Coke for use with russian coal and method for its production

Abstract

The present application provides a kind of coke for matching Russian coal and its production method, it is related to coking coal blending technical field, Russian coal is matched with other coking coal according to the following weight percentage: Russian coal 15%~20%, lean coal 20%~35%, lean coal 0~15%, 1 / 3 coking coal 15%~25%, gas coal 0~18%, fat coal 5~25%, coking coal 0~15%; the quality index of matched coal meets the following requirements: active inert ratio 1.0~1.4, MCI value≤4, G value≥60.The present application realizes the large proportion application of Russian coal, produces coke CRI≤28%, CSR≥64%, other indexes meet the requirements of national standard first-grade coke; the proportion of lean coal and other low-caking low-quality coal is expanded, and the coal blending cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of coking coal blending technology, and in particular to a coke blended with Russian coal and its production method. Background Technology

[0002] In recent years, with increasing emphasis on coal mine safety in China, the effective supply of existing coal mines may gradually shrink. Furthermore, my country's total coking coal resources are limited, with coking coal, fat coal, and lean coal being scarce. Moreover, of the existing resources, most coking coal, lean coal, and about one-third of coking coal are high-sulfur coal, while low-sulfur coking coal, fat coal, and lean coal are even scarcer. my country's coking coal resources and production capacity cannot stably, sustainably, and at low prices meet domestic demand, especially given the persistently tight supply and demand for high-quality, low-sulfur coking coal. Therefore, a rigid supplement of high-quality, inexpensive coking coal resources from abroad is necessary.

[0003] Russia offers a complete range of coking coal varieties, which are generally low in sulfur, helping to alleviate the supply and demand tension of high-quality coking coal in China and stabilize domestic coking coal market price fluctuations. However, due to the unique coal-forming materials and aging periods, most Russian coals have very poor thermal strength, with some varieties having a CSR of only around 20% when used alone for coking, which is far inferior to the strength of domestic fat coal and coking coal. When blended, this significantly affects the thermal strength of coke.

[0004] The large-scale application of Russian coal has been a key focus in the industry. Domestically, the proportion of Russian coal used in coking blends generally does not exceed 15%, and in top-loading coking blends, it does not exceed 10%. Patent CN102533299 A discloses a method for incorporating Russian coking coal into coking blends. This method allows for the rational and effective utilization of Russian coking coal without graded crushing, briquetting, or rammed coking processes, without deteriorating coke quality and reducing blending costs. The usage proportion of Russian coking coal is 8%–12%. However, this method has not achieved large-scale application of Russian coal, and the coke performance remains unsatisfactory.

[0005] In view of this, the present invention is hereby proposed. Summary of the Invention

[0006] One of the objectives of this invention is to provide a coke production method using Russian coal, thereby enabling the large-scale application of Russian coal to produce qualified coke, thus reducing coal blending costs and expanding coking coal resources.

[0007] The second objective of this invention is to provide a coke formulated with Russian coal.

[0008] The third objective of this invention is to provide a blended coal for coke production.

[0009] In order to achieve the above-mentioned objectives of the present invention, the following technical solution is adopted:

[0010] This invention provides a method for producing coke using Russian coal, comprising the following steps:

[0011] (1) Blend Russian coal with other coking coal in the following weight percentages:

[0012] Russian coal 15%–20% (e.g., 15%, 16%, 17%, 18%, 19%, 20%), lean coal 20%–35% (e.g., 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, 32%, 34%, 35%), semi-lean coal 0–15% (e.g., 0%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%), 1 / 3 coking coal 15%–25% (e.g., 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%), gas Coal 0–18% (e.g., 0, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%), bituminous coal 5–25% (e.g., 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%), coking coal 0–15% (e.g., 0, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%), to obtain blended coal;

[0013] (2) Coal preparation and coking production: The blended coal is crushed and then compacted, and coking is carried out in a compacted coke oven to obtain coke.

[0014] Step (1)

[0015] There are no specific restrictions on the type of Russian coal, as long as the following criteria are met.

[0016] Russian coal meets the following specifications: volatile matter 28%–40%, G value ≥90, CSR of 40kg coke produced by small coke oven of single type of coal ≥20%, active-inert ratio ≥5, MCI value ≥6;

[0017] In some implementations, Russian coal meets the following specifications: ash content 9%–11%, volatile matter 33%–38%, sulfur content 0.2%–0.6%, G value ≥90, Y value ≥14, CSR of 40kg coke produced by small coke oven of single type of coal 20%–35%, active-inert ratio 5–15, and MCI value ≥6.

[0018] There are no special restrictions on the source of Russian coal. It can be used from the same source (e.g., the manufacturer) or from different sources mixed together, as long as each source of Russian coal meets the above requirements.

[0019] There are no special restrictions on the source of gas coal, fat coal, coking coal, 1 / 3 coking coal, lean coal, and semi-lean coal, as long as they meet the requirements of the national standard GBT 5751-2009 "Classification of Chinese Coal".

[0020] In some implementations, other coking coals meet the following criteria:

[0021] Gas coal must meet the following specifications: volatile matter 28%–40%, G value ≥40, CSR of 40kg coke produced by small coke oven of single type of coal ≥35%, live-in-inert ratio <5, MCI value <6.

[0022] The following indicators must be met for coking coal: volatile matter 10% to 37%, G value ≥ 85, CSR of 40kg coke produced by small coke oven of single type of coal ≥ 55%, live-in-inert ratio < 5, MCI value < 6.

[0023] Coking coal must meet the following specifications: volatile matter 10%–28%, G value ≥80, CSR ≥50% for 40kg coke produced in a small coke oven, live-in-inert ratio <5, MCI value <6.

[0024] 1 / 3 coking coal meets the following indicators: volatile matter 28%~37%, G value ≥65, CSR of coke produced by small coke oven of 40kg single type of coal ≥45%, live-in-inert ratio <5, MCI value ≤4;

[0025] Lean coal meets the following criteria: volatile matter 10%–20%, G value ≤20, active-inert ratio <5, MCI value <6;

[0026] Lean coal must meet the following criteria: volatile matter 10%–20%, G value ≥ 40, CSR of 40kg coke produced by small coke oven of a single type of coal ≥ 20%, live-in-inert ratio < 5, MCI value < 6.

