CN103319122A - Sludge solidification material prepared by comprehensive utilization of alkaline residues - Google Patents
Sludge solidification material prepared by comprehensive utilization of alkaline residues Download PDFInfo
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- CN103319122A CN103319122A CN2013102471527A CN201310247152A CN103319122A CN 103319122 A CN103319122 A CN 103319122A CN 2013102471527 A CN2013102471527 A CN 2013102471527A CN 201310247152 A CN201310247152 A CN 201310247152A CN 103319122 A CN103319122 A CN 103319122A
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- Prior art keywords
- sludge solidification
- alkaline residue
- solidification material
- comprehensive utilization
- cement
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- 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
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- Treatment Of Sludge (AREA)
Abstract
The invention discloses a sludge solidification material prepared by comprehensive utilization of alkaline residues. The sludge solidification material mainly comprises the following components by weight percent: 50% to 70% of the alkaline residues, 0% to 30% of coal ash, 10% to 20% of cement, 8% to 15% of lime and 0.5% to 2% of excitant. According to the sludge solidification material, the waste alkaline residues are taken as a main raw material which is compounded with industrial wastes or cheap raw materials such as the coal ash, the cement and the lime, so that the reutilization of the industrial wastes is realized, namely, the environmental pollution is decreased; and meanwhile, the production cost of sludge solidification is lowered. Thus, the quality of a sludge solidification product is improved; the applications of the sludge solidification product in engineering constructions such as road foundations and roadbed fillings are realized; and the requirement of constructions on gravels is reduced. As a result, the construction raw material cost and the transportation cost are lowered.
Description
Technical field
The present invention relates to a kind of sludge solidification material, particularly a kind of sludge solidification material that fully utilizes alkaline residue.
Background technology
Mucky soil is at hydrostatic or deposits in flowing water (beach, lake, marsh, the river shoal) environment slowly, contains more organism, unconsolidated saturated weak opaque cohesive soil through what biochemical action formed.Its principal feature be void ratio greater than 1, natural moisture content is greater than liquid limit.According to the void ratio size, can be divided into again mud (sludge, void ratio is greater than 1.5) and mucky soil (sludgy soil, void ratio 1～1.5).Mud and mucky soil have that water-permeable is weak, intensity is low, the compressibility high.Its bearing capacity is generally less than 100 kPas, is regarded as weak foundation soil.Be mainly derived from biological dust, universe atmospheric precipitation and earth's surface soil erosion etc., through the river, the lake is transported to harbour or marine outfall, river, in the river course, regional subsidence alluvials such as harbour and places, rivers marine outfall.The river course is unimpeded normally to be runed with the harbour in order to keep, and need to regularly carry out dredging operation, and the mud that digs out then needs outward transport fixed point the other side, not only can take limited spatial surface, also can cause the wasting of resources, even affect peripheral productive life environment.
Present stage, solvay soda process is adopted in China's soda ash production mostly, accounts for more than 60% of soda ash ultimate production, can produce a large amount of waste residue and liquids in the ammonia-soda process process, soda ash production per ton can produce the waste liquid of the solid-liquid mixed style about 10 cubic metres, and waste residue content is about 3-5% in the waste liquid.The CaCl that alkaline residue mainly generates from the ammonia still process process in the ammonia-soda process flow process
2, CaCO
3The SiO that brings with Wingdale
2, CaCO
3, and a small amount of impurity that does not eliminate and its resultant that are brought by crude salt.Alkaline residue is the high white paste of water ratio, and its natural moisture content can reach 200%, and liquid limit is more than 100%, plastic limit also about 70%, in the situation that fully air-dry, very loose meal during alkaline residue, hole is numerous, intensity is very low.The alkaline residue that discharges is piled into the mountain, makes stockyard periphery soil property be subject to saliferous Eroded, therefore a large amount of idle alkaline residues had both taken a large amount of soils, again environment has been caused ill effect.All the time, all be devoted to solve the utilization research of alkaline residue both at home and abroad, but because the restriction of technique, technology and cost can not solve the problem that discharging is stacked and continued to alkaline residue at all effectively.
