Coking method for optimizing coking coal proportion

Abstract

The invention relates to the field of coking, in particular to a coking method for optimizing the proportion of coking coal. The coking method comprises the following steps: screening a plurality of types of coking coals to obtain fine-particle-size coal samples; wherein the particle size of the fine-fraction coal sample is less than or equal to 3mm; counting the ratio Q of the mass of the fine-particle-size coal sample to the mass of the coking coal; determining the ratio of different types of coking coal according to the value of the ratio Q; mixing the coking coal according to the proportion to obtain a coking coal mixture; and coking the coking coal mixture to obtain coke. According to the coking method, the single-hole coal loading quantity of the coking coal can be increased by 0.76% through screening treatment and accurate proportion control of the mass ratio Q of the fine-fraction coal sample to the coking coal, and the coke quality is basically kept stable.

Description

Technical Field

[0001] The present application relates to the field of coking, and in particular to a coking method for optimizing the proportion of coking coal. Background Art

[0002] One of the important factors for increasing the production and reducing the consumption of large blast furnaces is to increase the coke output and stabilize the coke quality. However, the particle size distribution of coking coal affects the output of the coke oven and the quality of the coke oven products. In addition, coking coal is generally formed by blending multiple types of coking coal. However, a single type of coking coal is affected by factors such as the coal-forming environment and coal-forming conditions, resulting in large differences in the hardness of different types of coking coal. In order to increase the single-furnace output of the coke oven, the fineness of these coking coals can be reduced to increase the coal pile density of the furnace, but different types of coking coal will deteriorate the quality of the coke.

[0003] In order to solve the problem of hardness difference of coking coal, graded crushing can be used to adjust the fineness of different types of coking coal. However, the graded crushing method requires upgrading the coking production process, which will increase the equipment investment of the coking production process. In addition, the graded crushing method will form a large amount of fine coking coal, which will cause coke loss in the coking process and affect the coke output of the coking production process. Summary of the invention

[0004] The present application provides a coking method for optimizing the coking coal ratio to solve the following technical problem: how to increase the output of coking products while reducing the coking cost.

[0005] In a first aspect, an embodiment of the present application provides a coking method for optimizing the proportion of coking coal, the coking method comprising:

[0006] Screening multiple types of coking coal to obtain fine-grained coal samples; wherein the particle size of the fine-grained coal samples is ≤3 mm;

[0007] Calculating a ratio Q of the mass of the fine-grained coal sample to the mass of the coking coal;

[0008] Determining the proportion of different types of coking coal according to the ratio Q;

[0009] According to the ratio, the coking coal is mixed to obtain a coking coal mixture;

[0010] The coking coal mixture is coked to obtain coke.

[0011] Optionally, determining the proportion of different types of coking coal according to the ratio Q comprises the following steps:

[0012] If the ratio Q satisfies: 0.80<Q≤0.85, the mass of the coking coal is less than 10% of the mass of the coking coal mixture;

[0013] If the ratio Q satisfies: Q>0.85, the mass of the coking coal is less than 5% of the mass of the coking coal mixture.

[0014] Optionally, the coking coal mixture includes a fine-grained mixture, the mass of the fine-grained mixture is 66% to 75% of the mass of the coking coal mixture; and the particle size of the fine-grained mixture is ≤3 mm.

[0015] Optionally, the coking coal mixture further comprises volatile matter, and the mass of the volatile matter is less than 24% of the mass of the coking coal mixture.

[0016] Optionally, the coking coal mixture has a cohesiveness index greater than 76%.

[0017] Optionally, the coking coal mixture also includes water, ash and sulfur, the mass of the water is less than 13.5% of the mass of the coking coal mixture, the mass of the ash is less than 10.5% of the mass of the coking coal mixture, and the mass of the sulfur is less than 1.0% of the mass of the coking coal mixture.

