CN113896494B - Ferronickel slag building material and preparation method thereof - Google Patents

Ferronickel slag building material and preparation method thereof Download PDF

Info

Publication number
CN113896494B
CN113896494B CN202111351909.8A CN202111351909A CN113896494B CN 113896494 B CN113896494 B CN 113896494B CN 202111351909 A CN202111351909 A CN 202111351909A CN 113896494 B CN113896494 B CN 113896494B
Authority
CN
China
Prior art keywords
parts
micro powder
temperature
slag
nickel
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
Application number
CN202111351909.8A
Other languages
Chinese (zh)
Other versions
CN113896494A (en
Inventor
吴联权
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN202111351909.8A priority Critical patent/CN113896494B/en
Publication of CN113896494A publication Critical patent/CN113896494A/en
Application granted granted Critical
Publication of CN113896494B publication Critical patent/CN113896494B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • C04B28/14—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
    • 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
    • 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
    • C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/02—Treatment
    • C04B20/023—Chemical treatment
    • 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
    • C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/02—Treatment
    • C04B20/026—Comminuting, e.g. by grinding or breaking; Defibrillating fibres other than asbestos
    • 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
    • C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/02—Treatment
    • C04B20/04—Heat treatment
    • 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
    • C04B7/14—Cements containing slag
    • C04B7/147—Metallurgical slag
    • C04B7/153—Mixtures thereof with other inorganic cementitious materials or other activators
    • C04B7/21—Mixtures thereof with other inorganic cementitious materials or other activators with calcium sulfate containing activators
    • 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 provides a ferronickel slag building material and a preparation method thereof, belonging to the technical field of metal smelting solid waste utilization, and comprising the following components in parts by weight: 40-60 parts of cement clinker, 1-25 parts of ferronickel slag micro powder, 2-8 parts of gypsum, 2-8 parts of phosphate and 0.1-10 parts of additive, wherein the ferronickel slag micro powder is prepared by using industrial ferronickel slag as a raw material through a grinding process, and the specific surface area of the ferronickel slag micro powder is 350-550m 2 A micropowder/kg; the invention improves the coagulation strength of the cement clinker by optimizing and adjusting the grinding grain diameter, the blending proportion and the composition structural characteristics of the ferronickel slag micro powder.