Foundation structure layer in the at present domestic foundation works construction is architecture basics mainly with traditional stable materials such as cement, rubbles greatly, and this technique must be exploited mountain stone in a large number, can cause physical environment to have a strong impact on.The stone material mineral reserve are the limited Nonrenewable resources of a kind of reserves simultaneously, and exploitation need to be subject to strict monitoring and restriction.The stone material mining deposits is at skewness in addition, and quality is large, causes stone material to take inconvenience, and simultaneously engineering construction consumption is huge, and this has just greatly strengthened the engineering construction cost.And the mud that the desilting work such as rivers, harbour produce not only has a very wide distribution, quantity is huge, and is that stack on land or the boat ocean is abandoned all can produce environment and comparatively seriously influenced even destroy, and is a kind of waste of resource.
Summary of the invention
For addressing the above problem, the invention discloses a kind of sludge solidification material that fully utilizes alkaline residue, take discarded alkali slag as main component as sludge solidification material, not only fully rationally utilized ammonia alkali manufacture waste, solve the alkaline residue waste discharge and stack problem, also reduce simultaneously the sludge solidification cost, improved the performance of sludge solidification product, enlarged the application of sludge solidification product.
The sludge solidification material of comprehensive utilization alkaline residue disclosed by the invention mainly comprises following composition (by weight percentage): alkaline residue 50-70%; Flyash 0-30%; Cement 10-20%; Lime 8-15%; Exciting agent 0.5-2%.
A kind of improvement of the sludge solidification material of comprehensive utilization alkaline residue disclosed by the invention, described lime satisfies: CaOMgO content 〉=70%, fineness 0.125mm≤15%.
Another improvement of the sludge solidification material of comprehensive utilization alkaline residue disclosed by the invention, described flyash satisfies: the upper surplus of length of side 0.045mm square hole sieve sieve≤45%, loss on ignition≤15%.
Another improvement of the sludge solidification material of comprehensive utilization alkaline residue disclosed by the invention, described exciting agent are silicate.
The effect of alkaline residue in the sludge solidification material of comprehensive utilization alkaline residue disclosed by the invention, the one, the main component of alkaline residue is CaCO
3, CaSO
4Reach the oxide compound of aluminium, iron, silicon, they can be as the integral part of soil skeleton, the 2nd, CaCO
3, Al
2O
3, Fe
2O
3And SiO
2Can between soil, produce cementation.
The effect of flyash is both to have filled soil body particle gap in the sludge solidification material of comprehensive utilization alkaline residue disclosed by the invention, and performance " Micro-aggregate filling effect " can for hydration reaction provides sufficient calcium aluminium mineral, effectively promote hydration reaction again.
The effect of cement component is to generate the aquation gum material through aquation, hydrolysis reaction in the sludge solidification material of comprehensive utilization alkaline residue disclosed by the invention, produces the cementation of soil particle.
The effect of calcium oxide in the sludge solidification material of comprehensive utilization alkaline residue disclosed by the invention, the one, have strong absorptive, can significantly reduce the water ratio at sludge solidification initial stage; The 2nd, calcium oxide absorbs the free water reaction and generates a large amount of calcium hydroxides, for the curing reaction of mud provides suitable alkaline environment, is conducive to the generation of curing reaction.
The effect of exciting agent is to promote that vitreous structure disintegrates in the alkaline residue in the sludge solidification material of comprehensive utilization alkaline residue disclosed by the invention, accelerate the dispersion of alkaline residue and the stripping of active ingredient, form hydrated calcium silicate and drated calcium aluminate, can also effectively excite simultaneously the mineral constituent in the soil particle active, accelerate the aquation process.
The sludge solidification material of comprehensive utilization alkaline residue disclosed by the invention, take alkaline residue as material of main part, cooperate each component of flyash, cement, lime and exciting agent to stir and directly obtain solidify material for homogeneous material, sludge solidification is obtained qualified geotechnological building materials, be widely used in that roadbed embankment, cofferdam dykes and dams, engineering return that soil fills, the multinomial engineering construction field such as hardened ground and planting technique base soil.The application of curing sludge building materials, the occupation of land that had both solved dredging silt is stacked, and the idle alkaline residue that has taken a large amount of soils is fully effectively used, and has avoided it that environment is made a very bad impression, and has realized the recycling of solid waste resource.Reduced simultaneously the difficulty of drawing materials of the basic material of geotechnological construction, reduced engineering construction difficulty and reduction of erection time, reducingd the construction costs.
