CN113480279B - Aluminum foil sludge-based cementing material and preparation method thereof - Google Patents
Aluminum foil sludge-based cementing material and preparation method thereof Download PDFInfo
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- CN113480279B CN113480279B CN202110905796.5A CN202110905796A CN113480279B CN 113480279 B CN113480279 B CN 113480279B CN 202110905796 A CN202110905796 A CN 202110905796A CN 113480279 B CN113480279 B CN 113480279B
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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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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Abstract
The invention provides a cementing material based on aluminum foil sludge and a preparation method thereof, and the formula comprises the following components: 65-80% of aluminum sludge, 0.1-25% of construction waste regenerated micro powder, 0.1-5% of hydroxyl-terminated polydimethylsiloxane, 0.1-10% of calcium hydroxide, 0.5-20% of tetraethyl orthosilicate, 0.1-1% of pregelatinized starch and water; the method comprises the following steps: drying the aluminum foil sludge, and grinding the aluminum foil sludge to 1-10 microns in particle size; putting aluminum foil sludge, a proper amount of calcium hydroxide, tetraethyl orthosilicate, hydroxyl-terminated polydimethylsiloxane and pregelatinized starch into a ball mill, and performing ball milling and mixing to prepare mixed powder A for later use; calcining the mixed powder A at the temperature of 140-300 ℃, aging for 0.5-7d, and mixing with the regenerated micro powder to prepare mixed powder B; and mixing the mixed powder B with water, stirring to form slurry, molding and curing. The method utilizes the waste aluminum sludge as the raw material, fully utilizes the waste which is difficult to treat, changes waste into valuable, saves resources and energy, eliminates environmental pollution and is convenient to produce; solves the problem of the prior art of utilizing the aluminum foil sludge.
Description
Technical Field
The invention relates to an application process of aluminum foil sludge, in particular to a process for preparing a cementing material by adopting aluminum-containing sludge of an aluminum foil plant, belongs to the technical field of environmental engineering or building materials, and particularly relates to a cementing material based on aluminum foil sludge and a preparation method thereof.
Background
With the enhancement of the environmental protection work in China, the aluminum sludge becomes one of the bottlenecks restricting the development of aluminum foil plants. The solid waste is generated after the aluminum sludge is subjected to the processes of aluminum foil pickling, aluminum ion recovery and waste liquid treatment. The main components of the aluminum sludge are calcium sulfate dihydrate and aluminum hydroxide.
This is related to the formation process of aluminum sludge:
(1) cleaning the surface of the aluminum foil by using sulfuric acid, hydrochloric acid and nitric acid, wherein the cleaning solution contains a large amount of aluminum sulfate, aluminum chloride and aluminum nitrate;
(2) in the aluminum ion recovery process, a mode of adjusting the pH value is adopted to form aluminum hydroxide precipitate, and waste liquid is formed after filtration;
(3) and then, treating the waste liquid by using quicklime to form waste solid particles, and drying after washing.
At present, the treatment method of the aluminum sludge mainly comprises landfill and decomposition utilization. The landfill stacking means that the waste materials are washed by water, compressed into cakes, squeezed out moisture in slurry and stacked, and the mode not only causes environmental pollution, but also occupies a large amount of fields. The decomposition and utilization refers to the purification of oxides in the aluminum sludge by utilizing calcination and other chemical reactions, and the process has high energy consumption, complex steps and unobvious economic value.
The existing process for treating aluminum sludge mostly prepares pure-phase substances such as aluminum oxide, aluminum sulfate and the like by externally doping ions and appropriate chemical reaction of aluminum ions, calcium ions and sulfate ions according to a decomposition, purification and utilization mode, and does not consider directly utilizing aluminum sludge to prepare products. Therefore, how to prepare the cementing material by using the aluminum foil sludge is a problem to be solved urgently in the prior art.
Disclosure of Invention
The invention aims to provide a sludge-based cementing material utilizing aluminum foils and a preparation method thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention adopts the following technical scheme:
the aluminum foil sludge based cementing material is characterized by comprising 65-80% of aluminum sludge, 0.1-25% of construction waste regenerated micro powder, 0.1-5% of hydroxyl-terminated Polydimethylsiloxane (PDMS), 0.1-10% of calcium hydroxide, 0.5-20% of tetraethyl orthosilicate (TEOS), 0.1-1% of pregelatinized starch and water.
A preparation method of a cementing material based on aluminum foil sludge is characterized by comprising the following steps:
s1: firstly, drying aluminum foil sludge, and grinding the aluminum foil sludge to the particle size of 1-10 microns;
s2: putting aluminum foil sludge, a proper amount of calcium hydroxide, tetraethyl orthosilicate, hydroxyl-terminated Polydimethylsiloxane (PDMS) and pregelatinized starch into a ball mill, ball-milling and mixing, and adjusting the pH value to 5.5-10.5 to prepare mixed powder A for later use;
s3: calcining the mixed powder A at 40-350 ℃;
s4: then mixing the regenerated micro powder with the calcined mixed powder to prepare mixed powder B;
s5: when in use, the mixed powder B is mixed with water, stirred into slurry, and cured and solidified after molding.
After the construction waste regenerated micro powder is compounded and adjusted, the main components are calcium silicate hydrate not less than 50%, ettringite content not less than 10%, calcium hydroxide not more than 30% and the rest components less than 20%.
The hydroxyl-terminated Polydimethylsiloxane (PDMS) is oily liquid or emulsion powder, and the molecular polymerization degree of the PDMS is not higher than 10.
After the aluminum sludge is compounded, the components of the aluminum sludge are that the calcium sulfate dihydrate is higher than 75 percent, and the aluminum hydroxide is not higher than 10 percent.
The mixture ratio of the mixed powder B is as follows: the parameter of the construction waste regenerated micro powder is 0.5-40%.
The pH value of the mixed powder A is 5.5-10.5, the calcining temperature is 140-350 ℃, and the aging time is 0.5-14 d.
The invention provides a method for controlling the crystallization hydration of an aluminum sludge cementing material by adopting organic matter modification and utilizing a core-shell structure coated by a structural organic matter. Not only can the aluminum foil sludge be absorbed on a large scale, the environmental pressure is solved, but also the aluminum foil sludge is recycled, and the waste is changed into valuable.
Drawings
FIG. 1 is a flow chart of a method for preparing a cementing material based on aluminum foil sludge according to the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work based on the embodiments of the present invention belong to the scope of the present invention.
The aluminum foil sludge based cementing material is characterized by comprising 65-80% of aluminum sludge, 0.1-25% of construction waste regenerated micro powder, 0.1-5% of hydroxyl-terminated Polydimethylsiloxane (PDMS), 0.1-10% of calcium hydroxide, 0.5-20% of tetraethyl orthosilicate (TEOS), 0.1-1% of pregelatinized starch and water.
As shown in fig. 1, a method for preparing a sludge-based cementing material using aluminum foil, which is characterized in that:
s1: firstly, drying aluminum foil sludge, and grinding the aluminum foil sludge to the particle size of 1-10 microns;
s2: putting aluminum foil sludge, a proper amount of calcium hydroxide, tetraethyl orthosilicate, hydroxyl-terminated Polydimethylsiloxane (PDMS) and pregelatinized starch into a ball mill, ball-milling and mixing, and adjusting the pH value to 5.5-10.5 to prepare mixed powder A for later use;
s3: calcining the mixed powder A at 40-350 ℃;
s4: then mixing the regenerated micro powder with the calcined mixed powder to prepare mixed powder B;
s5: when in use, the mixed powder B is mixed with water, stirred into slurry, and cured and solidified after molding.
After the construction waste regenerated micro powder is compounded and adjusted, the main components are calcium silicate hydrate not less than 50%, ettringite content not less than 10%, calcium hydroxide not more than 30% and the rest components less than 20%.
The hydroxyl-terminated Polydimethylsiloxane (PDMS) is oily liquid or emulsion powder, and the molecular polymerization degree of the PDMS is not higher than 10.
After the aluminum sludge is compounded, the components of the aluminum sludge are that the calcium sulfate dihydrate is higher than 75 percent, and the aluminum hydroxide is not higher than 10 percent.
The mixture ratio of the mixed powder B is as follows: the parameter of the construction waste regenerated micro powder is 0.5-40%.
The pH value of the mixed powder A is 5.5-10.5, the calcining temperature is 140-350 ℃, and the aging time is 0.5-14 d.
Example 1
650g of aluminum sludge, 350g of construction waste regenerated micro powder, 5g of hydroxyl-terminated Polydimethylsiloxane (PDMS), 20g of tetraethyl orthosilicate (TEOS), 7g of pregelatinized starch and 450g of water are taken.
The pH values of the materials are 5.5,6.5,7.5,8.5,9.5 and 10.5 respectively, and the calcining temperature is 40 ℃, 150 ℃ and 300 ℃. The performance test was performed according to the national standard GB/T17996-1999. The results are shown in tables 1, 2 and 3.
TABLE 1 Effect of calcination temperature of 40 ℃ and pH on the Properties of the cementitious Material
TABLE 2 calcination temperature of 150 ℃ and influence of pH on the Binder Properties
TABLE 3 calcination temperature of 300 ℃ and influence of pH on the Binder Properties
Example 2
800g of aluminum sludge, 200g of construction waste regenerated micro powder, 1g of Polydimethylsiloxane (PDMS), 0.5g, 5g and 10g of tetraethyl orthosilicate (TEOS). 1g of pregelatinized starch and 450g of water. The amount of calcium hydroxide was adjusted to pH 9.5 and the calcination temperature was 40 deg.C, 150 deg.C and 300 deg.C.
The performance test was performed according to the national standard GB/T17996-1999, with the results shown in Table 4.
TABLE 4 calcination temperature of 150 ℃ and the effect of TEOS addition on the performance of the cement
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the preferred embodiments of the invention and described in the specification are only preferred embodiments of the invention and are not intended to limit the invention, and that various changes and modifications may be made without departing from the novel spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The aluminum foil sludge-based cementing material is characterized by comprising the following components in percentage by weight: 65-80% of aluminum sludge, 0.1-25% of construction waste regenerated micro powder, 0.1-5% of hydroxyl-terminated polydimethylsiloxane PDMS, 0.1-10% of calcium hydroxide, 0.5-20% of tetraethyl orthosilicate TEOS, 0.1-1% of pregelatinized starch and the balance of water.
2. The method for preparing the aluminum foil sludge-based cementing material according to the claim 1, which is characterized in that:
s1: firstly, drying the aluminum sludge, and grinding the aluminum sludge to the particle size of 1-10 microns;
s2: placing aluminum sludge, calcium hydroxide, tetraethyl orthosilicate TEOS, hydroxyl-terminated polydimethylsiloxane PDMS and pregelatinized starch in a ball mill, ball-milling and mixing, and adjusting the pH value to 5.5-10.5 to prepare mixed powder A for later use;
s3: calcining the mixed powder A at 40-350 ℃;
s4: then mixing the construction waste regenerated micro powder with the calcined mixed powder to prepare mixed powder B;
s5: when in use, the mixed powder B is mixed with water, stirred into slurry, and cured and solidified after molding.
3. The method for preparing the aluminum foil sludge-based cementing material according to the claim 2, which is characterized in that: after the construction waste regenerated micro powder is compounded and adjusted, the main components are as follows: the calcium silicate hydrate is not less than 50 percent, the content of ettringite is not less than 10 percent, the content of calcium hydroxide is not more than 30 percent, and the rest components are less than 20 percent.
4. The method for preparing the aluminum foil sludge-based gelling material of claim 2, wherein the hydroxyl-terminated polydimethylsiloxane PDMS is an oily liquid or latex powder, and the molecular polymerization degree of the PDMS is not higher than 10.
5. The preparation method of the aluminum foil sludge-based cementing material according to claim 2, wherein the aluminum sludge is compounded and comprises the following components: the calcium sulfate dihydrate is higher than 75 percent, and the aluminum hydroxide is not higher than 10 percent.
6. The preparation method of the aluminum foil sludge-based cementing material according to claim 2, wherein the mixture ratio of the mixed powder B is as follows: the mixing amount of the construction waste regenerated micro powder is 0.5 to 40 percent.
7. The method for preparing aluminum foil sludge-based gelling material as claimed in claim 2, wherein the pH of the powder mixture A is 5.5-10.5, the calcination temperature is 140-350 ℃, and the aging time is 0.5-14 d.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2090301A (en) * | 1980-12-15 | 1982-07-07 | Okamura Tatsuro | Production of light-weight building materials from aluminium hydroxide sludge |
| KR20080034228A (en) * | 2006-10-16 | 2008-04-21 | 조대연 | The manufacturing method of construction materials using waterworks sludge |
| CN102775101A (en) * | 2012-08-03 | 2012-11-14 | 黄靖宇 | Baking-free brick made of aluminum sludge of water works |
| CN105923658A (en) * | 2016-04-29 | 2016-09-07 | 湖南省小尹无忌环境能源科技开发有限公司 | Material utilization method for electroplating sludge |
| CN107698182A (en) * | 2017-09-27 | 2018-02-16 | 武汉鹏森环境科技有限公司 | A kind of dirty mud environment protection type binder materials and preparation method thereof |
| CN112279583A (en) * | 2020-10-12 | 2021-01-29 | 绍兴文理学院 | Self-compacting concrete prepared from aluminum sludge |
| CN112321258A (en) * | 2020-10-12 | 2021-02-05 | 绍兴文理学院 | Green concrete prepared from waterworks sludge |
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2021
- 2021-08-09 CN CN202110905796.5A patent/CN113480279B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2090301A (en) * | 1980-12-15 | 1982-07-07 | Okamura Tatsuro | Production of light-weight building materials from aluminium hydroxide sludge |
| KR20080034228A (en) * | 2006-10-16 | 2008-04-21 | 조대연 | The manufacturing method of construction materials using waterworks sludge |
| CN102775101A (en) * | 2012-08-03 | 2012-11-14 | 黄靖宇 | Baking-free brick made of aluminum sludge of water works |
| CN105923658A (en) * | 2016-04-29 | 2016-09-07 | 湖南省小尹无忌环境能源科技开发有限公司 | Material utilization method for electroplating sludge |
| CN107698182A (en) * | 2017-09-27 | 2018-02-16 | 武汉鹏森环境科技有限公司 | A kind of dirty mud environment protection type binder materials and preparation method thereof |
| CN112279583A (en) * | 2020-10-12 | 2021-01-29 | 绍兴文理学院 | Self-compacting concrete prepared from aluminum sludge |
| CN112321258A (en) * | 2020-10-12 | 2021-02-05 | 绍兴文理学院 | Green concrete prepared from waterworks sludge |
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