CN116143541A - Artificial vesuvianite porous material prepared from iron tailings and preparation method thereof - Google Patents

Artificial vesuvianite porous material prepared from iron tailings and preparation method thereof Download PDF

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CN116143541A
CN116143541A CN202211601355.7A CN202211601355A CN116143541A CN 116143541 A CN116143541 A CN 116143541A CN 202211601355 A CN202211601355 A CN 202211601355A CN 116143541 A CN116143541 A CN 116143541A
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artificial
vesuvianite
iron
porous material
water
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陈乐�
林永权
张琴琴
司鹤洋
胡锦波
李超
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China Resources Cement Technology R&D Co Ltd
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China Resources Cement Technology R&D Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/04Portland cements
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    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00017Aspects relating to the protection of the environment
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00241Physical properties of the materials not provided for elsewhere in C04B2111/00
    • C04B2111/00258Electromagnetic wave absorbing or shielding materials
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20Resistance against chemical, physical or biological attack
    • C04B2111/27Water resistance, i.e. waterproof or water-repellent materials
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    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/40Porous or lightweight materials
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    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
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    • C04B2111/82Coloured materials
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    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/20Mortars, concrete or artificial stone characterised by specific physical values for the density
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    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/30Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
    • C04B2201/32Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
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    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

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Abstract

The invention provides an artificial vesuvianite porous material prepared from iron tailings and a preparation method thereof, belonging to the technical field of comprehensive utilization of solid waste of tailings and artificial stone, and the artificial vesuvianite porous material comprises the steps of firstly carrying out alkali excitation and mechanical activation on the solid waste of iron tailings to obtain solid waste of iron tailings with alkali excitation activity, then placing the solid waste of iron tailings, cement, retarder and inorganic mineral pigment in a stirring container, and uniformly stirring to obtain a dry powder mixture; respectively dissolving a water reducing agent, an early strength agent, a water repellent and a foam stabilizer in water, and uniformly stirring to obtain a mixed aqueous solution; adding the dry powder mixture and the mixed aqueous solution into a stirrer for stirring to obtain mixed slurry; adding a chemical foaming agent into the mixed slurry, stirring, pouring the mixed product into a mold, uniformly spreading, foaming, molding, steaming, peeling after coagulation and hardening, cutting, and curing to obtain the artificial vesuvianite porous material. The artificial vesuvianite prepared by the method has multifunction, does not need calcination, and is energy-saving and environment-friendly.

Description

Artificial vesuvianite porous material prepared from iron tailings and preparation method thereof
Technical Field
The invention relates to the technical field of comprehensive utilization of solid waste of tailings and artificial stone, in particular to an artificial vesuvianite porous material prepared from iron tailings and a preparation method thereof.
Background
Volcanic stone (commonly called pumice stone or porous basalt) is a functional environment-friendly material, and is a very precious irregular natural honeycomb porous stone formed by volcanic glass, minerals and bubbles after volcanic explosion, and the stone is widely used for machine section sheets, outer wall decorative plates, stone railings, stone sculptures, stone furniture and the like due to the characteristics of environmental protection, no radioactivity, hard texture, corrosion resistance, wear resistance and the like, and the functions of water absorption, skid resistance, fire resistance, heat preservation, sound absorption, noise reduction and the like.
In recent years, because of the scarcity and limited development of special stone resources such as volcanic stones, enterprises and scientific research institutions try to artificially prepare artificial volcanic stone porous materials. The current method is mainly based on common silicate cement and quick hardening sulphoaluminate cement. The former has slower setting and hardening, low early strength and longer production period; the latter has poor molding stability, which causes easy cracking of the product and leads to high water absorption. And both the two materials take calcined material, namely cement, as main raw materials, and have high energy consumption, high cost and single function. In addition, the strength of the artificial vesuvianite porous material prepared by the two cement gel systems is not high, and the heat preservation and insulation performance is lower than that of the natural vesuvianite material.