Embodiment
Below in conjunction with embodiment, further illustrate the present invention, should understand following embodiment and only be used for explanation the present invention and be not used in and limit the scope of the invention.
The sludge solidification material of comprehensive utilization alkaline residue disclosed by the invention mainly comprises following composition (by weight percentage): alkaline residue 50-70%; Flyash 0-30%; Cement 10-20%; Lime 8-15%; Exciting agent 0.5-2%.
As a kind of preferred, described lime satisfies: CaOMgO content 〉=70%, fineness 0.125mm≤15%.
As a kind of preferred, described flyash satisfies: the upper surplus of length of side 0.045mm square hole sieve sieve≤45%, loss on ignition≤15%.
As a kind of preferred, described exciting agent is silicate.
Embodiment one
The weight percent of each component is alkaline residue 65% in the present embodiment; Cement 20%; Lime 14%, exciting agent 1.0%.Wherein cement mark is not less than #325, must not use short-term strength cement simultaneously.After the sludge solidification material of above proportioning fully mixed, 200 kilograms of solidify material of blending and stirring in every cubic metre of mud.The related mud of the present embodiment is common desilting mud, and moisture control is below 80%.Behind the sludge solidification, the length of time 7d unconfined compression strength reach 0.29MPa, the 14d unconfined compression strength reaches 0.33MPa, the 28d unconfined compression strength is 0.52MPa, the its mechanical properties of sludge solidification product trend is stable simultaneously, and simultaneously, the permeability coefficient behind the sludge solidification is less than 10
-7Cm/s.
Embodiment two
The weight percent of each component is alkaline residue 60% in the present embodiment; Flyash 5%; Cement 20%; Lime 14%, exciting agent 1.0%.Wherein cement mark is not less than #325, must not use short-term strength cement simultaneously.After the sludge solidification material of above proportioning fully mixed, 200 kilograms of solidify material of blending and stirring in every cubic metre of mud.The related mud of the present embodiment is common desilting mud, and moisture control is below 80%.Behind the sludge solidification, the length of time 7d unconfined compression strength reach 0.30MPa, the 14d unconfined compression strength reaches 0.34MPa, the 28d unconfined compression strength is 0.51MPa, the its mechanical properties of sludge solidification product trend is stable simultaneously, and simultaneously, the permeability coefficient behind the sludge solidification is less than 10
-7Cm/s.
Embodiment three
The weight percent of each component is alkaline residue 50% in the present embodiment; Flyash 24%; Cement 15%; Lime 10%, exciting agent 1.0%.Wherein cement mark is not less than #325, must not use short-term strength cement simultaneously.After the sludge solidification material of above proportioning fully mixed, 200 kilograms of solidify material of blending and stirring in every cubic metre of mud.The related mud of the present embodiment is common desilting mud, and moisture control is below 80%.Behind the sludge solidification, the length of time 7d unconfined compression strength reach 0.3MPa, the 14d unconfined compression strength reaches 0.36MPa, the 28d unconfined compression strength is 0.48MPa, the its mechanical properties of sludge solidification product trend is stable simultaneously, and simultaneously, the permeability coefficient behind the sludge solidification is less than 10
-7Cm/s.
Embodiment four
The weight percent of each component is alkaline residue 50% in the present embodiment; Flyash 30%; Cement 10%; Lime 8%, exciting agent 2.0%.Wherein cement mark is not less than #325, must not use short-term strength cement simultaneously.After the sludge solidification material of above proportioning fully mixed, 200 kilograms of solidify material of blending and stirring in every cubic metre of mud.The related mud of the present embodiment is common desilting mud, and moisture control is below 80%.Behind the sludge solidification, the length of time 7d unconfined compression strength reach 0.28MPa, the 14d unconfined compression strength reaches 0.34MPa, the 28d unconfined compression strength is 0.50MPa, the its mechanical properties of sludge solidification product trend is stable simultaneously, and simultaneously, the permeability coefficient behind the sludge solidification is less than 10
-7Cm/s.