[0027] In some implementations, other coking coals meet the following criteria:

[0028] The gas coal meets the following specifications: ash content 6.5%–9%, ​​volatile matter 35%–40%, sulfur content 0.45%–0.55%, G value ≥65, Y value ≥11, CSR of 40kg coke for small coke ovens of single type of coal is 35%–40%, active-inert ratio is 0.95–1.1, and MCI value is 3–6.

[0029] The coking coal meets the following specifications: ash content 5%–12%, volatile matter 27%–37%, sulfur content 0.4%–4.0%, G value ≥90, Y value ≥24, CSR of 40kg coke produced by small coke ovens of a single type of coal is 55%–70%, active-inert ratio is 1–4, and MCI value is 2.5–5.5.

[0030] Coking coal must meet the following specifications: ash content 10%–10.5%, volatile matter 20%–28%, sulfur content 0.6%–0.8%, G value ≥80, Y value ≥19, CSR of 40kg coke produced by small coke ovens of a single type of coal 50%–70%, active-inert ratio 3–4, and MCI value 2.5–3.5.

[0031] 1 / 3 coking coal meets the following specifications: ash content 8%–9%, ​​volatile matter 30%–37%, sulfur content 0.3%–0.5%, G value ≥80, Y value ≥18, CSR of 40kg coke produced by small coke ovens of single type of coal is 45%–55%, active-inert ratio is 1–1.5, and MCI value is 2.8–3.2;

[0032] The lean coal meets the following specifications: ash content 9.5%–11%, volatile matter 13%–15%, sulfur content 0.4%–0.7%, G value <15, Y value ≥4, active-inert ratio 0.4–0.6, MCI value 1–3;

[0033] The lean coal meets the following specifications: ash content 10%–11%, volatile matter 16%–18%, sulfur content 0.6%–0.8%, G value ≥65, Y value ≥8, CSR of 40kg coke produced by small coke ovens of a single type of coal is 40%–50%, active-inert ratio is 0.8–1.0, and MCI value is 3–3.5.

[0034] There are no special restrictions on the source of gas coal, fat coal, coking coal, 1 / 3 coking coal, lean coal, and semi-lean coal. They can be from the same source (e.g., the manufacturer) or mixed from different sources, as long as each source of coal meets the above requirements.

[0035] For indicators not covered in this invention, the coal types involved are defined according to the national standard GB / T 5751-2009.

[0036] The methods for measuring each indicator are as follows:

[0037] Ash and volatile matter: determined according to the rapid ashing method A and volatile matter determination method in GB / T 212-2008 "Industrial Analysis Methods for Coal".

[0038] Coal sulfur content: determined by coulometric method according to GB / T214-2007 "Determination of total sulfur in coal".

[0039] The caking index (G value) was determined in accordance with GB / T 50047-2014 "Method for Determination of Caking Index of Bituminous Coal".

[0040] Y value: determined according to GB / T 479-2016 "Method for Determination of Coal ...

[0041] Hot strength includes coke reactivity (CRI) and post-reaction strength (CSR): determined according to GB / T 4000-2017 "Test Methods for Coke Reactivity and Post-reaction Strength".

[0042] The coking test of the 40kg small coke oven was conducted according to YB / T 4526-2016 "Technical Specification for Small Coke Ovens for Coking Tests".

[0043] The active-inert ratio is calculated according to Formula 1:

[0044]

[0045] The active / inert ratio (A / I) represents the ratio of active components to inert components in a single type of coal or blended coal, with vitrinite (V), %, cinnamic acid (E), %, inert acid (I), %, and minerals, %.

[0046] First, prepare pulverized coal slides according to GB / T 16773-2008 "Methods for Preparing Samples for Coal Petrological Analysis", and then determine each active and inert micro-component according to GB / T8899-2013 "Methods for Microscopic Grouping and Mineral Determination of Coal".

[0047] The alkali metal catalytic index (MCI) value is calculated according to Equation 2:

[0048]

[0049] Wherein, MCI is the mineral catalytic index, and Fe2O3, Na2O, K2O, CaO, MgO, SiO2, Al2O3, and TiO2 are the mass fractions (%) of each metal element in the ash composition; A d V d , which are the mass fractions of dry basis ash and volatile matter in the coal, respectively, %.

[0050] The content of each metal element in the ash was determined according to GB / T 37673-2019 "Determination of silicon, aluminum, iron, calcium, magnesium, potassium, phosphorus, titanium, manganese, barium and strontium in coal ash by X-ray fluorescence spectrometry".

[0051] In some embodiments, Russian coal is blended with other coking coals in the following weight percentages: 15-16% Russian coal, 13-15% gas coal, 13-15% fat coal, 10-12% coking coal, 15-16% 1 / 3 coking coal, and 30-32% lean coal. In one embodiment, the blend consists of 15% Russian coal, 14% gas coal, 14% fat coal, 11% coking coal, 15% 1 / 3 coking coal, and 31% lean coal.

[0052] In some embodiments, Russian coal is blended with other coking coals in the following weight percentages: 18-19% Russian coal, 10-12% gas coal, 20-22% fat coal, 20-22% 1 / 3 coking coal, and 30-32% lean coal. In one embodiment, the proportions are 18% Russian coal, 10% gas coal, 20% fat coal, 20% 1 / 3 coking coal, and 32% lean coal.

[0053] In some embodiments, Russian coal is blended with other coking coals in the following weight percentages: 19-20% Russian coal, 24-25% 1 / 3 coking coal, 12-14% fat coal, 10-12% coking coal, 20-22% lean coal, and 10-12% semi-lean coal. In one embodiment, the proportions are: 20% Russian coal, 25% 1 / 3 coking coal, 13% fat coal, 10% coking coal, 21% lean coal, and 11% semi-lean coal.

[0054] The quality indicators of the blended coal obtained in step (1) are: active-inert ratio 1.0-1.4, MCI value ≤4, and G value ≥60.

