CN113072360B - Light ceramsite sand and preparation method thereof - Google Patents

Light ceramsite sand and preparation method thereof Download PDF

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Publication number
CN113072360B
CN113072360B CN202110395228.5A CN202110395228A CN113072360B CN 113072360 B CN113072360 B CN 113072360B CN 202110395228 A CN202110395228 A CN 202110395228A CN 113072360 B CN113072360 B CN 113072360B
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sand
ceramsite sand
solid waste
industrial
making solid
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CN113072360A (en
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钱文飞
柴文斌
孔作帆
吴鑫军
严军
邱以勒
陈锋
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Hangzhou Aoxing Zhuyou Technology Co ltd
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Hangzhou Aoxing Zhuyou Technology Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
    • C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
    • 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
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
    • C04B2235/422—Carbon
    • 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
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
    • C04B2235/448—Sulphates or sulphites
    • 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
    • C04B2235/74—Physical characteristics
    • C04B2235/77—Density
    • 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
    • C04B2235/95—Products characterised by their size, e.g. microceramics
    • 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
    • C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Abstract

The invention discloses light ceramsite sand and a preparation method thereof, wherein the light ceramsite sand comprises the following components in percentage by weight: 80-95% of industrial sand-making solid waste wet material, 3-10% of sodium sulfate or magnesium oxide, 1-5% of coal gangue or carbon, 0.5-5% of binder and 0.2-2% of surfactant. The light ceramsite sand is prepared by kneading, granulating and roasting processes. According to the invention, the industrial sand-making solid waste wet material is effectively recycled, so that the problems of quantitative treatment, environmental pollution, stacking and the like of industrial solid waste are effectively solved while resource waste is reduced, the problem of excessive exploitation of natural ore is solved, resource utilization is realized, waste is changed into wealth, and the production cost of ceramsite sand is reduced.

