CN110817919A - Preparation method of calcium oxide balls regenerated from carbide slag - Google Patents
Preparation method of calcium oxide balls regenerated from carbide slag Download PDFInfo
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- CN110817919A CN110817919A CN201911229031.3A CN201911229031A CN110817919A CN 110817919 A CN110817919 A CN 110817919A CN 201911229031 A CN201911229031 A CN 201911229031A CN 110817919 A CN110817919 A CN 110817919A
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- carbide slag
- calcium oxide
- regenerated
- balls
- calcium carbonate
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- 239000002893 slag Substances 0.000 title claims abstract description 43
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 239000000292 calcium oxide Substances 0.000 title claims abstract description 26
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 36
- 239000002253 acid Substances 0.000 claims abstract description 26
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 18
- 239000000243 solution Substances 0.000 claims abstract description 16
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 14
- 239000012535 impurity Substances 0.000 claims abstract description 13
- 239000000843 powder Substances 0.000 claims abstract description 12
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims abstract description 10
- 238000001914 filtration Methods 0.000 claims abstract description 10
- 239000011259 mixed solution Substances 0.000 claims abstract description 10
- 239000002244 precipitate Substances 0.000 claims abstract description 10
- 239000000047 product Substances 0.000 claims abstract description 9
- 239000002699 waste material Substances 0.000 claims abstract description 9
- 238000005245 sintering Methods 0.000 claims abstract description 8
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 7
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims abstract description 7
- 238000001354 calcination Methods 0.000 claims abstract description 5
- 239000000571 coke Substances 0.000 claims abstract description 5
- 238000001035 drying Methods 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000000227 grinding Methods 0.000 claims abstract description 4
- 238000007598 dipping method Methods 0.000 claims abstract description 3
- 238000007873 sieving Methods 0.000 claims abstract description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 18
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 12
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 claims description 8
- 239000011668 ascorbic acid Substances 0.000 claims description 4
- 235000010323 ascorbic acid Nutrition 0.000 claims description 4
- 229960005070 ascorbic acid Drugs 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000002440 industrial waste Substances 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000008929 regeneration Effects 0.000 abstract description 3
- 238000011069 regeneration method Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 235000012255 calcium oxide Nutrition 0.000 description 16
- 239000007787 solid Substances 0.000 description 6
- 239000002994 raw material Substances 0.000 description 5
- 239000005997 Calcium carbide Substances 0.000 description 4
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 4
- 235000019738 Limestone Nutrition 0.000 description 3
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 3
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 3
- 239000006028 limestone Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229940076638 ascorbic acid and calcium Drugs 0.000 description 2
- VSGNNIFQASZAOI-UHFFFAOYSA-L calcium acetate Chemical compound [Ca+2].CC([O-])=O.CC([O-])=O VSGNNIFQASZAOI-UHFFFAOYSA-L 0.000 description 2
- 239000001639 calcium acetate Substances 0.000 description 2
- 235000011092 calcium acetate Nutrition 0.000 description 2
- 235000015165 citric acid Nutrition 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 239000011268 mixed slurry Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000012265 solid product Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/02—Oxides or hydroxides
- C01F11/04—Oxides or hydroxides by thermal decomposition
- C01F11/06—Oxides or hydroxides by thermal decomposition of carbonates
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention belongs to the technical field of environmental protection of industrial waste residue regeneration, and particularly relates to a preparation method of calcium oxide balls regenerated from carbide slag, which comprises the following steps: (1) crushing the carbide slag by a crusher, and sieving by a sieve with 80-120 meshes to obtain carbide slag powder for later use; (2) then, carrying out dipping impurity removal on the carbide slag powder by using acid liquor and water, carrying out microwave reaction treatment, and filtering and separating to obtain filter residue ferrosilicon impurity A and mixed solution B; (3) drying the impurity A and grinding to obtain a ferrosilicon primary product; introducing carbon dioxide gas into the mixed solution B until the pH of the solution is proper, and filtering to obtain a calcium carbonate precipitate C and a waste acid solution respectively; (4) mixing and stirring acid liquor, coke and calcium carbonate precipitate C to prepare calcium carbonate balls, and calcining the calcium carbonate balls in a high-temperature sintering furnace to obtain the calcium oxide balls used in industry. The method has simple process, environment-friendly utilization of the carbide slag, and capability of improving the economic benefit of enterprises and manufacturing the carbide slag into a product with an additional value.
Description
Technical Field
The invention belongs to the technical field of environmental protection of industrial waste residue regeneration, and particularly relates to a preparation method of calcium oxide balls regenerated from carbide slag.
Background
The carbide slag is a solid product generated after acetylene is obtained by hydrolyzing carbide, is an industrial waste slag, and can be used for preparing epoxypropane, treating acid wastewater, serving as roadbed filling materials, slag brick materials and the like. At present, a small amount of carbide slag is reused as a raw material in China, and most of the carbide slag is industrial solid waste. A large amount of alkaline carbide slag can change the soil property and pollute the environment after being stacked for a long time. Transport and treatment of carbide slag in the carbide industry costs a lot of money and materials, indirectly increasing the production cost of enterprises. The production of calcium carbide raw material quicklime is along with the exploitation of a large amount of limestone mines, and the exploitation of limestone available for enterprises is gradually reduced. In view of this, it has become a major research direction to recycle the industrial waste carbide slag through a simple process to prepare calcium oxide balls as raw materials for calcium carbide.
Disclosure of Invention
The purpose of the invention is: the industrial application method for preparing the calcium oxide balls by the microwave regeneration of the carbide slag solid waste is designed, and the industrial method is simple in process, low in production cost and recyclable in resources.
The technical scheme of the invention is a preparation method of calcium oxide balls regenerated from carbide slag, which comprises the following steps:
(1) crushing the carbide slag by a crusher, and sieving by a sieve with 80-120 meshes to obtain carbide slag powder for later use;
(2) then, carrying out dipping impurity removal on the carbide slag powder by using acid liquor and water, carrying out microwave reaction treatment, and filtering and separating to obtain filter residue ferrosilicon impurity A and mixed solution B;
(3) drying the impurity A and grinding to obtain a ferrosilicon primary product; introducing carbon dioxide gas into the mixed solution B until the pH of the solution is proper, and filtering to obtain a calcium carbonate precipitate C and a waste acid solution respectively;
(4) mixing and stirring acid liquor, coke and calcium carbonate precipitate C to prepare calcium carbonate balls, and calcining the calcium carbonate balls in a high-temperature sintering furnace to obtain the calcium oxide balls used in industry.
Optimally designing, wherein the acid solution in the step (2) is citric acid and/or ascorbic acid and/or acetic acid solution.
The optimal design is carried out, the temperature of the microwave reaction in the step (2) is 10-50 ℃, and the reaction time is 5-50 minutes.
Optimizing the design, and introducing carbon dioxide gas in the step (3) until the pH value of the solution is 10-12.
And (4) optimizing design, wherein the acid liquor in the step (4) is waste acid liquor and/or other acid liquor generated in the step (3).
The optimization design is carried out, the temperature in the high-temperature sintering furnace in the step (4) is 1000-.
Has the advantages that: the invention provides a preparation method of calcium oxide balls regenerated by carbide slag microwaves, which is simple in process, can reduce the purchase and transportation cost of raw materials, can reduce the consumption of calcium oxide products, and protects limestone mineral products which are in short supply of calcium oxide raw materials. The pollution of the carbide slag to the environment is reduced while the calcium oxide balls are prepared. The carbide slag is utilized to be manufactured into a product with additional value, and the economic benefit of an enterprise can be improved.
Drawings
FIG. 1 is a process flow chart of the calcium oxide ball regenerated by carbide slag microwave.
Detailed Description
Embodiment 1, a method for preparing calcium oxide spheres regenerated from carbide slag, comprising the following steps:
(1) taking 200 parts of carbide slag solid generated after acetylene is generated by calcium carbide hydrolysis, putting the carbide slag solid into a pulverizer, pulverizing the carbide slag solid into powder, and performing particle size screening treatment to select powder capable of passing through a 100-mesh screen; (2) putting the powder into a microwave reactor, adding 200 parts of citric acid, 10 parts of ascorbic acid, 10 parts of acetic acid and 400 parts of water, stirring for 1 hour, carrying out microwave reaction treatment at 30 ℃ for 10 minutes, and obtaining filter residue ferrosilicon impurity A and mixed solution B containing citric acid, ascorbic acid and calcium acetate in a filtering separation mode; (3) drying the impurity A for 3 hours, and then crushing for 1 hour to obtain a ferrosilicon primary product; introducing carbon dioxide gas into the mixed solution B until the pH value of the solution is 11, respectively obtaining calcium carbonate precipitate C and low-concentration acid liquor, namely waste acid liquor, in a filtering mode, and recycling part of the obtained low-concentration acid liquor; (4) mixing 25 parts of waste acid solution with 20 parts of coke and purified calcium carbonate precipitate C, stirring for 2 hours, and placing the mixed slurry into a sample embedding machinePressing into balls with diameter of 2-8cm, and sintering the purified calcium carbonate balls in a high-temperature sintering furnace at 1200 deg.CoCalcining for 1 hour to obtain the calcium oxide which can be used industrially.
Embodiment 2, a method for preparing calcium oxide spheres regenerated from carbide slag, comprising the following steps:
(1) taking 500 parts of carbide slag solid generated after acetylene is generated by calcium carbide hydrolysis, putting the carbide slag solid into a pulverizer, pulverizing the carbide slag solid into powder, and carrying out particle size screening treatment to select powder capable of passing through a 120-mesh screen; (2) putting the powder into a microwave reactor, adding 400 parts of citric acid, 100 parts of ascorbic acid, 50 parts of acetic acid and 900 parts of water, stirring for 3 hours, carrying out microwave reaction treatment at 25 ℃ for 30 minutes, obtaining a filter residue ferrosilicon impurity A and a mixed solution B (3) containing citric acid, ascorbic acid and calcium acetate by a filtering and separating mode, drying the impurity A for 6 hours, and then grinding for 3 hours to obtain a ferrosilicon primary product; introducing carbon dioxide gas into the mixed solution B until the pH value of the solution is 11.5, respectively obtaining calcium carbonate precipitate C and low-concentration acid liquor, namely waste acid liquor, in a filtering mode, and recycling part of the obtained low-concentration acid liquor; (4) mixing 40 parts of waste acid solution with 40 parts of coke and purified calcium carbonate precipitate C, stirring for 3 hours, pressing the mixed slurry into balls with the diameter of 2-8cm in a sample embedding machine, and putting the purified calcium carbonate into a high-temperature sintering furnace for 1000 hoursoCalcining for 3 hours to obtain the calcium oxide which can be used industrially.
Claims (6)
1. A preparation method of calcium oxide balls regenerated from carbide slag is characterized by comprising the following steps:
(1) crushing the carbide slag by a crusher, and sieving by a sieve with 80-120 meshes to obtain carbide slag powder for later use;
(2) then, carrying out dipping impurity removal on the carbide slag powder by using acid liquor and water, carrying out microwave reaction treatment, and filtering and separating to obtain filter residue ferrosilicon impurity A and mixed solution B;
(3) drying the impurity A and grinding to obtain a ferrosilicon primary product; introducing carbon dioxide gas into the mixed solution B until the pH of the solution is proper, and filtering to obtain a calcium carbonate precipitate C and a waste acid solution respectively;
(4) mixing and stirring acid liquor, coke and calcium carbonate precipitate C to prepare calcium carbonate balls, and calcining the calcium carbonate balls in a high-temperature sintering furnace to obtain the calcium oxide balls used in industry.
2. The method for preparing the calcium oxide balls regenerated from the carbide slag according to claim 1, which is characterized by comprising the following steps: the acid solution in the step (2) is citric acid and/or ascorbic acid and/or acetic acid solution.
3. The method for preparing the calcium oxide balls regenerated from the carbide slag according to claim 1, which is characterized by comprising the following steps: the microwave reaction in the step (2) is carried out at the temperature of 10-50 ℃ for 5-50 minutes.
4. The method for preparing the calcium oxide balls regenerated from the carbide slag according to claim 1, which is characterized by comprising the following steps: and (4) introducing carbon dioxide gas in the step (3) until the pH value of the solution is 10-12.
5. The method for preparing the calcium oxide balls regenerated from the carbide slag according to claim 1, which is characterized by comprising the following steps: the acid liquor in the step (4) is waste acid liquor and/or other acid liquor generated in the step (3).
6. The method for preparing the calcium oxide balls regenerated from the carbide slag according to claim 1, which is characterized by comprising the following steps: the temperature in the high-temperature sintering furnace in the step (4) is 1000-1400 ℃, and the time is 0.5-4 hours.
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| CN201911229031.3A CN110817919A (en) | 2019-12-04 | 2019-12-04 | Preparation method of calcium oxide balls regenerated from carbide slag |
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| CN201911229031.3A CN110817919A (en) | 2019-12-04 | 2019-12-04 | Preparation method of calcium oxide balls regenerated from carbide slag |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111747437A (en) * | 2020-07-29 | 2020-10-09 | 雅安正兴汉白玉股份有限公司 | Preparation process of ultrafine calcium carbonate powder |
| CN117843258A (en) * | 2024-03-07 | 2024-04-09 | 陕西金泰化学科技集团有限公司 | Calcium oxide calcining process and system by carbide slag carbonization |
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| CN1621351A (en) * | 2003-11-30 | 2005-06-01 | 刘景三 | Method for producing high activity calcium oxide |
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2019
- 2019-12-04 CN CN201911229031.3A patent/CN110817919A/en active Pending
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| CN1621351A (en) * | 2003-11-30 | 2005-06-01 | 刘景三 | Method for producing high activity calcium oxide |
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Non-Patent Citations (1)
| Title |
|---|
| 日本金属学会编: "有色金属冶金", 31 August 1988, 冶金工业出版社, pages: 48 - 49 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111747437A (en) * | 2020-07-29 | 2020-10-09 | 雅安正兴汉白玉股份有限公司 | Preparation process of ultrafine calcium carbonate powder |
| CN117843258A (en) * | 2024-03-07 | 2024-04-09 | 陕西金泰化学科技集团有限公司 | Calcium oxide calcining process and system by carbide slag carbonization |
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