CN115403293B - Method for preparing concrete thickener from wet-milled potassium feldspar tailings and applying concrete thickener - Google Patents
Method for preparing concrete thickener from wet-milled potassium feldspar tailings and applying concrete thickener Download PDFInfo
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- CN115403293B CN115403293B CN202210602622.6A CN202210602622A CN115403293B CN 115403293 B CN115403293 B CN 115403293B CN 202210602622 A CN202210602622 A CN 202210602622A CN 115403293 B CN115403293 B CN 115403293B
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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
- C04B28/04—Portland cements
-
- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
- C04B40/0046—Premixtures of ingredients characterised by their processing, e.g. sequence of mixing the ingredients when preparing the premixtures
-
- 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
- C04B2103/44—Thickening, gelling or viscosity increasing agents
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- 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
Abstract
The invention provides a method for preparing a concrete thickener from wet-milled potassium feldspar tailings and applying the concrete thickener to the wet-milled potassium feldspar tailings, which comprises the following steps of: step 1, soaking potassium feldspar tailings, placing the soaked potassium feldspar tailings and wet grinding balls into a wet grinding tank after configuration, adding sodium gluconate, starting equipment for stirring, and finally adding bauxite tailings and lime into the slurry after uniform stirring; step 2, injecting constant-temperature hot oil into an oil heat pipe in the wet grinding tank; and step 3, carrying out wet grinding to obtain slurry with the particle size of less than 5 mu m, namely, wet grinding the potassium feldspar tailings to obtain the concrete thickener. The thickener obtained in the step 3 is doped into the concrete preparation raw material in the application process. The raw materials adopted by the invention are industrial solid wastes, so that the preparation process is simplified, and the environmental pollution and the cost are reduced.
Description
Technical Field
The invention belongs to the field of building materials, and particularly relates to a method for preparing a concrete thickener from wet-milled potassium feldspar tailings and applying the concrete thickener.
Background
The construction of bridges, tunnels and tall buildings is not assisted by civil engineering materials. The problems of great supply of more and more projects and large scale to the building material industry are solved, a plurality of poor products are provided for the sand aggregates with uneven layers and illegal merchants, great problems are provided for the concrete industry, new power is provided for the innovative development of the additive, and various additives are provided for more and more additive manufacturers to solve the problem of poor concrete workability.
In order to solve the problems of segregation and bleeding of concrete, a thickening agent for increasing the adhesion between aggregate and cementing material in the concrete is added in a commercial mixing station, and two types of water-soluble resins are commonly used as concrete thickening agents, and the second type is polymer electrolyte. The viscosity of the added thickening agent is increased, so that the problems of segregation and bleeding are solved to a certain extent, but if the mixing amount is too large, the viscosity is too large, the deformation of cement paste is limited, the shear strength is improved, and the rheological property is reduced, so that the flow of a mixture is not facilitated.
Tailings are solid waste in the production process of mining industry, and have the characteristics of large quantity of tailings, similar abundance, different properties and the like in China. The main mineral components of the potassium feldspar tailings are quartz, kaolin, feldspar and the like, and the main chemical components are in the form of oxides of iron, silicon, aluminum, magnesium and the like. In terms of the existing tailing treatment mode, a stacking mode is adopted, so that not only is a large amount of land occupied, and is the waste of land resources, but also the problems of pollution to the atmosphere, soil and water bodies and the like are generated, and in addition, the dam break of a tailing pond can also cause important loss of lives and properties of people. Therefore, the realization of changing waste potassium feldspar tailings into valuable is an important way for realizing sustainable development of mineral resources.
Patent application publication No. CN108239221A discloses a concrete thickener and a preparation method thereof. The thickener comprises the following components: 0.05 to 0.8 percent of aqueous solution thickening component, 0.5 to 1.5 percent of acrylamide, 1 to 5 percent of acrylic acid, 0.3 to 1 percent of 2-acrylamide-2-methylpropanesulfonic acid, 0.05 to 0.5 percent of initiator, 0.03 to 0.3 percent of reducing agent, 0.6 to 3 percent of neutralizer and the balance of water; the preparation method comprises the following steps: (1) Mixing 10-30% of water with an aqueous solution thickening component, acrylamide, acrylic acid, 2-acrylamide-2-methylpropanesulfonic acid and an initiator according to a proportion, and controlling the temperature to be 10-30 ℃; (2) Dripping an aqueous solution prepared by a reducing agent and 20-40% of water for 1-2 h; (3) And (3) carrying out heat preservation reaction, adding a neutralizing agent and the rest water, and mixing to obtain the water-based paint. The concrete thickener has the advantages of easily available raw materials, low cost, simple and feasible process, low preparation reaction temperature and good adaptability, but more components and more complex preparation.
