CN116731736A - Coal blending coking method for smelting primary metallurgical coke by high-sulfur lean coal - Google Patents
Coal blending coking method for smelting primary metallurgical coke by high-sulfur lean coal Download PDFInfo
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- CN116731736A CN116731736A CN202310758542.4A CN202310758542A CN116731736A CN 116731736 A CN116731736 A CN 116731736A CN 202310758542 A CN202310758542 A CN 202310758542A CN 116731736 A CN116731736 A CN 116731736A
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- 239000003245 coal Substances 0.000 title claims abstract description 163
- 239000000571 coke Substances 0.000 title claims abstract description 126
- 229910052717 sulfur Inorganic materials 0.000 title claims abstract description 65
- 239000011593 sulfur Substances 0.000 title claims abstract description 65
- 238000004939 coking Methods 0.000 title claims abstract description 61
- 238000002156 mixing Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000003723 Smelting Methods 0.000 title claims abstract description 17
- 238000004458 analytical method Methods 0.000 claims abstract description 31
- 238000012360 testing method Methods 0.000 claims abstract description 24
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000001514 detection method Methods 0.000 claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 238000003763 carbonization Methods 0.000 claims description 5
- 239000000084 colloidal system Substances 0.000 claims description 4
- 230000003197 catalytic effect Effects 0.000 claims description 3
- 230000009257 reactivity Effects 0.000 claims description 3
- 210000004317 gizzard Anatomy 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 239000011435 rock Substances 0.000 claims 1
- 230000008961 swelling Effects 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 8
- 230000008901 benefit Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004480 active ingredient Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000000192 social effect Effects 0.000 description 2
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005206 flow analysis Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/04—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition
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- Coke Industry (AREA)
Abstract
The invention discloses a coal blending coking method for smelting primary metallurgical coke by high-sulfur lean coal, which comprises the following steps: determining the quality technical requirements of high-quality metallurgical coke; determining various parameters of metallurgical coke production; comprehensively and systematically analyzing technical performance parameters of the high-sulfur lean coal to be used, and analyzing occurrence forms and contents of sulfur in the high-sulfur lean coal; analyzing performance indexes of the single coal used by the blended coal; determining the basic coal blending proportion of each single coal according to the coal consumption requirement and the coke quality requirement; after the proportion is determined, starting to test the coke oven to verify the proportion; developing an industrial coke oven test on the well-determined proportion, developing quality and detection analysis of smelted coke, adjusting and optimizing a coal blending technical structure according to the coke quality, and determining the final proportion; and forming an operation guide by using the coal blending technical scheme which is tested successfully. The invention solves the technical problems that the high-sulfur thin coking coal is used in a large proportion in the coal blending coking process and the quality requirement of metallurgical coke can be ensured.
Description
Technical Field
The invention relates to the technical field of coking and coal blending production, in particular to a coal blending and coking method for smelting primary metallurgical coke by high-sulfur lean coal.
Background
Metallurgical coke is the most important basic raw material in blast furnace smelting, is a heat source, a reducing agent, a material column framework and a penetrating agent for blast furnace smelting production, and is also the most important parameter adjusting means in the blast furnace production process. In recent years, along with the development and progress of blast furnace smelting technology, particularly the rapid development of large-scale blast furnace volume, high-wind-temperature technology and blast oxygen-enriched coal injection technology, coke is taken as a framework of a material column in the blast furnace, so that the ventilation and liquid permeation effects in the blast furnace are more outstanding. The quality of metallurgical coke has great influence on the modern blast furnace smelting process, and becomes a key factor for limiting the stable, balanced, high-quality and high-efficiency production of molten iron by the blast furnace.
The coking coal variety in China has unreasonable structure, wherein the main coking coal resources such as fat coal, coking coal and the like have less reserves, and the structural contradiction is very prominent. Meanwhile, coking coal varieties are uneven in structure and uneven in regional distribution, and are mainly distributed in North China and south China coal-bearing strata. The high-sulfur lean coal with high coalification degree in the sea-phase coal structure in China, especially in the southern area, has rich resources and larger yield, and can fully use the high-sulfur lean coal and steadily improve the blending proportion in coking and blending coal, thereby saving high-quality coking coal resources and bringing remarkable social benefit and economic benefit.