Description

Light ceramsite sand and preparation method thereof
Technical Field
The invention belongs to the technical field of recycling of industrial solid wastes, and particularly relates to light ceramsite sand and a preparation method thereof.
Background
In the industrial machine-made sand production line, a lot of broken sand and mud exist, and the broken sand and mud can not be processed and applied to machine-made sand finished products and become industrial solid wastes. The main treatment of industrial solid waste is stacking or landfill. However, some components are complex, and the soil and the environment are polluted to a certain extent after the landfill. Contamination is increasingly severe as the amount of time accumulates. Therefore, research on the treatment of such solid wastes is necessary.
The ceramsite sand is one kind of artificial aggregate, has the characteristics of light weight, shock resistance, good insulation (heat preservation, heat insulation, sound insulation, moisture insulation) and the like due to small stacking density, porous inside, uniform shape and components and certain strength and firmness, and is widely applied to the departments of building, metallurgy, chemical industry, petroleum, agriculture and the like. The conventional ceramsite sand is prepared from natural ores such as clay, bauxite, slate, shale and the like, wherein the Chinese patent CN109517593A reports that the ceramsite sand uses raw aluminum ore as a main raw material, and the Chinese patent CN110590393A reports that the bauxite is used as a main raw material. As the application amount of the ceramsite sand is increased, excessive natural ore exploitation is caused, resources are in short supply, and the development cannot be continued.
The ceramsite sand is one of ceramsite products, the ceramsite sand with the particle size of more than 5mm is called ceramsite, the ceramsite sand with the particle size of less than 5mm is called ceramsite sand, the price of the ceramsite sand is higher than that of the ceramsite sand, the preparation of the ceramsite sand at the present stage mainly depends on sieving and screening, and the working procedures are complicated.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide light ceramsite sand prepared by taking industrial sand-making solid waste wet materials as main raw materials and a preparation method thereof.
The invention is realized by the following technical scheme:
the light ceramsite sand is characterized in that the light ceramsite sand takes industrial sand making solid waste wet materials as main raw materials, and specifically comprises the following components in percentage by weight: 80-95% of industrial sand-making solid waste wet material, 3-10% of sodium sulfate or magnesium oxide, 1-5% of coal gangue or carbon, 0.5-5% of binder and 0.2-2% of surfactant. When the content of the industrial sand-making solid waste wet material is lower than 80%, other raw materials are required to supplement to finally prepare the light ceramsite sand, the cost is high, and when the content is higher than 95%, the foaming is insufficient in the preparation process, so that the preparation cannot be completed.
The light ceramsite sand is characterized in that the moisture content of the industrial sand-making solid waste wet material is 15-25%.
The light ceramsite sand is characterized in that the binder is any one of polyacrylamide, flavonoid glue and hydroxymethyl cellulose.
The light ceramsite sand is characterized in that the surfactant is alpha-sodium alkenyl sulfonate.
The preparation method of the light ceramsite sand is characterized by comprising the following steps of:
1) Weighing industrial sand making solid waste wet material with water content of 15-25%, sodium sulfate or magnesium oxide, coal gangue or carbon, binder and surfactant in proportion, adding into a kneader, kneading and stirring uniformly, and gradually forming small spherulites with particle size of 1-5mm along with the kneading process to complete granulation;
2) Placing the granulated small pellets into a high-temperature rotary kiln for roasting, controlling the sintering temperature to be 1100-1200 ℃, preserving the heat for 20-30 minutes, and finishing sintering;
3) And naturally cooling after leaving the cellar to finish the preparation of the light ceramsite sand.
The preparation method of the light ceramsite sand is characterized in that the kneading time in the step 1) is 15-60min.
According to the invention, the industrial sand-making solid waste wet material is effectively recycled, so that the problems of quantitative treatment, environmental pollution, stacking and the like of industrial solid waste are effectively solved while resource waste is reduced, the problem of excessive exploitation of natural ore is solved, resource utilization is realized, waste is changed into wealth, and the production cost of ceramsite sand is reduced.
Detailed Description
The present invention will be described in further detail with reference to specific examples to better understand the technical solution.
The invention relates to light ceramsite sand, which specifically comprises the following components in percentage by weight: 80-95% of industrial sand-making solid waste wet material, 3-10% of sodium sulfate or magnesium oxide, 1-5% of coal gangue or carbon, 0.5-5% of binder and 0.2-2% of surfactant. Wherein, the moisture content of the industrial sand-making solid waste wet material is between 15 and 25 percent, the binder is any one of polyacrylamide, flavonoid glue and hydroxymethyl cellulose, and the surfactant is alpha-alkenyl sodium sulfonate.
Example 1
Weighing 95% of industrial sand-making solid waste wet material (dry basis) with the water content of 15-25%, 3% of sodium sulfate, 1% of coal gangue, 0.5% of polyacrylamide and 0.5% of alpha-sodium alkenyl sulfonate in proportion, putting the materials into a kneader, kneading and stirring uniformly for 15-60min, gradually forming independent small spheres along with the kneading process, then placing the small spheres into a high-temperature rotary kiln for roasting, controlling the sintering temperature to be 1100-1200 ℃, preserving heat for 20-30 min, and after the sintering is finished, taking out the kiln and naturally cooling to finish the preparation of the light ceramsite.
The ceramsite sand prepared by the method has the particle size of 0.25-2mm and the bulk density of about 620kg/m 3 The thermal conductivity coefficient is 0.11-0.15W/(m.K).
Example 2
Weighing 90% of industrial sand-making solid waste wet material (dry basis) with the water content of 15-25%, 7% of sodium sulfate, 1% of carbon, 1% of polyacrylamide and 1% of alpha-sodium alkenyl sulfonate in proportion, putting the materials into a kneader, kneading and stirring uniformly for 15-60min, gradually forming independent small spheres with the kneading process, then putting the small spheres into a high-temperature rotary kiln for roasting, controlling the sintering temperature to be 1100-1200 ℃, preserving heat for 20-30 min, and after the sintering is finished, taking the small spheres out of the kiln and naturally cooling to finish the preparation of the light ceramsite sand.
The ceramsite sand prepared by the embodiment has the particle size of 0.5-3mm and the bulk density of 550kg/m 3 The thermal conductivity coefficient is 0.12-0.15W/(m.K).
Example 3
Weighing 85% of industrial sand making solid waste wet material (dry basis) with the water content of 15-25%, 10% of magnesium oxide, 1% of carbon, 3.8% of polyacrylamide and 0.2% of alpha-alkenyl sodium sulfonate in proportion, putting the materials into a kneader, kneading and stirring uniformly for 15-60min, gradually forming independent small balls along with the kneading process, then putting the small balls into a high-temperature rotary kiln for roasting, controlling the sintering temperature to be 1100-1200 ℃, preserving heat for 20-30 min, and after the sintering is finished, taking out the kiln and naturally cooling to finish the preparation of the light ceramsite sand.
The ceramsite sand prepared by the embodiment has the particle size of 0.5-4mm and the bulk density of 500kg/m 3 The thermal conductivity coefficient is 0.12-0.14W/(m.K).
Example 4
Weighing 80% of industrial sand-making solid waste wet material (dry basis) with the water content of 15-25%, 8% of sodium sulfate, 5% of coal gangue, 5% of polyacrylamide and 2% of alpha-alkenyl sodium sulfonate in proportion, putting the materials into a kneader, kneading and stirring the materials uniformly for 15-60min, gradually forming independent small balls along with the kneading process, then putting the small balls into a high-temperature rotary kiln for roasting, controlling the sintering temperature to be 1100-1200 ℃, preserving the heat for 20-30 min, and after the sintering is finished, taking the small balls out of the kiln and naturally cooling the small balls to finish the preparation of the light ceramsite sand.
The ceramsite sand prepared by the embodiment has the particle size of 0.5-4mm and the bulk density of 460kg/m 3 The thermal conductivity coefficient is 0.12-0.14W/(m.K).
Comparative example
Weighing industrial sand-making solid waste wet material (dry basis) with water content of 91% between 15 and 25%, 7% of sodium sulfate, 1% of carbon and 1% of polyacrylamide in proportion, putting the wet material into a kneader, kneading and uniformly stirring, wherein no matter how much water is added in the kneading process, the wet material can not form a pellet shape, the wet material starts to be in a loose shape, the wet material gradually becomes a large block shape from a small block shape along with the extension of kneading time, the wet material directly enters a high-temperature rotary kiln after entering a 2 mm-aperture extrusion type granulator, the small pellets are easy to adhere during the process of conveying the pellets to the high-temperature rotary kiln, the sintering temperature is controlled to be between 1100 and 1200 ℃, the heat is preserved for 20 to 30 minutes, and the wet material is taken out of the kiln and naturally cooled after the sintering is finished.
The ceramsite sand prepared by the embodiment has the particle size of 0.5-30mm and the bulk density of 520kg/m 3 . In the comparative example, no surfactant is added, so that natural balling cannot be realized, the grain diameters of the prepared ceramsite sand are different and greatly different, strictly speaking, the ceramsite sand cannot be called as ceramsite sand, the sieving is required to be small, and the yield is extremely low.

