New coal-rock blending method and device

Abstract

The present application proposes a novel coal-rock blending method, comprising: conducting coal rock analysis, Gibbsian fluidity analysis, and conventional component determination on each single type of coking coal to form a basic coal quality database; conducting pyrolysis experiments on each single type of coal to prepare semi-coke, and determining the semi-coke to form a pyrolysis semi-coke petrographic database; generating an initial coal blending scheme based on the constructed database, and conducting pyrolysis experiments on the generated mixed coal to prepare mixed coal semi-coke; determining the microscopic composition of the semi-coke and judging whether it meets the requirements; if not, regenerating the coal blending scheme and judging again; using the final coal blending scheme as a test coke oven coal blending scheme, and conducting a coke oven experiment on the generated mixed coal to evaluate whether the mixed coal meets the production requirements; if not, regenerating the coal blending scheme and re-judging to obtain the final target coal blending scheme. The present invention using the above scheme can scientifically guide the proportion of each single type of coking coal in the blended coal.

Description

Technical Field

[0001] The present application relates to the field of coking technology, and in particular to a novel coal-rock blending method and device. Background Art

[0002] Currently, when using coking coal, fat coal, gas coal, 1 / 3 coking coal, lean coal, and weakly coking coal for coking, the main coal blending methods used include empirical blending, key indicator-based blending, and coal-rock blending. The empirical blending method, based on practical production experience and validated by laboratory-scale coking trials and industrial tests, controls key coking coal blending parameters such as ash, volatile matter, bonding index, and colloidal layer index within reasonable ranges. This is used to predict and control coke quality and guide daily coking coal blending. An upgrade to empirical blending, the key indicator-based blending method, such as the V-MF method and the VG method, aims to control key coking coal blending parameters within reasonable ranges. With the increasing prevalence of mixed coal in the domestic coking coal market, the quality of coking coal has become extremely complex. Conventional empirical blending or key indicator-based blending methods are clearly no longer able to accurately control the blended coal structure to improve coke quality. Currently, the coal-rock blending method is the most widely used. Internationally, there are the Amosov and Shapiro method, the Thomson method, the Miyazu Takashi method, the Reed method, the Ven-Kleveren method, and the Gainey method. Some domestic coking plants have also developed different coal-rock blending methods. The invention patent "A coal petrological coal blending method" (CN101294948B) discloses a coal petrological coal blending method, which requires that the coke coke coarse-grained mosaic component is greater than 33%, the inert component is 20-27%, and the isotropic structural component is less than 6%, etc., so as to obtain a suitable coal blending ratio. The invention patent "A coal-rock blending method suitable for ramming coking" (CN102816577B) discloses a coal-rock blending method suitable for ramming coking, which calculates the active-inert ratio through coal rock testing, and blends according to the active-inert ratio of a single coal, the maximum average reflectance of the vitrinite group, and the random reflectance distribution ratio of the vitrinite group, with the ultimate goal of making the active-inert ratio and the vitrinite random reflectance distribution histogram of the coal continuous. The invention patent "A method for blending coal using the vitrinite reflectance of coking coal as the main indicator" (CN105316017B) discloses a method for blending coal using the vitrinite reflectance of coking coal as the main indicator. The method subdivides the average maximum reflectance range of the vitrinite of a single type of coking coal between 0.5 and 2.5 into 8 segments, superimposes the vitrinite reflectance distribution diagrams in the coal to form a vitrinite reflectance distribution diagram of the blended coal, and selects the vitrinite reflectance closest to the normal distribution to determine the required coal type and optimal blending ratio. The invention patent "A method for controlling the stable coking properties of coal blending production" (CN109423317B) discloses a method for controlling the stable coking properties of coal blending production by calculating the content of organic inerts in the coal rock composition of the blended coal to achieve the purpose of stabilizing the coking properties of the blended coal.The invention patent "Method for Blending High-Metamorphic Coking Coal for Coking" (CN104312607B) specifies the average maximum reflectance of the vitrinite of high-metamorphic coking coal and other coking coals, calculates the proportion of the range, measures the microscopic composition of the individual coal species, and calculates the inertinite content. Coal blending is achieved by quantifying the range of these indicators. In summary, the main coal petrological indicators currently used in coal blending methods include vitrinite random reflectance, average maximum reflectance of vitrinite, microscopic composition of vitrinite and inertinite, active-inertinite ratio, and vitrinite reflectance distribution.

[0003] The coal rock blending methods involved in the above-mentioned invention patents are all centered around a single type of coal or blended coal for coking. The coal rock indicators used are mainly vitrinite reflectance, vitrinite reflectance distribution diagram, vitrinite content, inertinite content, activity-inertin ratio, etc. These coal rock indicators can characterize the microscopic composition characteristics of coking coal, but cannot predict or reveal how it changes during the thermal conversion process. There are certain limitations in using the above-mentioned indicators to control the quality of coke. It is impossible to accurately determine whether the microscopic composition of coking coal is active, nor can it predict the impact on the quality of coke during the coking process. Summary of the Invention

[0004] The present application aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, the first purpose of this application is to propose a new coal-rock blending method, which solves the technical problems that the existing methods cannot accurately determine whether the microscopic composition of coking coal is active, and cannot predict the impact on the quality of coke during the coking process, and can scientifically guide the proportion of each single coking coal in the blended coal.

