CN114516740B - Tungsten tailing non-fired light fine aggregate formula and preparation method thereof - Google Patents
Tungsten tailing non-fired light fine aggregate formula and preparation method thereof Download PDFInfo
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- CN114516740B CN114516740B CN202210051560.4A CN202210051560A CN114516740B CN 114516740 B CN114516740 B CN 114516740B CN 202210051560 A CN202210051560 A CN 202210051560A CN 114516740 B CN114516740 B CN 114516740B
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- 229910052721 tungsten Inorganic materials 0.000 title claims abstract description 74
- 239000010937 tungsten Substances 0.000 title claims abstract description 74
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 title claims abstract description 73
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 238000009472 formulation Methods 0.000 title claims description 7
- 239000000843 powder Substances 0.000 claims abstract description 55
- 239000000292 calcium oxide Substances 0.000 claims abstract description 50
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 50
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 238000002156 mixing Methods 0.000 claims abstract description 22
- 239000004568 cement Substances 0.000 claims abstract description 15
- 239000000203 mixture Substances 0.000 claims description 42
- 239000011398 Portland cement Substances 0.000 claims description 38
- 238000005469 granulation Methods 0.000 claims description 24
- 230000003179 granulation Effects 0.000 claims description 24
- 238000003756 stirring Methods 0.000 claims description 16
- 238000010025 steaming Methods 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 abstract description 21
- 239000002994 raw material Substances 0.000 abstract description 10
- 238000012216 screening Methods 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 5
- 238000005034 decoration Methods 0.000 abstract description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 4
- 239000000920 calcium hydroxide Substances 0.000 description 4
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000011265 semifinished product Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/14—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic in rotating dishes or pans
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
- C04B18/021—Agglomerated materials, e.g. artificial aggregates agglomerated by a mineral binder, e.g. cement
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/12—Waste materials; Refuse from quarries, mining or the like
-
- 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
- C04B22/06—Oxides, Hydroxides
- C04B22/062—Oxides, Hydroxides of the alkali or alkaline-earth metals
- C04B22/064—Oxides, Hydroxides of the alkali or alkaline-earth metals of the alkaline-earth metals
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Glanulating (AREA)
Abstract
The invention provides a tungsten tailing non-fired light fine aggregate formula and a preparation method thereof, belonging to the technical field of building decoration materials, wherein the formula comprises the following raw materials in parts by weight, cement accounts for 15-20% of total powder, tungsten tailing raw materials account for 75-80% of the total powder, and the mixing amount of calcium oxide is 1-9%; the ratio of water consumption to powder is 0.04-0.06. According to the invention, the tungsten tailings are molded only by using the simple binder-cement, the bulk density of the light fine aggregate is improved by using the expanding agent-calcium oxide, the manufactured light fine aggregate can meet the national standard GB/T17431.1-2010 particle grading without screening, and the bulk density of the manufactured light fine aggregate is 790kg/m after 28 days of maintenance 3 。
Description
Technical Field
The invention relates to the technical field of building decoration materials, in particular to a tungsten tailing non-fired light fine aggregate formula and a preparation method thereof.
Background
The tungsten ore grade in China is low, more than 95% of tailings can be generated in the ore dressing process, and the stock of the tailings in China at present reaches more than 1000 million tons. The existing countries increasingly limit the newly-built tailing ponds, but the quantity of newly-increased tailing residues is continuously increased, tungsten ore enterprises face the situation that no tailing storage areas exist in the future, and the problem of tailing disposal becomes the core problem of enterprise survival and development.
The prior technical scheme discloses that iron tailings are screened, particles with the particle size of below 150 mu m are taken as raw material fine powder, the raw material fine powder, a binder, a reinforcing agent and an additive are taken to be mixed and stirred to obtain a mixture, the mixture is taken to be granulated to obtain an aggregate semi-finished product, the aggregate semi-finished product is screened, the aggregate semi-finished product with the particle size of below 4.75mm is screened to be taken as fine aggregate, the aggregate semi-finished product with the particle size of above 4.75mm is taken as coarse aggregate, and the fine aggregate and the coarse aggregate are subjected to moisture preservation and maintenance at the temperature of 20-80 ℃ for 1-28 days to obtain the baking-free fine aggregate and the baking-free coarse aggregate.