[0018] Optionally, the method of screening multiple types of coking coal to obtain fine-grained coal samples comprises the following steps:

[0019] Performing a first screening on multiple types of coking coal to obtain a coarse-grained coal sample containing a fine-grained coal sample; wherein the particle size of the fine-grained coal sample is ≤3 mm;

[0020] Sampling and reducing the coarse-grained coal sample to obtain reduced-grained material;

[0021] Drying the shrunken material to obtain a dried coal sample;

[0022] The dried coal sample is subjected to a second screening to obtain a single fine-particle-size coal sample.

[0023] Optionally, the target particle size of the first screening is ≤10 mm, and the target particle size of the second screening is ≤3 mm.

[0024] Optionally, the statistical calculation of the ratio Q of the mass of the fine-grained coal sample to the mass of the coking coal comprises the steps of:

[0025] Calculating the ratio Q of the mass of the single fine-grained coal sample to the mass of the dried coal sample;

[0026] The ratio Q is taken as the ratio of the mass of the fine-particle coal sample to the mass of the coking coal.

[0027] Optionally, the drying temperature is 100°C to 110°C.

[0028] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0029] An embodiment of the present application provides a coking method for optimizing the ratio of coking coal. The coking method first screens different types of coking coal to obtain fine-grained coal samples with a particle size of ≤3 mm. The high cost defect of graded crushing can be avoided by screening. Then, the ratio of different types of coking coal is determined according to the ratio Q of the mass of these fine-grained coal samples to the mass of coking coal. The amount of fine-grained coal samples added to the coking coal mixture can be controlled to be at an appropriate level. The appropriate amount of fine-grained coal samples can effectively control the volume density of coking coal, so that there is enough coking coal mixture in the coking process, thereby increasing the yield of coke. Therefore, the coking method can increase the yield of coke at a low cost by screening and combining the coking coal ratio determined by the ratio Q of the mass of the fine-grained coal samples to the mass of coking coal. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0032] Figure 1 A schematic flow chart of a coking method for optimizing the coking coal ratio provided in an embodiment of the present application;

[0033] Figure 2 A detailed flow chart of a coking method for optimizing the coking coal ratio provided in an embodiment of the present application. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0035] Various embodiments of the present application may be presented in the form of a range; it should be understood that the description in the form of a range is only for convenience and brevity and should not be understood as a rigid limitation on the scope of the present application; therefore, it should be considered that the range description has specifically disclosed all possible sub-ranges and single numerical values ​​within the range; for example, it should be considered that the range description from 1 to 6 has specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as single numbers within the range, such as 1, 2, 3, 4, 5 and 6, which applies regardless of the range; in addition, whenever a numerical range is indicated in this document, it is meant to include any cited number (fractional or integer) within the indicated range.

[0036] In this document, the terms including "including" and "including" mean "including but not limited to". Relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone; where A and B can be singular or plural. "At least one" means one or more, and "plurality" means two or more; "at least one", "at least one of the following" or similar expressions, refers to any combination of these items, including any combination of single or plural items; for example, "at least one of a, b, or c", or "at least one of a, b, and c" can all mean: a, b, c, ab (i.e., a and b), ac, bc, or abc, where a, b, and c can be single or multiple. "Parts" such as parts by weight and parts by mass indicate the proportional relationship between the components. In the proportional relationship involved in this article, the parameters that need to be described by proportion should be understood as the first term of the proportional formula in the order of description, and the proportional numbers should be understood as the second term of the proportional formula. For example, if the mass ratio of substance A, substance B and substance C is 1:2:3, then substance A, substance B and substance C should correspond to the proportional numbers in the proportional formula in the order of description, that is, the mass of substance A: the mass of substance B: the mass of substance C = 1:2:3.

[0037] Unless otherwise specified, various raw materials, reagents, instruments and equipment used in this article can be purchased from the market or prepared by existing methods.