In the field of artificial volcanic stones, the volcanic stone has single function, cannot be compared with natural volcanic stones, has complex process for preparing the artificial volcanic stone, and belongs to high energy consumption and high cost, the mechanical properties of the material are ignored in order to obtain a porous structure with good decorative performance, and finally, the compressive strength of the product is low, and the water absorption rate and the durability cannot meet the requirements of high-quality volcanic stones. Therefore, how to prepare the artificial volcanic stone with high strength, low density, low water absorption, multiple functions, multiple colors and low cost by using low-cost raw materials and simple preparation process is a problem to be solved.
Disclosure of Invention
The invention aims to provide an artificial vesuvianite porous material prepared from iron tailings and a preparation method thereof, and solves the technical problems of single function, complex process, high raw material energy consumption and high cost of the existing artificial vesuvianite. The invention develops the artificial vesuvianite porous material prepared by utilizing the solid waste of the iron tailings and the preparation method thereof, and the prepared artificial vesuvianite has the appearance, color and effect similar to those of natural vesuvianite, better compressive strength, heat preservation, heat insulation and waterproof performance than those of the natural vesuvianite, has an electromagnetic wave absorption function and is low in cost by utilizing low-cost raw materials and simple preparation technology.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
an artificial vesuvianite porous material prepared from iron tailings comprises the following raw materials in parts by weight: 35-55 parts of cement, 45-65 parts of iron tailing solid waste with alkali excitation activity, 2-5 parts of retarder, 0.2-0.5 part of water reducer, 0.5-1 part of early strength agent, 0.5-1 part of foam stabilizer, 0.4-1 part of water repellent, 2-8 parts of chemical foaming agent, 0.5-4 parts of inorganic metal oxide pigment and 28-50 parts of water.
Further, the cement is Runfeng cement of PII 52.5 or Ab-Bo cement of PW52.5, and the solid waste of the iron tailings with alkali excitation activity is Hainan Changjiang iron tailings.
Further, the inorganic metal oxide pigment is mainly one or more of titanium dioxide, iron oxide yellow, iron oxide blue, iron oxide red, iron oxide black and carbon black.
Further, the retarder is desulfurized gypsum, the water reducer is red wall CSP-12 early strength polycarboxylate water reducer, the early strength agent is anhydrous sodium sulfate or calcium chloride, the foam stabilizer is methyl cellulose ether or anionic polyacrylamide with molecular weight of 500-800 ten thousand, and the water repellent is calcium stearate.
Further, the chemical foaming agent is 30% hydrogen peroxide or aluminum powder by mass.
Further, the preparation method of the artificial vesuvianite porous material prepared from the iron tailings comprises the following steps:
step 1: firstly, performing alkali excitation and mechanical activation on iron tailing solid waste to obtain iron tailing solid waste with alkali excitation activity, and then placing the iron tailing solid waste, cement, retarder and inorganic mineral pigment in a stirring container, and uniformly stirring to obtain a dry powder mixture;
step 2: respectively dissolving a water reducing agent, an early strength agent, a water repellent and a foam stabilizer in water, and uniformly stirring to obtain a mixed aqueous solution;
step 3: adding the dry powder mixture and the mixed aqueous solution into a stirrer, and stirring for 2-5min under the condition of 100-280 r/min to obtain mixed slurry;
step 4: adding a chemical foaming agent into the mixed slurry, stirring for 10-15 s at 400-800 r/min, pouring the mixed product into a mold, uniformly spreading, foaming and molding, steaming at 50-90 ℃ for 8h, peeling after setting and hardening, cutting, and curing at 20+/-2 ℃ and relative humidity of 95% for 7-28 days to obtain the artificial vesuvianite porous material.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
1. according to the invention, the iron tailings are selected as the main raw material to prepare the artificial vesuvianite, so that the multifunctionality of the artificial vesuvianite can be improved, and the artificial vesuvianite porous material has an electromagnetic wave absorption effect; the strength, heat preservation and insulation performance of the artificial vesuvianite product can be improved, and the water absorption rate is reduced; the comprehensive utilization rate of the iron tailings can be effectively improved, calcination is not needed, the energy-saving and environment-friendly effects are achieved, and the cost for preparing the volcanic rocks can be reduced.
