CN115340390B - Preparation method of red mud-based baking-free high-strength clay brick alkali inhibitor - Google Patents
Preparation method of red mud-based baking-free high-strength clay brick alkali inhibitor Download PDFInfo
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- CN115340390B CN115340390B CN202210826729.9A CN202210826729A CN115340390B CN 115340390 B CN115340390 B CN 115340390B CN 202210826729 A CN202210826729 A CN 202210826729A CN 115340390 B CN115340390 B CN 115340390B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/06—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals
- C08F283/065—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals on to unsaturated polyethers, polyoxymethylenes or polyacetals
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
- C04B35/634—Polymers
- C04B35/63448—Polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B35/63488—Polyethers, e.g. alkylphenol polyglycolether, polyethylene glycol [PEG], polyethylene oxide [PEO]
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- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Treatment Of Sludge (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention discloses a preparation method of a red mud-based baking-free high-strength clay brick alkali inhibitor, which comprises the following steps: 1. adding stearic acid, alkali metal hydroxide and alkali metal carbonate into water at 60-80 deg.c and stirring to obtain solution A; 2. adding acrylic acid, sodium allylsulfonate, acrylamide and a chain transfer agent into water, and uniformly stirring to obtain a solution B; 3. adding acrylic acid, polyether macromonomer and initiator into water, and stirring until the acrylic acid, polyether macromonomer and initiator are completely dissolved to obtain a solution C; 4. heating the solution C to 60-80 ℃ under stirring, simultaneously dropwise adding the solution A and the solution B into the solution C, finishing the dropwise adding of the solution A for three hours and finishing the dropwise adding of the solution B for three and a half hours, then preserving heat for one hour, and cooling to obtain the red mud-based baking-free high-strength clay brick alkali inhibitor.
Description
Technical Field
The invention relates to the technical field of building materials and assistants, in particular to a preparation method of a red mud-based baking-free high-strength clay brick alkali inhibitor.
Background
Red mud is a strong alkaline waste generated in the production process of alumina, and according to the different processing technology and raw materials, 0.8-2.5 t red mud is generated every time 1 t alumina is produced. The red mud has high yield and strong alkalinity, and is difficult to comprehensively utilize. The building material produced by the red mud has a large amount of alkali precipitation in the use process, and is commonly called alkali return phenomenon. For the large-scale use of red mud, the current method mainly reduces the alkali content in the red mud, namely, the red mud is treated by a dealkalization method. The method for dealkalizing the red mud has a plurality of main water washing methods, lime methods, salt leaching methods, membrane dealkalization technologies and the like, but because the red mud has complex components and various existence forms of alkali, the dealkalization process is complex, the investment is high and secondary pollution is easy to cause, so the problems of economy, periodicity, secondary pollution and the like of dealkalization of the red mud prevent the large-scale application of the dealkalization method of the red mud, the dealkalization problem of the red mud is still the current research problem, and the problems of alkali return and alkali precipitation of the red mud-based building material cannot be fundamentally solved.
The problems of alkali return and alkali precipitation also exist after the red mud-based baking-free high-strength clay brick is formed. In order to solve the problem, the invention provides a preparation method of an alkali inhibitor, which is used for inhibiting alkali precipitation in the preparation process of the red mud-based baking-free high-strength clay brick.
Disclosure of Invention
In order to solve the problems, the invention provides a preparation method of the red mud-based baking-free high-strength clay brick alkali inhibitor, which can obviously inhibit precipitation of alkali in red mud and also solves the problem of alkali return of the red mud-based baking-free high-strength clay.
The invention is realized by the following technical scheme:
the preparation method of the red mud-based baking-free high-strength clay brick alkali inhibitor mainly comprises the following steps:
step one, preparing a solution A: adding stearic acid, alkali metal hydroxide and alkali metal carbonate into water at 60-80 deg.c and stirring to obtain solution A;
step two, preparing a solution B: adding acrylic acid, sodium allylsulfonate, acrylamide and a chain transfer agent into water, and uniformly stirring to obtain a solution B;
step three, preparing a solution C: adding acrylic acid, polyether macromonomer and initiator into water, and stirring until the acrylic acid, polyether macromonomer and initiator are completely dissolved to obtain a solution C;
step four, preparing an alkali inhibitor: heating the solution C to 60-80 ℃ under stirring, simultaneously dropwise adding the solution A and the solution B into the solution C, after three hours of dropwise adding the solution A, three half hours of dropwise adding the solution B, then preserving heat for one hour, and cooling to obtain the red mud-based baking-free high-strength clay brick alkali inhibitor.
Further, the amount of stearic acid in the solution A is 5-8 g, the amount of alkali metal hydroxide is 0.5-1 g, and the amount of alkali metal carbonate is 0.2-0.5 g.
Further, the amount of acrylic acid in the solution B is 5-10, the amount of acrylamide is 0-5 g, and the amount of sodium allylsulfonate is 1-3 g.
Further, the amount of acrylic acid in the solution C is 10-20 g, the amount of polyether macromonomer is 25-40 g, and the amount of initiator is 0.2-1 g.
Further, the initiator is one or two of ammonium persulfate, hydrogen peroxide and potassium persulfate.
Further, the polyether macromonomer is one of allyl polyoxyethylene ether, isopentenyl alcohol polyoxyethylene ether and vinyl polyether macromonomer.
Further, the chain transfer agent is mercaptopropionic acid.
The invention has the beneficial effects that:
1. the preparation method is simple to use, avoids a complex dealkalization process, and can effectively prevent and treat the problem of alkali return by directly adding the prepared alkali inhibitor when producing the red mud-based baking-free high-strength clay brick;
2. the use of the alkali inhibitor can realize the full resource utilization of the red mud;
3. the alkali inhibitor prepared by the method can obviously inhibit the precipitation of alkali in the red mud, and simultaneously solves the problem of alkali return of the red mud-based baking-free high-strength clay;
4. the alkali inhibitor prepared by the invention blocks a mass transfer channel of soluble alkali in red mud in use, can be added according to a certain proportion when the red mud-based baking-free high-strength clay brick is produced, can completely solve the problem of alkali return of products, and can obviously inhibit the precipitation of the soluble alkali in the red mud by testing the PH value of the clay brick soaking water solution.
Detailed Description
The following description of the technical solution in the embodiments of the present invention is clear and complete.
Example 1:
the preparation method of the red mud-based baking-free high-strength clay brick alkali inhibitor mainly comprises the following steps:
preparing a solution A: the dosage of stearic acid is 5 g, the dosage of alkali metal hydroxide is 0.5 g, the dosage of alkali metal carbonate is 0.3 g, and the mixture is added into water and heated to 70 ℃ for standby;
preparing a solution B: the dosage of the acrylic acid is 5 g, the dosage of the acrylamide is 1 g, and the dosage of the sodium allylsulfonate is 1.5 g, and the water is added for standby;
preparing a solution C: the amount of acrylic acid is 10 g, the amount of polyether macromonomer is 25 g, and the amount of initiator is 0.35 g, and the mixture is added into certain water.
Preparing an alkali inhibitor: heating the solution C to 60-80 ℃ under the stirring state, simultaneously dropwise adding the solution A and the solution B into the solution C, finishing the dropwise adding of the solution A for three hours, finishing the dropwise adding of the solution B for three and half hours, then preserving heat for one hour, and cooling to obtain the red mud-based baking-free high-strength clay brick alkali inhibitor.
Example 2
The preparation method of the red mud-based baking-free high-strength clay brick alkali inhibitor mainly comprises the following steps:
preparing a solution A: adding 8 g of stearic acid, 0.8 g of alkali metal hydroxide and 0.5 g of alkali metal carbonate into water and heating to 70 ℃ for standby;
preparing a solution B: the dosage of the acrylic acid is 10 g, the dosage of the acrylamide is 3 g, and the dosage of the sodium allylsulfonate is 2.5 g, and the water is added for standby;
preparing a solution C: the amount of acrylic acid is 15 g, the amount of polyether macromonomer is 40 g, and the amount of initiator is 0.5 g, and the mixture is added into certain water for standby;
preparing an alkali inhibitor: heating the solution C to 60-80 ℃ under the stirring state, simultaneously dropwise adding the solution A and the solution B into the solution C, finishing the dropwise adding of the solution A for three hours, finishing the dropwise adding of the solution B for three and half hours, then preserving heat for one hour, and cooling to obtain the red mud-based baking-free high-strength clay brick alkali inhibitor.
The initiator used in the above embodiment is one or two of ammonium persulfate, hydrogen peroxide and potassium persulfate, the polyether macromonomer is one of allyl polyoxyethylene ether, isopentenyl alcohol polyoxyethylene ether and vinyl polyether macromonomer, and the chain transfer agent is mercaptopropionic acid.
The red mud-based baking-free high-strength clay brick alkali inhibitor prepared by the embodiment has the following use effects in preparing clay bricks:
as can be seen from the table, the pH value of the soaking aqueous solution of the clay brick prepared by the alkali inhibitor is obviously reduced, and the precipitation of soluble alkali in the red mud is effectively inhibited.
While the basic principles, principal features and advantages of the present invention have been shown and described, it will be understood by those skilled in the art that the present invention is not limited by the foregoing embodiments, which are described in the foregoing description merely illustrate the principles of the invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents.
Claims (6)
1. A preparation method of a red mud-based baking-free high-strength clay brick alkali inhibitor is characterized by comprising the following steps: the method comprises the following steps:
step one, preparing a solution A: adding stearic acid, alkali metal hydroxide and alkali metal carbonate into water at 60-80 deg.c and stirring to obtain solution A;
step two, preparing a solution B: adding acrylic acid, sodium allylsulfonate, acrylamide and a chain transfer agent into water, and uniformly stirring to obtain a solution B;
step three, preparing a solution C: adding acrylic acid, polyether macromonomer and an initiator into water, and stirring until the acrylic acid, the polyether macromonomer and the initiator are completely dissolved to obtain a solution C, wherein the initiator is one or two of ammonium persulfate, hydrogen peroxide and potassium persulfate;
step four, preparing an alkali inhibitor: heating the solution C to 60-80 ℃ under stirring, simultaneously dropwise adding the solution A and the solution B into the solution C, after three hours of dropwise adding the solution A, three half hours of dropwise adding the solution B, then preserving heat for one hour, and cooling to obtain the red mud-based baking-free high-strength clay brick alkali inhibitor.
2. The preparation method of the red mud-based baking-free high-strength clay brick alkali inhibitor is characterized by comprising the following steps: the dosage of stearic acid in the solution A is 5-8 g, the dosage of alkali metal hydroxide is 0.5-1 g, and the dosage of alkali metal carbonate is 0.2-0.5 g.
3. The preparation method of the red mud-based baking-free high-strength clay brick alkali inhibitor is characterized by comprising the following steps: the dosage of the acrylic acid in the solution B is 5-10 g, the dosage of the acrylamide is 0-5 g, and the dosage of the sodium allylsulfonate is 1-3 g.
4. The preparation method of the red mud-based baking-free high-strength clay brick alkali inhibitor is characterized by comprising the following steps: the amount of acrylic acid in the solution C is 10-20 g, the amount of polyether macromonomer is 25-40 g, and the amount of initiator is 0.2-1 g.
5. The preparation method of the red mud-based baking-free high-strength clay brick alkali inhibitor according to claim 1 or 4, which is characterized by comprising the following steps: the polyether macromonomer is one of allyl polyoxyethylene ether, isopentenyl alcohol polyoxyethylene ether and vinyl polyether macromonomer.
6. The preparation method of the red mud-based baking-free high-strength clay brick alkali inhibitor is characterized by comprising the following steps: the chain transfer agent is mercaptopropionic acid.
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