CN113584303A - Production ingredient capable of improving quality of finished pellets and preparation process thereof - Google Patents
Production ingredient capable of improving quality of finished pellets and preparation process thereof Download PDFInfo
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- CN113584303A CN113584303A CN202110902179.XA CN202110902179A CN113584303A CN 113584303 A CN113584303 A CN 113584303A CN 202110902179 A CN202110902179 A CN 202110902179A CN 113584303 A CN113584303 A CN 113584303A
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- Prior art keywords
- percent
- magnetite
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 51
- 239000008188 pellet Substances 0.000 title claims abstract description 48
- 239000004615 ingredient Substances 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims abstract description 52
- 238000002156 mixing Methods 0.000 claims abstract description 34
- 239000000463 material Substances 0.000 claims abstract description 31
- 229910052595 hematite Inorganic materials 0.000 claims abstract description 30
- 239000011019 hematite Substances 0.000 claims abstract description 30
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 27
- 239000000440 bentonite Substances 0.000 claims abstract description 27
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000002956 ash Substances 0.000 claims abstract description 21
- 238000005303 weighing Methods 0.000 claims abstract description 19
- 239000010881 fly ash Substances 0.000 claims abstract description 15
- 238000005453 pelletization Methods 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 239000002994 raw material Substances 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 238000001354 calcination Methods 0.000 abstract description 9
- 230000035699 permeability Effects 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 3
- 239000003034 coal gas Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005245 sintering Methods 0.000 abstract 1
- 239000012141 concentrate Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction 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
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/243—Binding; Briquetting ; Granulating with binders inorganic
-
- 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
- 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
- C22B1/248—Binding; Briquetting ; Granulating of metal scrap or alloys
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a production ingredient capable of improving the quality of finished pellets, which comprises the following components in percentage by weight: 77-80% of first magnetite, 2.5-3.5% of second magnetite, 8-12% of hematite, 6-8% of dedusting ash and 1.5-1.9% of bentonite, and the invention also discloses a preparation process of production ingredients capable of improving the quality of finished pellets, wherein the preparation method comprises the following steps: weighing quantitatively, mixing materials, pelletizing and sintering in a proportioning manner; the beneficial effects are that: after the material mixing structure provided by the invention is adopted, the green pellet quality is obviously improved, the air permeability in the furnace is better, the air pressure can be reduced by 1kpa, the coal gas is reduced by 3000m3/h, and the pellet calcination quality is ensured because the temperature of a hematite and a fly ash calcination zone is increased by 20 ℃ (the calcination temperature is increased to 1150 +/-20 ℃ from 1130 +/-20 ℃; the existing material scheme is adopted to better solve the problem of treating the fly ash, a virtuous cycle is established for the utilization of the fly ash, and the method has higher economic benefit and environmental protection effect.
Description
Technical Field
The invention relates to the technical field of production ingredient preparation, in particular to a production ingredient capable of improving the quality of finished pellets and a preparation process thereof.
Background
The pellet production is an artificial rich ore production process for pelletizing and roasting the concentrate powder. The research shows that the proportion change of the ore powder for the pellets has great influence on the pellet quality and the finished product ore strength, and also has great influence on the production fuel consumption and the production cost.
In the prior art, because the raw materials have fine granularity components, the raw pellet granularity and the strength are relatively poor in the pelletizing process, the air permeability in the furnace is directly influenced in the shaft furnace roasting process, and the pellet ore production quality is reduced; therefore, the invention provides a production ingredient capable of improving the quality of finished pellets and a preparation process thereof.
Disclosure of Invention
The invention aims to provide a production ingredient capable of improving the quality of finished pellets and a preparation process thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a production ingredient capable of improving the quality of finished pellets comprises the following components in parts by weight: 77-80% of first magnetite, 2.5-3.5% of second magnetite, 8-12% of hematite, 6-8% of dedusting ash and 1.5-1.9% of bentonite.
Preferably, the magnetite concentrate comprises 77% of first magnetite, 2.5% of second magnetite, 8% of hematite, 6% of dedusting ash and 1.5% of bentonite.
Preferably, the magnetite concentrate comprises 78% of the first magnetite, 2.8% of the second magnetite, 9% of the hematite, 7% of the dedusting ash and 1.6% of bentonite.
Preferably, the magnetite concentrate comprises 79% of first magnetite, 3.2% of second magnetite, 11% of hematite, 7% of dedusting ash and 1.8% of bentonite.
Preferably, the magnetite concentrate comprises 80% of first magnetite, 3.5% of second magnetite, 12% of hematite, 8% of fly ash and 1.9% of bentonite.
Preferably, the first magnetite has a particle size of-200 meshes more than or equal to 93% and a particle size of-325 meshes more than or equal to 73%.
