CN111634933B - Method for preparing calcium aluminate by using PAC (polyaluminium chloride) acid waste residues and calcium aluminate - Google Patents

Method for preparing calcium aluminate by using PAC (polyaluminium chloride) acid waste residues and calcium aluminate Download PDF

Info

Publication number
CN111634933B
CN111634933B CN202010466050.4A CN202010466050A CN111634933B CN 111634933 B CN111634933 B CN 111634933B CN 202010466050 A CN202010466050 A CN 202010466050A CN 111634933 B CN111634933 B CN 111634933B
Authority
CN
China
Prior art keywords
pac
calcium aluminate
waste residue
calcium
raw material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202010466050.4A
Other languages
Chinese (zh)
Other versions
CN111634933A (en
Inventor
高建阳
王少武
陈玉海
郑霞
袁崇良
刁克建
李颍
纪蒙
岳巍
姚毅
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chalco Shandong Co ltd
Original Assignee
Chalco Shandong Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chalco Shandong Co ltd filed Critical Chalco Shandong Co ltd
Priority to CN202010466050.4A priority Critical patent/CN111634933B/en
Publication of CN111634933A publication Critical patent/CN111634933A/en
Application granted granted Critical
Publication of CN111634933B publication Critical patent/CN111634933B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F7/00—Compounds of aluminium
    • C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
    • C01F7/16—Preparation of alkaline-earth metal aluminates or magnesium aluminates; Aluminium oxide or hydroxide therefrom
    • C01F7/164—Calcium aluminates
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Processing Of Solid Wastes (AREA)
  • Treatment Of Sludge (AREA)

Abstract

The invention specifically relates to a method for preparing calcium aluminate by using PAC acidic waste residues and the calcium aluminate, which belong to the field of light metal metallurgy and comprise the following steps: mixing PAC acid waste residue, a calcium source and an auxiliary agent to obtain a mixed raw material, wherein chemical elements of the mixed raw material comprise AI, Ca and Fe, the molar ratio of the AI to the Ca is 0.5-2.5: 1, the molar ratio of the Fe to the AI is 0.1-0.5: 1, and the auxiliary agent comprises at least one of the following components: red mud and silicon slag; and sequentially carrying out primary grinding, sintering and secondary grinding on the mixed raw material to obtain calcium aluminate, thereby completing the regeneration of the PAC acidic waste residue. Has the following effects: on one hand, the components of aluminum oxide and calcium oxide in the PAC acid waste residue are recycled, so that waste is changed into valuable, and the added value of the product is improved; on the other hand, effective elements in the red mud and the silicon slag are cooperatively utilized, and the resource utilization of the red mud and the silicon slag is realized; thirdly, the calcium aluminate prepared by the method has the acid solubility of about 90 percent, can be used as a raw material for preparing PAC, and realizes the cyclic utilization of resources.