2. According to the invention, the water repellent is added in the preparation of the artificial volcanic rock, so that the water absorption rate can be reduced, and as the water repellent can react with cement paste to generate an insoluble film complex, the insoluble film complex is adsorbed on the surfaces of cement and iron tailing powder to form a water repellent layer, so that the entry of external moisture is prevented, and the water resistance of the artificial volcanic rock porous material is well improved.
3. The prepared artificial vesuvianite porous material has the appearance and appearance color similar to those of natural vesuvianite, has better compressive strength, heat preservation and insulation, waterproof performance than that of natural vesuvianite, electromagnetic wave absorption function and low cost by using low-cost raw materials and simple preparation process.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the examples and by way of preferred examples. It should be noted, however, that many of the details set forth in the description are merely provided to provide a thorough understanding of one or more aspects of the invention, and that these aspects of the invention may be practiced without these specific details.
An artificial vesuvianite porous material prepared from iron tailings comprises the following raw materials in parts by weight: 35-55 parts of cement, 45-65 parts of iron tailing solid waste with alkali excitation activity, 2-5 parts of retarder, 0.2-0.5 part of water reducer, 0.5-1 part of early strength agent, 0.5-1 part of foam stabilizer, 0.4-1 part of water repellent, 2-8 parts of chemical foaming agent, 0.5-4 parts of inorganic metal oxide pigment and 28-50 parts of water. The cement is Runfeng cement of PII 52.5 or Ab-Bo cement of PW52.5, and the solid waste of the iron tailings with alkali excitation activity is Hainan Changjiang iron tailings; the inorganic metal oxide pigment is mainly one or more of titanium dioxide, iron oxide yellow, iron oxide blue, iron oxide red, iron oxide black and carbon black; the retarder is desulfurized gypsum, the water reducer is red wall CSP-12 early strength type polycarboxylate water reducer, the early strength agent is anhydrous sodium sulfate or calcium chloride, the foam stabilizer is methyl cellulose ether or anionic polyacrylamide with molecular weight of 500-800 ten thousand, and the water repellent is calcium stearate; the chemical foaming agent is 30% hydrogen peroxide or aluminum powder by mass.
The preparation method of the artificial vesuvianite porous material prepared from the iron tailings comprises the following steps:
step 1: firstly, performing alkali excitation and mechanical activation on iron tailing solid waste to obtain iron tailing solid waste with alkali excitation activity, and then placing the iron tailing solid waste, cement, retarder and inorganic mineral pigment in a stirring container, and uniformly stirring to obtain a dry powder mixture;
step 2: respectively dissolving a water reducing agent, an early strength agent, a water repellent and a foam stabilizer in water, and uniformly stirring to obtain a mixed aqueous solution;
step 3: adding the dry powder mixture and the mixed aqueous solution into a stirrer, and stirring for 2-5min under the condition of 100-280 r/min to obtain mixed slurry;
step 4: adding a chemical foaming agent into the mixed slurry, stirring for 10-15 s at 400-800 r/min, pouring the mixed product into a mold, uniformly spreading, foaming and molding, steaming at 50-90 ℃ for 8h, peeling after setting and hardening, cutting, and curing at 20+/-2 ℃ and relative humidity of 95% for 7-28 days to obtain the artificial vesuvianite porous material.
According to the invention, the iron tailings are used as the main raw material, so that the multifunctionality of the artificial volcanic rock can be improved, and the artificial volcanic rock porous material has an electromagnetic wave absorption effect: the iron tailings have a chemical composition mainly comprising iron oxides, followed by silica and other metal oxides (the main chemical composition is shown in table 1). The main existence forms of the large amount of metal oxides are spinel forms related to magnetite, hematite, pyrite and the like, and the mineral composition of the multiferroic phase can have magnetic polarization, electric polarization effect and polarization relaxation loss, so that the wave absorbing performance of the multiferroic phase is greatly enhanced; the iron tailings also contain a large amount of nonmetallic mineral components such as silicon dioxide with low dielectric constant, potassium feldspar and the like, so that the relative dielectric constant of the composite material is reduced, and a large amount of wave-transmitting channels can be provided after the composite material is filled into the volcanic stone matrix with the artificial porous structure, so that the composite material has good impedance matching characteristics, and more electromagnetic waves are guided into the material and are lost. The iron tailings have good electromagnetic loss characteristics and impedance matching characteristics, so that a good material foundation is provided for the application of the iron tailings in the field of wave-absorbing building materials.