[0038] Figure 1 A schematic diagram of a coking method for optimizing the coking coal ratio provided in an embodiment of the present application is exemplarily shown;

[0039] like Figure 1 As shown, the embodiment of the present application provides a coking method for optimizing the coking coal ratio, and the coking method comprises:

[0040] S1. Screening multiple types of coking coal to obtain fine-grained coal samples; wherein the particle size of the fine-grained coal sample is ≤3 mm;

[0041] S2. Calculate the ratio Q of the mass of the fine-grained coal sample to the mass of the coking coal;

[0042] S3. Determine the ratio of different types of coking coal according to the size of the ratio Q;

[0043] S4. According to the ratio, the coking coal is mixed to obtain a coking coal mixture;

[0044] S5. Coking the coking coal mixture to obtain coke.

[0045] It should be noted that the coking coal can be 1 / 3 type coking coal, main coking coal, or fat coal.

[0046] It should be noted that in addition to the proportion of coking coal with fine particle size coal samples, some coking coal with larger coarse particle size coal samples also need to be added in the mixing stage.

[0047] It should be noted that the coking method for optimizing the coking coal ratio provided in the embodiment of the present application is not only scientific but also efficient, and can significantly increase the coke output under the premise of ensuring controllable costs. The core of the coking method is to maximize the utilization of coking coal resources through fine screening and precise ratio control. The specific process is:

[0048] (1) The coking method first strictly screens different types of coking coal to obtain fine-particle coal samples with a particle size of less than or equal to 3 mm. This step effectively avoids the high cost of graded crushing through physical screening, and also lays a solid foundation for the subsequent high-quality coking process.

[0049] (2) After obtaining the fine-grained coal samples, the ratio of different types of coking coal is further determined based on the ratio Q of the mass of these fine-grained coal samples to the overall mass of coking coal. The introduction of this ratio Q allows the amount of fine-grained coal samples added to the coking coal mixture to be strictly controlled at an appropriate level. An appropriate amount of fine-grained coal samples can fully play their role in the coking process, without too much resulting in excessive volume density and affecting coking efficiency, and too little resulting in insufficient coking coal mixing and affecting coke production.

[0050] (3) Through this refined proportion control, the coking method can achieve full utilization of the coking coal mixture while maintaining low cost. In addition, the refined proportion control can also ensure that the addition of fine-grained coal samples is in an appropriate state, which effectively controls the volume density of coking coal and ensures that there is enough coking coal mixture to participate in the reaction during the coking process, thereby significantly increasing the output of coke.

[0051] In summary, the embodiments of the present application provide a coking method for optimizing the coking coal ratio. The coking method achieves the goal of increasing coke production at low cost through screening processing and precise ratio control of the quality of fine-grained coal samples and the quality ratio Q of coking coal, thereby providing strong support for the sustainable development of the coking industry.

[0052] In some optional embodiments, determining the proportion of different types of coking coal according to the ratio Q comprises the following steps:

[0053] S301. If the ratio Q satisfies: 0.80<Q≤0.85, the mass of the coking coal is less than 10% of the mass of the coking coal mixture;

[0054] S302. If the ratio Q satisfies: Q>0.85, the mass of the coking coal is less than 5% of the mass of the coking coal mixture.

[0055] In these embodiments, the mass ratio of coking coal with fine-particle size coal samples and coking coal mixture can be clearly determined through the ratio Q and the sizes of 0.80 and 0.85, so as to control the amount of fine-particle coal samples added to the coking coal mixture to be at an appropriate level. The appropriate amount of fine-particle coal samples can effectively control the volume density of coking coal, so that there is enough coking coal mixture in the coking process, thereby increasing the output of coke.

[0056] It should be noted that if the ratio Q satisfies Q≤0.80, the quality of the coking coal can be controlled according to actual conditions to meet the requirements for adding coking coal to the blend.

[0057] In some optional embodiments, the coking coal mixture includes a fine-grained mixture, the mass of the fine-grained mixture is 66% to 75% of the mass of the coking coal mixture; and the particle size of the fine-grained mixture is ≤3 mm.

