CN114182089B - Sintering method of semi-coke raw material - Google Patents
Sintering method of semi-coke raw material Download PDFInfo
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- CN114182089B CN114182089B CN202111418445.8A CN202111418445A CN114182089B CN 114182089 B CN114182089 B CN 114182089B CN 202111418445 A CN202111418445 A CN 202111418445A CN 114182089 B CN114182089 B CN 114182089B
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- 238000005245 sintering Methods 0.000 title claims abstract description 58
- 239000000571 coke Substances 0.000 title claims abstract description 30
- 239000002994 raw material Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000012535 impurity Substances 0.000 claims abstract description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 12
- 238000012216 screening Methods 0.000 claims abstract description 12
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 6
- 241001062472 Stokellia anisodon Species 0.000 claims abstract description 6
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 229910052742 iron Inorganic materials 0.000 claims abstract description 6
- 239000004571 lime Substances 0.000 claims abstract description 6
- 238000009766 low-temperature sintering Methods 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 239000000843 powder Substances 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000000126 substance Substances 0.000 claims description 13
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 239000003245 coal Substances 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 239000010959 steel Substances 0.000 abstract description 3
- 238000003723 Smelting Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 229910052717 sulfur Inorganic materials 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000012265 solid product Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/007—Conditions of the cokes or characterised by the cokes used
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a sintering method of semi-coke raw materials, which relates to the technical field of steel production, S1, mixing and crushing return ores, lime powder and semi-coke according to the proportion of 3:2:5, wherein the crushing granularity is less than or equal to 5mm, mixing water content is 7.0+/-0.5, and preheating the mixed raw materials by adopting steam; s2, conveying the preheated mixture to a trolley plate for sintering at the temperature of 1000+/-100 ℃ for 5-15 minutes, wherein the sintering thickness is 15-50mm; s3, reducing sintering temperature after high-temperature sintering, wherein the sintering end temperature is 480-550 ℃, the sintering time is 5-20 minutes, performing air cooling after low-temperature sintering, controlling the temperature to 50-150 ℃, and performing ore unloading operation; s4, adopting bar vibration screening, wherein the screening aperture is 5mm, 10mm and 15mm; s5, conveying the sieved sinter to a blast furnace through a belt to smelt molten iron. The blue coal has better sintering effect, and the sintered ore material is uniform and has less impurities, thereby being more beneficial to blast furnace smelting.
Description
Technical Field
The invention relates to the technical field of steel production, in particular to a sintering method of semi-coke raw materials.
Background
Along with the sustainable development of the economy in China, the demand for energy sources is more and more serious, the use amount of coal is more and more limited, and low-price products are adopted for substitution, so that the method is more and more important for the development of enterprises. The semi-coke is a low-temperature carbonization step-conversion solid product in low-metamorphic coal, is widely regarded as a clean energy source in the world, has the characteristics of high fixed carbon, high chemical activity, low ash content, low phosphorus and sulfur, is superior to coal in price and environmental protection, is inferior to coal in moisture and wear resistance, improves the usage amount of the semi-coke by changing the defects of the semi-coke, and is widely applied to enterprise production to achieve the purposes of replacing raw materials and improving environment. Therefore, the steel plant needs to deeply discover the availability of the semi-coke according to the self situation, and effectively replaces the using amount of coal.
Disclosure of Invention
Aiming at the technical problems and overcoming the defects of the prior art, the invention provides a sintering method of semi-coke raw materials, which comprises the following steps:
S1, mixing and crushing return ores, lime powder and semi-coke according to the proportion of 3:2:5, wherein the crushing granularity is less than or equal to 5mm, mixing water content is 7.0+/-0.5, and preheating the mixed raw materials by adopting steam;
S2, conveying the preheated mixture to a trolley plate for sintering at the temperature of 1000+/-100 ℃ for 5-15 minutes, wherein the sintering thickness is 15-50mm;
S3, reducing sintering temperature after high-temperature sintering, wherein the sintering end temperature is 480-550 ℃, the sintering time is 5-20 minutes, performing air cooling after low-temperature sintering, controlling the temperature to 50-150 ℃, and performing ore unloading operation;
s4, screening by using a bar vibrating screen, wherein the screening aperture is 5mm, 10mm and 15mm;
s5, conveying the sieved sinter to a blast furnace through a belt to smelt molten iron.
The technical scheme of the invention is as follows:
The sintering method of the semi coke raw material comprises the following chemical components in percentage by mass: c:70.0 to 80.0 percent, H:2.0 to 3.0 percent, O:1.0 to 5.0 percent, N:1.0 to 2.0 percent, S:0.50% -1.00%, and the balance of unavoidable impurities.
The sintering method of the semi coke raw material comprises the following chemical components in percentage by mass: c:70.0 to 75.0 percent, H:2.0 to 2.5 percent, O:1.0 to 3.0 percent, N:1.0 to 1.5 percent, S:0.50 to 0.8 percent, and the balance of unavoidable impurities.
