CN114538814B - Process for manufacturing baking-free lightweight aggregate by using tungsten tailings - Google Patents
Process for manufacturing baking-free lightweight aggregate by using tungsten tailings Download PDFInfo
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- CN114538814B CN114538814B CN202210051558.7A CN202210051558A CN114538814B CN 114538814 B CN114538814 B CN 114538814B CN 202210051558 A CN202210051558 A CN 202210051558A CN 114538814 B CN114538814 B CN 114538814B
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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
- 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
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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
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Abstract
The invention provides a process for manufacturing baking-free lightweight aggregate by using tungsten tailings, which belongs to the technical field of building decoration materials, wherein the tungsten tailings fine powder and Portland cement are mixed according to the parts ratio of 85-89 to 11-15 to obtain a mixed material, the mixed material is placed into a disc granulator for granulation treatment to obtain the fine aggregate, the rotating speed of the disc granulator is 20r/min-35r/min, the inclination angle of the disc granulator is 46-60 degrees, the mass ratio of water consumption to the mixed material is 2-3. According to the invention, the tungsten tailing powder is molded only by using a simple binder-cement, and the manufactured light fine aggregate can meet the national standard GB/T17431.1-2010 particle grading without screening.
Description
Technical Field
The invention relates to the technical field of building decoration materials, in particular to a process for manufacturing baking-free lightweight aggregate by using tungsten tailings.
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 pond, but the amount of newly-increased tailing slag is continuously increased, tungsten ore enterprises face the situation that the tailings do not have a storage place in the future, and the problem of tailing disposal becomes the core problem of the survival and development of the enterprises.
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 product, and screening the semi-finished aggregate product with the particle size of less than 4.75mm as fine aggregate and the semi-finished aggregate product 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 process for manufacturing baking-free lightweight aggregate by using tungsten tailings, which 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 process for manufacturing baking-free lightweight aggregate by using tungsten tailings comprises the following steps of mixing tungsten tailings fine powder and Portland cement in a proportion of 85-89 parts by weight to obtain a mixed material, putting the mixed material into a disc granulator for granulation treatment to obtain fine aggregate, wherein the rotating speed of the disc granulator is 20r/min-35r/min, the inclination angle of the disc granulator is 46-60 degrees, the mass ratio of water consumption to the mixed material is 2-3, and the fine aggregate is subjected to moisture preservation and maintenance at 90 ℃ for 1 day to obtain the baking-free fine aggregate.
Further, mixing and stirring the tungsten tailing fine powder and portland cement to obtain 2kg of a mixture, wherein the ratio of the parts of the tungsten tailing fine powder to the parts of the portland cement is 85: and 15, taking the mixture for granulation treatment: and (3) keeping the fine aggregate at 90 ℃ for 1 day by maintaining the fine aggregate at the rotation speed of 30r/min and the inclination angle of 53 degrees and using 120g of water, thus obtaining the baking-free fine aggregate.
Further, mixing and stirring the tungsten tailing fine powder and portland cement to obtain 2kg of a mixture, wherein the ratio of the parts of the tungsten tailing fine powder to the parts of the portland cement is 89: and 11, taking the mixture to carry out granulation treatment: and (3) keeping moisture and maintaining the fine aggregate at 90 ℃ for 1 day by using a disc granulator with the rotating speed of 25r/min, the inclination angle of 53 degrees and the water consumption of 80g to obtain the baking-free fine aggregate.
Further, mixing and stirring the tungsten tailing fine powder and portland cement to obtain 2kg of a mixture, wherein the ratio of the parts of the tungsten tailing fine powder to the parts of the portland cement is 89: and 11, taking the mixture for granulation treatment: and (3) keeping the fine aggregate at 90 ℃ for 1 day by maintaining the fine aggregate at the rotation speed of 30r/min and the inclination angle of 53 degrees and using 100g of water, thus obtaining the baking-free fine aggregate.