The prior technical scheme does not mention the water consumption, and the water consumption has important influence on the compressive strength of the aggregate. And simultaneously, after granulation is finished, screening treatment is carried out: screening the semi-finished aggregate, and screening the semi-finished aggregate with the particle size of less than 4.75mm as fine aggregate and the semi-finished aggregate with the particle size of more than 4.75mm as coarse aggregate; the granulation process is divided into two steps of granulation and screening, and the desired light fine aggregate cannot be produced at one time. Additives other than binders were used: the raw material fine powder, ordinary portland cement, quartz fine powder and a cement expanding agent are mixed and stirred to obtain a mixture, and the cost of the particles produced by the method is high.
Disclosure of Invention
The invention aims to provide a tungsten tailing unfired lightweight fine aggregate formula and a preparation method thereof, and solves the technical problems in the background art.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a tungsten tailing non-fired light fine aggregate formula comprises 75-91% of tungsten tailing fine powder, 9-15% of portland cement and 0.15-1.35% of calcium oxide, and the water consumption is 80-120 g per kilogram of powder.
The tungsten tailing unfired lightweight fine aggregate formula comprises tungsten tailing fine powder, portland cement and calcium oxide, wherein the tungsten tailing fine powder comprises the following components in parts by weight: portland cement: the part ratio of calcium oxide is 85:15:0.15, and the water consumption is 80-120 g per kilogram of powder.
A preparation method of baking-free light fine aggregates of tungsten tailings is characterized by placing the formula mixture in claim 1 or claim 2 into a disc granulator for granulation treatment to obtain fine aggregates, wherein the rotating speed of the disc granulator is 20r/min-35r/min, the inclination angle of the disc granulator is 46-60 degrees, and the fine aggregates are steamed and cured at 80 ℃ for 1 day, the temperature is 20 ℃ and the humidity is 70% for 27 days to obtain the baking-free fine aggregates.
Further, mixing and stirring the tungsten tailing fine powder, portland cement and calcium oxide to obtain 2kg of a mixture, wherein the ratio of parts of the tungsten tailing fine powder to parts of the Portland cement to parts of the calcium oxide is 85:15:0.15, taking the mixture to carry out granulation treatment: and (3) steaming the fine aggregate for 1 day at the temperature of 80 ℃ under the condition that the rotation speed of a disc granulator is 30r/min, the inclination angle is 53 degrees and the water consumption is 120g, and curing for 27 days at the temperature of 20 ℃ and the humidity of 70 percent to obtain the baking-free fine aggregate.
Further, mixing and stirring the tungsten tailing fine powder, portland cement and calcium oxide to obtain 2kg of a mixture, wherein the ratio of parts of the tungsten tailing fine powder to parts of the Portland cement to parts of the calcium oxide is 85:15:0.45, taking the mixture for granulation treatment: and (3) curing the fine aggregate for 27 days at the conditions of the rotation speed of the disk granulator being 30r/min, the inclination angle being 53 degrees and the water consumption being 120g at 80 ℃ and the temperature being 20 ℃ and the humidity being 70% to obtain the baking-free fine aggregate.
Further, mixing and stirring the tungsten tailing fine powder, portland cement and a cement expanding agent to obtain 2kg of a mixture, wherein the ratio of parts of the tungsten tailing fine powder to parts of the Portland cement to parts of calcium oxide is 85:15:0.75, taking the mixture to carry out granulation treatment: and (3) curing the fine aggregate for 27 days at the conditions of the rotation speed of the disk granulator being 30r/min, the inclination angle being 53 degrees and the water consumption being 120g at 80 ℃ and the temperature being 20 ℃ and the humidity being 70% to obtain the baking-free fine aggregate.