[0006] The second purpose of this application is to propose a new type of coal-rock blending device.

[0007] To achieve the above-mentioned purpose, the first embodiment of the present application proposes a new coal-rock blending method, comprising: performing coal rock analysis and Gibbs fluidity analysis on each selected single coal type for coking, and measuring the conventional components of the single coal type to obtain a first analysis result, a second analysis result and a measurement result; forming a basic coal quality database based on the first analysis result, the second analysis result and the measurement result; performing pyrolysis experiments on each selected single coal type for coking as raw material to prepare pyrolysis semi-coke, and measuring the prepared pyrolysis semi-coke based on the coal rock analysis method to form a pyrolysis semi-coke petrographic database; deriving each coal type required for blending and the corresponding coal blending ratio based on the pyrolysis semi-coke petrographic database and the basic coal quality database, and using it as an initial coal blending scheme; blending the blended coal according to the coal types and blending ratios selected in the initial coal blending scheme, and thermally blending the generated mixed coal The invention relates to a method for preparing pyrolysis coke of mixed coal by conducting a decomposition experiment; determining the microscopic composition of the pyrolysis coke of the mixed coal based on coal rock analysis, and judging whether the intermediate melt content of the pyrolysis coke of the mixed coal meets the requirements based on the determination results; if not, regenerating the initial coal blending scheme based on the constructed database, and rejudging the intermediate melt content of the pyrolysis coke of the mixed coal obtained by the initial coal blending scheme until the requirements are met, and using the initial coal blending scheme at this time as the experimental coke oven coal blending scheme; conducting a coke oven experiment on the mixed coal generated according to the experimental coke oven coal blending scheme, and evaluating whether various indicators of the mixed coal meet the production requirements; if not, regenerating the initial coal blending scheme and the experimental coke oven coal blending scheme based on the constructed database, and rejudging until various indicators of the mixed coal meet the production requirements, and using the coal blending structure at this time as the coal blending scheme for industrial production site.

[0008] The novel coal-rock blending method of the embodiment of the present application performs a pyrolysis reaction on a single type of coal for coking, and prepares a pyrolysis semi-coke sample at the end of its second pyrolysis stage or at a temperature corresponding to the Gibbs fluidity solidification temperature. The microscopic composition of the pyrolysis semi-coke sample is analyzed by coal rock, and the degree of fusion of active components such as vitrinite and exinite with inert components after softening and melting is determined, thereby guiding the proportion of each single type of coking coal in the blended coal.

[0009] Optionally, in one embodiment of the present application, each single type of coal for coking includes conventional bituminous coal for coking, low metamorphic coal, high metamorphic coal and other mixed coal types, the first analysis result includes the vitrinite, inertinite, exinite and mineral content of each single type of coal for coking, the second analysis result includes the solidification temperature of each single type of coal for coking, and the conventional components include volatile matter, ash, sulfur and moisture of each single type of coal for coking.

[0010] Optionally, in one embodiment of the present application, the pyrolysis experiment is an experiment under a reducing atmosphere, the pyrolysis heating rate of the pyrolysis experiment is controlled at 3°C / min-5°C / min, and the final temperature of the pyrolysis experiment is set according to the Gibbs fluidity solidification temperature of a single type of coal used for coking.

[0011] Optionally, in one embodiment of the present application, the prepared pyrolysis semi-coke is measured based on a coal petrographic analysis method to form a pyrolysis semi-coke petrographic database, including:

[0012] Based on the coal petrographic analysis method, the contents of vitrinite, inertinite, exinite, minerals, intermediate melt and pores in the semi-coke were measured to obtain the semi-coke measurement results;

[0013] Based on the measurement results of semi-coke, a pyrolysis semi-coke petrographic database corresponding to a single type of coal used for coking is formed, wherein the intermediate melt content of the coking coal samples in the pyrolysis semi-coke petrographic database ranges from 30% to 80%, the intermediate melt content of 1 / 3 coking coal ranges from 5% to 40%, the intermediate melt content of fat coal ranges from 20% to 60%, the intermediate melt content of gas coal ranges from 5% to 10%, and the intermediate melt content of lean coal ranges from 10% to 50%.

[0014] Optionally, in one embodiment of the present application, the various coal types and corresponding coal blending ratios required for coal blending are obtained based on the pyrolysis semi-coke petrographic database and the basic coal quality database, including:

[0015] According to the composition index of the blended coal and the additivity principle, the preliminary single coal types for coking are determined from the basic coal quality database, and the preliminary blending ratio of each single coal type is calculated;

[0016] Pyrolysis experiments were conducted on each of the above single coal types to prepare pyrolysis semi-cokes of different coal types, and the intermediate melt content of each pyrolysis semi-coke was determined based on the coal petrographic analysis method;

[0017] The intermediate melt content of each of the above-mentioned pyrolysis semi-cokes is compared with the pyrolysis semi-coke lithofacies database. If the intermediate melt content of a semi-coke sample does not meet the corresponding index requirements, a new coal sample is selected from the basic coal quality database and the above steps are repeated until the requirements for the intermediate melt content of the coke corresponding to the blending coal are met, thus completing the selection of coal type and the calculation of the coal blending ratio.

[0018] To achieve the above-mentioned purpose, the second embodiment of the present invention proposes a new coal-rock coal blending device, including an analysis module, a first database generation module, a second database generation module, a mixed coal scheme generation module, a mixed coal generation module, a first mixed coal evaluation module, and a second mixed coal evaluation module, wherein:

[0019] An analysis module is used to perform coal petrography analysis and Gibbs fluidity analysis on each selected single type of coal for coking, and to measure the conventional components of the single type of coal to obtain a first analysis result, a second analysis result, and a measurement result;

[0020] A first database generating module, configured to form a basic coal quality database based on the first analysis result, the second analysis result and the measurement result;

[0021] The second database generation module is used to conduct pyrolysis experiments using the selected single type of coking coal as raw material to prepare pyrolytic semi-coke, and to measure the prepared pyrolytic semi-coke based on coal petrographic analysis methods to form a pyrolytic semi-coke petrographic database;

[0022] The coal blending scheme generation module is used to obtain the various coal types and corresponding coal blending ratios required for coal blending based on the pyrolysis semi-coke lithofacies database and the basic coal quality database, and use them as the initial coal blending scheme;

[0023] The mixed coal generation module is used to blend the mixed coal according to the coal types and proportions selected in the initial coal blending plan, and to perform pyrolysis experiments on the generated mixed coal to prepare pyrolysis semi-coke of the mixed coal;

[0024] The mixed coal generation module is used to determine the microscopic composition of the mixed coal pyrolysis semi-coke based on coal rock analysis, and judge whether the intermediate melt content of the mixed coal pyrolysis semi-coke meets the requirements based on the measurement results. If not, the initial coal blending scheme is regenerated based on the constructed database, and the intermediate melt content of the mixed coal pyrolysis semi-coke obtained by the initial coal blending scheme is re-judged until it meets the requirements. The initial coal blending scheme at this time is used as the test coke oven coal blending scheme;

[0025] The second mixed coal evaluation module is used to conduct coke oven experiments on the mixed coal generated according to the experimental coke oven coal blending plan to evaluate whether the various indicators of the mixed coal meet the production requirements. If not, the initial coal blending plan and the experimental coke oven coal blending plan are regenerated based on the constructed database, and re-judgment is made until the various indicators of the mixed coal meet the production requirements. The coal blending structure at this time is used as the coal blending plan for industrial production sites.

[0026] Optionally, in one embodiment of the present application, each single type of coal for coking includes conventional bituminous coal for coking, low metamorphic coal, high metamorphic coal and other mixed coal types, the first analysis result includes the vitrinite, inertinite, exinite and mineral content of each single type of coal for coking, the second analysis result includes the solidification temperature of each single type of coal for coking, and the conventional components include volatile matter, ash, sulfur and moisture of each single type of coal for coking.

[0027] Optionally, in one embodiment of the present application, the pyrolysis experiment is an experiment under a reducing atmosphere, the pyrolysis heating rate of the pyrolysis experiment is controlled at 3°C / min-5°C / min, and the final temperature of the pyrolysis experiment is set according to the Gibbs fluidity solidification temperature of a single type of coal used for coking.

[0028] Optionally, in one embodiment of the present application, the prepared pyrolysis semi-coke is measured based on a coal petrographic analysis method to form a pyrolysis semi-coke petrographic database, including:

[0029] Based on the coal petrographic analysis method, the contents of vitrinite, inertinite, exinite, minerals, intermediate melt and pores in the semi-coke were measured to obtain the semi-coke measurement results;

[0030] Based on the measurement results of semi-coke, a pyrolysis semi-coke petrographic database corresponding to a single type of coal used for coking is formed, wherein the intermediate melt content of the coking coal samples in the pyrolysis semi-coke petrographic database ranges from 30% to 80%, the intermediate melt content of 1 / 3 coking coal ranges from 5% to 40%, the intermediate melt content of fat coal ranges from 20% to 60%, the intermediate melt content of gas coal ranges from 5% to 10%, and the intermediate melt content of lean coal ranges from 10% to 50%.

[0031] Optionally, in one embodiment of the present application, the various coal types and corresponding coal blending ratios required for coal blending are obtained based on the pyrolysis semi-coke petrographic database and the basic coal quality database, including:

[0032] According to the composition index of the blended coal and the additivity principle, the preliminary single coal types for coking are determined from the basic coal quality database, and the preliminary blending ratio of each single coal type is calculated;

[0033] Pyrolysis experiments were conducted on each of the above single coal types to prepare pyrolysis semi-cokes of different coal types, and the intermediate melt content of each pyrolysis semi-coke was determined based on the coal petrographic analysis method;

[0034] The intermediate melt content of each of the above-mentioned pyrolysis semi-cokes is compared with the pyrolysis semi-coke lithofacies database. If the intermediate melt content of a semi-coke sample does not meet the corresponding index requirements, a new coal sample is selected from the basic coal quality database and the above steps are repeated until the requirements for the intermediate melt content of the coke corresponding to the blending coal are met, thus completing the selection of coal type and the calculation of the coal blending ratio.