Description

Method for preparing calcium aluminate by using PAC acid waste residues and calcium aluminate
Technical Field
The invention belongs to the field of light metal metallurgy, and particularly relates to a method for preparing calcium aluminate by using PAC (polyaluminium chloride) acid waste residues and calcium aluminate.
Background
In the process of producing PAC (polyaluminium chloride) by taking calcium aluminate as a raw material, 15-20 wt% of PAC acid waste residues are generated and have great harm to the environment, at present, for the treatment of the PAC acid waste residues, a very small amount of residues are used as cement raw materials, and are mixed with lime to be used as raw materials, a small amount of the raw materials are mixed and then are sintered into cement, and a large amount of the PAC acid waste residues are discharged and stockpiled.
Therefore, there is a need in the art for an economical and efficient method for regenerating PAC waste residues in polyaluminum chloride production, which prevents resource waste and environmental pollution.
Chinese patent CN2013104863655 discloses a baking-free brick using polyaluminium chloride waste residue and red mud as main materials and a preparation method thereof, the baking-free brick is prepared by using the polyaluminium chloride waste residue and the red mud as raw materials, so that the accumulation of the red mud and PAC waste residue is reduced, the problem of environmental pollution caused by the discharge of the red mud and PAC waste residue is solved, but the PAC acid waste residue is not used for preparing the PAC special calcium aluminate.
Disclosure of Invention
In view of the above problems, the present invention has been made to provide a method for preparing PAC specific calcium aluminate from PAC spent acid slag, which overcomes or at least partially solves the above problems.
The embodiment of the invention provides a method for preparing calcium aluminate by using PAC acid waste residues and the calcium aluminate, comprising the following steps:
mixing PAC acid waste residue, a calcium source and an auxiliary agent to obtain a mixed raw material, wherein chemical elements of the mixed raw material comprise Al, Ca and Fe, the molar ratio of Al to Ca is 0.5-2.5: 1, the molar ratio of Fe to Al is 0.1-0.5: 1, and the auxiliary agent comprises at least one of the following components: red mud and silicon slag;
and sequentially carrying out primary grinding, sintering and secondary grinding on the mixed raw material to obtain the calcium aluminate.
Further, the molar ratio of Al to Ca is 1-2: 1.
Further, the molar ratio of Fe to AI is 0.1-0.3: 1.
Further, the calcium source comprises at least one of: calcium carbonate, calcium oxide, calcium hydroxide.
Further, the PAC acid waste residue is waste residue with a pH value less than 7 generated in the process of producing polyaluminium chloride by taking calcium aluminate as a raw material.
Further, in the primary grinding, the mixed raw material is ground until the particle size d50 is 10-100 um.
Further, the particle size d50 is 30-60 um.
Furthermore, in the sintering, the sintering temperature is 1100-1350 ℃, and the sintering time is 0.3-4 h.
Further, the sintering temperature is 1250-1300 ℃, and the sintering time is 0.5-1.5 h.
Based on the same inventive concept, the embodiment of the invention also provides a method for preparing calcium aluminate by the method, wherein the particle size d50 of the calcium aluminate is 10-80 um.
One or more technical solutions in the embodiments of the present invention at least have the following technical effects or advantages:
according to the method for preparing calcium aluminate by using PAC acidic waste residues and the calcium aluminate, provided by the embodiment of the invention, on one hand, the components of alumina and calcium oxide in the PAC acidic waste residues are recycled, so that waste is changed into valuable, and the additional value of products is improved; on the other hand, the effective elements in the red mud and the silicon slag are utilized synergistically, and the resource utilization of the red mud and the silicon slag is realized; thirdly, the calcium aluminate prepared by the method has the acid solubility of about 90 percent, can be used as a raw material for preparing PAC, and realizes the cyclic utilization of resources.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a flow chart of the preparation of PAC-specific calcium aluminate from PAC acid waste residues in the embodiment of the invention.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments and examples, and the advantages and various effects of the present invention will be more clearly apparent therefrom. It will be understood by those skilled in the art that these specific embodiments and examples are for the purpose of illustrating the invention and are not to be construed as limiting the invention.
Throughout the specification, unless otherwise specifically noted, terms used herein should be understood as having meanings as commonly used in the art. Accordingly, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. If there is a conflict, the present specification will control.
Unless otherwise specifically indicated, various raw materials, reagents, instruments, equipment and the like used in the present invention may be commercially available or may be prepared by existing methods.
In the present invention, the terms "first", "second", etc. do not denote any order or order, but rather are used as terms of the words.
In one aspect, the present embodiment provides a method for preparing calcium aluminate by using PAC slag, and calcium aluminate, and fig. 1 is a flow chart of preparing PAC specific calcium aluminate by using PAC slag according to an embodiment of the present invention, as shown in fig. 1, the method including the steps of:
s1, mixing the PAC acid waste residue, a calcium source and an auxiliary agent to obtain a mixed raw material, wherein chemical elements of the mixed raw material comprise AI, Ca and Fe, the molar ratio of Al to Ca is 0.5-2.5: 1, the thickness molar ratio of Fe to AI is 0.1-0.5: 1, and the auxiliary agent comprises at least one of the following components: red mud and silicon slag;
and S2, sequentially carrying out primary grinding, sintering and secondary grinding on the mixed raw material to obtain the calcium aluminate.
