CN114917734A - Dry-process curing desulfurizer and preparation method thereof - Google Patents
Dry-process curing desulfurizer and preparation method thereof Download PDFInfo
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- CN114917734A CN114917734A CN202210560491.XA CN202210560491A CN114917734A CN 114917734 A CN114917734 A CN 114917734A CN 202210560491 A CN202210560491 A CN 202210560491A CN 114917734 A CN114917734 A CN 114917734A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 238000001035 drying Methods 0.000 title claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 27
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims abstract description 24
- 239000002893 slag Substances 0.000 claims abstract description 15
- 239000000344 soap Substances 0.000 claims abstract description 13
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000004202 carbamide Substances 0.000 claims abstract description 12
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims abstract description 12
- 239000001095 magnesium carbonate Substances 0.000 claims abstract description 12
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims abstract description 12
- 235000017557 sodium bicarbonate Nutrition 0.000 claims abstract description 12
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 239000011812 mixed powder Substances 0.000 claims description 17
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 238000006477 desulfuration reaction Methods 0.000 claims description 13
- 230000023556 desulfurization Effects 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 13
- 239000000843 powder Substances 0.000 claims description 13
- 238000002485 combustion reaction Methods 0.000 claims description 12
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 238000000227 grinding Methods 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 7
- 238000005303 weighing Methods 0.000 claims description 7
- 239000000428 dust Substances 0.000 claims description 6
- 239000000779 smoke Substances 0.000 claims description 6
- 239000007800 oxidant agent Substances 0.000 claims description 5
- 230000001590 oxidative effect Effects 0.000 claims description 5
- 239000003381 stabilizer Substances 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims 1
- 238000010298 pulverizing process Methods 0.000 claims 1
- 239000003245 coal Substances 0.000 abstract description 15
- 238000000034 method Methods 0.000 abstract description 11
- 230000009467 reduction Effects 0.000 abstract description 8
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 5
- 239000011593 sulfur Substances 0.000 abstract description 5
- 229910052717 sulfur Inorganic materials 0.000 abstract description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 239000006227 byproduct Substances 0.000 abstract description 3
- 235000021190 leftovers Nutrition 0.000 abstract description 3
- 239000001569 carbon dioxide Substances 0.000 abstract description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 2
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 230000003993 interaction Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 231100000252 nontoxic Toxicity 0.000 abstract description 2
- 230000003000 nontoxic effect Effects 0.000 abstract description 2
- 238000003860 storage Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 8
- 230000003009 desulfurizing effect Effects 0.000 description 4
- 238000003756 stirring Methods 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000011499 joint compound Substances 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 235000012245 magnesium oxide Nutrition 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- RYYKJJJTJZKILX-UHFFFAOYSA-M sodium octadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCC([O-])=O RYYKJJJTJZKILX-UHFFFAOYSA-M 0.000 description 1
- 239000010455 vermiculite Substances 0.000 description 1
- 229910052902 vermiculite Inorganic materials 0.000 description 1
- 235000019354 vermiculite Nutrition 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/508—Sulfur oxides by treating the gases with solids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
- B01D45/16—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream, the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/81—Solid phase processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses a dry curing desulfurizer and a preparation method thereof, wherein the dry curing desulfurizer is prepared from the following raw materials in parts by weight: 50-100 parts of soap mud, 30-60 parts of carbide slag, 50-80 parts of urea, 10-30 parts of sodium bicarbonate and 25-50 parts of magnesium carbonate. The invention uses various industrial byproducts and leftovers to realize the interaction of over 95 percent of sulfur fixation (according to SO) 2 Adjustment of the emission concentration by the corresponding addition amount) and reduction of NO X The sulfur-fixing agent is non-toxic, has no potential safety hazard in the processes of production, storage, transportation and use, and has the advantages of partial reduction of coal consumption, reduction of carbon dioxide emission and reduction of environmental pollution when added into coal.
Description
Technical Field
The invention relates to the field of desulfurization and denitrification additives, and particularly relates to a dry-method curing desulfurizer and a preparation method thereof.
Background
In the process of preparing cement, raw materials are required to be calcined into clinker in a rotary kiln by using coal, and the coal can generate a large amount of NO in the combustion process X And SO 2 The smoke pollutes the environment and aims at reducing NO X And SO 2 The existing method is to add the sulfur-fixing agent into the flue gas generated by coal combustion, but the existing sulfur-fixing agent can only fix sulfur elements in coal and raw materials and can not fix nitrogen elements, so that the existing sulfur-fixing agent has poor denitration effect on coal and can not reduce NO X And (4) discharging. In addition, the existing sulfur fixing agent has poor desulfurization effect, cannot meet the existing emission standard, and needs to be further improved.
The soap mud and the carbide slag are industrial waste or byproducts, and how to apply the soap mud and the carbide slag to the sulfur fixing agent to improve the desulfurization effect is an urgent problem to be solved.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: solves the defects of the prior sulfur-fixing agent in the preparation process and the desulfurization and denitrification effects.
In order to solve the technical problems, the invention provides the following technical scheme:
the dry curing desulfurizer is prepared from the following raw materials in parts by weight: 50-100 parts of soap mud, 30-60 parts of carbide slag, 50-80 parts of urea, 10-30 parts of sodium bicarbonate and 25-50 parts of magnesium carbonate.
Preferably, the dry curing desulfurizer is prepared from the following raw materials in parts by weight: 60 parts of soap mud, 40 parts of carbide slag, 80 parts of urea, 10 parts of sodium bicarbonate and 25 parts of magnesium carbonate.
A preparation method of a dry curing desulfurizer comprises the following specific preparation steps:
s1, mixing the soap mud with sodium hydroxide and carbide slag according to the ratio of 3: 1: 2 for 2 hours, drying and grinding into powder to obtain mixed powder I;
s2, weighing the mixed powder I, urea, sodium bicarbonate and magnesium carbonate, and then putting the weighed mixed powder I, urea, sodium bicarbonate and magnesium carbonate into a mixing device to be fully mixed to obtain mixed powder II;
and S3, uniformly conveying the mixed powder II to a feeding pipeline of a grinder through a conveying screw, grinding and grinding the mixed powder II in the grinder, screening qualified fine powder reaching the fineness through an airflow classifier, entering a cyclone collector, collecting the material by the cyclone collector, discharging the material through a discharge valve, collecting the material to a finished product bin for shipment, filtering and collecting dust by a dust collector, and discharging clean air from a fan.
A combustion-promoting sulfur-fixing agent is characterized in that: the dry-process curing desulfurization agent comprises, by weight, 1-3 parts of vanadium pentoxide, 10-20 parts of a strong oxidant, 2-8 parts of a stabilizer, 10-30 parts of a dry-process curing desulfurizer, 15-30 parts of a smoke suppressor and 5-15 parts of a combustion balancing agent.
The invention has the following beneficial effects:
the invention uses various industrial byproducts and leftovers to realize the interaction of sulfur fixation (according to SO) of more than 95 percent 2 Adjustment of emission concentration for corresponding dosing) and reduction of NO X The sulfur-fixing agent is non-toxic, has no potential safety hazard in the processes of production, storage, transportation and use, and has the advantages of partial reduction of coal consumption, reduction of carbon dioxide emission and reduction of environmental pollution when added into coal.
Detailed Description
The following examples are included to provide further detailed description of the present invention and to provide those skilled in the art with a more complete, concise, and exact understanding of the principles and spirit of the invention.
Example 1: the dry curing desulfurizer is prepared by the following method:
s1, weighing 50 parts by weight of soap mud, 10 parts by weight of sodium hydroxide and 30 parts by weight of carbide slag, mixing, standing for 2 hours, drying and grinding into powder to obtain mixed powder I; wherein, the main component of the soap mud is sodium stearate leftovers, and the main component of the carbide slag is calcium oxide.
S2, weighing the mixed powder I, 50 parts by weight of urea, 30 parts by weight of sodium bicarbonate and 50 parts by weight of magnesium carbonate, and then putting the mixture into a mixing device to be fully mixed to obtain mixed powder II;
and S3, uniformly conveying the mixed powder II to a feeding pipeline of a grinder through a conveying screw, grinding and grinding the mixed powder II in the grinder, screening qualified fine powder reaching the fineness through an airflow classifier, entering a cyclone collector, collecting the material by the cyclone collector, discharging the material through a discharge valve, collecting the material to a finished product bin for shipment, filtering and collecting dust by a dust collector, and discharging clean air from a fan.
Example 2: the rest is the same as example 1 except that:
the raw material ratio is as follows: 60 parts of soap mud, 20 parts of sodium hydroxide, 40 parts of carbide slag, 80 parts of urea, 10 parts of sodium bicarbonate and 25 parts of magnesium carbonate.
Example 3: the rest of the process was the same as example 1 except that:
the raw material mixture ratio is 100 weight portions of soap mud, 20 weight portions of sodium hydroxide, 60 weight portions of carbide slag, 65 weight portions of urea, 20 weight portions of sodium bicarbonate and 35 weight portions of magnesium carbonate.
Example 4: the combustion-promoting sulfur-fixing agent is prepared by the following method:
s1, weighing 1 part by weight of vanadium pentoxide, 10 parts by weight of strong oxidant, 2 parts by weight of stabilizer, 10 parts by weight of the dry curing desulfurizer prepared in the embodiment 1, 15 parts by weight of smoke suppressor and 5 parts by weight of combustion balancing agent for later use.
S2, putting the raw materials into a dry powder mixing device, and stirring and mixing uniformly to obtain the powder.
Example 5: the combustion-promoting sulfur-fixing agent is prepared by the following method:
s1, weighing 3 parts by weight of vanadium pentoxide, 20 parts by weight of strong oxidant, 8 parts by weight of stabilizer, 30 parts by weight of the dry-process curing desulfurizer prepared in the embodiment 2, 30 parts by weight of smoke suppressor and 15 parts by weight of combustion balancing agent for later use.
And S2, putting the raw materials into a dry powder mixing device, and stirring and mixing uniformly to obtain the powder.
Example 6: the combustion-promoting sulfur-fixing agent is prepared by the following method:
s1, weighing 2 parts by weight of vanadium pentoxide, 15 parts by weight of strong oxidant, 5 parts by weight of stabilizer, 20 parts by weight of the dry curing desulfurizer prepared in the embodiment 3, 23 parts by weight of smoke suppressor and 10 parts by weight of combustion balancing agent for later use.
And S2, putting the raw materials into a dry powder mixing device, and stirring and mixing uniformly to obtain the powder.
The dry curing desulfurizer or combustion-promoting sulfur-fixing agent powder prepared in the embodiments 1 to 6 is mixed into flue gas after coal combustion according to 3.0 wt% of the coal amount, and NOx and SO in exhaust gas are measured after combustion 2 The proportion is reduced, and the calculation formula is as follows:
desulfurization/denitration ratio ═ C 0 -C x )/C 0 100% of C, wherein X For adding a dry-method curing desulfurizer or a combustion-promoting sulfur-fixing agent into the NOx or SO in the coal combustion waste gas 2 The content of (A); c 0 NOx or SO in coal combustion waste gas without adding dry curing desulfurizer or combustion-promoting sulfur-fixing agent 2 The content of (b). The results are as follows:
TABLE 1 desulfurization and desulfurization ratios of various desulfurizing agents
| Group of | Desulfurization proportion (%) | Denitration proportion (%) |
| Example 1 | 85.4 | 73.2 |
| Example 2 | 88.3 | 76.7 |
| Example 3 | 89.1 | 80.2 |
| Example 4 | 93.3 | 88.3 |
| Example 5 | 95.4 | 83.7 |
| Example 6 | 94.2 | 85.2 |
| Desulfurizing agent sold in market | 58.3 | 1.4 |
Commercially available desulfurizing agents are made from microcrystalline kaolin, periclase, carbide slag, red mud, slag, and vermiculite. The invention has less dosage and better effect when used for desulfurization and denitrification of coal combustion waste gas, and when the same amount of commercial desulfurizer is mixed into coal, the optimal dosage can not be reached due to less dosage, so that the desulfurization effect is obviously reduced.
TABLE 2 Effect of different desulfurizing agent addition ratios on desulfurization Effect
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention should not be limited thereby, and any modification made on the basis of the technical solution according to the technical idea proposed by the present invention is within the protection scope of the present invention; the technology not related to the invention can be realized by the prior art.
Claims (4)
1. The dry curing desulfurizer is characterized by being prepared from the following raw materials in parts by weight: 50-100 parts of soap mud, 30-60 parts of carbide slag, 50-80 parts of urea, 10-30 parts of sodium bicarbonate and 25-50 parts of magnesium carbonate.
2. The dry curing desulfurization agent according to claim 1, wherein: 60 parts of soap mud, 40 parts of carbide slag, 80 parts of urea, 10 parts of sodium bicarbonate and 25 parts of magnesium carbonate.
3. A preparation method of a dry curing desulfurizer is characterized by comprising the following steps: the preparation method comprises the following specific steps:
s1, mixing the soap mud with sodium hydroxide and carbide slag according to the weight ratio of 3: 1: 2, mixing and standing for 2 hours, drying and grinding into powder to obtain mixed powder I;
s2, weighing the mixed powder I, urea, sodium bicarbonate and magnesium carbonate, and then putting the weighed mixed powder I, urea, sodium bicarbonate and magnesium carbonate into a mixing device to be fully mixed to obtain mixed powder II;
s3, uniformly conveying the mixed powder II to a feeding pipeline of a pulverizer through a conveying screw, grinding and pulverizing the mixed powder II in the pulverizer, screening qualified fine powder reaching fineness through an airflow classifier to enter a cyclone collector, collecting the material by the cyclone collector, discharging the material through a discharge valve, collecting the material to a finished product bin for shipment, filtering and collecting dust by a dust collector, and discharging clean air from a fan.
4. A combustion-promoting sulfur-fixing agent is characterized in that: the composite material comprises, by weight, 1-3 parts of vanadium pentoxide, 10-20 parts of a strong oxidant, 2-8 parts of a stabilizer, 10-30 parts of a dry curing desulfurizer, 15-30 parts of a smoke suppressor and 5-15 parts of a combustion balancing agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210560491.XA CN114917734A (en) | 2022-05-23 | 2022-05-23 | Dry-process curing desulfurizer and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210560491.XA CN114917734A (en) | 2022-05-23 | 2022-05-23 | Dry-process curing desulfurizer and preparation method thereof |
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| CN114917734A true CN114917734A (en) | 2022-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210560491.XA Pending CN114917734A (en) | 2022-05-23 | 2022-05-23 | Dry-process curing desulfurizer and preparation method thereof |
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| Country | Link |
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| CN (1) | CN114917734A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113731167A (en) * | 2021-09-02 | 2021-12-03 | 昆明理工大学 | Preparation method of modified carbide slag, product and application thereof |
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