CN113816724A - Coal gangue sandstone sponge brick and preparation method thereof - Google Patents
Coal gangue sandstone sponge brick and preparation method thereof Download PDFInfo
- Publication number
- CN113816724A CN113816724A CN202111216438.XA CN202111216438A CN113816724A CN 113816724 A CN113816724 A CN 113816724A CN 202111216438 A CN202111216438 A CN 202111216438A CN 113816724 A CN113816724 A CN 113816724A
- Authority
- CN
- China
- Prior art keywords
- sandstone
- coal gangue
- sponge brick
- green body
- preparation
- 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.)
- Granted
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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/1324—Recycled material, e.g. tile dust, stone waste, spent refractory material
-
- 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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/1305—Organic additives
-
- 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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/131—Inorganic additives
-
- 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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/1328—Waste materials; Refuse; Residues without additional clay
-
- 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
- C04B33/00—Clay-wares
- C04B33/24—Manufacture of porcelain or white ware
-
- 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
- C04B33/00—Clay-wares
- C04B33/30—Drying methods
-
- 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
- C04B33/00—Clay-wares
- C04B33/32—Burning methods
-
- 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
- C04B38/063—Preparing or treating the raw materials individually or as batches
- C04B38/0635—Compounding ingredients
- C04B38/0645—Burnable, meltable, sublimable materials
- C04B38/068—Carbonaceous materials, e.g. coal, carbon, graphite, hydrocarbons
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6562—Heating rate
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6567—Treatment time
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
-
- 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 belongs to the technical field of comprehensive utilization of solid waste resources, and particularly relates to a coal gangue sandstone sponge brick and a preparation method thereof, wherein the coal gangue sandstone sponge brick is prepared by firing the following raw materials in percentage by mass: 50-80% of coal gangue and 20-50% of sandstone, wherein the total mass of the coal gangue and the sandstone is 6-8% of a binder solution; the preparation method comprises the following steps: s1, weighing the coal gangue, the sandstone and the binder solution according to the proportion, stirring the coal gangue and the sandstone, slowly dropwise adding the binder solution in the stirring process, and continuously stirring uniformly to obtain a mixture; and S2, placing the mixture into a mold, forming a green body by utilizing the pressure of a press, drying the green body after the green body is placed in a room and dried in the shade, and placing the green body into a firing plate to be fired to obtain the sponge brick. The invention utilizes sandstone to play a role of a flux and a skeleton structure, and leaves pores after the coal remained in the coal gangue is combusted, so that the prepared sponge brick has high compressive strength and good water retention property, and provides a new way for the comprehensive utilization of solid waste resources.
Description
Technical Field
The invention belongs to the technical field of comprehensive utilization of solid waste resources, and particularly relates to a coal gangue sandstone sponge brick and a preparation method thereof.
Background
The coal gangue is solid waste generated in the coal mining and washing processes, is a black grey rock which has lower carbon content and is harder than coal and is associated with a coal bed in the coal forming process, and comprises tunneling gangue in the tunneling process, gangue mined from a top plate, a bottom plate and an interlayer in the mining process and washing gangue picked in the coal washing process. With the development of scientific technology, the coal production of the coal group in the promotion is always increased every year, the amount of natural coal gangue solid waste is increased, and at present, the coal gangue is basically treated in an outdoor composting way. The large amount of stacked coal gangue not only occupies the land and affects the ecological environment, the gangue eluviation water pollutes the surrounding soil and underground water, but also the coal gangue contains certain combustible substances and generates spontaneous combustion under proper conditions, and harmful gases such as sulfur dioxide, nitrogen oxide, carbon oxide, smoke dust and the like are discharged to pollute the atmospheric environment and affect the body health of residents in mining areas.
At present, the country accelerates the construction of sponge cities, improves road infrastructure, enhances the self-circulation function of the cities, and constructs ecological civilized cities. The materials paved at present mainly comprise cement mortar, non-fired concrete water permeable bricks and broken ceramic water permeable bricks. The broken ceramic water permeable brick is prepared by crushing broken ceramic pieces, adding sintering fluxing agent and sintering at high temperature. The broken ceramic pieces are influenced by the ceramic building industry, a general sponge brick production base can only be built near a ceramic building enterprise, the broken ceramic amount depends on the finished product rate of the ceramic enterprise, and in addition, a sintering aid needs to be additionally added, so that the production cost is increased.