Embodiment five
The weight percent of each component is alkaline residue 70% in the present embodiment; Cement 18%; Lime 10%, exciting agent 2.0%.Wherein cement mark is not less than #325, must not use short-term strength cement simultaneously.After the sludge solidification material of above proportioning fully mixed, 200 kilograms of solidify material of blending and stirring in every cubic metre of mud.The related mud of the present embodiment is common desilting mud, and moisture control is below 80%.Behind the sludge solidification, the length of time 7d unconfined compression strength reach 0.45MPa, the 14d unconfined compression strength reaches 0.58MPa, the 28d unconfined compression strength is 1.02MPa, the its mechanical properties of sludge solidification product trend is stable simultaneously, and simultaneously, the permeability coefficient behind the sludge solidification is less than 10
-7Cm/s.
The proportioning of each component is not limited to shown in above-described embodiment among the present invention, also comprise simultaneously shown in the present other can't be exhaustive feasible program.
The effect of alkaline residue in the sludge solidification material of comprehensive utilization alkaline residue disclosed by the invention, the one, the main component of alkaline residue is CaCO
3, CaSO
4Reach the oxide compound of aluminium, iron, silicon, they can be as the integral part of soil skeleton, the 2nd, CaCO
3, Al
2O
3, Fe
2O
3And SiO
2Can between soil, produce cementation.
The effect of flyash is both to have filled soil body particle gap in the sludge solidification material of comprehensive utilization alkaline residue disclosed by the invention, and performance " Micro-aggregate filling effect " can for hydration reaction provides sufficient calcium aluminium mineral, effectively promote hydration reaction again.
The effect of cement component is to generate the aquation gum material through aquation, hydrolysis reaction in the sludge solidification material of comprehensive utilization alkaline residue disclosed by the invention, produces the cementation of soil particle.
The effect of calcium oxide in the sludge solidification material of comprehensive utilization alkaline residue disclosed by the invention, the one, have strong absorptive, can significantly reduce the water ratio at sludge solidification initial stage; The 2nd, calcium oxide absorbs the free water reaction and generates a large amount of calcium hydroxides, for the curing reaction of mud provides suitable alkaline environment, is conducive to the generation of curing reaction.
The effect of exciting agent is to promote that vitreous structure disintegrates in the alkaline residue in the sludge solidification material of comprehensive utilization alkaline residue disclosed by the invention, accelerate the dispersion of alkaline residue and the stripping of active ingredient, form hydrated calcium silicate and drated calcium aluminate, can also effectively excite simultaneously the mineral constituent in the soil particle active, accelerate the aquation process.
The sludge solidification material of comprehensive utilization alkaline residue disclosed by the invention, take alkaline residue as material of main part, cooperate each component of flyash, cement, lime and exciting agent to stir and directly obtain solidify material for homogeneous material, sludge solidification is obtained qualified geotechnological building materials, be widely used in that roadbed embankment, cofferdam dykes and dams, engineering return that soil fills, the multinomial engineering construction field such as hardened ground and planting technique base soil.The application of curing sludge building materials, the occupation of land that had both solved dredging silt is stacked, and the idle alkaline residue that has taken a large amount of soils is fully effectively used, and has avoided it that environment is made a very bad impression, and has realized the recycling of solid waste resource.Reduced simultaneously the difficulty of drawing materials of the basic material of geotechnological construction, reduced engineering construction difficulty and reduction of erection time, reducingd the construction costs.
The disclosed technique means of the present invention program is not limited only to the disclosed technique means of above-mentioned technique means, also comprises the technical scheme that is comprised of above technical characterictic arbitrary combination.The above is the specific embodiment of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also are considered as protection scope of the present invention.
Claims (4)
1. sludge solidification material that fully utilizes alkaline residue, it is characterized in that: the sludge solidification material of described comprehensive utilization alkaline residue mainly comprises following composition (by weight percentage): alkaline residue 50-70%; Flyash 0-30%; Cement 10-20%; Lime 8-15%; Exciting agent 0.5-2%.
2. the sludge solidification material of comprehensive utilization alkaline residue according to claim 1 is characterized in that: described lime satisfies: CaOMgO content 〉=70%, fineness 0.125mm≤15%.
3. the sludge solidification material of comprehensive utilization alkaline residue according to claim 1 is characterized in that: described flyash satisfies: the upper surplus of length of side 0.045mm square hole sieve sieve≤45%, loss on ignition≤15%.
4. the sludge solidification material of comprehensive utilization alkaline residue according to claim 1, it is characterized in that: described exciting agent is silicate.
