Coking coal blending method by matching Russian coal and northeast coal

Abstract

The invention discloses a Russian coal and northeast coal matched coking coal blending method, and relates to various Russian coal and northeast coal matched coking coal blending methods. According to the invention, the ratio of five kinds of Russian coking coal to northeast coking coal is adjusted, and the indexes of the mixed coal are controlled as follows: the volatile component Vdaf is 29%-31%, the maximum fluidity alpha max is 4000-6000 ddpm, the active-inert ratio is 1-2.0, the ash component catalytic index MCI value is less than or equal to 4%, and the coke CSR is greater than or equal to 38% when a 40kg small coke oven is used for coking. According to the invention, the blending of five Russian coking coals is realized, the total proportion reaches 52-59%, the coal source is expanded, the resource shortage situation of the coking coals in the northeast region is greatly relieved, and meanwhile, the utilization value of the Russian coals is also greatly improved. The method is applied to the field of coking coal blending in the coking industry.

Description

Technical Field

[0001] The invention relates to a coking coal blending method of combining Russian coal with Northeast coal. Background Art

[0002] While my country's coal resources are relatively abundant, they are unevenly distributed and high-quality coking coal is scarce. Coking coal (hereinafter referred to as Northeast coking coal) reserves in the Northeast provinces of Heilongjiang, Jilin, and Liaoning are also relatively small. Fat coal, coking coal, and lean coal are particularly scarce, especially due to their low fluidity and poor cohesion. These resources are insufficient for steel production in the Northeast, necessitating importation from other regions.

[0003] Russia has proven recoverable coal reserves of 157.01 billion tons, accounting for approximately 17.3% of the world's recoverable reserves, ranking second only to the United States. Russian coal is easy to mine, low-cost, and offers a wide variety of coal types, from long flame coal to anthracite. Coking coal, in particular, boasts significant reserves and a wide variety. Since March 2022, China's imports of Russian coking coal have remained high, reaching a record high of 3.0537 million tons in April. In 2023, Russian coking coal accounted for 25.7% of total coking coal imports, becoming a vital supplementary resource for domestic coking coal.

[0004] Russian coking coal generally has medium-to-high ash content and low sulfur content. Coking coal and fat coal, among others, offer advantages such as strong bonding, high G values, and good Y values. However, they also suffer from disadvantages such as low metamorphism, high vitrinite content, and a high catalytic index of ash components. This combination results in a decrease in the thermal strength (CSR) of the coke. Therefore, a coking coal blending method for combining Russian coal with domestic coking coal is urgently needed. Summary of the Invention

[0005] In response to the above-mentioned existing problems, the present invention provides a coking coal blending method that combines multiple Russian coals with Northeast coals. Multiple and different types of Russian coals are scientifically blended with coking coal from the Northeast region to complement each other, expand coal resources, and reduce coke costs while improving coke quality.

[0006] The coking coal blending method of the present invention using Russian coal and Northeast coal is carried out according to the following steps:

[0007] 1. Pre-crush Russian S coal and gas coal separately;

[0008] 2. The blended coal is composed of 5% to 18% by weight of Russian E coal, 7% to 14% by weight of Russian I coal, 8% to 15% by weight of Russian G coal, 12% to 22% by weight of Russian K coal, 6% to 10% by weight of crushed Russian S coal, 10% to 17% by weight of coking coal, 21% to 26% by weight of 1 / 3 coking coal, and 5% to 10% by weight of crushed gas coal. The sum of the components is 100%, and the total proportion of the five Russian coals in the blended coal is 52% to 59%. The blended coal indicators are: volatile matter V daf At 29% to 31%, the maximum fluidity α max The ash content is 4000-6000 ddpm, the active-inert ratio is 1-2.0, the ash catalytic index MCI value is ≤4%, and the CSR of 40kg small coke oven coking coke is ≥38%;

[0009] 3. The blended coal is crushed and then loaded into the production coke oven for coking by tamping. The coke is taken out after 25 to 30 hours of coking and dry quenching is used to obtain coke.