Preferably, the secondary iron ore has a particle size of-200 meshes or more than 90 percent and a particle size of-325 meshes or more than 70 percent.
Preferably, the hematite has a granularity of-200 meshes which is more than or equal to 80 percent and a granularity of-325 meshes which is more than or equal to 60 percent.
Preferably, the granularity of the dedusting ash is-200 meshes more than or equal to 80 percent, 325 meshes more than or equal to 55 percent, and the granularity of the bentonite is-200 meshes more than or equal to 95 percent.
The preparation process of the production ingredients capable of improving the quality of finished pellets comprises the following steps:
the method comprises the following steps: quantitative weighing, namely weighing all the raw materials according to the components;
step two: mixing the materials, namely, weighing the materials in the step one: sequentially putting the first magnetite, the second magnetite, the hematite, the dedusting ash and the bentonite into a mixer and uniformly stirring;
step three: pelletizing, namely putting the mixed material prepared in the step two into a pelletizer for pelletizing;
step four: and (4) blending and burning, namely putting the spherical material prepared in the step three into a shaft furnace for blending and burning, and forming a finished product of the production blending for improving the quality of finished pellets after blending and burning.
Compared with the prior art, the invention has the beneficial effects that:
1. after the material mixing structure provided by the invention is adopted, the green pellet quality is obviously improved, the air permeability in the furnace is better, the air pressure can be reduced by 1kpa, the coal gas is reduced by 3000m3/h, and the pellet calcination quality is ensured because the temperature of a hematite and a fly ash calcination zone is increased by 20 ℃ (the calcination temperature is increased to 1150 +/-20 ℃ from 1130 +/-20 ℃;
2. the compression strength of finished ore is improved by 100N/ore, the drum index is improved by 1%, and the air permeability of the furnace is increased, the yield of the shaft furnace is increased, the gas consumption is reduced, and the production cost of the pellets is reduced due to the improvement of the green pellet quality;
3. the existing material scheme is adopted to better solve the problem of treating the fly ash, a virtuous cycle is established for the utilization of the fly ash, and the method has higher economic benefit and environmental protection effect.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
The invention provides a technical scheme that: a production ingredient capable of improving the quality of finished pellets comprises the following components in parts by weight: 77% of first magnetite, 2.5% of second magnetite, 8% of hematite, 6% of dedusting ash and 1.5% of bentonite.
Wherein, the granularity of the first magnetite is-200 meshes and is more than or equal to 93 percent, and-325 meshes and is more than or equal to 73 percent; the granularity of the secondary iron ore is-200 meshes and is more than or equal to 90 percent, and-325 meshes and is more than or equal to 70 percent; the granularity of hematite ore is-200 meshes and is more than or equal to 80 percent, and-325 meshes and is more than or equal to 60 percent; the granularity of the fly ash is-200 meshes or more than 80 percent, the granularity of-325 meshes or more than 55 percent, and the granularity of the bentonite is-200 meshes or more than 95 percent.
The preparation process of the production ingredients capable of improving the quality of finished pellets comprises the following steps:
the method comprises the following steps: quantitative weighing, namely weighing all the raw materials according to the components;
step two: mixing the materials, namely, weighing the materials in the step one: sequentially putting the first magnetite, the second magnetite, the hematite, the dedusting ash and the bentonite into a mixer and uniformly stirring;
step three: pelletizing, namely putting the mixed material prepared in the step two into a pelletizer for pelletizing;
step four: and (4) blending and burning, namely putting the spherical material prepared in the step three into a shaft furnace for blending and burning, and forming a finished product of the production blending for improving the quality of finished pellets after blending and burning.
Example two
The invention provides a technical scheme that: a production ingredient capable of improving the quality of finished pellets comprises the following components in parts by weight: 78% of first magnetite, 2.8% of second magnetite, 9% of hematite, 7% of dedusting ash and 1.6% of bentonite.
Wherein, the granularity of the first magnetite is-200 meshes and is more than or equal to 93 percent, and-325 meshes and is more than or equal to 73 percent; the granularity of the secondary iron ore is-200 meshes and is more than or equal to 90 percent, and-325 meshes and is more than or equal to 70 percent; the granularity of hematite ore is-200 meshes and is more than or equal to 80 percent, and-325 meshes and is more than or equal to 60 percent; the granularity of the fly ash is-200 meshes or more than 80 percent, the granularity of-325 meshes or more than 55 percent, and the granularity of the bentonite is-200 meshes or more than 95 percent.
The preparation process of the production ingredients capable of improving the quality of finished pellets comprises the following steps:
the method comprises the following steps: quantitative weighing, namely weighing all the raw materials according to the components;
step two: mixing the materials, namely, weighing the materials in the step one: sequentially putting the first magnetite, the second magnetite, the hematite, the dedusting ash and the bentonite into a mixer and uniformly stirring;
step three: pelletizing, namely putting the mixed material prepared in the step two into a pelletizer for pelletizing;
step four: and (4) blending and burning, namely putting the spherical material prepared in the step three into a shaft furnace for blending and burning, and forming a finished product of the production blending for improving the quality of finished pellets after blending and burning.
EXAMPLE III
The invention provides a technical scheme that: a production ingredient capable of improving the quality of finished pellets comprises the following components in parts by weight: 79% of first magnetite, 3.2% of second magnetite, 11% of hematite, 7% of dedusting ash and 1.8% of bentonite.
Wherein, the granularity of the first magnetite is-200 meshes and is more than or equal to 93 percent, and-325 meshes and is more than or equal to 73 percent; the granularity of the secondary iron ore is-200 meshes and is more than or equal to 90 percent, and-325 meshes and is more than or equal to 70 percent; the granularity of hematite ore is-200 meshes and is more than or equal to 80 percent, and-325 meshes and is more than or equal to 60 percent; the granularity of the fly ash is-200 meshes or more than 80 percent, the granularity of-325 meshes or more than 55 percent, and the granularity of the bentonite is-200 meshes or more than 95 percent.
The preparation process of the production ingredients capable of improving the quality of finished pellets comprises the following steps:
the method comprises the following steps: quantitative weighing, namely weighing all the raw materials according to the components;
step two: mixing the materials, namely, weighing the materials in the step one: sequentially putting the first magnetite, the second magnetite, the hematite, the dedusting ash and the bentonite into a mixer and uniformly stirring;
step three: pelletizing, namely putting the mixed material prepared in the step two into a pelletizer for pelletizing;
step four: and (4) blending and burning, namely putting the spherical material prepared in the step three into a shaft furnace for blending and burning, and forming a finished product of the production blending for improving the quality of finished pellets after blending and burning.
Example four
The invention provides a technical scheme that: a production ingredient capable of improving the quality of finished pellets comprises the following components in parts by weight: 80% of first magnetite, 3.5% of second magnetite, 12% of hematite, 8% of dedusting ash and 1.9% of bentonite.
Wherein, the granularity of the first magnetite is-200 meshes and is more than or equal to 93 percent, and-325 meshes and is more than or equal to 73 percent; the granularity of the secondary iron ore is-200 meshes and is more than or equal to 90 percent, and-325 meshes and is more than or equal to 70 percent; the granularity of hematite ore is-200 meshes and is more than or equal to 80 percent, and-325 meshes and is more than or equal to 60 percent; the granularity of the fly ash is-200 meshes or more than 80 percent, the granularity of-325 meshes or more than 55 percent, and the granularity of the bentonite is-200 meshes or more than 95 percent.
The preparation process of the production ingredients capable of improving the quality of finished pellets comprises the following steps:
the method comprises the following steps: quantitative weighing, namely weighing all the raw materials according to the components;
step two: mixing the materials, namely, weighing the materials in the step one: sequentially putting the first magnetite, the second magnetite, the hematite, the dedusting ash and the bentonite into a mixer and uniformly stirring;
step three: pelletizing, namely putting the mixed material prepared in the step two into a pelletizer for pelletizing;
step four: and (4) blending and burning, namely putting the spherical material prepared in the step three into a shaft furnace for blending and burning, and forming a finished product of the production blending for improving the quality of finished pellets after blending and burning.
After the material mixing structure provided by the invention is adopted, the green pellet quality is obviously improved, the air permeability in the furnace is better, the air pressure can be reduced by 1kpa, the coal gas is reduced by 3000m3/h, and the pellet calcination quality is ensured because the temperature of a hematite and a fly ash calcination zone is increased by 20 ℃ (the calcination temperature is increased to 1150 +/-20 ℃ from 1130 +/-20 ℃; the compression strength of finished ore is improved by 100N/ore, the drum index is improved by 1%, and the air permeability of the furnace is increased, the yield of the shaft furnace is increased, the gas consumption is reduced, and the production cost of the pellets is reduced due to the improvement of the green pellet quality; the existing material scheme is adopted to better solve the problem of treating the fly ash, a virtuous cycle is established for the utilization of the fly ash, and the method has higher economic benefit and environmental protection effect.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A production ingredient capable of improving the quality of finished pellets, which is characterized in that; the formula of the production ingredient comprises the following components: 77-80% of first magnetite, 2.5-3.5% of second magnetite, 8-12% of hematite, 6-8% of dedusting ash and 1.5-1.9% of bentonite.
2. The production batch capable of improving the quality of finished pellets according to claim 1, wherein the production batch comprises the following components in percentage by weight: comprises 77% of first magnetite, 2.5% of second magnetite, 8% of hematite, 6% of dedusting ash and 1.5% of bentonite.
3. The production batch capable of improving the quality of finished pellets according to claim 1, wherein the production batch comprises the following components in percentage by weight: comprises 78% of first magnetite, 2.8% of second magnetite, 9% of hematite, 7% of dedusting ash and 1.6% of bentonite.
4. The production batch capable of improving the quality of finished pellets according to claim 1, wherein the production batch comprises the following components in percentage by weight: comprising 79 percent of first magnetite, 3.2 percent of second magnetite, 11 percent of hematite, 7 percent of dedusting ash and 1.8 percent of bentonite.
5. The production batch capable of improving the quality of finished pellets according to claim 1, wherein the production batch comprises the following components in percentage by weight: comprises 80 percent of first magnetite, 3.5 percent of second magnetite, 12 percent of hematite, 8 percent of dedusting ash and 1.9 percent of bentonite.
6. The production batch capable of improving the quality of finished pellets according to claim 1, wherein the production batch comprises the following components in percentage by weight: the granularity of the first magnetite is-200 meshes and is more than or equal to 93 percent, and the granularity of-325 meshes and is more than or equal to 73 percent.
7. The production batch capable of improving the quality of finished pellets according to claim 1, wherein the production batch comprises the following components in percentage by weight: the granularity of the secondary iron ore is-200 meshes or more than 90 percent, and-325 meshes or more than 70 percent.
8. The production batch capable of improving the quality of finished pellets according to claim 1, wherein the production batch comprises the following components in percentage by weight: the granularity of the hematite ore is-200 meshes and is more than or equal to 80 percent, and-325 meshes and is more than or equal to 60 percent.
9. The production batch capable of improving the quality of finished pellets according to claim 1, wherein the production batch comprises the following components in percentage by weight: the granularity of the fly ash is-200 meshes or more than 80%, the granularity of-325 meshes or more than 55%, and the granularity of the bentonite is-200 meshes or more than 95%.
10. A process for preparing a production batch for improving the quality of finished pellets as claimed in any one of claims 1 to 9, wherein: the preparation method comprises the following steps:
the method comprises the following steps: quantitative weighing, namely weighing all the raw materials according to the components;
step two: mixing the materials, namely, weighing the materials in the step one: sequentially putting the first magnetite, the second magnetite, the hematite, the dedusting ash and the bentonite into a mixer and uniformly stirring;
step three: pelletizing, namely putting the mixed material prepared in the step two into a pelletizer for pelletizing;
step four: and (4) blending and burning, namely putting the spherical material prepared in the step three into a shaft furnace for blending and burning, and forming a finished product of the production blending for improving the quality of finished pellets after blending and burning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110902179.XA CN113584303A (en) | 2021-08-06 | 2021-08-06 | Production ingredient capable of improving quality of finished pellets and preparation process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110902179.XA CN113584303A (en) | 2021-08-06 | 2021-08-06 | Production ingredient capable of improving quality of finished pellets and preparation process thereof |
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| Publication Number | Publication Date |
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| CN113584303A true CN113584303A (en) | 2021-11-02 |
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| CN202110902179.XA Pending CN113584303A (en) | 2021-08-06 | 2021-08-06 | Production ingredient capable of improving quality of finished pellets and preparation process thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104357657A (en) * | 2014-12-02 | 2015-02-18 | 内蒙古包钢钢联股份有限公司 | Method for preparing oxidized pellets from converter dedusting ash |
| CN107282260A (en) * | 2017-07-20 | 2017-10-24 | 山东钢铁集团日照有限公司 | A kind of pellet screening reuse method |
| CN107739820A (en) * | 2017-10-24 | 2018-02-27 | 山西太钢不锈钢股份有限公司 | Magnetite powder pellet and its production method |
| WO2018170767A1 (en) * | 2017-03-22 | 2018-09-27 | 首钢总公司 | Ore pellet, preparation method therefor, and preparation equipment |
-
2021
- 2021-08-06 CN CN202110902179.XA patent/CN113584303A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104357657A (en) * | 2014-12-02 | 2015-02-18 | 内蒙古包钢钢联股份有限公司 | Method for preparing oxidized pellets from converter dedusting ash |
| WO2018170767A1 (en) * | 2017-03-22 | 2018-09-27 | 首钢总公司 | Ore pellet, preparation method therefor, and preparation equipment |
| CN107282260A (en) * | 2017-07-20 | 2017-10-24 | 山东钢铁集团日照有限公司 | A kind of pellet screening reuse method |
| CN107739820A (en) * | 2017-10-24 | 2018-02-27 | 山西太钢不锈钢股份有限公司 | Magnetite powder pellet and its production method |
Non-Patent Citations (1)
| Title |
|---|
| 卢可可等: "鄂西某赤铁矿和磁铁矿混合造球试验", 《现代矿业》 * |
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