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| CN2013102471527A CN103319122A (en) | 2013-06-21 | 2013-06-21 | Sludge solidification material prepared by comprehensive utilization of alkaline residues |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103949456A (en) * | 2014-04-09 | 2014-07-30 | 北京工业大学 | Treatment method for preventing open-air stacked soda residue mountain from raising dust |
| CN104310941A (en) * | 2014-10-15 | 2015-01-28 | 河北工业大学 | Alkali residue based grouting filling material |
| CN104310818A (en) * | 2014-10-15 | 2015-01-28 | 河北工业大学 | Alkali residue-based cement gel material |
| CN104310893A (en) * | 2014-10-15 | 2015-01-28 | 河北工业大学 | Soil filling material for caustic sludge base construction |
| CN104310890A (en) * | 2014-10-15 | 2015-01-28 | 河北工业大学 | Alkali residue-based roadbed filling material |
| CN105622022A (en) * | 2015-12-31 | 2016-06-01 | 宁波高新区围海工程技术开发有限公司 | Silt curing agent prepared from caustic sludge |
| CN110451748A (en) * | 2019-08-28 | 2019-11-15 | 中交一航局第三工程有限公司 | A kind of paddling process sludge curing agent and the preparation method and application thereof |
| CN111410498A (en) * | 2020-03-25 | 2020-07-14 | 江苏坤泽科技股份有限公司 | Low-chloride-ion-content environment-friendly alkali residue and sludge composite solidified soil |
| CN114873957A (en) * | 2022-05-10 | 2022-08-09 | 福建工程学院 | Waterproof and antibacterial environment-friendly slag soil brick and preparation method thereof |
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| CN102295442A (en) * | 2011-06-27 | 2011-12-28 | 江苏坤泽科技股份有限公司 | Solidifying material for marine dredging and tidal flat sludge |
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| CN1858356A (en) * | 2005-05-25 | 2006-11-08 | 王文举 | Method for preparing road surface structure layer comprehensive stable soil by using caustic sludge instead of quick lime |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103949456A (en) * | 2014-04-09 | 2014-07-30 | 北京工业大学 | Treatment method for preventing open-air stacked soda residue mountain from raising dust |
| CN103949456B (en) * | 2014-04-09 | 2016-09-14 | 北京工业大学 | A kind of processing method preventing air storage alkaline residue mountain airborne dust |
| CN104310818B (en) * | 2014-10-15 | 2016-05-25 | 河北工业大学 | A kind of alkaline residue base class cement gel material |
| CN104310893A (en) * | 2014-10-15 | 2015-01-28 | 河北工业大学 | Soil filling material for caustic sludge base construction |
| CN104310890A (en) * | 2014-10-15 | 2015-01-28 | 河北工业大学 | Alkali residue-based roadbed filling material |
| CN104310941B (en) * | 2014-10-15 | 2016-05-25 | 河北工业大学 | A kind of alkaline residue base slip casting packing material |
| CN104310818A (en) * | 2014-10-15 | 2015-01-28 | 河北工业大学 | Alkali residue-based cement gel material |
| CN104310941A (en) * | 2014-10-15 | 2015-01-28 | 河北工业大学 | Alkali residue based grouting filling material |
| CN105622022A (en) * | 2015-12-31 | 2016-06-01 | 宁波高新区围海工程技术开发有限公司 | Silt curing agent prepared from caustic sludge |
| CN110451748A (en) * | 2019-08-28 | 2019-11-15 | 中交一航局第三工程有限公司 | A kind of paddling process sludge curing agent and the preparation method and application thereof |
| CN111410498A (en) * | 2020-03-25 | 2020-07-14 | 江苏坤泽科技股份有限公司 | Low-chloride-ion-content environment-friendly alkali residue and sludge composite solidified soil |
| CN111410498B (en) * | 2020-03-25 | 2020-12-15 | 江苏坤泽科技股份有限公司 | Low-chloride-ion-content environment-friendly alkali residue and sludge composite solidified soil |
| CN114873957A (en) * | 2022-05-10 | 2022-08-09 | 福建工程学院 | Waterproof and antibacterial environment-friendly slag soil brick and preparation method thereof |
| CN114873957B (en) * | 2022-05-10 | 2023-04-07 | 福建工程学院 | Waterproof and antibacterial environment-friendly slag soil brick and preparation method thereof |
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Application publication date: 20130925 |