CN111116170B - Ceramsite material prepared from serpentine tailings and sludge and preparation method thereof - Google Patents
Ceramsite material prepared from serpentine tailings and sludge and preparation method thereof Download PDFInfo
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- CN111116170B CN111116170B CN201911350750.0A CN201911350750A CN111116170B CN 111116170 B CN111116170 B CN 111116170B CN 201911350750 A CN201911350750 A CN 201911350750A CN 111116170 B CN111116170 B CN 111116170B
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- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 title claims abstract description 41
- 239000010802 sludge Substances 0.000 title claims abstract description 33
- 239000000463 material Substances 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000002994 raw material Substances 0.000 claims abstract description 32
- 239000002910 solid waste Substances 0.000 claims abstract description 25
- 238000001035 drying Methods 0.000 claims abstract description 18
- 239000004927 clay Substances 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000005245 sintering Methods 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- 239000000843 powder Substances 0.000 claims abstract description 10
- 238000000227 grinding Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 6
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical group [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 4
- 238000004064 recycling Methods 0.000 abstract description 2
- 238000009740 moulding (composite fabrication) Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- XJKVPKYVPCWHFO-UHFFFAOYSA-N silicon;hydrate Chemical compound O.[Si] XJKVPKYVPCWHFO-UHFFFAOYSA-N 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
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- 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
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- C04B33/00—Clay-wares
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- C04B33/13—Compounding ingredients
- C04B33/131—Inorganic additives
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- 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
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
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- 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
- C04B2235/38—Non-oxide ceramic constituents or additives
- C04B2235/3817—Carbides
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- 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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- Environmental & Geological Engineering (AREA)
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- Treatment Of Sludge (AREA)
Abstract
The invention relates to the field of comprehensive utilization of solid wastes, in particular to a ceramsite material prepared from serpentine tailings and sludge and a preparation method thereof; the ceramsite material is prepared from the following raw materials in percentage by mass: 65-75% of serpentine tailings and 20-30% of sludge; the preparation method of the ceramsite material comprises the following steps: (1) drying the serpentine tailing fine powder and sludge respectively, and mixing to obtain a dry solid waste raw material; mixing the solid waste raw materials with clay, pore-forming agent and water, and grinding to obtain a mixture; (2) putting the mixture into a granulator to prepare a ceramsite blank; (3) and drying the ceramsite blank, and sintering at high temperature. The method of the invention not only can fully utilize the serpentine tailings and the sludge of the solid wastes, but also can greatly improve the added value of the solid wastes, realize the recycling of the solid wastes and reduce the field resources occupied by landfill.
Description
Technical Field
The invention relates to the field of comprehensive utilization of solid wastes, in particular to a ceramsite material prepared from serpentine tailings and sludge and a preparation method thereof.
Background
The serpentine tailings are solid wastes generated in the process of exploiting and utilizing serpentine, and mainly comprise MgO, FeO and Fe2O3、Al2O3、SiO2(ii) a The serpentine tailings, as mining wastes, not only waste mineral resources, but also occupy a large amount of land, not only cause environmental pollution, but also destroy natural ecology more seriously, and influence normal production order. Sludge is produced in the sewage treatment processThe paste is easy to decay and smell, enriches pollutants in sewage, contains a large amount of nutrient substances such as nitrogen and phosphorus, and toxic and harmful substances such as organic matters, virus microorganisms, parasitic ova, heavy metals and the like, and can cause serious harm to the environment without effective treatment and treatment.
Investigation shows that the exploitation amount of the serpentine mineral is about 200-300 ten thousand tons at present, the serpentine tailings account for about one third to two thirds of the exploitation amount, the utilization rate of the serpentine tailings only accounts for about 2% of the emission amount, and the utilization efficiency is very low. At present, 80% of sludge is not effectively treated, and even a large part of sludge is directly discarded in public environments such as farmlands, rivers and the like and becomes a new pollution source, so that the environmental pollution is aggravated.
Therefore, how to increase the additional value of the serpentine tailings and the sludge and develop new application of solid wastes is a difficult task at present aiming at the current situations of insufficient utilization of the serpentine tailings and the sludge, environmental pollution and the like.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
In order to solve the technical problems, the invention provides a ceramsite material which is prepared from the following raw materials in percentage by mass: 65-75% of serpentine tailings and 20-30% of sludge; preferably the serpentine tailings are added as a fine serpentine tailings powder.
The ceramsite material provided by the invention takes serpentine tailings and sludge as main raw materials, greatly increases the additional values of the serpentine tailings and the sludge, and further exploits the new application of the two solid wastes, thereby realizing the efficient utilization of the serpentine tailings and the sludge.
Preferably, the raw material further comprises clay, and the mass percentage of the clay is 4-6%.
Preferably, the ceramsite material is prepared from the following raw materials in percentage by mass: 65-75% of serpentine tailings, 20-30% of sludge and 4-6% of clay.
The ceramsite material disclosed by the invention fully utilizes two solid wastes (namely serpentine tailings and sludge) and is further compounded with clay to obtain a raw material; as a better technical scheme, the ceramsite material is prepared from the following raw materials in percentage by mass: 70% of serpentine tailings, 25% of sludge and 5% of clay.
In order to further improve the utilization rate of serpentine tailings and sludge, a pore-forming agent and water are preferably added to the raw materials.
Preferably, the pore-forming agent is added in an amount of 0.3 to 0.5% and water is added in an amount of 16 to 18% per kg of the raw material.
Preferably, the pore-forming agent is silicon carbide powder.
Preferably, the pore-forming agent is added in an amount of 0.4% and water is added in an amount of 17% per kg of the raw material.
The invention also provides a preparation method of the ceramsite material, which comprises the following steps:
(1) drying the serpentine tailing fine powder and sludge respectively, and mixing to obtain a dry solid waste raw material; mixing the solid waste raw material with clay, a pore-forming agent and water, and grinding to obtain a mixture;
(2) putting the mixture into a granulator to prepare a ceramsite blank;
(3) and drying the ceramsite blank, and then sintering at high temperature.
Preferably, the high-temperature sintering adopts sectional temperature rise: the temperature rise rate is 10 plus or minus 0.5 ℃/min from 0 ℃ to 400 ℃; the temperature rise rate is 3 plus or minus 0.5 ℃/min from 400 ℃ to 600 ℃; the temperature rise rate is 12 plus or minus 0.5 ℃/min from 600 ℃ to 950 ℃; the temperature rise rate is 4 plus or minus 0.5 ℃/min from 950 to 1200 ℃; keeping the temperature at 1200 ℃ for 55-65 min.
The invention discovers that the key factor of the method for preparing the ceramsite material by using the serpentine tailings and the sludge is high-temperature sintering; furthermore, the invention determines the condition of high-temperature sintering, namely sectional temperature rise, through experimental research; specifically, the sectional heating is divided into five stages, and each stage is heated in sequence for sintering, so that the finally obtained product has better performance.
Preferably, the particle size of the ground mixture is 150-200 meshes.
Preferably, the drying temperature in the step (1) is 140-160 ℃; preferably 150 deg.c.
Preferably, the drying temperature in the step (3) is 140-160 ℃; preferably 150 deg.c.
As a preferred embodiment of the invention, the preparation method comprises the following steps:
(1) drying the serpentine tailing fine powder and sludge respectively, and mixing to obtain a dry solid waste raw material; mixing the solid waste raw material with clay, a pore-forming agent and water, and grinding to obtain a mixture;
(2) putting the mixture into a granulator to prepare a ceramsite blank;
(3) drying the ceramsite blank, sintering at high temperature, cooling to room temperature, and grading according to different particle sizes to obtain a ceramsite material product;
wherein, the high-temperature sintering adopts sectional heating: the temperature rise rate is 10 plus or minus 0.5 ℃/min from 0 ℃ to 400 ℃; the temperature rise rate is 3 plus or minus 0.5 ℃/min from 400 ℃ to 600 ℃; the temperature rise rate is 12 plus or minus 0.5 ℃/min from 600 ℃ to 950 ℃; the temperature rise rate is 4 plus or minus 0.5 ℃/min from 950 to 1200 ℃; keeping the temperature at 1200 ℃ for 55-65 min.
The invention has the beneficial effects that:
(1) the preparation method comprises the steps of drying and mixing the serpentine tailing fine powder and sludge respectively, mixing the serpentine tailing fine powder with the clay, a pore-forming agent and water, and then carrying out the steps of forming, shaping and screening, drying, sintering, cooling, screening and grading and the like to obtain the solid waste ceramsite material.
(2) The method of the invention not only can fully utilize the serpentine tailings and the sludge of the solid wastes, but also can greatly improve the added value of the solid wastes, realize the recycling of the solid wastes and reduce the field resources occupied by landfill.
Drawings
FIG. 1 is a process flow diagram of the preparation method of the present invention.
FIG. 2 is a schematic view of a ceramsite material prepared in example 1.
Detailed Description
The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Example 1
The embodiment provides a ceramsite material (as shown in fig. 2), which is prepared from the following raw materials in percentage by mass: 70% of serpentine tailings, 25% of sludge and 5% of clay; to each kilogram of the raw material was added 0.4% silicon carbide powder and 17% water.
The embodiment also provides a preparation method of the ceramsite material (as shown in fig. 1), which comprises the following steps:
(1) drying the serpentine tailing fine powder and sludge in an oven at 150 ℃ respectively, and mixing to obtain a dry solid waste raw material; mixing the solid waste raw material with clay, silicon carbide powder and water, grinding, bagging and sealing to obtain a mixture;
(2) putting the mixture into a granulator to prepare a ceramsite blank;
(3) putting the ceramsite blank into an oven, drying at 150 ℃, then putting into a muffle furnace for high-temperature sintering molding, cooling to room temperature, and grading according to different particle sizes to obtain a ceramsite material product;
wherein, the high-temperature sintering adopts sectional heating: the temperature rise rate is 10 plus or minus 0.5 ℃/min from 0 ℃ to 400 ℃; the temperature rise rate is 3 plus or minus 0.5 ℃/min from 400 ℃ to 600 ℃; the temperature rise rate is 12 plus or minus 0.5 ℃/min from 600 ℃ to 950 ℃; the temperature rise rate is 4 plus or minus 0.5 ℃/min from 950 to 1200 ℃; keeping at 1200 deg.C for 60 min.
Example 2
The embodiment provides a ceramsite material which is prepared from the following raw materials in percentage by mass: 65% of serpentine tailings, 30% of sludge and 5% of clay; to each kilogram of the raw material was added 0.3% silicon carbide powder and 16% water.
The preparation method of the ceramsite material is the same as that in example 1.
Example 3
The embodiment provides a ceramsite material which is prepared from the following raw materials in percentage by mass: 75% of serpentine tailings, 20% of sludge and 5% of clay; to each kilogram of the raw material was added 0.5% silicon carbide powder and 18% water.
The preparation method of the ceramsite material is the same as that in example 1.
Comparative example 1
This comparative example provides a ceramsite material which differs from example 1 only in that: 60% of serpentine tailings, 35% of sludge and 5% of clay; to each kilogram of the raw material was added 0.5% silicon carbide powder and 18% water.
Test example 1
The performance of the ceramsite materials of examples 1-3 and comparative example 1 is tested in the test example, and is specifically shown in table 1;
TABLE 1 Performance test of ceramsite materials of examples 1-3 and comparative example 1
| Bulk Density (g/cm)3) | Porosity of the alloy | Barrel pressure intensity (MPa) | |
| Example 1 | 1.65 | 46％ | 4.4 |
| Example 2 | 1.76 | 41％ | 5.1 |
| Example 3 | 1.52 | 52％ | 4.1 |
| Comparative example 1 | 1.43 | 59％ | 3.2 |
Although the invention has been described in detail hereinabove by way of general description, specific embodiments and experiments, it will be apparent to those skilled in the art that many modifications and improvements can be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (5)
1. The ceramsite material is characterized by being prepared from the following raw materials in percentage by mass: 65-75% of serpentine tailings, 20-30% of sludge and 4-6% of clay; the serpentine tailings are added in the form of serpentine tailing fine powder;
adding pore-forming agent and water into the raw materials; the addition amount of the pore-forming agent in each kilogram of the raw materials is 0.3-0.5%, and the addition amount of water is 16-18%;
the preparation method of the ceramsite material comprises the following steps:
(1) drying the serpentine tailing fine powder and sludge respectively, and mixing to obtain a dry solid waste raw material; mixing the solid waste raw material with clay, a pore-forming agent and water, and grinding to obtain a mixture;
(2) putting the mixture into a granulator to prepare a ceramsite blank;
(3) drying the ceramsite blank, and sintering at high temperature;
wherein, the high-temperature sintering adopts sectional heating: the temperature rise rate is 10 plus or minus 0.5 ℃/min from 0 ℃ to 400 ℃; the temperature rise rate is 3 plus or minus 0.5 ℃/min from 400 ℃ to 600 ℃; the temperature rise rate is 12 plus or minus 0.5 ℃/min from 600 ℃ to 950 ℃; the temperature rise rate is 4 plus or minus 0.5 ℃/min from 950 to 1200 ℃; keeping the temperature at 1200 ℃ for 55-65 min.
2. The ceramsite material according to claim 1, wherein the pore-forming agent is silicon carbide powder.
3. The method for preparing the ceramsite material according to claim 1 or 2, which comprises the following steps:
(1) drying the serpentine tailing fine powder and sludge respectively, and mixing to obtain a dry solid waste raw material; mixing the solid waste raw material with clay, a pore-forming agent and water, and grinding to obtain a mixture;
(2) putting the mixture into a granulator to prepare a ceramsite blank;
(3) drying the ceramsite blank, and sintering at high temperature;
wherein, the high-temperature sintering adopts sectional heating: the temperature rise rate is 10 plus or minus 0.5 ℃/min from 0 ℃ to 400 ℃; the temperature rise rate is 3 plus or minus 0.5 ℃/min from 400 ℃ to 600 ℃; the temperature rise rate is 12 plus or minus 0.5 ℃/min from 600 ℃ to 950 ℃; the temperature rise rate is 4 plus or minus 0.5 ℃/min from 950 to 1200 ℃; keeping the temperature at 1200 ℃ for 55-65 min.
4. The preparation method according to claim 3, wherein the particle size of the ground mixture is 150-200 mesh.
5. The preparation method according to claim 3, wherein the drying temperature in the step (1) is 140-160 ℃;
and/or the drying temperature in the step (3) is 140-160 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911350750.0A CN111116170B (en) | 2019-12-24 | 2019-12-24 | Ceramsite material prepared from serpentine tailings and sludge and preparation method thereof |
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| CN111715178A (en) * | 2020-07-06 | 2020-09-29 | 江西理工大学 | Copper smelting waste residue based adsorption material and preparation method thereof |
| CN112939622A (en) * | 2021-01-25 | 2021-06-11 | 肇庆市武大环境技术研究院 | Method for preparing ceramsite by using chromium-containing sludge |
| CN113563867B (en) * | 2021-08-31 | 2022-11-22 | 西南科技大学 | High-strength magnesium aluminum silicate proppant and preparation method thereof |
| CN113666730A (en) * | 2021-08-31 | 2021-11-19 | 西南科技大学 | High-strength oil fracturing magnesium aluminum silicate proppant and preparation method thereof |
| CN113896443A (en) * | 2021-08-31 | 2022-01-07 | 江西盖亚环保科技有限公司 | Ceramsite taking slag and sludge as main materials and manufacturing process of ceramsite |
| CN113651632A (en) * | 2021-09-26 | 2021-11-16 | 西南科技大学 | Magnesium silicate ceramic material and preparation method thereof |
| CN115594519A (en) * | 2022-10-08 | 2023-01-13 | 华东交通大学（Cn） | Preparation method of sludge tailing ceramsite concrete, concrete and application |
| CN115650763A (en) * | 2022-10-27 | 2023-01-31 | 西南科技大学 | Novel ceramsite water permeable brick prepared from building solid waste and preparation method thereof |
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| CN101486563B (en) * | 2009-02-25 | 2011-07-27 | 刘阳生 | Biological haydite burned from mine tailings, and preparation and use method thereof |
| CN101618971A (en) * | 2009-07-31 | 2010-01-06 | 西安墙体材料研究设计院 | Municipal sludge expanded ceramsite and preparation method thereof |
| CN104892019B (en) * | 2015-05-27 | 2017-09-26 | 中钢集团马鞍山矿山研究院有限公司 | A kind of Superlight ceramsites all prepared by raw material of solid waste |
| CN106242514A (en) * | 2016-08-05 | 2016-12-21 | 中国科学院过程工程研究所 | A kind of composite solid waste light high-strength ceramic granule and preparation method thereof |
| CN106478142A (en) * | 2016-09-27 | 2017-03-08 | 甘肃华晨生态治理有限公司 | The production method of multi-functional quincunx serpentine tailing lightweight through hole haydite |
| CN106892617A (en) * | 2017-01-24 | 2017-06-27 | 内蒙古科韵环保材料股份公司 | A kind of environmentally friendly seepage brick and its manufacture method |
| CN108101508B (en) * | 2017-12-13 | 2020-10-27 | 北京工业大学 | Method for synchronously preparing ceramsite from cyanide tailings through roasting and recycling valuable metals |
| CN108147833B (en) * | 2018-02-11 | 2021-05-11 | 王浩 | Preparation method of iron tailing based low-temperature ceramsite |
| CN108821780A (en) * | 2018-06-21 | 2018-11-16 | 湖南双晟科技信息咨询有限公司 | A method of haydite is prepared using activated sludge |
| CN110357578A (en) * | 2019-07-17 | 2019-10-22 | 中国建筑材料科学研究总院有限公司 | Utilize the method for haydite kiln disposal of solid waste and the haydite kiln of disposal of solid waste |
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