CN111072391A - Industrial sludge sintered ceramsite and preparation method thereof - Google Patents
Industrial sludge sintered ceramsite and preparation method thereof Download PDFInfo
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- CN111072391A CN111072391A CN201811227471.0A CN201811227471A CN111072391A CN 111072391 A CN111072391 A CN 111072391A CN 201811227471 A CN201811227471 A CN 201811227471A CN 111072391 A CN111072391 A CN 111072391A
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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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/62204—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products using waste materials or refuse
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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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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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
- 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
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/349—Clays, e.g. bentonites, smectites such as montmorillonite, vermiculites or kaolines, e.g. illite, talc or sepiolite
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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
- 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
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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
- 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
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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
- 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
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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
- 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
Abstract
The invention discloses an industrial sludge sintered ceramsite, which comprises industrial sludge powder: 60-80 parts; loess powder: 20-40 parts; fly ash: 10-20 parts; clay: 15-20 parts of a solvent; sludge: 5-10 parts; 24 parts of water. The invention also discloses a preparation method of the industrial sludge sintered ceramsite, which comprises the steps of mixing, stirring and granulating the materials and sintering raw material balls. The industrial sludge sintered ceramsite prepared by the method has excellent performance in all aspects, can recycle various industrial wastes, and has higher practical value.
Description
Technical Field
The invention relates to the field of industrial sludge treatment, in particular to the field of industrial sludge recycling, and relates to an industrial sludge ceramsite and a preparation method thereof.
Background
With the rapid development of economy in China, the number of various chemical plants, sewage plants and the like is continuously increased, the sewage amount caused by the continuous increase of the chemical plants, the sewage amount is continuously increased, a large amount of industrial sludge is generated, the industrial sludge contains a large amount of chemical components in wastewater, the direct discharge has great harm to the environment, the sludge contains various heavy metal elements, pathogenic microorganism bacteria and the like, if the industrial sludge is accumulated in a large amount, the sludge not only occupies the land area, but also can be rotten and pollute the urban environment, the environmental sanitation condition is influenced, a water source is polluted, the human health is influenced for a long time, the industrial sludge also contains rich organic matters, nitrogen, phosphorus and other nutrient elements, and the direct discharge of the industrial sludge is also great waste.
At present, the mode of treating industrial sludge in China mainly comprises treatment technologies such as concentration, sludge conditioning, anaerobic digestion, dehydration, composting and incineration, the landfill treatment cost is low and the implementation is easy, however, in the process of industrial sludge landfill, landfill leachate and harmful gas are easily generated, the pollution of the leachate to soil is great, and the generated harmful gas is mainly methane and is easy to explode and burn; incineration of sludge is also one of the main ways of disposal, however incineration of sludge without drying is difficult and the cost required for incineration is high and uneconomical.
Disclosure of Invention
The invention aims to provide an industrial sludge ceramsite and a preparation method thereof, which can effectively recycle industrial sludge and provide a method for recycling industrial sludge.
In order to solve the problems, the invention adopts the following technical scheme:
the industrial sludge sintered ceramsite comprises the following components in parts by weight:
industrial sludge powder: 60-80 parts;
loess powder: 20-40 parts;
fly ash: 10-20 parts;
clay: 15-20 parts of a solvent;
sludge: 5-10 parts;
in addition to the above components, 24 parts of water were included.
The preferable scheme comprises the following components in parts by mass:
industrial sludge powder: 70 parts of (B);
loess powder: 25 parts of (1);
fly ash: 15 parts of (1);
clay: 15 parts of (1);
sludge: 10 parts of (A);
in addition to the above components, 24 parts of water were included.
Preferably, the industrial sludge powder is obtained by dehydrating industrial sludge, drying and crushing the dehydrated industrial sludge to be below 150 meshes.
Preferably, the loess powder is obtained by pulverizing loess and crushing to 150 meshes or less.
The method for preparing the industrial sludge sintered ceramsite comprises the following steps:
(1) sequentially adding industrial sludge powder, loess powder, fly ash, clay and sludge into a stirrer according to a ratio, adding water, stirring for the first time, adding the rest water after stirring, and stirring again to obtain a mixed material;
(2) adding the mixed material into a granulator, adding water into the mixed material in a spraying mode into the granulator to adjust the pH value of the mixed material, and continuing to operate the granulator after spraying is finished to obtain raw material balls;
(3) and drying the raw material balls, adding the dried raw material balls into a high-temperature furnace for preheating, heating the high-temperature furnace after preheating is finished, sintering the raw material balls, taking out the raw material balls after sintering is finished, and cooling to obtain the industrial sludge sintered ceramsite.
Preferably, in the step (1), the water added twice is 3 parts and 9 parts by weight respectively, and the stirring speed is 1000 rpm.
Preferably, in the step (2), 12 parts of water are added, the spraying time is 10 minutes, and the continuous operation time is 50 minutes in parts by mass.
Preferably, in the step (3), the drying temperature of the raw material balls is 120 ℃.
Preferably, in the step (3), the preheating temperature is 350 ℃, the sintering temperature is 1150 ℃, and the temperature rising speed is 2 ℃/min.
The main components of the industrial sludge, the clay and the fly ash are similar and are silicon dioxide, aluminum oxide, magnesium oxide, calcium oxide and iron oxide, all the raw materials can be well fused through high-temperature sintering, the dispersion degree of the clay can be reduced through the silicon dioxide, the expansion performance of the clay is reduced, the silicon content in the loess is higher relative to other components, more silicon dioxide can be provided, and the sintering shrinkage can be reduced through larger silicon dioxide particles, so that the influence is reduced.
The alumina can react with the ferric oxide to generate carbon dioxide and hercynite in the sintering process, but if the amount of the alumina is too large, the sintering temperature of the ceramsite can be increased, and the invention controls the sintering temperature by reasonably controlling the dosage of each raw material.
The addition of the sludge can well mix the components and provide partial caking effect to fully combine the raw materials.
The industrial sludge powder is used as the main component of the invention and also plays the main role, and the industrial sludge powder is combined with other components to be used as the main component, so that the industrial sludge has higher strength and pressure resistance after solidification and molding.
The technical scheme has the following beneficial technical effects:
the raw materials adopted by the invention are industrial wastes, and all components are combined by waste utilization, so that the environment is protected, the cost is low, and the effective recycling of resources is realized.
The industrial sludge sintered ceramsite prepared by matching the raw materials has better performance in all aspects, and the product performance is excellent by reasonably controlling the formula proportion.
The processing method provided by the invention is simple, the complex steps in sintering are reasonably reduced, and the preparation of the invention can be easily carried out by operators.
Detailed description of the preferred embodiments
The invention is further described with reference to specific examples.
The following examples are not provided to limit the scope of the present invention, nor are the steps described to limit the order of execution. Modifications of the invention which are obvious to those skilled in the art in view of the prior art are also within the scope of the invention as claimed.
Example one
The industrial sludge sintered ceramsite comprises the following components:
industrial sludge powder: 60 parts; loess powder: 20 parts of (1); fly ash: 10 parts of (A); clay: 15 parts of (1); sludge: 5 parts of a mixture; and 24 parts water.
A method for sintering ceramsite by using industrial sludge comprises the following steps:
(1) sequentially adding industrial sludge powder, loess powder, fly ash, clay and sludge into a stirrer according to a ratio, adding 3 parts of water, carrying out primary stirring, adding 9 parts of water after stirring, and carrying out secondary stirring to obtain a mixed material, wherein the stirring speed is 1000 revolutions per minute;
(2) adding the mixed material into a granulator, adding water into the mixed material in a spraying mode into the granulator, wherein the added water is 12 parts, continuously operating the granulator after spraying is finished, and obtaining raw material balls after 50 minutes;
(3) drying the raw material balls at 120 ℃, then adding the raw material balls into a high-temperature furnace for preheating at 350 ℃, uniformly heating the high-temperature furnace to 1150 ℃ after preheating, sintering the raw material balls, taking out the raw material balls after sintering, and cooling to obtain the industrial sludge sintered ceramsite.
Example two
The industrial sludge sintered ceramsite comprises the following components:
industrial sludge powder: 70 parts of (B); loess powder: 25 parts of (1); fly ash: 15 parts of (1); clay: 15 parts of (1); sludge: 10 parts of (A); and 24 parts water.
A method for sintering ceramsite by using industrial sludge comprises the following steps:
(1) sequentially adding industrial sludge powder, loess powder, fly ash, clay and sludge into a stirrer according to a ratio, adding 3 parts of water, carrying out primary stirring, adding 9 parts of water after stirring, and carrying out secondary stirring to obtain a mixed material, wherein the stirring speed is 1000 revolutions per minute;
(2) adding the mixed material into a granulator, adding water into the mixed material in a spraying mode into the granulator, wherein the added water is 12 parts, continuously operating the granulator after spraying is finished, and obtaining raw material balls after 50 minutes;
(3) drying the raw material balls at 120 ℃, then adding the raw material balls into a high-temperature furnace for preheating at 350 ℃, uniformly heating the high-temperature furnace to 1150 ℃ after preheating, sintering the raw material balls, taking out the raw material balls after sintering, and cooling to obtain the industrial sludge sintered ceramsite.
EXAMPLE III
The industrial sludge sintered ceramsite comprises the following components:
industrial sludge powder: 80 parts of a mixture; loess powder: 40 parts of a mixture; fly ash: 20 parts of (1); clay: 20 parts of (1); sludge: 10 parts of (A); and 24 parts water.
A method for sintering ceramsite by using industrial sludge comprises the following steps:
(1) sequentially adding industrial sludge powder, loess powder, fly ash, clay and sludge into a stirrer according to a ratio, adding 3 parts of water, carrying out primary stirring, adding 9 parts of water after stirring, and carrying out secondary stirring to obtain a mixed material, wherein the stirring speed is 1000 revolutions per minute;
(2) adding the mixed material into a granulator, adding water into the mixed material in a spraying mode into the granulator, wherein the added water is 12 parts, continuously operating the granulator after spraying is finished, and obtaining raw material balls after 50 minutes;
(3) drying the raw material balls at 120 ℃, then adding the raw material balls into a high-temperature furnace for preheating at 350 ℃, uniformly heating the high-temperature furnace to 1150 ℃ after preheating, sintering the raw material balls, taking out the raw material balls after sintering, and cooling to obtain the industrial sludge sintered ceramsite.
And (3) collecting the ceramsite prepared in the first, second and third embodiments, and detecting partial performance of the ceramsite, wherein the detection data is as follows:
table one: examples Performance data of the ceramsite obtained in the first, second and third examples
| Example one | Example two | EXAMPLE III | |
| Range of particle size | 8～15mm | 9～17mm | 10～20mm |
| Bulk density | 1000Kg/m3 | 1200Kg/m3 | 1100Kg/m3 |
| Barrel pressure strength | 5.0Mpa | 5.3Mpa | 5Mpa |
| Water absorption rate of 1h | 12％ | 20％ | 17％ |
As shown in the table I, the industrial sludge sintered ceramsite prepared by the method has the advantages of average particle size, excellent strength and water absorption performance indexes, and great advantages compared with the ordinary ceramsite on the market, and the ceramsite prepared by the method is more environment-friendly, recycles resources and has relatively low cost.
While the foregoing description shows and describes several preferred embodiments of the invention, it is to be understood, as noted above, that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive of other embodiments, and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as described herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. The industrial sludge sintered ceramsite is characterized by comprising the following components in parts by weight:
industrial sludge powder: 60-80 parts;
loess powder: 20-40 parts;
fly ash: 10-20 parts;
clay: 15-20 parts of a solvent;
sludge: 5-10 parts;
in addition to the above components, 24 parts of water were included.
2. The industrial sludge sintered ceramsite of claim 1, which comprises the following components in parts by weight:
industrial sludge powder: 70 parts of (B);
loess powder: 25 parts of (1);
fly ash: 15 parts of (1);
clay: 15 parts of (1);
sludge: 10 parts of (A);
in addition to the above components, 24 parts of water were included.
3. The industrial sludge sintered ceramsite of claim 1, wherein the industrial sludge powder is obtained by dehydrating industrial sludge, drying and crushing the industrial sludge to 150 meshes or less.
4. The industrial sludge sintered ceramsite of claim 1, wherein the loess powder is obtained by pulverizing loess and crushing the pulverized loess to 150 mesh or less.
5. The method for preparing the industrial sludge sintered ceramsite of claims 1-4, which is characterized by comprising the following steps:
(1) sequentially adding industrial sludge powder, loess powder, fly ash, clay and sludge into a stirrer according to a ratio, adding water, stirring for the first time, continuously adding water after stirring, and stirring again to obtain a mixed material;
(2) adding the mixed material into a granulator, adding water into the mixed material in a spraying manner into the granulator, and continuing to operate the granulator after spraying is finished to obtain raw material balls;
(3) and drying the raw material balls, adding the dried raw material balls into a high-temperature furnace for preheating, heating the high-temperature furnace after preheating is finished, sintering the raw material balls, taking out the raw material balls after sintering is finished, and cooling to obtain the industrial sludge sintered ceramsite.
6. The method for preparing sintered ceramsite according to claim 5, wherein in the step (1), the amount of water added in two times is 3 parts and 9 parts, respectively, and the stirring speed is 1000 rpm.
7. The method for preparing industrial sludge sintered ceramsite according to claim 5, wherein in the step (2), by mass, 12 parts of water are added, the spraying time is 10 minutes, and the continuous operation time is 50 minutes.
8. The method for preparing sintered ceramsite with industrial sludge according to claim 5, wherein the drying temperature of the raw material pellets in step (3) is 120 ℃.
9. The method for preparing sintered ceramsite containing industrial sludge as claimed in claim 5, wherein in the step (3), the preheating temperature is 350 ℃, the sintering temperature is 1150 ℃, and the heating rate is 2 ℃/min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811227471.0A CN111072391A (en) | 2018-10-22 | 2018-10-22 | Industrial sludge sintered ceramsite and preparation method thereof |
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| CN201811227471.0A CN111072391A (en) | 2018-10-22 | 2018-10-22 | Industrial sludge sintered ceramsite and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111848210A (en) * | 2020-07-07 | 2020-10-30 | 何汉武 | Novel sponge water storage argil and preparation method thereof |
| CN112142444A (en) * | 2020-08-24 | 2020-12-29 | 辽宁大学 | Plate-type ceramsite prepared from dewatered sludge, and preparation method and application thereof |
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Application publication date: 20200428 |