[0035] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0037] Figure 1 A schematic flow chart of a novel coal-rock blending method provided in Example 1 of the present application;

[0038] Figure 2 This is an example diagram of a new coal-rock blending method according to an embodiment of the present application;

[0039] Figure 3 A schematic structural diagram of a novel coal-rock blending device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0040] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0041] The following describes the novel coal-rock blending method and device according to the embodiments of the present application with reference to the accompanying drawings.

[0042] Figure 1 This is a flow chart of a new coal-rock blending method provided in Example 1 of the present application.

[0043] like Figure 1 As shown, the novel coal-rock blending method comprises the following steps:

[0044] Step 101: performing coal petrography analysis and Gibbs fluidity analysis on each selected single type of coal for coking, and measuring conventional components of the single type of coal to obtain a first analysis result, a second analysis result, and a measurement result;

[0045] Step 102: forming a basic coal quality database based on the first analysis result, the second analysis result, and the measurement result;

[0046] Step 103: Conducting pyrolysis experiments using the selected single type of coking coal as raw material to prepare pyrolytic semi-coke, and measuring the prepared pyrolytic semi-coke based on coal petrographic analysis methods to form a pyrolytic semi-coke petrographic database;

[0047] Step 104: derive the coal types and corresponding coal blending ratios required for coal blending based on the pyrolysis semi-coke lithofacies database and the basic coal quality database, and use them as the initial coal blending plan;

[0048] Step 105: blending the mixed coal according to the coal types and proportions selected in the initial coal blending plan, and conducting a pyrolysis experiment on the generated mixed coal to prepare pyrolysis semi-coke of the mixed coal;

[0049] Step 106: The microscopic composition of the mixed coal pyrolysis semi-coke is measured based on the coal petrographic analysis, and based on the measurement results, whether the intermediate melt content of the mixed coal pyrolysis semi-coke meets the requirements is determined. If not, an initial coal blending scheme is regenerated based on the constructed database, and the intermediate melt content of the mixed coal pyrolysis semi-coke obtained based on the initial coal blending scheme is re-determined until it meets the requirements. The initial coal blending scheme at this time is used as the test coke oven coal blending scheme;

[0050] Step 107, conduct a coke oven test on the mixed coal generated according to the experimental coke oven coal blending scheme to evaluate whether the various indicators of the mixed coal meet the production requirements. If not, regenerate the initial coal blending scheme and the experimental coke oven coal blending scheme based on the constructed database, and re-judge until the various indicators of the mixed coal meet the production requirements. The coal blending structure at this time is used as the coal blending scheme for industrial production sites.

[0051] Optionally, in one embodiment of the present application, each single type of coal for coking includes conventional bituminous coal for coking, low metamorphic coal, high metamorphic coal and other mixed coal types, the first analysis result includes the vitrinite, inertinite, exinite and mineral content of each single type of coal for coking, the second analysis result includes the solidification temperature of each single type of coal for coking, and the conventional components include volatile matter, ash, sulfur and moisture of each single type of coal for coking.

[0052] Optionally, in one embodiment of the present application, the pyrolysis experiment is an experiment under a reducing atmosphere, the pyrolysis heating rate of the pyrolysis experiment is controlled at 3°C / min-5°C / min, and the final temperature of the pyrolysis experiment is set according to the Gibbs fluidity solidification temperature of a single type of coal used for coking.

[0053] Optionally, in one embodiment of the present application, the prepared pyrolysis semi-coke is measured based on a coal petrographic analysis method to form a pyrolysis semi-coke petrographic database, including:

[0054] Based on the coal petrographic analysis method, the contents of vitrinite, inertinite, exinite, minerals, intermediate melt and pores in the semi-coke were measured to obtain the semi-coke measurement results;

[0055] Based on the measurement results of semi-coke, a pyrolysis semi-coke petrographic database corresponding to a single type of coal used for coking is formed, wherein the intermediate melt content of the coking coal samples in the pyrolysis semi-coke petrographic database ranges from 30% to 80%, the intermediate melt content of 1 / 3 coking coal ranges from 5% to 40%, the intermediate melt content of fat coal ranges from 20% to 60%, the intermediate melt content of gas coal ranges from 5% to 10%, and the intermediate melt content of lean coal ranges from 10% to 50%.

[0056] Optionally, in one embodiment of the present application, the various coal types and corresponding coal blending ratios required for coal blending are obtained based on the pyrolysis semi-coke petrographic database and the basic coal quality database, including:

[0057] According to the moisture, sulfur, ash, volatile matter and other indicators of the blended coal, and in accordance with the additivity principle, the preliminary single coal types for coking are determined from the basic coal quality database, and the preliminary coal blending ratio of each single coal type is calculated; pyrolysis experiments are carried out on the above-mentioned single coal types to prepare pyrolysis semi-cokes of different coal types, and the intermediate melt content of each pyrolysis semi-coke is determined based on the coal rock analysis method; the intermediate melt content of the above-mentioned pyrolysis semi-cokes is compared with the pyrolysis semi-coke lithofacies database. If the intermediate melt content of a semi-coke sample does not meet the corresponding indicator requirements, it is necessary to reselect the coal sample from the basic coal quality database, and repeat the above work until the requirements for the intermediate melt content of the coke corresponding to the coal type are met, and the coal type selection and coal blending ratio are completed.