Further, mixing and stirring the tungsten tailing fine powder, portland cement and calcium oxide to obtain 2kg of a mixture, wherein the ratio of parts of the tungsten tailing fine powder to parts of the Portland cement to parts of the calcium oxide is 85:15:1.05, taking the mixture to carry out granulation treatment: and (3) curing the fine aggregate for 27 days at the conditions of the rotation speed of the disk granulator being 30r/min, the inclination angle being 53 degrees and the water consumption being 120g at 80 ℃ and the temperature being 20 ℃ and the humidity being 70% to obtain the baking-free fine aggregate.
Further, mixing and stirring the tungsten tailing fine powder, portland cement and calcium oxide to obtain 2kg of a mixture, wherein the parts of the tungsten tailing fine powder, the portland cement and the calcium oxide are 85:15:1.35, taking the mixture to carry out granulation treatment: and (3) curing the fine aggregate for 27 days at the conditions of the rotation speed of the disk granulator being 30r/min, the inclination angle being 53 degrees and the water consumption being 120g at 80 ℃ and the temperature being 20 ℃ and the humidity being 70% to obtain the baking-free fine aggregate.
The lightweight aggregate concrete has the advantages of light weight, high strength, heat preservation, heat insulation and the like. Lightweight aggregate is one of the most key raw materials for preparing lightweight aggregate concrete. The ceramsite is artificial light aggregate with larger consumption at present, wherein the baking-free ceramsite has simple production process, low energy consumption, wide raw material selection range and wider application prospect. However, the prior non-sintered ceramsite product has higher density and lower strength. Therefore, the tungsten tailings are used as the main raw material of the lightweight aggregate, and the aim of recycling idle resources can be achieved.
The tungsten tailings used as the light fine aggregate formula comprises the following raw materials, by weight, 15% -20% of cement, 75% -80% of tungsten tailings and 1% -9% of calcium oxide; the ratio of water consumption to powder is 0.04-0.06; the rotating speed of the disc granulator is 20r/min-35r/min; the inclination angle of the disc granulator is 46-60 degrees.
The inclined angle and the rotating speed of the disc granulator jointly control the particle size, namely the particle grading, of the lightweight fine aggregate, the maintenance mode and the water quantity have important influence on the stacking density of the lightweight fine aggregate, and the hydration degree of cement is controlled through the water quantity, so that the compressive strength and the weight of the lightweight aggregate are controlled. Sufficient water is added during granulation to allow the powder to be rapidly shaped and to have a certain strength after curing for a period of time, but a high bulk density. Lower bulk densities can be achieved if less water is added, but the resulting pellets do not have strength.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
according to the invention, the tungsten tailings are molded by using simple binder-cement, the bulk density of the lightweight fine aggregate is improved by using expanding agent-calcium oxide, the manufactured lightweight fine aggregate can meet the national standard GB/T17431.1-2010 particle grading without screening, and the bulk density of the manufactured lightweight fine aggregate is 790kg/m after 28 days of maintenance 3 The calcium oxide with different proportions is used for mixing the tungsten tailings and the cement powder, and the bulk density of the produced particles is controlled by adjusting the mixing amount of the calcium oxide. The produced granules are primarily provided with certain strength after being maintained at high temperature for certain timeAdding water on the surface of the particles for supplement, and continuing high-temperature steam curing, so that the calcium oxide particles react with the water to generate calcium hydroxide, and the volume of the calcium hydroxide is 1 to 2 times of that of the calcium oxide, thereby achieving the purpose of reducing the bulk density
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to preferred embodiments. It should be noted, however, that the numerous details set forth in the description are merely for the purpose of providing the reader with a thorough understanding of one or more aspects of the present invention, which may be practiced without these specific details.