[0058] In these embodiments, the coking coal mixture may include a fine-grained mixture, and the mass of the fine-grained mixture may be 66% to 75% of the mass of the coking coal mixture, and the particle size of the fine-grained mixture may be ≤3 mm. The mass of the fine-grained mixture of the coking coal mixture may be controlled at a lower level to avoid excessive fine-grained mixture increasing the bulk density of the coking coal, so as to increase the amount of the coking coal mixture in the coking process, thereby increasing the yield of coke.

[0059] The mass of the fine fraction blend may be 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74% or 75% of the mass of the coking coal blend.

[0060] The particle size of the fine-size mixture may be 1 mm, 1.5 mm, 2.0 mm, 2.5 mm or 3.0 mm.

[0061] In some optional embodiments, the coking coal mixture further includes volatile matter, and the mass of the volatile matter is less than 24% of the mass of the coking coal mixture.

[0062] In these embodiments, the coking coal mixture may further include volatile matter, and the mass of the volatile matter may be less than 24% of the mass of the coking coal mixture, so that the volatile matter of the coking coal mixture is at a lower level. The coking coal mixture containing a lower level of volatile matter can optimize the quality of coke, improve the coking efficiency, and reduce the production cost. The specific explanation is as follows:

[0063] (1) Reasonable volatile matter weight content helps to improve the density and mechanical properties of coke. Based on the fact that volatile matter is the gaseous part released by coking coal during the coking process, its content directly affects the quality and yield of coke. When the quality of volatile matter is controlled below 24% of the total mass of the coking coal mixture, the degree of pyrolysis and polycondensation reaction in the coking process can be more effectively controlled, thereby obtaining coke with more stable quality and denser structure. Such coke has higher strength and wear resistance, which is more beneficial to the subsequent steelmaking process.

[0064] (2) Reasonable volatile matter weight content can also help improve coking efficiency. During the coking process, the release of volatile matter will take away some heat. If the volatile matter content is too high, the furnace temperature will drop, affecting the coking speed. Therefore, controlling the mass content of volatile matter below 24% can reduce the heat loss in the coking process and maintain the stability of the furnace temperature during the coking stage, thereby improving the coking efficiency and shortening the coking cycle;

[0065] (3) Reasonable volatile matter weight content can also help reduce coking costs. Coal with a higher volatile matter content usually requires a higher price, but through reasonable proportioning and control, the use of coal with a lower volatile matter content can also achieve the ideal coking effect and reduce raw material costs. At the same time, improving coking efficiency and coke quality can also reduce losses and scrap rates in the production process, further reducing production costs;

[0066] In summary, controlling the quality of volatile matter in coking coal blends to below 24% has positive significance for optimizing coke quality, improving coking efficiency and reducing production costs.

[0067] The mass of the volatile matter may be 2%, 4%, 6%, 8%, 10%, 12%, 14%, 16%, 18%, 20%, 22% or 24% of the mass of the coking coal blend.

[0068] In some optional embodiments, the coking coal blend has a cohesion index greater than 76%.

[0069] In these embodiments, the coking index of the coking coal mixture can be greater than 76%, which can improve the forming properties of various types of coking coal in the coking coal mixture. The coking coal mixture with high forming properties can form a dense and stable quality coke product in the coking stage.

[0070] The coking index of the coking coal blend may be 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84% or 85%.

[0071] In some optional embodiments, the coking coal mixture further includes water, ash and sulfur, the mass of the water being less than 13.5% of the mass of the coking coal mixture, the mass of the ash being less than 10.5% of the mass of the coking coal mixture, and the mass of the sulfur being less than 1.0% of the mass of the coking coal mixture.

[0072] In these embodiments, the coking coal mixture may also include water, ash and sulfur, and the mass of water may be less than 13.5% of the mass of the coking coal mixture, the mass of ash may be less than 10.5% of the mass of the coking coal mixture, and the mass of sulfur may be less than 1.0% of the mass of the coking coal mixture, so that the water, ash and sulfur contents of the coking coal mixture are at lower levels to improve the quality and performance of the coke.

