CN115231889A - Baking-free ceramsite prepared from sludge incineration waste residues and preparation method thereof - Google Patents
Baking-free ceramsite prepared from sludge incineration waste residues and preparation method thereof Download PDFInfo
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- CN115231889A CN115231889A CN202210752672.2A CN202210752672A CN115231889A CN 115231889 A CN115231889 A CN 115231889A CN 202210752672 A CN202210752672 A CN 202210752672A CN 115231889 A CN115231889 A CN 115231889A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/24—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C1/00—Apparatus or methods for obtaining or processing clay
- B28C1/10—Apparatus or methods for obtaining or processing clay for processing clay-containing substances in non-fluid condition ; Plants
- B28C1/14—Apparatus or methods for obtaining or processing clay for processing clay-containing substances in non-fluid condition ; Plants specially adapted for homogenising, comminuting or conditioning clay in non-fluid condition or for separating undesired admixtures therefrom
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C1/00—Apparatus or methods for obtaining or processing clay
- B28C1/10—Apparatus or methods for obtaining or processing clay for processing clay-containing substances in non-fluid condition ; Plants
- B28C1/14—Apparatus or methods for obtaining or processing clay for processing clay-containing substances in non-fluid condition ; Plants specially adapted for homogenising, comminuting or conditioning clay in non-fluid condition or for separating undesired admixtures therefrom
- B28C1/18—Apparatus or methods for obtaining or processing clay for processing clay-containing substances in non-fluid condition ; Plants specially adapted for homogenising, comminuting or conditioning clay in non-fluid condition or for separating undesired admixtures therefrom for comminuting clay lumps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C1/00—Apparatus or methods for obtaining or processing clay
- B28C1/10—Apparatus or methods for obtaining or processing clay for processing clay-containing substances in non-fluid condition ; Plants
- B28C1/14—Apparatus or methods for obtaining or processing clay for processing clay-containing substances in non-fluid condition ; Plants specially adapted for homogenising, comminuting or conditioning clay in non-fluid condition or for separating undesired admixtures therefrom
- B28C1/20—Apparatus or methods for obtaining or processing clay for processing clay-containing substances in non-fluid condition ; Plants specially adapted for homogenising, comminuting or conditioning clay in non-fluid condition or for separating undesired admixtures therefrom for separating undesired admixed bodies, e.g. stones
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/003—Methods for mixing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/0007—Pretreatment of the ingredients, e.g. by heating, sorting, grading, drying, disintegrating; Preventing generation of dust
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/10—Burned or pyrolised refuse
-
- 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
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Dispersion Chemistry (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
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- Mechanical Engineering (AREA)
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- Hydrology & Water Resources (AREA)
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Abstract
The invention provides a non-fired ceramsite prepared from sludge incineration waste residues and a preparation method thereof, wherein the non-fired ceramsite comprises the following components in parts by mass: 20-30 parts of sludge incineration waste residue particles, 25-35 parts of sludge incineration waste residue powder, 25-35 parts of cement, 3-6 parts of quicklime, 3-9 parts of a binder and 0.5-1.0 part of calcium sulfate; the preparation method comprises the following steps: taking sludge incineration waste residue particles in sludge incineration equipment, cooling one part of the sludge incineration waste residue particles for later use, cooling and drying the other part of the sludge incineration waste residue particles, crushing the cooled part of the sludge incineration waste residue particles, and sieving the crushed part of the sludge incineration waste residue particles to obtain sludge incineration waste residue powder; sequentially adding the raw materials into a container, stirring and mixing, adding water, and continuously stirring and uniformly mixing to obtain mixed slurry; transferring the mixed slurry into a granulator, and granulating to obtain semi-finished granules; and (4) maintaining the semi-finished granular materials in a steamer at normal pressure, taking out, continuously spraying water, maintaining for 2-3 days, and drying. The baking-free ceramsite disclosed by the invention is high in hardness, multiple in pores and good in adsorbability.
Description
Technical Field
The invention belongs to the field of building materials, and particularly relates to a non-fired ceramsite prepared from sludge incineration waste residues and a preparation method thereof.
