CN105731910A - Method for curing heavy metal sludge by using steel slag - Google Patents
Method for curing heavy metal sludge by using steel slag Download PDFInfo
- Publication number
- CN105731910A CN105731910A CN201610017121.6A CN201610017121A CN105731910A CN 105731910 A CN105731910 A CN 105731910A CN 201610017121 A CN201610017121 A CN 201610017121A CN 105731910 A CN105731910 A CN 105731910A
- Authority
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- Prior art keywords
- slag
- heavy metal
- curing
- steel slag
- maintenance
- Prior art date
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- 239000002893 slag Substances 0.000 title claims abstract description 89
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 10
- 239000010959 steel Substances 0.000 title claims abstract description 10
- 239000010802 sludge Substances 0.000 title abstract 4
- 238000012423 maintenance Methods 0.000 claims abstract description 27
- 239000004568 cement Substances 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000008187 granular material Substances 0.000 claims abstract description 10
- 238000000465 moulding Methods 0.000 claims abstract description 4
- 238000012216 screening Methods 0.000 claims abstract description 3
- 239000010801 sewage sludge Substances 0.000 claims description 25
- 239000000203 mixture Substances 0.000 claims description 17
- 238000003756 stirring Methods 0.000 claims description 8
- 238000002156 mixing Methods 0.000 abstract description 3
- 239000002689 soil Substances 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- 239000000758 substrate Substances 0.000 abstract 2
- 238000005266 casting Methods 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 238000003825 pressing Methods 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
- 238000002386 leaching Methods 0.000 description 24
- 229910052785 arsenic Inorganic materials 0.000 description 13
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 13
- 231100000331 toxic Toxicity 0.000 description 7
- 230000002588 toxic effect Effects 0.000 description 7
- 239000002920 hazardous waste Substances 0.000 description 6
- 238000007711 solidification Methods 0.000 description 6
- 230000008023 solidification Effects 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000001879 gelation Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 235000010288 sodium nitrite Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00767—Uses not provided for elsewhere in C04B2111/00 for waste stabilisation purposes
-
- 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)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Life Sciences & Earth Sciences (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to a method for curing heavy metal sludge by using steel slag, and belongs to the technical field of industrial soil waste resource utilization. The method comprises the following steps: performing steel slag pretreatment, namely, firstly, crushing steel slag, screening granules less than or equal to 2mm, adding water which is 0.12 times of the mass of the granules, uniformly mixing, sealing in a constant-temperature constant-humidity maintenance box, maintaining for 3 hours at the constant temperature of 70 DEG C, and cooling to the room temperature; curing, namely, firstly, uniformly mixing the following components in percentage by mass: 10-90% of steel slag, 1-80% of heavy metal sludge and 1-20% of cement so as to obtain a dry substrate, adding water which accounts for 8% of the mass of the dry substrate, performing casting molding or vibration pressing molding so as to obtain cured blocks, and maintaining the cured blocks in a natural environment for 3-5 days. By adopting the method, not only is the piling problem of steel slag in the prior art solved, but also the problem of heavy metal sludge curing is solved.
Description
Technical field
The present invention relates to a kind of method utilizing slag curing heavy metal mud, belong to industrial solid castoff application technology as the second resource field.
Background technology
Slag is the waste residue produced in steelmaking process, generates temperature high (about 1600 DEG C), and its ore deposit phase composition is similar to clinker, is a kind of material with greater activity.Within 2012, China's slag year quantum of output reaches more than 100,000,000 ton.Domestic iron and steel enterprise, scientific research institution and building materials enterprise, through years of researches, achieve certain progress in steel slag utilization, and slag has been applied successfully to the fields such as building materials, road engineering, agricultural production, furnace refractory and sewage disposal.But, China's slag comprehensive utilization rate is still relatively low, is only about 10%, and at present, slag still to stack, takies a large amount of soil, ecological environment causes certain impact.
Owing to the compound of arsenic is extremely toxic substance, very harmful to environment.For this, how to solidify wherein harmful element and become problem demanding prompt solution.
The present invention is in conjunction with the gelation activity feature of slag, by using with heavy metal sewage sludge and cement mixing.What partly instead of cement while solidifying toxic heavy metal makes consumption, curing (103011738A) relative to a kind of copper mud, the present invention is without adding sodium nitrite and the naphthalene system mixed additive of early strength agent, steam curing is carried out also without by compressing sample, have only to natural environment maintenance 3 to 5 days, all more easy and energy-conservation than the curing (103011738A) of a kind of copper mud from operational means and complexity.
Summary of the invention
For above-mentioned prior art Problems existing and deficiency, the present invention provides a kind of method utilizing slag curing heavy metal mud.The present invention not only solves the stacking problem of slag in prior art, moreover it is possible to solving the problem that heavy metal sewage sludge solidifies, the present invention is achieved through the following technical solutions.
A kind of method utilizing slag curing heavy metal mud, it specifically comprises the following steps that
(1) pretreatment of slag: first screening after slag crushing is taken the≤granule of 2mm, be sealed in constant-temp. and-moisture maintenance after adding the water mix homogeneously of granular mass 0.12 times, be cooled to room temperature after maintenance 3h at constant temperature 70 DEG C；
(2) curing: first by slag, heavy metal sewage sludge, cement according to following mass percent: slag 10～90%, heavy metal sewage sludge 1%～80%, cement 1%～20% mix homogeneously obtain butt, pass through build molding or vibrate compressing acquisition cured block after being subsequently adding the water stirring of butt quality 8%, cured block natural environment maintenance 3～5 days.
Described slag is the stewing slag of heat or hot splashing steel slag.
The square ratio juris utilizing slag curing heavy metal mud is the Fe in slag3+And Si3+Replace the use of portland cement, Fe3+Chance water plays gelation heavy metal and plays fixing package action equally, because containing the f-CaO of about 9% in slag, if it is not processed, cured later block easily produces crack, its later-stage utilization is existed hidden danger, and slag is carried out pretreatment (steam press maintenance) and is contemplated to reduce f-CaO content by the present invention before treatment.Having an advantage in that decreasing cement makes consumption, the comprcssive strength of cured later block increases, and builds field can obtain more utilization at road construction, dam
The invention has the beneficial effects as follows: (1) present invention can not only solve the stacking problem of slag in prior art, moreover it is possible to solve the problem that heavy metal sewage sludge solidifies；(2) present invention can not only adopt slag curing heavy metal mud, and owing to slag itself possesses gelation activity, it is possible to reduce the consumption of cement, it is achieved that recycling, protect environment, reduce production cost.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the invention will be further described.
Embodiment 1
This utilizes the method for slag curing heavy metal mud, and it specifically comprises the following steps that
(1) pretreatment of slag: first (slag is the stewing slag of heat by 500g slag, slag component list is as shown in table 1) broken after screen and take≤the granule of 2mm, it is sealed in constant-temp. and-moisture maintenance after adding the water mix homogeneously of granular mass 0.12 times, at constant temperature 70 DEG C, is cooled to room temperature after maintenance 3h；
(2) curing: first by slag, heavy metal sewage sludge (heavy metal sewage sludge component list is as shown in table 2), cement according to following mass percent: slag 10%, heavy metal sewage sludge 70%, cement 20% mix homogeneously obtain butt, it is subsequently adding after the water stirring of butt quality 8% by vibrating the compressing acquisition cured block cylinder of high 50mm (the diameter 50mm), cured block natural environment maintenance 3 days.
Table 1
Table 2
The cured block that the present embodiment prepares is tested after standing 3～6h, and 28 days comprcssive strength is 10MPa；Before solidifying, arsenic element leaches result is 398.65mg/L, leaching arsenic Elements Leaching≤0.01mg/L after solidification, Leaching be up to state standards " hazardous waste judging standard----leaching characteristic identification " (GB115085.3-1996) toxic leach standard≤5mg/L, finished product use safety.
Embodiment 2
This utilizes the method for slag curing heavy metal mud, and it specifically comprises the following steps that
(1) pretreatment of slag: first (slag is the stewing slag of heat by 500g slag, slag component list is as shown in table 1) broken after screen and take≤the granule of 2mm, it is sealed in constant-temp. and-moisture maintenance after adding the water mix homogeneously of granular mass 0.12 times, at constant temperature 70 DEG C, is cooled to room temperature after maintenance 3h；
(2) curing: first by slag, heavy metal sewage sludge (heavy metal sewage sludge component list is as shown in table 2), cement according to following mass percent: slag 40%, heavy metal sewage sludge 50%, cement 10% mix homogeneously obtain butt, it is subsequently adding after the water stirring of butt quality 8% by vibrating the compressing acquisition cured block cylinder of high 50mm (the diameter 50mm), cured block natural environment maintenance 5 days.
The cured block that the present embodiment prepares is tested after standing 3～6h, and 28 days comprcssive strength is 12MPa；Before solidifying, arsenic element leaches result is 398.65mg/L, leaching arsenic Elements Leaching≤0.01mg/L after solidification, Leaching be up to state standards " hazardous waste judging standard----leaching characteristic identification " (GB115085.3-1996) toxic leach standard≤5mg/L, finished product use safety.
Embodiment 3
This utilizes the method for slag curing heavy metal mud, and it specifically comprises the following steps that
(1) pretreatment of slag: first (slag is the stewing slag of heat by 500g slag, slag component list is as shown in table 1) broken after screen and take≤the granule of 2mm, it is sealed in constant-temp. and-moisture maintenance after adding the water mix homogeneously of granular mass 0.12 times, at constant temperature 70 DEG C, is cooled to room temperature after maintenance 3h；
(2) curing: first by slag, heavy metal sewage sludge (heavy metal sewage sludge component list is as shown in table 2), cement according to following mass percent: slag 85%, heavy metal sewage sludge 10%, cement 5% mix homogeneously obtain butt, it is subsequently adding after the water stirring of butt quality 8% by vibrating the compressing acquisition cured block cylinder of high 50mm (the diameter 50mm), cured block natural environment maintenance 5 days.
The cured block that the present embodiment prepares is tested after standing 3～6h, and 28 days comprcssive strength is 21MPa；Before solidifying, arsenic element leaches result is 398.65mg/L, leaching arsenic Elements Leaching≤0.01mg/L after solidification, Leaching be up to state standards " hazardous waste judging standard----leaching characteristic identification " (GB115085.3-1996) toxic leach standard≤5mg/L, finished product use safety.
Embodiment 4
This utilizes the method for slag curing heavy metal mud, and it specifically comprises the following steps that
(1) pretreatment of slag: first (slag is the stewing slag of heat by 500g slag, slag component list is as shown in table 1) broken after screen and take≤the granule of 2mm, it is sealed in constant-temp. and-moisture maintenance after adding the water mix homogeneously of granular mass 0.12 times, at constant temperature 70 DEG C, is cooled to room temperature after maintenance 3h；
(2) curing: first by slag, heavy metal sewage sludge (heavy metal sewage sludge component list is as shown in table 2), cement according to following mass percent: slag 89%, heavy metal sewage sludge 1%, cement 10% mix homogeneously obtain butt, it is subsequently adding after the water stirring of butt quality 8% by vibrating the compressing acquisition cured block cylinder of high 50mm (the diameter 50mm), cured block natural environment maintenance 5 days.
The cured block that the present embodiment prepares is tested after standing 3～6h, and 28 days comprcssive strength is 23MPa；Before solidifying, arsenic element leaches result is 398.65mg/L, leaching arsenic Elements Leaching≤0.01mg/L after solidification, Leaching be up to state standards " hazardous waste judging standard----leaching characteristic identification " (GB115085.3-1996) toxic leach standard≤5mg/L, finished product use safety.
Embodiment 5
This utilizes the method for slag curing heavy metal mud, and it specifically comprises the following steps that
(1) pretreatment of slag: first (slag is the stewing slag of heat by 500g slag, slag component list is as shown in table 1) broken after screen and take≤the granule of 2mm, it is sealed in constant-temp. and-moisture maintenance after adding the water mix homogeneously of granular mass 0.12 times, at constant temperature 70 DEG C, is cooled to room temperature after maintenance 3h；
(2) curing: first by slag, heavy metal sewage sludge (heavy metal sewage sludge component list is as shown in table 2), cement according to following mass percent: slag 10%, heavy metal sewage sludge 80%, cement 10% mix homogeneously obtain butt, it is subsequently adding after the water stirring of butt quality 8% by vibrating the compressing acquisition cured block cylinder of high 50mm (the diameter 50mm), cured block natural environment maintenance 5 days.
The cured block that the present embodiment prepares is tested after standing 3～6h, and 28 days comprcssive strength is 11MPa；Before solidifying, arsenic element leaches result is 398.65mg/L, leaching arsenic Elements Leaching≤0.01mg/L after solidification, Leaching be up to state standards " hazardous waste judging standard----leaching characteristic identification " (GB115085.3-1996) toxic leach standard≤5mg/L, finished product use safety.
Embodiment 6
This utilizes the method for slag curing heavy metal mud, and it specifically comprises the following steps that
(1) pretreatment of slag: first (slag is the stewing slag of heat by 500g slag, slag component list is as shown in table 1) broken after screen and take≤the granule of 2mm, it is sealed in constant-temp. and-moisture maintenance after adding the water mix homogeneously of granular mass 0.12 times, at constant temperature 70 DEG C, is cooled to room temperature after maintenance 3h；
(2) curing: first by slag, heavy metal sewage sludge (heavy metal sewage sludge component list is as shown in table 2), cement according to following mass percent: slag 40%, heavy metal sewage sludge 59%, cement 1% mix homogeneously obtain butt, it is subsequently adding after the water stirring of butt quality 8% by vibrating the compressing acquisition cured block cylinder of high 50mm (the diameter 50mm), cured block natural environment maintenance 5 days.
The cured block that the present embodiment prepares is tested after standing 3～6h, and 28 days comprcssive strength is 12MPa；Before solidifying, arsenic element leaches result is 398.65mg/L, leaching arsenic Elements Leaching≤0.01mg/L after solidification, Leaching be up to state standards " hazardous waste judging standard----leaching characteristic identification " (GB115085.3-1996) toxic leach standard≤5mg/L, finished product use safety.
Above the specific embodiment of the present invention is explained in detail, but the present invention is not limited to above-mentioned embodiment, in the ken that those of ordinary skill in the art possess, it is also possible under the premise without departing from present inventive concept, make various change.
Claims (2)
1. the method utilizing slag curing heavy metal mud, it is characterised in that specifically comprise the following steps that
(1) pretreatment of slag: first screening after slag crushing is taken the≤granule of 2mm, be sealed in constant-temp. and-moisture maintenance after adding the water mix homogeneously of granular mass 0.12 times, be cooled to room temperature after maintenance 3h at constant temperature 70 DEG C；
(2) curing: first by slag, heavy metal sewage sludge, cement according to following mass percent: slag 10～90%, heavy metal sewage sludge 1%～80%, cement 1%～20% mix homogeneously obtain butt, pass through build molding or vibrate compressing acquisition cured block after being subsequently adding the water stirring of butt quality 8%, cured block natural environment maintenance 3～5 days.
2. the method utilizing slag curing heavy metal mud according to claim 1, it is characterised in that: described slag is the stewing slag of heat or hot splashing steel slag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610017121.6A CN105731910B (en) | 2016-01-12 | 2016-01-12 | A method of utilizing slag curing heavy metal sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610017121.6A CN105731910B (en) | 2016-01-12 | 2016-01-12 | A method of utilizing slag curing heavy metal sludge |
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| Publication Number | Publication Date |
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| CN105731910A true CN105731910A (en) | 2016-07-06 |
| CN105731910B CN105731910B (en) | 2018-08-31 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106365541A (en) * | 2016-08-31 | 2017-02-01 | 昆明钢铁控股有限公司 | Multifunctional steel-slag ecological environment-friendly water-permeable brick and preparation method thereof |
| CN109850978A (en) * | 2019-01-23 | 2019-06-07 | 昆明理工大学 | A kind of heavy nonferrous smelting sewage and sludge integral treatment method |
| CN110746168A (en) * | 2019-09-23 | 2020-02-04 | 昆明理工大学 | Method for solidifying arsenic-containing sludge by steel slag and silica fume cementing material |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102249609A (en) * | 2011-04-29 | 2011-11-23 | 昆明理工大学 | Arsenic-containing waste slag solidified body and preparation method thereof |
| CN103011738A (en) * | 2013-01-15 | 2013-04-03 | 昆明理工大学 | Curing method of copper sludge |
-
2016
- 2016-01-12 CN CN201610017121.6A patent/CN105731910B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102249609A (en) * | 2011-04-29 | 2011-11-23 | 昆明理工大学 | Arsenic-containing waste slag solidified body and preparation method thereof |
| CN103011738A (en) * | 2013-01-15 | 2013-04-03 | 昆明理工大学 | Curing method of copper sludge |
Non-Patent Citations (1)
| Title |
|---|
| 廖天鹏 等: "铜污泥中重金属形态分布及浸出毒性分析", 《化工进展》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106365541A (en) * | 2016-08-31 | 2017-02-01 | 昆明钢铁控股有限公司 | Multifunctional steel-slag ecological environment-friendly water-permeable brick and preparation method thereof |
| CN109850978A (en) * | 2019-01-23 | 2019-06-07 | 昆明理工大学 | A kind of heavy nonferrous smelting sewage and sludge integral treatment method |
| CN109850978B (en) * | 2019-01-23 | 2022-05-27 | 昆明理工大学 | Integrated treatment method for heavy color smelting sewage and sludge |
| CN110746168A (en) * | 2019-09-23 | 2020-02-04 | 昆明理工大学 | Method for solidifying arsenic-containing sludge by steel slag and silica fume cementing material |
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| CN105731910B (en) | 2018-08-31 |
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