However, the high-sulfur lean coal has the characteristic of high sulfur content (generally, the sulfur content is more than 1.8 percent), and the sulfur content of metallurgical coke is generally required to be less than 0.80 percent; meanwhile, the ash component of the high-sulfur lean coal has higher content of alkali metal and alkaline earth metal, namely, the dissolution loss capacity of coke is stronger, so that the thermal strength of the coke is reduced; the high-sulfur lean coal has low volatile matter, and for the blended coal, the low volatile matter easily causes difficult coke pushing in the coke smelting process, and even no production accident occurs; meanwhile, the caking index is lower, namely the caking property and coking property are poorer, and the mechanical strength and thermal state performance of metallurgical coke are greatly influenced. How to prepare high-sulfur lean coal in a high proportion meets the requirements of primary metallurgical coke production, provides a novel method for coking and blending coal, and is a technical problem faced by coking enterprises all the time.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a coal blending coking method for smelting primary metallurgical coke by high-sulfur lean coal.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention discloses a coal blending coking method for smelting primary metallurgical coke by high-sulfur lean coal, which comprises the following steps:
step 1, determining the quality technical requirements of high-quality metallurgical coke, wherein main technical quality indexes of the high-quality metallurgical coke include ash content, sulfur content, thermal reactivity, strength after thermal reaction, wear resistance, crushing strength and average coke granularity;
step 2, determining main technical parameters of metallurgical coke production, coke oven type, coke oven carbonization chamber height and Jiao Lujie coke time;
step 3, comprehensively and systematically analyzing technical performance parameters of the high-sulfur lean coal to be used, and analyzing occurrence forms and contents of sulfur in the high-sulfur lean coal;
step 4, analyzing performance indexes of single coal used in combination with coal;
analysis of performance indexes of blended coal using single coal includes ash, sulfur, volatile matter, caking index (G), maximum thickness of colloid (Y), post-reaction strength (CSR), ash component catalytic index (mbic), gizzard maximum fluidity (αmax), lithofacies standard deviation (SR), and oz expansion (b);
step 5, determining the basic coal blending proportion of each single coal according to the coal consumption requirement and the coke quality requirement, and determining the upper limit value of the use of the high-sulfur lean coking coal;
step 6, after the proportion is determined, starting to verify the proportion by a test coke oven, mainly developing quality and detection analysis on the coke, adjusting and optimizing a coal blending technical structure according to the coke quality, and determining the proportion;
step 7, carrying out industrial coke oven tests on the experimentally determined proportions, carrying out mass and detection analysis on smelted coke, adjusting and optimizing a coal blending technical structure according to the coke mass, and determining the final proportions;
and 8, solidifying the coal blending technical scheme which is successfully tested in a mode of an operation instruction book to form the operation instruction book.
Further, the coke oven types include top-loading coke ovens and stamp-charging coke ovens.
Further, the method also comprises the step of establishing a job database according to the job instruction book.
Compared with the prior art, the invention has the beneficial technical effects that:
the invention solves the technical problems that the high-sulfur thin coking coal is used in a large proportion in the coal blending and coking process, and the quality requirement of metallurgical coke can be ensured, and the high-sulfur thin coking coal is used in a large proportion in the metallurgical coke production by optimizing the technical structure of the coal blending and the measurement compatibility of coking coals with different properties, thereby expanding the coking coal source, reducing the coking and coal blending cost, generating considerable economic benefit, protecting the non-renewable high-quality coking coal resource, prolonging the service cycle of the coking coal in China, providing a thinking and guarantee for the energy safety in China, and generating profound social effect and good social benefit.
