CN115745503B - High-water-content sludge curing agent based on acid-treated industrial waste residues, and preparation method and application thereof - Google Patents
High-water-content sludge curing agent based on acid-treated industrial waste residues, and preparation method and application thereof Download PDFInfo
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- CN115745503B CN115745503B CN202211535191.2A CN202211535191A CN115745503B CN 115745503 B CN115745503 B CN 115745503B CN 202211535191 A CN202211535191 A CN 202211535191A CN 115745503 B CN115745503 B CN 115745503B
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- 239000002440 industrial waste Substances 0.000 title claims abstract description 49
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 46
- 239000010802 sludge Substances 0.000 title claims abstract description 35
- 239000002253 acid Substances 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 239000000843 powder Substances 0.000 claims abstract description 65
- 239000002893 slag Substances 0.000 claims abstract description 55
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 31
- 239000004568 cement Substances 0.000 claims abstract description 26
- 238000010306 acid treatment Methods 0.000 claims abstract description 21
- 229920005646 polycarboxylate Polymers 0.000 claims abstract description 21
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims abstract description 20
- 229910052938 sodium sulfate Inorganic materials 0.000 claims abstract description 20
- 235000011152 sodium sulphate Nutrition 0.000 claims abstract description 20
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 17
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims abstract description 9
- 229910004298 SiO 2 Inorganic materials 0.000 claims abstract description 5
- 239000002245 particle Substances 0.000 claims abstract description 3
- 239000002699 waste material Substances 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 18
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 16
- 238000003723 Smelting Methods 0.000 claims description 10
- 239000002910 solid waste Substances 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 9
- 239000002131 composite material Substances 0.000 claims description 7
- 238000000227 grinding Methods 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 230000001376 precipitating effect Effects 0.000 claims description 5
- 239000008030 superplasticizer Substances 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 239000011701 zinc Substances 0.000 claims description 5
- 229910052725 zinc Inorganic materials 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 13
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 5
- 235000011941 Tilia x europaea Nutrition 0.000 description 5
- 239000004571 lime Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 238000011049 filling Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000002985 plastic film Substances 0.000 description 4
- 229920006255 plastic film Polymers 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 238000000265 homogenisation Methods 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002894 chemical waste Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- 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
- Processing Of Solid Wastes (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention providesThe curing agent for the high-water-content sludge consists of the following components in parts by weight: 500-550 parts of P.O 42.5 cement, 200-250 parts of acid treated industrial waste slag powder, 150-250 parts of lithium slag powder, 100-120 parts of sodium sulfate and 10-15 parts of polycarboxylate water reducer; the industrial waste slag powder after acid treatment is particles with porous structure, and the specific surface area is 600-700m 2 And comprises the following components in percentage by weight: 46-52% SiO 2 8-12% FeSO 4 20-28% of Al 2 O 3 16-22% CaSO 4 . The invention also provides a preparation method of the curing agent and application of the curing agent in curing treatment of high-water-content sludge. The invention uses two industrial waste residues, has the effects of environmental protection and energy saving, and the curing agent has the advantages of simple processing technology, convenient use and better curing effect on sludge with high water content.
Description
Technical Field
The invention relates to the field of solid waste utilization, in particular to a high-water-content sludge curing agent prepared from industrial waste residues after acid treatment, and a preparation method and application thereof.
Background
Industrial waste residue refers to solid waste discharged in the industrial production process, and mainly comprises metallurgical waste residue, mining waste residue, fuel waste residue, chemical waste residue and the like. The industrial waste residue stored in China is huge and still grows at a fast speed every year, so that serious renewable resources and land resources are wasted. Although research on recycling of industrial waste residues has been advanced, a considerable part of treatment methods have problems of high energy consumption and secondary solid waste generation.
The silt is more common in roadbed and pile foundation construction, and in order to meet the requirements of working performance and mechanical property of construction, a large amount of hydraulic materials such as cement and lime are usually applied to the silt, but the construction cost is obviously increased due to the large amount of cement and lime.