Examples 1 to 4: the tungsten tailing lightweight fine aggregate comprises the following raw materials: wherein the tungsten tailings account for the total powder: 75-91% of cement, the total powder is: 9-15 percent of calcium oxide, and the mixing amount of the calcium oxide is 1-9 parts; the water consumption is 80-120 g per kilogram of powder; the process conditions are as follows: the rotating speed of the disc granulator is 25r/min-35r/min; the inclination angle is 46-60 degrees.
The cement is portland cement, and the tungsten tailings are from medium-tungsten high-new material stocks, ltd. And mixing the materials by a grinding stirrer to obtain dry powder.
Putting the dry materials into a stirrer, adjusting a disc granulator to a certain rotating speed and a certain inclination angle, adding water for granulation, and maintaining.
Example 1: the preparation method of the baking-free lightweight fine aggregate prepared from the tungsten tailings provided by the embodiment comprises the following steps:
step one, mixing and stirring the tungsten tailing fine powder, portland cement and calcium oxide to obtain 2kg of a mixture, wherein the ratio of parts of the tungsten tailing fine powder to parts of the Portland cement to parts of the calcium oxide is 85:15:0.15;
and step two, taking the mixture for granulation treatment: the rotating speed of the disk granulator is 30r/min, the inclination angle is 53 degrees, and the water consumption is 120g;
and step three, steaming the fine aggregate at the temperature of 80 ℃ for 1 day, and curing at the temperature of 20 ℃ and the humidity of 70% for 27 days to obtain the baking-free fine aggregate.
Example 2: the preparation method of the baking-free lightweight fine aggregate prepared from the tungsten tailings provided by the embodiment comprises the following steps:
step one, mixing and stirring the tungsten tailing fine powder, portland cement and calcium oxide to obtain 2kg of a mixture, wherein the ratio of parts of the tungsten tailing fine powder to parts of the Portland cement to parts of the calcium oxide is 85:15:0.45 of;
and step two, taking the mixture for granulation treatment: the rotating speed of the disk granulator is 30r/min, the inclination angle is 53 degrees, and the water consumption is 120g;
and step three, steaming the fine aggregate at the temperature of 80 ℃ for 1 day, and curing at the temperature of 20 ℃ and the humidity of 70% for 27 days to obtain the baking-free fine aggregate.
Example 3: the preparation method of the baking-free lightweight fine aggregate prepared from the tungsten tailings provided by the embodiment comprises the following steps:
step one, mixing and stirring the tungsten tailing fine powder, portland cement and a cement expanding agent to obtain 2kg of a mixture, wherein the parts of the tungsten tailing fine powder, the Portland cement and calcium oxide are 85:15:0.75;
and step two, taking the mixture for granulation treatment: the rotating speed of the disk granulator is 30r/min, the inclination angle is 53 degrees, and the water consumption is 120g;
and step three, steaming the fine aggregate at the temperature of 80 ℃ for 1 day, and curing at the temperature of 20 ℃ and the humidity of 70% for 27 days to obtain the baking-free fine aggregate.
Example 4: the preparation method of the baking-free lightweight fine aggregate prepared from the tungsten tailings provided by the embodiment comprises the following steps:
step one, mixing and stirring the tungsten tailing fine powder, portland cement and calcium oxide to obtain 2kg of a mixture, wherein the ratio of parts of the tungsten tailing fine powder to parts of the Portland cement to parts of the calcium oxide is 85:15:1.05;
and step two, taking the mixture for granulation treatment: the rotating speed of the disk granulator is 30r/min, the inclination angle is 53 degrees, and the water consumption is 120g;
and step three, steaming the fine aggregate at the temperature of 80 ℃ for 1 day, and curing at the temperature of 20 ℃ and the humidity of 70% for 27 days to obtain the baking-free fine aggregate.