[0055] Step (2)

[0056] This step involves coal preparation and coking production, including: crushing the blended coal; then compacting it; and producing coke in a compacted coke oven using dry quenching technology to obtain coke.

[0057] In some embodiments, the proportion of particles smaller than 3 mm after crushing is 88% to 91%.

[0058] In some implementations, the tamping density is controlled at 1.03–1.05 t / m³. 3 .

[0059] The coke obtained in step (2) meets the following quality indicators: ash content ≤12%, sulfur content ≤0.70%, M 40 ≥82%, M 25 ≥92%, M 10 ≤6.5%, CRI≤28%, CSR≥64%, meeting the national standard requirements for Grade I coke.

[0060] The methods for measuring each indicator are as follows:

[0061] Coke sample collection and preparation: Samples were prepared in accordance with GB / T 1997-2008 "Collection Sample Collection and Preparation".

[0062] Coke ash content: determined according to Arbitration Method A in GB / T 2001-2013 "Analysis and Determination Methods for Coke Industry".

[0063] Coke sulfur content: determined by coulometric method according to GB / T 2286-2017 "Determination of total sulfur content in coke".

[0064] Coke mechanical strength M 40 M 25 M 10 The determination method is in accordance with GB / T 2006-2008 "Determination of Mechanical Strength of Coke".

[0065] Coke reactivity and post-reaction strength: determined according to GB / T 4000-2017 "Test Method for Coke Reactivity and Post-reaction Strength".

[0066] This invention utilizes Russian coal in large proportions, taking advantage of its high vitrinite content. Therefore, it incorporates coal types with more inert substances to balance the active-inert ratio in the blended coal. Furthermore, it uses the alkali metal catalytic index (MCI) to balance the high positive catalytic content of alkali metals in Russian coal, thereby achieving the goal of producing qualified coke.

[0067] In another aspect, the present invention provides coke produced using the coke production method with Russian coal.

[0068] The coke is the coke obtained in step (2) and has the properties described above.

[0069] In another aspect, the present invention provides a blended coal for coke production, wherein the weight percentages of various coking coals in the blended coal are as follows: Russian coal 15%–20%, lean coal 20%–35%, semi-lean coal 0–15%, 1 / 3 coking coal 15%–25%, gas coal 0–18%, fat coal 5–25%, and coking coal 0–15%.

[0070] Among them, Russian coal meets the following criteria: volatile matter 28% to 40%, G value ≥ 90, CSR of 40kg coke produced by small coke oven of single type of coal ≥ 20%, live-in-inert ratio ≥ 5, MCI value ≥ 6;

[0071] The quality indicators of the obtained blended coal meet the following requirements: active-inert ratio 1.0-1.4, MCI value ≤4, and G value ≥60.

[0072] There are no special restrictions on the source of gas coal, fat coal, coking coal, 1 / 3 coking coal, lean coal, and semi-lean coal, as long as they meet the requirements of the national standard GBT 5751-2009 "Classification of Chinese Coal".

[0073] In some implementations, the gas coal meets the following criteria: volatile matter 28%–40%, G value ≥40, CSR of 40kg coke produced by small coke oven of single type of coal ≥35%, active-inert ratio <5, MCI value <6.

[0074] The following indicators must be met for coking coal: volatile matter 10% to 37%, G value ≥ 85, CSR of 40kg coke produced by small coke oven of single type of coal ≥ 55%, live-in-inert ratio < 5, MCI value < 6.

[0075] Coking coal must meet the following specifications: volatile matter 10%–28%, G value ≥80, CSR ≥50% for 40kg coke produced in a small coke oven, live-in-inert ratio <5, MCI value <6.

[0076] 1 / 3 coking coal meets the following indicators: volatile matter 28%~37%, G value ≥65, CSR of coke produced by small coke oven of 40kg single type of coal ≥45%, live-in-inert ratio <5, MCI value ≤4;

[0077] Lean coal meets the following criteria: volatile matter 10%–20%, G value ≤20, active-inert ratio <5, MCI value <6;

[0078] Lean coal must meet the following criteria: volatile matter 10%–20%, G value ≥ 40, CSR of 40kg coke produced by small coke ovens of a single type of coal ≥ 20%, live-in-inert ratio < 5, MCI value < 6.

[0079] In some implementations, Russian coal meets the following specifications: ash content 9%–11%, volatile matter 33%–38%, sulfur content 0.2%–0.6%, G value ≥90, Y value ≥14, CSR of 40kg coke produced by small coke oven of single type of coal 20%–35%, active-inert ratio 5–15, and MCI value ≥6.

[0080] The gas coal meets the following specifications: ash content 6.5%–9%, ​​volatile matter 35%–40%, sulfur content 0.45%–0.55%, G value ≥65, Y value ≥11, CSR of 40kg coke for small coke ovens of single type of coal is 35%–40%, active-inert ratio is 0.95–1.1, and MCI value is 3–6.

[0081] The coking coal meets the following specifications: ash content 5%–12%, volatile matter 27%–37%, sulfur content 0.4%–4.0%, G value ≥90, Y value ≥24, CSR of 40kg coke produced by small coke ovens of a single type of coal is 55%–70%, active-inert ratio is 1–4, and MCI value is 2.5–5.5.

[0082] Coking coal must meet the following specifications: ash content 10%–10.5%, volatile matter 20%–28%, sulfur content 0.6%–0.8%, G value ≥80, Y value ≥19, CSR of 40kg coke produced by small coke ovens of a single type of coal 50%–70%, active-inert ratio 3–4, and MCI value 2.5–3.5.

[0083] 1 / 3 coking coal meets the following specifications: ash content 8%–9%, ​​volatile matter 30%–37%, sulfur content 0.3%–0.5%, G value ≥80, Y value ≥18, CSR of 40kg coke produced by small coke ovens of single type of coal is 45%–55%, active-inert ratio is 1–1.5, and MCI value is 2.8–3.2;

[0084] The lean coal meets the following specifications: ash content 9.5%–11%, volatile matter 13%–15%, sulfur content 0.4%–0.7%, G value <15, Y value ≥4, active-inert ratio 0.4–0.6, MCI value 1–3;

[0085] The lean coal meets the following specifications: ash content 10%–11%, volatile matter 16%–18%, sulfur content 0.6%–0.8%, G value ≥65, Y value ≥8, CSR of 40kg coke produced by small coke ovens of a single type of coal is 40%–50%, active-inert ratio is 0.8–1.0, and MCI value is 3–3.5.