Description

Ferronickel slag building material and preparation method thereof
Technical Field
The invention relates to the technical field of metal smelting solid waste utilization, in particular to a ferronickel slag building material and a preparation method thereof.
Background
River sand is an important raw material for concrete and mortar as a natural resource. In recent years, the investment of infrastructure construction in China is increased, so that the demand of sandstone in the market is increased continuously, and the exploitation of natural resources causes damage to the environment, which is difficult to repair or cannot be repaired.
The ferronickel slag is industrial waste slag generated by water quenching and quenching after nickel and partial iron are extracted by reduction, along with the rapid development of stainless steel and special alloy industries in China, a large amount of ferronickel slag is obtained by smelting nickel alloy materials by utilizing loess nickel ore, the annual discharge amount of the ferronickel slag in China is over 3000 ten thousand tons in recent years, and the ferronickel slag becomes the fourth smelting slag after iron slag, steel slag and red mud in China, but the comprehensive utilization rate of ferronickel slag waste in China is low, and most ferronickel slag waste is stacked or buried in the open air, so that resources are wasted, a large amount of land is occupied, and the surrounding ecological environment is damaged. Therefore, the research of the comprehensive utilization of the ferronickel slag is vigorously carried out, and the research has great significance to the ferronickel industry in China and even the world.
The main component of the nickel-iron sand is SiO 2 MgO, CaO and Al 2 O 3 The research shows that the ferronickel slag has potential gelling activity, so that more and more researches begin to pay attention to the possibility of using the ferronickel slag as a cement admixture and a concrete mineral admixture, the Chinese architecture society also issues a group standard T/ASC01-2016 (ferronickel slag powder for cement and concrete) in 2016 (6 months), and specific technical indexes and requirements are provided for the use of the ferronickel slag powder in the cement and the concrete.
The early basic research finds that the nickel-iron sand added into the concrete can improve the strength of the concrete, so that the use efficiency of the concrete can be greatly improved, and the stability cannot be adversely affected, but the further application of the nickel-iron sand in the cementing material is limited by the defects that the nickel-iron slag has low pozzolanic activity, the early strength is low, the strength is slowly increased, the setting time is long and the like when the nickel-iron slag is directly used as a cement admixture.
Disclosure of Invention
Aiming at the problems, the invention provides a ferronickel slag building material and a preparation method thereof.
The purpose of the invention is realized by adopting the following technical scheme:
the ferronickel slag building material comprises the following components in parts by weight: 40-60 parts of cement clinker, 1-25 parts of ferronickel slag micro powder, 2-8 parts of gypsum, 2-8 parts of phosphate and 0.1-10 parts of additive, wherein the ferronickel slag micro powder is prepared by using industrial ferronickel slag as a raw material through a grinding process, and the specific surface area of the ferronickel slag micro powder is 350-550m 2 A/kg of micropowder.
Preferably, the composition comprises the following components in parts by weight: 55-60 parts of cement clinker, 18-20 parts of ferronickel slag micro powder, 4-5 parts of gypsum, 3-6 parts of phosphate and 2-5 parts of additive.
Preferably, the nickel-iron slag building material further comprises the following components in parts by weight: 90-100 parts of coarse aggregate and 80-90 parts of fine aggregate.
Preferably, the ferronickel slag micro powder is surface-modified ferronickel slag micro powder, and the preparation method comprises the following steps:
s1, crushing and grinding the industrial nickel-iron slag, adding activated carbon powder or coal dust according to the weight ratio of 1-2%, pressing and forming, drying, performing heat treatment in an atmosphere protection high-temperature electric furnace at the heat treatment temperature of 1000 ℃ and 1200 ℃, preserving heat for 1-2h, crushing and grinding again after self-cooling to room temperature, performing magnetic separation and deironing and screening in sequence to obtain the product with the specific surface area of 350 ℃ and 550m 2 A/kg of micropowder;