Background
Sludge incineration waste residues are residues generated by high-temperature incineration of municipal sludge, contain a large amount of silicon dioxide, aluminum oxide and calcium oxide, are potential chemical resources, and the sustainable development of the sludge incineration technology is determined by resource utilization of the sludge incineration waste residues. The sludge incineration waste residue can be used for preparing ceramsite, in particular to adsorptive ceramsite specially used for water treatment; after the sludge generated in the sewage treatment process is subjected to incineration treatment, the sludge is prepared into ceramsite which is then returned to the sewage treatment stage for use, so that the purposes of treating waste by waste and recycling resources are achieved.
The existing ceramsite production usually adopts raw materials such as pottery clay and cement, and the ceramsite can be used for sewage treatment only by roasting treatment, so that the ceramsite preparation process is complex and the cost is high.
Disclosure of Invention
The invention aims to provide a non-fired ceramsite prepared from sludge incineration waste residues and a preparation method thereof, and aims to solve the problems of complex production process and high cost of the conventional ceramsite.
In order to achieve the above purpose, the invention provides the following technical scheme:
the non-fired ceramsite prepared from the sludge incineration waste residues comprises the following raw materials in parts by weight: 20-30 parts of sludge incineration waste residue particles, 25-35 parts of sludge incineration waste residue powder, 25-35 parts of cement, 3-6 parts of quicklime, 3-9 parts of a binder and 0.5-1.0 part of calcium sulfate.
Preferably, the non-fired ceramsite prepared by using the sludge incineration waste residues also comprises one or two of silica fume and diatomite;
preferably, the baking-free ceramsite also comprises 2-4 parts of silica fume and 3-7 parts of diatomite.
Preferably, the non-sintered ceramsite prepared by using the sludge incineration waste residue also comprises one or two of triethanolamine and sodium sulfite;
preferably, the baking-free ceramsite also comprises 0.02-0.05 part of triethanolamine and 0.5-1.0 part of sodium sulfite.
In the non-fired ceramsite prepared by using the sludge incineration waste residue, preferably, the binder comprises one or a mixture of sodium carboxymethylcellulose and sodium silicate;
preferably, the binder comprises 2-5 parts of sodium carboxymethyl cellulose and 1-4 parts of sodium silicate.
Preferably, the cement is portland cement, and the non-sintered ceramsite is prepared by utilizing the sludge incineration waste residues.
Preferably, the particle size of the sludge incineration waste residue particles is 2-3mm in the non-fired ceramsite prepared by using the sludge incineration waste residue.
In the baking-free ceramsite prepared by using the sludge incineration waste residue, preferably, the particle size of the sludge incineration waste residue powder is less than 0.2mm.
A preparation method of baking-free ceramsite comprises the following steps:
taking sludge incineration waste residue particles in sludge incineration equipment, cooling one part of the sludge incineration waste residue particles for later use, cooling and drying the other part of the sludge incineration waste residue particles, crushing the cooled part of the sludge incineration waste residue particles, and sieving the crushed part of the sludge incineration waste residue particles to obtain sludge incineration waste residue powder for later use;
step two, sequentially adding the raw materials of the non-sintered ceramsite into a container according to the proportion, stirring and mixing, adding water, and continuously stirring and mixing uniformly to obtain mixed slurry;
transferring the mixed slurry into a granulator, and performing granulation production to obtain semi-finished granules;
and step four, curing the semi-finished granular materials in a steam engine at normal pressure, taking out, continuously spraying water for curing for 2-3 days, and drying to obtain the baking-free ceramsite.
In the preparation method of the baking-free ceramsite, the curing temperature is preferably 70-100 ℃, and the curing time is preferably 4-8h;
preferably, the adding amount of the water in the second step is 20-40% of the total mass of the raw materials of the baking-free ceramsite.
In the above-mentioned preparation method of non-sintered ceramsite, preferably, in step three, the particle size of the semi-finished granules is 5-15mm.
Has the advantages that:
the invention provides a method for preparing non-sintered ceramsite by using sludge incineration waste residues, which can reduce the cost of raw materials of ceramsite and realize the production of low-cost ceramsite by using the sludge incineration waste residues as the raw materials for ceramsite production, and the production process of the ceramsite does not need high-temperature roasting, so that the production cost and the process are simpler, more convenient and faster.
The main raw materials of the invention are from sludge incineration waste residues, and various auxiliary materials are added for blending, so that the prepared non-fired ceramsite has high hardness, more pores and good adsorbability, can be used for sewage treatment, has wide raw material sources, is simple in preparation method, and can realize resource utilization of the sludge incineration waste residues.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
The present invention will be described in detail with reference to examples. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention provides a non-fired ceramsite prepared from sludge incineration waste residues, which comprises the following raw materials in parts by weight: 20-30 parts (such as 22 parts, 24 parts, 26 parts and 28 parts) of sludge incineration waste residue particles, 25-35 parts (such as 26 parts, 28 parts, 30 parts, 32 parts and 34 parts) of sludge incineration waste residue powder, 25-35 parts (such as 26 parts, 28 parts, 30 parts, 32 parts and 34 parts) of cement, 3-6 parts (such as 3.5 parts, 4 parts, 4.5 parts, 5 parts and 5.5 parts) of quicklime, 3-9 parts (such as 4 parts, 5 parts, 6 parts, 7 parts and 8 parts) of a binder, and 0.5-1.0 part (such as 0.6 part, 0.7 part, 0.8 part and 0.9 part) of calcium sulfate.
The sodium sulfite in the present invention is preferably anhydrous sodium sulfite.
The calcium sulfate is used as an accelerant, the hydration speed of cement can be reduced, the strength of the ceramsite is increased, and the false coagulation or rapid coagulation phenomenon can be caused by adding too much or too little calcium sulfate.
In the specific embodiment of the invention, the non-sintered ceramsite also comprises one or two of silica fume and diatomite; preferably, the silica fume is 2-4 parts (such as 2.5 parts, 3 parts, 3.5 parts and 4 parts) and the diatomite is 3-7 parts (such as 3.5 parts, 4 parts, 4.5 parts, 5 parts, 5.5 parts, 6 parts and 6.5 parts).
The silica fume can increase the content of silica in the ceramsite, enhance the strength and hardness of the ceramsite, and increase the pressure resistance, the crack resistance and the wear resistance. The diatomite can also increase the content of silicon dioxide in the ceramsite, and is amorphous silicon dioxide, and the diatomite is light and porous, and can increase the water absorption of the ceramsite and the pores of the ceramsite when added into the mixture. However, the conditions of large mud content, fragile ceramsite and insufficient strength can occur when the diatomite is added too much, so that the addition amount of the diatomite needs to be within a certain range.
In the specific embodiment of the invention, the non-sintered ceramsite also comprises one or two of triethanolamine and sodium sulfite; preferably, the baking-free ceramsite also comprises 0.02-0.05 part of triethanolamine (such as 0.03 part and 0.04 part), and 0.5-1.0 part of sodium sulfite (such as 0.6 part, 0.7 part, 0.8 part and 0.9 part). Triethanolamine and sodium sulfite can improve the compressive strength of sludge incineration waste residue powder-cement in early and later stages to different degrees, shorten the setting time, and increase the contents of gel and ettringite crystals in hydration products after the triethanolamine and the sodium sulfite are added, thereby improving the strength of ceramsite.
In a specific embodiment of the invention, the binder comprises one or a mixture of sodium carboxymethylcellulose and sodium silicate; preferably, the binder comprises 2-5 parts (such as 2.5 parts, 3 parts, 3.5 parts, 4 parts and 4.5 parts) of sodium carboxymethyl cellulose and 1-4 parts (such as 2 parts, 2.5 parts, 3 parts, 3.5 parts and 4 parts) of sodium silicate, and the binder can be added to increase the cohesiveness among various raw materials, promote the raw materials to agglomerate and form balls and facilitate the granulation process. However, the binder is added too much, so that the loss on ignition of the ceramsite is too large.
In a particular embodiment of the invention, the cement is portland cement.
In the specific embodiment of the invention, the particle size of the sludge incineration waste residue particles is 2-3mm (such as 2.2mm, 2.4mm, 2.6mm and 2.8 mm), and the sludge incineration waste residue particles are irregular particles. The grain diameter of the sludge incineration residue powder is less than 0.2mm. Preferably, the particle size of the sludge incineration residue powder is less than 0.17mm.
The composition of the sludge incineration waste residue particles and the sludge incineration waste residue powder is adopted in the invention, because the porosity of the ceramsite can be increased by adopting the sludge incineration waste residue particles, and the viscosity of the mixture can be increased by adopting the sludge incineration waste residue powder, so that the mixture is easy to agglomerate, and the granulation process is facilitated. The excessive particle size of the sludge incineration residue powder is not beneficial to conglomerating the mixture. The amount of the sludge incineration waste residue powder is slightly higher than that of sludge incineration waste residue particles, so that complete-granularity and complete-shape ceramsite can be finally formed.
The quicklime can improve the strength of the ceramsite and improve the condensation speed of the material.
The invention also provides a preparation method of the non-sintered ceramsite, which comprises the following steps:
taking sludge incineration waste residue particles in sludge incineration equipment, cooling one part of the sludge incineration waste residue particles for later use, cooling and drying the other part of the sludge incineration waste residue particles, crushing the cooled part of the sludge incineration waste residue particles, and sieving the cooled part of the sludge incineration waste residue particles through a 80-mesh sieve to obtain sludge incineration waste residue powder for later use;
step two, sequentially adding the raw materials of the non-sintered ceramsite into a container according to the proportion, stirring and mixing, adding water, and continuously stirring and mixing uniformly to obtain mixed slurry;
transferring the mixed slurry into a granulator, and performing granulation production to obtain semi-finished granules;
and step four, curing the semi-finished granules in a steamer under normal pressure, taking out, continuously spraying water for curing for 2-3 days, and drying to obtain the baking-free ceramsite.
The non-sintered ceramsite disclosed by the invention can be more fully hydrated by virtue of long-time steam curing and moisture spraying curing, and if the non-sintered ceramsite directly taken out from a steam machine without moisture spraying curing is dried, the non-sintered ceramsite is easy to break or ash, and the strength is insufficient, so that the non-sintered ceramsite is not beneficial to sewage treatment application.
In the embodiment of the invention, the amount of water added in the second step is 20-40% (such as 22%, 24%, 26%, 28%, 30%, 32%, 34%, 36%, 38%, 40%) of the total mass of the raw materials of the unfired ceramsite. The amount of water added affects the dry and wet state of the mixed slurry, which in turn affects the ease of agglomeration in the granulator. Therefore, the water addition amount needs to be controlled within a certain range, so that the dryness and humidity of the mixed slurry are appropriate.
The curing temperature in the fourth step is 70-100 deg.C (such as 75 deg.C, 80 deg.C, 85 deg.C, 90 deg.C, 95 deg.C, 100 deg.C), and the curing time is 4-8h (such as 5h, 6h, 7h, 8 h); the curing time can be adjusted according to the quantity or size of the ceramsite, and when the ceramsite is larger or the quantity of the ceramsite is larger, the curing time can be increased. The steam curing is adopted, so that the cement, sludge incineration waste residue and other components in the ceramsite can fully react and fully hydrate, and the effect of solidifying and hardening the ceramsite is achieved.
In the specific embodiment of the invention, in the third step, the particle size of the semi-finished product particles is 5-15mm (such as 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14 mm), that is, the particle size of the finally prepared baking-free ceramsite is also 5-15mm.
The mineral components and chemical components of the sludge incineration waste residue adopted in the invention are shown in table 1:
TABLE 1 mineral composition and chemical composition of sludge incineration residue
Example 1
The non-fired ceramsite prepared from sludge incineration waste residues comprises the following components in parts by weight:
25 parts of sludge incineration waste residue particles, 30 parts of sludge incineration waste residue powder, 30 parts of portland cement, 3 parts of quick lime, 5 parts of diatomite, 3 parts of silica fume, 2 parts of sodium carboxymethylcellulose, 2 parts of sodium silicate, 0.03 part of triethanolamine, 0.5 part of anhydrous sodium sulfite and 0.5 part of calcium sulfate.
The particle size of the sludge incineration waste residue particles is 2-3mm, and the particle size of the sludge incineration waste residue powder is less than 0.2mm.
The preparation method of the baking-free ceramsite in the embodiment is as follows:
taking sludge incineration waste residues in sludge incineration equipment, cooling one part of the sludge incineration waste residues for later use, cooling and drying the other part of the sludge incineration waste residues, crushing the cooled part of the sludge incineration waste residues, and sieving the crushed part of the sludge incineration waste residues through a 80-mesh sieve to obtain sludge incineration waste residue powder for later use.
And step two, sequentially adding the raw materials into a mixing container according to the proportion, uniformly stirring and mixing, adding water accounting for 30% of the total mass of the raw materials, and fully stirring and mixing to obtain mixed slurry.
And step three, transferring the mixed slurry to a granulator, granulating to bond the raw materials into balls, wherein the particle size of the balls is 5-15mm, and taking out to obtain semi-finished product particles.
Step four, carrying out steam machine curing on the semi-finished product particles at the normal pressure of 80 ℃ for 5 hours, then taking out the ceramsite, and continuously spraying water for curing for 2 days; drying to obtain the prepared non-sintered ceramsite.
The non-fired ceramsite prepared in the embodiment is subjected to performance test, and the performance test method refers to GB/T17431.2-2010 light aggregate and test method-part 2 to test the performances of bulk density, apparent density, water absorption, mud content, boiling mass loss and ignition loss. The performance data are shown in table 2 below.
Example 2
The difference between this example and example 1 is that the raw material components are different, and the other method steps are the same as example 1, and are not described herein again.
The non-sintered ceramsite in the embodiment comprises the following components:
20 parts of sludge incineration waste residue particles, 30 parts of sludge incineration waste residue powder, 30 parts of portland cement, 3 parts of quick lime, 3 parts of diatomite, 3 parts of silica fume, 2 parts of sodium carboxymethylcellulose, 4 parts of sodium silicate, 0.03 part of triethanolamine, 0.5 part of anhydrous sodium sulfite and 0.5 part of calcium sulfate.
The unfired ceramsite prepared in the present example was subjected to a performance test, which was performed in the same manner as in example 1, and the performance data is shown in table 2 below.
Example 3
The difference between this example and example 1 is that the raw material components are different, and the other method steps are the same as example 1, and are not described herein again.
The non-sintered ceramsite in the embodiment comprises the following components:
20 parts of sludge incineration waste residue particles, 30 parts of sludge incineration waste residue powder, 28 parts of portland cement, 6 parts of quick lime, 7 parts of diatomite, 4 parts of silica fume, 3 parts of sodium carboxymethylcellulose, 4 parts of sodium silicate, 0.02 part of triethanolamine, 1.0 part of anhydrous sodium sulfite and 1.0 part of calcium sulfate.
The unfired ceramsite prepared in the present example was subjected to a performance test, which was performed in the same manner as in example 1, and the performance data is shown in table 2 below.
Example 4
The difference between this embodiment and embodiment 1 is that the step four in the preparation method is different, and the other method steps are the same as embodiment 1, and are not described herein again.
The baking-free ceramsite in the embodiment is cured in a steamer at normal pressure, the curing temperature is 70 ℃, and the curing time is 8 hours.
The unfired ceramsite prepared in the present example is subjected to a performance test, the performance test method is the same as that of example 1, and the performance data is shown in the following table 2.
Comparative example 1
The difference between this comparative example and example 1 is that sludge incineration powder was not added, and the other process steps are the same as example 1 and will not be described again.
The performance test method of the unfired ceramsite prepared in the comparative example is the same as that of example 1, and the performance data are shown in the following table 2.
Comparative example 2
The difference between the comparative example and the example 1 is that the components of part of the raw materials are different: 15 parts of sludge incineration waste residue particles, 20 parts of sludge incineration waste residue powder, 50 parts of portland cement, and other raw material components and method steps are the same as those in example 1, and are not described again.
The performance test method of the unfired ceramsite prepared in the comparative example is the same as that of example 1, and the performance data are shown in the following table 2.
Comparative example 3
The difference between this comparative example and example 1 is that part of the raw materials are not added with silica fume and diatomaceous earth, and other raw material components and method steps are the same as those in example 1, and are not described again.
The non-fired ceramsite prepared in the comparative example is subjected to a performance test, the performance test method is the same as that of example 1, and the performance data is shown in the following table 2.
The performance test method of the unfired ceramsite prepared in the comparative example is the same as that of example 1, and the performance data are shown in the following table 2.
Comparative example 4
The difference between this comparative example and example 1 is that triethanolamine and anhydrous sodium sulfite are not added to part of the raw materials, and the other raw material components and method steps are the same as those in example 1 and are not described again.
The performance test method of the unfired ceramsite prepared in the comparative example is the same as that of example 1, and the performance data are shown in the following table 2.
Comparative example 5
The difference between this comparative example and example 1 is that in the fourth step of the preparation method, after the semi-finished product particles are taken out from the steam engine, the semi-finished product particles are directly dried to obtain the non-fired ceramsite, and the other raw material components and the method steps are the same as those in example 1, and are not described again here.
In the comparative example, a part of the non-sintered ceramsite obtained after drying is crushed, and cannot be applied to sewage treatment.
TABLE 2 Property data of non-fired ceramic grains prepared in examples and comparative examples
In conclusion: the invention provides a method for preparing non-sintered ceramsite by using sludge incineration waste residues, which uses the sludge incineration waste residues as raw materials for ceramsite production, can reduce the cost of the raw materials of the ceramsite, realizes low-cost ceramsite production, does not need high-temperature roasting in the production process of the ceramsite, and has simpler, more convenient and faster manufacturing cost and process.
The main raw materials of the invention are from sludge incineration waste residues, and various auxiliary materials are added for mixing, so that the prepared non-fired ceramsite has high hardness, multiple pores and good adsorptivity, can be used for sewage treatment, has wide raw material sources and simple preparation method, and can realize resource utilization of the sludge incineration waste residues.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The non-fired ceramsite prepared from the sludge incineration waste residues is characterized by comprising the following raw materials in parts by weight: 20-30 parts of sludge incineration waste residue particles, 25-35 parts of sludge incineration waste residue powder, 25-35 parts of cement, 3-6 parts of quicklime, 3-9 parts of a binder and 0.5-1.0 part of calcium sulfate.
2. The non-fired ceramsite prepared by using the sludge incineration waste residue as recited in claim 1, wherein said non-fired ceramsite further comprises one or a mixture of silica fume and diatomite;
preferably, the baking-free ceramsite also comprises 2-4 parts of silica fume and 3-7 parts of diatomite.
3. The non-fired ceramsite prepared by using the sludge incineration residue as defined in claim 1, wherein the non-fired ceramsite further comprises one or a mixture of triethanolamine and sodium sulfite;
preferably, the baking-free ceramsite also comprises 0.02-0.05 part of triethanolamine and 0.5-1.0 part of sodium sulfite.
4. The non-fired ceramsite prepared by using the sludge incineration residue as defined in claim 3, wherein the binder comprises one or a mixture of two of sodium carboxymethylcellulose and sodium silicate;
preferably, the binder comprises 2-5 parts of sodium carboxymethyl cellulose and 1-4 parts of sodium silicate.
5. The non-fired ceramsite prepared by using the sludge incineration waste residue as recited in claim 1, wherein said cement is portland cement.
6. The non-fired ceramsite prepared by using the sludge incineration residue as recited in claim 1, wherein said sludge incineration residue particles have a particle size of 2-3mm.
7. The non-fired ceramsite prepared by using the sludge incineration residue as defined in claim 1, wherein the particle size of the sludge incineration residue powder is less than 0.2mm.
8. The preparation method of baking-free ceramsite according to any one of claims 1-7, wherein the preparation method comprises the following steps:
taking sludge incineration waste residue particles in sludge incineration equipment, cooling one part of the sludge incineration waste residue particles for later use, cooling and drying the other part of the sludge incineration waste residue particles, crushing the cooled part of the sludge incineration waste residue particles, and sieving the crushed part of the sludge incineration waste residue particles to obtain sludge incineration waste residue powder for later use;
step two, sequentially adding the raw materials of the non-sintered ceramsite into a container according to the proportion, stirring and mixing, adding water, and continuously stirring and uniformly mixing to obtain mixed slurry;
transferring the mixed slurry into a granulator, and carrying out granulation production to obtain semi-finished granules;
and step four, curing the semi-finished granular materials in a steam engine at normal pressure, taking out, continuously spraying water for curing for 2-3 days, and drying to obtain the baking-free ceramsite.
9. The method for preparing baking-free ceramsite as recited in claim 8, wherein the curing temperature is 70-100 ℃, and the curing time is 4-8h;
preferably, the adding amount of the water in the second step is 20-40% of the total mass of the raw materials of the baking-free ceramsite.
10. The method for preparing baking-free ceramsite according to claim 8 or 9, wherein in the third step, the particle size of the semi-finished granular material is 5-15mm.
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