CN112876158A - Cementing material capable of realizing fine-grade tailing filling and preparation method thereof - Google Patents
Cementing material capable of realizing fine-grade tailing filling and preparation method thereof Download PDFInfo
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- CN112876158A CN112876158A CN202110147469.8A CN202110147469A CN112876158A CN 112876158 A CN112876158 A CN 112876158A CN 202110147469 A CN202110147469 A CN 202110147469A CN 112876158 A CN112876158 A CN 112876158A
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- cementing material
- material capable
- desulfurized gypsum
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
-
- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention discloses a cementing material capable of realizing fine-grade tailing filling and a preparation method thereof, wherein the cementing material comprises the following components in parts by weight: 18-31 parts of sintered desulfurized gypsum, 10-30 parts of Portland cement, 30-50 parts of slag powder and 1-9 parts of an excitant. The cementing material and the preparation method thereof disclosed by the invention can fully utilize fine-grained tailings, solve the problems that a large amount of tailings occupy land and pollute the environment, improve the filling strength and improve the mining safety.
Description
Technical Field
The invention relates to the technical field of fillers for mining, in particular to a cementing material capable of realizing fine-grade tailing filling and a preparation method thereof.
Background
For modern ore mining, because the mined ore has low grade and cannot be directly smelted, the ore concentrate product meeting the smelting requirement can be produced only by mineral processing, so that a large amount of tailings are discharged. In order to improve the beneficiation efficiency, different beneficiation processes are needed, the fineness of the discharged tailings is different, and the fineness of the tailings with the finest particle fraction reaches more than 90 percent of minus 325 meshes. The main mode of tailing utilization at present is mine underground filling, and the existing filling mode adopts filling C materials (formed by mixing cement and slag powder) as filling and solidifying cementing materials, and the cementing materials have poor solidifying capability on fine-grain tailings and can only be suitable for mixed filling of graded coarse tailings to meet the strength requirement. Moreover, the wear of the pipeline is accelerated after the coarse tailings are filled, and the production cost is increased.
A great amount of fine-grained yarn still has no good utilization mode, if the fine-grained yarn is not utilized, the fine-grained yarn is piled in the open air, and finally a tailing dam is formed, so that a great amount of arable land is occupied, and the environment is polluted. Therefore, the development and utilization of the fine-grade tailings are imperative.
Disclosure of Invention
In order to solve the technical problems, the invention provides the cementing material capable of realizing fine-fraction tailing filling and the preparation method thereof, so that the fine-fraction tailing is fully utilized, the problems that a large amount of tailing occupies land and pollutes the environment are solved, and the filling strength is improved.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a cementing material capable of realizing fine-grade tailing filling comprises the following components in parts by weight: 18-31 parts of sintered desulfurized gypsum, 10-30 parts of Portland cement, 30-50 parts of slag powder and 1-9 parts of an excitant.
In the scheme, the sintered desulfurized gypsum is a flue gas desulfurization product in a sintering process of a steel plant, and the specific surface area of the dried ground powder is more than 400 square meters.
In the scheme, the portland cement is 425# ordinary portland cement.
In the scheme, the slag powder is fine powder of blast furnace granulated slag, and the specific surface area is more than 450 square meters.
In the above scheme, the activator is an alkaline activator.
In the scheme, the alkaline activator is industrial sodium sulfate.
Preferably, the composition comprises the following components in parts by weight: 20 parts of sintered desulfurized gypsum, 25 parts of Portland cement, 40 parts of slag powder and 6 parts of excitant.
A preparation method of a cementing material capable of realizing fine-grade tailing filling comprises the following steps:
(1) dehydrating and drying the sintered desulfurized gypsum, grinding the dehydrated and dried sintered desulfurized gypsum by a grinding machine, and screening the ground desulfurized gypsum to below 200 meshes with a specific surface area of more than 400 square meters;
(2) drying and grinding the exciting agent;
(3) adding the slag powder, the sintered desulfurized gypsum and the excitant powder into a closed mixer according to the parts by weight after metering, and fully and uniformly mixing;
(4) adding Portland cement according to the parts by weight, and uniformly mixing;
(5) and (5) metering, bagging, sealing and preventing moisture.