[0058] Figure 2 This is an example diagram of the new coal-rock blending method according to the embodiment of the present application. Figure 2 As shown, the method includes the following steps:

[0059] (1) Conducting coal petrographic analysis on each selected single type of coking coal to determine the vitrinite, inertinite, exinite, and mineral content of each single type of coking coal; conducting Gibbs flow analysis on each selected single type of coking coal to determine the solidification temperature of each coal sample; and conducting conventional determinations of volatile matter, ash, sulfur, and moisture on the above single types of coal to form a basic coal quality database for the coal blending skeleton;

[0060] Specifically, the single coal type for coking described in step (1) is not limited to conventional bituminous coal for coking, but also includes low-grade coal, high-grade coal or other mixed coal types;

[0061] (2) using the selected single type of coking coal as raw material, a pyrolysis experiment is carried out in a reducing atmosphere such as nitrogen or argon using a crucible coke test apparatus or a fixed bed test apparatus, the pyrolysis heating rate is controlled at 3°C / min-5°C / min, the final temperature of the pyrolysis experiment is set according to the Gibbs fluidity solidification temperature of the single type of coking coal, and pyrolysis semi-coke of each single type of coking coal at its corresponding Gibbs fluidity solidification temperature is prepared;

[0062] Specifically, the final pyrolysis temperature in step (2) is not limited to the characteristic solidification temperature of Gibbs fluidity, and the pyrolysis temperature can also be specified in the range of 450°C to 600°C according to the coal pyrolysis mechanism or experience;

[0063] (3) Taking the semi-coke corresponding to each single type of coking coal obtained in step (2) as the object, based on the coal rock analysis method, the contents of vitrinite, inertinite, exinite, minerals, intermediate melt (a substance in which active components and inert components are fused and combined) and pores in the semi-coke are measured, and a petrographic database of pyrolytic semi-coke corresponding to the single type of coking coal is formed. Requirements: The intermediate melt content of coking coal samples ranges from 30% to 80%, the intermediate melt content of 1 / 3 coking coal ranges from 5% to 40%, the intermediate melt content of fat coal ranges from 20% to 60%, the intermediate melt content of gas coal ranges from 5% to 10%, and the intermediate melt content of lean coal ranges from 10% to 50%. Based on the intermediate melt content of the pyrolytic semi-coke obtained at the Gibbs fluidity solidification temperature of each single type of coking coal, combined with the basic coal quality database, the various coal types required for blending and the appropriate coal blending ratio are obtained, and this is used as the coal blending plan;

[0064] Specifically, the coal rock analysis described in step (3) is carried out with reference to GB / T 8899-2013 "Methods for determination of microscopic components and mineralogy of coal".

[0065] (4) Blending the mixed coal with the coal type and proportion selected in the coal blending scheme obtained in step (3); conducting a pyrolysis experiment according to the requirements of step (2), with the final temperature of the pyrolysis experiment set at 500°C to 550°C, and preparing pyrolysis semi-coke of the mixed coal at this temperature; determining the microscopic composition of the pyrolysis semi-coke based on coal rock analysis; if the intermediate melt content of the pyrolysis semi-coke of the mixed coal does not reach 40% to 60%, it is necessary to replace the coal type from the pyrolysis semi-coke petrographic database or adjust the proportion of the single coal type used for coking, and repeat the above steps until the intermediate melt content of the pyrolysis semi-coke of the mixed coal reaches 40% to 60%, and the coal blending structure at this time can be used as the experimental coke oven coal blending scheme;

[0066] (5) Based on the coal blending scheme determined in step (4), a test coke oven test is conducted to evaluate the hot strength, cold strength, and particle size distribution of the coke. If the coke's various indicators meet the production requirements, the coal blending scheme can be used as the coal blending scheme for industrial production sites. If the coke's various indicators do not meet the production requirements, steps (4) and (5) need to be repeated.

[0067] Specifically, the experimental coke oven test described in step (5) includes a 40 kg top-loaded experimental coke oven, a 40 kg tamping experimental coke oven, and other top-loaded or load-loaded experimental coke ovens of different sizes.

[0068] The second stage of thermal conversion of coking coal, that is, the stage of semi-coke formation, is an important stage for the formation and development of colloids. The quality of coke can be determined by analyzing its petrographic composition. Based on this, the present application establishes a new coal-rock blending method, in which a single type of coal for coking is subjected to pyrolysis reaction to prepare a pyrolysis semi-coke sample at the end of its second pyrolysis stage or at a temperature corresponding to the Gibbs fluidity solidification temperature. The microscopic composition of the pyrolysis semi-coke sample is analyzed by coal rock, and the degree of fusion of active components such as vitrinite and exinite with inert components after softening and melting is determined, thereby guiding the proportion of each single type of coking coal in the blended coal.

[0069] The new coal-rock blending method proposed in this application is different from the conventional coal-rock analysis method. It focuses on the characteristics of the lithology of coal samples during the thermal conversion process, and more truly and comprehensively reflects the relationship between microscopic composition and coke quality. Through the new coal-rock blending method proposed in this application, the microstructure and composition of a single type of coal used for coking during the thermal conversion process, especially in the formation and development stage of the colloid, can be mastered. At the same time, the coking characteristics of microscopic compositions such as vitrinite, exinite, inertinite and minerals can be directly measured, and the coke quality can be accurately predicted.

[0070] In order to implement the above embodiments, the present application also proposes a new type of coal-rock blending device.

[0071] Figure 3 A schematic structural diagram of a novel coal-rock blending device provided in an embodiment of the present application.

[0072] like Figure 3 As shown, the new coal-rock blending device includes an analysis module, a first database generation module, a second database generation module, a mixed coal scheme generation module, a mixed coal generation module, a first mixed coal evaluation module, and a second mixed coal evaluation module, wherein:

[0073] An analysis module is used to perform coal petrography analysis and Gibbs fluidity analysis on each selected single type of coal for coking, and to measure the conventional components of the single type of coal to obtain a first analysis result, a second analysis result, and a measurement result;

[0074] A first database generating module, configured to form a basic coal quality database based on the first analysis result, the second analysis result and the measurement result;

[0075] The second database generation module is used to conduct pyrolysis experiments using the selected single type of coking coal as raw material to prepare pyrolytic semi-coke, and to measure the prepared pyrolytic semi-coke based on coal petrographic analysis methods to form a pyrolytic semi-coke petrographic database;

[0076] The coal blending scheme generation module is used to obtain the various coal types and corresponding coal blending ratios required for coal blending based on the pyrolysis semi-coke lithofacies database and the basic coal quality database, and use them as the initial coal blending scheme;

[0077] The mixed coal generation module is used to blend the mixed coal according to the coal types and proportions selected in the initial coal blending plan, and to perform pyrolysis experiments on the generated mixed coal to prepare pyrolysis semi-coke of the mixed coal;

[0078] The mixed coal generation module is used to determine the microscopic composition of the mixed coal pyrolysis semi-coke based on coal rock analysis, and judge whether the intermediate melt content of the mixed coal pyrolysis semi-coke meets the requirements based on the measurement results. If not, the initial coal blending scheme is regenerated based on the constructed database, and the intermediate melt content of the mixed coal pyrolysis semi-coke obtained by the initial coal blending scheme is re-judged until it meets the requirements. The initial coal blending scheme at this time is used as the test coke oven coal blending scheme;

[0079] The second mixed coal evaluation module is used to conduct coke oven experiments on the mixed coal generated according to the experimental coke oven coal blending plan to evaluate whether the various indicators of the mixed coal meet the production requirements. If not, the initial coal blending plan and the experimental coke oven coal blending plan are regenerated based on the constructed database, and re-judgment is made until the various indicators of the mixed coal meet the production requirements. The coal blending structure at this time is used as the coal blending plan for industrial production sites.

[0080] Optionally, in one embodiment of the present application, each single type of coal for coking includes conventional bituminous coal for coking, low metamorphic coal, high metamorphic coal and other mixed coal types, the first analysis result includes the vitrinite, inertinite, exinite and mineral content of each single type of coal for coking, the second analysis result includes the solidification temperature of each single type of coal for coking, and the conventional components include volatile matter, ash, sulfur and moisture of each single type of coal for coking.

[0081] Optionally, in one embodiment of the present application, the pyrolysis experiment is an experiment under a reducing atmosphere, the pyrolysis heating rate of the pyrolysis experiment is controlled at 3°C / min-5°C / min, and the final temperature of the pyrolysis experiment is set according to the Gibbs fluidity solidification temperature of a single type of coal used for coking.

[0082] Optionally, in one embodiment of the present application, the prepared pyrolysis semi-coke is measured based on a coal petrographic analysis method to form a pyrolysis semi-coke petrographic database, including:

[0083] Based on the coal petrographic analysis method, the contents of vitrinite, inertinite, exinite, minerals, intermediate melt and pores in the semi-coke were measured to obtain the semi-coke measurement results;

[0084] Based on the measurement results of semi-coke, a pyrolysis semi-coke petrographic database corresponding to a single type of coal used for coking is formed, wherein the intermediate melt content of the coking coal samples in the pyrolysis semi-coke petrographic database ranges from 30% to 80%, the intermediate melt content of 1 / 3 coking coal ranges from 5% to 40%, the intermediate melt content of fat coal ranges from 20% to 60%, the intermediate melt content of gas coal ranges from 5% to 10%, and the intermediate melt content of lean coal ranges from 10% to 50%.

[0085] Optionally, in one embodiment of the present application, the various coal types and corresponding coal blending ratios required for coal blending are obtained based on the pyrolysis semi-coke petrographic database and the basic coal quality database, including:

[0086] According to the composition index of the blended coal and the additivity principle, the preliminary single coal types for coking are determined from the basic coal quality database, and the preliminary blending ratio of each single coal type is calculated;

[0087] Pyrolysis experiments were conducted on each of the above single coal types to prepare pyrolysis semi-cokes of different coal types, and the intermediate melt content of each pyrolysis semi-coke was determined based on the coal petrographic analysis method;

[0088] The intermediate melt content of each of the above-mentioned pyrolysis semi-cokes is compared with the pyrolysis semi-coke lithofacies database. If the intermediate melt content of a semi-coke sample does not meet the corresponding index requirements, a new coal sample is selected from the basic coal quality database and the above steps are repeated until the requirements for the intermediate melt content of the coke corresponding to the blending coal are met, thus completing the selection of coal type and the calculation of the coal blending ratio.

