CN114394770A - Preparation method of tungsten tailing cement admixture - Google Patents
Preparation method of tungsten tailing cement admixture Download PDFInfo
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- CN114394770A CN114394770A CN202111673465.XA CN202111673465A CN114394770A CN 114394770 A CN114394770 A CN 114394770A CN 202111673465 A CN202111673465 A CN 202111673465A CN 114394770 A CN114394770 A CN 114394770A
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- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 title claims abstract description 99
- 229910052721 tungsten Inorganic materials 0.000 title claims abstract description 99
- 239000010937 tungsten Substances 0.000 title claims abstract description 99
- 239000004568 cement Substances 0.000 title claims abstract description 38
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 238000001354 calcination Methods 0.000 claims abstract description 25
- 238000001816 cooling Methods 0.000 claims abstract description 15
- 238000000227 grinding Methods 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000003756 stirring Methods 0.000 claims abstract description 7
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 18
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- 230000004913 activation Effects 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 14
- 239000000126 substance Substances 0.000 claims description 14
- 238000004137 mechanical activation Methods 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 9
- 239000004115 Sodium Silicate Substances 0.000 claims description 6
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 6
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000000192 social effect Effects 0.000 abstract description 4
- 150000003657 tungsten Chemical class 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 230000008859 change Effects 0.000 abstract description 2
- 235000019580 granularity Nutrition 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 description 24
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 18
- 239000000292 calcium oxide Substances 0.000 description 9
- 235000012255 calcium oxide Nutrition 0.000 description 9
- 229910052500 inorganic mineral Inorganic materials 0.000 description 6
- 239000011707 mineral Substances 0.000 description 6
- 235000010755 mineral Nutrition 0.000 description 6
- 239000011398 Portland cement Substances 0.000 description 4
- 239000012190 activator Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000000498 ball milling Methods 0.000 description 2
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 2
- 239000002223 garnet Substances 0.000 description 2
- 238000010902 jet-milling Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910021532 Calcite Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000010433 feldspar Substances 0.000 description 1
- 239000010436 fluorite Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000003837 high-temperature calcination Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 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
- C04B7/00—Hydraulic cements
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/026—Comminuting, e.g. by grinding or breaking; Defibrillating fibres other than asbestos
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/04—Heat treatment
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a preparation method of a tungsten tailing cement admixture, which comprises the following steps: adding a certain amount of excitant according to the mass of the tungsten tailings, uniformly stirring to fully mix and react, and finishing the reaction for later use; placing the tungsten tailings after the reaction in a high-temperature furnace for calcining, and cooling to normal temperature for later use after the calcining is finished; and placing the calcined and cooled tungsten tailings into a mill for grinding for a certain time to obtain a mixed product. The method can improve the activity of the tungsten tailings, greatly improve the addition amount of the tungsten tailings to the maximum of 70%, and define the doping amount range and strength change of activated tungsten tailings with different granularities as a mixed material, thereby being beneficial to realizing large-scale utilization of the tungsten tailings in actual production and generating good economic effect and social effect.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a preparation method of a tungsten tailing cement admixture.
Background
The tungsten tailings are the residual tailings such as heavy metal tungsten, and the like, so that a large amount of tailings are produced in mineral separation of mine enterprises, and are currently stockpiled by establishing a tailings pond, and along with the restriction of the country on a newly-built tailings pond, the amount of newly-added tailings is continuously increased, so that the mine enterprises face the situation that the tailings are stockpiled everywhere, and the problem of tailings disposal becomes the core problem of the survival and development of the mine enterprises.
The Chinese patent application 201410242640.3 discloses a tungsten tailing cement admixture and application thereof, wherein the raw materials comprise tungsten tailings and quicklime, and the addition amount of the quicklime accounts for 0-15% of the mass of the tungsten tailings; the content of garnet in the tungsten tailings is higher than 70%. Preparing a cement admixture by performing mechanical activation and chemical activation on tungsten tailings, wherein the mechanical activation method is to prepare tungsten tailing fine powder by performing superfine processing and classification, the superfine processing comprises ball milling, jet milling or vibration milling, and the classification comprises screening and air classification; the chemical activation method comprises adding chemical activator which is quicklime; the application comprises preparing Portland cement with different labels meeting the national standard requirements by using tungsten tailing cement admixture, wherein the Portland cement contains the admixture accounting for 10-30% of the total mass of the cement. However, in the technical scheme, the doping amount of the tungsten tailings is 10-30%, the amount of the consumable tungsten tailings is small, the large-scale utilization of the tungsten tailings cannot be well realized, the production cost of cement is reduced slightly, in the formulas 1-6 listed in the example 3, only 2% of quicklime is doped in the formula 6, but the strength data tested by the formula 6 is reduced, and the strength of the quicklime added with the activator in the cement admixture prepared by the scheme is reduced, so that the quality of the admixture is difficult to ensure.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the preparation method of the tungsten tailing cement admixture, which can improve the activity of the tungsten tailings, greatly improve the addition amount of the tungsten tailings to the maximum of 70%, and clarify the mixing amount range and strength change of activated tungsten tailings with different granularities as the admixture, is beneficial to realizing large-scale utilization of the tungsten tailings in actual production, and generates good economic effect and social effect.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows:
a preparation method of a tungsten tailing cement admixture comprises the following steps:
(1) chemical activation: adding a certain amount of excitant according to the mass of the tungsten tailings, uniformly stirring to fully mix and react, and finishing the reaction for later use;
(2) high-temperature activation: placing the tungsten tailings reacted in the step (1) into a high-temperature furnace for calcining, and cooling to normal temperature for later use after calcining;
(3) mechanical activation: and placing the calcined and cooled tungsten tailings into a mill for grinding for a certain time to obtain a mixed product.
Further, in the step (1), the addition amount of the exciting agent is 10-25%.
Further, the activator is one or a mixture of two of sodium hydroxide, sodium silicate and potassium hydroxide.
Further, the exciting agent is added into the tungsten tailings, the exciting agent is firstly dissolved in water to form a solution, then the solution is added in a solution form, and the exciting agent solution and the tungsten tailings are mixed and then react for 1-5 hours.
Further, in the step (2), the calcination temperature is 750-.
Further, in the step (3), the grinding time is determined according to the required particle size, and the specific surface area of the ground tungsten tailings is 450-2/kg。
The application method of the tungsten tailing cement admixture prepared by the preparation method is characterized in that the highest addition amount of the tungsten tailing cement admixture is in direct proportion to the specific surface area.
The tungsten tailings are solid materials formed by dehydrating fine tailing pulp discharged after tungsten-containing minerals are finely selected from tungsten ores through grinding, generally mainly comprise ore minerals and surrounding rock minerals, mainly comprise minerals such as quartz, fluorite, garnet, feldspar, mica, calcite and the like, and some polymetallic ores containing a small amount of molybdenum, bismuth and the likeThe main chemical components of the material are as follows: SiO 22、Al2O3、CaO、CaF2、MgO、Fe2O3And the like.
The tungsten tailings have the following characteristics: the tungsten tailings contain some rare metal minerals and non-metal ores, and the resource utilization rate can be effectively improved through further extraction; the tungsten tailings are stable in chemical property. The hardness is high, and the color is light; the tungsten tailings have finer particles, most of which are smaller than 200 meshes, and have great advantages in some applications requiring finer particle sizes.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. according to the invention, the tungsten tailings are activated by adopting a chemical-high temperature-mechanical combined activation technology, and a quenching process is adopted after high-temperature calcination, so that the implementation process is simple, the time consumption of the preparation process is short, the tungsten tailings can be effectively activated, and the activity of the tungsten tailings is improved;
2. the invention improves the addition amount of the tungsten tailing cement mixed material, can effectively reduce the using amount of cement, reduces the production cost of the cement, can treat tungsten tailings in large batch and has better economic effect and social effect;
3. the tungsten tailing cement admixture prepared by the invention discloses the addition range of activated tungsten tailings with different particle sizes as the admixture, and the specific surface area is 450m2The optimum specific surface area is selected, the energy consumption is increased along with the increase of the specific surface area, the application of the tungsten tailings in actual production is facilitated, and the data is real and reliable after multiple tests.
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.
Example 1
A preparation method of a tungsten tailing cement admixture comprises the following steps:
(1) chemical activation: adding 10% of exciting agent according to the mass of the tungsten tailings, uniformly stirring to fully mix and react, wherein the exciting agent is one or a mixture of two of sodium hydroxide, sodium silicate and potassium hydroxide, the exciting agent is added into the tungsten tailings, the exciting agent is firstly dissolved in water to form a solution, then the solution is added in a solution form, the exciting agent solution is mixed with the tungsten tailings and then reacts for 5 hours, and the reaction is finished for later use;
(2) high-temperature activation: calcining the tungsten tailings reacted in the step (1) in a high-temperature furnace, cooling to normal temperature for later use after calcining, wherein the calcining temperature is 750 ℃, the calcining time is 3 hours, and the cooling mode is rapid cooling;
(3) mechanical activation: placing the calcined and cooled tungsten tailings into a mill for grinding for a certain time to obtain a mixed product, wherein the grinding time is determined according to the required particle size, and the specific surface area of the ground tungsten tailings is 450m2/kg。
Example 2
A preparation method of a tungsten tailing cement admixture comprises the following steps:
(1) chemical activation: adding 15% of an exciting agent according to the mass of the tungsten tailings, uniformly stirring to fully mix and react, wherein the exciting agent is one or a mixture of two of sodium hydroxide, sodium silicate and potassium hydroxide, the exciting agent is added into the tungsten tailings, the exciting agent is firstly dissolved in water to form a solution, then the solution is added in a solution form, the exciting agent solution is mixed with the tungsten tailings and then reacts for 2 hours, and the reaction is finished for later use;
(2) high-temperature activation: calcining the tungsten tailings reacted in the step (1) in a high-temperature furnace, cooling to normal temperature for later use after calcining, wherein the calcining temperature is 850 ℃, the calcining time is 2 hours, and the cooling mode is rapid cooling;
(3) mechanical activation: placing the calcined and cooled tungsten tailings into a mill for grinding for a certain time to obtain a mixed product, wherein the grinding time is determined according to the required particle size, and the specific surface area of the ground tungsten tailings is 550m2/kg。
Example 3
A preparation method of a tungsten tailing cement admixture comprises the following steps:
(1) chemical activation: adding 20% of an exciting agent according to the mass of the tungsten tailings, uniformly stirring to fully mix and react, wherein the exciting agent is one or a mixture of two of sodium hydroxide, sodium silicate and potassium hydroxide, the exciting agent is added into the tungsten tailings, the exciting agent is firstly dissolved in water to form a solution, then the solution is added in a solution form, the exciting agent solution is mixed with the tungsten tailings and then reacts for 3 hours, and the reaction is finished for later use;
(2) high-temperature activation: calcining the tungsten tailings reacted in the step (1) in a high-temperature furnace, cooling to normal temperature for later use after calcining, wherein the calcining temperature is 900 ℃, the calcining time is 2 hours, and the cooling mode is rapid cooling;
(3) mechanical activation: placing the calcined and cooled tungsten tailings into a mill for grinding for a certain time to obtain a mixed product, wherein the grinding time is determined according to the required particle size, and the specific surface area of the ground tungsten tailings is 850m2/kg。
Example 4
A preparation method of a tungsten tailing cement admixture comprises the following steps:
(1) chemical activation: adding 25% of an exciting agent according to the mass of the tungsten tailings, uniformly stirring to fully mix and react, wherein the exciting agent is one or a mixture of two of sodium hydroxide, sodium silicate and potassium hydroxide, the exciting agent is added into the tungsten tailings, the exciting agent is firstly dissolved in water to form a solution, then the solution is added in a solution form, the exciting agent solution is mixed with the tungsten tailings and then reacts for 1 hour, and the reaction is finished for later use;
(2) high-temperature activation: calcining the tungsten tailings reacted in the step (1) in a high-temperature furnace, cooling to normal temperature for later use after calcining, wherein the calcining temperature is 1000 ℃, the calcining time is 1h, and the cooling mode is rapid cooling;
(3) mechanical activation: placing the calcined and cooled tungsten tailings into a mill for grinding for a certain time to obtain a mixed product, wherein the grinding time is determined according to the required particle size, and the specific surface area of the ground tungsten tailings is 1000m2/kg。
Comparative example 1
The tungsten tailing cement admixture of the comparative example comprises tungsten tailings, quicklime and tungsten tailingsThe ore mixing amount is 30 percent, and the addition amount of the quicklime accounts for 2 percent of the mass of the tungsten tailings. Preparing a cement admixture by performing mechanical activation and chemical activation on tungsten tailings, wherein the mechanical activation method is to prepare tungsten tailing fine powder by performing superfine processing and classification, the superfine processing comprises ball milling, jet milling or vibration milling, and the classification comprises screening and air classification; the chemical activation method comprises adding chemical activator which is quicklime; the application comprises preparing Portland cement with different labels meeting the national standard requirements by using tungsten tailing cement admixture, grinding the Portland cement containing the admixture accounting for 10-30% of the total mass of the cement to a specific surface area of 550m2/kg。
The cement admixtures prepared in examples 1 to 4 and the cement admixtures of tungsten tailings prepared in comparative example 1 were subjected to the test of compressive strength, and the specific data were as follows:
table 1 tungsten tailings cement admixture blending amount range and compressive strength data of different specific surface areas:
as can be seen from the above table, the mixing amount range of the activated tungsten tailing cement admixture with different specific surface areas in the examples 1 to 4 is clear, the large-scale utilization of the tungsten tailings in the actual production is facilitated, the cement production cost is reduced, and the economic effect and the social effect are better. And after the addition amount of the tungsten tailings is increased, the compressive strength of the tungsten tailing cement admixture prepared in the comparative example 1 is greatly reduced, and the product quality is difficult to ensure.
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 (7)
1. The preparation method of the tungsten tailing cement admixture is characterized by comprising the following steps:
(1) chemical activation: adding a certain amount of excitant according to the mass of the tungsten tailings, uniformly stirring to fully mix and react, and finishing the reaction for later use;
(2) high-temperature activation: placing the tungsten tailings reacted in the step (1) into a high-temperature furnace for calcining, and cooling to normal temperature for later use after calcining;
(3) mechanical activation: and placing the calcined and cooled tungsten tailings into a mill for grinding for a certain time to obtain a mixed product.
2. The method for preparing the tungsten tailing cement admixture as claimed in claim 1, wherein the amount of the excitant added in the step (1) is 10-25%.
3. The method for preparing the tungsten tailings cement admixture as claimed in claim 2, wherein the excitant is one or a mixture of two of sodium hydroxide, sodium silicate and potassium hydroxide.
4. The method for preparing the tungsten tailing cement admixture as claimed in claim 3, wherein the adding of the excitant to the tungsten tailings is carried out by firstly dissolving the excitant in water to form a solution, then adding the solution in a solution form, and reacting the excitant solution and the tungsten tailings after mixing for 1-5 h.
5. The method as claimed in claim 1, wherein in the step (2), the calcination temperature is 750-1000 ℃ and the calcination time is 1-3 h.
6. The method as claimed in claim 1, wherein in the step (3), the grinding time is determined according to the required particle size, and the specific surface area of the ground tungsten tailings is 450-1000m2/kg。
7. A method for using the tungsten-tailing cement mixture prepared by the preparation method according to claims 1 to 6, wherein the maximum addition amount of the tungsten-tailing cement mixture is proportional to the specific surface area.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115448629A (en) * | 2022-09-21 | 2022-12-09 | 北京华晟创元环境科技有限公司 | Tungsten tailing slag superfine composite mineral admixture and preparation method thereof |
| CN115716718A (en) * | 2022-11-21 | 2023-02-28 | 华润水泥技术研发有限公司 | Cement prepared from tungsten tailings and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103288371A (en) * | 2013-05-20 | 2013-09-11 | 中南大学 | Tungsten tailing concrete admixture and application thereof |
| CN103979808A (en) * | 2014-06-04 | 2014-08-13 | 中南大学 | Cement admixture prepared from tungsten tailings and application of cement admixture |
| CN104496433A (en) * | 2015-01-04 | 2015-04-08 | 中南大学 | High-strength ceramic mainly prepared from tungsten tailings and preparation method of high-strength ceramic |
| CN110128042A (en) * | 2019-06-18 | 2019-08-16 | 湖南华晟创元环境科技有限公司 | A kind of technique preparing active addition of cement, concrete admixture with Tungsten tailing |
| CN110590198A (en) * | 2019-08-29 | 2019-12-20 | 广东清大同科环保技术有限公司 | Tungsten tailing cementing material and preparation method thereof |
| CN111606613A (en) * | 2020-06-17 | 2020-09-01 | 湘潭大学 | Tungsten tailing powder geopolymer mortar and preparation method thereof |
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2021
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| CN103288371A (en) * | 2013-05-20 | 2013-09-11 | 中南大学 | Tungsten tailing concrete admixture and application thereof |
| CN103979808A (en) * | 2014-06-04 | 2014-08-13 | 中南大学 | Cement admixture prepared from tungsten tailings and application of cement admixture |
| CN104496433A (en) * | 2015-01-04 | 2015-04-08 | 中南大学 | High-strength ceramic mainly prepared from tungsten tailings and preparation method of high-strength ceramic |
| CN110128042A (en) * | 2019-06-18 | 2019-08-16 | 湖南华晟创元环境科技有限公司 | A kind of technique preparing active addition of cement, concrete admixture with Tungsten tailing |
| CN110590198A (en) * | 2019-08-29 | 2019-12-20 | 广东清大同科环保技术有限公司 | Tungsten tailing cementing material and preparation method thereof |
| CN111606613A (en) * | 2020-06-17 | 2020-09-01 | 湘潭大学 | Tungsten tailing powder geopolymer mortar and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115448629A (en) * | 2022-09-21 | 2022-12-09 | 北京华晟创元环境科技有限公司 | Tungsten tailing slag superfine composite mineral admixture and preparation method thereof |
| CN115448629B (en) * | 2022-09-21 | 2023-05-05 | 北京华晟创元环境科技有限公司 | Tungsten tailing slag superfine composite mineral admixture and preparation method thereof |
| CN115716718A (en) * | 2022-11-21 | 2023-02-28 | 华润水泥技术研发有限公司 | Cement prepared from tungsten tailings and preparation method thereof |
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