CN113968684B - Method for treating stainless steel pickling sludge and preparing slag cement - Google Patents
Method for treating stainless steel pickling sludge and preparing slag cement Download PDFInfo
- Publication number
- CN113968684B CN113968684B CN202111215501.8A CN202111215501A CN113968684B CN 113968684 B CN113968684 B CN 113968684B CN 202111215501 A CN202111215501 A CN 202111215501A CN 113968684 B CN113968684 B CN 113968684B
- Authority
- CN
- China
- Prior art keywords
- slag
- stainless steel
- pickling sludge
- steel pickling
- cement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
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
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/48—Clinker treatment
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention provides a method for treating stainless steel pickling sludge and preparing slag cement, and relates to the technical field of metallurgy. The method for treating stainless steel pickling sludge and preparing slag cement, provided by the invention, comprises the following steps: mixing the stainless steel pickling sludge, the molten blast furnace slag and a modifier to obtain molten slag; performing cold quenching on the molten slag to obtain granulated slag; grinding the granulated slag to obtain slag powder; and mixing the slag powder and the silicate cement clinker to obtain the slag cement. The invention mixes the stainless steel acid-washing sludge and the molten blast furnace slag, and then quenches the mixture into granulated slag, and then uses slag powder obtained by grinding the granulated slag as a cement admixture to prepare the slag cement, thereby providing an effective way for recycling and harmlessly treating the stainless steel acid-washing sludge.
Description
Technical Field
The invention relates to the technical field of metallurgy, in particular to a method for treating stainless steel pickling sludge and preparing slag cement.
Background
The stainless steel pickling sludge is solid waste precipitated by lime-adding waste water generated by pickling in order to ensure surface smoothness in the stainless steel production process, and is definitely classified as dangerous solid waste because Cr (VI) leaching of the solid waste exceeds the national standard. Stainless steel pickling sludge produced by using sulfuric acid as pickling medium and containing Fe as main component 2 O 3 20～35wt％，CaSO 4 45～60wt％，Cr 2 O 3 1～6wt％，SiO 2 2-3 wt%, and no effective treatment way exists for the acid-washing sludge at present. The conventional practice of enterprises is stockpiling or adding a small amount of the raw materials into a sintering process, but the quality of sintered ore products is reduced, and the process pollution is serious (CaSO) 4 Decomposition to SO 2 ) And the like, and an effective large-scale treatment approach is urgently needed. Accordingly, the present invention is directed to stainless steelThe treatment difficulty of the steel pickling sludge is that the slag cement is prepared by combining the molten blast furnace slag and the stainless steel pickling sludge according to the ratio of a physical-chemical solidification method, and the hazardous waste is reasonably treated on the premise of not changing the phase and the application route of the blast furnace slag.
Disclosure of Invention
The invention aims to provide a method for treating stainless steel pickling sludge and preparing slag cement, which comprises the steps of mixing the stainless steel pickling sludge with molten blast furnace slag, carrying out cold quenching on the mixture to obtain granulated slag, and then using slag powder obtained by grinding the granulated slag as a cement admixture to prepare the slag cement, thereby providing an effective way for recycling and harmlessly treating the stainless steel pickling sludge.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a method for treating stainless steel pickling sludge and preparing slag cement, which comprises the following steps:
mixing the stainless steel pickling sludge, the molten blast furnace slag and a modifier to obtain molten slag;
performing cold quenching on the molten slag to obtain granulated slag;
grinding the granulated slag to obtain slag powder;
and mixing the slag powder and the silicate cement clinker to obtain the slag cement.
Preferably, the water content of the stainless steel pickling sludge is below 5 wt%.
Preferably, the total amount of the stainless steel pickling sludge is 1-10 wt% of the molten blast furnace slag.
Preferably, the temperature of the molten blast furnace slag is 1400-1450 ℃.
Preferably, the mixing time of the stainless steel pickling sludge, the molten blast furnace slag and the modifier is 3-10 min.
Preferably, the cooling rate of the cold quenching is 300-500 ℃/min.
Preferably, the particle size of the slag powder is less than 0.1 mm; the specific surface area of the slag powder is 500m 2 More than kg.
Preferably, the mass ratio of the slag powder to the portland cement clinker is 40-50: 50-60.
Preferably, the modifier is a siliceous modifier; the total addition amount of the modifier is 1-5 wt% of the molten blast furnace slag.