The reason for mixing the PAC waste, the calcium source and the auxiliary is that:
the method can promote the regeneration of PAC acid waste residue containing C 2 A、C 12 A 7 The main phase components contain chemical compositions with Al and Ca content of more than 65 percent, are suitable to be used as basic raw materials of the calcium aluminate clinker, and can generate mixed raw materials by the synergistic action of the red mud and the silicon slagThe mixed raw material is sintered at a proper high temperature to prepare the calcium aluminate powder for the water purifying agent. Because beneficial phase composition in the calcium aluminate clinker exists in the PAC acid waste residue, the realization of a seed crystal epitaxial sintering technology in the sintering process is promoted, the sintering temperature is lower, and the clinker phase is purer;
the reason why the molar ratio of Al and Ca is limited to 0.5-2.5: 1 and the molar ratio of Fe and AI is limited to 0.1-0.5: 1 is that:
the molar ratio of Al to Ca is 0.5-2.5: 1, and too large a ratio easily causes the change of the components of the sintered clinker, so that easily soluble phases are not easily generated, and excessive A is generated 2 C, the acid dissolution rate of clinker is greatly reduced; when the value is too small, a large amount of free calcium is easily generated in the process of sintering clinker, so that the effective components of AI in the clinker are reduced, and the aluminum content of the PAC finished product is unqualified;
the molar ratio of Fe to Al is 0.1-0.5: 1, and the value is too large or too small, which not only has certain influence on the calcium aluminate firing system, but also is difficult to accurately adjust the product parameters when preparing the PAFC product, thereby causing difficulty in production.
As an alternative embodiment, the molar ratio of Al to Ca is 1-2: 1.
As an alternative embodiment, the molar ratio of Fe to AI is between 0.1 and 0.3: 1.
As an alternative embodiment, the calcium source comprises at least one of: calcium carbonate, calcium oxide, calcium hydroxide.
The reason for selecting the above calcium source is: the chemical components are stable, and the raw materials are easy to obtain and the resources are sufficient.
As an alternative embodiment, the PAC acid waste residue is waste residue with a pH value less than 7 generated in the process of producing polyaluminium chloride by taking calcium aluminate as a raw material.
As an alternative embodiment, in the primary grinding, the mixed raw material is ground to have a particle size d50 of 10-100 um.
The reason why the primary grinding is carried out until the particle diameter d50 of the mixed raw material is 10-100um is:
the clinker sintering is a semi-liquid phase sintering process, the fineness of the raw materials determines the sintering activity, and the finer raw materials can improve the sintering activity, promote the generation of a calcium aluminate phase and reduce the sintering temperature. However, the energy consumption of grinding is easily increased greatly by the excessively fine materials, and the economical efficiency is reduced.
As an alternative embodiment, the particle size d50 is 30-60 um.
As an optional implementation mode, in the sintering process, the sintering temperature is 1100-1350 ℃, and the sintering time is 0.3-4 h.
The reason why the sintering temperature and the sintering time are defined as the above ranges is that:
the selection of the sintering temperature and the sintering time can meet the realization of the product quality and the process system to the maximum extent.
As an optional implementation mode, the sintering temperature is 1250-1300 ℃, and the sintering time is 0.5-1.5 h.
In another aspect, the embodiment of the present invention further provides a method for preparing calcium aluminate with a particle size d50 of 10-80 um. .
The particle size of calcium aluminate is an index for evaluating the dispersibility thereof, and the smaller the particle size is, the more excellent the dispersibility thereof is. The particle size d50 of the calcium aluminate is 10-80um, which shows that the prepared calcium aluminate has excellent dispersion performance.
A method for preparing calcium aluminate using PAC waste slag and calcium aluminate according to the present application will be described in detail with reference to specific examples.
Example 1
100 g of PAC acid waste residue, 30 g of calcium carbonate, 10 g of sintering process red mud, 10 g of Bayer process red mud and 5 g of silicon slag are mixed, and the granularity is controlled as follows: d 50: 60um, preparing raw materials, wherein the molar ratio of AI to Ca in the raw materials is about 1.26: 1, and the molar ratio of Fe to AI is about 0.28: 1;
controlling the roasting heat preservation temperature: 1260 ℃, sintering time of 1 hour, grinding to control granularity d 50: 80 um. 128 g of finished calcium aluminate is obtained.
Example 2
Mixing 130 g of PAC acid waste residue, 20g of calcium carbonate, 40 g of sintering process red mud, 20g of Bayer process red mud and 8 g of silicon slag, and controlling the granularity: d 50: 20um, preparing raw materials, wherein the mol ratio of Al to Ca in the raw materials is about 1.28: 1, and the mol ratio of Fe to Al is about 0.25: 1;
controlling the roasting heat preservation temperature: the sintering time is 0.5 hour at 1300 ℃, and the particle size d 50: 40um is ground and controlled after the clinker is sintered. 154 g of finished calcium aluminate is obtained.
Example 3
Mixing 136 g of PAC acid waste residue, 25 g of calcium carbonate, 40 g of calcium oxide, 18 g of sintering red mud and 6 g of silicon slag, and controlling the granularity: d 50: 100um, preparing raw materials, wherein the mol ratio of Al to Ca in the raw materials is about 1.30: 1, and the mol ratio of Fe to Al is about 0.26: 1;
controlling the roasting heat preservation temperature: 1260 ℃, sintering for 1 hour, grinding the clinker after sintering to control the granularity d 50: 80 um. 128 g of finished calcium aluminate is obtained.
Example 4
Mixing 170 g of PAC acid waste residue, 20g of calcium hydroxide and 6 g of silicon slag, and controlling the particle size: d 50: 10um, preparing raw materials, wherein the molar ratio of Al to Ca in the raw materials is about 1.56: 1, and the molar ratio of Fe to AI is about 0.21: 1;