Detailed Description
In order that those skilled in the art will better understand the present invention, the present invention will be described in further detail with reference to specific embodiments.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention discloses a coal blending coking method for smelting high-quality metallurgical coke by using high-sulfur lean coal, which comprises the following steps of:
step 1, determining the quality technical requirements of high-quality metallurgical coke, wherein main technical quality indexes of the high-quality metallurgical coke include ash content, sulfur content, thermal reactivity, strength after thermal reaction, wear resistance, crushing strength, average coke granularity and the like;
step 2, determining main technical parameters of metallurgical coke production, coke oven types (top-loading coke oven, tamping coke oven), coke oven carbonization chamber height, jiao Lujie coke time and the like;
step 3, comprehensively and systematically analyzing technical performance parameters of the high-sulfur lean coal to be used, and analyzing occurrence forms and contents of sulfur in the high-sulfur lean coal;
step 4, analyzing performance indexes of single coal used in combination with coal;
analysis of performance index of blended coal using single coal includes ash, sulfur, volatile matter, caking index (G), maximum thickness of colloid (Y), strength after reaction (CSR), ash component catalytic index (MIC), gibbs maximum fluidity (. Alpha. max ) Lithology standard deviation (SR) and ozi expansion (b);
step 5, determining the basic coal blending proportion of each single coal according to the coal consumption requirement and the coke quality requirement, and determining the upper limit value of the use of the high-sulfur lean coking coal;
step 6, after the proportion is determined, starting to verify the proportion by a test coke oven, mainly developing quality and detection analysis on the coke, adjusting and optimizing a coal blending technical structure according to the coke quality, and determining the proportion;
step 7, carrying out industrial coke oven tests on the experimentally determined proportions, carrying out mass and detection analysis on smelted coke, adjusting and optimizing a coal blending technical structure according to the coke mass, and determining the final proportions;
and 8, solidifying the coal blending technical scheme which is successfully tested in a mode of an operation instruction book to form the operation instruction book.
And establishing a database according to the operation instruction book according to the requirement.
The invention solves the technical problems that the high-sulfur thin coking coal is used in a large proportion in the coal blending and coking process, and the quality requirement of metallurgical coke can be ensured, and the high-sulfur thin coking coal is used in a large proportion in the metallurgical coke production by optimizing the technical structure of the coal blending and the measurement compatibility of coking coals with different properties, thereby expanding the coking coal source, reducing the coking and coal blending cost, generating considerable economic benefit, protecting the non-renewable high-quality coking coal resource, prolonging the service cycle of the coking coal in China, providing a thinking and guarantee for the energy safety in China, and generating profound social effect and good social benefit.
In order to further explain the technology of the patent, a certain coking plant is used for reducing the coal blending cost, expanding the coking coal source, and on the basis of guaranteeing the metallurgical coke quality requirement, two high-sulfur lean clean coals in Shanxi areas, lean clean coals 2.5 and lean clean coals 2.8 are used for top loading coke ovens to smelt high-quality metallurgical coke.
1. Determination of Coke quality demand
The metallurgical coke quality is required to be shown in table 1 according to the production quality requirements of the metallurgical coke in the coking plant.
Table 1 metallurgical coke quality requirements
| Project name | Ad | St,d | Vdaf | M40 | M10 | CRI | CSR |
| Quality technical requirements | 12.90 | 0.85 | 1.5 | 88.0 | 5.5 | 23.5 | 67.5 |
The main technical parameters for determining the metallurgical coke production process are shown in table 2.
TABLE 2 main technical parameters of Metallurgical Coke production Process
| Main technical parameter nameWeighing scale | Main technical parameter control parameter |
| Coke oven type | JNX3-70-2 |
| Height of carbonization chamber | 7 m |
| Coking time | 24 hours 26 minutes |
| Furnace end control temperature | 1100℃ |
| Straight temperature control change interval | 7℃ |
| Side standard temperature of coke oven | 1235℃ |
| Standard temperature of coke side of coke oven | 1290℃ |
| Suction force | 200Pa |
2. Technical performance analysis of high-sulfur lean clean coal
Comprehensive technical index analysis was performed on lean clean coal 2.5 and lean clean coal 2.8, and the technical indexes are shown in tables 3 and 4.
TABLE 3 main technical index of lean clean coal
| Vdaf | Ad | St,d | G | Y | MCI | CSR | α max | SR | b | |
| Lean clean coal 2.5 | 16.98 | 8.13 | 2.46 | 62 | 13.5 | 2.54 | 50.7 | 50 | 0.075 | 20 |
| Lean clean coal 2.8 | 18.79 | 8.54 | 2.78 | 57 | 10.5 | 3.17 | 46.6 | 30 | 0.082 | Only shrink |
And analyzing the occurrence state of sulfur in the high-sulfur lean clean coal and the conversion rate of sulfur in the coke smelting process. The analysis of the occurrence state of sulfur in the high sulfur lean clean coal is shown in Table 4.
TABLE 4 analysis of occurrence status of sulfur in high sulfur lean clean coal
The Ji's fluidity analysis technical parameters of the high-sulfur lean clean coal are shown in Table 5.