Based on the above-mentioned requirements of both solid waste utilization and sludge solidification, many proposals have been made for preparing a sludge solidifying agent using industrial waste residues in the prior art, for example, chinese patent document CN101863609A, CN112374711A, CN102060480A, CN105271630A, CN109678446A, CN106698872a and the like. Industrial waste residues are utilized to different degrees in the curing agents, so that the purposes of consuming solid waste stock, releasing land resources, reducing cement and lime consumption in the curing agents and reducing production cost and energy consumption can be realized to a certain extent, however, the curing effects of the curing agents mentioned in the two patent documents CN101863609A and CN112374711A are greatly influenced by environmental temperature and humidity, and the industrial popularization and application are not facilitated; the water content of the sludge solidified in patent document CN102060480a is only 30%, and is not suitable for the solidification of sludge with high water content. In addition, the strength of the sludge treated by the existing curing agents is slowly increased after curing, and the project with high requirements on the bearing capacity cannot be continuously constructed.
Disclosure of Invention
The invention aims to find an industrial waste residue application method capable of fully exerting the characteristics of industrial waste residues so as to realize efficient utilization of the industrial waste residues.
In order to achieve the above object, the present inventors have found through a great deal of experimental study that the industrial waste residue after the acid treatment can be used to prepare a curing agent for high water content sludge and can achieve a desired curing effect.
Based on the findings, the invention provides a method for preparing a high-water-content sludge curing agent by using acid-treated industrial waste residues, which comprises the following steps:
(1) Grinding the industrial waste residue subjected to acid treatment in a ball mill for 20-30min to obtain waste residue powder;
(2) Mixing 500-550 parts of P.O 42.5 cement, 200-250 parts of the waste slag powder obtained in the step (1), 150-250 parts of lithium slag powder, 100-120 parts of sodium sulfate and 10-15 parts of a polycarboxylate water reducer according to parts by weight; thus obtaining the curing agent for the high-water-content silt.
In the method, the acid-treated industrial waste residue refers to the acid-treated industrial waste residue obtained by putting copper polar mud, zinc slag and other composite nonferrous smelting solid waste into an oxygen-enriched smelting tank to extract scattered metal, reacting in sulfuric acid-containing waste acid solution, and then washing and precipitating. In the industrial waste residue after acid treatment, siO 2 46-52% FeSO 4 Is 8-12% of Al by mass 2 O 3 Is of mass percent of (a)The percentage is 20-28%, caSO 4 The mass percentage of (2) is 16-22%. The initial iron content of the industrial waste residue is high, and after acid treatment, a plurality of pore structures are formed on the surface and inside of the industrial waste residue due to the reaction of iron, so that the industrial waste residue has good grindability, and the grinding energy consumption during production can be reduced. For sludge with higher water content, more water can be fixed by utilizing the loose and porous property of waste residue, and the consistency of the sludge is increased to ensure construction. The sulfate remained after the acid treatment of the waste residue can also excite the active alumina and the active silica of the lithium slag powder and the waste slag powder.
In the preferred method, the step (2) comprises the steps of mixing and homogenizing 500-520 parts by weight of P.O 42.5 cement, 215-230 parts by weight of waste residue powder obtained in the step (1), 150-175 parts by weight of lithium slag powder, 100-110 parts by weight of sodium sulfate and 10-12 parts by weight of polycarboxylate water reducer to obtain the curing agent for the high-water-content sludge.
In the method of the invention, the step (2) is to mix and homogenize 500 parts of P.O 42.5 cement, 225 parts of the obtained waste residue powder, 160 parts of lithium residue powder, 105 parts of sodium sulfate and 10 parts of polycarboxylate water reducer according to parts by weight, so as to obtain the curing agent for the high-water-content sludge.
In the preferred method of the invention, siO in the lithium slag powder in the step (2) 2 50-55% by mass of Al 2 O 3 Is 18-24% by mass of CaSO 4 The mass percentage of (2) is 10-14%.
In the method of the invention, the specific surface area of the waste slag powder in the step (1) is 600-700m 2 /kg。
In the preferred method of the invention, the specific surface area of the lithium slag powder in the step (2) is 600-700m 2 /kg。
In the method of the invention, the water reducing rate of the polycarboxylic acid water reducing agent in the step (2) is 12-15%.