The sintering method of the semi coke raw material comprises the following chemical components in percentage by mass: c:75.0 to 80.0 percent, H:2.5 to 3.0 percent, O:3.0 to 5.0 percent, N:1.5 to 2.0 percent, S:0.70% -1.00%, and the balance of unavoidable impurities.
The sintering method of the semi coke raw material comprises the following chemical components in percentage by mass: c:72.0 to 78.0 percent, H:2.2 to 2.8 percent, O:2.0 to 4.0 percent, N:1.2 to 1.8 percent, S:0.60% -0.8% and the balance unavoidable impurities.
The beneficial effects of the invention are as follows:
(1) The semi-coke has the characteristics of high fixed carbon, high chemical activity, low ash content, low phosphorus and sulfur, is superior to coal in price and environmental protection, reduces the dependence of energy-consuming enterprises on the coal, reduces the carbon emission and improves the environmental quality;
(2) The invention adopts reasonable proportion with the ore and the limestone, solves the problems of high moisture and wear resistance of the semi-coke;
(3) According to the invention, by setting the sintering temperature and time, the sintering effect of the blue coal is better, the sintered ore material is uniform, the impurities are less, and the method is more beneficial to blast furnace smelting.
Detailed Description
Example 1
The sintering method of the semi-coke raw material provided by the embodiment comprises the following chemical components in percentage by mass: c:71%, H:2.2%, O:1.3%, N:1.1%, S:0.55%, the balance unavoidable impurities.
The manufacturing method comprises the following steps:
S1, mixing and crushing return ores, lime powder and semi-coke according to the proportion of 3:2:5, wherein the crushing granularity is 3mm, mixing water content is 7.1, and preheating the mixed raw materials by adopting steam;
S2, conveying the preheated mixture to a trolley plate for sintering at 1080 ℃ for 8 minutes, wherein the sintering thickness is 35mm;
S3, reducing the sintering temperature after high-temperature sintering, wherein the sintering end temperature is 510 ℃, the sintering time is 15 minutes, performing air cooling after low-temperature sintering, controlling the temperature to 70 ℃, and performing ore unloading operation.
S4, screening by using a bar vibrating screen, wherein the screening aperture is 5mm, 10mm and 15mm;
s5, conveying the sieved sinter to a blast furnace through a belt to smelt molten iron
Example 2
The sintering method of the semi-coke raw material provided by the embodiment comprises the following chemical components in percentage by mass: c:79%, H:2.9%, O:4.7%, N:1.9%, S:0.96%, the balance unavoidable impurities.
The manufacturing method comprises the following steps:
S1, mixing and crushing return ores, lime powder and semi-coke according to the proportion of 3:2:5, wherein the crushing granularity is 2mm, mixing water content is 6.9, and preheating the mixed raw materials by adopting steam;
S2, conveying the preheated mixture to a trolley plate for sintering at the sintering temperature of 996 ℃ for 9 minutes, wherein the sintering thickness is 33mm;
S3, reducing the sintering temperature after high-temperature sintering, wherein the sintering end temperature is 496 ℃, the sintering time is 13 minutes, performing air cooling after low-temperature sintering, controlling the temperature to 90 ℃, and performing ore unloading operation.
S4, screening by using a bar vibrating screen, wherein the screening aperture is 5mm, 10mm and 15mm;
s5, conveying the sieved sinter to a blast furnace through a belt to smelt molten iron
Example 3
The sintering method of the semi-coke raw material provided by the embodiment comprises the following chemical components in percentage by mass: c:76%, H:2.6%, O:3%, N:1.6%, S:0.69%, the balance unavoidable impurities.
The manufacturing method comprises the following steps:
S1, mixing and crushing return ores, lime powder and semi-coke according to the proportion of 3:2:5, wherein the crushing granularity is 4mm, mixing water content is 7.3, and preheating the mixed raw materials by adopting steam;
S2, conveying the preheated mixture to a trolley plate for sintering at 1088 ℃ for 11 minutes, wherein the sintering thickness is 40mm;
S3, reducing the sintering temperature after high-temperature sintering, wherein the sintering end temperature is 496 ℃, the sintering time is 19 minutes, performing air cooling after low-temperature sintering, controlling the temperature to 133 ℃, and performing ore unloading operation.
S4, screening by using a bar vibrating screen, wherein the screening aperture is 5mm, 10mm and 15mm;
s5, conveying the sieved sinter to a blast furnace through a belt to smelt molten iron
In conclusion, the invention has remarkable use effect of replacing coal by the semi-coke, effectively improves the environmental protection of blast furnace enterprises, reduces the utilization rate of petrochemical raw materials, meets the requirement of blast furnace sintering, and improves the benefit of the enterprises.
In addition to the embodiments described above, other embodiments of the invention are possible. All technical schemes formed by equivalent substitution or equivalent transformation fall within the protection scope of the invention.