The patent application with publication number of CN113336464A discloses a concrete thickener and a preparation method thereof, wherein the concrete thickener is prepared from the following raw materials in parts by weight: nano silicon dioxide powder: 60-100 parts; a coherent mass: 40-70 parts; and (2) a binder: 0.3-1 part; 0.5-1 part of oxidant; 0.3-0.5 part of stabilizer; 0.5-1 part of chain transfer agent and 100-150 parts of water; the preparation method comprises the following steps: mixing nano silicon dioxide powder and a sticky polymer according to the parts by weight to obtain a mixture; adding a binder, an oxidant, a stabilizer and a chain transfer agent into water according to parts by weight, and mixing to obtain a mixed solution; adding the obtained mixed solution into the mixture, and fully mixing to obtain a thickener; the thickener has little influence on the water reducing performance of concrete, can greatly improve the performance of concrete slurry, reduce the bleeding of concrete, improve the workability of concrete and has positive effects on the strength of concrete. However, the invention also has the problems of excessive materials, complex manufacture and the like.
The patent application with publication number of CN104231152B discloses a preparation method of a concrete thickener, which comprises the following steps: and (3) carrying out water-phase free radical polymerization reaction on the unsaturated amide small monomers, the unsaturated hydroxy ester small monomers and the unsaturated sulfonic acid small monomers under the combined action of an oxidation-reduction system consisting of an initiator and a reducing agent to obtain a copolymerization product, adjusting the pH value to 6-7 after the reaction is finished, and adding water to obtain the concrete thickener with the concentration of 3-10wt%. The method adjusts the product performance by controlling the molecular weight of the copolymerization product, has rapid reaction and high efficiency, does not use organic solvent, is nontoxic and pollution-free, and is simple to operate. The concrete thickener prepared by the method is anti-segregation under the premise of high water retention, so that the slump retention of the concrete is ensured, the product performance is stable, but the problems of complex preparation, high cost and the like exist.
Therefore, aiming at the problems of complex manufacture and higher cost of the concrete thickener in the prior art, the invention aims to provide a preparation method of the concrete thickener, which has simple manufacture and lower cost and can be widely applied to the field of building materials.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention adopts the following technical scheme for solving the problems existing in the prior art:
a method for preparing an ore concrete thickener by wet grinding potassium feldspar tails comprises the following steps:
step 1, soaking potassium feldspar tailings for 1d-5d according to a water-material ratio of 1.6-2.0, preparing soaked potassium feldspar tailings with wet grinding balls according to a ball-material ratio of 5-6, placing the prepared wet grinding balls and potassium feldspar tailings slurry into a wet grinding tank, adding sodium gluconate with a mass of 1-5 per mill of the potassium feldspar tailings, starting equipment to stir for 2-3min at a rotating speed of 150-200r/min, and finally adding bauxite tailings with a mass of 1-10% of the potassium feldspar tailings and lime with a mass of 1-5% of the bauxite tailings into the slurry after uniform stirring so as to facilitate intercalation between the potassium feldspar tailings layers;
step 2, injecting constant-temperature hot oil at 50-60 ℃ into an oil heat pipe in the wet grinding tank;
and step 3, carrying out wet grinding to obtain slurry with the particle size of less than 5 mu m, namely, wet grinding the potassium feldspar tailings to obtain the concrete thickener.
The application method of the concrete thickener comprises the following steps: and (3) adding the thickener obtained in the step (3) into the concrete preparation raw material, wherein the mass part of the added thickener is 1-10% of the mass of cement in the concrete.
The potassium feldspar tailings are industrial solid wastes generated in potassium feldspar ore dressing.
The equipment rotating speed in the wet grinding process in the step 3 is 500-1000r/min.
And in the step 3, high Wen Youliao is introduced into the oil heat pipe, and the oil temperature is 70-90 ℃.