Therefore, how to comprehensively utilize the coal gangue is a current urgent task for practicing sustainable development and ecological civilization construction in China, the environmental problem and the ecological problem caused by stacking of a large amount of solid wastes are avoided, the coal gangue can be consumed, meanwhile, waste materials can be changed into valuable materials, the method is applied to laying of sponge city construction, the production cost is reduced, and a utilization way is provided for the construction of the sponge city.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the coal gangue sandstone sponge brick and the preparation method thereof, the material does not need to additionally add a sintering aid, the cost of the raw material is low, but the prepared sponge brick product has high strength, good water retention performance, simple preparation method and high product value.
The invention aims to provide a coal gangue sandstone sponge brick which is prepared by firing the following raw materials in percentage by mass: 50-80% of coal gangue and 20-50% of sandstone, wherein the total mass of the coal gangue and the sandstone is 6-8% of a binder solution.
Preferably, the granularity of the coal gangue and the granularity of the sandstone are respectively 8-20 meshes.
Preferably, the binder is one or more of polyvinyl alcohol, hydroxypropyl cellulose, carboxymethyl cellulose and silica sol.
Preferably, the mass concentration of the binder solution is 2-5%.
The invention also aims to provide a preparation method of the coal gangue sandstone sponge brick, which comprises the following steps:
s1, weighing the coal gangue, the sandstone and the binder in proportion, firstly, uniformly stirring the coal gangue and the sandstone, then slowly dropwise adding the binder in the stirring process, controlling the water content to be 6-8% of the total material, and continuously and uniformly stirring to obtain a mixture;
and S2, putting the mixture obtained in the step S1 into a mold, pressing and molding a green body by using a press, drying the green body in the shade after the green body is placed in a room, and then putting the green body into a firing plate to be fired to obtain the sponge brick.
Preferably, in S2, the press pressure is 25 to 35MPa and the green article size is 10cm by 20cm by 5.5 cm.
Preferably, in S2, the drying time in the shade is 24 hours or more.
Preferably, in S2, the drying temperature is 50-70 ℃ and the drying time is 8-12 h.
Preferably, in S2, the firing plate is a perforated mullite plate.
Preferably, in S2, the firing method is: firstly, from room temperature to 900 ℃, the heating rate is 10 ℃/min, and the temperature is kept for 30 min; and then, continuously heating to the firing temperature of 1120-1180 ℃, keeping the temperature for 30min at the heating rate of 10 ℃/min, and cooling to the room temperature.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention takes the solid waste generated in the coal mining process as the main raw material, realizes the comprehensive utilization of the waste raw materials, not only greatly saves the cost, but also applies the solid waste in a large range, and avoids the environmental problem and the ecological problem caused by the stacking of a large amount of solid waste.
2. The invention utilizes the hard sandstone to combine with the coal gangue to prepare the sponge brick, thereby avoiding the method that the sponge brick is prepared by taking broken porcelain particles as the main material and adding a proper amount of sintering auxiliary agent at the same time, wherein the hard sandstone contains 64.92 percent of SiO2Can play a skeleton role for the sponge brick, and the hard sandstone contains K2O and Na2O plays the effect of flux, burns at 1120 ~ 1180 ℃ temperature range, can carry out the neck with solid particle and connect, keeps the skeleton texture of self again, has increased the compressive strength of sponge brick, has realized the effect of a raw materials multiple functions, avoids additionally using plus sintering auxiliary agent, has reduced manufacturing cost.
3. The coal gangue is used as a main raw material, contains coal with a certain content, and can be combusted to release a large amount of heat in the firing process, so that energy is saved; on the other hand, after the coal is combusted, a porous structure is formed in coal gangue particles and is communicated with a pore structure formed by stacking the coal gangue and the hard sandstone to form a tortuous high-porosity network structure, so that the water retention property of the sponge brick is enhanced.
4. The sponge brick prepared by the invention has the advantages that the using amount of solid wastes and local idle raw materials reaches 100 percent, the production cost is greatly reduced, the product strength is high, the compressive strength reaches 65-82.5MPa, the porosity is high,the apparent porosity reaches 38 percent, and the water retention is good and reaches 18.5L/m2The ceramic material is applied to sponge city construction and is an environment-friendly ceramic material.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to data in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention, which will be limited only by the appended claims, wherein the various materials, reagents, instruments and equipment used in the following examples are commercially available or may be prepared by conventional methods.