Claims (5)
1. A sintering method of semi-coke raw material is characterized in that: the method comprises the following steps:
S1, mixing and crushing return ores, lime powder and semi-coke according to the proportion of 3:2:5, wherein the crushing granularity is less than or equal to 5mm, mixing water content is 7.0+/-0.5, and preheating the mixed raw materials by adopting steam;
S2, conveying the preheated mixture to a trolley plate for sintering at the temperature of 1000+/-100 ℃ for 5-15 minutes, wherein the sintering thickness is 15-50mm;
S3, reducing sintering temperature after high-temperature sintering, wherein the sintering end temperature is 480-550 ℃, the sintering time is 5-20 minutes, performing air cooling after low-temperature sintering, controlling the temperature to 50-150 ℃, and performing ore unloading operation;
s4, screening by using a bar vibrating screen, wherein the screening aperture is 5mm, 10mm and 15mm;
s5, conveying the sieved sinter to a blast furnace through a belt to smelt molten iron.
2. The method for sintering semi-coke raw material according to claim 1, wherein: the blue-carbon chemical components and mass percentages are as follows: c:70.0 to 80.0 percent, H:2.0 to 3.0 percent, O:1.0 to 5.0 percent, N:1.0 to 2.0 percent, S:0.50% -1.00%, and the balance of unavoidable impurities.
3. The method for sintering semi-coke raw material according to claim 2, characterized in that: the blue-carbon chemical components and mass percentages are as follows: c:70.0 to 75.0 percent, H:2.0 to 2.5 percent, O:1.0 to 3.0 percent, N:1.0 to 1.5 percent, S:0.50 to 0.8 percent, and the balance of unavoidable impurities.
4. The method for sintering semi-coke raw material according to claim 2, characterized in that: the blue-carbon chemical components and mass percentages are as follows: c:75.0 to 80.0 percent, H:2.5 to 3.0 percent, O:3.0 to 5.0 percent, N:1.5 to 2.0 percent, S:0.70% -1.00%, and the balance of unavoidable impurities.
5. The method for sintering semi-coke raw material according to claim 1, wherein: the blue-carbon chemical components and mass percentages are as follows: c:72.0 to 78.0 percent, H:2.2 to 2.8 percent, O:2.0 to 4.0 percent, N:1.2 to 1.8 percent, S:0.60% -0.8% and the balance unavoidable impurities.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111418445.8A CN114182089B (en) | 2021-11-26 | 2021-11-26 | Sintering method of semi-coke raw material |
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| CN202111418445.8A CN114182089B (en) | 2021-11-26 | 2021-11-26 | Sintering method of semi-coke raw material |
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| CN114182089A CN114182089A (en) | 2022-03-15 |
| CN114182089B true CN114182089B (en) | 2024-04-16 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009242829A (en) * | 2008-03-28 | 2009-10-22 | Jfe Steel Corp | Method for producing sintered ore |
| CN103215443A (en) * | 2013-05-21 | 2013-07-24 | 唐山瑞丰钢铁（集团）有限公司 | High-ore-matching-ratio brown iron ore sintering technology |
| CN103667686A (en) * | 2013-12-31 | 2014-03-26 | 四川德胜集团钒钛有限公司 | Sintering mixture and application thereof |
| CN103789478A (en) * | 2014-01-28 | 2014-05-14 | 酒泉钢铁(集团)有限责任公司 | Method for producing metallized iron powder through carrying out carbon cycle oxygen increasing and direct reduction on massive iron ores |
| CN105039684A (en) * | 2015-08-04 | 2015-11-11 | 北京科技大学 | Method for using powdery semicoke as sintering fuel |
| CN105112663A (en) * | 2015-08-24 | 2015-12-02 | 中冶东方工程技术有限公司 | Combined production process for high-carbon ferro-chrome and semi-coke |
-
2021
- 2021-11-26 CN CN202111418445.8A patent/CN114182089B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009242829A (en) * | 2008-03-28 | 2009-10-22 | Jfe Steel Corp | Method for producing sintered ore |
| CN103215443A (en) * | 2013-05-21 | 2013-07-24 | 唐山瑞丰钢铁（集团）有限公司 | High-ore-matching-ratio brown iron ore sintering technology |
| CN103667686A (en) * | 2013-12-31 | 2014-03-26 | 四川德胜集团钒钛有限公司 | Sintering mixture and application thereof |
| CN103789478A (en) * | 2014-01-28 | 2014-05-14 | 酒泉钢铁(集团)有限责任公司 | Method for producing metallized iron powder through carrying out carbon cycle oxygen increasing and direct reduction on massive iron ores |
| CN105039684A (en) * | 2015-08-04 | 2015-11-11 | 北京科技大学 | Method for using powdery semicoke as sintering fuel |
| CN105112663A (en) * | 2015-08-24 | 2015-12-02 | 中冶东方工程技术有限公司 | Combined production process for high-carbon ferro-chrome and semi-coke |
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| CN114182089A (en) | 2022-03-15 |
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