Through the technical scheme, the cementing material capable of realizing fine-grade tailing filling and the preparation method thereof provided by the invention have the following beneficial effects:
1) the invention can realize classification of the tailings, realize underground filling after proportioning of fine fraction and cementing material, and carry out external selling on coarse fraction, thereby not only solving the problem of insufficient storage capacity of tailings, but also bringing considerable economic benefit for enterprises.
2) The invention realizes the balance of inlet and outlet and can meet the underground production requirement.
3) The use of the cementing material of the invention replaces the use of the material C, thereby reducing the comprehensive filling cost.
4) The fine particle level is high-concentration (60%) filled, the abrasion to the pipeline is small, and the service life of the pipeline is prolonged.
5) The bleeding quantity of the underground filling slurry is reduced, the underground operation environment is effectively improved, the workload of cleaning the precipitated sludge can be effectively reduced, and the underground drainage and sludge discharge cost is reduced.
6) Meanwhile, the novel cementing material with a fine-grained proportion is adopted for filling, so that the reduction of the strength of a filling body caused by taking away the cementing material by bleeding can be avoided, the strength and the roof contact rate of the filling body are improved, the displacement of surrounding rocks of a top plate can be effectively controlled, the stress concentration is reduced, and the mining safety is improved.
7) The early strength of the filling body is good under the same condition, 1.5mpa can be achieved in 24 hours, the production organization is convenient, the production efficiency is improved, the mining loss and dilution rate can be effectively reduced, and the promotion cost and the mineral separation cost are reduced.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below.
Example 1
A cementing material capable of realizing fine-grade tailing filling comprises the following components in parts by weight: 18 parts of sintered desulfurized gypsum, 30 parts of Portland cement, 50 parts of slag powder and 1 part of excitant.
The sintered desulfurized gypsum is a flue gas desulfurization product in a sintering procedure of an iron and steel plant, and the specific surface area of the ground powder is over 400 square meters after the flue gas desulfurization product is dried.
The portland cement is 425# ordinary portland cement.
The slag powder is fine powder of blast furnace granulated slag, and the specific surface area is more than 450 square meters.
The excitant is alkaline excitant industrial sodium sulfate.
Example 2
A cementing material capable of realizing fine-grade tailing filling comprises the following components in parts by weight: 31 parts of sintered desulfurized gypsum, 10 parts of Portland cement, 30 parts of slag powder and 9 parts of excitant.
The sintered desulfurized gypsum is a flue gas desulfurization product in a sintering procedure of an iron and steel plant, and the specific surface area of the ground powder is over 400 square meters after the flue gas desulfurization product is dried.
The portland cement is 425# ordinary portland cement.
The slag powder is fine powder of blast furnace granulated slag, and the specific surface area is more than 450 square meters.
The excitant is alkaline excitant industrial sodium sulfate.
Example 3
A cementing material capable of realizing fine-grade tailing filling comprises the following components in parts by weight: 20 parts of sintered desulfurized gypsum, 25 parts of Portland cement, 40 parts of slag powder and 6 parts of excitant.
The sintered desulfurized gypsum is a flue gas desulfurization product in a sintering procedure of an iron and steel plant, and the specific surface area of the ground powder is over 400 square meters after the flue gas desulfurization product is dried.
The portland cement is 425# ordinary portland cement.
The slag powder is fine powder of blast furnace granulated slag, and the specific surface area is more than 450 square meters.
The excitant is alkaline excitant industrial sodium sulfate.
Comparative example 1
A cementing material capable of realizing fine-grade tailing filling comprises the following components in parts by weight: 20 parts of sintered desulfurized gypsum, 25 parts of Portland cement, 40 parts of slag powder and 10 parts of excitant.
The sintered desulfurized gypsum is a flue gas desulfurization product in a sintering procedure of an iron and steel plant, and the specific surface area of the ground powder is over 400 square meters after the flue gas desulfurization product is dried.
The portland cement is 425# ordinary portland cement.
The slag powder is fine powder of blast furnace granulated slag, and the specific surface area is more than 450 square meters.
The excitant is alkaline excitant industrial sodium sulfate.
Comparative example 2
A cementing material capable of realizing fine-grade tailing filling comprises the following components in parts by weight: 20 parts of sintered desulfurized gypsum, 25 parts of Portland cement, 40 parts of slag powder and 0.5 part of excitant.
The sintered desulfurized gypsum is a flue gas desulfurization product in a sintering procedure of an iron and steel plant, and the specific surface area of the ground powder is over 400 square meters after the flue gas desulfurization product is dried.
The portland cement is 425# ordinary portland cement.
The slag powder is fine powder of blast furnace granulated slag, and the specific surface area is more than 450 square meters.
The excitant is alkaline excitant industrial sodium sulfate.
Comparative example 3
A cementing material capable of realizing fine-grade tailing filling comprises the following components in parts by weight: 32 parts of sintered desulfurized gypsum, 25 parts of Portland cement, 40 parts of slag powder and 6 parts of an excitant.
The sintered desulfurized gypsum is a flue gas desulfurization product in a sintering procedure of an iron and steel plant, and the specific surface area of the ground powder is over 400 square meters after the flue gas desulfurization product is dried.
The portland cement is 425# ordinary portland cement.
The slag powder is fine powder of blast furnace granulated slag, and the specific surface area is more than 450 square meters.
The excitant is alkaline excitant industrial sodium sulfate.
Comparative example 4
A cementing material capable of realizing fine-grade tailing filling comprises the following components in parts by weight: 17 parts of sintered desulfurized gypsum, 25 parts of Portland cement, 40 parts of slag powder and 6 parts of an excitant.
The sintered desulfurized gypsum is a flue gas desulfurization product in a sintering procedure of an iron and steel plant, and the specific surface area of the ground powder is over 400 square meters after the flue gas desulfurization product is dried.
The portland cement is 425# ordinary portland cement.
The slag powder is fine powder of blast furnace granulated slag, and the specific surface area is more than 450 square meters.
The excitant is alkaline excitant industrial sodium sulfate.
A preparation method of a cementing material capable of realizing fine-grade tailing filling comprises the following steps:
(1) dehydrating and drying the sintered desulfurized gypsum, grinding the dehydrated and dried sintered desulfurized gypsum by a grinding machine, and screening the ground desulfurized gypsum to below 200 meshes with a specific surface area of more than 400 square meters;
(2) drying and grinding the exciting agent;
(3) adding the slag powder, the sintered desulfurized gypsum and the excitant powder into a closed mixer according to the parts by weight after metering, and fully and uniformly mixing;
(4) adding Portland cement according to the parts by weight, and uniformly mixing;
(5) and (5) metering, bagging, sealing and preventing moisture.
The cementing materials prepared in the above examples 1 to 4 and comparative examples 1 to 4 were subjected to fine-grade tailing filling experiments, and performance tests were carried out, specifically as follows:
1. the results of the fine fraction tailings strength tests are shown in table 1.
Table 1 fine fraction tailings strength test results
As can be seen from Table 1, at a pack concentration of 60, example 3 exhibited a very good compressive strength, while the compressive strengths of examples 1 to 3 significantly exceeded those of comparative examples 1 to 4, indicating that a very good compressive strength could be achieved within the range of the amount defined in the present invention, and that satisfactory compressive strength could not be achieved with the ranges of the components of comparative examples 1 to 4 outside the range of the amount defined in the present invention. Meanwhile, compared with the existing P.C32.5 grade cement, the compressive strength of the cement of the invention in examples 1-3 and comparative examples 1-4 is obviously higher than that of the existing P.C32.5 grade cement.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The cementing material capable of realizing fine-grade tailing filling is characterized by comprising the following components in parts by weight: 18-31 parts of sintered desulfurized gypsum, 10-30 parts of Portland cement, 30-50 parts of slag powder and 1-9 parts of an excitant.
2. The cementing material capable of realizing fine-grained tailing filling according to claim 1, wherein the sintered desulfurized gypsum is a flue gas desulfurization product obtained in a sintering process of a steel plant, and the specific surface area of the dried pulverized powder is more than 400 square meters.
3. The cementing material capable of realizing fine-grade tailing filling according to claim 1, wherein the portland cement is 425# Portland cement.
4. The cementing material capable of realizing fine-grade tailing filling according to claim 1, wherein the slag powder is fine ground blast furnace water slag with a specific surface area of more than 450 square meters.
5. The cementing material capable of realizing fine-grade tailing filling according to claim 1, wherein the activator is an alkaline activator.
6. The cementing material capable of realizing fine-grade tailing filling according to claim 5, wherein the alkali activator is industrial sodium sulfate.
7. The cementing material capable of realizing fine-grade tailing filling according to claim 1, characterized by comprising the following components in parts by weight: 20 parts of sintered desulfurized gypsum, 25 parts of Portland cement, 40 parts of slag powder and 6 parts of excitant.
8. The preparation method of the cementing material capable of realizing fine-grade tailing filling according to claim 1, characterized by comprising the following steps:
(1) dehydrating and drying the sintered desulfurized gypsum, grinding the dehydrated and dried sintered desulfurized gypsum by a grinding machine, and screening the ground desulfurized gypsum to below 200 meshes with a specific surface area of more than 400 square meters;
(2) drying and grinding the exciting agent;
(3) adding the slag powder, the sintered desulfurized gypsum and the excitant powder into a closed mixer according to the parts by weight after metering, and fully and uniformly mixing;
(4) adding Portland cement according to the parts by weight, and uniformly mixing;
(5) and (5) metering, bagging, sealing and preventing moisture.
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| CN202110147469.8A CN112876158A (en) | 2021-02-03 | 2021-02-03 | Cementing material capable of realizing fine-grade tailing filling and preparation method thereof |
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| CN202110147469.8A CN112876158A (en) | 2021-02-03 | 2021-02-03 | Cementing material capable of realizing fine-grade tailing filling and preparation method thereof |
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Citations (9)
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|---|---|---|---|---|
| CA1258269A (en) * | 1986-08-29 | 1989-08-08 | Standard Slag Cement A Standard Industries Company A Division Of Canada Cement Lafarge Ltd. | Cementitious binder for consolidated fill |
| CN101343167A (en) * | 2007-07-10 | 2009-01-14 | 中国矿业大学(北京) | Backfilled enclosed material and its use method |
| CN101691291A (en) * | 2009-09-29 | 2010-04-07 | 北京科技大学 | Method for producing pasty unclassified tailing filling materials containing red mud |
| CN101786854A (en) * | 2010-03-22 | 2010-07-28 | 南京工业大学 | Tailing cementing material |
| CN102562148A (en) * | 2012-01-11 | 2012-07-11 | 昆明理工大学 | Iron tailings cementing-filling method |
| CN106045443A (en) * | 2016-05-31 | 2016-10-26 | 贾志奎 | Tailing cementing agent |
| CN106746785A (en) * | 2017-02-03 | 2017-05-31 | 北京华德创业环保设备有限公司 | A kind of lower shrinkage early-strength filling in mine Binder Materials |
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2021
- 2021-02-03 CN CN202110147469.8A patent/CN112876158A/en active Pending
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Application publication date: 20210601 |