The wet grinding balls are one or two of zirconia or agate balls.
The wet grinding tank is made of one of zirconia or stainless steel.
The invention has the following advantages:
the raw materials adopted by the invention are industrial solid wastes, wherein the potassium feldspar is taken as a main raw material, and the main purpose of the potassium feldspar and lime are to intercalate between layers of the potassium feldspar tailing particles, so that the water reducer is prevented from being adsorbed in the using process, the preparation of the concrete thickener is greatly simplified in the preparation process, and the environmental pollution and the cost are greatly reduced by utilizing the industrial solid wastes.
In addition, the superfine treatment of the potassium feldspar tailings is realized by a wet grinding technology, the particle size of potassium feldspar tailings particles is reduced, the specific surface area is increased, the self surface of the potassium feldspar tailings is negatively charged, and the potassium feldspar tailings have good physical adsorptivity and surface chemical activity, so that the viscosity of the potassium feldspar tailings is better. When applied to the field of building materials, the method has the advantages that: the wet-milled potassium feldspar tailings can be used as a thickening agent to increase the adhesion between the cementing material and the aggregate, so that the influence on the later strength of concrete is small, and in addition, the bauxite tailings are used for carrying out wet milling cooperatively, so that the influence on workability caused by free water adsorption or additive adsorption generated by clay in the potassium feldspar tailings is reduced.
Detailed Description
The technical scheme of the invention is further specifically described by the following examples.
The potassium feldspar tailings adopted in the embodiment are filter-pressing waste left in potassium feldspar ore dressing; the cement is ordinary Portland cement; the water is tap water; the water reducer is one of polycarboxylic acid high-performance water reducer with solid content of 40% and aliphatic high-efficiency water reducer with solid content of 40% HSB, and is sold in the market; the sand aggregate is commercially available; the fly ash is commercially available.
Comparative example 1:
the composite material consists of the following components in parts by weight:
the potassium feldspar tailings are soaked for 1d-5d according to the water-material ratio of 1.6-2.0, the ball-material ratio is 5-6, raw materials are prepared, and the prepared raw materials are placed into a wet grinding tank. Adding sodium gluconate with the mass of 1-5 per mill of potassium feldspar tailings, starting equipment to stir for 2-3min at the rotating speed of 150-200r/min, adding bauxite tailings with the mass of 1-10% of the potassium feldspar tailings and lime with the mass of 1-5% of the bauxite tailings into the uniformly stirred slurry, facilitating the dissolution of alumina, facilitating the insertion of the alumina between the potassium feldspar tailings, injecting constant-temperature hot oil with the temperature of 50-60 ℃ into an oil heat pipe in a wet grinding device, promoting ion dissolution, and finally performing wet grinding to obtain slurry with the thickness of less than 5 mu m, namely the thickener.
C30 concrete is prepared, and the preparation materials and the weight parts of the C30 concrete are as follows:
220 parts of common silica cement; 100 parts of fly ash; 30 parts of mineral powder; 800 parts of sand; 1100 parts of stone; 160 parts of water and 1.3 parts of high-efficiency water reducer.
And (3) filling the stirred materials into a mold, vibrating and forming, wherein various indexes are shown in the table one.
Example 1
The composite material consists of the following components in parts by weight:
the potassium feldspar tailings are soaked for 2d according to the water-material ratio of 1.8, the ball-material ratio is 5, raw materials are prepared, and the prepared raw materials are placed into a wet grinding tank. Adding sodium gluconate with the mass of 2 per mill of the potassium feldspar tailings, starting the equipment to stir for 3min, wherein the rotating speed of the equipment is 200r/min, adding 4 percent of the bauxite tailings with the mass of the potassium feldspar tailings and 2 percent of lime with the mass of the bauxite tailings into the uniformly stirred slurry, facilitating the dissolution of alumina, facilitating the insertion between the potassium feldspar tailings, injecting constant-temperature hot oil with the temperature of 50 ℃ into an oil heat pipe in a wet grinding device, promoting ion dissolution, and finally performing wet grinding to obtain slurry with the size of less than 5 mu m, namely the thickener.
C30 concrete is prepared, and the preparation materials and the weight parts of the C30 concrete are as follows:
220 parts of common silica cement; 100 parts of fly ash; 30 parts of mineral powder; 11 parts of thickener (solid content); 800 parts of sand; 1100 parts of stone; 160 parts of water and 1.3 parts of high-efficiency water reducer.
And (3) filling the stirred materials into a mold, vibrating and forming, wherein various indexes are shown in the table one.
Example 2:
the composite material consists of the following components in parts by weight:
the potassium feldspar tailings are soaked for 2d according to the water-material ratio of 1.8, the ball-material ratio is 5, raw materials are prepared, and the prepared raw materials are placed into a wet grinding tank. Adding sodium gluconate with the mass of 2 per mill of the potassium feldspar tailings, starting the equipment to stir for 3min, wherein the rotating speed of the equipment is 200r/min, adding 4 percent of the bauxite tailings with the mass of the potassium feldspar tailings and 2 percent of lime with the mass of the bauxite tailings into the uniformly stirred slurry, facilitating the dissolution of alumina, facilitating the insertion between the potassium feldspar tailings, injecting constant-temperature hot oil with the temperature of 50 ℃ into an oil heat pipe in a wet grinding device, promoting ion dissolution, and finally performing wet grinding to obtain slurry with the size of less than 5 mu m, namely the thickener.
C30 concrete is prepared, and the preparation materials and the weight parts of the C30 concrete are as follows:
220 parts of common silica cement; 100 parts of fly ash; 30 parts of mineral powder; 17.6 parts of thickener (solid content); 800 parts of sand; 1100 parts of stone; 160 parts of water and 1.3 parts of high-efficiency water reducer.
And (3) filling the stirred materials into a mold, vibrating and forming, wherein various indexes are shown in the table one.
Example 3:
the composite material consists of the following components in parts by weight:
the potassium feldspar tailings are soaked for 2d according to the water-material ratio of 1.8, the ball-material ratio is 5, raw materials are prepared, and the prepared raw materials are placed into a wet grinding tank. Adding sodium gluconate with the mass of 2 per mill of the potassium feldspar tailings, starting the equipment to stir for 3min, wherein the rotating speed of the equipment is 200r/min, adding 4 percent of the bauxite tailings with the mass of the potassium feldspar tailings and 2 percent of lime with the mass of the bauxite tailings into the uniformly stirred slurry, facilitating the dissolution of alumina, facilitating the insertion between the potassium feldspar tailings, injecting constant-temperature hot oil with the temperature of 50 ℃ into an oil heat pipe in a wet grinding device, promoting ion dissolution, and finally performing wet grinding to obtain slurry with the size of less than 5 mu m, namely the thickener.
C30 concrete is prepared, and the preparation materials and the weight parts of the C30 concrete are as follows:
220 parts of common silica cement; 100 parts of fly ash; 30 parts of mineral powder; 22 parts of thickener (solid content); 800 parts of sand; 1100 parts of stone; 160 parts of water and 1.3 parts of high-efficiency water reducer.
And (3) filling the stirred materials into a mold, vibrating and forming, wherein various indexes are shown in the table one.
TABLE one set of implementation case test indicators
From the data in the table, the thickening agent prepared by mixing the wet-milled potassium feldspar tailings obviously changes the fluidity of the concrete, the consistency is increased, but the fluidity of the low-mixing-amount potassium feldspar tailings-concrete system still meets the requirement of pumpability, and the time of collapse and falling degree can show that the thickening agent is mixed to obviously change the consistency of the concrete. In addition, from the aspect of mechanical properties, the mechanical properties of the thickener are not reduced by the incorporation of the thickener, and the reduction of the particle size of the potassium feldspar tailings after wet grinding plays a role in filling pores among hydration products of cement-based materials.
The protective scope of the invention is not limited to the embodiments described above, but it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope and spirit of the invention. It is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (7)
1. The method for preparing the concrete thickener by wet grinding the potassium feldspar tailings is characterized by comprising the following steps of:
step 1, soaking potassium feldspar tailings for 1d-5d according to a water-material ratio of 1.6-2.0, preparing soaked potassium feldspar tailings with wet grinding balls according to a ball-material ratio of 5-6, placing the prepared wet grinding balls and potassium feldspar tailings slurry into a wet grinding tank, adding sodium gluconate with a mass of 1-5 per mill of the potassium feldspar tailings, starting equipment to stir for 2-3min at a rotating speed of 150-200r/min, and finally adding bauxite tailings with a mass of 1-10% of the potassium feldspar tailings and lime with a mass of 1-5% of the bauxite tailings into the slurry after uniform stirring so as to facilitate intercalation between the potassium feldspar tailings layers;
step 2, injecting constant-temperature hot oil at 50-60 ℃ into an oil heat pipe in the wet grinding tank;
and step 3, carrying out wet grinding to obtain slurry with the particle size of less than 5 mu m, namely, wet grinding the potassium feldspar tailings to obtain the concrete thickener.