Example 5: the preparation method of the baking-free lightweight fine aggregate prepared from the tungsten tailings provided by the embodiment comprises the following steps:
step one, mixing and stirring the tungsten tailing fine powder, portland cement and calcium oxide to obtain 2kg of a mixture, wherein the ratio of parts of the tungsten tailing fine powder to parts of the Portland cement to parts of the calcium oxide is 85:15:1.35;
step two, taking the mixture to carry out granulation treatment: the rotating speed of the disk granulator is 30r/min, the inclination angle is 53 degrees, and the water consumption is 120g;
and step three, steaming the fine aggregate at the temperature of 80 ℃ for 1 day, and curing at the temperature of 20 ℃ and the humidity of 70% for 27 days to obtain the baking-free fine aggregate.
Example 6: the preparation method of the baking-free lightweight fine aggregate prepared from the tungsten tailings provided by the embodiment comprises the following steps:
step one, mixing and stirring the tungsten tailing fine powder, portland cement and calcium oxide to obtain 2kg of a mixture, wherein the ratio of the tungsten tailing fine powder to the Portland cement is 85:15;
and step two, taking the mixture for granulation treatment: the rotating speed of the disk granulator is 30r/min, the inclination angle is 53 degrees, and the water consumption is 120g;
and step three, steaming the fine aggregate at the temperature of 80 ℃ for 1 day, and curing at the temperature of 20 ℃ and the humidity of 70% for 27 days to obtain the baking-free fine aggregate.
TABLE 1 comparison of bulk densities in examples 1-6
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | |
| Bulk density (kg/m) 3 ) | 900 | 870 | 860 | 860 | 790 | 920 |
In examples 1 to 5 in which calcium oxide was added, the bulk density of the lightweight fine aggregate showed a tendency to decrease as the amount of calcium oxide added was increased. The examples doped with calcium oxide all had lower bulk densities than the example 6 not doped with calcium oxide. The formulation using the tungsten tailings and the cement enables the production of lightweight fine aggregates, and the formulation of example 5 enables the bulk density of the produced lightweight fine aggregates to be reduced to 790kg/m after 28 days of curing 3 。
The inclination angle and the rotation speed of the disc granulator jointly control the particle size, namely the particle grading, of the lightweight fine aggregate, the maintenance mode and the water quantity have important influence on the stacking density of the lightweight fine aggregate, and the hydration degree of cement is controlled through the water quantity, so that the compressive strength and the weight of the lightweight aggregate are controlled. Sufficient water is added during granulation to allow the powder to be rapidly shaped and to have a certain strength after curing for a period of time, but a high bulk density. Lower bulk densities can be achieved if less water is added, but the formed pellets do not have strength.
The formula uses calcium oxide mixed tungsten tailings and cement powder with different proportions, and controls the bulk density of the produced particles by adjusting the mixing amount of the calcium oxide. The produced particles are maintained at high temperature for a certain time, then the particles have certain strength, and the high-temperature steam curing is continued after the water is added to the surfaces of the particles for supplement, so that the calcium oxide particles react with the water to generate calcium hydroxide, and the volume of the calcium hydroxide is 1 to 2 times of that of the calcium oxide, thereby achieving the purpose of reducing the bulk density.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.
Claims (6)
1. The tungsten tailing unfired lightweight fine aggregate formula is characterized in that: comprises 75-91% of tungsten tailing fine powder, 9-15% of Portland cement and 0.15-1.35% of calcium oxide, and the water consumption is 80-120 g per kilogram of powder;
the preparation method of the tungsten tailing unfired lightweight fine aggregate comprises the following steps: and (2) placing the mixture of the formula into a disc granulator for granulation treatment to obtain fine aggregate, wherein the rotation speed of the disc granulator is 20-35 r/min, the inclination angle of the disc granulator is 46-60 ℃, and the fine aggregate is steamed and cured at the temperature of 80 ℃ for 1 day and at the temperature of 20 ℃ and the humidity of 70% for 27 days to obtain the baking-free fine aggregate.
2. The tungsten tailing unfired lightweight fine aggregate formula of claim 1, wherein the tungsten tailing unfired lightweight fine aggregate formula comprises:
and mixing and stirring the tungsten tailing fine powder, the portland cement and the calcium oxide to obtain 2kg of a mixture, wherein the ratio of the tungsten tailing fine powder to the portland cement to the calcium oxide is 85:15:0.15, taking the mixture to carry out granulation treatment: and (3) curing the fine aggregate for 27 days at the conditions of the rotation speed of the disk granulator being 30r/min, the inclination angle being 53 degrees and the water consumption being 120g at 80 ℃ and the temperature being 20 ℃ and the humidity being 70% to obtain the baking-free fine aggregate.
3. The tungsten tailing unfired lightweight fine aggregate formula of claim 1, wherein the tungsten tailing unfired lightweight fine aggregate formula comprises:
and mixing and stirring the tungsten tailing fine powder, the portland cement and the calcium oxide to obtain 2kg of a mixture, wherein the ratio of the tungsten tailing fine powder to the portland cement to the calcium oxide is 85:15:0.45, taking the mixture to carry out granulation treatment: and (3) steaming the fine aggregate for 1 day at the temperature of 80 ℃ under the condition that the rotation speed of a disc granulator is 30r/min, the inclination angle is 53 degrees and the water consumption is 120g, and curing for 27 days at the temperature of 20 ℃ and the humidity of 70 percent to obtain the baking-free fine aggregate.
4. The tungsten tailings non-fired lightweight fine aggregate formulation according to claim 1, wherein:
and mixing and stirring the tungsten tailing fine powder, the portland cement and the cement expanding agent to obtain 2kg of a mixture, wherein the ratio of the tungsten tailing fine powder to the portland cement to the calcium oxide is 85:15:0.75, taking the mixture to carry out granulation treatment: and (3) curing the fine aggregate for 27 days at the conditions of the rotation speed of the disk granulator being 30r/min, the inclination angle being 53 degrees and the water consumption being 120g at 80 ℃ and the temperature being 20 ℃ and the humidity being 70% to obtain the baking-free fine aggregate.
5. The tungsten tailings non-fired lightweight fine aggregate formulation according to claim 1, wherein:
and mixing and stirring the tungsten tailing fine powder, the portland cement and the calcium oxide to obtain 2kg of a mixture, wherein the ratio of the tungsten tailing fine powder to the portland cement to the calcium oxide is 85:15:1.05, taking the mixture to carry out granulation treatment: and (3) curing the fine aggregate for 27 days at the conditions of the rotation speed of the disk granulator being 30r/min, the inclination angle being 53 degrees and the water consumption being 120g at 80 ℃ and the temperature being 20 ℃ and the humidity being 70% to obtain the baking-free fine aggregate.
6. The tungsten tailings non-fired lightweight fine aggregate formulation according to claim 1, wherein:
and mixing and stirring the tungsten tailing fine powder, portland cement and calcium oxide to obtain 2kg of a mixture, wherein the part ratio of the tungsten tailing fine powder to the portland cement to the calcium oxide is 85:15:1.35, taking the mixture to carry out granulation treatment: and (3) curing the fine aggregate for 27 days at the conditions of the rotation speed of the disk granulator being 30r/min, the inclination angle being 53 degrees and the water consumption being 120g at 80 ℃ and the temperature being 20 ℃ and the humidity being 70% to obtain the baking-free fine aggregate.
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Effective date of registration: 20231226 Address after: 523378 Chaolong village, Chaolong village, Cha Shan town, Dongguan, Guangdong. Patentee after: DONGGUAN RUNYANG COMBINED WISDOM MANUFACTURING Co.,Ltd. Address before: 510460 no.488, Zhushui 1st Road, Shenshan, Jianggao Town, Baiyun District, Guangzhou City, Guangdong Province Patentee before: CHINA RESOURCES CEMENT TECHNOLOGY RESEARCH DEVELOPMENT Co.,Ltd. |
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