CN113549758A - Sintered ore containing waste activated carbon and preparation method thereof - Google Patents
Sintered ore containing waste activated carbon and preparation method thereof Download PDFInfo
- Publication number
- CN113549758A CN113549758A CN202110669284.3A CN202110669284A CN113549758A CN 113549758 A CN113549758 A CN 113549758A CN 202110669284 A CN202110669284 A CN 202110669284A CN 113549758 A CN113549758 A CN 113549758A
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- CN
- China
- Prior art keywords
- activated carbon
- mixing
- waste activated
- anthracite
- sintering
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 83
- 239000002699 waste material Substances 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 238000005245 sintering Methods 0.000 claims abstract description 28
- 239000000446 fuel Substances 0.000 claims abstract description 24
- 238000002156 mixing Methods 0.000 claims abstract description 24
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000003830 anthracite Substances 0.000 claims abstract description 20
- 239000002245 particle Substances 0.000 claims abstract description 18
- 239000000203 mixture Substances 0.000 claims abstract description 16
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 14
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000003546 flue gas Substances 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 235000019738 Limestone Nutrition 0.000 claims abstract description 7
- 239000000292 calcium oxide Substances 0.000 claims abstract description 7
- 235000012255 calcium oxide Nutrition 0.000 claims abstract description 7
- 239000010459 dolomite Substances 0.000 claims abstract description 7
- 229910000514 dolomite Inorganic materials 0.000 claims abstract description 7
- 239000006028 limestone Substances 0.000 claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 9
- 239000003245 coal Substances 0.000 claims description 8
- 238000009826 distribution Methods 0.000 claims description 3
- 239000000571 coke Substances 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 8
- 229910052500 inorganic mineral Inorganic materials 0.000 description 5
- 239000011707 mineral Substances 0.000 description 5
- 235000010755 mineral Nutrition 0.000 description 5
- 238000001179 sorption measurement Methods 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000010304 firing Methods 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000011812 mixed powder Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000004449 solid propellant Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- WETINTNJFLGREW-UHFFFAOYSA-N calcium;iron;tetrahydrate Chemical compound O.O.O.O.[Ca].[Fe].[Fe] WETINTNJFLGREW-UHFFFAOYSA-N 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000013332 literature search Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000012360 testing method Methods 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
- C22B1/24—Binding; Briquetting ; Granulating
-
- 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
Abstract
A sintering and mixing material containing waste activated carbon comprises the following raw materials in percentage by weight: mixing ores uniformly: 50-54%, limestone: 5-7%, dolomite: 5-6%, quicklime: 1.5-2.5%, anthracite: 3-3.3%, waste activated carbon: 1.0-1.6%, return mine: 29-32%; in addition, water is added according to 6.0-6.5 percent of the total weight of the raw materials. The preparation method comprises the following steps: stirring and uniformly mixing anthracite with the particle size of less than or equal to 0.5mm and waste activated carbon; mixing anthracite with the granularity of more than 0.5mm and the uniformly mixed material into a comprehensive fuel; mixing the comprehensive fuel with the uniformly mixed ore, limestone, dolomite, quicklime and return ores according to the adding percentage to form a mixture, adding water into the mixture, and granulating; sintering the materials to prepare sintered ore; detecting and analyzing; outlet flue gas is monitored. By adding part of the waste activated carbon, the invention not only makes full use of the characteristics of the waste activated carbon to replace part of coke, but also ensures that the sintering rate of the sinter meets the production requirement.
Description
Technical Field
The invention relates to a sintered ore and a preparation method thereof, in particular to a sintered ore containing waste activated carbon and a preparation method thereof.
Background
In the future, the steel industry needs to comprehensively implement ultra-low pollutant emission, the emission standard of flue gas pollutants is further improved, and the emission reduction pressure of the steel industry is continuously increased. In order to meet the new environmental protection requirement, the desulfurization and denitrification device for the sintering machine flue gas adopts an activated carbon flue gas purification device in an adsorption tower to purify the flue gas, and because the activated carbon is porous, large in surface area and strong in adsorption capacity, harmful substances such as sulfur dioxide, nitrogen oxides, dioxin and the like in the sintering machine head flue gas can be comprehensively removed, the corrosion of the discharged harmful substances to the surrounding environment is thoroughly avoided, and the emission amount of particulate matters can be greatly reduced. The active carbon in the active carbon flue gas purification device is added into the adsorption tower from the top of the tower and moves downwards under the action of gravity and a discharging device at the bottom of the tower, and small particles of waste active carbon powder can fall off in the moving process.