The invention also provides a curing agent for the high-water-content sludge, which comprises the following components in parts by weight: 500-550 parts of P.O 42.5 cement, 200-250 parts of acid treated industrial waste slag powder and 150-2 parts of lithium slag powder50 parts of sodium sulfate 100-120 parts of a polycarboxylate water reducer 10-15 parts; the industrial waste slag powder after acid treatment is particles with porous structure, and the specific surface area is 600-700m 2 And comprises the following components in percentage by weight: 46-52% SiO 2 8-12% FeSO 4 20-28% of Al 2 O 3 16-22% CaSO 4 。
The industrial waste slag powder after acid treatment is prepared by adding copper polar mud, zinc slag and other composite nonferrous smelting solid waste into an oxygen-enriched smelting tank to extract scattered metal, reacting in sulfuric acid-containing waste acid solution, washing and precipitating, and grinding to 600-700m 2 And/kg of the obtained acid-treated industrial waste powder.
The curing agent is preferably prepared from the following components in parts by weight: 500-520 parts of P.O 42.5 cement, 215-230 parts of waste residue powder obtained in the step (1), 150-175 parts of lithium slag powder, 100-110 parts of sodium sulfate and 10-12 parts of polycarboxylate water reducer.
The more preferred curing agent of the invention consists of the following components in parts by weight: 500 parts of P.O 42.5 cement, 225 parts of waste residue powder obtained in the step (1), 160 parts of lithium slag powder, 105 parts of sodium sulfate and 10 parts of polycarboxylate superplasticizer.
In the preferred curing agent of the invention, the specific surface area of the lithium slag powder is 600-700m 2 /kg。
In the preferred curing agent of the invention, siO in the lithium slag powder 2 50-55% by mass of Al 2 O 3 Is 18-24% by mass of CaSO 4 The mass percentage of (2) is 10-14%.
In the preferable curing agent, the water reducing rate of the polycarboxylate water reducer is 12-15%.
The invention also provides application of the curing agent in sludge curing treatment, wherein 5-50 parts of the curing agent is mixed into every 100 parts of sludge by weight. The sludge is preferably sludge with water content not lower than 50%.
The beneficial effects of the invention are mainly represented by the following points:
(1) The industrial waste residue, the sulfuric acid-containing waste acid solution and the lithium slag powder used in the invention are industrial waste, and compared with the traditional cement and lime curing agent, the cost can be greatly reduced.
(2) The industrial waste residue after acid treatment can keep sulfuric acid in sulfuric acid-containing waste acid solution in the form of sulfate, and can excite the pozzolanic activity of silicon dioxide and aluminum oxide in the industrial waste residue powder and lithium residue powder.
(3) The invention utilizes the characteristics of porous structure and large specific surface area of industrial waste residue and lithium slag powder, can treat sludge with higher water content, and has better curing effect on sludge with 70% water content through test verification.
Detailed Description
The following describes specific embodiments of the present invention in detail. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
The invention replaces partial cement and lime in the curing agent with the industrial waste residue after acid treatment, and is assisted with a proper amount of cement, lithium slag powder, sodium sulfate and polycarboxylate water reducer to be homogenized together in a V-shaped mixer to obtain the finished product of the curing agent. Wherein the cement, the industrial waste slag powder after acid treatment, the lithium slag powder, the sodium sulfate and the polycarboxylate superplasticizer are respectively prepared according to the proportion of 500-550 parts of P.O 42.5 cement, 200-250 parts of the industrial waste slag powder after acid treatment, 150-250 parts of the lithium slag powder, 100-120 parts of the sodium sulfate and 10-15 parts of the polycarboxylate superplasticizer.
The specific preparation method of the curing agent comprises the following steps:
(1) Putting copper polar mud, zinc slag and other composite nonferrous smelting solid wastes into an oxygen-enriched smelting tank, extracting scattered metals, reacting in a sulfuric acid-containing waste acid tank, washing and precipitating, and grinding in a ball mill for 20-30min to obtain a specific surface area of 600-700m 2 The industrial waste slag powder after acid treatment comprises the following components in percentage by weight: 46-52% SiO 2 8-12% FeSO 4 20-28% of Al 2 O 3 16-22% CaSO 4 ；
(2) In parts by weight, will500-550 parts of P.O 42.5 cement, 200-250 parts of acid treated industrial waste slag powder obtained in the step (1), 150-250 parts of lithium slag powder, 100-120 parts of sodium sulfate and 10-15 parts of polycarboxylate superplasticizer, and mixing and homogenizing in a V-type mixer; in the lithium slag powder, siO 2 50-55% by mass of Al 2 O 3 Is 18-24% by mass of CaSO 4 Is 10-14% by mass; mixing and homogenizing for 1h to obtain the sludge curing agent.