[0010] The present invention utilizes the respective characteristics of various Russian coking coals and combines them with Northeast coking coal, and realizes reasonable and scientific matching by controlling key indicators such as the active-inert ratio and the ash component catalytic index MCI value.

[0011] Beneficial effects of the present invention:

[0012] 1. The company has achieved the blending of five types of Russian coking coal, with a total proportion of 52% to 59%. This has expanded the coal source, greatly alleviated the shortage of coking coal resources in Northeast China, and greatly increased the utilization value of Russian coal.

[0013] 2. The price of Russian coking coal is relatively low. After using it in large proportion, the cost of coke raw materials is greatly reduced, which significantly increases the profit margin of the enterprise.

[0014] 3. The present invention adjusts the proportion of each single coking coal to control the blended coal index as follows: Volatile matter V daf At 29% to 31%, the maximum fluidity α max The ash content is 4000-6000 ddpm, the active-inert ratio is 1-2.0, the ash catalytic index MCI value is ≤4%, and the CSR of 40kg small coke oven coking coke is ≥38%.

[0015] 4. The thermal strength CSR of the coke obtained by the present invention reaches more than 63%, M25 reaches more than 93%, M10 is less than 4.5%, and meets the requirements of 1500m 3 The above blast furnace demand. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a technical flow chart of the present invention. DETAILED DESCRIPTION

[0017] Specific embodiment 1: The coking coal blending method of this embodiment of the invention is carried out according to the following steps:

[0018] 1. Pre-crush Russian S coal and gas coal respectively; the proportion of particles with a diameter of less than 3 mm reaches 80% to 85%, and the proportion of particles with a diameter of less than 0.5 mm is ≤ 40%;

[0019] 2. The blended coal is composed of 5% to 18% by weight of Russian E coal, 7% to 14% by weight of Russian I coal, 8% to 15% by weight of Russian G coal, 12% to 22% by weight of Russian K coal, 6% to 10% by weight of Russian S coal, 10% to 17% by weight of coking coal, 21% to 26% by weight of 1 / 3 coking coal, and 5% to 10% by weight of gas coal. The sum of the components is 100%, and the total proportion of the five types of Russian coal in the blended coal is 52% to 59%. The blended coal indicators are: volatile matter V daf At 29% to 31%, the maximum fluidity α max The ash content is 4000-6000 ddpm, the active-inert ratio is 1-2.0, the ash catalytic index MCI value is ≤4%, and the CSR of 40kg small coke oven coking coke is ≥38%;

[0020] 3. The blended coal is crushed to a particle size of 89% to 92% with a particle size of less than 3 mm. The coal is then loaded into a production coke oven for coking using a tamping method. The coke is removed after 25 to 30 hours of coking and dry quenching is used to obtain coke.

[0021] Specific embodiment 2: This embodiment differs from the specific embodiment 1 in that the volatile matter V of Russian E coal daf At 36% to 37%, G value ≥ 95, Y value 28 to 30 mm, it is defined as fat coal; other indicators are: ash content A d 10% to 11%, sulfur content S t 0.2% to 0.4%, maximum fluidity α max The ddpm is 20,000 to 40,000, the active-inert ratio is 7 to 9, the ash catalytic index (MCI) is 5.5% to 7.5%, and the CSR of 40 kg small coke oven coke from a single type of coal is 36% to 40%. Other aspects are the same as those of the first embodiment.

[0022] Specific embodiment 3: This embodiment differs from specific embodiment 1 or 2 in that: the volatile matter V of Russian I coal daf At 32% to 34%, G value ≥ 98, Y value 30 to 32 mm, it is defined as fat coal; other indicators are: ash content A d 10% to 11%, sulfur content S t 0.4% to 0.5%, maximum fluidity α maxThe ddpm is 30,000 to 50,000, the active-inert ratio is 9 to 12, the ash catalytic index (MCI) is 4.5% to 6%, and the CSR of 40 kg small coke oven coke from a single type of coal is 30% to 34%. Other aspects are the same as those of the first or second embodiment.

