CN110963775A - Nickel slag gypsum mortar and preparation method and application thereof - Google Patents
Nickel slag gypsum mortar and preparation method and application thereof Download PDFInfo
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- CN110963775A CN110963775A CN201911221294.XA CN201911221294A CN110963775A CN 110963775 A CN110963775 A CN 110963775A CN 201911221294 A CN201911221294 A CN 201911221294A CN 110963775 A CN110963775 A CN 110963775A
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- gypsum
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- 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
- C04B28/14—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 calcium sulfate cements
- C04B28/145—Calcium sulfate hemi-hydrate with a specific crystal form
- C04B28/146—Calcium sulfate hemi-hydrate with a specific crystal form alpha-hemihydrate
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
- C04B18/144—Slags from the production of specific metals other than iron or of specific alloys, e.g. ferrochrome slags
-
- 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
- C04B28/14—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 calcium sulfate cements
- C04B28/145—Calcium sulfate hemi-hydrate with a specific crystal form
- C04B28/147—Calcium sulfate hemi-hydrate with a specific crystal form beta-hemihydrate
-
- 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
- C04B2111/00017—Aspects relating to the protection of the environment
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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
Abstract
The invention discloses nickel slag gypsum mortar and a preparation method and application thereof, belonging to the field of solid waste resource recycling, wherein the mortar comprises the following components in parts by mass: 60-80 parts of gypsum powder, 10-20 parts of nickel slag, 7-8 parts of cement, 0.2-0.6 part of water-retaining agent, 0.2-0.6 part of gypsum retarder, 0.3-0.8 part of water reducing agent and 60-70 parts of water, wherein the nickel slag in industrial discharged waste is crushed to replace fine aggregate river sand of the gypsum mortar, so that the compactness and strength of the gypsum mortar are effectively improved, the exploitation of natural sand stones is saved, and the damage to the environment is reduced; the nickel slag gypsum mortar prepared by the invention has good performance, can be used as masonry mortar, plastering mortar, ground mortar and the like, meets the national requirements of energy conservation and environmental protection, and is simple in preparation method and beneficial to popularization and application.
Description
Technical Field
The invention relates to the field of recycling of solid waste resources, in particular to nickel slag gypsum mortar and a preparation method and application thereof.
Background
The annual discharge amount of industrial byproduct gypsum in China reaches over hundred million tons, most of the industrial byproduct gypsum is piled outside all the year round, a large amount of land is occupied, and the surrounding environment is polluted.
The nickel slag is FeO and SiO formed in the smelting process of nickel metal2、Al2O3And MgO and the like, which are used as the main chemical compositions, are naturally discharged or quenched by water to form industrial waste slag, and belongs to industrial solid waste discharged by smelting metal. According to relevant statistics, the annual emission amount of the nickel slag is about 3000 ten thousand tons, the total resource utilization rate is only 8% -15%, most of the nickel slag is buried or stacked in the open air, a large amount of land is occupied, the surrounding ecological environment is damaged, and the volcanic ash in the early hydration stage of the nickel slag is low in activity and utilization rate.
The Chinese patent with the application number of 201810276142.9 discloses high-strength gypsum-based self-leveling mortar which is prepared by mixing gypsum and ore sand to improve the strength of the gypsum-based self-leveling mortar; the Chinese patent with application number 201610691342.1 discloses a method for toughening gypsum by using nickel slag and a preparation method thereof, wherein the method comprises the steps of mixing and grinding raw materials such as nickel slag, industrial gypsum and the like to enhance the toughness of the gypsum; the Chinese patent with the application number of 201710786606.6 discloses nickel slag pervious concrete and a preparation method thereof, and the nickel slag pervious concrete is prepared by taking nickel slag as main aggregate. However, the prior art still has the defects and shortcomings that the nickel slag has high strength, is ground into powder, consumes too much energy and has low utilization rate, and the nickel slag contains free MgO and can react with cement components to generate Mg (OH)2When the hydration products are generated, the volume is increased, the mortar structure is locally expanded, and the cracking and the strength reduction of the whole structure can be further caused.
