CN112521965A - Rapid coal blending method - Google Patents
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- 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
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Abstract
The invention discloses a rapid coal blending method, which comprises the following steps: establishing a macro index database and a micro index database, predicting traditional indexes such as coal composition, sulfur content and the like of the blended coal through the macro index database, measuring vitrinite reflectance indexes of various coals in the blended coal through the micro index database to obtain vitrinite reflectance distribution maps of various coals in the blended coal, superposing the vitrinite reflectance distribution maps of various coals in the blended coal according to the coal composition ratio of the blended coal to obtain a total vitrinite reflectance distribution map of the blended coal, and taking the coal blending scheme of the blended coal as a production scheme when the total vitrinite reflectance distribution map is in continuous non-concave normal distribution and the standard deviation is greater than a preset standard deviation value. The rapid coal blending method can shorten the coal blending time and improve the quality of coke.
Description
Technical Field
The invention relates to the technical field of coal blending and coking, in particular to a rapid coal blending method.
Background
At present, the single coal sold in the market is basically the mixed coal. In the process of coking and coal blending, the proportion of various coal types needs to be adjusted so that coal quality indexes such as volatile components, caking indexes, colloid layer thickness and the like meet the requirements of coking coal.
Because the coal is mixed coal, the proportion of the real coking coal is probably very small when the traditional coal blending index meets the requirement, and the coal needs to be blended again when the production requirement cannot be met. In the prior art, multiple tests are needed to determine the final production scheme during coal blending, for example, the traditional coal blending generally provides multiple coal blending schemes at one time by adjusting various coal components, and a group with the best coke result is taken as the production scheme after the test coke oven coking. Therefore, the time period of the traditional coal blending test process is long, the development from coal blending to production is slow, the coking requirement cannot be met, and the stable quality of coke and the stable operation of a blast furnace are influenced.
There are many patents aiming at the proposed coal blending system, such as "intelligent control system for coking and coal blending" which uses computer to control coal blending, sets up different structural layers, constructs database, and rapidly calculates the optimal coal blending ratio by different algorithms to improve the coal blending efficiency. But only focuses on the simplicity and rapidity of intelligent control and does not consider the coal rank reality.
Some patents consider coal petrophysical indexes, for example, in patent documents with patent numbers CN105316017B and CN105713632B, the reflectivity index of vitrinite of the blended coal after being superimposed is measured, and the coke quality is improved by adjusting the reflectivity distribution result. However, no patent is available at present for forming a system with quick response from coal blending to production by using a database in combination with a traditional method and coal rock analysis.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the embodiment of the invention provides a rapid coal blending method which can shorten the coal blending time and improve the quality of coke.
The rapid coal blending method according to the embodiment of the invention comprises the following steps:
establishing a macro index database, wherein the macro index database comprises a plurality of single coal indexes;
establishing a microscopic index database, wherein the microscopic index database comprises vitrinite reflectivity indexes of the single coal;
generating a plurality of groups of coal blending schemes, and predicting the coal blending macro indexes of each scheme through each single coal index in the macro index database;
measuring vitrinite reflectance indexes of all coal types in the blended coal through the microscopic index database to obtain vitrinite reflectance distribution maps of all coal types in the blended coal of all schemes;
superposing vitrinite reflectance distribution maps of all the coal types in the blended coal according to the coal type proportion of the blended coal to obtain a total vitrinite reflectance distribution map of the blended coal of each scheme;
when the total vitrinite reflectance distribution diagram is in continuous non-concave normal distribution and the standard deviation is larger than a preset standard difference value, outputting a coal blending scheme of the blended coal, when the total vitrinite reflectance distribution diagram is not in continuous non-concave normal distribution, adjusting the proportion of each coal in the blended coal, and repeating the steps until the total vitrinite reflectance distribution diagram is in continuous non-concave normal distribution approximately;
and comparing all indexes of the output coal blending scheme, selecting an optimal coal blending scheme for coke property determination by combining cost factors, and taking the coal blending scheme of the mixed coal as a production scheme when the coke quality of the mixed coal meets the coke quality index.