[0023] Specific embodiment 4: This embodiment differs from specific embodiments 1 to 3 in that the volatile matter V of Russian G coal daf At 37% to 38%, G value ≥ 90, Y value 17 to 20 mm, it is defined as gas coal; other indicators are: ash content A d 8-9%, sulfur content S t 0.6% to 0.7%, maximum fluidity α max The ddpm is 9000-13000, the active-inert ratio is 9-12, the ash catalytic index MCI value is 4.5%-6%, and the CSR of 40kg small coke oven coke of single coal is 28%-32%. Other aspects are the same as those of the first to third embodiments.

[0024] Specific embodiment 5: This embodiment differs from specific embodiments 1 to 4 in that the volatile matter V of Russian K coal daf In the range of 18% to 20%, G value of 75 to 80, and Y value of 10 to 11 mm, it is defined as coking coal; other indicators are: ash content A d 10% to 11%, sulfur content S t 0.2% to 0.3%, maximum fluidity α max The ddpm is 0-50, the active-inert ratio is 2-3, the ash catalytic index MCI value is 1%-3%, and the CSR of 40kg small coke oven coke of single coal is 35%-38%. Other aspects are the same as those of the first to fourth embodiments.

[0025] Specific embodiment 6: This embodiment differs from specific embodiments 1 to 5 in that the volatile matter V of Russian S coal daf At 14% to 17%, G value is 0, Y value is 0mm, which is defined as lean coal; other indicators are: ash content A d 9.5% to 11%, sulfur content S t 0.2% to 0.3%, maximum fluidity α max The catalyst content is 0 ddpm, the active-inert ratio is 1-2, the ash catalytic index (MCI) is 2%-3%, and the CSR of 40 kg small coke oven coke produced from a single type of coal is 0%. Other aspects are the same as those of the first to fifth embodiments.

[0026] In the above implementation mode, the classification and definition are performed according to GBT 5751-2009 China Coal Classification.

[0027] Specific Embodiment 7: This embodiment differs from Specific Embodiments 1 to 6 in that the blended coal in step 2 is composed of 18% by weight of Russian E coal, 8% of Russian I coal, 8% of Russian G coal, 17% of Russian K coal, 7% of Russian S coal, 11% of coking coal, 26% of 1 / 3 coking coal, and 5% of gas coal. Other aspects are the same as Specific Embodiments 1 to 6.

[0028] Specific Embodiment 8: This embodiment differs from Specific Embodiments 1 to 7 in that the blended coal in step 2 is composed of 5% by weight of Russian E coal, 10% of Russian I coal, 12% of Russian G coal, 19% of Russian K coal, 6% of Russian S coal, 12% of coking coal, 26% of 1 / 3 coking coal, and 10% of gas coal. Other aspects are the same as Specific Embodiments 1 to 7.

[0029] Specific Embodiment 9: This embodiment differs from Specific Embodiments 1 to 8 in that the blended coal in step 2 is composed of 16% by weight of Russian E coal, 7% of Russian I coal, 8% of Russian G coal, 22% of Russian K coal, 6% of Russian S coal, 10% of coking coal, 26% of 1 / 3 coking coal, and 5% of gas coal. Other aspects are the same as Specific Embodiments 1 to 8.

[0030] Specific Embodiment 10: This embodiment differs from Specific Embodiments 1 to 9 in that the blended coal in step 2 is composed of 5% by weight of Russian E coal, 14% of Russian I coal, 12% of Russian G coal, 12% of Russian K coal, 10% of Russian S coal, 17% of coking coal, 25% of 1 / 3 of coking coal, and 5% of gas coal. Other aspects are the same as Specific Embodiments 1 to 9.

[0031] Specific Embodiment 11: This embodiment differs from Specific Embodiments 1 to 10 in that the blended coal in step 2 is composed of 7% by weight of Russian E coal, 10% of Russian I coal, 15% of Russian G coal, 16% of Russian K coal, 9% of Russian S coal, 17% of coking coal, 21% of 1 / 3 of coking coal, and 5% of gas coal. Other aspects are the same as Specific Embodiments 1 to 10.