Preferably, the stainless steel pickling sludge is pickling sludge generated by using sulfuric acid as a pickling medium in a stainless steel production enterprise; the stainless steel pickling sludge comprises CaSO 4 45～60wt％，Fe 2 O 3 20～35wt％，Cr 2 O 3 1～6wt％，SiO 2 2～3wt％。
The invention provides a method for treating stainless steel pickling sludge and preparing slag cement, which comprises the following steps: mixing the stainless steel pickling sludge, the molten blast furnace slag and a modifier to obtain molten slag; performing cold quenching on the molten slag to obtain granulated slag; grinding the granulated slag to obtain slag powder; and mixing the slag powder and the silicate cement clinker to obtain the slag cement. The invention adds stainless steel acid-washing sludge after blast furnace slag discharge, and then carries out cold quenching treatment, more than 99 percent of granulated slag after cold quenching is glass phase, the minimum part is fine dispersed magnesia-chrome spinel phase (part of blast furnace slag contains a small part of MgO, Cr-containing spinel is added in a molten state 2 O 3 The acid-washing sludge can generate a corresponding small amount of magnesium-chromium spinel phase), the glass phase and the magnesium-chromium spinel phase are mineral phases with the best chromium fixing effect, and the granulated slag after cold quenching can be used as an admixture for preparing slag cement; after the slag cement is prepared, the glass phase and the magnesium-chromium spinel phase are both wrapped in a gel phase generated by cement hydration, and the Cr element curing effect is obvious and is far lower than the standard value of 0.2mg/L of Cr leaching in the sintered clinker specified in GB 30760-2014.
The invention provides an effective way for harmless, resource and large-scale treatment of the stainless steel pickling sludge, such dangerous solid waste, and has great environmental and economic benefits.
The treatment method provided by the invention is simple to implement, has no additional equipment, can be implemented on the production site, and has low cost and high practical popularization value.
Drawings
FIG. 1 is an SEM image of granulated slag prepared in example 1;
FIG. 2 is a SEM-EDS photograph of magnesia chrome spinel phase at high magnification of the granulated slag prepared in example 1;
FIG. 3 is an EDS surface scan energy spectrum of magnesium chromium spinel;
FIG. 4 is an XRD pattern of the granulated slag prepared in examples 1 and 2;
FIG. 5 is a graph showing the comparison of the compressive strength of the granulated slag added with the sludge and the normal blast furnace granulated slag after 28 days of hydration;
FIG. 6 is a flow chart of a slag cement production process.
Detailed Description
The invention provides a method for treating stainless steel pickling sludge and preparing slag cement, which comprises the following steps:
mixing the stainless steel pickling sludge, the molten blast furnace slag and a modifier to obtain molten slag;
performing cold quenching on the molten slag to obtain granulated slag;
grinding the granulated slag to obtain slag powder;
and mixing the slag powder and the silicate cement clinker to obtain the slag cement.
In the present invention, a flow chart of a slag cement production process is shown in FIG. 6, and a detailed description is given of the slag cement production method of the present invention with reference to FIG. 6.
The method mixes the stainless steel pickling sludge, the molten blast furnace slag and the modifier to obtain the molten slag. In the invention, the stainless steel pickling sludge is pickling sludge generated by using sulfuric acid as a pickling medium in a stainless steel production enterprise. In the present invention, the composition of the stainless steel pickling sludge preferably includes CaSO 4 45～60wt％，Fe 2 O 3 20～35wt％，Cr 2 O 3 1～6wt％，SiO 2 2 to 3 wt%. In the present invention, the composition of the stainless steel pickling sludge more preferably includes CaSO 4 55～60wt％，Fe 2 O 3 25～30wt％， Cr 2 O 3 1～3wt％，SiO 2 2～3wt％。
In the present invention, the water content of the stainless steel pickling sludge is preferably 5wt% or less, and more preferably 2 wt%. In the present invention, the slag is prepared at a high temperature, and if the moisture content is high, splashing, even explosion, may occur after pyrolysis at a high temperature, so the water content of the stainless steel pickling sludge is controlled within the above range.
In the invention, the stainless steel pickling sludge is preferably obtained by drying raw stainless steel pickling sludge. In the invention, the water content of the original stainless steel pickling sludge is 10-55%. In the invention, the drying temperature is preferably 300-500 ℃, and more preferably 400 ℃; the drying time is preferably 2-4 h, and more preferably 3 h.