[0086] In some embodiments, the weight percentages of various coking coals in the blended coal are as follows: Russian coal 15-16%, gas coal 13-15%, fat coal 13-15%, coking coal 10-12%, 1 / 3 coking coal 15-16%, and lean coal 30-32%. In one embodiment, Russian coal 15%, gas coal 14%, fat coal 14%, coking coal 11%, 1 / 3 coking coal 15%, and lean coal 31%.

[0087] In some embodiments, the weight percentages of various coking coals in the blended coal are as follows: Russian coal 18-19%, gas coal 10-12%, fat coal 20-22%, 1 / 3 coking coal 20-22%, and lean coal 30-32%. In one embodiment, Russian coal 18%, gas coal 10%, fat coal 20%, 1 / 3 coking coal 20%, and lean coal 32%.

[0088] In some embodiments, the weight percentages of various coking coals in the blended coal are as follows: Russian coal 19-20%, 1 / 3 coking coal 24-25%, fat coal 12-14%, coking coal 10-12%, lean coal 20-22%, and semi-lean coal 10-12%. In one embodiment, Russian coal 20%, 1 / 3 coking coal 25%, fat coal 13%, coking coal 10%, lean coal 21%, and semi-lean coal 11%.

[0089] The technical solution of the present invention has the following beneficial effects:

[0090] 1. Achieved large-scale application of Russian coal, producing coke with a CRI ≤ 28%, CSR ≥ 64%, and low ash, sulfur, and M content. 40 M 25 M 10 The indicators meet the national standard requirements for Grade I coke.

[0091] 2. It increased the proportion of low-caking, low-quality coals such as lean coal, thus reducing coal blending costs.

[0092] 3. It has expanded coking coal resources and reduced dependence on domestic low-sulfur coal.

[0093] The present invention has been described in detail above; however, the above embodiments are merely illustrative in nature and are not intended to limit the invention. Furthermore, this document is not limited to the foregoing prior art or the invention itself, or to any theory described in the following embodiments.

[0094] Unless otherwise expressly stated, numerical ranges throughout the application include any subranges therein and any numerical values ​​incremented by the smallest subunit of a given value. Unless otherwise expressly stated, numerical values ​​throughout the application represent approximate measures or limitations on the range of embodiments including minor deviations from a given value and having approximately the mentioned value as well as having the mentioned precise value. Except in the detailed description of the working embodiments provided at the end, all numerical values ​​of parameters (e.g., quantities or conditions) in this application (including the appended claims) should in all cases be understood to be modified by the term “approximately,” regardless of whether “approximately” actually precedes the numerical value. “Approximately” indicates that the stated numerical value allows for slight inaccuracies (some close to precision at that value; approximately or reasonably close to the value; approximate). If the inaccuracy provided by “approximately” is not understood in this common sense in the art, then “approximately” as used herein at least indicates a variation that can be produced by common methods of measuring and using these parameters. For example, “approximately” can include variations less than or equal to 10%, less than or equal to 5%, less than or equal to 4%, less than or equal to 3%, less than or equal to 2%, less than or equal to 1%, or less than or equal to 0.5%. Attached Figure Description

[0095] Figure 1 A graph showing the relationship between the active-inert ratio, MCI value, and CSR of blended coal with a large proportion of Russian coal. Detailed Implementation

[0096] The present invention will be further described below with reference to the embodiments. It should be noted that the following embodiments are provided for illustrative purposes only and do not constitute a limitation on the scope of protection of the present invention.

[0097] Unless otherwise specified, the raw materials, reagents, and methods used in the embodiments are all conventional raw materials, reagents, and methods in the art.

[0098] The quality parameters of various coking coals used in the examples are shown in Table 1.

[0099] Table 1

[0100] Russian A Coal 10.68 35.28 0.21 95.83 24.29 29.58 7.12 6.24 Russian B Coal 10.33 33.36 0.41 98.2 14.51 31.06 14.33 6.08 Russian C Coal 9.21 36.55 0.56 90 38.71 20.32 5.87 6.24 Gas A 8.80 37.39 0.54 65.00 11.60 35.00 0.96 3.04 Gas B 6.72 37.69 0.48 70.00 11.00 35.00 1.07 5.81 Coal Fertilizer A 9.30 36.80 3.60 95.00 31.00 55.00 1.91 3.13 Coal B 11.83 27.14 0.74 91.60 26.00 65.00 1.14 2.60 Coal Fen C 5.00 28.00 0.48 90.00 25.00 55.00 23.4 5.22 Coking Coal A 10.11 27.39 0.70 83.14 19.21 63.00 3.60 3.04 Coking Coal B 10.26 24.54 0.67 76.54 21.29 57.00 3.595 2.41 1 / 3 Coking Coal A 8.86 37.00 0.34 83.81 18.30 49.00 1.30 2.99 1 / 3 coking coal B 9.00 36.28 0.43 84.00 18.50 50.00 1.03 4.17 Lean coal A 9.92 14.58 0.69 11.00 7.00 - 0.43 1.20 Lean coal B 10.60 13.30 0.40 6.00 4.00 - 0.515 2.53 lean coal 10.61 17.79 0.67 68.00 8.00 45.00 0.89 3.23

[0101] - indicates that the item does not exist.

[0102] Example 1: 15% Russian A coal was added, as shown in Table 2:

[0103] Table 2. Russian A coal blending at 15%

[0104] Proportion 15％ 8％ 6％ 10％ 4％ 11％ 15％ 31％

[0105] The Russian A coal was blended with other coking coals in a certain proportion, and the weight percentages of each coal were as follows: Russian A coal 15%, gas coal 14%, coking coal 25%, 1 / 3 coking coal A 15%, and lean coal 31%.