Further, mixing and stirring the tungsten tailing fine powder and portland cement to obtain 2kg of a mixture, wherein the ratio of the parts of the tungsten tailing fine powder to the parts of the portland cement is 89: and 11, taking the mixture for granulation treatment: and (3) keeping the fine aggregate at 90 ℃ for 1 day by maintaining the fine aggregate at the rotation speed of 35r/min and the inclination angle of 53 degrees and using 120g of water, thus obtaining the baking-free fine aggregate.
Further, mixing and stirring the tungsten tailing fine powder and portland cement to obtain 2kg of a mixture, wherein the ratio of the parts of the tungsten tailing fine powder to the parts of the portland cement is 87: and 13, taking the mixture to carry out granulation treatment: and (3) keeping the fine aggregate at 90 ℃ for 1 day by maintaining the fine aggregate at the rotation speed of 30r/min and the inclination angle of 53 degrees and using 80g of water, thus obtaining the baking-free fine aggregate.
Further, mixing and stirring the tungsten tailing fine powder and portland cement to obtain 2kg of a mixture, wherein the ratio of the parts of the tungsten tailing fine powder to the parts of the portland cement is 87: and 13, taking the mixture to carry out granulation treatment: and the rotation speed of the disk granulator is 35r/min, the inclination angle is 53 degrees, the water consumption is 100g, and the fine aggregate is maintained for 1 day at the temperature of 90 ℃ to obtain the baking-free fine aggregate.
Further, mixing and stirring the tungsten tailing fine powder and portland cement to obtain 2kg of a mixture, wherein the ratio of the parts of the tungsten tailing fine powder to the parts of the portland cement is 87: and 13, taking the mixture for granulation treatment: and (3) keeping the fine aggregate at 90 ℃ for 1 day by maintaining the fine aggregate at the rotation speed of 25r/min and the inclination angle of 53 degrees and using 120g of water, thus obtaining the baking-free fine aggregate.
Further, mixing and stirring the tungsten tailing fine powder and portland cement to obtain 2kg of a mixture, wherein the ratio of the parts of the tungsten tailing fine powder to the parts of the portland cement is 85: and 15, taking the mixture for granulation treatment: and the rotation speed of the disc granulator is 35r/min, the inclination angle is 53 degrees, the water consumption is 80g, and the fine aggregate is subjected to moisture preservation and maintenance at the temperature of 90 ℃ for 1 day to obtain the baking-free fine aggregate.
Further, mixing and stirring the tungsten tailing fine powder and portland cement to obtain 2kg of a mixture, wherein the ratio of the parts of the tungsten tailing fine powder to the parts of the portland cement is 85: and 15, taking the mixture for granulation treatment: and (3) keeping the fine aggregate at 90 ℃ for 1 day by maintaining the fine aggregate at the rotation speed of 25r/min and the inclination angle of 53 degrees and using 100g of water, thus obtaining 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 critical 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.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
(1) According to the invention, the tungsten tailing powder is molded only by using simple binder-cement, the manufactured light fine aggregate can meet the national standard GB/T17431.1-2010 particle grading without screening, the inclination angle and the rotating speed of a disk granulator jointly control the particle size of the light fine aggregate, namely the particle grading, the curing mode and the water consumption have important influence on the stacking density of the light fine aggregate, the hydration degree of cement is controlled by water quantity, so that the compressive strength and the weight of the light aggregate are controlled, sufficient water quantity is added in the granulating process to enable the powder to be rapidly molded, and the powder has certain strength after being cured for a period of time, but the stacking density is higher, and if the water quantity is less, the lower stacking density can be achieved, but the molded spherical particle has no strength. The process uses mixed powder of tungsten tailings and cement in different proportions, controls the grain gradation by adjusting the water consumption in the granulation process and the inclination angle and the rotation speed of a disc granulator, simultaneously preliminarily enables grains to have certain strength after being maintained at high temperature for a certain time, and continues to perform high-temperature steam curing after adding water on the surfaces of the grains, thereby achieving the purposes of enhancing the strength of small balls and reducing the bulk density.
(2) The process can produce the granulation process with the fineness modulus of 3.5 by mixing the tungsten tailings and the cement, can utilize the tungsten tailings in a higher proportion, and does not need to sieve the produced particles so as to simplify the operation flow. The granulation raw materials only use cement and tailing raw materials, and no additive is added to promote aggregate molding, so that the production cost can be reduced to a greater extent.