TABLE 5 thin clean coal Gibbs flow analysis index
| Project name | Lean clean coal 2.5 | Lean clean coal 2.8 |
| Initial softening temperature °c | 460 | 472 |
| Maximum fluidity temperature DEG C | 492 | 488 |
| Curing temperature (DEG C) | 514 | 507 |
| Plastic range °c | 54 | 35 |
| Maximum fluidity dd/min | 16 | 3 |
3. Determination of coal blending technical scheme
According to the condition that coking coal is used in a certain coking plant, three technical schemes are designed, and fine metallurgical coke is smelted in a top-loading 7-meter coke oven by using lean clean coal 2.5 and lean clean coal 2.8, wherein the test schemes are shown in table 6.
Table 6 design of test protocol (%)
| Single coal | Scheme 1 | Scheme 2 | Scheme 3 |
| Malan | 12 | 12 | 12 |
| Zhonghai fat coal | 9 | 9 | 9 |
| Lean clean coal 2.5 | 4 | 6 | 4 |
| Lean clean coal 2.8 | 3 | 3 | 5 |
| Ancient Chinese lean coking coal | 6 | 6 | 6 |
| Mongolia coking coal | 40 | 39 | 39 |
| Usea 1/3 coking coal | 11 | 10 | 10 |
| Xinjiang gas coal | 10 | 10 | 10 |
| Mongolia gas coal | 5 | 5 | 5 |
4. Single coal performance index analysis
And detecting and analyzing the performance index of the single coal according to the quality requirement of metallurgical coke. The specific values are shown in Table 7.
TABLE 7 Performance index of single coal
5. Industrial analysis of coal blending scheme
The industrial analysis technical indexes of the technical scheme are shown in table 8.
Table 8 protocol industrial analysis
| Ad | Vdaf | St,d | G | Y | X | Ratio of living inertia | Active ingredient | |
| Scheme 1 | 9.88 | 27.52 | 0.95 | 80 | 20 | 48.5 | 1.54 | 61％ |
| Scheme 2 | 9.76 | 26.34 | 1.04 | 76 | 16 | 47.5 | 1.36 | 55％ |
| Scheme 3 | 9.77 | 26.28 | 1.07 | 73 | 13 | 47.5 | 1.12 | 51％ |
From the industrial analysis index, along with the improvement of the blending proportion of the lean clean coal, the blending proportion of Mongolia coking coal and Uhai 1/3 coking coal is properly reduced, the sulfur content of the blended coal is increased, meanwhile, the bonding index of the high-sulfur lean clean coal is lower than that of the coking coal and the 1/3 coking coal, the bonding index of the blended coal is reduced, the maximum thickness Y value of a colloid layer is reduced, and the active ingredients are reduced, so that the analysis and judgment are carried out, the blending proportion of the high-sulfur lean clean coal is not too high, and the quality and the cost are comprehensively considered on the premise of fully analyzing the component index of the blended coal and taking the required metallurgical coke quality as the basis, so that the high-sulfur lean clean coal is reasonably used.
6. Coke mechanical property and thermal state strength detection and analysis of coal blending scheme
After the proportion is determined, the test coke oven is started to verify the proportion, the test coke oven is used as a 40Kg load test coke oven, the technical parameters of the test coke oven are adjusted appropriately, the correlation coefficient of the industrial 7-meter coke oven is 1.05, the quality and detection analysis of the coke are mainly carried out, and the detection and analysis data of the mechanical property and the thermal state strength of the metallurgical coke are shown in Table 9.
TABLE 9 Metallurgical Coke mechanical Properties and thermal Strength detection data for different protocols
From the technical index analysis in the table above, the technical scheme 1 meets the predetermined coke quality requirement, and the main performance indexes of the scheme 2 and the scheme 3 cannot meet the predetermined coke quality requirement. After gradually increasing the sulfur-lean coking coal, the mechanical strength is deteriorated, and the obvious trend change is shown.
After the sulfur-lean coking coal is gradually increased from the analysis of the thermal strength of the metallurgical coke, the thermal strength of the metallurgical coke is gradually reduced, and the trend change is shown. Proved that the addition ratio of the high-sulfur lean coking coal should not be controlled to be too large in a proper range, otherwise, the main performance index of the coking coal is greatly affected.
7. Industrial test verification
According to the test process and analysis of the test data, the coal blending process is comprehensively considered, and the scheme 1 is selected as an industrial test scheme.
And carrying out industrial coke oven tests on the well-determined proportions of the tests, and carrying out quality and detection analysis on the smelted coke. In a certain coking plant, the scheme 1 is adopted as an industrial technical scheme, a certain carbonization chamber is used for matching coal according to the scheme 1 in a 7-meter top-loading coke oven, industrial tests are carried out according to coke oven production control parameters, detection analysis is carried out on metallurgical coke, and quality index detection data are shown in table 10.
Table 10 scheme 1 industrial test metallurgical coke quality detection index
| Project name | Ad | St,d | M40 | M10 | CRI | CSR |
| Industrial test | 12.83 | 0.85 | 90.7 | 5.0 | 21.9 | 69.5 |
From the table, the industrial test metallurgical coke quality index detection and analysis data completely meet the quality control index requirements, optimize the coal blending technical structure according to the coke quality and cost, and determine the final proportion.
The experimental scheme is used in industrial production, and quality detection is carried out on metallurgical coke produced continuously, and specific numerical values are shown in Table 11.
TABLE 11 Metallurgical Coke detection index for Industrial production
| Project name | Ad | St,d | M40 | M10 | CRI | CSR |
| First batch | 12.83 | 0.85 | 90.7 | 5.0 | 21.9 | 69.5 |
| Second batch | 12.87 | 0.86 | 89.5 | 5.4 | 22.3 | 69.1 |
| Third batch | 12.85 | 0.85 | 90.5 | 5.5 | 22.7 | 68.5 |
| Fourth batch | 12.84 | 0.83 | 91.2 | 4.8 | 21.9 | 69.8 |
| Fifth batch | 12.83 | 0.86 | 90.5 | 5.0 | 21.8 | 69.0 |
From the detection analysis of five batches of metallurgical coke produced continuously and industrially, the technical scheme fully meets the control quality requirement of the metallurgical coke, the proportion of the high-sulfur lean clean coal reaches 7%, the low-sulfur high-strength coking coal with higher price is not used, and the coal blending cost is obviously reduced.
The coal blending technical scheme is solidified in a mode of an operation instruction book to form the operation instruction book.
The above embodiments are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.
Claims (4)
1. A coal blending coking method for smelting primary metallurgical coke by high-sulfur lean coal is characterized by comprising the following steps of: the method comprises the following steps:
step 1, determining the quality technical requirements of high-quality metallurgical coke, wherein main technical quality indexes of the high-quality metallurgical coke include ash content, sulfur content, thermal reactivity, strength after thermal reaction, wear resistance, crushing strength and average coke granularity;
step 2, determining main technical parameters of metallurgical coke production, coke oven type, coke oven carbonization chamber height and Jiao Lujie coke time;
step 3, comprehensively and systematically analyzing technical performance parameters of the high-sulfur lean coal to be used, and analyzing occurrence forms and contents of sulfur in the high-sulfur lean coal;
step 4, analyzing performance indexes of single coal used in combination with coal;
analysis of performance indexes of blended coal using single coal includes ash, sulfur, volatile matter, caking index (G), maximum thickness of colloid (Y), post-reaction strength (CSR), ash composition catalytic index (MIC), gizzard maximum fluidity (αmax), rock phase standard deviation (SR), and oz swelling degree (b);
step 5, determining the basic coal blending proportion of each single coal according to the coal consumption requirement and the coke quality requirement, and determining the upper limit value of the use of the high-sulfur lean coking coal;
step 6, after the proportion is determined, starting to verify the proportion by a test coke oven, mainly developing quality and detection analysis on the coke, adjusting and optimizing a coal blending technical structure according to the coke quality, and determining the proportion;
step 7, carrying out industrial coke oven tests on the well-determined proportions, carrying out mass and detection analysis on smelted coke, adjusting and optimizing a coal blending technical structure according to the coke mass, and determining the final proportions;
and 8, solidifying the coal blending technical scheme which is tested successfully in a mode of an operation instruction book to form the operation instruction book.
2. The coal blending coking method for smelting primary metallurgical coke from high-sulfur lean coal according to claim 1, which is characterized by comprising the following steps: analyzing the occurrence form and the content of sulfur in the high-sulfur lean clean coal.
3. The coal blending coking method for smelting primary metallurgical coke from high-sulfur lean coal according to claim 1, which is characterized by comprising the following steps: the coke oven types include top-loading coke ovens and stamp-charging coke ovens.
4. The coal blending coking method for smelting primary metallurgical coke from high-sulfur lean coal according to claim 1, which is characterized by comprising the following steps: and establishing a job database according to the job instruction book.
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