The following examples are specifically presented according to the above preparation methods:
example 1
According to the mass quantity, 500 parts of P.O 42.5 cement, 225 parts of industrial waste slag powder after acid treatment, 160 parts of lithium slag powder, 105 parts of sodium sulfate and 10 parts of polycarboxylate water reducer are mixed and then sent into a V-shaped mixer for homogenization to prepare a curing agent finished product for standby.
Uniformly stirring a curing agent and sludge with the water content of 70% according to the mass ratio of 1:4, filling the mixture into a cubic test mold with the mass ratio of 70mm multiplied by 70mm, covering a plastic film, curing at normal temperature, and testing the compressive strength of the cured body at different ages. The test results are shown in Table 1:
table 1 example 1 soil-solidified soil compressive strength
。
Comparative example 1
And uniformly stirring P.O 42.5 cement and sludge with the water content of 70% according to the mass ratio of 1:4, filling the mixture into a cubic test mold with the mass ratio of 70mm multiplied by 70mm, covering a plastic film, curing at normal temperature, and testing the compressive strength of a cured body at different ages. The test results are shown in Table 2:
table 2 comparative example 1 soil-solidified soil compressive strength
。
Example 2
According to the mass quantity P.O 42.5 cement 535 parts, acid treated industrial waste slag powder 210 parts, lithium slag powder 160 parts, sodium sulfate 95 parts and polycarboxylate water reducer 10 parts, mixing and then sending into a V-shaped mixer for homogenization to obtain a curing agent finished product for later use.
Uniformly stirring a curing agent and sludge with the water content of 70% according to the mass ratio of 1:4, filling the mixture into a cubic test mold with the mass ratio of 70mm multiplied by 70mm, covering a plastic film, curing at normal temperature, and testing the compressive strength of the cured body at different ages. The test results are shown in Table 3:
TABLE 3 example 2 soil-solidified soil compressive strength
。
Comparative example 2
According to the mass quantity P.O 42.5 cement 535 parts, industrial waste slag powder which is not subjected to acid treatment 210 parts, lithium slag powder 160 parts, sodium sulfate 95 parts and polycarboxylate water reducer 10 parts, mixing and then sending into a V-shaped mixer for homogenization to obtain a curing agent finished product for later use.
Uniformly stirring a curing agent and sludge with the water content of 70% according to the mass ratio of 1:4, filling the mixture into a cubic test mold with the mass ratio of 70mm multiplied by 70mm, covering a plastic film, curing at normal temperature, and testing the compressive strength of the cured body at different ages. The test results are shown in Table 4:
table 4 comparative example 2 soil-solidified soil compressive strength
。
Claims (11)
1. The curing agent for the high-water-content sludge consists of the following components in parts by weight: 500-550 parts of P.O 42.5 cement, 200-250 parts of acid treated industrial waste slag powder, 150-250 parts of lithium slag powder, 100-120 parts of sodium sulfate and 10-15 parts of polycarboxylate water reducer; the industrial waste slag powder after acid treatment is particles with porous structure, and the specific surface area is 600-700m 2 And comprises the following components in percentage by weight: 46-52% SiO 2 8-12% FeSO 4 20-28% of Al 2 O 3 16-22% CaSO 4 The method comprises the steps of carrying out a first treatment on the surface of the By a means ofThe industrial waste slag powder after acid treatment is prepared by putting copper polar mud and zinc slag composite nonferrous smelting solid waste into an oxygen-enriched smelting tank to extract scattered metal, reacting in a sulfuric acid-containing waste acid solution, washing and precipitating, and finally grinding to 600-700m 2 The acid-treated industrial waste powder obtained per kg, in which SiO 2 46-52% FeSO 4 Is 8-12% of Al by mass 2 O 3 Is 20-28% of CaSO 4 The mass percentage of (2) is 16-22%.
2. The curing agent of claim 1, wherein: the composite material consists of the following components in parts by weight: 500-520 parts of P.O 42.5 cement, 215-230 parts of waste residue powder obtained in the step (1), 150-175 parts of lithium slag powder, 100-110 parts of sodium sulfate and 10-12 parts of polycarboxylate water reducer.
3. The curing agent of claim 1, wherein: the composite material consists of the following components in parts by weight: 500 parts of P.O 42.5 cement, 225 parts of waste residue powder obtained in the step (1), 160 parts of lithium slag powder, 105 parts of sodium sulfate and 10 parts of polycarboxylate superplasticizer.
4. The curing agent of claim 1, wherein: the specific surface area of the lithium slag powder is 600-700m 2 /kg; in the lithium slag powder, siO 2 50-55% by mass of Al 2 O 3 Is 18-24% by mass of CaSO 4 The mass percentage of (2) is 10-14%.
5. A method for preparing a high-water-content sludge curing agent by using industrial waste residues after acid treatment comprises the following steps:
(1) Grinding the industrial waste residue after acid treatment in a ball mill for 20-30min to obtain a powder with a surface area of 600-700m 2 Waste residue powder of/kg;
(2) Mixing 500-550 parts of P.O 42.5 cement, 200-250 parts of the waste slag powder obtained in the step (1), 150-250 parts of lithium slag powder, 100-120 parts of sodium sulfate and 10-15 parts of a polycarboxylate water reducer according to parts by weight; thus obtaining the curing agent for the high-water-content silt.
6. The method of claim 5, wherein: (1) The acid-treated industrial waste residue refers to the acid-treated industrial waste residue obtained by putting copper polar mud, zinc slag and other composite nonferrous smelting solid waste into an oxygen-enriched smelting tank to extract scattered metal, reacting in sulfuric acid-containing waste acid solution, and then washing and precipitating.
7. The method of claim 5, wherein: (1) In the industrial waste residue after acid treatment, siO 2 46-52% FeSO 4 Is 8-12% of Al by mass 2 O 3 Is 20-28% of CaSO 4 The mass percentage of (2) is 16-22%.
8. The method of claim 5, wherein: and (2) mixing 500-520 parts of P.O 42.5 cement, 215-230 parts of the waste residue powder obtained in the step (1), 150-175 parts of lithium slag powder, 100-110 parts of sodium sulfate and 10-12 parts of a polycarboxylate water reducer according to parts by weight, and homogenizing to obtain the curing agent for the high-water-content sludge.
9. The method of claim 5, wherein: and (2) mixing 500 parts of P.O 42.5 cement, 225 parts of the obtained waste residue powder, 160 parts of lithium slag powder, 105 parts of sodium sulfate and 10 parts of a polycarboxylate water reducer according to parts by weight, and homogenizing to obtain the curing agent for the high-water-content sludge.
10. The method of claim 5, wherein: the specific surface area of the lithium slag powder in the step (2) is 600-700m 2 /kg; in the lithium slag powder, siO 2 50-55% by mass of Al 2 O 3 Is 18-24% by mass of CaSO 4 The mass percentage of (2) is 10-14%.
11. The use of the curing agent according to any one of claims 1 to 4 in a sludge curing process in which 5 to 50 parts by weight of the curing agent are incorporated per 100 parts by weight of sludge.
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| CN109502937A (en) * | 2018-12-07 | 2019-03-22 | 西南科技大学 | A kind of method of curing sludge and utilize the sludge curing agent for mentioning titanium slag |
| CN109503073A (en) * | 2018-12-05 | 2019-03-22 | 江苏坤泽科技股份有限公司 | A kind of high-moisture percentage riverway sludge rapid curing curing agent and preparation method thereof |
| CN114149202A (en) * | 2021-10-26 | 2022-03-08 | 河海大学 | Dredged sludge curing agent with high water content and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109503073A (en) * | 2018-12-05 | 2019-03-22 | 江苏坤泽科技股份有限公司 | A kind of high-moisture percentage riverway sludge rapid curing curing agent and preparation method thereof |
| CN109502937A (en) * | 2018-12-07 | 2019-03-22 | 西南科技大学 | A kind of method of curing sludge and utilize the sludge curing agent for mentioning titanium slag |
| CN114149202A (en) * | 2021-10-26 | 2022-03-08 | 河海大学 | Dredged sludge curing agent with high water content and preparation method and application thereof |
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