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. However, it should be noted that the numerous details set forth in the description are merely intended to provide a thorough understanding of one or more aspects of the present invention, even though such aspects of the invention may be practiced without these specific details.
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.
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 of:
step one, mixing and stirring the tungsten tailing fine powder and Portland cement to obtain 2kg of a mixture, wherein the ratio of the tungsten tailing fine powder to the Portland cement is 89:11;
step two, taking the mixture to carry out granulation treatment: the rotating speed of the disk granulator is 25r/min, the inclination angle is 53 degrees, and the water consumption is 80g;
and step three, moisturizing and curing the fine aggregate at the temperature of 90 ℃ for 1 day 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 and portland cement to obtain 2kg of a mixture, wherein the ratio of the tungsten tailing fine powder to the portland cement is 89:11;
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 100g;
and step three, moisturizing and curing the fine aggregate at the temperature of 90 ℃ for 1 day 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 and Portland cement to obtain 2kg of a mixture, wherein the ratio of the tungsten tailing fine powder to the Portland cement is 89:11;
and step two, taking the mixture for granulation treatment: the rotating speed of the disk granulator is 35r/min, the inclination angle is 53 degrees, and the water consumption is 120g;
and step three, moisturizing and curing the fine aggregate at the temperature of 90 ℃ for 1 day 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 and portland cement to obtain 2kg of a mixture, wherein the ratio of the tungsten tailing fine powder to the portland cement is 87:13;
and step two, taking the mixture for granulation treatment: the rotating speed of the disc granulator is 30r/min, the inclination angle is 53 degrees, and the water consumption is 80g;
and step three, moisturizing and curing the fine aggregate at the temperature of 90 ℃ for 1 day 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 and Portland cement to obtain 2kg of a mixture, wherein the ratio of the tungsten tailing fine powder to the Portland cement is 87:13;
and step two, taking the mixture for granulation treatment: the rotating speed of the disk granulator is 35r/min, the inclination angle is 53 degrees, and the water consumption is 100g;
and step three, moisturizing and curing the fine aggregate at the temperature of 90 ℃ for 1 day 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 and portland cement to obtain 2kg of a mixture, wherein the ratio of the tungsten tailing fine powder to the portland cement is 87:13;
and step two, taking the mixture for granulation treatment: the rotating speed of the disk granulator is 25r/min, the inclination angle is 53 degrees, and the water consumption is 120g;
and step three, moisturizing and curing the fine aggregate at the temperature of 90 ℃ for 1 day to obtain the baking-free fine aggregate.
Example 7: 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 and Portland cement 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 disc granulator is 35r/min, the inclination angle is 53 degrees, and the water consumption is 80g;
and step three, moisturizing and curing the fine aggregate at the temperature of 90 ℃ for 1 day to obtain the baking-free fine aggregate.
Example 8: 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 and Portland cement to obtain 2kg of a mixture, wherein the ratio of the tungsten tailing fine powder to the Portland cement is 85:15;
step two, taking the mixture to carry out granulation treatment: the rotating speed of the disk granulator is 25r/min, the inclination angle is 53 degrees, and the water consumption is 100g;
and step three, moisturizing and curing the fine aggregate at the temperature of 90 ℃ for 1 day to obtain the baking-free fine aggregate.
Example 9: the preparation method of the baking-free lightweight fine aggregate prepared from the tungsten tailings provided by the embodiment comprises the following steps of:
step one, mixing and stirring the tungsten tailing fine powder and Portland cement to obtain 2kg of a mixture, wherein the part ratio of the tungsten tailing fine powder to the Portland cement is 85:15;
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, maintaining the fine aggregate at the temperature of 90 ℃ for 1 day to obtain the baking-free fine aggregate.
Table 1 is a comparative table of the particle size distributions prepared in examples 1 to 9
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | Example 7 | Example 8 | Example 9 | |
| Particle size distribution | 4.7 | 4.8 | 4.6 | 4.2 | 3.9 | 4.3 | 3.8 | 3.5 | 3.6 |
The particle composition of all the examples is not determined by screening, wherein the particle composition of the examples 5, 7, 8 and 9 can reach the national standard of fineness modulus of the light fine aggregate (GB/T17431.1-2010). The tungsten tailing light fine aggregate can have fineness modulus meeting the national standard in a certain range by regulating and controlling different steps in the process.
The inclined angle and the rotating speed of the disc granulator jointly control the particle size of the light fine aggregate, namely the particle collection and distribution, the maintenance mode and the water consumption have important influence on the bulk density of the light fine aggregate, and the hydration degree of cement is controlled through the water quantity, so that the compressive strength and the weight of the light 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. The process uses mixed powder of tungsten tailings and cement in different proportions, and controls the grain composition by adjusting the water consumption in the granulation process and the inclination angle and the rotation speed of a disc granulator. Meanwhile, the granules are preliminarily made to have certain strength after being maintained at high temperature for certain time, and the high-temperature steam curing is continued after water is added to the surfaces of the granules, so that the aim of reducing the bulk density while enhancing the strength of the pellets is fulfilled.
The process can produce the granulation process with the fineness modulus of 3.5 by mixing the tungsten tailings and the cement, can utilize the tungsten tailings in a higher proportion, and does not need to sieve the produced particles so as to simplify the operation flow. The granulation raw materials only use cement and tailing raw materials, and no additive is added to promote the molding of the aggregate, so that the production cost can be reduced to a greater extent.
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 (10)
1. A process for manufacturing baking-free lightweight aggregate by using tungsten tailings is characterized by comprising the following steps: mixing the tungsten tailing fine powder and Portland cement in a proportion of 85-89 parts to obtain a mixed material, putting the mixed material into a disc granulator for granulation treatment to obtain fine aggregate, wherein the rotating speed of the disc granulator is 20-35 r/min, the inclination angle of the disc granulator is 53 degrees, the mass ratio of water consumption to the mixed material is 2-3, and maintaining the fine aggregate at 90 ℃ for 1 day to obtain the baking-free fine aggregate.
2. The process for manufacturing the baking-free lightweight aggregate by using the tungsten tailings as claimed in claim 1, wherein the process comprises the following steps: and mixing and stirring the tungsten tailing fine powder and portland cement to obtain 2kg of a mixture, wherein the ratio of the tungsten tailing fine powder to the portland cement is 85: and 15, taking the mixture for granulation treatment: the rotation speed of the disk granulator is 30r/min, the inclination angle is 53 degrees, the water consumption is 120g, and the fine aggregate is maintained for 1 day under the temperature of 90 ℃ to obtain the baking-free fine aggregate.
3. The process for manufacturing the baking-free lightweight aggregate by using the tungsten tailings as claimed in claim 1, wherein the process comprises the following steps: and mixing and stirring the tungsten tailing fine powder and portland cement to obtain 2kg of a mixture, wherein the ratio of the tungsten tailing fine powder to the portland cement is 89: and 11, taking the mixture for granulation treatment: and (3) maintaining the fine aggregate at 90 ℃ for 1 day by using a disc granulator with the rotating speed of 25r/min, the inclination angle of 53 degrees and the water consumption of 80g, so as to obtain the baking-free fine aggregate.
4. The process for manufacturing the baking-free lightweight aggregate by using the tungsten tailings as claimed in claim 1, wherein the process comprises the following steps: and mixing and stirring the tungsten tailing fine powder and Portland cement to obtain 2kg of a mixture, wherein the ratio of the tungsten tailing fine powder to the Portland cement is 89: and 11, taking the mixture for granulation treatment: the rotation speed of the disk granulator is 30r/min, the inclination angle is 53 degrees, the water consumption is 100g, and the fine aggregate is maintained for 1 day under the temperature of 90 ℃ to obtain the baking-free fine aggregate.