A great amount of coal gangue is stacked on the coal advancing group, and the chemical composition of the coal gangue is as follows: SiO2245.26% of Al2O323.26% of Fe2O33.6 percent of CaO, 1.09 percent of CaO, 0.42 percent of MgO and K2O accounts for 1.48%, and Na2O accounts for 0.41%, and SO30.75% of TiO20.75% and loss on ignition 22.98%; therefore, the sponge brick prepared by utilizing the coal gangue not only consumes the coal gangue, but also can change waste into valuable, can provide a utilization way for the construction of sponge cities, and realizes the win-win of environmental treatment and products with high added value. The taihang mountain in Changzhi, which also has a great deal of sandstone, is not only rich in SiO2, but also has more flux, and the chemical composition is as follows: SiO2264.92% of Al2O315.81% of Fe2O35.87% of CaO, 1.17% of CaO, 1.48% of MgO, and K2O accounts for 2.76% and Na2O accounts for 1.21 percent, and TiO20.79% and 5.99% of ignition loss, and the surface of the ceramic particles can generate liquid phase at the temperature of about 1100 ℃, but the particle framework structure is still maintained, and the ceramic particles are natural fluxed ceramic raw materials. Thus, coal gangue is mixedThe method is an effective method for ensuring the green development of sponge city construction
Example 1
The coal gangue sandstone sponge brick is prepared by firing the following raw materials in percentage by mass: 70 percent of coal gangue, 30 percent of sandstone, and 7 percent of binder solution of the total mass of the coal gangue and the sandstone. Wherein the granularity of the coal gangue and the sandstone is 8-20 meshes; the binder is a polyvinyl alcohol solution with the mass concentration of 3%.
The preparation method of the coal gangue sandstone sponge brick comprises the following steps:
s1, weighing the coal gangue, the sandstone and a polyvinyl alcohol solution with the mass concentration of 3% in proportion, firstly stirring the coal gangue and the sandstone in a stirrer for 30min, then slowly dropwise adding the polyvinyl alcohol solution with the total mass of 7% of the coal gangue and the sandstone in the stirring process, and continuously stirring uniformly to obtain a mixture;
s2, placing the mixture obtained in the step S1 into a mold, forming a green body with the size of 10cm x 20cm x 5.5cm by utilizing the pressure of a press, placing the green body into a room, drying the green body in the shade for 24 hours, then placing the green body into a drying room, drying the green body at the temperature of 60 ℃ for 12 hours, and then placing the green body into a sintering plate and sending the green body into a kiln together for sintering; the firing mode is as follows: the temperature is between room temperature and 900 ℃, the heating rate is 10 ℃/min, and the temperature is maintained at 900 ℃ for 30 min; raising the temperature to 900 ℃ to 1170 ℃ of the firing temperature, keeping the temperature at 1170 ℃ for 30min, and then naturally cooling to room temperature to obtain the finished sponge brick.
Experiments prove that the compressive strength of the sponge brick prepared in the example 1 is 82.5MPa, and the water retention rate is 18.5L/m2The water permeability is 68Kg/m2·min。
Example 2
The coal gangue sandstone sponge brick is prepared by firing the following raw materials in percentage by mass: : 60 percent of coal gangue, 40 percent of sandstone, and 7 percent of binder solution of the total mass of the coal gangue and the sandstone. Wherein the granularity of the coal gangue and the granularity of the sandstone are respectively 8-20 meshes; the binder is hydroxypropyl cellulose solution with mass concentration of 2%.
The preparation method of the coal gangue sandstone sponge brick comprises the following steps:
s1, weighing the coal gangue, the sandstone and a hydroxypropyl cellulose solution with the mass concentration of 2% in proportion, firstly stirring the coal gangue and the sandstone in a stirrer for 30min, then slowly dropwise adding the hydroxypropyl cellulose solution with the total mass of 7% of the coal gangue and the sandstone in the stirring process, and continuously stirring uniformly to obtain a mixture;
s2, placing the mixture obtained in the step S1 into a mold, forming a green body with the size of 10cm x 20cm x 5.5cm by utilizing the pressure of a press, placing the green body into a room, drying the green body in the shade for 24 hours, then placing the green body into a drying room, drying the green body at 55 ℃ for 12 hours, and then placing the green body into a sintering plate and sending the green body into a kiln together for sintering; the firing mode is as follows: the temperature is between room temperature and 900 ℃, the heating rate is 10 ℃/min, and the temperature is maintained at 900 ℃ for 30 min; raising the temperature to 1150 deg.c at the heating rate of 10 deg.c/min, maintaining at 1150 deg.c for 30min, and cooling naturally to room temperature to obtain the final product.