s2, adding the ferronickel slag micro powder subjected to iron reduction and iron removal into an alkaline silica sol solution under the stirring condition, wherein the material ratio of the mixed solution is 20-30mL/g, the concentration of the alkaline silica sol solution is 10-30%, the particle size is 10-50nm, the pH value is 9-10, stirring the mixed system under the vacuum degree condition of 0.07-0.08MPa for reaction for 2-4h, filtering out a precipitate after the reaction is finished, leaching the precipitate with an alkali solution and deionized water, the pH value of which is 9-12, and drying at 90-110 ℃ to obtain the surface modified ferronickel slag micro powder.
Preferably, the nickel-iron slag micro powder is high-temperature reconstructed nickel-iron slag micro powder, and the preparation method comprises the following steps:
a1, mixing the ferronickel slag micro powder subjected to reduction and iron removal with cement clinker and calcium fluoride, adding a small amount of ethanol as a binder, fully mixing uniformly, performing compression molding, and performing heat treatment in a high-temperature electric furnace, wherein the heat treatment procedure is as follows: keeping the temperature at 90-100 ℃ for 1-2 h; keeping the temperature at 500-600 ℃ for 2-3 h; heating to 1200-1300 ℃ within 200min, preserving the heat for 3h, and self-cooling to room temperature to prepare a high-temperature reconstructed product;
wherein the mixing weight part ratio of the ferronickel slag micro powder subjected to reduction and iron removal to the cement clinker and the calcium fluoride is (60-65): (30-35): (5-10);
a2, crushing and grinding the high-temperature restructured product to the specific surface area of no less than 350m 2 And/kg, preparing the ferronickel slag micro powder reconstructed at high temperature.
Preferably, the admixture comprises one or more of a water reducing agent, an early strength agent, a set adjusting agent, a binder, a pumping agent and a permeability-reducing agent.
Preferably, the additive comprises modified lithium salt slag micro powder, and the weight ratio of the modified lithium salt slag micro powder to the nickel iron slag micro powder is 1: (10-30).
Preferably, the preparation method of the modified lithium salt slag micro powder comprises the following steps:
b1, cleaning lithium salt slag, removing impurities, grinding into fine powder, adding fine powder of lime, and mixing, wherein the grinding fineness of the fine powder is not less than 150m 2 Kg, adding a small amount of water as a binder after mixing, fully and uniformly mixing, performing compression molding, and performing heat treatment in a high-temperature electric furnace, wherein the heat treatment procedure is as follows: keeping the temperature at 200 ℃ for 0.5-1h at 100-; keeping the temperature at 400 ℃ and 600 ℃ for 1-2 h; keeping the temperature at 1000 ℃ and 1200 ℃ for 2-3 h; keeping the temperature at 1450 ℃ for 1-2h, self-cooling to room temperature, and grinding the product to a specific surface area of no less than 350m 2 Per kg, obtaining a high-temperature activation product;
wherein the mixing weight part ratio of the lithium salt slag to the calcareous material is 20: (3-5);
b2, weighing trifluoropropyltrimethoxysilane, dissolving the trifluoropropyltrimethoxysilane in absolute ethanol to obtain a trifluoropropyltrimethoxysilane solution, wherein the weight ratio of the trifluoropropyltrimethoxysilane to the high-temperature activation product is 1: (200-250), spraying the trifluoropropyltrimethoxysilane solution in the high-temperature activated product, fully stirring and mixing, and evaporating the solvent to obtain the modified lithium salt slag micro powder.
Another aspect of the present invention is to provide a method for preparing the aforementioned ferrochromium slag building material, specifically, the method comprises the following steps:
(1) crushing and grinding industrial nickel-iron slag, adding activated carbon powder or pulverized bituminous coal according to the weight ratio of 1-2%, pressing and forming, drying, performing heat treatment in an atmosphere protection high-temperature electric furnace at the heat treatment temperature of 1000- 2 A/kg of micropowder;
(2) modification treatment of the nickel-iron slag micro powder, including surface modification or high-temperature reconstruction modification of the nickel-iron slag micro powder;
(3) and uniformly mixing the prepared nickel-iron slag micro powder with the cement clinker, the gypsum, the phosphate and the additive according to the weight part ratio to obtain the nickel-iron slag building material.
The invention has the beneficial effects that:
the coagulation strength of the cement clinker blended with the ferronickel slag is improved by optimizing and adjusting the grinding particle size, the mixing proportion and the composition structural characteristics of the ferronickel slag micro powder, and specifically, the mineral composition of the ferronickel slag comprises tricalcium silicate, dicalcium silicate, RO phase, dicalcium ferrite and the like, the ferronickel slag powder obtained after the ferronickel slag is subjected to early cooling pretreatment and grinding has certain pozzolanic activity, has potential conditions for being used as a concrete mineral admixture and a cement mixing material, can be used as a substitute powder material for a conventional admixture of concrete, but not only needs a very high powder mill but also needs a high mixing amount due to low activity of the admixture, but the ferronickel slag with high mixing amount is not beneficial to early strengthening of the concrete; the invention utilizes alkaline silica sol solution to carry out surface treatment on the nickel-iron slag micro powder, and improves the volcanic ash activity of the nickel-iron slag micro powder based on the excitation under alkaline condition and the surface modification of silicon dioxide. The lithium salt slag is subjected to modification treatment and is added into the building material as a coagulation regulating additive to further promote the early strength growth, specifically, the lithium salt slag and calcareous are subjected to mixing high-temperature treatment and then subjected to surface modification by using trifluoropropyltrimethoxysilane, and polyfluoro groups are introduced into the additive through a coupling reaction under a water-containing condition, so that the hydration of the cementing material can be promoted under a polar environment with strong trace fluorine, the coagulation time is shortened, and the early strength growth is promoted.
Detailed Description
The invention is further described with reference to the following examples.
Example 1
The embodiment relates to a ferronickel slag building material which comprises the following components in parts by weight: 55-60 parts of cement clinker, 18-20 parts of ferronickel slag micro powder, 4-5 parts of gypsum and 3-6 parts of phosphate, wherein the ferronickel slag micro powder is prepared by using industrial ferronickel slag as a raw material through a grinding process, and has a specific surface area of 350-550m 2 A micropowder/kg.
Example 2
The embodiment relates to a ferronickel sediment building material, with embodiment 1, the difference lies in: the early strength agent comprises an external early strength agent and a coagulant, and specifically comprises the following components in parts by weight: 55-60 parts of cement clinker, 18-20 parts of nickel iron slag micro powder, 4-5 parts of gypsum, 3-6 parts of phosphate, 1-3 parts of sodium sulfate composite early strength agent and 1-2 parts of aluminum oxide clinker coagulant, wherein the nickel iron slag micro powder takes industrial nickel iron slag as raw material, and the specific surface area of the nickel iron slag micro powder prepared through the grinding process is 350-550m 2 A/kg of micropowder.
Example 3
The embodiment relates to a ferronickel sediment building material, with embodiment 1, the difference lies in: the nickel iron slag micro powder is surface-modified nickel iron slag micro powder, and specifically comprises the following components in parts by weight: 55-60 parts of cement clinker, 18-20 parts of ferronickel slag micro powder, 4-5 parts of gypsum and 3-6 parts of phosphate, wherein the ferronickel slag micro powder takes industrial ferronickel slag as a raw material, and the specific surface area of the ferronickel slag micro powder prepared through a grinding process is 350-550m 2 A/kg of micropowder;
the preparation method of the surface modified ferronickel slag micro powder comprises the following steps:
s1, crushing and grinding the industrial nickel-iron slag, adding activated carbon powder or coal dust according to the weight ratio of 1-2%, pressing and forming, drying, performing heat treatment in an atmosphere protection high-temperature electric furnace at the heat treatment temperature of 1000 ℃ and 1200 ℃, preserving heat for 1-2h, crushing and grinding again after self-cooling to room temperature, performing magnetic separation and deironing and screening in sequence to obtain the product with the specific surface area of 350 ℃ and 550m 2 A/kg of micropowder;