[0106] The quality indicators of the blended coal were determined as follows: ash content 9.52%, volatile matter 28.34%, sulfur content 0.78%, caking index G 62, active-inert ratio 1.07, and MCI 3.10, meeting production requirements. The blended coal was then pulverized, with 88.9% of the particles smaller than 3mm remaining. It was then compacted, with a compacted bulk density of 1.03 t / m³. 3 Production experiments were conducted on a 5.5m tamping coke oven with a coking time of 26 hours and dry quenching. The resulting coke quality is as follows: reactivity CRI of 23.98%, post-reaction strength CSR of 65.8%, and the ash content, sulfur content, and M of the coke are also satisfactory. 40 M 25 M 10 All requirements are met.

[0107] Example 2: 15% Russian B coal was added, as shown in Table 3:

[0108] Table 3. Russian B coal blending at 15%

[0109] Proportion 15％ 8％ 6％ 10％ 4％ 11％ 15％ 31％

[0110] The Russian B coal was blended with other coking coals in a certain proportion, and the weight percentages of each coal were as follows: Russian B coal 15%, gas coal 14%, coking coal 25%, 1 / 3 coking coal A 15%, and lean coal 31%.

[0111] The quality indicators of the blended coal were determined as follows: ash content 9.52%, volatile matter 27.25%, sulfur content 0.81%, caking index G 63, active-inert ratio 1.37, and MCI 3.02, meeting production requirements. The blended coal was then pulverized, with 88.9% of the particles smaller than 3mm remaining. It was then compacted, with a compacted bulk density of 1.03 t / m³. 3 Production experiments were conducted on a 5.5m tamping coke oven with a coking time of 26 hours and dry quenching. The resulting coke quality was as follows: reactivity CRI of 24.0%, post-reaction strength CSR of 64.5%, and the ash content, sulfur content, and M of the coke were also satisfactory. 40 M 25 M 10 All requirements are met.

[0112] Example 3: 18% Russian A coal was added, as shown in Table 4:

[0113] Table 4: 18% of Russian A-grade coal is incorporated.

[0114] Proportion 18％ 10％ 8％ 12％ 20％ 32％

[0115] The Russian A coal is blended with other coking coals in a certain proportion, and the proportions of each coal and their weight percentages are as follows: increase the proportion of Russian A coal to 18%, gas coal 10%, reduce the proportion of coking coal to 20%, 1 / 3 coking coal A 20%, and lean coal 32%.

[0116] The quality indicators of the blended coal were determined as follows: ash content 9.65%, volatile matter 28.36%, sulfur content 0.77%, caking index G 63.5, active-inert ratio 1.23, and MCI value 2.97, meeting production requirements. The blended coal was then pulverized, with 89% of the pulverized coal being smaller than 3mm; it was then compacted, with a compacted bulk density of 1.03 t / m³. 3 Production experiments were conducted on a 5.5m tamping coke oven with a coking time of 26 hours and dry quenching. The resulting coke quality was as follows: reactivity CRI of 23.8%, post-reaction strength CSR of 65.2%, and the ash content, sulfur content, and M of the coke were also satisfactory. 40 M 25 M 10 All requirements are met.

[0117] Example 4: 18% Russian B coal was added, with the specific proportions shown in Table 5.

[0118] Table 5. Russian B coal blending at 18%

[0119] Proportion 18％ 10％ 8％ 12％ 20％ 32％

[0120] The Russian B coal was blended with other coking coals in a certain proportion, and the weight percentages of each coal were as follows: Russian B coal 18%, gas coal 10%, fat coal 20%, 1 / 3 coking coal A 20%, and lean coal 32%.

[0121] The quality indicators of the blended coal were determined as follows: ash content 9.65%, volatile matter 28.11%, sulfur content 0.8%, caking index G 64.3, active-inert ratio 1.36, and MCI value 2.69, meeting production requirements. The blended coal was then pulverized, with 89.9% of the particles smaller than 3mm remaining. It was then compacted, with a compacted bulk density of 1.03 t / m³. 3 Production experiments were conducted on a 5.5m tamping coke oven with a coking time of 26 hours and dry quenching. The resulting coke quality is as follows: Reactivity (CRI) 22.8%, Post-reaction Strength (CSR) 68.3%, and ash, sulfur, and Mg content of the coke. 40 M 25 M10 All requirements are met.

[0122] Example 5: 18% Russian C coal was added, with the specific proportions shown in Table 6.

[0123] Table 6: Russian C coal blending at 18%

[0124] Proportion 18％ 10％ 8％ 12％ 20％ 32％

[0125] The Russian C coal was blended with other coking coals in a certain proportion, and the weight percentages of each coal are as follows: Russian C coal 18%, gas coal 10%, fat coal 20%, 1 / 3 coking coal A 20%, and lean coal 32%.

[0126] The quality indicators of the blended coal were determined as follows: ash content 9.45%, volatile matter 29.11%, sulfur content 0.79%, caking index G 63, active-inert ratio 1.10, and MCI value 2.97, meeting production requirements. The blended coal was then pulverized, with 89.9% of the particles smaller than 3mm remaining. It was then compacted, with a compacted bulk density of 1.03 t / m³. 3 Production experiments were conducted on a 5.5m tamping coke oven with a coking time of 26 hours and dry quenching. The resulting coke quality is as follows: Reactivity (CRI) 21.1%, Post-reaction Strength (CSR) 72.5%, and ash, sulfur, and Mg content of the coke. 40 M 25 M 10 All requirements are met.

[0127] Example 6: Add 20% Russian A coal, the specific ratio is shown in Table 7:

[0128] Table 7. 20% of Russian A-grade coal is incorporated.

[0129] Proportion 20％ 25％ 13％ 10％ 21％ 11％

[0130] The Russian A coal was blended with other coking coals in a certain proportion, and the weight percentages of each coal were as follows: Russian A coal 20%, 1 / 3 coking coal A 25%, coking coal 23%, lean coal 21%, and semi-lean coal 11%.

