CN112142444A - Plate-type ceramsite prepared from dewatered sludge, and preparation method and application thereof - Google Patents

Plate-type ceramsite prepared from dewatered sludge, and preparation method and application thereof Download PDF

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Publication number
CN112142444A
CN112142444A CN202010853728.4A CN202010853728A CN112142444A CN 112142444 A CN112142444 A CN 112142444A CN 202010853728 A CN202010853728 A CN 202010853728A CN 112142444 A CN112142444 A CN 112142444A
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plate
ceramsite
sludge
type
solid
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包红旭
李泽
张烨
徐晓红
宋泽斌
巨承文
胡家伟
刘洪源
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Liaoning University
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Liaoning University
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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
    • C04B33/1321—Waste slurries, e.g. harbour sludge, industrial muds
    • 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
    • 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
    • C04B33/1315—Non-ceramic binders
    • 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
    • C04B33/32—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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5022—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with vitreous 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C04B41/85—Coating or impregnation with inorganic materials
    • C04B41/86—Glazes; Cold glazes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/105—Phosphorus compounds
    • 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Supply & Treatment (AREA)
  • Treatment Of Sludge (AREA)

Abstract

The invention relates to a method for preparing plate-type ceramsite by using dewatered sludge and application thereof, belonging to the fields of sewage treatment technology and building materials. The preparation method comprises the following steps: 1) drying the loess solid and the sludge solid according to a mass ratio of 8: 5-2: 5, and taking the loess solid and the sludge solid; 2) manually manufacturing a ceramsite plate; 3) roasting the ceramsite plate at high temperature; 4) and coating the cooled ceramsite plate with the prepared glaze for secondary firing. When the plate-type ceramsite prepared from the dewatered sludge is used for treating phosphorus-containing wastewater, the optimal ceramsite adding amount is 20g/L, the optimal hydraulic retention time is 7d, and under the optimal condition, the removal rate of phosphorus in the wastewater reaches 90%. Realizes the resource utilization of the sludge, saves energy, protects environment, and has wide market and more outstanding performance.

Description

Plate-type ceramsite prepared from dewatered sludge, and preparation method and application thereof
Technical Field
The invention belongs to the field of sewage treatment technology and building materials, and particularly relates to a method for preparing plate-type ceramsite by using dewatered sludge and application of the plate-type ceramsite in treatment of phosphorus-containing wastewater.
Background
Along with the rapid development of the country, the living standard of people is remarkably improved. But also causes great damage to the environment. Regarding the sludge pollution problem, the sludge contains a large amount of germs and parasites (eggs), and meanwhile, the sludge also contains heavy metals which have great harm to the environment, such as lead, zinc, cadmium, mercury and the like. 200 million tons of sludge are produced in China at a great date every year, and the number of sludge seriously affects the life of the people. In terms of disposal, only landfill, incineration, and the like are currently effective, but none of them is an optimal disposal method. The sludge also contains abundant scarce metal elements such as copper, chromium, potassium and the like in China. We should seek a disposal method that is both environmentally friendly and realizes the resource utilization of sludge.
The ceramic plate is a material with a honeycomb-shaped porous structure inside, and has the excellent performances of low heat conductivity coefficient, low water absorption, high strength, good heat insulation, heat preservation, moisture protection, frost resistance, sound insulation, shock resistance and the like. Has wide application in various fields in recent years. Considering that the main chemical components of the sludge are silicon dioxide, magnesium hydroxide, calcium carbonate and the like, the chemical components are basically consistent with those of the ceramic plate. The ceramic plate is prepared from the sludge, so that the problem of sludge pollution is solved, a large amount of raw materials are provided for the manufacture of the ceramic plate, and a win-win effect is achieved.
Disclosure of Invention
The invention analyzes and discusses the source, components and resource utilization of the current sludge, adopts dewatered sludge to prepare a brand-new ceramic material of plate-type ceramsite, realizes resource utilization of the sludge, is energy-saving and environment-friendly, and has wide market and more outstanding performance.
In order to achieve the purpose, the invention adopts the following technical scheme: a method for preparing plate-type ceramsite by using dewatered sludge,
the preparation method comprises the following steps:
1) drying loess and sludge, grinding sludge solid and loess solid, pulverizing, and sieving;
2) manually manufacturing a ceramsite plate;
3) roasting the ceramsite plate at high temperature;
4) and coating the cooled ceramsite plate with the prepared glaze for secondary firing.
The plate-type ceramsite prepared from the dewatered sludge comprises the following sludge solids in percentage by mass: the loess solid is 8: 5-2: 5.
In the step 1), the screen mesh selected for sieving is a standard sieve with the size of 150 microns, and undersize products are taken.
The step 2) of preparing the plate-type ceramsite by using the dewatered sludge specifically comprises the following steps: adding cosolvent and deionized water into the mixture of the sludge solid powder and loess solid powder, stirring, kneading to obtain viscous mud mass, making into plate with tool, and drying.
The plate-type ceramsite is prepared from the dewatered sludge, and the addition amount of the cosolvent is 5% of the total mass of the sludge solid powder and the loess solid powder.
In the method for preparing the plate-type ceramsite by using the dewatered sludge, the cosolvent is ethanol.
The step 3) of preparing the plate-type ceramsite by using the dewatered sludge specifically comprises the following steps: preheating the ceramsite plate for a period of time, adjusting the temperature to 1100-1200 ℃, firing, keeping the temperature for 10-20 min, and cooling to room temperature.
The plate-type ceramsite is prepared from the dewatered sludge, the preheating temperature is 300-350 ℃, and the preheating time is 20 min.
The step 4) of preparing the plate-type ceramsite by using the dewatered sludge specifically comprises the following steps: coating the prepared glaze on the ceramsite plate obtained in the step 3), and keeping the temperature of the ceramsite plate at 1000 ℃ for 10 min.
The application of any plate-type ceramsite prepared from the dewatered sludge in the treatment of the phosphorus-containing wastewater comprises the following steps: and (3) adding 250mL of phosphorus-containing wastewater solution with the total phosphorus concentration of 20mg/L to adjust the pH value of the wastewater to be 7, adding 20 g/L-60 g/L of any plate-type ceramsite prepared from the dewatered sludge, and oscillating at 25 ℃ and 120 rpm.
The invention has the beneficial effects that:
(1) the dewatered sludge is used as a raw material, so that the resource comprehensive utilization of solid waste is realized, the harmlessness and the resource utilization of the sludge are realized, and the energy conservation, emission reduction and environmental protection are facilitated;
(2) the problems that a large amount of land resources are required to be occupied and secondary pollution is easily caused in the sludge landfill process are solved, the environment is protected, the land is saved, and the comprehensive utilization rate of the sludge resources is obviously improved;
(3) the sludge ceramsite plate has the advantages of simple production process, no three-waste discharge, low investment, quick response, low cost and good benefit, and meets the requirements of energy conservation and emission reduction, low-carbon economy development and cyclic economy policy;
(4) the sludge ceramsite plate disclosed by the invention is small in volume density, has more excellent heat-insulating property, and is suitable for producing heat-insulating wall materials.
Drawings
FIG. 1 is a graph of burn temperature versus average burn rate.
FIG. 2 is a graph showing the relationship between the ratio of loess to sludge and the average ignition loss.
FIG. 3 is a graph showing the increase of phosphorus adsorption of ceramsite with time at different addition amounts.
FIG. 4 is a graph showing the relationship between hydraulic retention time and phosphorus adsorption effect.
Detailed Description
Example 1 preparation of sludge ceramsite plate
1. Pretreatment of raw materials:
and setting the temperature of the drying oven at 110 ℃, and drying the sludge solid and the loess solid in the drying oven for 24 hours.
2. Preparing a sludge ceramsite plate:
1) loess by mass ratio: grinding 12g of sludge solid and 6g of loess solid respectively, crushing, sieving with a 150 μm standard sieve until the sludge is powdery, and taking undersize;
2) taking the powder obtained in the step 1), adding 20ml of 0.5% ethanol cosolvent and a proper amount of deionized water, stirring, kneading until the powder is a viscous mud mass, manually manufacturing a ceramsite plate, manufacturing the ceramsite plate into a plate shape by using tools such as a ruler and the like, and drying at the constant temperature of 110 ℃ for 2 hours;
3) preheating the ceramsite plate at 350 ℃ for 20min, heating to 1150 ℃ at the speed of 2-3 ℃/min, firing, and keeping the temperature constant for 20 min.
4) And cooling the ceramsite plate to room temperature, coating the prepared glaze, putting the ceramsite plate into a muffle furnace, heating to 1000 ℃ at the speed of 2-3 ℃/min, and carrying out secondary firing at constant temperature for 10 min.
Example 2 determination of optimal conditions of sludge ceramsite plate in preparation process
1. Determination of the burning temperature
Drying the loess solid and the sludge solid respectively, weighing 12g of loess solid and 8g of sludge solid according to the mass ratio of 6:4, grinding, pulverizing, sieving with 150 μm standard sieve until powder, and adding 20ml of 0.5% cosolvent. Fully mixing, adding a proper amount of deionized water, stirring and kneading to form a paste. And (3) making the sample into a plate by using a mould, drying the plate at a constant temperature of 110 ℃ for 2h, then placing the plate into a muffle furnace, heating the plate to 300 ℃, keeping the temperature for 20min, then adjusting a temperature control keyboard to 1100 ℃, and keeping the temperature for 20min after the sample is heated from 300 ℃ to 1150 ℃. The above procedures were repeated to adjust the temperature to 1125 ℃, 1175 ℃ and 1120 ℃ respectively. And cooling the ceramsite plate to room temperature, coating the prepared glaze, putting the ceramsite plate into a muffle furnace for secondary firing, and keeping the temperature for 10 min. And (4) closing the power supply of the muffle furnace, taking out the ceramsite plate after a period of time, and cooling to room temperature.
Calculating the ignition loss rate according to the following formula:
P＝(A-B)/A*100％
in the formula: p- -reduction of ignition, percent
A- -mass at Pre-firing Chamber temperature, g
B- -quality at room temperature after firing, g
As a result, as shown in FIG. 1, the average burn rate gradually increased with increasing temperature. When the temperature is 1100-1150 ℃, the increment of the ignition loss rate is faster; the increase in the burn rate after 1150 ℃ becomes slower. When the burning temperature reaches 1175 ℃, the ceramsite plate begins to crack; the degree of cracking increases at 1200 ℃. Therefore, the optimal ignition temperature is 1150 ℃ in the preferred method of the invention.
2. Determining the ratio of the loess to the sludge:
respectively drying the loess solid and the sludge solid, respectively weighing 14g of the loess solid and 6g of the sludge solid, 12g of the loess solid and 8g of the sludge solid, 10g of the loess solid and 10g of the sludge solid according to the mass ratio of 7:3, 6:4 and 5:5, grinding, crushing, sieving by a 150 mu m standard sieve until the loess solid and the sludge solid are powdery, and respectively adding 20ml of 0.5 percent of cosolvent. Fully mixing, adding a proper amount of deionized water, stirring and kneading to form a paste. And (3) making the sample into a plate by using a mould, drying the plate at a constant temperature of 110 ℃ for 2h, then placing the plate into a muffle furnace, heating the plate to 300 ℃, keeping the temperature for 20min, then adjusting a temperature control keyboard to 1150 ℃, and keeping the temperature for 20min after the sample is heated from 300 ℃ to 1150 ℃. And cooling the ceramsite plate to room temperature, coating the prepared glaze, putting the ceramsite plate into a muffle furnace for secondary firing, and keeping the temperature for 10 min. And (4) closing the power supply of the muffle furnace, taking out the ceramsite plate after a period of time, and cooling to room temperature. Calculating the burn reduction rate.
As a result, as shown in FIG. 2, the average burn-off rate gradually increased as the sludge ratio increased. When the amount of sludge added is 40%, the rate of increase of the ignition loss is the fastest, and when the amount of sludge added exceeds 40%, the rate of increase of the average ignition loss begins to slow down. The addition of the sludge exceeding 40 percent can cause the overall strength of the ceramsite plate to be reduced, and the ceramsite plate deforms and does not meet the process requirements. Therefore, preferred in the present invention, loess: the proportion of the sludge is 6: 4.
Example 3 application of sludge ceramsite plate in treatment of phosphorus-containing wastewater
1. Influence of ceramsite addition on phosphorus adsorption
The method comprises the following steps: KH with total phosphorus concentration of 20mg/L is taken2PO4Pouring the solution into a conical flask, crushing the ceramsite plate, respectively taking 20g/L, 40g/L and 60g/L of the crushed ceramsite, adjusting the pH value of the sewage to be 7, then placing the conical flask into a full-temperature oscillator to shake, setting the temperature to be 25 ℃ and the oscillation speed to be 120rpm, periodically taking a small amount of supernatant solution to filter, and measuring and calculating the content of total phosphorus in the solution every day within 15 days.
As shown in FIG. 3, the adsorption capacity of the ceramsite was maximized to about 17mg/g at an amount of 60g/L, and the phosphorus removal rate was 56%.
2. Effect of Hydraulic residence time on phosphorus adsorption
The method comprises the following steps: KH with total phosphorus concentration of 20mg/L is taken2PO4Pouring the solution into an erlenmeyer flask, wherein the adding amount of the plate-type ceramsite is 20g/L, adjusting the pH of the sewage to be 7, then placing the erlenmeyer flask into a full-temperature oscillator to shake, setting the temperature to be 25 ℃ and the oscillating speed to be 120rpm, taking a small amount of supernatant solution at 1d, 2d, 3d, 9d and 10d respectively, filtering, and measuring and calculating the content of total phosphorus in the solution.
As shown in FIG. 4, the phosphorus adsorption amount of the dewatered sludge ceramsite increased with the increase of the adsorption time, and the phosphorus removal rate reached 90% when the adsorption amount reached a saturated state on day 7.

Claims (10)

1. The method for preparing the plate-type ceramsite by using the dewatered sludge is characterized by comprising the following steps of:
1) drying loess and sludge, grinding sludge solid and loess solid, pulverizing, and sieving;
2) manually manufacturing a ceramsite plate;
3) roasting the ceramsite plate at high temperature;
4) and coating the cooled ceramsite plate with the prepared glaze for secondary firing.
2. The method for preparing plate-type ceramsite by using dewatered sludge according to claim 1, wherein the mass ratio of sludge solids: the loess solid is 8: 5-2: 5.
3. The method for preparing plate-type ceramsite according to claim 2, wherein the screen used for sieving in step 1) is a standard 150 μm screen, and the undersize is removed.
4. The method for preparing plate-type ceramsite by using dewatered sludge according to claim 3, wherein the step 2) is specifically as follows: adding cosolvent and deionized water into the mixture of the sludge solid powder and loess solid powder, stirring, kneading to obtain viscous mud mass, making into plate with tool, and drying.
5. The plate-shaped ceramsite as claimed in claim 4, wherein the cosolvent is added in an amount of 5% by weight of the total weight of the sludge solid powder and the loess solid powder.
6. The method for preparing plate-type ceramsite according to claim 5, wherein the cosolvent is ethanol.
7. The method for preparing plate-type ceramsite by using dewatered sludge according to claim 6, wherein the step 3) is specifically as follows: preheating the ceramsite plate for a period of time, adjusting the temperature to 1100-1200 ℃, firing, keeping the temperature for 10-20 min, and cooling to room temperature.
8. The method for preparing plate-type ceramsite according to claim 7, wherein the preheating temperature is 300-350 ℃ and the preheating time is 20 min.
9. The method for preparing plate-type ceramsite by using dewatered sludge according to claim 8, wherein the step 4) is specifically as follows: coating the prepared glaze on the ceramsite plate obtained in the step 3), and keeping the temperature of the ceramsite plate at 1000 ℃ for 10 min.
10. The use of plate-type ceramisites prepared from dewatered sludge as defined in any of claims 1 to 9 for treating phosphorus-containing wastewater, wherein the method comprises the following steps: adding 20 g/L-60 g/L plate-type ceramsite prepared from any one of the dewatered sludge described in claims 1-9 into 250mL of phosphorus-containing wastewater solution with the total phosphorus concentration of 20mg/L, adjusting the pH of the wastewater to be 7, and oscillating at 25 ℃ and 120 rpm.
CN202010853728.4A 2020-08-24 2020-08-24 Plate-type ceramsite prepared from dewatered sludge, and preparation method and application thereof Pending CN112142444A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105418145A (en) * 2015-12-29 2016-03-23 山东大学 Method of preparing porous phosphor absorbing ceramic particle from sludge in water supply plant
CN106540650A (en) * 2016-10-20 2017-03-29 北京师范大学 A kind of preparation method of waterworks sludge base dephosphorization granule adsorbent
CN106747299A (en) * 2016-11-28 2017-05-31 北京师范大学 A kind of waterworks sludge base haydite that activates strengthens its method for inhaling phosphorus effect
CN107129317A (en) * 2017-05-14 2017-09-05 江苏常大绿恒环境工程有限公司 A kind of preparation method of hydrophobicity light ceramic
US20190247824A1 (en) * 2016-11-30 2019-08-15 Qingdao Yi Eco-Environmental Protection Technology Co., Ltd Ceramsite Produced by Using River/Lake/Sea Sludge and Seashell Powder as Raw Materials and Preparation Method Thereof
CN111072391A (en) * 2018-10-22 2020-04-28 萍乡市华星环保工程技术有限公司 Industrial sludge sintered ceramsite and preparation method thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105418145A (en) * 2015-12-29 2016-03-23 山东大学 Method of preparing porous phosphor absorbing ceramic particle from sludge in water supply plant
CN106540650A (en) * 2016-10-20 2017-03-29 北京师范大学 A kind of preparation method of waterworks sludge base dephosphorization granule adsorbent
CN106747299A (en) * 2016-11-28 2017-05-31 北京师范大学 A kind of waterworks sludge base haydite that activates strengthens its method for inhaling phosphorus effect
US20190247824A1 (en) * 2016-11-30 2019-08-15 Qingdao Yi Eco-Environmental Protection Technology Co., Ltd Ceramsite Produced by Using River/Lake/Sea Sludge and Seashell Powder as Raw Materials and Preparation Method Thereof
CN107129317A (en) * 2017-05-14 2017-09-05 江苏常大绿恒环境工程有限公司 A kind of preparation method of hydrophobicity light ceramic
CN111072391A (en) * 2018-10-22 2020-04-28 萍乡市华星环保工程技术有限公司 Industrial sludge sintered ceramsite and preparation method thereof

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Application publication date: 20201229