[0073] The mass of water may be 13.5%, 13.0%, 12.5%, 12.0%, 11.5% or 11.0% of the mass of the coking coal blend.

[0074] The mass of the ash may be 10.5%, 10.0%, 9.5%, 9.0%, 8.5%, 8.0% or 7.5% of the mass of the coking coal blend.

[0075] The mass of the sulfur content can be 1.0%, 0.9%, 0.8%, 0.7%, 0.6% or 0.5% of the mass of the coking coal blend.

[0076] Figure 2 A detailed schematic diagram of a coking method for optimizing the coking coal ratio provided in an embodiment of the present application is exemplarily shown;

[0077] In some optional embodiments, the screening of multiple types of coking coal to obtain fine-grained coal samples comprises the steps of:

[0078] S101. Performing a first screening of multiple types of coking coal to obtain a coarse-grained coal sample containing a fine-grained coal sample; wherein the particle size of the fine-grained coal sample is ≤3 mm;

[0079] S102. Sampling and reducing the coarse-grained coal sample to obtain a reduced material;

[0080] S103. Drying the shrunken material to obtain a dried coal sample;

[0081] S104. Perform a second screening on the dried coal sample to obtain a single fine-particle coal sample.

[0082] In these embodiments, the coking coal is first subjected to a first screening and sampling reduction, so as to accurately extract representative reduced materials, and then the influence of moisture on the particle size distribution detection of the reduced materials is avoided by drying. Then, the dried coal sample is subjected to a second screening, so as to accurately screen out a single fine-particle coal sample with a particle size of less than 3 mm, so as to facilitate the subsequent deduction of the proportion of fine-particle coal samples in the coking coal according to the mass ratio of the single fine-particle coal sample and the dried coal sample.

[0083] In some optional embodiments, the target particle size of the first screening is ≤10 mm, and the target particle size of the second screening is ≤3 mm.

[0084] In these embodiments, the target particle size of the first screening can be ≤10mm, and the target particle size of the second screening can be ≤3mm. The coarse-particle coal sample containing fine-particle coal sample can be accurately screened out by the first screening method, and a single fine-particle coal sample can be accurately screened out by the second screening method. Therefore, the relationship between a single fine-particle coal sample and the dried coal sample can intuitively reflect the relationship between the fine-particle coal sample and the coking coal.

[0085] In some optional embodiments, the statistical calculation of the ratio Q of the mass of the fine-grained coal sample to the mass of the coking coal comprises the steps of:

[0086] S201. Calculate the ratio Q of the mass of the single fine-grained coal sample to the mass of the dried coal sample;

[0087] S202. The ratio Q is used as the ratio of the mass of the fine-grained coal sample to the mass of the coking coal;

[0088] In these embodiments, the ratio Q of the mass of a single fine-particle coal sample and the mass of a dried coal sample is used as the ratio of the fine-particle coal sample to the coking coal. The ratio Q can be used to accurately control the different proportions of the coking coal, and the amount of fine-particle coal sample added to the coking coal mixture can be controlled to increase the amount of the coking coal mixture in the coking process, thereby increasing the yield of coke.

[0089] In some optional embodiments, the drying temperature is 100°C to 110°C.

[0090] In these embodiments, the drying temperature can be 100°C to 110°C, so that the moisture of the shrunken material can be fully dried out, avoiding the moisture affecting the quality of a single fine-particle coal sample, and improving the accuracy of the ratio Q of the mass of a single fine-particle coal sample to the mass of the dried coal sample, so as to accurately control the weight content of the fine-particle coal sample in the coking coal mixture, so as to effectively control the volume density of the coking coal, so that there is enough coking coal mixture in the coking process, thereby increasing the output of coke.

[0091] The drying temperature can be 100°C, 101°C, 102°C, 103°C, 104°C, 105°C, 106°C, 107°C, 108°C, 109°C or 110°C.