5. The process for manufacturing the baking-free lightweight aggregate by using the tungsten tailings as claimed in claim 1, wherein the process comprises the following steps: and mixing and stirring the tungsten tailing fine powder and Portland cement to obtain 2kg of a mixture, wherein the ratio of the tungsten tailing fine powder to the Portland cement is 89: and 11, taking the mixture for granulation treatment: and (3) maintaining the fine aggregate at 90 ℃ for 1 day by using water of 120g at the rotation speed of the disc granulator of 35r/min and the inclination angle of 53 degrees to obtain the baking-free fine aggregate.
6. The process for manufacturing the baking-free lightweight aggregate by using the tungsten tailings as claimed in claim 1, wherein the process comprises the following steps: and mixing and stirring the tungsten tailing fine powder and Portland cement to obtain 2kg of a mixture, wherein the ratio of the tungsten tailing fine powder to the Portland cement is 87: and 13, taking the mixture to carry out granulation treatment: the rotation speed of the disk granulator is 30r/min, the inclination angle is 53 degrees, the water consumption is 80g, and the fine aggregate is maintained for 1 day under the temperature of 90 ℃ to obtain the baking-free fine aggregate.
7. The process for manufacturing baking-free lightweight aggregate using tungsten tailings as claimed in claim 1, wherein: and mixing and stirring the tungsten tailing fine powder and portland cement to obtain 2kg of a mixture, wherein the ratio of the tungsten tailing fine powder to the portland cement is 87: and 13, taking the mixture for granulation treatment: the rotation speed of the disk granulator is 35r/min, the inclination angle is 53 degrees, the water consumption is 100g, and the fine aggregate is maintained for 1 day under the temperature of 90 ℃ to obtain the baking-free fine aggregate.
8. The process for manufacturing the baking-free lightweight aggregate by using the tungsten tailings as claimed in claim 1, wherein the process comprises the following steps: and mixing and stirring the tungsten tailing fine powder and Portland cement to obtain 2kg of a mixture, wherein the ratio of the tungsten tailing fine powder to the Portland cement is 87: and 13, taking the mixture to carry out granulation treatment: the rotation speed of the disk granulator is 25r/min, the inclination angle is 53 degrees, the water consumption is 120g, and the fine aggregate is maintained for 1 day under the temperature of 90 ℃ to obtain the baking-free fine aggregate.
9. The process for manufacturing the baking-free lightweight aggregate by using the tungsten tailings as claimed in claim 1, wherein the process comprises the following steps: and mixing and stirring the tungsten tailing fine powder and Portland cement to obtain 2kg of a mixture, wherein the ratio of the tungsten tailing fine powder to the Portland cement is 85:15, taking the mixture to carry out granulation treatment: the rotation speed of the disk granulator is 35r/min, the inclination angle is 53 degrees, the water consumption is 80g, and the fine aggregate is maintained for 1 day under the temperature of 90 ℃ to obtain the baking-free fine aggregate.
10. The process for manufacturing the baking-free lightweight aggregate by using the tungsten tailings as claimed in claim 1, wherein the process comprises the following steps: and mixing and stirring the tungsten tailing fine powder and portland cement to obtain 2kg of a mixture, wherein the ratio of the tungsten tailing fine powder to the portland cement is 85: and 15, taking the mixture for granulation treatment: the rotation speed of the disk granulator is 25r/min, the inclination angle is 53 degrees, the water consumption is 100g, and the fine aggregate is maintained for 1 day under the temperature of 90 ℃ to obtain the baking-free fine aggregate.
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| CN116354635A (en) * | 2022-11-28 | 2023-06-30 | 华润水泥技术研发有限公司 | Tungsten tailing-based phase-change heat storage aggregate and preparation method thereof |
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| CN109809726B (en) * | 2019-04-02 | 2021-07-06 | 江西理工大学 | Tungsten smelting waste residue ceramsite without additive components and preparation method thereof |
| CN110698157A (en) * | 2019-09-04 | 2020-01-17 | 中电建路桥集团有限公司 | Fly ash granulation method and filling aggregate by using all-solid-waste cementing material |
| CN111116070A (en) * | 2019-12-19 | 2020-05-08 | 广东清大同科环保技术有限公司 | Baking-free aggregate prepared from iron tailings and preparation method thereof |
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