TABLE 1 chemical composition of iron tailings (mass%)
Figure BDA0003992862110000041
According to the invention, the iron tailings are used as main raw materials, so that the strength, heat preservation and heat insulation properties of the artificial volcanic rock product can be improved, and the water absorption rate is reduced: the invention uses the solid waste of the iron tailings to carry out alkali excitation and mechanical activation to obtain the iron tailings with alkali excitation activity, so that the specific surface area after activation is more than 450kg/m 3 Therefore, the size of the activated iron tailings is smaller than that of cement particles, when the iron tailings are doped in a proper amount, the initial density of the cement paste can be improved, and the fine iron tailings can be filled into the pores of the cement hydration product gel, so that the pore structure of the concrete can be effectively improved, and the compactness, strength and water absorption of the finally formed net paste are increased.
According to the invention, the water repellent is added in the preparation of the artificial volcanic rock, so that the water absorption rate is low, and the water repellent can react with cement paste to generate an insoluble film complex, so that a water repellent layer is formed on the surfaces of cement and iron tailing powder by adsorption, the entry of external moisture is prevented, and the water resistance of the artificial volcanic rock porous material is well improved.
According to the invention, the iron tailings are selected as the main raw materials to prepare the artificial vesuvianite, so that the comprehensive utilization rate of the iron tailings can be effectively improved, calcination is not needed, the energy-saving and environment-friendly effects are achieved, and the cost for preparing the vesuvianite can be reduced.
Example 1
Step 1: 40 parts of Runfeng cement 52.5, 60 parts of iron tailing solid waste with alkali excitation activity, 5 parts of retarder, 1.5 parts of iron oxide red pigment and 0.5 part of titanium white are placed in a stirring container and uniformly stirred to obtain a dry powder mixture;
step 2: respectively dissolving 0.3 part of water reducer, 0.8 part of early strength agent, 0.4 part of foam stabilizer and 0.6 part of water 35 parts of water repellent in water, and uniformly stirring to obtain a mixed water solution;
step 3: adding the dry powder mixture and the mixed aqueous solution into a stirrer, uniformly mixing and pulping for 3min, wherein the stirring speed of pulping is 180r/min, so as to obtain mixed slurry;
step 4: adding 3 parts of hydrogen peroxide and 0.2 part of aluminum powder into the mixed slurry, rapidly stirring for 10s under the condition of 600r/min, pouring the mixed product into a mold, uniformly paving, foaming and molding, steaming and curing for 8 hours under the condition of 55 ℃, peeling after setting and hardening, cutting, and curing for 28 days under the condition of 20+/-2 ℃ and relative humidity of 95%, thus obtaining the artificial red volcanic porous material.
Example 2
Step 1: 45 parts of Abo cement with PW52.5, 55 parts of iron tailing solid waste with alkali excitation activity, 5 parts of retarder, 1 part of ferric oxide blue and 1 part of ferric oxide red are placed in a stirring container and uniformly stirred to obtain a dry powder mixture;
step 2: respectively dissolving 0.4 part of water reducer, 1 part of early strength agent, 0.5 part of foam stabilizer, 0.6 part of water repellent and 37 parts of water in water, and uniformly stirring to obtain a mixed water solution;
step 3: adding the dry powder mixture and the mixed aqueous solution into a stirrer, uniformly mixing and pulping for 3min, wherein the stirring speed of pulping is 180r/min, so as to obtain mixed slurry;
step 4: adding 3.5 parts of hydrogen peroxide and 0.3 part of aluminum powder into the mixed slurry, rapidly stirring for 12s under the condition of 600r/min, pouring the mixed product into a mold, uniformly paving, foaming and forming, steaming and curing for 8 hours under the condition of 55 ℃, peeling and cutting after coagulation and hardening, and curing for 28 days under the condition of 20+/-2 ℃ and relative humidity of 95%, thus obtaining the artificial purple red volcanic porous material.