In the invention, the temperature of the molten blast furnace slag is preferably 1400-1450 ℃. In the invention, the molten blast furnace slag is high-temperature liquid slag after the blast furnace is tapped. In the present invention, the MgO content in the molten blast furnace slag is preferably 1 to 8% by mass. The temperature range of the molten blast furnace slag is controlled to be 1400-1450 ℃, the fluidity of the molten slag can be ensured, the temperature is the lower limit of the decomposition temperature of the sulfide, the decomposition is blocked under the mixed impact of the molten slag, and SO is avoided 2 A large amount of gas escapes.
In the invention, the total amount of the stainless steel pickling sludge is 1-10 wt%, more preferably 5-8 wt% of the molten blast furnace slag.
In the present invention, the modifier is preferably a siliceous modifier; the siliceous modifier preferably comprises one or two of fly ash and waste glass; in the present invention, the total addition amount of the modifier is preferably 1 to 5wt%, more preferably 3 to 4 wt% of the molten blast furnace slag. The modifier can promote more glass phases to be generated.
In the invention, the time for mixing the stainless steel pickling sludge, the molten blast furnace slag and the modifier is preferably 3-10 min, and more preferably 4-6 min.
In the present invention, it is preferable that the stainless steel pickling sludge and the modifying agent are thrown into the molten blast furnace slag in multiple portions, respectively.
The invention utilizes the composition characteristics and physical sensible heat of the blast furnace slag to the maximum extent and melts the blast furnace slagThe stainless steel pickling sludge is treated in a digestion state, the added siliceous modifier can enable more glass phase in the granulated slag to be formed, and the MgO in the blast furnace slag can enable the Cr element in the granulated slag to form MgCr 2 O 4 And (4) phase(s).
After the molten slag is obtained, the invention carries out cold quenching on the molten slag to obtain the granulated slag. In the invention, the cooling rate of the cold quenching is preferably 300-500 ℃/min, and more preferably 350-400 ℃. The invention controls higher cooling rate, and utilizes high-pressure water quenching to ensure that more than 99 percent of granulated slag is glass phase, thereby ensuring the activity and stability of the granulated slag.
In the present invention, MgCr is contained in the slag 2 O 4 The phase and a very small amount of Cr which is not combined with MgO uniformly exist in the glass phase of the water-quenched slag after rapid cold quenching.
After the granulated slag is obtained, the invention grinds the granulated slag to obtain slag powder. In the present invention, the particle size of the slag powder is preferably less than 0.1 mm; the specific surface area of the slag powder is preferably 500m 2 More preferably 600 m/kg or more 2 (iv) kg. The invention grinds the granulated slag into slag powder, which has the function of exciting stronger hydration activity and is used as a filling material.
After the slag powder is obtained, the slag powder and the silicate cement clinker are mixed to obtain the slag cement. In the invention, the mass ratio of the slag powder to the portland cement clinker is preferably 40-50: 50-60.
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It should be apparent that the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
EXAMPLE 1 laboratory test
Drying the original stainless steel pickling sludge with higher water content at 400 ℃ for 2h to obtain stainless steel pickling sludge with 1% water content for later use;
the modifier is fly ash;
uniformly mixing 10g of the stainless steel acid-washing sludge, 3g of a modifier and 100g of blast furnace slag, and placing the mixture in a porcelain boat;
and (3) placing the porcelain boat in a horizontal resistance furnace, heating to 1450 ℃ at the speed of 5 ℃/min, and preserving the temperature for 5min to obtain the molten slag.
Rapidly pulling the porcelain boat out of a high-temperature area, and performing water quenching at a cooling rate of 400 ℃/min to obtain granulated slag;
slag powder (the specific surface area is 689 m) obtained by grinding the granulated slag 2 /kg) and portland cement clinker are mixed according to the mass ratio of 1:1 to obtain slag cement.
Example 2
The method was substantially the same as in example 1, except that the amount of the stainless steel pickling sludge was adjusted from "10 g" to "5 g".
Test example 1
The SEM photograph of the granulated slag prepared in example 1 is shown in FIG. 1, in which FIG. 1, white fine particles are Mg-Cr spinel phase, and other surrounding phases are glass phase.
The SEM-EDS photograph of magnesia chrome spinel phase at high magnification of the granulated slag prepared in example 1 is shown in FIG. 2. In fig. 2, the white particles at 5K × high magnification are magnesia-chrome spinel phases.