Claims (3)

1. The light ceramsite sand is characterized by taking industrial sand-making solid waste wet materials as main raw materials, and specifically comprises the following components in percentage by weight: 80-95% of industrial sand-making solid waste wet material, 3-10% of sodium sulfate or magnesium oxide, 1-5% of coal gangue or carbon, 0.5-5% of binder and 0.2-2% of surfactant, wherein the water content of the industrial sand-making solid waste wet material is 15-25%, the surfactant is alpha-sodium alkenyl sulfonate, and the binder is any one of polyacrylamide, flavonoid glue and hydroxymethyl cellulose.
2. The lightweight ceramsite sand according to claim 1, wherein the lightweight ceramsite sand is prepared by the following steps:
1) Weighing industrial sand making solid waste wet material with water content of 15-25%, sodium sulfate or magnesium oxide, coal gangue or carbon, binder and surfactant in proportion, adding into a kneader, kneading and stirring uniformly, and gradually forming small spherulites with particle size of 1-5mm along with the kneading process to complete granulation;
2) Placing the granulated small pellets into a high-temperature rotary kiln for roasting, controlling the sintering temperature to be 1100-1200 ℃, preserving the heat for 20-30 minutes, and finishing sintering;
3) And (5) naturally cooling after leaving the cellar to finish the preparation of the light ceramsite sand.
3. The lightweight ceramsite sand according to claim 2, wherein the kneading time in step 1) is 15-60min.
CN202110395228.5A 2021-04-13 2021-04-13 Light ceramsite sand and preparation method thereof Active CN113072360B (en)

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CN113072360B true CN113072360B (en) 2022-12-20

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Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110105084A (en) * 2018-02-01 2019-08-09 广东清大同科环保技术有限公司 A kind of sintering ceramsite and preparation method thereof with water retaining function
CN109836128B (en) * 2019-03-27 2021-08-03 日昌升集团有限公司 Ceramsite produced by utilizing aggregate sandstone tailings and preparation method thereof
CN110922161A (en) * 2019-11-06 2020-03-27 成都南联科技有限公司 Method for preparing building ceramsite by using quartz sand tailings
CN110642637A (en) * 2019-11-20 2020-01-03 浙江寰龙环境科技有限公司 Ceramsite prepared from sand washing sludge and municipal sludge and preparation method thereof
CN112341237A (en) * 2020-11-11 2021-02-09 马鞍山市绿科环保科技有限公司 Method for firing light ceramsite by using waste casting resin sand

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