Example 3
Step 1: 50 parts of Runfeng cement of 52.5, 50 parts of iron tailing solid waste with alkali excitation activity, 5 parts of retarder, 1 part of iron oxide red, 1 part of iron oxide yellow and 0.5 part of titanium dioxide are placed in a stirring container and uniformly stirred to obtain a dry powder mixture;
step 2: respectively dissolving 0.3 part of water reducer, 0.8 part of early strength agent, 0.4 part of foam stabilizer, 0.7 part of water repellent and 33 parts of water in water, and uniformly stirring to obtain a mixed water solution;
step 3: adding the dry powder mixture and the mixed aqueous solution into a stirrer, uniformly mixing and pulping for 3min, wherein the stirring speed of pulping is 180r/min, so as to obtain mixed slurry;
step 4: adding 4 parts of hydrogen peroxide and 0.2 part of aluminum powder into the mixed slurry, rapidly stirring for 10s under the condition of 600r/min, pouring the mixed product into a mold, uniformly paving, foaming and molding, steaming and curing for 8 hours under the condition of 55 ℃, peeling after setting and hardening, cutting, and curing for 28 days under the condition of 20+/-2 ℃ and relative humidity of 95%, thus obtaining the artificial orange vesuvianite porous material.
Example 4
Step 1: 40 parts of Runfeng cement 52.5, 60 parts of iron tailing solid waste with alkali excitation activity, 5 parts of retarder, 1 part of iron oxide black and 0.5 part of carbon black are placed in a stirring container and uniformly stirred to obtain a dry powder mixture;
step 2: respectively dissolving 0.4 part of water reducer, 1 part of early strength agent, 0.6 part of foam stabilizer, 0.6 part of water repellent and 40 parts of water in water, and uniformly stirring to obtain a mixed water solution;
step 3: adding the dry powder mixture and the mixed aqueous solution into a stirrer, uniformly mixing and pulping for 3min, wherein the stirring speed of pulping is 180r/min, so as to obtain mixed slurry;
step 4: adding 4 parts of hydrogen peroxide and 0.4 part of aluminum powder into the mixed slurry, rapidly stirring for 10s under the condition of 600r/min, pouring the mixed product into a mold, uniformly paving, foaming and molding, steaming and curing for 8 hours under the condition of 55 ℃, peeling after setting and hardening, cutting, and curing for 28 days under the condition of 20+/-2 ℃ and relative humidity of 95%, thus obtaining the artificial black volcanic porous material.
Example 5
Step 1: 35 parts of Runfeng cement 52.5, 65 parts of iron tailing solid waste with alkali excitation activity, 5 parts of retarder and 0.5 part of iron oxide black are placed in a stirring container and uniformly stirred to obtain a dry powder mixture;
step 2: respectively dissolving 0.5 part of water reducer, 1 part of early strength agent, 0.4 part of foam stabilizer, 0.6 part of water repellent and 30 parts of water in water, and uniformly stirring to obtain a mixed water solution;
step 3: adding the dry powder mixture and the mixed aqueous solution into a stirrer, uniformly mixing and pulping for 3min, wherein the stirring speed of pulping is 180r/min, so as to obtain mixed slurry;
step 4: adding 1 part of hydrogen peroxide and 0.3 part of aluminum powder into the mixed slurry, rapidly stirring for 15s at 600r/min, pouring the mixed product into a mold, uniformly spreading, foaming and molding, steaming at 55 ℃ for 8 hours, peeling after setting and hardening, cutting, and curing at 20+/-2 ℃ and relative humidity of 95% for 28 days to obtain the artificial small-pore gray vesuvianite porous material.