s2, adding the nickel-iron slag micro powder subjected to reduction and iron removal into an alkaline silica sol solution under the stirring condition, wherein the material ratio of the mixed solution is 20-30mL/g, the concentration of the alkaline silica sol solution is 10-30%, the particle size is 10-50nm, the pH value is 9-10, stirring the mixed system under the vacuum condition of 0.07-0.08MPa for reaction for 2-4h, filtering out a precipitate after the reaction is finished, leaching the precipitate with an alkaline solution with the pH value of 9-12 and deionized water in sequence, and drying at 90-110 ℃ to obtain the surface modified nickel-iron slag micro powder.
Example 4
The embodiment relates to a ferronickel sediment building material, with embodiment 1, the difference lies in: the nickel-iron slag micro powder is prepared by high-temperature reconstruction, and specifically comprises the following components in parts by weight: 55-60 parts of cement clinker, 18-20 parts of ferronickel slag micro powder, 4-5 parts of gypsum and 3-6 parts of phosphate, wherein the ferronickel slag micro powder takes industrial ferronickel slag as a raw material, and the specific surface area of the ferronickel slag micro powder prepared through a grinding process is 350-550m 2 A/kg of micropowder;
the preparation method of the ferronickel slag micro powder subjected to high-temperature reconstruction comprises the following steps:
a1, mixing the ferronickel slag micro powder subjected to reduction and iron removal with cement clinker and calcium fluoride, adding a small amount of ethanol as a binder, fully mixing uniformly, performing compression molding, and performing heat treatment in a high-temperature electric furnace, wherein the heat treatment procedure is as follows: keeping the temperature at 90-100 ℃ for 1-2 h; keeping the temperature at 500-; heating to 1200-1300 ℃ within 200min, preserving the heat for 3h, and self-cooling to room temperature to prepare a high-temperature reconstructed product;
wherein the mixing weight part ratio of the ferronickel slag micro powder subjected to reduction and iron removal to the cement clinker and the calcium fluoride is 65: 30: 8;
a2, crushing and grinding the high-temperature restructured product to the specific surface area of no less than 350m 2 And/kg, preparing the ferronickel slag micro powder reconstructed at high temperature.
Example 5
The embodiment relates to a ferronickel slag building material, which is different from embodiment 1 in that the ferronickel slag building material comprises an additive, and specifically comprises the following components in parts by weight: 55-60 parts of cement clinker, 18-20 parts of ferronickel slag micro powder, 4-5 parts of gypsum, 3-6 parts of phosphate and 1-1.5 parts of additive, wherein the ferronickel slag micro powder takes industrial ferronickel slag as raw material, and the specific surface area of the ferronickel slag micro powder is 350-550m 2 A/kg of micropowder;
the additive is modified lithium salt slag micro powder, and the preparation method comprises the following steps:
b1, cleaning lithium salt slag, removing impurities, grinding into fine powder, adding fine powder of lime, and mixing, wherein the grinding fineness of the fine powder is not less than 150m 2 Kg, adding a small amount of water as a binder after mixing, fully and uniformly mixing, performing compression molding, and performing heat treatment in a high-temperature electric furnace, wherein the heat treatment procedure is as follows: keeping the temperature at 200 ℃ for 0.5-1h at 100-; keeping the temperature at 400 ℃ and 600 ℃ for 1-2 h; keeping the temperature at 1000 ℃ and 1200 ℃ for 2-3 h; keeping the temperature at 1450 ℃ for 1-2h, self-cooling to room temperature, and grinding the product to a specific surface area of not less than 350m 2 Per kg, obtaining a high temperature activation product;
wherein the mixing weight part ratio of the lithium salt slag to the calcareous material is 4: 1;
b2, weighing trifluoropropyltrimethoxysilane and dissolving the trifluoropropyltrimethoxysilane in absolute ethyl alcohol to obtain a trifluoropropyltrimethoxysilane solution, wherein the weight ratio of the trifluoropropyltrimethoxysilane to the high-temperature activation product is 1: 200, spraying the trifluoropropyltrimethoxysilane solution in the high-temperature activated product, fully stirring and mixing, and evaporating the solvent to obtain the modified lithium salt slag micro powder.
Initial setting time and final setting time are measured by referring to a GB/T1346-1989 method, mechanical strength (flexural strength and compressive strength) of 3d, 7d and 28d are measured by referring to a GB/T17671-2020 method, and the measurement results are as follows by taking cement paste as comparison:
Figure BDA0003356104860000061
finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims (5)

1. The ferronickel slag building material is characterized by comprising the following components in parts by weight: 40-60 parts of cement clinker, 1-25 parts of nickel-iron slag micro powder, 2-8 parts of gypsum, 2-8 parts of phosphate and 0.1-10 parts of additive, wherein the nickel-iron slag micro powder is micro powder with the specific surface area of 350-550m2/kg, which is prepared by using industrial nickel-iron slag as a raw material through a grinding process;
the preparation method of the nickel-iron slag micro powder comprises the following steps:
s1, crushing and grinding the industrial nickel-iron slag, adding activated carbon powder or pulverized bituminous coal according to the weight ratio of 1-2%, drying after compression molding, performing heat treatment in an atmosphere protection high-temperature electric furnace at the heat treatment temperature of 1000 ℃ plus 1200 ℃, preserving heat for 1-2h, performing crushing and grinding again after self-cooling to room temperature, and sequentially performing magnetic separation for removing iron and screening to obtain micro powder with the specific surface area of 350 plus 550m 2/kg;
s2, adding the ferronickel slag micro powder subjected to iron reduction and iron removal into an alkaline silica sol solution under the stirring condition, wherein the material ratio of the mixed solution is 20-30mL/g, the concentration of the alkaline silica sol solution is 10-30%, the particle size is 10-50nm, the pH value is 9-10, stirring the mixed system under the vacuum degree condition of 0.07-0.08MPa for reaction for 2-4h, filtering out a precipitate after the reaction is finished, leaching the precipitate by sequentially using an alkali solution with the pH value of 9-12 and deionized water, and drying at 90-110 ℃ to obtain the surface modified ferronickel slag micro powder;
the additive comprises modified lithium salt slag micro powder, and the weight ratio of the modified lithium salt slag micro powder to the nickel iron slag micro powder is 1: (10-30);
the preparation method of the modified lithium salt slag micro powder comprises the following steps:
b1 cleaning lithium salt slag, removing impurities, grinding the lithium salt slag into fine powder, adding fine powder of lime, mixing, adding a small amount of water serving as a binder after mixing, fully and uniformly mixing, performing compression molding, performing heat treatment in a high-temperature electric furnace, wherein the heat treatment procedure is as follows: keeping the temperature at 200 ℃ for 0.5-1h at 100-; keeping the temperature at 400-600 ℃ for 1-2 h; keeping the temperature at 1000-1200 ℃ for 2-3 h; keeping the temperature at 1450 ℃ for 1-2h, self-cooling to room temperature, and grinding the product to a specific surface area not less than 350m2/kg to obtain a high-temperature activated product;
wherein the mixing weight part ratio of the lithium salt slag to the calcareous material is 20: (3-5);
b2, weighing trifluoropropyltrimethoxysilane and dissolving the trifluoropropyltrimethoxysilane in absolute ethyl alcohol to obtain a trifluoropropyltrimethoxysilane solution, wherein the weight ratio of the trifluoropropyltrimethoxysilane to the high-temperature activation product is 1: (200-250), spraying the trifluoropropyltrimethoxysilane solution in the high-temperature activated product, fully stirring and mixing, and evaporating the solvent to obtain the modified lithium salt slag micro powder.
2. The ferronickel slag building material of claim 1, which comprises the following components in parts by weight: 55-60 parts of cement clinker, 18-20 parts of ferronickel slag micro powder, 4-5 parts of gypsum, 3-6 parts of phosphate and 2-5 parts of additive.
3. The ferronickel slag building material of claim 1, further comprising, in parts by weight: 90-100 parts of coarse aggregate and 80-90 parts of fine aggregate.
4. The ferronickel slag building material of claim 1, wherein the admixture comprises one or more of a water reducing agent, an early strength agent, a set control agent, a binder, a pumping agent, and a permeability reducing agent.
5. A method for preparing ferronickel slag building material according to one of claims 1 to 4, characterized by comprising the steps of:
(1) crushing and grinding industrial nickel-iron slag, adding activated carbon powder or pulverized bituminous coal according to the weight ratio of 1-2%, pressing and forming, drying, performing heat treatment in an atmosphere protection high-temperature electric furnace at the heat treatment temperature of 1000-;
(2) modification treatment of the nickel-iron slag micro powder, including surface modification of the nickel-iron slag micro powder;
(3) and uniformly mixing the prepared nickel-iron slag micro powder with the cement clinker, the gypsum, the phosphate and the additive according to the weight part ratio to obtain the nickel-iron slag building material.
CN202111351909.8A 2021-11-16 2021-11-16 Ferronickel slag building material and preparation method thereof Active CN113896494B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111351909.8A CN113896494B (en) 2021-11-16 2021-11-16 Ferronickel slag building material and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111351909.8A CN113896494B (en) 2021-11-16 2021-11-16 Ferronickel slag building material and preparation method thereof