controlling the roasting heat preservation temperature: 1260 ℃, sintering time
After 1 hour, the clinker is sintered, and the particle size d 50: 10um is controlled by grinding. 128 g of finished calcium aluminate is obtained.
Example 5
100 g of PAC acid waste residue, 30 g of calcium carbonate, 10 g of sintering process red mud, 10 g of Bayer process red mud and 5 g of silicon slag are mixed, and the granularity is controlled as follows: d 50: 60um, preparing raw materials, wherein the molar ratio of AI to Ca in the raw materials is 0.5: 1, and the molar ratio of Fe to Al is 0.1: 1;
controlling the roasting heat preservation temperature: 1260 ℃, sintering for 1 hour, grinding the clinker after sintering to control the granularity d 50: 80 um. 128 g of finished calcium aluminate is obtained.
Example 6
100 g of PAC acid waste residue, 30 g of calcium carbonate, 10 g of sintering process red mud, 10 g of Bayer process red mud and 5 g of silicon slag are mixed, and the granularity is controlled as follows: d 50: 60um, preparing raw materials, wherein the molar ratio of AI to Ca in the raw materials is 2.5: 1, and the molar ratio of Fe to AI is 0.5: 1;
controlling the roasting heat preservation temperature: 1260 ℃, sintering for 1 hour, grinding the clinker after sintering to control the granularity d 50: 80 um. 128 g of finished calcium aluminate is obtained.
Example 7
100 g of PAC acid waste residue, 30 g of calcium carbonate, 10 g of sintering process red mud, 10 g of Bayer process red mud and 5 g of silicon slag are mixed, and the granularity is controlled as follows: d 50: 60um, preparing raw materials, wherein the molar ratio of AI to Ca in the raw materials is about 1.26: 1, and the molar ratio of Fe to AI is about 0.28: 1;
the sintering temperature is controlled at 1100 ℃, the sintering time is 0.3h, and after the clinker is sintered, the grinding is carried out to control the granularity d 50: 80 um. 128 g of finished calcium aluminate is obtained.
Example 8
100 g of PAC acid waste residue, 30 g of calcium carbonate, 10 g of sintering process red mud, 10 g of Bayer process red mud and 5 g of silicon slag are mixed, and the granularity is controlled as follows: d 50: 60um, preparing raw materials, wherein the mol ratio of Al to Ca in the raw materials is about 1.26: 1, and the mol ratio of Fe to Al is about 0.28: 1;
the sintering temperature is controlled to 1350 ℃, the sintering time is 4h, and after the clinker is sintered, the particle size d 50: 80um is ground. 128 g of finished calcium aluminate is obtained.
Comparative example 1
This comparative example differs from example 1 in that: in the raw meal, the molar ratio of Al to Ca was about 2.9: 1, and the molar ratio of Fe to Al was about 0.7: 1.
Comparative example 2
This comparative example differs from example 1 in that: only PAC acid waste residue is used for preparing raw materials.
Comparative example 3
This comparative example differs from example 1 in that: the calcination temperature was controlled at 1450 ℃.
Effect experiment:
the calcium aluminates obtained in examples 1 to 4 and comparative examples 1 to 3 were subjected to acid solubility test and particle size measurement, and the test results are shown in table 1.
The acid solubility detection method comprises the following steps: detecting the percentage content of effective elements in the calcium aluminate clinker by an acid-base titration method; XRD detection for clinker soluble phase generation analysis; the acid dissolution rate is measured and a certain amount of 36.0% hydrochloric acid is prepared into suitable hydrochloric acid with a certain concentration, 20g of calcium aluminate powder is added, the calcium aluminate powder is subjected to acid dissolution at a constant temperature of 90 ℃ for 1.0 hour, after filtration, a filter cake is washed to be neutral by deionized water, the filter cake is dried and weighed, the dry weight of the filter cake is calculated, and the using performance of the calcium aluminate is determined by detecting the acid dissolution rate of the calcium aluminate.
TABLE 1
Acid solubility%
Example 1 88.6
Example 2 87.3
Example 3 89.2
Example 4 88.6
Example 5 88.6
Example 6 88.8
Example 7 89.0
Example 8 87.6
Comparative example 1 78.2
Comparative example 2 76.5
Comparative example 3 82.3
In table 1, the acid solubility of calcium aluminate is an important index of calcium aluminate performance, and higher acid solubility indicates better calcium aluminate performance.
As can be seen from Table 1, the acid solubility of the calcium aluminates obtained in examples 1 to 8 was up to 89.2%, and the polyaluminum chloride (PAC) prepared therefrom had an increased dissolution rate and excellent usability.
In comparative example 1, the molar ratio of Al and Ca and the molar ratio of Fe and Al are not within the claimed scope of the present invention, and the acid solubility of the calcium aluminate prepared in comparative example 1 is lower by 10.4% compared with the calcium aluminate prepared in example 1, which shows that the molar ratio of AI and Ca and the molar ratio of Fe and Al are key factors influencing the inventive property of the present invention, and too high value thereof is too low, which results in the obvious decrease of the acid solubility of the calcium aluminate prepared.
In comparative example 2, no calcium source, red mud and silicon slag are added into the PAC acidic waste residue, and the acid solubility of the calcium aluminate prepared in comparative example 2 is 12.1% lower than that of the calcium aluminate prepared in example 1, which indicates that the calcium source, the red mud and the silicon slag have a specific synergistic effect with the PAC acidic waste residue, and the acid solubility of the prepared calcium aluminate is reduced if only the PAC acidic waste residue is used.
In comparative example 3, the roasting temperature is higher than the highest value of the claimed temperature range, and it can be seen from the data in table 1 of comparative example 1 and comparative example 3 that the roasting temperature also affects the acid solubility of calcium aluminate to some extent.
Finally, it should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (7)

1. A method for preparing calcium aluminate by using PAC acid waste residue is characterized by comprising the following steps:
mixing the PAC acid waste residue, a calcium source and an auxiliary agent to obtain a mixed raw material, wherein chemical elements of the mixed raw material comprise Al, Ca and Fe, and the molar ratio of the Al to the Ca is 0.5-2.5: 1, the molar ratio of Fe to Al is 0.1-0.5: 1, the auxiliary agent is red mud and silicon slag;
sequentially carrying out primary grinding, sintering and secondary grinding on the mixed raw material to obtain calcium aluminate;
the calcium source comprises at least one of: calcium carbonate, calcium oxide, calcium hydroxide;
in the sintering process, the sintering temperature is 1100-1350 ℃, and the sintering time is 0.3-4 h.
2. The method for preparing calcium aluminate by using PAC acid waste residue as claimed in claim 1, wherein the molar ratio of Al to Ca is 1-2: 1.
3. the method for preparing calcium aluminate by using PAC acid waste residue as claimed in claim 1, wherein the molar ratio of Fe to Al is 0.1-0.3: 1.
4. the method for preparing calcium aluminate by using PAC acid waste residue as claimed in claim 1, wherein the PAC acid waste residue is waste residue with pH value less than 7 generated in the process of producing polyaluminium chloride by using calcium aluminate as raw material.
5. The method of claim 1, wherein the primary grinding is performed until the particle size d50 of the mixed raw material is 10-100 μm.
6. The method for preparing calcium aluminate by using PAC acid waste residue as claimed in claim 5, wherein the particle size d50 is 30-60 μm.
7. The method as claimed in claim 6, wherein the sintering temperature is 1250-.
CN202010466050.4A 2020-05-27 2020-05-27 Method for preparing calcium aluminate by using PAC (polyaluminium chloride) acid waste residues and calcium aluminate Active CN111634933B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010466050.4A CN111634933B (en) 2020-05-27 2020-05-27 Method for preparing calcium aluminate by using PAC (polyaluminium chloride) acid waste residues and calcium aluminate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010466050.4A CN111634933B (en) 2020-05-27 2020-05-27 Method for preparing calcium aluminate by using PAC (polyaluminium chloride) acid waste residues and calcium aluminate

Publications (2)

Publication Number Publication Date
CN111634933A CN111634933A (en) 2020-09-08
CN111634933B true CN111634933B (en) 2022-08-30

Family

ID=72325016

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010466050.4A Active CN111634933B (en) 2020-05-27 2020-05-27 Method for preparing calcium aluminate by using PAC (polyaluminium chloride) acid waste residues and calcium aluminate

Country Status (1)

Country Link
CN (1) CN111634933B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114655973B (en) * 2022-04-27 2024-01-09 河南爱尔福克化学股份有限公司 Method and device for recycling filter residues in polyaluminum chloride production

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008001566A (en) * 2006-06-23 2008-01-10 Denki Kagaku Kogyo Kk Alumina cement, alumina cement composition and monolithic refractory using the same
CN103553492A (en) * 2013-10-16 2014-02-05 山东大学 Braking-free brick mainly prepared from polyaluminum chloride waste residues and red mud and preparation method thereof
WO2015165153A1 (en) * 2014-04-30 2015-11-05 东北大学 Method for recycling alkali and aluminum during treatment of bayer red mud by using calcification-carbonization process
CN106006689A (en) * 2016-05-17 2016-10-12 常州清流环保科技有限公司 Preparation method of calcium aluminate for water treatment agent
JP2018002547A (en) * 2016-07-01 2018-01-11 デンカ株式会社 Manufacturing method of calcium aluminate
CN108101084A (en) * 2018-01-10 2018-06-01 浙江海翔净水科技有限公司 A kind of method that high purity calcium aluminate is prepared using rotary kiln
CN110642279A (en) * 2018-06-26 2020-01-03 尧柏特种水泥技术研发有限公司 Production method of calcium aluminate for high-performance water treatment agent

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008001566A (en) * 2006-06-23 2008-01-10 Denki Kagaku Kogyo Kk Alumina cement, alumina cement composition and monolithic refractory using the same
CN103553492A (en) * 2013-10-16 2014-02-05 山东大学 Braking-free brick mainly prepared from polyaluminum chloride waste residues and red mud and preparation method thereof
WO2015165153A1 (en) * 2014-04-30 2015-11-05 东北大学 Method for recycling alkali and aluminum during treatment of bayer red mud by using calcification-carbonization process
CN106006689A (en) * 2016-05-17 2016-10-12 常州清流环保科技有限公司 Preparation method of calcium aluminate for water treatment agent
JP2018002547A (en) * 2016-07-01 2018-01-11 デンカ株式会社 Manufacturing method of calcium aluminate
CN108101084A (en) * 2018-01-10 2018-06-01 浙江海翔净水科技有限公司 A kind of method that high purity calcium aluminate is prepared using rotary kiln
CN110642279A (en) * 2018-06-26 2020-01-03 尧柏特种水泥技术研发有限公司 Production method of calcium aluminate for high-performance water treatment agent

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
物料配比对铝酸钙炉渣浸出和自粉性能的影响;王波等;《东北大学学报( 自然科学版)》;20081231;第29卷;第1593-1596页 *

Also Published As

Publication number Publication date
CN111634933A (en) 2020-09-08

Similar Documents

Publication Publication Date Title
US7871583B2 (en) Process for recovery of silica followed by alumina from coal fly ash
CN107021654B (en) A kind of sulphur calcium silicates sulphate aluminium cement and preparation method thereof
CN111186850B (en) Magnesium oxide for oriented silicon steel annealing separant and preparation method thereof
CN109433213B (en) Method for selectively dealkalizing red mud and enriching iron
CN100384738C (en) Preparation method of ultrafine alpha-Al2O3 powder and obtained product
CN111634933B (en) Method for preparing calcium aluminate by using PAC (polyaluminium chloride) acid waste residues and calcium aluminate
CN114988886B (en) Preparation method of high-purity alpha-alumina powder capable of being sintered at low temperature
CN111302678A (en) In-situ oxidation modified steel slag and preparation method and application thereof
EP3438291B1 (en) Magnesium oxide for annealing separator, and grain-oriented electromagnetic steel sheet
CN109179463A (en) A kind of method of Bayer-red mud alkali soluble tandem process processing bauxite resource
CN116375061A (en) Magnesium oxide for annealing separating agent and oriented electrical steel
JP2019173172A (en) Magnesium oxide for annealing separation agent, and manufacturing method of directional electromagnetic steel sheet
JP2005001949A (en) Magnesium oxide powder and method of manufacturing the same
RU2245392C2 (en) Aggregate of particles of magnesia
CN110357131A (en) A kind of nano-sized magnesium hydroxide slurry and its preparation method and application
CN110342902B (en) Ceramic grinding ball and preparation method thereof
CN103496727A (en) Preparation method for microcrystal alpha-Al2O3 aggregation
CN106032285A (en) Method for recovering alumina
CN114096641B (en) Strontium aluminate mixed oxide and preparation method thereof
CN111217394B (en) high-Fischer low-apparent-density ammonium paratungstate and production method and equipment thereof
CN105271290B (en) Method for preparing analcite through high-alumina fly ash
CN109553121A (en) A kind of preparation method of high-purity low-sodium aluminum hydroxide
CN103952084B (en) A kind of preparation method of metal-polishing liquid of alumina host
Lv et al. Preparation of calcium carbonate by calcium carbide residue
RU2360865C1 (en) Processing method of bauxites on alumina

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant