CN111732361B - Production method for using multisource industrial by-product gypsum as cement retarder - Google Patents
Production method for using multisource industrial by-product gypsum as cement retarder Download PDFInfo
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- CN111732361B CN111732361B CN202010334014.2A CN202010334014A CN111732361B CN 111732361 B CN111732361 B CN 111732361B CN 202010334014 A CN202010334014 A CN 202010334014A CN 111732361 B CN111732361 B CN 111732361B
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- gypsum
- phosphogypsum
- mirabilite
- power plant
- industrial
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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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/14—Acids or salts thereof containing sulfur in the anion, e.g. sulfides
- C04B22/142—Sulfates
- C04B22/143—Calcium-sulfate
- C04B22/144—Phosphogypsum
-
- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/14—Acids or salts thereof containing sulfur in the anion, e.g. sulfides
- C04B22/142—Sulfates
- C04B22/143—Calcium-sulfate
- C04B22/145—Gypsum from the desulfuration of flue gases
-
- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/14—Acids or salts thereof containing sulfur in the anion, e.g. sulfides
- C04B22/142—Sulfates
- C04B22/143—Calcium-sulfate
- C04B22/146—Calcium-sulfate other waste Ca-sulfate
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/20—Retarders
- C04B2103/22—Set retarders
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a production method for using multisource industrial byproduct gypsum as a cement retarder, belonging to the technical field of production methods of cement retarders.A mixture of filtered phosphogypsum, power plant desulfurized gypsum, mirabilite gypsum and steel plant desulfurized gypsum is further pressed in a pressing machine to filter water; drying the mixture of the phosphogypsum, the power plant desulfurization gypsum, the mirabilite gypsum and the steel plant desulfurization gypsum by a dryer; the dried phosphogypsum, the power plant desulfurization gypsum, the mirabilite gypsum and the steel plant desulfurization gypsum mixture are kneaded and compacted by a kneading machine; the kneaded mixture of the phosphogypsum, the power plant desulfurized gypsum, the mirabilite gypsum and the steel plant desulfurized gypsum is granulated by a granulator, and the phosphogypsum, the power plant desulfurized gypsum, the mirabilite gypsum and the steel plant desulfurized gypsum are mixed to be used as raw materials of the cement retarder, so that the dependence of cement production on the natural gypsum retarder can be broken, and a beneficial reference is provided for large-scale resource utilization of gypsum in industrial and secondary plants.
Description
Technical Field
The invention relates to a production method of a cement retarder, in particular to a production method of using multisource industrial by-product gypsum as the cement retarder, belonging to the technical field of production methods of cement retarders.
Background
The cement retarder is an additive which can delay cement hydration reaction, thereby prolonging the setting time of concrete, keeping the plasticity of fresh concrete for a long time, facilitating the pouring, improving the construction efficiency and simultaneously not causing adverse effect on various performances of the later stage of the concrete.
The retarder is of various types, and the commonly used retarder mainly comprises lignosulfonate and derivatives thereof, low molecular weight cellulose and derivatives thereof, hydroxycarboxylic acid (salt), organic phosphonic acid (salt), boric acid (salt), a compound and the like. The retarder is continuously improved at home and abroad aiming at the defects of the original retarder, and a plurality of retarders are newly developed.
Substances which can be used in particular as retarders are dextrins, starches of various types, casein and certain protein-containing substances; also sucrose, glucose, calcium or sodium lignosulfonate, sodium carboxymethylcellulose (CMC), carboxyethylcellulose (CHC), and mixtures thereof; further, tartaric acid, potassium tartrate, calcium sulfate dihydrate, calcium sulfite, ferrous sulfate, boric acid, a mixture of boric acid and tartaric acid, a mixture of tartaric acid and sodium hydrogen carbonate, sodium hexametaphosphate, phosphoric acid, disodium phosphate, trisodium phosphate, tetrasodium phosphate, disodium hydrogen phosphate, sodium pyrophosphate, alkylphosphates, disodium ethylenediaminetetraacetate, various humic acids, and the like can be mentioned.
The cement retarder in the prior art needs to be matched with natural gypsum, the natural gypsum is expensive and limited in quantity, the natural gypsum is replaced by industrial by-product gypsum generated in various production industries, which is a necessary trend for the development of the cement industry, and in order to effectively solve the problems of low doping rate of the industrial by-product gypsum, shortage of the natural gypsum, high cost and the like in the cement production, a production method for using the multisource industrial by-product gypsum as the cement retarder is designed to optimize the problems.
Disclosure of Invention
The invention mainly aims to provide a production method for using multisource industrial by-product gypsum as a cement retarder, quantitatively weighing phosphogypsum, power plant desulfurized gypsum, mirabilite gypsum and steel plant desulfurized gypsum; putting the quantitatively weighed phosphogypsum, the power plant desulfurized gypsum, the mirabilite gypsum and the steel plant desulfurized gypsum into a crusher for crushing and mixing treatment; putting the crushed and mixed phosphogypsum, the power plant desulfurized gypsum, the mirabilite gypsum and the steel plant desulfurized gypsum into a constant-temperature stirring mixer, adding soft water, and stirring; putting the stirred phosphogypsum, the power plant desulfurized gypsum, the mirabilite gypsum and the steel plant desulfurized gypsum wet mixture into a filter to filter water; further pressing the filtered mixture of the phosphogypsum, the power plant desulfurized gypsum, the mirabilite gypsum and the steel plant desulfurized gypsum in a press to filter water; drying the mixture of the phosphogypsum, the power plant desulfurization gypsum, the mirabilite gypsum and the steel plant desulfurization gypsum by a dryer; the dried phosphogypsum, the power plant desulfurization gypsum, the mirabilite gypsum and the steel plant desulfurization gypsum mixture are kneaded and compacted by a kneading machine; the kneaded mixture of the phosphogypsum, the power plant desulfurized gypsum, the mirabilite gypsum and the steel plant desulfurized gypsum is granulated by a granulator, and the phosphogypsum, the power plant desulfurized gypsum, the mirabilite gypsum and the steel plant desulfurized gypsum are mixed to be used as raw materials of the cement retarder, so that the dependence of cement production on the natural gypsum retarder can be broken, and a beneficial reference is provided for large-scale resource utilization of gypsum in industrial and secondary plants.
The purpose of the invention can be achieved by adopting the following technical scheme:
a production method for using multisource industrial by-product gypsum as a cement retarder comprises the following steps:
step 1: quantitatively weighing phosphogypsum, power plant desulfurized gypsum, mirabilite gypsum and steel plant desulfurized gypsum;
step 2: putting the quantitatively weighed phosphogypsum, the power plant desulfurized gypsum, the mirabilite gypsum and the steel plant desulfurized gypsum into a crusher for crushing and mixing treatment;
and step 3: putting the crushed and mixed phosphogypsum, the power plant desulfurized gypsum, the mirabilite gypsum and the steel plant desulfurized gypsum into a constant-temperature stirring mixer, adding soft water, and stirring;
and 4, step 4: putting the stirred phosphogypsum, the power plant desulfurized gypsum, the mirabilite gypsum and the steel plant desulfurized gypsum wet mixture into a filter to filter water;
and 5: further pressing the filtered mixture of the phosphogypsum, the power plant desulfurized gypsum, the mirabilite gypsum and the steel plant desulfurized gypsum in a press to filter water;
step 6: drying the mixture of the phosphogypsum, the power plant desulfurization gypsum, the mirabilite gypsum and the steel plant desulfurization gypsum by a dryer;
and 7: the dried phosphogypsum, the power plant desulfurization gypsum, the mirabilite gypsum and the steel plant desulfurization gypsum mixture are kneaded and compacted by a kneading machine;
and 8: and granulating the mixture of the kneaded phosphogypsum, the power plant desulfurization gypsum, the mirabilite gypsum and the steel plant desulfurization gypsum through a granulator.
Preferably, the phosphogypsum, the power plant desulfurization gypsum, the mirabilite gypsum and the steel plant desulfurization gypsum are weighed and mixed according to the ratio of 1:1:1: 1.
Preferably, the temperature of the constant-temperature stirring mixer in the step 3 is set to be 40-60 ℃.
Preferably, the step 6 dryer is heated and dried at the temperature of 200-260 ℃.
Preferably, the dryer adopts an electric heating dryer and adopts wind power for drying.
Preferably, the granulator is a twin screw granulator.
Preferably, the heating mode of the dryer adopts a high-temperature electric heating wire for heating.
Preferably, the pressing machine in the step 5 is an impact pressing machine.
The invention has the beneficial technical effects that:
the invention provides a production method for using multisource industrial by-product gypsum as a cement retarder, quantitatively weighing phosphogypsum, power plant desulfurized gypsum, mirabilite gypsum and steel plant desulfurized gypsum; putting the quantitatively weighed phosphogypsum, the power plant desulfurized gypsum, the mirabilite gypsum and the steel plant desulfurized gypsum into a crusher for crushing and mixing treatment; putting the crushed and mixed phosphogypsum, the power plant desulfurized gypsum, the mirabilite gypsum and the steel plant desulfurized gypsum into a constant-temperature stirring mixer, adding soft water, and stirring; putting the stirred phosphogypsum, the power plant desulfurized gypsum, the mirabilite gypsum and the steel plant desulfurized gypsum wet mixture into a filter to filter water; further pressing the filtered mixture of the phosphogypsum, the power plant desulfurized gypsum, the mirabilite gypsum and the steel plant desulfurized gypsum in a press to filter water; drying the mixture of the phosphogypsum, the power plant desulfurization gypsum, the mirabilite gypsum and the steel plant desulfurization gypsum by a dryer; the dried phosphogypsum, the power plant desulfurization gypsum, the mirabilite gypsum and the steel plant desulfurization gypsum mixture are kneaded and compacted by a kneading machine; the kneaded mixture of the phosphogypsum, the power plant desulfurized gypsum, the mirabilite gypsum and the steel plant desulfurized gypsum is granulated by a granulator, and the phosphogypsum, the power plant desulfurized gypsum, the mirabilite gypsum and the steel plant desulfurized gypsum are mixed to be used as raw materials of the cement retarder, so that the dependence of cement production on the natural gypsum retarder can be broken, and a beneficial reference is provided for large-scale resource utilization of gypsum in industrial and secondary plants.
Detailed Description
In order to make the technical solutions of the present invention more clear and definite for those skilled in the art, the present invention is further described in detail with reference to the following examples, but the embodiments of the present invention are not limited thereto.
The production method for using multisource industrial by-product gypsum as the cement retarder provided by the embodiment comprises the following steps:
step 1: quantitatively weighing phosphogypsum, power plant desulfurized gypsum, mirabilite gypsum and steel plant desulfurized gypsum;
step 2: putting the quantitatively weighed phosphogypsum, the power plant desulfurized gypsum, the mirabilite gypsum and the steel plant desulfurized gypsum into a crusher for crushing and mixing treatment;
and step 3: putting the crushed and mixed phosphogypsum, the power plant desulfurized gypsum, the mirabilite gypsum and the steel plant desulfurized gypsum into a constant-temperature stirring mixer, adding soft water, and stirring;
and 4, step 4: putting the stirred phosphogypsum, the power plant desulfurized gypsum, the mirabilite gypsum and the steel plant desulfurized gypsum wet mixture into a filter to filter water;
and 5: further pressing the filtered mixture of the phosphogypsum, the power plant desulfurized gypsum, the mirabilite gypsum and the steel plant desulfurized gypsum in a press to filter water;
step 6: drying the mixture of the phosphogypsum, the power plant desulfurization gypsum, the mirabilite gypsum and the steel plant desulfurization gypsum by a dryer;
and 7: the dried phosphogypsum, the power plant desulfurization gypsum, the mirabilite gypsum and the steel plant desulfurization gypsum mixture are kneaded and compacted by a kneading machine;
and 8: and granulating the mixture of the kneaded phosphogypsum, the power plant desulfurization gypsum, the mirabilite gypsum and the steel plant desulfurization gypsum through a granulator.
In this example, the phosphogypsum, the power plant desulfurized gypsum, the mirabilite gypsum and the steel plant desulfurized gypsum are weighed and mixed according to the ratio of 1:1:1: 1.
In this example, the thermostatic mixing mixer of step 3 was set to a temperature of 40-60 ℃.
In the embodiment, the step 6 dryer performs heating and drying at the temperature of 200-260 ℃.
In this embodiment, the dryer is an electrically heated dryer and is a wind dryer.
In this embodiment, the pelletizer is a twin screw pelletizer.
In this embodiment, the dryer is heated by a high-temperature electric heating wire.
In this embodiment, the press in step 5 is an impact press.
The above description is only for the purpose of illustrating the present invention and is not intended to limit the scope of the present invention, and any person skilled in the art can substitute or change the technical solution of the present invention and its conception within the scope of the present invention.
Claims (8)
1. A production method for using multisource industrial by-product gypsum as a cement retarder is characterized in that: the method comprises the following steps:
step 1: quantitatively weighing phosphogypsum, power plant desulfurized gypsum, mirabilite gypsum and steel plant desulfurized gypsum;
step 2: putting the quantitatively weighed phosphogypsum, the power plant desulfurized gypsum, the mirabilite gypsum and the steel plant desulfurized gypsum into a crusher for crushing and mixing treatment;
and step 3: putting the crushed and mixed phosphogypsum, the power plant desulfurized gypsum, the mirabilite gypsum and the steel plant desulfurized gypsum into a constant-temperature stirring mixer, adding soft water, and stirring;
and 4, step 4: putting the stirred phosphogypsum, the power plant desulfurized gypsum, the mirabilite gypsum and the steel plant desulfurized gypsum wet mixture into a filter to filter water;
and 5: further pressing the filtered mixture of the phosphogypsum, the power plant desulfurized gypsum, the mirabilite gypsum and the steel plant desulfurized gypsum in a press to filter water;
step 6: drying the mixture of the phosphogypsum, the power plant desulfurization gypsum, the mirabilite gypsum and the steel plant desulfurization gypsum by a dryer;
and 7: the dried phosphogypsum, the power plant desulfurization gypsum, the mirabilite gypsum and the steel plant desulfurization gypsum mixture are kneaded and compacted by a kneading machine;
and 8: and granulating the mixture of the kneaded phosphogypsum, the power plant desulfurization gypsum, the mirabilite gypsum and the steel plant desulfurization gypsum through a granulator.
2. The production method of claim 1, which utilizes multisource industrial by-product gypsum as cement retarder, characterized in that: the phosphogypsum, the power plant desulfurized gypsum, the mirabilite gypsum and the steel plant desulfurized gypsum are weighed and mixed according to the ratio of 1:1:1: 1.
3. The production method of claim 1, which utilizes multisource industrial by-product gypsum as cement retarder, characterized in that: wherein the temperature of the constant-temperature stirring mixer in the step 3 is set to be 40-60 ℃.
4. The production method of claim 1, which utilizes multisource industrial by-product gypsum as cement retarder, characterized in that: wherein the step 6 drying machine is used for heating and drying at the temperature of 200-260 ℃.
5. The production method of claim 4, which utilizes multisource industrial by-product gypsum as cement retarder, characterized in that: the dryer adopts an electric heating dryer and dries by wind power.
6. The production method of claim 1, which utilizes multisource industrial by-product gypsum as cement retarder, characterized in that: the granulator adopts a double-helix granulator.
7. The production method of claim 4, which utilizes multisource industrial by-product gypsum as cement retarder, characterized in that: the heating mode of the dryer adopts a high-temperature electric heating wire for heating.
8. The production method of claim 1, which utilizes multisource industrial by-product gypsum as cement retarder, characterized in that: the pressing machine in the step 5 adopts an impact pressing machine.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010334014.2A CN111732361B (en) | 2020-04-24 | 2020-04-24 | Production method for using multisource industrial by-product gypsum as cement retarder |
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| CN202010334014.2A CN111732361B (en) | 2020-04-24 | 2020-04-24 | Production method for using multisource industrial by-product gypsum as cement retarder |
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| CN111732361A CN111732361A (en) | 2020-10-02 |
| CN111732361B true CN111732361B (en) | 2022-01-25 |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US7293941B2 (en) * | 2005-08-05 | 2007-11-13 | Halliburton Energy Services, Inc. | Methods for cementing using compositions containing salts |
| CN1958505A (en) * | 2006-11-29 | 2007-05-09 | 北京朗新明环保科技有限公司 | Retarding agent of cement, and forming method |
| CN101792278B (en) * | 2010-04-06 | 2013-01-23 | 四川利森建材科技开发有限公司 | Method for producing cement retarder through phosphogypsum |
| CN101830655B (en) * | 2010-06-09 | 2012-03-21 | 山东天力干燥股份有限公司 | Energy-saving gypsum calcination system and process |
| CN108996937A (en) * | 2018-07-09 | 2018-12-14 | 铜陵菻科工业石膏综合利用有限责任公司 | A method of cement retarder is prepared with industry by-product gypsum |
| CN110204237B (en) * | 2019-06-28 | 2022-04-05 | 贵州川恒化工股份有限公司 | Production method of cement retarder |
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