Disclosure of Invention
The invention aims to provide nickel slag gypsum mortar and a preparation method and application thereof, which aim to solve the problems in the prior art, and utilize the characteristic of high hardness of nickel slag to replace fine aggregate river sand of the gypsum mortar, thereby effectively improving the compactness and strength of the gypsum mortar; the used nickel slag is obtained by crushing industrial solid waste slag until the granularity is less than or equal to 3mm and the specific surface area is more than 3500cm2G, without grindingGrinding into powder, thereby greatly reducing energy consumption; the activity of free MgO contained in the nickel slag is lower in a weak acid or weak alkaline gypsum system, thereby greatly reducing Mg (OH)2And the generation of hydration products improves the local expansion of the mortar structure.
Not only can solve the problem of nickel slag treatment, but also can generate good economic benefit.
In order to achieve the purpose, the invention provides the following scheme:
the invention aims to provide nickel slag gypsum mortar which comprises the following components in parts by mass:
60-80 parts of gypsum powder, 10-20 parts of nickel slag, 7-8 parts of cement, 0.2-0.6 part of water-retaining agent, 0.2-0.6 part of gypsum retarder, 0.3-0.8 part of water reducing agent and 60-70 parts of water;
further, the gypsum powder is α -hemihydrate gypsum powder or β -hemihydrate gypsum powder, and the specific surface area of the gypsum powder is 300-400m2/kg；
Further, the cement is one of ordinary portland cement or portland cement;
further, the ordinary portland cement is PO 42.5; the Portland cement is PII 52.5;
further, the water reducing agent is a polycarboxylic acid water reducing agent;
further, the water-retaining agent is hydroxypropyl methyl cellulose ether, and the viscosity is 60000-100000 mpa.s;
further, the gypsum retarder is one of a vegetable protein gypsum retarder or citric acid.
The invention also aims to provide a preparation method of the nickel slag gypsum mortar, which comprises the following steps:
(1) crushing the primary nickel slag product to a particle size of less than or equal to 3mm and a specific surface area of more than 3500cm2Obtaining nickel slag for later use;
(2) putting the gypsum powder, the cement, the water-retaining agent, the gypsum retarder and the water reducing agent into a mortar stirrer, mixing and stirring for 5-15 minutes at the rotating speed of 60-80 revolutions per minute, then adding the nickel slag and the water, and continuously mixing and stirring for 5-15 minutes to obtain nickel slag gypsum mortar;
in the step (1), the primary nickel slag product is industrial solid waste slag.
The invention also aims to provide application of the nickel slag gypsum mortar in building materials.
The invention discloses the following technical effects:
the nickel slag is difficult to be utilized as industrial discharge waste, and the nickel slag can be used for replacing natural sandstone, so that the exploitation of the natural sandstone can be saved, and the damage to the environment can be reduced; after the nickel slag is crushed, the surface of the crushed nickel slag is smooth and compact, the water absorption capacity is small, and the fluidity, compactness and strength of the mortar can be improved; the used nickel slag is obtained by crushing industrial solid waste slag until the granularity is less than or equal to 3mm and the specific surface area is more than 3500cm2The raw materials are not required to be ground into powder, so that the energy consumption is greatly reduced; because the pH of the gypsum system is usually in the range of 5-9, and the free MgO contained in the nickel slag has lower activity in the weak acid or weak alkaline gypsum system, the Mg (OH) is greatly reduced2And the generation of hydration products improves the local expansion of the mortar structure. Meanwhile, the nickel slag has high content of metallic iron, and the phase contains a large amount of iron forsterite, so that the hardness of the nickel slag is improved, river sand is replaced by the nickel slag to be doped into gypsum mortar, the wear resistance of the gypsum mortar can be obviously improved, the strength, the setting time and the water retention rate of the prepared nickel slag gypsum mortar meet the requirements of GB/T28627-2012 gypsum mortar, the performances such as impermeability, cohesiveness and cracking resistance are good, the nickel slag gypsum mortar can be used as masonry mortar, plastering mortar, ground mortar and the like, and the nickel slag gypsum mortar has the characteristics of stable quality, simple construction and the like, conforms to the national industrial policies of energy conservation, emission reduction and environmental protection, and is favorable for popularization and application.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is an XRD pattern of nickel slag.
Detailed Description
Reference will now be made in detail to various exemplary embodiments of the invention, the detailed description should not be construed as limiting the invention but as a more detailed description of certain aspects, features and embodiments of the invention.
It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Further, for numerical ranges in this disclosure, it is understood that each intervening value, between the upper and lower limit of that range, is also specifically disclosed. Every smaller range between any stated value or intervening value in a stated range and any other stated or intervening value in a stated range is encompassed within the invention. The upper and lower limits of these smaller ranges may independently be included or excluded in the range.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference herein for the purpose of disclosing and describing the methods and/or materials associated with the documents. In case of conflict with any incorporated document, the present specification will control.
It will be apparent to those skilled in the art that various modifications and variations can be made in the specific embodiments of the present disclosure without departing from the scope or spirit of the disclosure. Other embodiments will be apparent to those skilled in the art from consideration of the specification. The specification and examples are exemplary only.
As used herein, the terms "comprising," "including," "having," "containing," and the like are open-ended terms that mean including, but not limited to.
The "parts" in the present invention are all parts by mass unless otherwise specified.
The nickel slag gypsum mortar comprises the following components in parts by mass:
60-80 parts of gypsum powder, 10-20 parts of nickel slag, 7-8 parts of cement, 0.2-0.6 part of water-retaining agent, 0.2-0.6 part of gypsum retarder, 0.3-0.8 part of water reducing agent and 60-70 parts of water;
the gypsum powder is α -hemihydrate gypsum powder or β -hemihydrate gypsum powder;
the specific surface area of the gypsum powder is 300-400m2/kg；
The cement is one of ordinary portland cement or portland cement, such as PO42.5 or PII 52.5;
the water reducing agent is a polycarboxylic acid water reducing agent, such as a PC-1016 type polycarboxylic acid powder water reducing agent or an HY type polycarboxylic acid powder water reducing agent;
the water retaining agent is hydroxypropyl methyl cellulose ether, and the viscosity is 60000-100000 mpa.s;
the gypsum retarder is one of vegetable protein gypsum retarder or citric acid, such as DH-C gypsum retarder.
Example 1
The basic performance of the nickel slag and the river sand for construction are compared, and the comparison result is shown in table 1.
TABLE 1 comparison of basic Properties of Nickel slag with river Sand
As can be seen from Table 1, the nickel slag basically meets the standard requirements of the building sand in all aspects.
Example 2
The nickel slag is subjected to XRD characterization, an XRD spectrum is shown in figure 1, and the main chemical components of the obtained nickel slag are shown in Table 2.
TABLE 2 main chemical composition of nickel slag (w/%)
Example 3
The nickel slag gypsum mortar comprises the following components in parts by weight of gypsum powder (α -hemihydrate gypsum powder with the specific surface area of 300m 280 parts of nickel slag, 10 parts of nickel slag, 7 parts of cement (PII 52.5 cement), 0.45 part of water-retaining agent (hydroxypropyl methyl cellulose ether with the viscosity of 60000mpa.s), 0.6 part of gypsum retarder (DH-C gypsum retarder), 0.3 part of PC-1016 type polycarboxylic acid powder water reducing agent and 65 parts of water.
The preparation method of the nickel slag gypsum mortar comprises the following steps:
(1) crushing the primary nickel slag product to a particle size of less than or equal to 3mm and a specific surface area of more than 3500cm2Obtaining nickel slag for later use;
(2) and putting the gypsum powder, the cement, the water-retaining agent, the gypsum retarder and the water reducing agent into a mortar stirrer, mixing and stirring for 5 minutes at the rotating speed of 60 revolutions per minute, then adding the nickel slag and the water, and continuously mixing and stirring for 12 minutes to obtain the nickel slag gypsum mortar.
Example 4
The nickel slag gypsum mortar comprises the following components in parts by weight of gypsum powder (β -hemihydrate gypsum powder with the specific surface area of 320m265 parts/kg), 15 parts of nickel slag, 7.4 parts of cement (PII 52.5 cement), 0.6 part of water-retaining agent (hydroxypropyl methyl cellulose ether, viscosity is 80000mpa.s), 0.4 part of gypsum retarder (DH-C gypsum retarder), 0.6 part of HY polycarboxylic acid powder water reducer and 60 parts of water.
The preparation method of the nickel slag gypsum mortar comprises the following steps:
(1) crushing the primary nickel slag product to a particle size of less than or equal to 3mm and a specific surface area of more than 3500cm2Obtaining nickel slag for later use;
(2) and putting the gypsum powder, the cement, the water-retaining agent, the gypsum retarder and the water reducing agent into a mortar stirrer, mixing and stirring for 10 minutes at the rotating speed of 65 revolutions per minute, then adding the nickel slag and the water, and continuously mixing and stirring for 5 minutes to obtain the nickel slag gypsum mortar.
Example 5
The nickel slag gypsum mortar comprises the following components in parts by weight of gypsum powder (α -hemihydrate gypsum powder with the specific surface area of 340m 260 portions/kg), 18 portions of nickel slag, 7.1 portions of cement (PII 52.5 cement), 0.5 portion of water retention agent (hydroxypropyl methyl cellulose ether, viscosity is 70000mpa.s),0.2 part of gypsum retarder (citric acid), 0.8 part of PC-1016 type polycarboxylic acid powder water reducing agent and 68 parts of water.
The preparation method of the nickel slag gypsum mortar comprises the following steps:
(1) crushing the primary nickel slag product to a particle size of less than or equal to 3mm and a specific surface area of more than 3500cm2Obtaining nickel slag for later use;
(2) and putting the gypsum powder, the cement, the water-retaining agent, the gypsum retarder and the water reducing agent into a mortar stirrer, mixing and stirring for 15 minutes at the rotating speed of 70 r/min, then adding the nickel slag and the water, and continuously mixing and stirring for 10 minutes to obtain the nickel slag gypsum mortar.
Example 6
The nickel slag gypsum mortar comprises the following components in parts by weight of gypsum powder (β -hemihydrate gypsum powder with the specific surface area of 360m273 parts per kg), 20 parts of nickel slag, 7.2 parts of cement (PII 52.5 cement), 0.2 part of water-retaining agent (hydroxypropyl methyl cellulose ether with the viscosity of 100000mpa.s), 0.4 part of gypsum retarder (DH-C gypsum retarder), 0.44 part of PC-1016 type polycarboxylic acid powder water reducing agent and 70 parts of water.
The preparation method of the nickel slag gypsum mortar comprises the following steps:
(1) crushing the primary nickel slag product to a particle size of less than or equal to 3mm and a specific surface area of more than 3500cm2Obtaining nickel slag for later use;
(2) and putting the gypsum powder, the cement, the water-retaining agent, the gypsum retarder and the water reducing agent into a mortar stirrer, mixing and stirring for 15 minutes at the rotating speed of 80 r/min, then adding the nickel slag and the water, and continuously mixing and stirring for 5 minutes to obtain the nickel slag gypsum mortar.
Example 7
The nickel slag gypsum mortar comprises the following components in parts by weight of gypsum powder (β -hemihydrate gypsum powder with the specific surface area of 400m268 parts of nickel slag, 12 parts of nickel slag, 8 parts of cement (PO42.5 cement), 0.3 part of water-retaining agent (hydroxypropyl methyl cellulose ether with the viscosity of 100000mpa.s), 0.3 part of gypsum retarder (citric acid), 0.45 part of PC-1016 type polycarboxylic acid powder water reducing agent and 63 parts of water.
The preparation method of the nickel slag gypsum mortar comprises the following steps:
(1) crushing the primary nickel slag product to a specific surface with a granularity of less than or equal to 3mmThe product is more than 3500cm2Obtaining nickel slag for later use;
(2) and putting the gypsum powder, the cement, the water-retaining agent, the gypsum retarder and the water reducing agent into a mortar stirrer, mixing and stirring for 5 minutes at the rotating speed of 70 r/min, then adding the nickel slag and the water, and continuously mixing and stirring for 15 minutes to obtain the nickel slag gypsum mortar.
Comparative example 1
The nickel slag in example 3 was replaced with river sand, and the other components and preparation method were the same as in example 3.
The gypsum mortars prepared in examples 3 to 7 and comparative example 1 were subjected to performance analysis in accordance with GB/T28627-2012, and the results are shown in Table 4.
TABLE 4
The gypsum mortars prepared in examples 3 to 7 and comparative example 1 were analyzed for wear resistance according to "technical Standard for free-flowing floor engineering", and the results are shown in Table 5.
TABLE 5
| Item | Index (I) | Example 3 | Example 4 | Example 5 | Example 6 | Example 7 | Comparative example 1 |
| Wear resistance | ≤0.6mm | 0.51 | 0.47 | 0.43 | 0.41 | 0.49 | 0.54 |
The gypsum mortar samples prepared in examples 3-7 and comparative example 1 were subjected to expansion ratio performance testing, the samples were maintained in a standard curing room, cured at 20 + -1 deg.C and 60% humidity for 24 hours, demolded, wrapped with a preservative film after demolded, and then maintained in a constant temperature (20 + -3 deg.C) room for 30 days, and the results of the expansion performance testing were shown in Table 6.
TABLE 6
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (9)
1. The nickel slag gypsum mortar is characterized by comprising the following components in parts by mass:
60-80 parts of gypsum powder, 10-20 parts of nickel slag, 7-8 parts of cement, 0.2-0.6 part of water-retaining agent, 0.2-0.6 part of gypsum retarder, 0.3-0.8 part of water reducing agent and 60-70 parts of water.
2. The nickel slag gypsum mortar as claimed in claim 1, wherein the gypsum powder is one of α -hemihydrate gypsum powder or β -hemihydrate gypsum powder, and the specific surface area of the gypsum powder is 300-400m2/kg。
3. The nickel slag gypsum mortar of claim 1, wherein the cement is one of ordinary portland cement or portland cement.
4. The nickel slag gypsum mortar of claim 3, wherein the Portland cement is PO 42.5; the Portland cement is PII 52.5.
5. The nickel slag gypsum mortar of claim 1, wherein the water reducing agent is a polycarboxylic acid water reducing agent.
6. The nickel slag gypsum mortar of claim 1, wherein the water retention agent is hydroxypropyl methyl cellulose ether with a viscosity of 60000-100000 mpa.s.
7. The nickel slag gypsum mortar of claim 1, wherein the gypsum retarder is one of a vegetable protein gypsum retarder or citric acid.
8. A method for preparing the nickel slag gypsum mortar of any one of claims 1 to 7, comprising the steps of:
(1) crushing the primary nickel slag product to a particle size of less than or equal to 3mm and a specific surface area of more than 3500cm2Obtaining nickel slag for later use;
(2) putting the gypsum powder, the cement, the water-retaining agent, the gypsum retarder and the water reducing agent into a mortar stirrer, mixing and stirring for 5-15 minutes at the rotating speed of 60-80 revolutions per minute, then adding the nickel slag and the water, and continuously mixing and stirring for 5-15 minutes to obtain nickel slag gypsum mortar;
in the step (1), the primary nickel slag product is industrial solid waste slag.
9. Use of the nickel slag gypsum mortar of any one of claims 1 to 7 in building materials.
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| CN113998975A (en) * | 2021-11-25 | 2022-02-01 | 南京工业大学 | Gypsum-based ceramic tile cementing material and preparation method thereof |
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Application publication date: 20200407 |