers according to contracts.
After the coking coal is sampled in a factory, the coking coal is determined from the automatic shaking number of the system according to the detection of a 40Kg pressurized small coke oven or the detection of a 40Kg non-pressurized small coke oven.
Examples are: assuming that the fat coal I enters a sampling group and is batch number ZPT20231001001, the system shaking number is detected by a 40Kg non-pressurized small coke oven, and the detected heat intensity is 55%. Now, whether the quality of the product meets the standard requirement is judged:
1) The standard of the fat coal I is more than or equal to 60 percent (40 Kg of pressurized small coke oven), and belongs to high-strength fat coal.
2) According to the coking coal type attribute, 40Kg of a standard for detecting the difference of the coke heat intensity by experiments of a 40Kg non-pressurized small coke oven and a 40Kg pressurized small coke oven (pressurized heat intensity standard-non-pressurized heat intensity) is less than or equal to 8 percent.
3) The standard of the detection heat intensity of the pressurized small coke oven of the fat coal I is 60%, the detection heat intensity of the non-pressurized small coke oven is 55%, 60% -55% =5%, the difference standard of less than or equal to 8% is achieved, namely, the detection heat intensity of the 40Kg non-pressurized small coke oven meets the requirement, and the quality is considered as qualified.
Assuming that the fat coal I enters a sampling group and is batch number ZPT20231010003, the system shaking number is detected by a 40Kg non-pressurized small coke oven, and the detected heat intensity is 50%. 60% -50% = 10% of the standard of difference less than or equal to 8%, namely the detection heat intensity of the 40Kg non-pressurized small coke oven does not meet the requirement, and the small coke oven is regarded as unqualified. 60% -8% = 52%,50% -52% = -2%, namely fertilizer coal I enters the batch number ZPT20231010003 of the sample group of factory and detects with 40Kg of small non-pressurized coke oven, the detection result is unqualified, lower than standard 2%.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is intended to be covered by the claims of the present invention.
Claims (4)
1. A method for evaluating quality of coking coal by using detection results of different types of small coke ovens is characterized by comprising the following steps: firstly, making different types of small coke oven experiments to obtain thermal intensity difference standards according to different types of coking coals, simultaneously making quality standards of each single variety of coking coals under certain types of small coke oven experiment conditions, carrying out coke thermal intensity detection according to different small coke oven types after the coking coals are put into a factory for sampling, and then evaluating the quality of the coking coals according to the small coke oven types and the coke thermal intensity difference values.
2. The method for evaluating quality of coking coal according to the detection result of different types of small coke ovens of claim 1, wherein: classifying the coking coal according to the type of the coking coal, and classifying the coking coal into coking coal, fat coal, 1/3 coking coal, gas coal and lean coal,
selecting a certain small coke oven type as a reference, detecting the thermal intensity of single-variety small coke oven coke according to small coke oven experimental equipment, and formulating a standard value of the thermal intensity of single-variety small coke oven coke of each coking coal variety; classifying coking coal attributes according to the thermal intensity value of the single-variety coke, and establishing a coking coal attribute classification standard according to the thermal intensity value from high to low;
and then detecting the thermal intensity of single-variety small coke oven coke through other small coke oven types, and making different small coke oven type experiment detection thermal intensity difference standards of various coking coal type attributes by comparing different small coke oven type experiments, thereby judging whether the coking coal quality is qualified or not through whether the detection result difference values of different oven types meet the thermal intensity difference standards or not.
3. The method for evaluating quality of coking coal according to the detection result of different types of small coke ovens of claim 2, wherein: in the coking coal attribute classification, the coking coals are classified into high-strength coking coal, medium-strength coking coal and low-strength coking coal according to the hot strength value, and the coking coals are classified into high-strength coking coal, medium-strength coking coal and low-strength coking coal; 1/3 coking coals are classified into high-strength 1/3 coking coals, medium-strength 1/3 coking coals and low-strength 1/3 coking coals.
4. The method for evaluating quality of coking coal according to the detection result of different types of small coke ovens of claim 2, wherein: and (5) after the coking coal is sampled in a factory, the type of small coke oven experimental equipment is randomly selected through shaking numbers.
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