[0092] The present application is further described below in conjunction with specific examples. The experimental methods in the following examples where specific conditions are not specified are usually measured in accordance with national standards / industry standards; if there are no corresponding national standards / industry standards, they are measured in accordance with common international standards, conventional conditions or conditions recommended by the manufacturer.

[0093] Example 1

[0094] 17 types of commonly used coking coals were screened according to the following method.

[0095] like Figure 2 As shown, a coking method for optimizing the proportion of coking coal comprises:

[0096] S101. Performing a first screening of multiple types of coking coal with a 10 mm sieve to obtain a coarse-grained coal sample containing a fine-grained coal sample; wherein the particle size of the fine-grained coal sample is ≤3 mm;

[0097] S102. The coarse-grained coal sample is sampled and divided to obtain 2 kg of divided material;

[0098] S103. Drying the reduced material to obtain a dried coal sample;

[0099] S104. 500 g of the dried coal sample is subjected to a second sieving with a 3 mm round hole sieve to obtain a single fine particle size coal sample; wherein the particle size of the fine particle size coal sample is ≤3 mm;

[0100] S2. The ratio Q of the mass of the fine-particle coal sample to the mass of the coking coal is calculated; wherein the ratio Q of the mass of the fine-particle coal sample to the mass of the coking coal is shown in Table 1;

[0101] Table 1 Data of the ratio Q of different types of coking coal

[0102]

[0103]

[0104] S301. If the ratio Q satisfies: 0.80<Q≤0.85, the mass of the coking coal is less than 10% of the mass of the coking coal mixture;

[0105] S302. If the ratio Q satisfies: Q>0.85, the mass of the coking coal is less than 5% of the mass of the coking coal mixture;

[0106] S4. According to the ratio, the coking coal is mixed to obtain a coking coal mixture;

[0107] S5. Coking the coking coal mixture to obtain coke.

[0108] The coking coal mixture includes a fine-grained mixture, the mass of which accounts for 69.28% of the mass of the coking coal mixture; and the particle size of the fine-grained mixture is ≤3 mm.

[0109] The coking coal blend also includes volatile matter, the mass of the volatile matter being less than 24% of the mass of the coking coal blend.

[0110] The coking index of the coking coal blend is greater than 76%.

[0111] The coking coal mixture also includes water, ash and sulfur, the mass of water is less than 13.5% of the mass of the coking coal mixture, the mass of ash is less than 10.5% of the mass of the coking coal mixture, and the mass of sulfur is less than 1.0% of the mass of the coking coal mixture.

[0112] The target particle size of the first screening is ≤10mm, and the target particle size of the second screening is ≤3mm.

[0113] The drying temperature is 105°C.

[0114] Example 2

[0115] Based on the contents disclosed in Example 1, the following modifications are further made:

[0116] The mass of the fine-grained mixture was adjusted to 74.50% of the mass of the coking coal mixture. The proportions of the 17 types of coking coal are shown in Table 2.

[0117] Example 3

[0118] Based on the contents disclosed in Example 1, the following modifications are further made:

[0119] The mass of the fine-grained mixture was adjusted to 65.80% of the mass of the coking coal mixture. The proportions of the 17 types of coking coal are shown in Table 2.

[0120] Comparative Example 1

[0121] Based on the contents disclosed in Example 1, the following modifications are further made:

[0122] 17 types of coking coal were blended according to conventional proportions, and the specific proportions are shown in Table 2.

[0123] Table 2 The proportion relationship of coking coal in each embodiment and comparative example

[0124]

[0125]

[0126] Related experiments and effect data:

[0127] The coking coal mixtures obtained in each embodiment and comparative example were collected respectively, and a subsequent coking process was carried out. Various parameters of the coking process were statistically analyzed, and the results are shown in Table 3.

[0128] Table 3 Coking process parameters of various embodiments and comparative examples

[0129]

[0130] As can be seen from Table 1, the embodiment of the present application provides a coking method for optimizing the coking coal ratio. The coking method can increase the single-hole coal loading amount of coking coal by 0.76% through screening treatment and precise ratio control of the quality of fine-grained coal samples and the quality ratio Q of coking coal, and the quality of coke remains basically stable.