[0089] It should be noted that the above explanation of the embodiment of the new coal-rock coal blending method is also applicable to the new coal-rock coal blending device of this embodiment, and will not be repeated here.

[0090] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0091] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0092] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present application belong.

[0093] The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection with one or more wires (electronic devices), a portable computer disk cartridge (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and a portable compact disc read-only memory (CDROM). Furthermore, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing it in another suitable manner if necessary, and then storing it in a computer memory.

[0094] It should be understood that various parts of the present application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used to implement: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0095] Those skilled in the art will understand that all or part of the steps in the method of the above embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

[0096] In addition, the functional units in the various embodiments of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into a module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0097] The storage medium mentioned above may be a read-only memory, a magnetic disk, or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application. Persons skilled in the art may make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A new coal-rock blending method, characterized in that: The following steps are involved: Conducting coal petrography and Gibbs fluidity analysis on each selected single type of coal for coking, and measuring conventional components of the single type of coal to obtain a first analysis result, a second analysis result, and a measurement result; forming a basic coal quality database based on the first analysis result, the second analysis result, and the measurement result; Pyrolysis experiments were conducted using each selected single type of coking coal as raw material to produce pyrolytic semi-coke. The prepared pyrolytic semi-coke was then measured based on coal petrographic analysis methods to form a pyrolytic semi-coke petrographic database. Determine the coal types and corresponding coal blending ratios required for coal blending based on the pyrolysis semi-coke petrographic database and the basic coal quality database, and use them as an initial coal blending plan; Blending the mixed coal according to the coal types and proportions selected in the initial coal blending scheme, and performing the pyrolysis experiment on the generated mixed coal to prepare pyrolysis semi-coke of the mixed coal; The microscopic composition of the mixed coal pyrolysis semi-coke is determined based on coal petrographic analysis, and the intermediate melt content of the mixed coal pyrolysis semi-coke is judged based on the determination results to determine whether it meets the requirements. If not, an initial coal blending scheme is regenerated based on the constructed database, and the intermediate melt content of the mixed coal pyrolysis semi-coke obtained from the initial coal blending scheme is re-judged until it meets the requirements. The initial coal blending scheme at this time is used as the test coke oven coal blending scheme; A coke oven experiment is conducted on the mixed coal generated according to the experimental coke oven coal blending scheme to evaluate whether the various indicators of the mixed coal meet the production requirements. If not, the initial coal blending scheme and the experimental coke oven coal blending scheme are regenerated based on the constructed database, and re-judgment is performed until the various indicators of the mixed coal meet the production requirements. The coal blending structure at this time is used as the coal blending scheme for industrial production sites.

2. The method according to claim 1, wherein The single types of coal used for coking include conventional bituminous coal, low-metamorphic coal, high-metamorphic coal and other mixed coal types. The first analysis results include the vitrinite, inertinite, exinite and mineral content of each single type of coal used for coking. The second analysis results include the solidification temperature of each single type of coal used for coking. The conventional components include the volatile matter, ash, sulfur and moisture of each single type of coal used for coking.

3. The method according to claim 2, wherein The pyrolysis experiment is conducted under a reducing atmosphere. The pyrolysis heating rate of the pyrolysis experiment is controlled at 3°C / min-5°C / min. The final temperature of the pyrolysis experiment is set according to the Gibbs fluidity solidification temperature of a single type of coal used for coking.

4. The method according to claim 3, wherein The prepared pyrolysis semi-coke is measured based on the coal petrographic analysis method to form a pyrolysis semi-coke petrographic database, including: Based on the coal petrographic analysis method, the contents of vitrinite, inertinite, exinite, minerals, intermediate melt and pores in the semi-coke were measured to obtain the semi-coke measurement results; Based on the measurement results of semi-coke, a pyrolysis semi-coke petrographic database corresponding to a single type of coal used for coking is formed, wherein the intermediate melt content of the coking coal samples in the pyrolysis semi-coke petrographic database ranges from 30% to 80%, the intermediate melt content of 1 / 3 coking coal ranges from 5% to 40%, the intermediate melt content of fat coal ranges from 20% to 60%, the intermediate melt content of gas coal ranges from 5% to 10%, and the intermediate melt content of lean coal ranges from 10% to 50%.

5. The method according to claim 4, wherein The method of obtaining the various coal types and corresponding coal blending ratios required for coal blending based on the pyrolysis semi-coke petrographic database and the basic coal quality database includes: According to the component index of the blended coal and the additivity principle, preliminary single coal types for coking are determined from the basic coal quality database, and the preliminary blending ratio of each single coal type is calculated; Pyrolysis experiments were conducted on each of the above single coal types to prepare pyrolysis semi-cokes of different coal types, and the intermediate melt content of each pyrolysis semi-coke was determined based on the coal petrographic analysis method; The intermediate melt content of each of the above-mentioned pyrolysis semi-cokes is compared with the pyrolysis semi-coke lithofacies database. If the intermediate melt content of a semi-coke sample does not meet the corresponding index requirements, a new coal sample is selected from the basic coal quality database and the above steps are repeated until the requirements for the intermediate melt content of the coke corresponding to the blending coal are met, thus completing the selection of coal type and the calculation of the coal blending ratio.

6. A new type of coal-rock blending device, characterized in that: It includes an analysis module, a first database generation module, a second database generation module, a mixed coal scheme generation module, a mixed coal generation module, a first mixed coal evaluation module, and a second mixed coal evaluation module, wherein: The analysis module is used to perform coal petrography analysis and Gibbs fluidity analysis on each selected single type of coal for coking, and to measure the conventional components of the single type of coal to obtain a first analysis result, a second analysis result, and a measurement result; The first database generating module is configured to form a basic coal quality database based on the first analysis result, the second analysis result and the measurement result; The second database generation module is configured to conduct pyrolysis experiments using each selected single type of coking coal as a raw material to prepare pyrolytic semi-coke, and to measure the prepared pyrolytic semi-coke based on a coal petrographic analysis method to form a pyrolytic semi-coke petrographic database; The coal blending scheme generating module is used to obtain the various coal types and corresponding coal blending ratios required for coal blending based on the pyrolysis semi-coke petrographic database and the basic coal quality database, and use them as the initial coal blending scheme; The mixed coal generation module is used to blend the mixed coal according to the coal types and proportions selected in the initial coal blending plan, and perform the pyrolysis experiment on the generated mixed coal to prepare pyrolysis semi-coke of the mixed coal; The mixed coal generation module is used to determine the microscopic composition of the mixed coal pyrolysis semi-coke based on coal rock analysis, and determine whether the intermediate melt content of the mixed coal pyrolysis semi-coke meets the requirements based on the determination results. If the requirements are not met, an initial coal blending scheme is regenerated based on the constructed database, and the intermediate melt content of the mixed coal pyrolysis semi-coke obtained by the initial coal blending scheme is re-determined until the requirements are met, and the initial coal blending scheme at this time is used as the test coke oven coal blending scheme; The second mixed coal evaluation module is used to conduct coke oven experiments on the mixed coal generated according to the experimental coke oven coal blending scheme to evaluate whether the various indicators of the mixed coal meet the production requirements. If not, the initial coal blending scheme and the experimental coke oven coal blending scheme are regenerated based on the constructed database, and re-judgment is performed until the various indicators of the mixed coal meet the production requirements. The coal blending structure at this time is used as the coal blending scheme for industrial production sites.

7. The device according to claim 6, characterized in that The single types of coal used for coking include conventional bituminous coal, low-metamorphic coal, high-metamorphic coal and other mixed coal types. The first analysis results include the vitrinite, inertinite, exinite and mineral content of each single type of coal used for coking. The second analysis results include the solidification temperature of each single type of coal used for coking. The conventional components include the volatile matter, ash, sulfur and moisture of each single type of coal used for coking.

8. The device according to claim 7, characterized in that The pyrolysis experiment is conducted under a reducing atmosphere. The pyrolysis heating rate of the pyrolysis experiment is controlled at 3°C / min-5°C / min. The final temperature of the pyrolysis experiment is set according to the Gibbs fluidity solidification temperature of a single type of coal used for coking.

9. The device according to claim 8, wherein The prepared pyrolysis semi-coke is measured based on the coal petrographic analysis method to form a pyrolysis semi-coke petrographic database, including: Based on the coal petrographic analysis method, the contents of vitrinite, inertinite, exinite, minerals, intermediate melt and pores in the semi-coke were measured to obtain the semi-coke measurement results; Based on the measurement results of semi-coke, a pyrolysis semi-coke petrographic database corresponding to a single type of coal used for coking is formed, wherein the intermediate melt content of the coking coal samples in the pyrolysis semi-coke petrographic database ranges from 30% to 80%, the intermediate melt content of 1 / 3 coking coal ranges from 5% to 40%, the intermediate melt content of fat coal ranges from 20% to 60%, the intermediate melt content of gas coal ranges from 5% to 10%, and the intermediate melt content of lean coal ranges from 10% to 50%.

10. The device according to claim 9, wherein The method of obtaining the various coal types and corresponding coal blending ratios required for coal blending based on the pyrolysis semi-coke petrographic database and the basic coal quality database includes: According to the component index of the blended coal and the additivity principle, preliminary single coal types for coking are determined from the basic coal quality database, and the preliminary blending ratio of each single coal type is calculated; Pyrolysis experiments were conducted on each of the above single coal types to prepare pyrolysis semi-cokes of different coal types, and the intermediate melt content of each pyrolysis semi-coke was determined based on the coal petrographic analysis method; The intermediate melt content of each of the above-mentioned pyrolysis semi-cokes is compared with the pyrolysis semi-coke lithofacies database. If the intermediate melt content of a semi-coke sample does not meet the corresponding index requirements, a new coal sample is selected from the basic coal quality database and the above steps are repeated until the requirements for the intermediate melt content of the coke corresponding to the blending coal are met, thus completing the selection of coal type and the calculation of the coal blending ratio.

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