Example 6
Step 1: 50 parts of Runfeng cement of 52.5, 50 parts of iron tailing solid waste with alkali excitation activity, 5 parts of retarder and 0.5 part of iron oxide black are placed in a stirring container and uniformly stirred to obtain a dry powder mixture;
step 2: respectively dissolving 0.4 part of water reducer, 1 part of early strength agent, 1 part of foam stabilizer, 0.8 part of water repellent and 35 parts of water in water, and uniformly stirring to obtain a mixed aqueous solution;
step 3: adding the dry powder mixture and the mixed aqueous solution into a stirrer, uniformly mixing and pulping for 3min, wherein the stirring speed of pulping is 180r/min, so as to obtain mixed slurry;
step 4: adding 6 parts of hydrogen peroxide and 0.2 part of aluminum powder into the mixed slurry, rapidly stirring for 10s under the condition of 600r/min, pouring the mixed product into a mold, uniformly paving, foaming and molding, steaming and curing for 8 hours under the condition of 55 ℃, peeling after setting and hardening, cutting, and curing for 28 days under the condition of 20+/-2 ℃ and relative humidity of 95%, thus obtaining the artificial coarse-pore gray vesuvianite porous material.
Comparative example 1
Step 1: 40 parts of Runfeng cement 52.5, 60 parts of iron tailing solid waste with alkali excitation activity, 1 part of retarder and 1 part of iron oxide red, and 0.5 part of titanium dioxide are placed in a stirring container and uniformly stirred to obtain a dry powder mixture;
step 2: respectively dissolving 0.1 part of water reducer, 0.1 part of early strength agent, 0 part of foam stabilizer, 0 part of water repellent and 35 parts of water in water, and uniformly stirring to obtain a mixed aqueous solution;
step 3: adding the dry powder mixture and the mixed aqueous solution into a stirrer, uniformly mixing and pulping for 3min, wherein the stirring speed of pulping is 180r/min, so as to obtain mixed slurry;
step 4: adding 4 parts of hydrogen peroxide into the mixed slurry, rapidly stirring for 10s at 600r/min, pouring the mixed product into a mold, uniformly spreading, foaming and molding, steaming and curing at 55 ℃ for 8h, peeling after coagulation and hardening, cutting, and curing at 20+/-2 ℃ and relative humidity of 95% for 28 days to obtain the artificial red volcanic porous material.
Comparative example 2
Step 1: 35 parts of Runfeng cement of 52.5, 65 parts of iron tailing solid waste with alkali excitation activity, 1 part of retarder and 1 part of iron oxide black are placed in a stirring container and uniformly stirred to obtain a dry powder mixture;
step 2: respectively dissolving 0.1 part of water reducer, 0.1 part of early strength agent, 0 part of foam stabilizer, 0 part of water repellent and 35 parts of water in water, and uniformly stirring to obtain a mixed aqueous solution;
step 3: adding the dry powder mixture and the mixed aqueous solution into a stirrer, uniformly mixing and pulping for 3min, wherein the stirring speed of pulping is 180r/min, so as to obtain mixed slurry;
step 4: adding 1 part of hydrogen peroxide into the mixed slurry, rapidly stirring for 15s at 600r/min, pouring the mixed product into a mold, uniformly spreading, foaming and molding, steaming at 55 ℃ for 8 hours, peeling after coagulation and hardening, cutting, and curing at 20+/-2 ℃ and relative humidity of 95% for 28 days to obtain the artificial small-pore gray vesuvianite porous material.
Comparative example 3
Step 1: 50 parts of Runfeng cement of 52.5, 50 parts of iron tailing solid waste with alkali excitation activity, 1 part of retarder and 0.5 part of iron oxide black are placed in a stirring container and uniformly stirred to obtain a dry powder mixture;
step 2: respectively dissolving 0.1 part of water reducer, 0.1 part of early strength agent, 0 part of foam stabilizer, 0 part of water repellent and 35 parts of water in water, and uniformly stirring to obtain a mixed aqueous solution;
step 3: adding the dry powder mixture and the mixed aqueous solution into a stirrer, uniformly mixing and pulping for 3min, wherein the stirring speed of pulping is 180r/min, so as to obtain mixed slurry;
step 4: adding 6 parts of hydrogen peroxide into the mixed slurry, rapidly stirring for 10s at 600r/min, pouring the mixed product into a mold, uniformly spreading, foaming and molding, steaming at 55 ℃ for 8h, peeling after coagulation and hardening, cutting, and curing at 20+/-2 ℃ with relative humidity of 95% for 28 days to obtain the artificial coarse-pore gray vesuvianite porous material.
TABLE 2 results of Performance measurements for examples 1-6, comparative examples 1-3
Figure BDA0003992862110000081
The artificial vesuvianite prepared by the invention is similar to the true vesuvianite in color according to examples 1-6, has red, orange, gray and black colors and vesuvianites with different pore sizes, has compressive strength higher than the standard requirement of JGJ/T341-2014 'foam concrete application technical specification', has water absorption and heat conductivity lower than the standard requirement, has electromagnetic wave absorption function, and can effectively protect electromagnetic radiation of most frequency bands; and the comparative examples 1-3 are artificial volcanic stones prepared by reducing the formulas of the chemical foaming agent aluminum powder, the foam stabilizer, the water repellent and the water reducing agent on the basis of the examples, the compressive strength of the artificial volcanic stones is reduced, the water absorption is increased, the heat insulation performance is also reduced, and the molding stability of products is poor, which means that if the foaming agent, the foam stabilizer, the water repellent and the water reducing agent and the proportion thereof are absent, the final products cannot meet the standard requirements.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.

Claims (6)

1. An artificial vesuvianite porous material prepared from iron tailings is characterized in that: the material comprises the following raw materials in parts by weight: 35-55 parts of cement, 45-65 parts of iron tailing solid waste with alkali excitation activity, 2-5 parts of retarder, 0.2-0.5 part of water reducer, 0.5-1 part of early strength agent, 0.5-1 part of foam stabilizer, 0.4-1 part of water repellent, 2-8 parts of chemical foaming agent, 0.5-4 parts of inorganic metal oxide pigment and 28-50 parts of water.
2. The artificial vesuvianite porous material prepared from iron tailings according to claim 1, wherein: the cement is Runfeng cement of PII 52.5 or Ab-Bo cement of PW52.5, and the solid waste of the iron tailings with alkali excitation activity is Hainan Changjiang iron tailings.
3. The artificial vesuvianite porous material prepared from iron tailings according to claim 1, wherein: the inorganic metal oxide pigment is mainly one or more of titanium dioxide, iron oxide yellow, iron oxide blue, iron oxide red, iron oxide black and carbon black.
4. The artificial vesuvianite porous material prepared from iron tailings according to claim 1, wherein: the retarder is desulfurized gypsum, the water reducer is red wall CSP-12 early strength type polycarboxylate water reducer, the early strength agent is anhydrous sodium sulfate or calcium chloride, the foam stabilizer is methyl cellulose ether or anionic polyacrylamide with molecular weight of 500-800 ten thousand, and the water repellent is calcium stearate.
5. The artificial vesuvianite porous material prepared from iron tailings according to claim 1, wherein: the chemical foaming agent is 30% hydrogen peroxide or aluminum powder by mass.
6. The method for preparing the artificial vesuvianite porous material prepared from the iron tailings according to claim 1, wherein the method comprises the following steps: the method comprises the following steps:
step 1: firstly, performing alkali excitation and mechanical activation on iron tailing solid waste to obtain iron tailing solid waste with alkali excitation activity, and then placing the iron tailing solid waste, cement, retarder and inorganic mineral pigment in a stirring container, and uniformly stirring to obtain a dry powder mixture;
step 2: respectively dissolving a water reducing agent, an early strength agent, a water repellent and a foam stabilizer in water, and uniformly stirring to obtain a mixed aqueous solution;
step 3: adding the dry powder mixture and the mixed aqueous solution into a stirrer, and stirring for 2-5min under the condition of 100-280 r/min to obtain mixed slurry;
step 4: adding a chemical foaming agent into the mixed slurry, stirring for 10-15 s at 400-800 r/min, pouring the mixed product into a mold, uniformly spreading, foaming and molding, steaming at 50-90 ℃ for 8h, peeling after setting and hardening, cutting, and curing at 20+/-2 ℃ and relative humidity of 95% for 7-28 days to obtain the artificial vesuvianite porous material.
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