According to the rapid coal blending method provided by the embodiment of the invention, each index of blended coal is predicted by a macro index database, and measured single coal vitrinite reflectance maps are superposed according to the ratio. And when the total vitrinite reflectance distribution graph is in continuous non-concave normal distribution and the standard deviation is greater than a preset standard deviation value, determining that the properties of the blended coal meet the requirements. When the total vitrinite reflectance distribution diagram is not in continuous non-concave normal distribution, the index measurement can be carried out by adding corresponding coal types into the notch or reducing the coal types on the left side and the right side of the notch and newly forming a coal blending scheme. Therefore, the rapid coal blending method provided by the embodiment of the invention can save a plurality of groups of test coke oven test processes, ensure the stability and continuity of colloidal body precipitation, improve the coke quality and effectively shorten the coal blending time.
In some embodiments, the coke property determination is performed on the blended coal of the blending schedule, and when the coke quality of the blended coal meets a coke quality index, the blending schedule of the blended coal is taken as a production schedule, comprising the steps of:
crushing, mixing and humidifying various coals of the optimal coal blending scheme;
performing a coke oven test on the blended coal;
and measuring the quality of the coke after the mixed coal is coked, and taking the coal blending scheme of the mixed coal as a production scheme when the quality of the coke meets the coke quality index.
In some embodiments, the rapid coal blending method further comprises the steps of:
inputting the production scheme and the coke quality index into the macro index database;
and establishing a mathematical model of each index in the macro index database and each index in the micro index database to predict the coke quality of the mixed coal.
In some embodiments, the coke quality indicator comprises an ash indicator, a volatiles indicator, a moisture indicator, a fixed carbon indicator, a sulfur indicator, a bond index, a gum layer index, and a cost.
In some embodiments, the blended coal content in the coke oven test is from 40kg to 200 kg.
In some embodiments, the single coal species includes gas coal, 1/3 coking coal, fat one, fat two, coke one, coke two, lean coking coal, lean coal, and lean coal.
In some embodiments, the vitrinite reflectance index includes a vitrinite reflectance distribution, a vitrinite average reflectance, and a vitrinite maximum reflectance.
In some embodiments, the predetermined standard deviation value is 0.2.
In some embodiments, when the total vitrinite reflectance profile does not exhibit a continuous non-concave normal distribution, adding vitrinite maximum reflectance at the notch or subtracting out coal on the left or right side of the notch.
Drawings
FIG. 1 is a flow chart of a rapid coal blending method according to an embodiment of the invention.
FIG. 2 is a mirror image reflectance distribution diagram of the first embodiment of the present invention 1.
FIG. 3 is a mirror image reflectance distribution diagram of embodiment two of the present invention.
FIG. 4 is a mirror image reflectance distribution diagram of embodiment 1 of the present invention.
FIG. 5 is a mirror image reflectance distribution of embodiment four of the present invention.
FIG. 6 is a vitrinite reflectance distribution graph of option five of example 1 of the present invention.
FIG. 7 is a vitrinite reflectance profile of the initial blended coal of example 2 of the present invention.
FIG. 8 is a distribution diagram of vitrinite reflectance of the modified blended coal of example 2 of the present invention.
FIG. 9 is a vitrinite reflectance profile of the initial blended coal of example 3 of the present invention.
FIG. 10 is a distribution diagram of vitrinite reflectance of the modified blended coal of example 3 according to the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The fast coal blending method according to an embodiment of the present invention is described below with reference to the accompanying drawings.
As shown in fig. 1, the rapid coal blending method according to the embodiment of the invention comprises the following steps:
s1, establishing a macro index database, wherein the macro index database comprises a plurality of single coal indexes, and predicting the macro indexes of the blended coal by utilizing the macro index database to perform a plurality of groups of coal blending schemes;
s2, establishing a microscopic index database, wherein the microscopic index database comprises vitrinite reflectance indexes of single coal types, and measuring vitrinite reflectance indexes of various coal types in the blended coal through the microscopic index database to obtain vitrinite reflectance distribution maps of various coal types in the blended coal;
superposing vitrinite reflectance distribution maps of various coal types in the blended coal according to the coal type ratio of the blended coal to obtain a total vitrinite reflectance distribution map of the blended coal;
s3, outputting a coal blending scheme of blended coal when the total vitrinite reflectance distribution diagram is in continuous non-concave normal distribution and the standard deviation is larger than a preset standard deviation value, adjusting the ratio of various coal types in the blended coal when the total vitrinite reflectance distribution diagram is not in continuous non-concave normal distribution, and repeating the steps until the total vitrinite reflectance distribution diagram is in continuous non-concave normal distribution;
and (3) performing coke property measurement on the mixed coal in the coal blending scheme, and taking the coal blending scheme of the mixed coal as a production scheme when the coke quality of the mixed coal meets the coke quality index.
Specifically, the plurality of individual coal types in the macro metric database include, but are not limited to, gas coal, 1/3 coking coal, fat one, fat two, coke one, coke two, lean coking coal, lean coal, and lean coal. Further, the macro index database also comprises ash A, volatile components V, moisture M, fixed carbon C, sulfur S, a bonding index G, a colloidal layer index Y and cost co.
Specifically, the microscopic index database comprises vitrinite reflectance indexes of single coal types, including vitrinite average reflectance and vitrinite maximum reflectance. Furthermore, the index and distribution of the vitrinite reflectivity are measured according to the national standard GB/T6948.
According to the rapid coal blending method provided by the embodiment of the invention, various indexes of blended coal are predicted by a macro index database, measured single coal vitrinite reflectance maps are superposed according to the ratio, and common coking requirements such as coal composition, sulfur composition, G value, Y value and the like are matched.
And when the total vitrinite reflectance distribution graph is in continuous non-concave normal distribution and the standard deviation is greater than a preset standard deviation value, determining that the properties of the blended coal meet the requirements. Preferably, the preset standard deviation value is 0.2.
When the total vitrinite reflectance distribution diagram is not in a continuous non-concave normal distribution, the index measurement can be carried out by adding corresponding coal types into the notch or reducing the coal types on the left side or the right side of the notch and reforming a coal blending scheme. Therefore, the rapid coal blending method provided by the embodiment of the invention can shorten the coal blending time and improve the quality of coke.
In some embodiments, for a coal blending scheme meeting the above requirements, the macroscopic indicators, the coal rock analysis results and the coal type cost are combined to determine an optimal coal blending scheme.
Further, the rapid coal blending method also comprises the following steps:
s4, optimizing the coal blending scheme by combining the coal quality index and the cost;
s5, taking coal, mixing the coal and adjusting moisture according to a coal blending scheme;
s6, performing coke oven test on the mixed coal, wherein the content of the blended coal in the coke oven test is 40kg-200kg optionally.
S7, measuring the quality of the coke after the mixed coal is coked;
and S8, when the coke quality meets the coke quality index, taking the coal blending scheme of the mixed coal as a production scheme.
For example, the cold and hot properties of the coke can be measured, and the cold and hot properties of the coke are mainly CSR, CRI, M10、M40And detection is carried out according to national standards GB/T4000-2008 and GB/T2006-2008.
Further, the coke quality indexes comprise an ash content index, a volatile component index, a moisture index, a fixed carbon index, a sulfur content index, a bonding index, a colloid layer index and cost, and the coke quality indexes are recorded into a macroscopic index database. And establishing a mathematical model of each index in the macroscopic index database and each index in the microscopic index database to predict the coke quality of the mixed coal.
The rapid coal blending method has the following advantages:
(1) the coal blending response time is shortened, and a good coal blending scheme can be determined as soon as possible to put into production. And reasonably predicting the macro index and the micro index of the blended coal by using the macro index database and the micro index database. The precipitation quality of the colloidal body is ensured through the continuity of the coal bonding index, the thickness of the colloidal layer and the reflectivity distribution of the vitrinite, the coke quality is reasonably deduced, a coal blending scheme is determined, and the coke quality after the test meets the requirements and can be put into production. In addition, the time cost can be reduced under the condition of not influencing the coke quality, the coke with higher quality can be produced by utilizing the saved time test, and the output value is improved.
(2) And (5) predicting the properties of the blended coal. The indexes of the macroscopic index database, the microscopic index database and the physical coal blending part satisfy the linear addition relationship, so that the properties of blended coal can be predicted, or the quality of the blended coal can be evaluated. And along with data accumulation, the correlation between the coal type and the coke parameter can be researched by utilizing the coal type and the coke parameter, a certain formula model is established, and a coking mechanism is understood so as to be convenient for predicting the coke quality through the coal type parameter.
(3) A single coal evaluation can be performed. And comparing various indexes of the coal to be evaluated with the existing coal data by using a macroscopic and microscopic index database, judging the properties of the coal and evaluating the comprehensive value of the coal by combining the cost.
(4) Optimize the coal blending structure and reduce the coal blending cost. Because the traditional coal blending time period is long, the large change in the scheme bears great risk and is dare not to try easily. According to the rapid coal blending method, the problems of blended coal can be found while index prediction is carried out, theoretically, correction is carried out first, coal blending is guided theoretically, the blending proportion of single coal is adjusted, the coking result is not influenced under the condition that the use of main coking coal is reduced, even the coke quality is improved, the cost is reduced, and meanwhile, high-quality coking coal resources are protected. And the use of various coal types is ensured under the screening condition of vitrinite reflectance standard deviation, the use of coking coal can be reduced, and the coal blending cost is reduced.
A coal blending method according to some specific examples of the invention is described below with reference to the drawings.
Example 1:
traditional coal blending often tries multiple coal blending schemes at a time, and the scheme with the best coke quality is selected as a production scheme. In combination with the general actual working conditions of a coke-oven plant, taking the example that the coke-oven is charged in the afternoon of the day and the coke-oven is discharged in the morning of the next day, and a new round of coal blending is started in Monday, the time of the traditional coal blending method is summarized as follows:
and B, Monday: blank preparation is carried out, and preparation work of the first scheme is carried out at the same time.
And B, Tuesday: the blank is fired, and a small coke oven test of protocol one is performed, as well as preparation of protocol two.
And D, three weeks: coke discharging in the first scheme, coke oven test in the second scheme and coke quality detection in the first scheme.
B, B: discharging coke according to the scheme II, testing a coke oven according to the scheme III, and detecting the quality of the coke according to the scheme II.
Friday: and (4) coke discharging according to the third scheme and coke quality detection.
3-4 groups of coke oven tests are carried out in one week, so that each coal blending period needs about two weeks, a coal blending scheme is listed as shown in a table 1-1, and corresponding coke quality indexes are listed as shown in a table 1-2.
TABLE 1-1 conventional coal blending protocol
TABLE 1-2 coke quality index corresponding to coal blending scheme
The coke quality of the scheme four of the traditional coal blending method is the best through comparison, and the time response period from the coal blending scheme to the production putting is determined to be about nine days as a production scheme.
According to the rapid coal blending method provided by the embodiment of the invention, the index of blended coal of each scheme and the vitrinite reflectance distribution are determined, under the condition that both the index and the vitrinite reflectance distribution meet the requirements, the vitrinite reflectance distribution graph and the cost of each coal are compared, and the continuous coal blending scheme with relatively low cost closest to normal distribution is selected, wherein the vitrinite reflectance distribution of the five coal blending schemes is shown in fig. 2 to 6.
Wherein, the fertilizer and coke ratio of the scheme II, the scheme III and the scheme IV is relatively low, and the coking cost can be reduced. By observing the vitrinite reflectance distribution, the distribution of the third scheme and the fourth scheme is closer to normal distribution. The coal rock analysis results are shown in tables 1-3, and by combining the reflectivity distribution diagram, the vitrinite reflectivity distribution standard deviation of the scheme four is larger, the distribution ratio of the leftmost interval and the rightmost interval is larger, more low-price weak caking coal is used, and the distribution form ensures the continuous precipitation of the colloidal body, so the scheme four can be determined as the final coal blending scheme.
Table 1-3 scheme three, four coal rock analysis results
The rapid coal blending method can be used for determining a scheme from coal blending only in one day, testing the coke oven and detecting the coke quality in two days, and the coke indexes are proved to meet the production requirements and can be used as a production scheme. Thus, the time response period from coal blending to production is only three days and results in a coke meeting blast furnace requirements at a relatively low cost.
Example 2:
the theoretical coal blending scheme of the rapid coal blending method according to the embodiment of the invention is shown in the table 2-1, the vitrinite reflectance distribution diagram is shown in fig. 7, and the coke quality index is shown in the table 2-2.
TABLE 2-1 theoretical coal blending protocol
TABLE 2-2 theoretical quality index of coal blending coke
The inventor finds out through experiments that: the blending proportion of the main coking coal is large (the proportion of the fat coking coal is as high as 75 percent), the quality of the obtained coke is slightly poor (CRI: 26.57; CSR: 62.89), and the vitrinite reflectance distribution diagram 7 of the theoretical blending coal shows that the vitrinite reflectance is notched at 1.5, and the reflectance distribution diagram does not well present a normal distribution shape, so that the precipitation of colloidal substances in the heating process of the blending coal is not continuous and uniform. Therefore, a coal having a vitrinite reflectance of about 1.5 is sought, and the coal is classified into lean coke coal according to vitrinite reflectance.
Combining with the actual production situation, the vitrinite reflectance distribution of the white wall coal is between 0.90 and 1.90, the average value of the vitrinite reflectance is at 1.539, after the lean coking coal is added, a new coal blending scheme is formed and is shown in the table 2-3, the vitrinite reflectance distribution is shown in the figure 8, and the quality of the produced coke is shown in the table 2-4.
TABLE 2-3 addition of lean coking coal blending protocol
TABLE 2-4 Coke quality index for lean coking coal addition
The inventor finds through experiments that after the lean coking coal is added, the proportion of the main coking coal is reduced to 64 percent, and compared with the original scheme, the proportion is reduced by 11 percent. The price difference between the white wall-closed lean coking coal which is mixed with 20 percent of coal of about 900 yuan and the main coking coal is nearly 200 yuan, and the coal mixing cost of nearly 20 yuan is saved for each ton of mixed coal. And the hot strength of the coke is further improved to CRI 23.40 and CSR 66.92.
And because the coal blending structure changes, the adjusted coal blending structure is thin, and the coal blending cost is obviously reduced while the coke quality is improved. After the rapid coal blending method provided by the embodiment of the invention, the main coking coal blending ratio is reduced, and the coal blending structure adopts multi-blending weak caking coal to replace strong caking coal, so that the actual per-ton coking coal blending cost is reduced compared with the budget, and cost reduction and efficiency improvement are realized.
Example 3:
the results of the coal-to-coal ratio of the individual coals in the initial blended coal are shown in Table 3-1, and the results of the vitrinite reflectance distribution thereof are shown in FIG. 9. The quality index of coke produced from the blended coal is shown in Table 3-2.
TABLE 3-1 Single coal quality information Table of initial blending coal
TABLE 3-2 initial blending coal coke quality index
According to the rapid coal blending method provided by the embodiment of the invention, whether notches exist in the vitrinite reflectivity distribution is examined in the process of judging the quality of blended coal, and it can be seen from fig. 9 that notches exist in the whole vitrinite reflectivity distribution between 1.5 and 1.9, and lean coking coal is correspondingly added to supplement the notches. In addition, the projections distributed around 1.0 cause the distribution between 1.0 and 1.2 to have depressions and deviate from the normal distribution, correspondingly reducing the coal types with the maximum reflectivity of vitrinite on the left of the notches, and then blending the coal again. The results of coal blending are shown in tables 3-3, the distribution is shown in FIG. 10, and the corresponding coke quality indexes are shown in tables 3-4.
Table 3-3 single coal quality information table after correcting coal blending scheme
Tables 3-4 modified Coke quality index
Comparing tables 3-2 and 3-4, it can be found that the reactivity of the obtained coke is reduced, the strength after reaction is increased, the crushing strength is enhanced, the wear resistance is improved, and the coal blending cost can be reduced by adding the lean coking coal after the application of the rapid coal blending method of the embodiment of the invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (9)
1. A rapid coal blending method is characterized by comprising the following steps:
establishing a macro index database, wherein the macro index database comprises a plurality of single coal indexes;
establishing a microscopic index database, wherein the microscopic index database comprises vitrinite reflectivity indexes of the single coal;
generating a plurality of groups of coal blending schemes, and predicting the coal blending macro indexes of each scheme through each single coal index in the macro index database;
measuring vitrinite reflectance indexes of various coals in the blended coal through the microscopic index database to obtain vitrinite reflectance distribution of various coals in the blended coal of various schemes;
superposing vitrinite reflectance distribution maps of all the coal types in the blended coal according to the coal type proportion of the blended coal to obtain a total vitrinite reflectance distribution map of the blended coal of each scheme;
when the total vitrinite reflectance distribution diagram is in continuous non-concave normal distribution and the standard deviation is larger than a preset standard difference value, outputting a coal blending scheme of the blended coal, when the total vitrinite reflectance distribution diagram is not in continuous non-concave normal distribution, adjusting the proportion of various coal types in the blended coal, and repeating the steps until the total vitrinite reflectance distribution diagram is in continuous non-concave normal distribution approximately;
and comparing all indexes of the output coal blending scheme, selecting an optimal coal blending scheme for coke property determination by combining cost factors, and taking the coal blending scheme of the mixed coal as a production scheme when the coke quality of the mixed coal meets the coke quality index.
2. The rapid coal blending method according to claim 1, wherein the coke property determination is performed on the blended coal of the optimal coal blending scheme, and when the coke quality of the blended coal meets the coke quality index, the coal blending scheme of the blended coal is taken as a production scheme, and the method comprises the following steps:
crushing, mixing and humidifying various coals of the optimal coal blending scheme;
performing a coke oven test on the blended coal;
and measuring the quality of the coke after the mixed coal is coked, and taking the coal blending scheme of the mixed coal as a production scheme when the quality of the coke meets the coke quality index.
3. The rapid coal blending method according to claim 1, further comprising the steps of:
inputting the production scheme and the coke quality index into the macro index database;
and establishing a mathematical model of each index in the macro index database and each index in the micro index database to predict the coke quality of the mixed coal.
4. The rapid coal blending method according to claim 1, wherein the coke quality indicators include an ash indicator, a volatile matter indicator, a moisture indicator, a fixed carbon indicator, a sulfur indicator, a caking index, a colloidal layer index, and a cost.
5. The rapid coal blending method according to claim 2, wherein the content of the blended coal in the coke oven test is 40kg to 200 kg.
6. The rapid coal blending method according to claim 1, wherein the single coal species comprises gas coal, 1/3 coking coal, fat one, fat two, coke one, coke two, lean coking coal, lean coal and lean coal.
7. The rapid coal blending method according to claim 1, wherein the vitrinite reflectance indicators include vitrinite reflectance distribution, vitrinite average reflectance, and vitrinite maximum reflectance.
8. The rapid coal blending method according to claim 1, wherein the preset standard deviation value is 0.2.
9. The method of claim 1, wherein when the reflectance profile of total vitrinite is not continuously normal without concavities, the addition of vitrinite maximum reflectance is to reduce the coal at the notch or to the left or right of the notch.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113109353A (en) * | 2021-04-07 | 2021-07-13 | 山西太钢不锈钢股份有限公司 | Method for distinguishing notch in coking coal vitrinite reflectivity distribution diagram |
| CN113684048A (en) * | 2021-08-19 | 2021-11-23 | 首钢集团有限公司 | Coking coal blending method, coal blending system and industrial control equipment |
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