Experiments prove that the compressive strength of the sponge brick prepared in the example 2 is 70.3MPa, and the water retention rate is 16.0L/m2The water permeability is 66Kg/m2·min。
Example 3
The coal gangue sandstone sponge brick is prepared by firing the following raw materials in percentage by mass: 50 percent of coal gangue, 50 percent of sandstone, and 7 percent of binder solution of the total mass of the coal gangue and the sandstone. Wherein the granularity of the coal gangue and the granularity of the sandstone are respectively 8-20 meshes; the binder is a silica sol solution with the mass concentration of 5 percent.
The preparation method of the coal gangue sandstone sponge brick comprises the following steps:
s1, weighing the coal gangue, the sandstone and a silica sol solution with the mass concentration of 5% in proportion, firstly stirring the coal gangue and the sandstone in a stirrer for 30min, then slowly dropwise adding the silica sol solution with the total mass of 7% of the coal gangue and the sandstone in the stirring process, and continuously stirring uniformly to obtain a mixture;
s2, placing the mixture obtained in the step S1 into a mold, forming a green body with the size of 10cm x 20cm x 5.5cm by utilizing the pressure of a press, placing the green body into a room, drying the green body in the shade for 24 hours, then placing the green body into a drying room, drying the green body at 65 ℃ for 9 hours, and then placing the green body into a sintering plate and sending the green body into a kiln together for sintering; the firing mode is as follows: the temperature is between room temperature and 900 ℃, the heating rate is 10 ℃/min, and the temperature is maintained at 900 ℃ for 30 min; heating to the firing temperature of 1130 ℃ at 900 ℃, keeping the temperature at 1130 ℃ at the heating rate of 10 ℃/min for 30min, and then naturally cooling to the room temperature to obtain the finished sponge brick.
Experiments prove that the compressive strength of the sponge brick prepared in the example 3 is 65.8MPa, and the water retention rate is 15.7L/m2The water permeability is 64.5Kg/m2·min。
Example 4
The coal gangue sandstone sponge brick is prepared by firing the following raw materials in percentage by mass: 40% of coal gangue, 60% of sandstone, and 7% of binder solution of the total mass of the coal gangue and the sandstone. Wherein the granularity of the coal gangue and the granularity of the sandstone are respectively 8-20 meshes; the binder is composed of polyvinyl alcohol with mass concentration of 3% and silica sol solution with mass concentration of 5% in half.
The preparation method of the coal gangue sandstone sponge brick comprises the following steps:
s1, weighing coal gangue, sandstone, polyvinyl alcohol with the mass concentration of 3% and silica sol solution with the mass concentration of 5% in proportion, firstly stirring the coal gangue and the sandstone in a stirrer for 30min, then slowly dropwise adding a mixed solution containing the polyvinyl alcohol with the mass concentration of 3% and the silica sol with the mass concentration of 5% in the coal gangue and the sandstone, which is 7% of the total mass of the coal gangue and the sandstone, and continuously stirring uniformly to obtain a mixture;
s2, placing the mixture obtained in the step S1 into a container, forming a green body with the size of 10cm x 20cm x 5.5cm by utilizing the pressure of a press, placing the green body into a room, drying the green body in the shade for 24 hours, then placing the green body into a drying room, drying the green body at the temperature of 60 ℃ for 12 hours, and then placing the green body into a sintering plate and sending the green body into a kiln together for sintering; the firing mode is as follows: the temperature is between room temperature and 900 ℃, the heating rate is 10 ℃/min, and the temperature is maintained at 900 ℃ for 30 min; heating to the firing temperature of 1130 ℃ at 900 ℃, keeping the temperature at 1150 ℃ for 30min at the heating rate of 10 ℃/min, and naturally cooling to the room temperature to obtain the finished sponge brick.
Experiments prove that the compressive strength of the sponge brick prepared in the example 4 is 75.8MPa, and the water retention rate is 14.6L/m2The water permeability is 60.5Kg/m2·min。
Example 5
The coal gangue sandstone sponge brick is prepared by firing the following raw materials in percentage by mass: 30 percent of coal gangue, 70 percent of sandstone, and 6 percent of binder solution of the total mass of the coal gangue and the sandstone. Wherein the granularity of the coal gangue and the granularity of the sandstone are respectively 8-20 meshes; the binder is a silica sol solution with the mass concentration of 5 percent.
The preparation method of the coal gangue sandstone sponge brick comprises the following steps:
s1, weighing the coal gangue, the sandstone and a silica sol solution with the mass concentration of 5% in proportion, firstly stirring the coal gangue and the sandstone in a stirrer for 30min, then slowly dropwise adding the silica sol solution with the total mass of 6% of the coal gangue and the sandstone in the stirring process, and continuously stirring uniformly to obtain a mixture;
s2, placing the mixture obtained in the step S1 into a mold, forming a green body with the size of 10cm x 20cm x 5.5cm by utilizing the pressure of a press, placing the green body into a room, drying the green body in the shade for 24 hours, then placing the green body into a drying room, drying the green body at the temperature of 60 ℃ for 11 hours, and then placing the green body into a sintering plate and sending the green body into a kiln together for sintering; the firing mode is as follows: the temperature is between room temperature and 900 ℃, the heating rate is 10 ℃/min, and the temperature is maintained at 900 ℃ for 30 min; heating to the firing temperature of 1130 ℃ at 900 ℃, keeping the temperature at 1150 ℃ for 30min at the heating rate of 10 ℃/min, and naturally cooling to the room temperature to obtain the finished sponge brick.
Experiments prove that the compressive strength of the sponge brick prepared in the example 5 is 68.8MPa, and the water retention rate is 12.7L/m2The water permeability is 58.5Kg/m2·min。
Example 6
The coal gangue sandstone sponge brick is prepared by firing the following raw materials in percentage by mass: 100% sandstone with the addition of 7% binder solution. Wherein the granularity of the sandstone is 8-20 meshes; the binder is a silica sol solution with the mass concentration of 5 percent.
The preparation method of the coal gangue sandstone sponge brick comprises the following steps:
s1, weighing sandstone, slowly dropwise adding a silica sol solution in the stirring process, and stirring for 30min to obtain a uniformly dispersed mixture;
s2, placing the mixture obtained in the step S1 into a mold, forming a green body with the size of 10cm x 20cm x 5.5cm by utilizing the pressure of a press, placing the green body into a room, drying the green body in the shade for 24 hours, then placing the green body into a drying room, drying the green body at 50 ℃ for 12 hours, and then placing the green body into a sintering plate and sending the green body into a kiln together for sintering; the firing mode is as follows: the temperature is between room temperature and 900 ℃, the heating rate is 10 ℃/min, and the temperature is maintained at 900 ℃ for 30 min; heating to the firing temperature of 1130 ℃ at 900 ℃, keeping the temperature at 1160 ℃ for 30min at the heating rate of 10 ℃/min, and then naturally cooling to the room temperature to obtain the finished product of the sponge brick.
Experiments prove that the compressive strength of the sponge brick prepared in the example 6 is 69.8MPa, and the water retention rate is 11.7L/m2The water permeability is 61.5Kg/m2·min。
Therefore, the coal gangue of the jin coal group and the sandstone of the YangZhi local area are used as raw materials, the two raw materials are bonded by using the binder and are formed into a sponge brick blank by using pressure, the brick blank is fired at 1120-1180 ℃, the surface of the sandstone particle is used for generating a liquid phase at a high temperature, other particles are bonded, the skeleton structure of the sandstone particle is kept, pores are left after the coal remaining in the coal gangue is fired, and communicated zigzag holes are formed in the whole brick, so that the finished product has high compressive strength and good water-retaining property, the comprehensive utilization of solid waste resources and the waste recycling of waste materials are realized, and the environment-friendly ceramic material with high added value is prepared.
It should be noted that, when the present invention relates to a numerical range, it should be understood that two endpoints of each numerical range and any value between the two endpoints can be selected, and since the steps and methods adopted are the same as those in the embodiment, in order to prevent redundancy, the present invention describes a preferred embodiment. While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. The coal gangue sandstone sponge brick is characterized by being prepared by firing the following raw materials in percentage by mass:
50-80% of coal gangue and 20-50% of sandstone, wherein the total mass of the coal gangue and the sandstone is 6-8% of a binder solution.
2. The coal gangue sandstone sponge brick of claim 1, wherein the particle size of the coal gangue and the sandstone is 8-20 meshes respectively.
3. The coal gangue sandstone sponge brick of claim 1, wherein the binder is one or more of polyvinyl alcohol, hydroxypropyl cellulose, carboxymethyl cellulose, and silica sol.
4. The coal gangue sandstone sponge brick of claim 3, wherein the mass concentration of the binder solution is 2-5%.
5. The preparation method of the coal gangue sandstone sponge brick as claimed in claim 1, which is characterized by comprising the following steps:
s1, weighing the coal gangue, the sandstone and the binder in proportion, firstly, uniformly stirring the coal gangue and the sandstone, then slowly dropwise adding the binder in the stirring process, and continuously and uniformly stirring to obtain a mixture;
and S2, putting the mixture obtained in the step S1 into a mold, pressing and molding a green body by using a press, drying the green body in the shade after the green body is placed in a room, and then putting the green body into a firing plate to be fired to obtain the sponge brick.
6. The preparation method of the coal gangue sandstone sponge brick as claimed in claim 5, wherein in S2, the press pressure is 25-35 MPa, and the size of the green body is 10cm by 20cm by 5.5 cm.
7. The preparation method of the coal gangue sandstone sponge brick as claimed in claim 5, wherein the drying time in the shade is not less than 24h in S2.
8. The preparation method of the coal gangue sandstone sponge brick as claimed in claim 5, wherein the drying temperature in S2 is 50-70 ℃ and the drying time is 8-12 h.
9. The preparation method of the coal gangue sandstone sponge brick as claimed in claim 5, wherein in S2, the firing plate is a perforated mullite plate.
10. The preparation method of the coal gangue sandstone sponge brick as claimed in claim 5, wherein in S2, the firing mode is as follows: firstly, from room temperature to 900 ℃, the heating rate is 10 ℃/min, and the temperature is kept for 30 min; and then, continuously heating to the firing temperature of 1120-1180 ℃, keeping the temperature for 30min at the heating rate of 10 ℃/min, and cooling to the room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111216438.XA CN113816724B (en) | 2021-10-19 | 2021-10-19 | Coal gangue sandstone sponge brick and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111216438.XA CN113816724B (en) | 2021-10-19 | 2021-10-19 | Coal gangue sandstone sponge brick and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113816724A true CN113816724A (en) | 2021-12-21 |
| CN113816724B CN113816724B (en) | 2022-09-23 |
Family
ID=78917089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111216438.XA Active CN113816724B (en) | 2021-10-19 | 2021-10-19 | Coal gangue sandstone sponge brick and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113816724B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114890808A (en) * | 2022-05-19 | 2022-08-12 | 景德镇陶瓷大学 | Preparation method of coal gangue sponge brick with sandwich structure |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104557120A (en) * | 2015-01-12 | 2015-04-29 | 甘肃万特科技发展有限公司 | Method for preparing foamed ceramic |
| CN106187092A (en) * | 2016-09-08 | 2016-12-07 | 河海大学 | A kind of method utilizing mud and mud to fire sponge brick |
| CN106747619A (en) * | 2016-11-30 | 2017-05-31 | 太原理工大学 | Sintered coal gangue expanded perlite water-permeable brick and preparation method thereof |
| CN107098683A (en) * | 2017-06-23 | 2017-08-29 | 李珠 | Sintered coal gangue insulating brick and preparation method thereof |
| CN107434430A (en) * | 2017-08-29 | 2017-12-05 | 贵州欧玛陶瓷有限责任公司 | Water-permeable brick and its preparation technology |
| CN107827438A (en) * | 2017-12-04 | 2018-03-23 | 李珠 | Gangue warming plate and preparation method thereof |
| CN108863431A (en) * | 2018-06-28 | 2018-11-23 | 山西省玻璃陶瓷科学研究所（有限公司） | A kind of removal refrigerator peculiar smell foam pottery and preparation method |
| CN110526737A (en) * | 2019-09-05 | 2019-12-03 | 中国地质调查局沈阳地质调查中心 | A kind of bastard coal ground mass slug type water-permeable brick and preparation method thereof |
| CN111499230A (en) * | 2020-04-28 | 2020-08-07 | 安徽盘景水泥有限公司 | Coal gangue solid waste material as raw material admixture |
-
2021