[0131] In addition, an embodiment of the present application provides a coking method for optimizing the coking coal ratio. The coking method uses the quality of fine-grained coal samples and the coking coal quality ratio Q as a coal blending adjustment index, and comprehensively considers the quality and fineness of the coal blending. It can not only ensure that the coking production meets the quality requirements of coke, but also can specifically adjust the coal blending parameters according to the actual demand for coke production, thereby realizing the smooth and stable coking process and blast furnace production.

[0132] In addition, an embodiment of the present application provides a coking method for optimizing the coking coal ratio. The coking method achieves the goal of increasing coke production at low cost through screening processing and precise ratio control of the quality of fine-grained coal samples and the quality ratio Q of coking coal, providing strong support for the sustainable development of the coking industry.

[0133] The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. It will be apparent to those skilled in the art that various modifications to these embodiments are possible, and the general principles defined in the present application can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown in the present application, but will conform to the widest range consistent with the principles and novel features applied for by the present application.

Claims

1. A coking method for optimizing the proportion of coking coal, the coking method comprising: Screening multiple types of coking coal to obtain fine-grained coal samples; wherein the particle size of the fine-grained coal samples is ≤3 mm; Calculating a ratio Q of the mass of the fine-grained coal sample to the mass of the coking coal; Determining the proportion of different types of coking coal according to the ratio Q; According to the ratio, the coking coal is mixed to obtain a coking coal mixture; The coking coal mixture is coked to obtain coke.

2. The coking method according to claim 1, wherein the ratio of different types of coking coal is determined according to the ratio Q, comprising the steps of: If the ratio Q satisfies: 0.80<Q≤0.85, the mass of the coking coal is less than 10% of the mass of the coking coal mixture; If the ratio Q satisfies: Q>0.85, the mass of the coking coal is less than 5% of the mass of the coking coal mixture.

3. The coking method according to claim 1, wherein the coking coal mixture comprises a fine-grained mixture, the mass of the fine-grained mixture is 66% to 75% of the mass of the coking coal mixture; and the particle size of the fine-grained mixture is ≤3 mm. 4 . The coking method according to claim 1 , wherein the coking coal mixture further comprises volatile matter, and the mass of the volatile matter is less than 24% of the mass of the coking coal mixture.

5. The coking method according to claim 1, wherein the coking coal mixture has a cohesive index greater than 76%.

6. The coking method according to claim 1, wherein the coking coal mixture further comprises water, ash and sulfur, the mass of the water being less than 13.5% of the mass of the coking coal mixture, the mass of the ash being less than 10.5% of the mass of the coking coal mixture, and the mass of the sulfur being less than 1.0% of the mass of the coking coal mixture.

7. The coking method according to claim 1, wherein the plurality of types of coking coal are screened to obtain fine-grained coal samples, comprising the steps of: The plurality of types of coking coal are first screened to obtain a coarse-grained coal sample containing a fine-grained coal sample; wherein, The particle size of the fine-grained coal sample is ≤3 mm; Sampling and reducing the coarse-grained coal sample to obtain reduced-grained material; Drying the shrunken material to obtain a dried coal sample; The dried coal sample is subjected to a second screening to obtain a single fine-particle-size coal sample.

8. The coking method according to claim 7, wherein the target particle size of the first screening is ≤10 mm, and the target particle size of the second screening is ≤3 mm.

9. The coking method according to claim 7, wherein the calculating the ratio Q of the mass of the fine-grained coal sample to the mass of the coking coal comprises the following steps: Calculating the ratio Q of the mass of the single fine-grained coal sample to the mass of the dried coal sample; The ratio Q is taken as the ratio of the mass of the fine-particle coal sample to the mass of the coking coal.

10. The coking method according to claim 7, wherein the drying temperature is 100°C to 110°C.

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