FIG. 3 is the EDS profile scan of FIG. 2, in which FIG. 3 the particulate material is predominantly the Mg-Cr spinel phase, with particles having an average size of 5 μm.
The XRD patterns of the granulated slag prepared in examples 1 and 2 are shown in fig. 4. As can be seen from fig. 4, the stainless steel pickling sludge added in the blast furnace slag in 5% and 10% has a main phase of glass phase, which accounts for 99% and 99.5%, respectively, and only a very small amount of gehlenite phase is generated. The slag powder has high potential activity, and can generate hydraulic hard gelling reaction after being mixed with portland cement clinker to prepare slag cement.
Test example 2
The slag cement prepared in example 1 was mixed with standard sand in a ratio of 1: and 3, fully stirring and mixing the mixture with the water-cement ratio of 0.5, filling the mixture into a steel grinding tool with the size of 40 multiplied by 160mm, standing the mixture for 24 hours, demolding the mixture, and curing the prepared cement block in a standard curing box for 28 days to obtain a cement sample.
The graph of the comparison of the compressive strength of the normal blast furnace granulated slag and the sludge-added granulated slag after 28 days of hydration is shown in FIG. 5. As can be seen from fig. 5, slag cement was prepared using two different types of blast furnace granulated slag: the comparison of the compressive strength of the blast furnace granulated slag cement prepared from the industrial blast furnace slag and the slag cement prepared from the granulated slag after 28 days of hydration is higher than the testing standard of the cement strength of 42.5 MPa.
Test example 3
The cement samples obtained in the embodiments 1-2 are prepared according to the method of the test example 2, then the cement samples are ground to be less than 0.074mm, and the Cr element leaching concentration is tested according to the national standard solid waste leaching toxicity leaching method (HJ 557-2010). The Cr leaching concentration of the cement slurry of the slag cement prepared by the invention after being hydrated for 28 days is 0.014mg/L which is far lower than the standard value of 0.2mg/L of Cr leaching in the sintered clinker specified in GB 30760-2014.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and amendments can be made without departing from the principle of the present invention, and these modifications and amendments should also be considered as the protection scope of the present invention.
Claims (5)
1. A method for treating stainless steel pickling sludge and preparing slag cement comprises the following steps:
mixing the stainless steel pickling sludge, the molten blast furnace slag and a modifier to obtain molten slag;
performing cold quenching on the molten slag to obtain granulated slag;
grinding the granulated slag to obtain slag powder;
mixing the slag powder and silicate cement clinker to obtain slag cement;
the modifier is fly ash;
the temperature of the molten blast furnace slag is 1400-1450 ℃;
the total amount of the stainless steel pickling sludge is 1-10 wt% of the molten blast furnace slag;
the mass ratio of the slag powder to the portland cement clinker is 40-50: 50-60;
the total addition amount of the modifier is 1-5 wt% of the molten blast furnace slag;
the stainless steel pickling sludge is pickling sludge generated by using sulfuric acid as a pickling medium in a stainless steel production enterprise; the stainless steel pickling sludge comprises CaSO 4 45~60wt%，Fe 2 O 3 20~35wt%，Cr 2 O 3 1~6wt%，SiO 2 2~3wt%。
2. The method of claim 1, wherein the stainless steel pickling sludge has a water content of less than 5 wt%.
3. The method according to claim 1, wherein the mixing time of the stainless steel pickling sludge, the molten blast furnace slag and the modifier is 3-10 min.