[0032] The content of the present invention is not limited to the content of the above-mentioned embodiments. The combination of one or more specific embodiments can also achieve the purpose of the invention.

[0033] Example 1: The coking coal blending method of Russian coal and Northeast coal is as follows:

[0034] Russian S lean coal and Northeast China C gas coal were pre-crushed separately, achieving a proportion of 82% smaller than 3mm, with 38% smaller than 0.5mm. The five Russian coking coals were then blended with three Northeast China coking coals by weight, as shown in Table 2. Mixing Ratio 1: 18% E fat coal, 8% I fat coal, 8% G1 / 3 coking coal, 17% K coking coal, 7% S lean coal, 11% Northeast China A coking coal, 26% Northeast China B1 / 3 coking coal, and 5% Northeast China C gas coal. The total proportion of the five Russian coals was 58%, and the total proportion of Northeast China coking coal was 42%.

[0035] The above blended coal was crushed again, and the proportion of particles less than 3 mm was 89%, forming a new blended coal. The new blended coal index is shown in Table 3, blended coal 1, as follows: Volatile matter V daf At 30.1%, the maximum fluidity α max The ash content is 5800 ddpm, the active-inert ratio is 1.95, the ash catalytic index (MCI) is 3.9, and the CSR of the coke produced by the 40kg small coke oven is 40.1%. This meets the requirements. Finally, the new blended coal is loaded into the production coke oven by tamping coal charging. After 25 hours of coking, the coke is discharged and dry quenched to obtain coke. The quality of the obtained coke is shown in Table 4 Coke 1. The coke CSR is 63%, M 25 Reached 93%, M 10 4.2%, meeting 1500m 3 The above blast furnace demand.

[0036] Example 2: The coking coal blending method of Russian coal and Northeast coal is as follows:

[0037] Russian S lean coal and Northeast China C gas coal were pre-crushed separately, achieving a proportion of 81.5% of particles smaller than 3mm, with 39% smaller than 0.5mm. The five Russian coking coals were then blended with three Northeast China coking coals by weight, as shown in Table 2. Mixing Ratio 1: 5% E fat coal, 10% I fat coal, 12% G 1 / 3 coking coal, 19% K coking coal, 6% S lean coal, 12% Northeast China A coking coal, 26% Northeast China B 1 / 3 coking coal, and 10% Northeast China C gas coal. The total proportion of the five Russian coals was 52%, and the total proportion of Northeast China coking coal was 48%.

[0038] Furthermore, after the above coal types are mixed, the above mixed coal is crushed again, and the proportion of particles less than 3 mm is 90%, forming a new mixed coal. The new mixed coal indicators are shown in Table 3, mixed coal 2, as follows: Volatile matter V daf At 29.9%, the maximum fluidity α maxThe ash content is 4590 ddpm, the active-inert ratio is 1.90, the ash content catalytic index (MCI) is 3.6, and the CSR of the coke produced by the 40kg small coke oven is 41.3%. This meets the requirements. Finally, the new blended coal is loaded into the production coke oven by tamping coal charging. After 25 hours of coking, the coke is discharged and dry quenched to obtain coke. The quality of the obtained coke is shown in Table 4 Coke 1. The coke CSR is 63.6%, M 25 Reaching 94.1%, M 10 4.2%, meeting 1500m 3 The above blast furnace demand.

[0039] Example 3: A coking blending method for combining Russian and Northeastern coals includes the following: First, Russian S lean coal and Northeastern C gas coal are pre-crushed separately, achieving a proportion of 82% of particles smaller than 3 mm, including 37% of particles smaller than 0.5 mm. Furthermore, the five Russian coking coals are blended with three Northeastern coking coals by weight, as shown in Table 2: Blend 3: 16% E fat coal, 7% I fat coal, 8% G 1 / 3 coking coal, 22% K coking coal, 6% S lean coal, 10% Northeastern A coking coal, 26% Northeastern B 1 / 3 coking coal, and 5% Northeastern C gas coal. The total proportion of the five Russian coals is 57%, and the total proportion of Northeastern coking coal is 43%.

[0040] The above blended coal was crushed again, and the proportion of particles less than 3 mm was 90.5%, forming a new blended coal. The new blended coal index is shown in Table 3, blended coal 3, as follows: Volatile matter V daf At 29.5%, the maximum fluidity α max The ash content is 4870 ddpm, the active-inert ratio is 1.85, the ash content catalytic index (MCI) is 3.0, and the CSR of the coke produced by the 40 kg small coke oven is 42.8%. This meets the requirements. Finally, the new blended coal is loaded into the production coke oven by tamping coal charging. After 25 hours of coking, the coke is discharged and dry quenched to obtain coke. The quality of the obtained coke is shown in Table 4 Coke 1. The coke CSR is 64.1%, M 25 Reached 93.5%, M 10 4.4%, meeting 1500m 3 The above blast furnace demand.

[0041] Example 4: A coking blending method for combining Russian and Northeastern coals is as follows: Russian S lean coal and Northeastern C gas coal are pre-crushed separately, achieving a proportion of 80.8% of particles smaller than 3 mm, with 38% of particles smaller than 0.5 mm. Furthermore, the five Russian coking coals are blended with three Northeastern coking coals by weight, as shown in Table 2: Blend 4: 5% E fat coal, 14% I fat coal, 12% G 1 / 3 coking coal, 12% K coking coal, 10% S lean coal, 17% Northeastern A coking coal, 25% Northeastern B 1 / 3 coking coal, and 5% Northeastern C gas coal. The total proportion of the five Russian coals is 53%, and the total proportion of Northeastern coking coal is 47%.

[0042] Furthermore, after the above coal types are mixed, the above mixed coal is crushed again, and the proportion of particles less than 3 mm is 90.5%, forming a new mixed coal. The indicators of the new mixed coal are shown in Table 3, mixed coal 4, as follows: Volatile matter V daf At 29.0%, the maximum fluidity α max The ash content is 4500 ddpm, the active-inert ratio is 1.9, the ash content catalytic index (MCI) is 3.2, and the CSR of the coke produced by the 40kg small coke oven is 42.6%. This meets the requirements. Finally, the new blended coal is loaded into the production coke oven by tamping coal charging. After 25 hours of coking, the coke is discharged and dry quenched to obtain coke. The quality of the obtained coke is shown in Table 4 Coke 1. The coke CSR is 65.5%, M 25 Reached 94.2%, M 10 3.9%, meeting 1500m 3 The above blast furnace demand.

[0043] Example 5: A coking blending method for combining Russian and Northeastern coals includes the following: First, Russian S lean coal and Northeastern C gas coal are pre-crushed separately, achieving a proportion of 81.0% of particles smaller than 3 mm, including 37% of particles smaller than 0.5 mm. Furthermore, the five Russian coking coals are blended with three Northeastern coking coals by weight, as shown in Table 2: Blend 5: 7% E fat coal, 10% I fat coal, 15% G 1 / 3 coking coal, 16% K coking coal, 9% S lean coal, 17% Northeastern A coking coal, 21% Northeastern B 1 / 3 coking coal, and 5% Northeastern C gas coal. The total proportion of the five Russian coals is 57%, and the total proportion of Northeastern coking coal is 43%.

[0044] The above blended coal was crushed again, and the proportion of particles less than 3 mm was 90.0%, forming a new blended coal. The new blended coal index is shown in Table 3, blended coal 5, as follows: Volatile matter V daf At 29.3%, the maximum fluidity α maxThe ash content is 4350 ddpm, the active-inert ratio is 1.78, the ash catalytic index (MCI) is 2.9, and the CSR of the coke produced by the 40kg small coke oven is 41.9%. This meets the requirements. Finally, the new blended coal is loaded into the production coke oven by tamping coal charging. After 25 hours of coking, the coke is discharged and dry quenched to obtain coke. The quality of the obtained coke is shown in Table 4 Coke 1. The coke CSR is 65.2%, M 25 Reached 94%, M 10 4.2%, meeting 1500m 3 The above blast furnace demand.

[0045] In the above embodiment, Russian coking coal including five varieties of E, I, G, K, and S is selected, and Northeast coking coal including A coking coal, B1 / 3 coking coal, and C gas coal is selected. The specific indicators are shown in Table 1.

[0046] Table 1 Quality indicators and prices of Russian coking coal and Northeast China coking coal

[0047]

[0048] Comparative Example 1:

[0049] The Russian coking coal selected includes five varieties: E, I, G, K, and S. The Northeast coking coal selected includes A coking coal, B1 / 3 coking coal, and C gas coal. The specific indicators are shown in Table 1.

[0050] Russian S lean coal and Northeast China C gas coal were pre-crushed separately, achieving a proportion of 82% smaller than 3mm, with 39% smaller than 0.5mm. The five Russian coking coals were then blended with three Northeast China coking coals by weight, as shown in Table 2. Mix 6: 20% E fat coal, 8% I fat coal, 8% G 1 / 3 coking coal, 10% K coking coal, 7% S lean coal, 16% Northeast China A coking coal, 26% Northeast China B 1 / 3 coking coal, and 5% Northeast China C gas coal. The total proportion of the five Russian coals was 53%, and the total proportion of Northeast China coking coal was 47%.

[0051] Furthermore, after the above coal types are mixed, the above mixed coal is crushed again, and the proportion of particles less than 3 mm is 89%, forming a new mixed coal. The indicators of the new mixed coal are shown in Table 3, mixed coal 6, as follows: Volatile matter V daf At 30.5%, the maximum fluidity α max The ash content is 6390 ddpm, the active-inert ratio is 2.3, the ash content catalytic index MCI value is 4.2, and the CSR of the coke produced by the 40kg small coke oven is 35.4%, which does not meet the requirements. Finally, the new blended coal is loaded into the production coke oven by tamping coal charging method for coking. After the coking time is 25 hours, the coke is discharged and the coke is obtained by dry quenching. The quality of the obtained coke is shown in Table 4 Coke 6, the coke CSR is 59.7%, M 25 Reached 91.5%, M10 5.5%, not meeting 1500m 3 The above blast furnace demand.

[0052] Compared with Example 1, the main difference between Comparative Example 1 is that the ratio of Russian E fat coal and K coking coal is unreasonable, which exceeds the technical requirements, resulting in an active-inert ratio of 2.6, an MCI index of 4.2, and a CSR of only 35.4%, which does not meet the requirements of the control index of the blended coal, resulting in the CSR and M of the coke being too low. 25 and M 10 , all do not meet 1500m 3 The above blast furnace demand.

[0053] Comparative Example 2:

[0054] The Russian coking coal selected includes five varieties: E, I, G, K, and S. The Northeast coking coal selected includes A coking coal, B1 / 3 coking coal, and C gas coal. The specific indicators are shown in Table 1.

[0055] Russian S lean coal and Northeast China C gas coal were pre-crushed separately, achieving a proportion of 82% smaller than 3mm, with 37% smaller than 0.5mm. The five Russian coking coals were then blended with three Northeast China coking coals by weight, as shown in Table 2. Mix 3: 16% E fat coal, 7% I fat coal, 10% G1 / 3 coking coal, 24% K coking coal, 6% S lean coal, 8% Northeast China A coking coal, 24% Northeast China B1 / 3 coking coal, and 5% Northeast China C gas coal. The total proportion of the five Russian coals was 63%, and the total proportion of Northeast China coking coal was 37%.

[0056] Furthermore, after the above coal types are mixed, the above mixed coal is crushed again, and the proportion of particles less than 3 mm is 90.5%, forming a new mixed coal. The new mixed coal indicators are shown in Table 3, mixed coal 7, as follows: Volatile matter V daf At 29.5%, the maximum fluidity α max The ash content is 5050 ddpm, the active-inert ratio is 2.2, the ash content catalytic index MCI value is 3.8, and the CSR of the coke produced by the 40kg small coke oven is 37.2%, which does not meet the requirements. Finally, the new blended coal is loaded into the production coke oven by tamping coal charging method for coking. After the coking time is 25 hours, the coke is discharged and the coke is obtained by dry quenching. The quality of the obtained coke is shown in Table 4 Coke 1. The coke CSR is 61.4%, M 25 Reaching 92.6%, M 10 5%, not meeting 1500m 3 The above blast furnace demand.