In the moving process of the activated carbon in the adsorption tower, the dropped small-particle activated carbon powder is conveyed into the powder bin, and is transported to a blast furnace system by using an attraction type tank car to be used as fuel to replace part of coke and provide part of C source for the carburization of the cast iron, but the combustion value and combustible carbon of the waste activated carbon powder are lower than those of the pulverized coal, so that the requirement of the blast furnace on the fuel is difficult to achieve. In order to increase the recovery rate of the waste activated carbon powder, attempts have been made to use the waste activated carbon powder for sintering, but there is a problem that the sintering rate of the sintered ore is low.
The collected activated carbon powder is subjected to physical, chemical and industrial analysis, a sintering cup experiment is developed, the activated carbon is used as a fuel for sintering and ore blending, and the adding proportion of the activated carbon powder is discussed on the premise of meeting the requirements of sintered ore products, quality and environmental-friendly emission, so that the solid fuel consumption in the sintering process can be effectively reduced.
Through literature search, the following results are found:
the document with Chinese patent application No. CN201810664410.4 discloses a processing method for applying waste desulfurizer to sintering, which comprises the following steps: crushing the waste desulfurizer into particles with the particle size of 100 percent less than 8mm and 10 percent less than 1 mm; uniformly mixing the crushed waste desulfurizer with iron ore powder to obtain mixed powder; adding water into the sintered and uniformly mixed powder, mixing and granulating to obtain a granulating material; the granulated material is sintered to obtain sintered ore, so that the waste desulfurizer is subjected to harmless treatment, and the resource utilization of the waste desulfurizer is realized. Although the literature can effectively improve the recycling of the waste desulfurizer, the desulfurizer has coarse particles compared with activated carbon powder, and can be used for sintering after being crushed.
Disclosure of Invention
The invention aims at the defects of porosity, large surface area and strong adsorption capacity of the active carbon, and provides the sintered ore containing the waste active carbon and the preparation method, which can solve the problem of comprehensive utilization of the waste active carbon, fully utilize the characteristics of the waste active carbon to replace part of coke, and ensure that the sintering rate of the sintered ore can meet the requirement of production.
The measures for realizing the aim are as follows:
a sintering and mixing material containing waste activated carbon comprises the following raw materials in percentage by weight: mixing ores uniformly: 50-54%, limestone: 5-7%, dolomite: 5-6%, quicklime: 1.5-2.5%, anthracite: 3-3.3%, waste activated carbon: 1.0-1.6%, return mine: 29-32%; in addition, water is added according to 6.0-6.5 percent of the total weight of the raw materials.
It is characterized in that: the anthracite coal has a particle size of less than or equal to 0.5mm accounting for 10-15% of the anthracite coal, and the rest is the anthracite coal with a particle size of more than 0.5 mm.
It is characterized in that: in the waste active carbon, the proportion of the granularity less than or equal to 0.5mm is not more than 75 percent, and the rest is the granularity more than 0.5 mm.
A method for preparing a sintered blend containing spent activated carbon comprising the steps of:
1) stirring and uniformly mixing anthracite with the particle size of less than or equal to 0.5mm and waste activated carbon;
2) anthracite with the granularity of more than 0.5mm is uniformly mixed with the uniformly mixed material obtained in the step 1) to obtain a comprehensive fuel; controlling the proportion of the particle size of less than or equal to 0.5mm in the comprehensive fuel not to exceed 30 percent;
3) mixing the comprehensive fuel with the mixed ore according to the following adding percentage: 50-54%, limestone: 5-7%, dolomite: 5-6%, quicklime: 1.5-2.5% and return fines: mixing 29-32% of the mixture into a mixture, adding water into the mixture, uniformly mixing and granulating; sintering according to conventional distribution to obtain sintered ore;
4) detecting and analyzing the quality of the produced sinter;
5) the outlet flue gas is monitored using a flue gas analyzer.
It is characterized in that: the alkalinity of the sintered ore prepared by sintering is 1.9-2.0.
The waste activated carbon is added in the amount of 1.0-1.6% in the invention, because the economic value is not obvious when the content of the added activated carbon powder is less than 1.0%, when the content of the added activated carbon powder is more than 1.6%, the granularity of the comprehensive fuel is fine, and the quality of the produced sintered mineral product can not meet the production requirement.
The addition of 3.0-3.3% of anthracite is limited because the fuel consumption is controlled in a reasonable range, the fuel consumption is too high, the oxygen potential of a material layer is low, the generation of needle-shaped calcium ferrite is not facilitated, and the FeO of sintered ore is high and the reducibility is reduced. If the fuel consumption is too low, the heat will be insufficient and the quality of the sintered mineral will be reduced.
The invention controls the grain size of anthracite coal to be less than or equal to 0.5mm to account for 10-15% because the grain size of the fuel to be added is controlled, the grain size of the fuel is too fine, the combustion speed is too fast, the high-temperature retention time is short, and the quality of sintered mineral products is reduced.
The invention controls the proportion of the grain size less than or equal to 0.5mm in the comprehensive fuel not to exceed 30 percent because the grain size of the fuel to be added is controlled, the grain size of the fuel is too fine, the combustion speed is too fast, the high-temperature retention time is short, and the quality of sintered mineral products is reduced.
Compared with the prior art, the method has the advantages that the characteristics of the waste activated carbon are fully utilized by adding part of the waste activated carbon to replace part of coke, and the sintering rate of the sinter can meet the production requirement.
Detailed Description
The present invention is described in detail below:
table 1 is a list of values of the raw materials of each example and comparative example of the present invention;
table 2 is a table of experimental results of sintered ore according to each example and comparative example of the present invention;
table 3 is a table showing the experimental results of sintered ore of each example of the present invention and comparative example.
The smelting is carried out according to the following steps in each embodiment of the invention:
1) stirring and uniformly mixing anthracite with the particle size of less than or equal to 0.5mm and waste activated carbon;
2) anthracite with the granularity of more than 0.5mm is uniformly mixed with the uniformly mixed material obtained in the step 1) to obtain a comprehensive fuel; controlling the proportion of the particle size of less than or equal to 0.5mm in the comprehensive fuel not to exceed 30 percent;
3) mixing the comprehensive fuel with the mixed ore according to the following adding percentage: 50-54%, limestone: 5-7%, dolomite: 5-6%, quicklime: 1.5-2.5% and return fines: mixing 29-32% of the mixture into a mixture, adding water into the mixture, uniformly mixing and granulating; sintering according to conventional distribution to obtain sintered ore;
4) detecting and analyzing the quality of the produced sinter;
5) the outlet flue gas is monitored using a flue gas analyzer.
TABLE 1 tabulated values (wt%) of the materials of the examples of the invention and comparative examples
TABLE 2 sinter experimental results of examples of the present invention and comparative examples
TABLE 3 tabulated (wt%) results of chemical composition analysis of sintered ore of examples of the present invention and comparative examples
As can be seen from tables 1 to 3, the quality of the sintered ore produced in the embodiments 1 to 6 can meet the production requirement, and the flue gas generated in the sintering process can reach the existing emission standard. In example 6, the sintering rate was high, the firing rate and the yield were both reduced, the equilibrium coefficient reflected by the reduction in the sintering rate was barely satisfactory for the purpose of the test, but the drum strength of the obtained sintered ore was significantly reduced. Comparative example 1, in which no activated carbon powder was added, had relatively high firing rate and yield, high drum strength, and reduced reducibility. The active carbon powder in the comparative example 2 has the compounding ratio up to 1.8%, the firing rate and the yield are obviously reduced, the balance coefficient is more than 1.1, the fuel granularity is too fine, the combustion speed is too fast, the high-temperature retention time is short, and the quality of the produced sintered mineral product can not reach the standard.
According to the invention, the sintering production application of the recovered activated carbon in the desulfurization and denitrification processes is carried out, the adding proportion of the activated carbon powder is agreed, the activated carbon powder and the fine particles with the particle size less than or equal to 0.5mm in the anthracite are premixed and uniformly processed, and the activated carbon powder is used as a sintering raw material to be sintered, uniformly mixed and granulated under the condition that the supply of the activated carbon is stable, so that the solid fuel consumption in the sintering process can be effectively reduced, and the sintering cost is effectively reduced.
The embodiments of the present invention are merely preferred examples, and the technical solution is not limited to the embodiments.
Claims (5)
1. A sintering and mixing material containing waste activated carbon comprises the following raw materials in percentage by weight: mixing ores uniformly: 50-54%, limestone: 5-7%, dolomite: 5-6%, quicklime: 1.5-2.5%, anthracite: 3-3.3%, waste activated carbon: 1.0-1.6%, return mine: 29-32%; in addition, water is added according to 6.0-6.2 percent of the total weight of the raw materials.
2. A sintered blend containing spent activated carbon as claimed in claim 1 wherein: the anthracite coal has a particle size of less than or equal to 0.5mm accounting for 10-15% of the anthracite coal, and the rest is the anthracite coal with a particle size of more than 0.5 mm.
3. A sintered blend containing spent activated carbon as claimed in claim 1 wherein: the ratio of the particle size of the waste activated carbon which is less than or equal to 0.5mm is not more than 15 percent, and the rest is the particle size of more than 0.5 mm.
4. A method for preparing a sintered blend containing spent activated carbon as claimed in claim 1, comprising the steps of:
1) stirring and uniformly mixing anthracite with the particle size of less than or equal to 0.5mm and waste activated carbon;
2) anthracite with the granularity of more than 0.5mm is uniformly mixed with the uniformly mixed material obtained in the step 1) to obtain a comprehensive fuel; controlling the proportion of the particle size of less than or equal to 0.5mm in the comprehensive fuel not to exceed 30 percent;
3) mixing the comprehensive fuel with the mixed ore according to the following adding percentage: 50-54%, limestone: 5-7%, dolomite: 5-6%, quicklime: 1.5-2.5% and return fines: mixing 29-32% of the mixture into a mixture, adding water into the mixture, uniformly mixing and granulating; sintering according to conventional distribution to obtain sintered ore;
4) detecting and analyzing the quality of the produced sinter;
5) the outlet flue gas is monitored using a flue gas analyzer.
5. The method for producing a sintered kneaded material containing waste activated carbon as claimed in claim 4, wherein: the alkalinity of the sintered ore prepared by sintering is 1.9-2.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110669284.3A CN113549758A (en) | 2021-06-17 | 2021-06-17 | Sintered ore containing waste activated carbon and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110669284.3A CN113549758A (en) | 2021-06-17 | 2021-06-17 | Sintered ore containing waste activated carbon and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113549758A true CN113549758A (en) | 2021-10-26 |
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ID=78130676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110669284.3A Pending CN113549758A (en) | 2021-06-17 | 2021-06-17 | Sintered ore containing waste activated carbon and preparation method thereof |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115305300A (en) * | 2022-08-30 | 2022-11-08 | 武汉钢铁有限公司 | Mixed fuel for sintering ingredients during switching period of full coke and full coal |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111471852A (en) * | 2020-06-16 | 2020-07-31 | 武汉钢铁有限公司 | Method for sintering waste activated carbon powder, sintering mixture and sintered ore |
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2021
- 2021-06-17 CN CN202110669284.3A patent/CN113549758A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111471852A (en) * | 2020-06-16 | 2020-07-31 | 武汉钢铁有限公司 | Method for sintering waste activated carbon powder, sintering mixture and sintered ore |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115305300A (en) * | 2022-08-30 | 2022-11-08 | 武汉钢铁有限公司 | Mixed fuel for sintering ingredients during switching period of full coke and full coal |
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Application publication date: 20211026 |