[0131] The quality indicators of the blended coal were determined as follows: ash content 9.69%, volatile matter 28.5%, sulfur content 0.78%, and caking index (G) 68. The active-inert ratio was 1.16, and the MCI value was 3.53, meeting production requirements. The blended coal was then pulverized, with 90% of the pulverized coal being smaller than 3mm; it was then compacted, with a compacted bulk density of 1.03 t / m³. 3 Production experiments were conducted on a 5.5m tamping coke oven with a coking time of 26 hours and dry quenching. The resulting coke quality is as follows: Reactivity (CRI) 22.91%, Post-reaction Strength (CSR) 67.26%, and ash, sulfur, and Mg content of the coke.40 M 25 M 10 All requirements are met.

[0132] Example 7: 20% Russian C coal was added, with the specific proportions shown in Table 8.

[0133] Table 8. 20% of Russian C coal is used in the blend.

[0134] Proportion 20％ 25％ 13％ 10％ 21％ 11％

[0135] The Russian C coal was blended with other coking coals in a certain proportion, and the weight percentages of each coal were as follows: Russian C coal 20%, 1 / 3 coking coal A 25%, coking coal 23%, lean coal 21%, and semi-lean coal 11%.

[0136] The quality indicators of the blended coal were determined as follows: ash content 9.51%, volatile matter 28.79%, sulfur content 0.80%, and caking index (G) 65.39. The active-inert ratio was 1.10, and the MCI value was 3.28, meeting production requirements. The blended coal was then pulverized, with 90% of the pulverized coal being smaller than 3mm; it was then compacted, with a compacted bulk density of 1.03 t / m³. 3 Production experiments were conducted on a 5.5m tamping coke oven with a coking time of 26 hours and dry quenching. The resulting coke quality is as follows: Reactivity (CRI) 22.45%, Post-reaction Strength (CSR) 70.2%, and ash, sulfur, and Mg content of the coke. 40 M 25 M 10 All requirements are met.

[0137] Comparative Example 1: 15% Russian A coal was added, as shown in Table 9.

[0138] Table 9: 15% Russian A-grade coal blending

[0139] Proportion 15％ 8％ 6％ 10％ 4％ 11％ 15％ 31％

[0140] The Russian A coal was blended with other coking coals in a certain proportion, and the weight percentages of each coal were as follows: Russian A coal 15%, gas coal 14%, coking coal 25%, 1 / 3 coking coal A 15%, and lean coal 31%.

[0141] The quality indicators of the blended coal were determined as follows: ash content 9.52%, volatile matter 28.01%, sulfur content 0.76%, caking index (G) 56, active-inert ratio 1.08, and MCI 3.10. The blended coal was then pulverized, with 88.9% of the particles smaller than 3mm remaining. It was then compacted, with a compacted bulk density of 1.03 t / m³. 3Production experiments were conducted on a 5.5m tamping coke oven with a coking time of 26 hours and dry quenching. The resulting coke had the following quality: a reactivity ratio (CRI) of 28.1% and a post-reaction strength (CSR) of 61.8%.

[0142] Compared with Example 1, it can be seen that the caking index of coking coal B is lower than that of coking coal A. Therefore, the caking index of the blended coal is less than 60, resulting in the coke strength being unqualified.

[0143] Comparative Example 2: 18% Russian A coal was added, and 1 / 3 coking coal with a high alkali metal catalytic index (MCI) was used. The specific ratio is shown in Table 10.

[0144] Table 10: 18% of Russian A-grade coal is used.

[0145] Proportion 18％ 10％ 8％ 12％ 20％ 32％

[0146] The Russian A coal was blended with other coking coals in a certain proportion, and the weight percentages of each coal are as follows: Russian A coal 18%, gas coal 10%, coking coal 20%, 1 / 3 coking coal B 20%, and lean coal 32%.

[0147] The quality indicators of the blended coal were determined as follows: ash content 9.61%, volatile matter 28.62%, sulfur content 0.82%, caking index G 63.2, active-inert ratio 1.37, and MCI 4.08. The blended coal was then pulverized, with 89.9% of the particles smaller than 3mm remaining. It was then compacted, with a compacted bulk density of 1.03 t / m³. 3 A production experiment was conducted on a 5.5m tamping coke oven with a coking time of 26 hours and dry quenching. The resulting coke quality was as follows: the reactivity index (CRI) was 26.8%, and the post-reaction strength (CSR) was 58.7%, indicating that the coke quality was substandard.

[0148] Compared with Example 3, it can be seen that after using 1 / 3 coking coal B with a higher alkali metal mineral catalytic index, the MCI value of the blended coal exceeds 4, and the hot strength of the coke does not meet the requirements.

[0149] Comparative Example 3: 18% Russian A coal was added, and a portion of the B coal was replaced by high-activity-to-inertia coking coal C. The specific proportions are shown in Table 11.

[0150] Table 11. Russian A-coal blending at 18%

[0151] Proportion 18％ 10％ 8％ 6％ 6％ 20％ 32％

[0152] The Russian A coal was blended with other coking coals in a certain proportion, and the weight percentages of each coal are as follows: Russian A coal 18%, gas coal 10%, fat coal 20%, 1 / 3 coking coal A 20%, and lean coal A 32%.

[0153] The quality indicators of the blended coal were determined as follows: ash content 9.60%, volatile matter 29.50%, sulfur content 0.76%, caking index (G) 65, active-inert ratio 1.65, and MCI 3.15. The blended coal was then pulverized, with 89% of the pulverized coal being smaller than 3mm. It was then compacted, with a compacted bulk density of 1.03 t / m³. 3 A production experiment was conducted on a 5.5m tamping coke oven with a coking time of 26 hours and dry quenching. The resulting coke quality was as follows: Reactivity Ratio (CRI) was 27.9%, and Post-Reaction Strength Ratio (CSR) was 60.2%. Comparison with Example 3 shows that using a higher active-inert ratio (ARI) in the coking coal resulted in an ARI exceeding 1.4 in the blended coal, leading to unsatisfactory coke strength.

[0154] Test case

[0155] To investigate the relationship between the hot strength of coke after a large proportion of Russian coal is incorporated and the active-inert ratio and MCI value of the blended coal, coal was blended according to the table below, and the blended coal indicators were tested using the methods described above.

[0156] Experimental results: as shown in Table 12.

[0157] Table 12 Activated-Inertia Ratio, MCI Value, and Hot State of Coke in Blended Coal

[0158]

[0159] Figure 1 The experiment showed the relationship between the active-inert ratio, MCI value and CSR of the blended coal. It can be seen that the active-inert ratio and MCI value of the blended coal are inversely proportional to the CSR strength of the coke after reaction. However, as can be seen from the second experimental group in Table 12, the active-inert ratio and MCI value are not necessarily better the lower they are. In order to obtain coke with higher hot state, the blended coal should meet the requirements of an active-inert ratio of 1.0 to 1.4 and an MCI value ≤ 4.

[0160] The above embodiments are merely illustrative of the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein, without departing from the spirit and substance defined by the claims of the present invention; and such modifications or substitutions are still within the scope defined by the claims of the present invention.

Claims

1. A method for producing coke using Russian coal, characterized in that, The method includes the following steps: (1) Russian coal and other coking coal are blended in the following weight percentages: Russian coal 15%~20%, lean coal 20%~35%, lean coal 0~15%, 1 / 3 coking coal 15%~25%, gas coal 0~18%, fat coal 5~25%, coking coal 0~15%, to obtain blended coal; Among them, Russian coal meets the following criteria: volatile matter 28%~40%, G value ≥90, CSR of 40kg coke produced by small coke oven of single type of coal ≥20%, active-inert ratio ≥5, MCI value ≥6; The quality indicators of the obtained blended coal meet the following requirements: active-inert ratio 1.0~1.4, MCI value ≤4, G value ≥60; (2) Coal preparation and coking production: The blended coal is crushed, then compacted, and coked in a compacted coke oven to obtain coke. in: Gas coal must meet the following specifications: volatile matter 28%~40%, G value ≥40, CSR of 40kg coke produced by small coke oven of single type of coal ≥35%, active-inert ratio <5, MCI value <6. The following indicators must be met for coking coal: volatile matter 10%~37%, G value ≥85, CSR of 40kg coke produced by small coke oven of single type of coal ≥55%, active-inert ratio <5, MCI value <6. Coking coal must meet the following specifications: volatile matter 10%~28%, G value ≥80, CSR of 40kg coke produced by small coke ovens of a single type of coal ≥50%, live-in-inert ratio <5, MCI value <6. 1 / 3 coking coal meets the following indicators: volatile matter 28%~37%, G value ≥65, CSR of coke produced by small coke ovens of 40kg single type of coal ≥45%, active-inert ratio <5, MCI value ≤4; Lean coal meets the following criteria: volatile matter 10%~20%, G value ≤20, active-inert ratio <5, MCI value <6; Lean coal must meet the following criteria: volatile matter 10%~20%, G value ≥40, CSR of 40kg coke produced in a small coke oven ≥20%, active-inert ratio <5, MCI value <6. in, The active-inert ratio is calculated according to Formula 1: (Equation 1) The active / inert ratio (A / I) represents the ratio of active components to inert components in a single type of coal or a blended coal, with vitrinite (V), %, cinnamic acid (E), %, inert acid (I), %, and minerals, %. The MCI value is calculated according to Equation 2: (Equation 2) Where MCI is the mineral catalytic index, Fe2O3, Na2O, K2O, CaO, MgO, SiO2, Al2O3, and TiO2 are the mass fractions (%) of each metal element in the ash composition. A d V d , which are the mass fractions of dry basis ash and volatile matter in the coal, respectively.

2. The method according to claim 1, characterized in that, Russian coal meets the following specifications: ash content 9%~11%, volatile matter 33%~38%, sulfur content 0.2%~0.6%, G value ≥90, Y value ≥14, CSR of 40kg coke produced by small coke oven of single type of coal is 20%~35%, active-inert ratio is 5~15, and MCI value is ≥6; The gas coal meets the following specifications: ash content 6.5%~9%, volatile matter 35%~40%, sulfur content 0.45%~0.55%, G value ≥65, Y value ≥11, CSR of 40kg coke for small coke ovens of single coal type is 35%~40%, active-inert ratio 0.95~1.1, MCI value 3~6; The coking coal meets the following specifications: ash content 5%~12%, volatile matter 27%~37%, sulfur content 0.4%~4.0%, G value ≥90, Y value ≥24, CSR of 40kg coke produced by small coke oven of single type of coal is 55%~70%, active-inert ratio is 1~4, and MCI value is 2.5~5.5; Coking coal must meet the following specifications: ash content 10%~10.5%, volatile matter 20%~28%, sulfur content 0.6%~0.8%, G value ≥80, Y value ≥19, CSR of 40kg coke produced by small coke ovens of a single type of coal 50%~70%, active-inert ratio 3~4, and MCI value 2.5~3.5; 1 / 3 coking coal meets the following specifications: ash content 8%~9%, volatile matter 30%~37%, sulfur content 0.3%~0.5%, G value ≥80, Y value ≥18, CSR of 40kg coke produced by small coke oven of single type of coal is 45%~55%, active-inert ratio is 1~1.5, and MCI value is 2.8~3.2; The lean coal meets the following specifications: ash content 9.5%~11%, volatile matter 13%~15%, sulfur content 0.4%~0.7%, G value <15, Y value ≥4, active-inert ratio 0.4~0.6, MCI value 1~3; The lean coal meets the following specifications: ash content 10%~11%, volatile matter 16%~18%, sulfur content 0.6%~0.8%, G value ≥65, Y value ≥8, the CSR of 40kg coke produced by small coke ovens of a single type of coal is 40%~50%, the active-inert ratio is 0.8~1.0, and the MCI value is 3~3.

5.

3. The method according to claim 1, characterized in that, Russian coal is blended with other coking coals in the following weight percentages: Russian coal 15-16%, gas coal 13-15%, fat coal 13-15%, coking coal 10-12%, 1 / 3 coking coal 15-16%, and lean coal 30-32%.

4. The method according to claim 1, characterized in that, Russian coal is blended with other coking coals in the following weight percentages: Russian coal 18-19%, gas coal 10-12%, fat coal 20-22%, 1 / 3 coking coal 20-22%, and lean coal 30-32%.

5. The method according to claim 1, characterized in that, Russian coal is blended with other coking coals in the following weight percentages: Russian coal 19-20%, 1 / 3 coking coal 24-25%, fat coal 12-14%, coking coal 10-12%, lean coal 20-22%, and semi-lean coal 10-12%.

6. The method according to claim 1, characterized in that, The coke obtained in step (2) meets the following quality indicators: ash content ≤12%, sulfur content ≤0.70%, M 40 ≥82%, M 25 ≥92%, M 10 ≤6.5%, CRI≤28%, CSR≥64%.

7. A type of coke, characterized in that, Produced using the coke production method with Russian coal as described in any one of claims 1-6.

8. A blended coal for coke production, characterized in that, In the blended coal, the weight percentages of various coking coals are as follows: Russian coal 15%~20%, lean coal 20%~35%, semi-lean coal 0%~15%, 1 / 3 coking coal 15%~25%, gas coal 0%~18%, fat coal 5%~25%, and coking coal 0%~15%; The quality indicators of the blended coal meet the following requirements: active-inert ratio 1.0~1.4, MCI value ≤4, G value ≥60; in: Russian coal meets the following specifications: volatile matter 28%~40%, G value ≥90, CSR of 40kg coke produced by small coke oven of single type of coal ≥20%, active-inert ratio ≥5, MCI value ≥6; Gas coal must meet the following specifications: volatile matter 28%~40%, G value ≥40, CSR of 40kg coke produced by small coke oven of single type of coal ≥35%, active-inert ratio <5, MCI value <6. The following indicators must be met for coking coal: volatile matter 10%~37%, G value ≥85, CSR of 40kg coke produced by small coke oven of single type of coal ≥55%, active-inert ratio <5, MCI value <6. Coking coal must meet the following specifications: volatile matter 10%~28%, G value ≥80, CSR of 40kg coke produced by small coke ovens of a single type of coal ≥50%, live-in-inert ratio <5, MCI value <6. 1 / 3 coking coal meets the following indicators: volatile matter 28%~37%, G value ≥65, CSR of coke produced by small coke ovens of 40kg single type of coal ≥45%, active-inert ratio <5, MCI value ≤4; Lean coal meets the following criteria: volatile matter 10%~20%, G value ≤20, active-inert ratio <5, MCI value <6; Lean coal must meet the following criteria: volatile matter 10%~20%, G value ≥40, CSR of 40kg coke produced in a small coke oven ≥20%, active-inert ratio <5, MCI value <6. in, The active-inert ratio is calculated according to Formula 1: (Equation 1) The active / inert ratio (A / I) represents the ratio of active components to inert components in a single type of coal or a blended coal, with vitrinite (V), %, cinnamic acid (E), %, inert acid (I), %, and minerals, %. The MCI value is calculated according to Equation 2: (Equation 2) Where MCI is the mineral catalytic index, Fe2O3, Na2O, K2O, CaO, MgO, SiO2, Al2O3, and TiO2 are the mass fractions (%) of each metal element in the ash composition. A d V d , which are the mass fractions of dry basis ash and volatile matter in the coal, respectively.

9. The blended coal for coke production according to claim 8, wherein: Russian coal meets the following specifications: ash content 9%~11%, volatile matter 33%~38%, sulfur content 0.2%~0.6%, G value ≥90, Y value ≥14, CSR of 40kg coke produced by small coke oven of single type of coal is 20%~35%, active-inert ratio is 5~15, and MCI value is ≥6; The gas coal meets the following specifications: ash content 6.5%~9%, volatile matter 35%~40%, sulfur content 0.45%~0.55%, G value ≥65, Y value ≥11, CSR of 40kg coke for small coke ovens of single coal type is 35%~40%, active-inert ratio 0.95~1.1, MCI value 3~6; The coking coal meets the following specifications: ash content 5%~12%, volatile matter 27%~37%, sulfur content 0.4%~4.0%, G value ≥90, Y value ≥24, CSR of 40kg coke produced by small coke oven of single type of coal is 55%~70%, active-inert ratio is 1~4, and MCI value is 2.5~5.5; Coking coal must meet the following specifications: ash content 10%~10.5%, volatile matter 20%~28%, sulfur content 0.6%~0.8%, G value ≥80, Y value ≥19, CSR of 40kg coke produced by small coke ovens of a single type of coal 50%~70%, active-inert ratio 3~4, and MCI value 2.5~3.5; 1 / 3 coking coal meets the following specifications: ash content 8%~9%, volatile matter 30%~37%, sulfur content 0.3%~0.5%, G value ≥80, Y value ≥18, CSR of 40kg coke produced by small coke oven of single type of coal is 45%~55%, active-inert ratio is 1~1.5, and MCI value is 2.8~3.2; The lean coal meets the following specifications: ash content 9.5%~11%, volatile matter 13%~15%, sulfur content 0.4%~0.7%, G value <15, Y value ≥4, active-inert ratio 0.4~0.6, MCI value 1~3; The lean coal meets the following specifications: ash content 10%~11%, volatile matter 16%~18%, sulfur content 0.6%~0.8%, G value ≥65, Y value ≥8, the CSR of 40kg coke produced by small coke ovens of a single type of coal is 40%~50%, the active-inert ratio is 0.8~1.0, and the MCI value is 3~3.

5.

10. The coking coal for coke production according to claim 8 or 9, characterized in that, In the blended coal, the weight percentages of various coking coals are as follows: Russian coal 15-16%, gas coal 13-15%, fat coal 13-15%, coking coal 10-12%, 1 / 3 coking coal 15-16%, and lean coal 30-32%; or Russian coal 18-19%, gas coal 10-12%, fat coal 20-22%, 1 / 3 coking coal 20-22%, lean coal 30-32%; or Russian coal 19-20%, 1 / 3 coking coal 24-25%, fat coal 12-14%, coking coal 10-12%, lean coal 20-22%, and semi-lean coal 10-12%.

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