[0057] The main difference between Comparative Example 2 and Example 3 is that the total proportion of the five Russian coals is 63%, which is too high and exceeds the technical requirement range of 52% to 59%, resulting in an active-inert ratio of 2.2 and a CSR of only 37.2%, which does not meet the control index requirements of the blended coal, resulting in the coke CSR and M 25 and M 10 , all do not meet 1500m 3 The above blast furnace demand.

[0058] Table 2 Coal blending scheme of the embodiment

[0059] variety Coal Type Ratio 1 Ratio 2 Ratio 3 Ratio 4 Ratio 5 Ratio 6 Ratio 7 Russian E coal fat coal 18 5 16 5 7 20 16 Russian I coal fat coal 8 10 7 14 10 8 7 Russian G coal gas coal 8 12 8 12 15 8 10 Russian K coal coking coal 17 19 22 12 16 10 24 Russian S coal lean coal 7 6 6 10 9 7 6 Northeast A coal coking coal 11 12 10 17 17 16 8 Northeast B coal 1 / 3 coking coal 26 26 26 25 21 26 24 Northeast C coal gas coal 5 10 5 5 5 5 5

[0060] Table 3 Coal quality indexes of the embodiment

[0061]

[0062] The active-inert ratio is calculated according to formula 1:

[0063]

[0064] The microscopic components of coal (vitrinite, exinite, inertinite, minerals) are determined in accordance with GBT 8899-2013 "Microscopic components and mineral determination methods of coal".

[0065] The ash component catalytic index MCI value is calculated according to formula 2:

[0066]

[0067] As mentioned above, the 40kg small coke oven coking experiment is in accordance with the standard YB / T 4526-2016 "Technical Specifications for Small Coke Ovens for Coking Tests", and the coke CSR test is in accordance with GBT 4000-2017 "Test Method for Reactivity and Post-Reaction Strength of Coke".

[0068] Table 4 Coke quality indicators of the embodiment

[0069]

[0070]

[0071] The above embodiment realizes the blending of five types of Russian coking coal, with a total proportion of 52% to 59%, which expands the coal source, greatly alleviates the tight situation of coking coal resources in Northeast China, and also greatly improves the utilization value of Russian coal.

Claims

1. A method for coking coal blending using Russian coal and Northeast coal, characterized in that The method is carried out according to the following steps:

1. Pre-crush Russian S coal and gas coal separately; 2. The blended coal is composed of 5% to 18% by weight of Russian E coal, 7% to 14% by weight of Russian I coal, 8% to 15% by weight of Russian G coal, 12% to 22% by weight of Russian K coal, 6% to 10% by weight of Russian S coal, 10% to 17% by weight of coking coal, 21% to 26% by weight of 1 / 3 coking coal, and 5% to 10% by weight of gas coal. The sum of the components is 100%, and the total proportion of the five types of Russian coal in the blended coal is 52% to 59%. The blended coal indicators are: volatile matter V daf At 29% to 31%, the maximum fluidity α max The ash content is 4000-6000 ddpm, the active-inert ratio is 1-2.0, the ash catalytic index MCI value is ≤4%, and the CSR of 40kg small coke oven coking coke is ≥38%; 3. The blended coal is crushed and then loaded into the production coke oven for coking by tamping. The coke is taken out after 25 to 30 hours of coking and dry quenching is used to obtain coke.

2. The method for coking coal blending of Russian coal and Northeast coal according to claim 1, characterized in that: Volatile matter V of Russian E coal daf At 36% to 37%, G value ≥ 95, Y value 28 to 30 mm, it is defined as fat coal; other indicators are: ash content A d 10% to 11%, sulfur content S t 0.2% to 0.4%, maximum fluidity α max The ash content is 20,000 to 40,000 ddpm, the active-inert ratio is 7 to 9, the ash catalytic index MCI value is 5.5% to 7.5%, and the CSR of 40 kg small coke oven coking coke from a single type of coal is 36% to 40%.

3. The method for coking coal blending of Russian coal and Northeast coal according to claim 1, characterized in that: Volatile matter V of Russian I coal daf At 32% to 34%, G value ≥ 98, Y value 30 to 32 mm, it is defined as fat coal; other indicators are: ash content A d 10% to 11%, sulfur content S t 0.4% to 0.5%, maximum fluidity α max The ash content is 30,000 to 50,000 ddpm, the active-inert ratio is 9 to 12, the ash catalytic index MCI value is 4.5% to 6%, and the CSR of 40 kg small coke oven coking coke from a single type of coal is 30% to 34%.

4. The method for coking coal blending of Russian coal and Northeast coal according to claim 1, characterized in that: Volatile matter V of Russian G coal daf At 37% to 38%, G value ≥ 90, Y value 17 to 20 mm, it is defined as gas coal; other indicators are: ash content A d 8-9%, sulfur content S t 0.6% to 0.7%, maximum fluidity α max The ash content is 9000-13000 ddpm, the active-inert ratio is 9-12, the ash catalytic index MCI value is 4.5%-6%, and the CSR of 40kg small coke oven coking coke from a single type of coal is 28%-32%.

5. The method for coking coal blending of Russian coal and Northeast coal according to claim 1, characterized in that: Volatile matter V of Russian K coal daf In the range of 18% to 20%, G value of 75 to 80, and Y value of 10 to 11 mm, it is defined as coking coal; other indicators are: ash content A d 10% to 11%, sulfur content S t 0.2% to 0.3%, maximum fluidity α max The ash content is 0-50 ddpm, the active-inert ratio is 2-3, the ash catalytic index MCI value is 1%-3%, and the CSR of 40 kg small coke oven coking coke from a single type of coal is 35%-38%.

6. The method for coking coal blending of Russian coal and Northeast coal according to claim 1, characterized in that: Volatile matter V of Russian S coal daf At 14% to 17%, G value is 0, Y value is 0mm, which is defined as lean coal; other indicators are: ash content A d 9.5% to 11%, sulfur content S t 0.2% to 0.3%, maximum fluidity α max The ash content is 0ddpm, the active-inert ratio is 1-2, the ash catalytic index MCI value is 2%-3%, and the CSR of 40kg small coke oven coking coke from a single type of coal is 0%.

7. The method for coking coal blending of Russian coal and Northeast coal according to claim 1, characterized in that: In step 2, the blended coal is composed of 18% by weight of Russian E coal, 8% by weight of Russian I coal, 8% by weight of Russian G coal, 17% by weight of Russian K coal, 7% by weight of Russian S coal, 11% by weight of coking coal, 26% by weight of 1 / 3 of coking coal and 5% by weight of gas coal.

8. The method for coking coal blending of Russian coal and Northeast coal according to claim 1, characterized in that: In step 2, the blended coal is composed of 5% by weight of Russian E coal, 10% by weight of Russian I coal, 12% by weight of Russian G coal, 19% by weight of Russian K coal, 6% by weight of Russian S coal, 12% by weight of coking coal, 26% by weight of 1 / 3 of coking coal and 10% by weight of gas coal.

9. The method for coking coal blending of Russian coal and Northeast coal according to claim 1, characterized in that: In step 2, the blended coal is composed of 16% by weight of Russian E coal, 7% by weight of Russian I coal, 8% by weight of Russian G coal, 22% by weight of Russian K coal, 6% by weight of Russian S coal, 10% by weight of coking coal, 26% by weight of 1 / 3 of coking coal and 5% by weight of gas coal.

10. The method for coking coal blending of Russian coal and Northeast coal according to claim 1, characterized in that: In step 2, the blended coal is composed of 5% by weight of Russian E coal, 14% by weight of Russian I coal, 12% by weight of Russian G coal, 12% by weight of Russian K coal, 10% by weight of Russian S coal, 17% by weight of coking coal, 25% by weight of 1 / 3 of coking coal and 5% by weight of gas coal.

Images