- 2021-10-19 CN CN202111216438.XA patent/CN113816724B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104557120A (en) * | 2015-01-12 | 2015-04-29 | 甘肃万特科技发展有限公司 | Method for preparing foamed ceramic |
| CN106187092A (en) * | 2016-09-08 | 2016-12-07 | 河海大学 | A kind of method utilizing mud and mud to fire sponge brick |
| CN106747619A (en) * | 2016-11-30 | 2017-05-31 | 太原理工大学 | Sintered coal gangue expanded perlite water-permeable brick and preparation method thereof |
| CN107098683A (en) * | 2017-06-23 | 2017-08-29 | 李珠 | Sintered coal gangue insulating brick and preparation method thereof |
| CN107434430A (en) * | 2017-08-29 | 2017-12-05 | 贵州欧玛陶瓷有限责任公司 | Water-permeable brick and its preparation technology |
| CN107827438A (en) * | 2017-12-04 | 2018-03-23 | 李珠 | Gangue warming plate and preparation method thereof |
| CN108863431A (en) * | 2018-06-28 | 2018-11-23 | 山西省玻璃陶瓷科学研究所（有限公司） | A kind of removal refrigerator peculiar smell foam pottery and preparation method |
| CN110526737A (en) * | 2019-09-05 | 2019-12-03 | 中国地质调查局沈阳地质调查中心 | A kind of bastard coal ground mass slug type water-permeable brick and preparation method thereof |
| CN111499230A (en) * | 2020-04-28 | 2020-08-07 | 安徽盘景水泥有限公司 | Coal gangue solid waste material as raw material admixture |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114890808A (en) * | 2022-05-19 | 2022-08-12 | 景德镇陶瓷大学 | Preparation method of coal gangue sponge brick with sandwich structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113816724B (en) | 2022-09-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107602072B (en) | A kind of water-permeable brick and preparation method thereof based on graphene and solid-state castoff | |
| CN101186519B (en) | Porous ceramic material and preparation method thereof | |
| CN103172347B (en) | Sintered porous light-weight insulating brick produced from ceramic waste mud and manufacturing method thereof | |
| CN103755322B (en) | Low-silica iron ore tailings expanded ceramsite and preparation method thereof | |
| CN102795831B (en) | Deep foundation pit soil-sintered porous brick and production method thereof | |
| CN104944862B (en) | Energy-saving wall material produced by using construction solid wastes and producing method of wall material | |
| CN105016710B (en) | The method that haydite is prepared using sludge at low temperature sintering | |
| CN102417368A (en) | Foam ceramic manufactured by high-silicon iron tailings and manufacture method thereof | |
| CN104529518B (en) | A kind of lead-zinc ore tailings-red mud-fly ash base foamed ceramics and preparation method thereof | |
| CN112552072A (en) | Construction waste regenerated foamed ceramic and preparation method thereof | |
| CN109665814A (en) | A method of gradient pore water-permeable brick is manufactured using ceramic solid waste | |
| CN101948285A (en) | Calcium silicate material prepared from waste ceramic powder and preparation method thereof | |
| CN105130391A (en) | Method of preparing light-weight ceramic granules by sintering lake-bottom mud and municipal sludge | |
| CN113816724B (en) | Coal gangue sandstone sponge brick and preparation method thereof | |
| CN105503051A (en) | Water-permeable brick prepared from slag generated in refuse incineration and preparation method of water-permeable brick | |
| CN105060743A (en) | Cement material prepared from waste tile powder | |
| CN104496433B (en) | It is a kind of using Tungsten tailing as high-strength ceramic of primary raw material and preparation method thereof | |
| CN103755379B (en) | Method of preparing foamed air brick by taking iron tailings as main material | |
| CN106938895A (en) | A kind of method that lateritic nickel ore acid-soaked waste residue produces building porcelain granule | |
| CN108911726A (en) | A kind of gangue-permeable Ceramic Tiles of desulfurized gypsum-calcium carbonate system and preparation method thereof | |
| Xie et al. | Utilization of waterworks sludge in the production of fired/unfired water permeable bricks | |
| CN111732396A (en) | Alkali-activated vertical anti-seepage material and preparation method thereof | |
| CN115073090B (en) | Anti-shrinkage construction waste stable road base material and application thereof | |
| CN114262209A (en) | Light anti-static ceramic tile and preparation method thereof | |
| CN105837144A (en) | Non-bearing deposited-silt autoclaved sand-lime brick and preparation method thereof |
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 |