Publications (2)

Publication Number Publication Date
CN113896494A CN113896494A (en) 2022-01-07
CN113896494B true CN113896494B (en) 2022-09-06

Family

ID=79194380

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111351909.8A Active CN113896494B (en) 2021-11-16 2021-11-16 Ferronickel slag building material and preparation method thereof

Country Status (1)

Country Link
CN (1) CN113896494B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117383888B (en) * 2023-11-03 2024-05-07 宿迁市政大建材有限公司 Nickel slag aggregate concrete manufacturing method

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101680348B1 (en) * 2015-01-30 2016-11-29 건설자원기술단 주식회사 Pile grouting materials
CN106477925B (en) * 2016-10-21 2018-11-13 宝辰永宇（滁州）新材料科技有限公司 A kind of cement with little clinker and preparation method thereof
CN106893875B (en) * 2017-03-16 2018-09-18 辽宁科技大学 A method of handling lateritic nickel ore using direct-reduction magnetic separation
CN108218269B (en) * 2018-01-22 2020-05-12 河海大学 Nickel iron slag cementing material and preparation process thereof
CN108585573B (en) * 2018-05-15 2020-09-08 北京建筑材料科学研究总院有限公司 Preparation method of composite active admixture for concrete
CN110105041A (en) * 2019-05-23 2019-08-09 上海日兆建设工程有限公司 A kind of inorganic modified non-ignitable insulation board of graphite polystyrene and preparation method thereof
CN111072295A (en) * 2019-12-17 2020-04-28 福建源鑫环保科技有限公司 High-activity composite ferronickel slag cementing material and preparation method thereof
CN110981233B (en) * 2019-12-19 2021-12-24 安徽海螺新材料科技有限公司 Ferronickel slag masonry cement and preparation method thereof

Also Published As

Publication number Publication date
CN113896494A (en) 2022-01-07

Similar Documents

Publication Publication Date Title
CN110041028A (en) A kind of regeneration concrete and preparation method thereof using building waste
CN112723843B (en) Preparation method of weak-base-excited nickel slag high-strength concrete
CN108483953A (en) A kind of low hydration heat copper ashes base composite gelled material and preparation method thereof
CN110799472B (en) Concrete composition and method for producing same
CN113372029B (en) Low-carbon type super-sulfate cement, preparation method thereof and cement mortar
CN114394772A (en) Ecological cementing material and preparation method thereof
CN111320400A (en) Method for preparing high-gelling-activity steel slag by high-temperature reconstruction of calcium-aluminum components and application
Wang et al. Study on the preparation of high performance concrete using steel slag and iron ore tail-ings
CN113860781A (en) Industrial solid waste admixture for ultra-high performance concrete and preparation method thereof
CN113896494B (en) Ferronickel slag building material and preparation method thereof
CN114988741A (en) Lithium salt-based composite mineral admixture and preparation method thereof
CN116023098A (en) Low-carbon high-durability concrete
CN114230208A (en) High-strength cement and preparation method thereof
CN110981233B (en) Ferronickel slag masonry cement and preparation method thereof
CN110255943B (en) Wet-grinding barium slag admixture and preparation method and application thereof
CN115286286B (en) Efficient water reducing agent for concrete and preparation method thereof
CN115368037B (en) Heat-resistant concrete cementing material and preparation method and application thereof
CN114620964B (en) Method for preparing tailings and micro-aggregate and simultaneously producing magnetite
CN114292081B (en) Cement-free low-carbon concrete and preparation method thereof
CN114315195B (en) Preparation method of single-component early-strength rapid-setting geopolymer
CN114149187B (en) Preparation method of modified phosphogypsum-based reinforced and toughened cementing material
CN114230219B (en) Preparation method and application of steel slag composite excitant
CN113998960B (en) Modified micro-nano composite superfine admixture high-durability anti-crack concrete and preparation method thereof
CN111978057A (en) Early-strength high-strength composite cementing material and preparation method thereof
CN111470789A (en) Method for improving utilization efficiency of gypsum in sulphoaluminate cement

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