2. The method for preparing the concrete thickener by wet grinding potassium feldspar tailings according to claim 1, wherein the method comprises the following steps: the potassium feldspar tailings are industrial solid wastes generated in potassium feldspar ore dressing.
3. The method for preparing the concrete thickener by wet grinding potassium feldspar tailings according to claim 1, wherein the method comprises the following steps: the equipment rotating speed in the wet grinding process in the step 3 is 500-1000r/min.
4. The method for preparing the concrete thickener by wet grinding potassium feldspar tailings according to claim 1, wherein the method comprises the following steps: and in the step 3, high Wen Youliao is introduced into the oil heat pipe, and the oil temperature is 70-90 ℃.
5. The method for preparing the concrete thickener by wet grinding potassium feldspar tailings according to claim 1, wherein the method comprises the following steps: the wet grinding balls are one or two of zirconia or agate balls.
6. The method for preparing the concrete thickener by wet grinding potassium feldspar tailings according to claim 1, wherein the method comprises the following steps: the wet grinding tank is made of one of zirconia or stainless steel.
7. A concrete thickener prepared from wet-milled potassium feldspar tailings as claimed in any one of claims 1 to 6
The application method of (2) is characterized in that: the thickener obtained in the step 3 is mixed in the raw material for preparing the concrete,
the mass fraction of the doped thickener is 1-10% of the mass of the cement in the concrete.
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| US5164433A (en) * | 1991-04-17 | 1992-11-17 | Rheox, Inc. | Rheological agents and thickeners |
| JP2007320833A (en) * | 2006-06-05 | 2007-12-13 | Denki Kagaku Kogyo Kk | Extra-quick hardening cement composition, extra-quick hardening cement concrete composition, and extra-quick hardening cement concrete |
| JP5144849B2 (en) * | 2007-02-21 | 2013-02-13 | 電気化学工業株式会社 | Cement composition, hardened cement concrete, and method for producing hardened cement concrete |
| KR20080101373A (en) * | 2007-05-17 | 2008-11-21 | (주)포조피아 | Manufacture method of water soluble functional paint |
| JP6284432B2 (en) * | 2014-05-27 | 2018-02-28 | デンカ株式会社 | High flow lightweight mortar composition and high flow lightweight mortar using the same |
| CN106082924A (en) * | 2016-06-13 | 2016-11-09 | 马鞍山市金韩防水保温工程有限责任公司 | A kind of high-strength ageing thermal insulation mortar and preparation method thereof |
| EP3601188A4 (en) * | 2017-03-23 | 2021-01-20 | Solidia Technologies, Inc. | Carbonatable calcium silicate-based cements and concretes having mineral additives, and methods thereof |
| AU2017444344B2 (en) * | 2017-12-25 | 2024-01-04 | Dow Global Technologies Llc | Aqueous dispersion of multistage polymer |
| CN110526628B (en) * | 2018-05-23 | 2021-08-17 | 湖北工业大学 | Preparation method of high-doping-amount wet-grinding phosphorus-solid waste super-retarding cementing material |
| CN110642598B (en) * | 2019-10-30 | 2021-10-29 | 湖北工业大学 | Preparation method of ion selective adsorption ceramsite |
| CN112608042A (en) * | 2020-12-19 | 2021-04-06 | 湖北工业大学 | Method for preparing superfine copper tailing filling cementing material by wet grinding method of water-quenched copper slag |
| CN114105537B (en) * | 2021-11-29 | 2022-06-21 | 湖北工业大学 | Method for preparing copper tailing foam concrete by wet grinding foaming |
| CN114538874B (en) * | 2022-03-09 | 2023-03-28 | 湖北工业大学 | Method for preparing autoclaved aerated concrete block by utilizing copper tailing wet milling heating activation technology |
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