4. The method of claim 1, wherein the cooling rate of the cold quenching is 300 to 500 ℃/min.
5. The method according to claim 1, characterized in that the particle size of the slag powder is less than 0.1 mm; the specific surface area of the slag powder is 500m 2 More than kg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111215501.8A CN113968684B (en) | 2021-10-19 | 2021-10-19 | Method for treating stainless steel pickling sludge and preparing slag cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111215501.8A CN113968684B (en) | 2021-10-19 | 2021-10-19 | Method for treating stainless steel pickling sludge and preparing slag cement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113968684A CN113968684A (en) | 2022-01-25 |
| CN113968684B true CN113968684B (en) | 2022-08-19 |
Family
ID=79587642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111215501.8A Active CN113968684B (en) | 2021-10-19 | 2021-10-19 | Method for treating stainless steel pickling sludge and preparing slag cement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113968684B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115745528B (en) * | 2022-10-19 | 2023-08-29 | 浙江永坚新材料科技股份有限公司 | High-performance concrete for bridge thin-wall hollow pier in plateau area and preparation method thereof |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7141112B2 (en) * | 2003-01-31 | 2006-11-28 | Douglas C Comrie | Cementitious materials including stainless steel slag and geopolymers |
| CN101914639A (en) * | 2010-09-08 | 2010-12-15 | 北京科技大学 | Method for recycling iron on line from iron-containing industrial slag and preparing glass ceramics frit |
| CN106517834B (en) * | 2016-11-25 | 2019-04-16 | 江西理工大学 | A method of utilizing molten blast furnace slag high temperature harmless treatment stainless steel slag |
| CN109943726A (en) * | 2019-04-24 | 2019-06-28 | 北京科技大学 | A kind of method of the slag bath processing sludge of pickling containing Cr |
| CN110951972A (en) * | 2019-12-09 | 2020-04-03 | 上海宝田新型建材有限公司 | Method for reducing ironmaking and co-producing calcium-magnesium-aluminum-silicon product by using steel slag |
| CN112390549A (en) * | 2020-12-03 | 2021-02-23 | 广西鱼峰水泥股份有限公司 | Composite cement of stainless steel slag tailing mud and slag and preparation method thereof |
| CN113480123A (en) * | 2021-08-02 | 2021-10-08 | 江苏洁奥德工程技术有限公司 | Harmless treatment method for pickling sludge |
-
2021
- 2021-10-19 CN CN202111215501.8A patent/CN113968684B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113968684A (en) | 2022-01-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Mi et al. | Preparation of high-strength ceramsite from red mud, fly ash, and bentonite | |
| Zhao et al. | Solidification of heavy metals in lead smelting slag and development of cementitious materials | |
| Jiang et al. | Characteristics of steel slags and their use in cement and concrete—A review | |
| AU2020101154A4 (en) | A Cementitious Material, A Concrete Prepared And Its Preparation Method | |
| Hajjaji et al. | Composition and technological properties of geopolymers based on metakaolin and red mud | |
| CN110357548A (en) | A kind of full solid waste concrete of high-early-strength high-performance and preparation method thereof | |
| CN102585834B (en) | Solidifying agent for treating chromium-polluted soil | |
| CN109500046B (en) | Method for strengthening and curing chromium in chromium-containing waste | |
| CN108275974B (en) | Water permeable brick and method for preparing water permeable brick by using fly ash | |
| CN114292124A (en) | Ceramsite fired by fly ash and preparation method and application thereof | |
| CN110684537A (en) | Chromium-contaminated soil curing agent and application thereof | |
| CN112723831A (en) | Lead-zinc slag-based ecological cementing material for cementing and curing heavy metals and preparation method thereof | |
| CN110183120A (en) | Utilize the method for original state electrolytic manganese residues and steel slag tailing slurry production activity of cement admixture | |
| CN113968684B (en) | Method for treating stainless steel pickling sludge and preparing slag cement | |
| CN113929382A (en) | Full-solid waste aggregate ultrahigh-strength concrete and preparation method thereof | |
| Huo et al. | A clean approach for detoxification of industrial chromium-bearing stainless steel slag: Selective crystallization control and binary basicity effect | |
| CN113800941B (en) | Method for preparing ceramsite by utilizing chromium-contaminated soil and ceramsite | |
| CN107759176A (en) | The solid waste comprehensive utilization of slag powders makes building material | |
| Jian et al. | Preparation of lightweight aggregates using waste soil contaminated with heavy metals: physical properties, microstructure and verification of heavy metal solidification through different leaching tests | |
| CN113735467A (en) | Modified steel slag and preparation method and application thereof | |
| CN116803944A (en) | Concrete solid brick prepared by detoxication of waste incineration fly ash and preparation method thereof | |
| Chiang et al. | Iron and steel slags | |
| Yuan et al. | High-temperature modification of steel slag using composite modifier containing silicon calcium slag, fly ash, and reservoir sediment | |
| Sai et al. | The cementitious properties of alkali-activated municipal solid waste incineration fly ash-phosphorus slag-secondary aluminum dross matrix composites and the mechanism of solidification of heavy metals | |
| JP6292257B2 (en) | Hydrated solidified product using desulfurized slag |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |