CN111072296A - Quick-setting filling cementing material - Google Patents
Quick-setting filling cementing material Download PDFInfo
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- CN111072296A CN111072296A CN201911334757.3A CN201911334757A CN111072296A CN 111072296 A CN111072296 A CN 111072296A CN 201911334757 A CN201911334757 A CN 201911334757A CN 111072296 A CN111072296 A CN 111072296A
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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
- C04B7/00—Hydraulic cements
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
- C04B7/153—Mixtures thereof with other inorganic cementitious materials or other activators
- C04B7/1535—Mixtures thereof with other inorganic cementitious materials or other activators with alkali metal containing activators, e.g. sodium hydroxide or waterglass
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/08—Slag cements
- C04B28/082—Steelmaking slags; Converter slags
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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
- 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
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/346—Materials exhibiting reduced plastic shrinkage cracking
-
- 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
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention discloses a quick-setting filling cementing material, which comprises the following components in parts by weight: 40-90 parts of slag powder, 6-24 parts of cement clinker, 2-18 parts of bentonite, 2-28 parts of steel slag powder, 0-15 parts of modified gypsum, 0.5-10 parts of alkaline excitant, 0-10 parts of coagulant, 1-3 parts of water reducing agent, 0.2-8 parts of anti-cracking material and 0.5-10 parts of suspending agent.
Description
Technical Field
The invention relates to the technical field of underground filling of metal mines, in particular to a quick-setting filling cementing material.
Background
The cut-and-fill mining method refers to a mining method in which a gob is filled with a filler along with ore breaking, transportation and other operations, and may be classified into two types, namely, cemented filling and non-cemented filling. The cemented filling is widely applied, and the material sources are waste rocks accumulated on the ground surface, waste rocks at the edge of a driving pit, tailings of a concentrating mill, slag of a smelting plant, Gobi aggregates, rocks mined from the ground surface and the like.
With the wide application of the filling mining method in metal mines, in order to reduce the production cost and improve the safety of mining after filling, the filling material of cemented filling is mostly prepared from tailings of ore dressing plants and slag of smelting plants, and is pumped and injected into a filling area, so that the cementing material has the characteristics of good fluidity, difficult pipe blockage, good flowing property, wide raw material source, rich resources, large tolerance to fine grain parts in the tailings, high strength, no segregation and delamination of slurry under a certain concentration, small water seepage amount and the like, and becomes a preferred choice for selecting the cementing material for filling in many mine units. However, compared with portland cement, in slurry prepared from tailings of a concentrating mill and slag of a smelting plant, the shrinkage of the slag alkali-activated material is large, and when the concentration of slurry subsequently prepared with the tailings is low, particularly under the condition of improper maintenance, adverse phenomena such as large shrinkage, slow condensation, cracking and the like of a filling body in a mining area easily occur, so that the slag alkali-activated material cannot play a role in increasing the overall alkalinity of the material and products of calcium silicate hydrate and ettringite in the filling body in the mining area.
Disclosure of Invention
The invention provides a quick-setting filling cementing material, which solves the technical problems of large shrinkage, long setting time, low early strength and the like of a slag-based filling material under the condition of slurry low-concentration filling in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention provides a quick-setting filling cementing material which comprises the following components in parts by weight: 40-90 parts of slag powder, 6-24 parts of cement clinker, 2-18 parts of bentonite, 2-28 parts of steel slag powder, 0-15 parts of modified gypsum, 0.5-10 parts of alkaline excitant, 0-10 parts of coagulant, 1-3 parts of water reducing agent, 0.2-8 parts of anti-cracking material and 0.5-10 parts of suspending agent.
Further, the quick-setting filling cementing material comprises the following components in parts by weight: 45 parts of slag powder, 20 parts of cement clinker, 3 parts of bentonite, 10 parts of steel slag powder, 10 parts of modified gypsum, 2 parts of alkaline excitant, 5 parts of coagulant, 3 parts of water reducing agent, 3 parts of anti-cracking material and 2 parts of suspending agent.
Further, the slag powder has a specific surface area of at least 480m2A/kg by-product of industrial copper metallurgy.
Further, the slag powder is slag micro-powder formed by quenching, drying, crushing and grinding granulated blast furnace slag.
Further, the specific surface area of the cement clinker is at least 450m2/kg of Portland cement clinker, the steel slag powder has a specific surface area of at least 500m2Per kg of converter slag.
Further, the modified gypsum has a specific surface area of at least 500m2The alkaline excitant is ground into powder with the specific surface area of 450m2A mixture of refining slag and sodium hydroxide per kg.
Further, the anti-cracking material is polyvinyl alcohol fiber with the length of 5-7 mm.
Further, the coagulant is formed by mixing calcium chloride, calcium formate and sodium sulfate according to the mass ratio of 4:1: 1.
Further, the suspending agent material is formed by mixing redispersible latex powder, kaolin and cellulose ether according to the mass ratio of 1:13: 1.
A low-retraction rapid-setting mine filling slurry is prepared by uniformly mixing a rapid-setting filling cementing material with a sand-lime ratio of 1:4-1:16 and superfine copper ore tailings to prepare the low-retraction rapid-setting mine filling slurry with the tailing concentration of 60% -65%.
The invention has the following beneficial effects:
according to the invention, through researching the functions of the mine filling cementing material, slag powder, cement clinker, steel slag powder, bentonite, modified gypsum, an alkaline activator, a coagulant, an anti-cracking material and a suspending agent are selected as the mine filling cementing material, and the mixture ratio of the slag powder, the cement clinker, the steel slag powder, the bentonite, the modified gypsum, the alkaline activator, the coagulant, the anti-cracking material and the suspending agent is subjected to adaptability research, so that the low-shrinkage fast-setting mine filling slurry which can effectively reduce the additive dosage, has good flowing property and high early strength is finally obtained, the low-shrinkage fast-setting mine filling slurry has the characteristics of keeping good strength and volume stability and the like, and all properties exceed those. Wherein: the steel slag and clinker with high specific surface area react with water quickly to provide required alkalinity and calcium ions for hydration of slag powder, and simultaneously react with the modified gypsum quickly to generate hydrated calcium silicate and ettringite which can achieve a very good gelling effect; the refining slag and the sodium hydroxide in the alkaline excitant are added together, so that the content of calcium ions, hydroxide ions and aluminum ions in the filling slurry can be effectively improved, and the overall alkalinity of the material and the products of hydrated calcium silicate and ettringite can be increased; calcium formate, calcium chloride and sodium sulfate in the coagulant can play a role in enhancing and activating the slag together, and can effectively improve the early strength of the filling body, so that hydration products of ettringite and hydrated calcium silicate gel form a compact gel material; the redispersible latex powder, the cellulose ether and the kaolin in the suspending agent can effectively prevent the loss of the cementing powder along with the water circulation flow so as to improve the water retention of the filling slurry; the fine kaolin particles have good dispersion effect, so that the aggregation of slurry particles can be effectively prevented, the slurry particles are uniformly distributed, and the stability of filling slurry is improved; the kaolin has good expansibility, and can effectively reduce the prestress generated by contraction and rock mass around a filling body, thereby forming good volume stability to improve the performances such as compression resistance, durability and the like; and a small amount of anti-cracking material is added to improve the anti-cracking effect of the filling body. The quick-setting filling slurry comprises the prepared mine filling cementing material and the ultrafine tailing sand with the ash-sand ratio of less than 400 meshes being 1:4-1:16, the strength of a filling body prepared by the low-retraction quick-setting mine filling slurry is 1.5-2.5 times or more of that of a cement filling body under the condition of the same proportion, and the filling body has the excellent performances of easiness in pumping, quickness in setting, good anti-cracking effect, low cost and the like.
Detailed Description
The following describes embodiments of the present invention in further detail through a description of examples. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to solve the technical problems that the slag-based filling material in the prior art has large shrinkage, long setting time, low early strength and the like under the condition of low-concentration filling of slurry.
In order to solve the technical problems, the invention provides a rapid-setting filling cementing material which comprises the following components in parts by weight: 40-90 parts of slag powder, 6-24 parts of cement clinker, 2-18 parts of bentonite, 2-28 parts of steel slag powder, 0-15 parts of modified gypsum, 0.5-10 parts of alkaline excitant, 0-10 parts of coagulant, 1-3 parts of water reducing agent, 0.2-8 parts of anti-cracking material and 0.5-10 parts of suspending agent.
Specific fast setting filled cementitious materials are illustrated in connection with the following examples:
example 1
The raw materials are uniformly mixed according to the composition and the mixture ratio, wherein the raw materials comprise 55 parts of slag powder, 10 parts of cement clinker, 3 parts of bentonite, 10 parts of steel slag powder, 15 parts of modified gypsum, 5 parts of alkaline excitant, 2 parts of coagulant, 3 parts of water reducer, 0.5 part of polyvinyl alcohol fiber with the length of 4mm and 1 part of suspending agent, and the mixture is prepared into the fast-setting filling cementing material.
And (3) uniformly mixing the quick-setting filling cementing materials with different ash-sand ratios (1:5 and 1:10) with the superfine copper ore tailings to prepare the low-retraction early-strength type quick-setting mine filling slurry. Wherein: the grading of the superfine copper ore tailings is 10.75 percent of-60 meshes, 19.09 percent of +100 meshes, 42.82 percent of-100 +200 meshes, 9.68 percent of-200 +300 meshes, 7.13 percent of-300 +400 meshes and 10.53 percent of-400 meshes.
And (3) grouting the prepared low-retraction rapid-setting mine filling slurry into a goaf for filling in a pumping mode, wherein: uniformly mixing a quick-setting filling cementing material with a lime-sand ratio of (1:5) with superfine copper ore tailings to prepare low-retraction quick-setting mine filling slurry, wherein the concentration of the copper ore tailings is 63.9%, the setting time of the low-retraction quick-setting mine filling slurry only needs 10min, the retraction rate is 0.6%, and the compressive strengths of a mine filling body measured by 3d, 7d and 28d are 1.0MPa, 3.2MPa and 4.4MPa respectively;
the rapid-setting filling cementing material with the ash-sand ratio of (1:10) and the superfine copper ore tailings are uniformly mixed to prepare the low-retraction rapid-setting mine filling slurry, the concentration of the copper ore tailings is 64.1%, the setting time of the low-retraction rapid-setting mine filling slurry only needs 20min, the retraction rate is 2.2%, and the compressive strengths of the mine filling body measured by 3d, 7d and 28d are respectively 0.8MPa, 1.5MPa and 2.2 MPa.
Therefore, when the quick-setting filling cementing material is the same, the smaller the sand-lime ratio is, the longer the setting time is, the larger the retraction rate is, and the lower the compressive strength of the mine filling body is.
Comparative example 1
The cement with different ash-sand ratios (1:5 and 1:10) and the copper ore tailings are uniformly mixed, and the concentration of the copper ore tailings is 65 percent. Wherein: the grading of the copper ore tailings is 10.75 percent of +60 meshes, 19.09 percent of +100 meshes, 42.82 percent of-100 +200 meshes, 9.68 percent of-200 +300 meshes, 7.13 percent of-300 +400 meshes and 10.53 percent of-400 meshes.
And (3) grouting the prepared mine filling slurry to a goaf for filling in a pumping mode, wherein: the cement with the ash-sand ratio of (1:5) and the copper ore tailings are uniformly mixed to prepare the mine filling slurry, the concentration of the copper ore tailings is 65.1 percent, the setting time of the mine filling slurry is only 20min, the retraction rate is 3.9 percent, and the compressive strengths of the mine filling body measured by 3d, 7d and 28d are 0.1MPa, 0.4MPa and 1.1MPa respectively;
the mine filling slurry is prepared by uniformly mixing cement and copper mine tailings with a lime-sand ratio of (1:10), the concentration of the copper mine tailings is 65.3%, the setting time of the profile mine filling slurry is only 38min, the retraction rate is 5.5%, and the compressive strengths of the mine filling body measured by 3d, 7d and 28d are 0.1MPa, 0.3MPa and 0.5MPa respectively.
It can be seen that when cement is used as a filling cement, the smaller the sand-lime ratio, the longer the setting time, the greater the shrinkage rate, and the lower the compressive strength of the mine filling material.
As can be seen from example 1 and comparative example 1, compared with the ordinary cement mine filling slurry, under the condition that the ash-sand ratio is the same and the concentration of the copper mine tailings is similar, the setting time and the retraction rate of the low-retraction rapid-setting mine filling slurry are far shorter than those of the ordinary cement mine filling slurry, and the compressive strength of the low-retraction rapid-setting mine filling slurry is far higher than that of the ordinary cement mine filling slurry.
Therefore, the invention researches the functions of the filling cementing material, selects slag powder, cement clinker, steel slag ultrafine powder, bentonite, modified gypsum, an alkaline exciting agent, a coagulant, an anti-cracking material and a suspending agent as the filling cementing material, and carries out adaptability research on the mixture ratio of the materials, thereby finally obtaining the fast-setting mine filling slurry which can effectively reduce the additive dosage and has good flowing property and higher early strength.
The above description is only exemplary of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The quick-setting filling cementing material is characterized by comprising the following components in parts by weight: 40-90 parts of slag powder, 6-24 parts of cement clinker, 2-18 parts of bentonite, 2-28 parts of steel slag powder, 0-15 parts of modified gypsum, 0.5-10 parts of alkaline excitant, 0-10 parts of coagulant, 1-3 parts of water reducing agent, 0.2-8 parts of anti-cracking material and 0.5-10 parts of suspending agent.
2. The rapid-setting filled cementitious material of claim 1, wherein the rapid-setting filled cementitious material comprises the following components in parts by weight: 45 parts of slag powder, 20 parts of cement clinker, 3 parts of bentonite, 10 parts of steel slag powder, 10 parts of modified gypsum, 2 parts of alkaline excitant, 5 parts of coagulant, 3 parts of water reducing agent, 3 parts of anti-cracking material and 2 parts of suspending agent.
3. The rapid-setting filled cementitious material of claim 1, characterised in that the slag powder has a specific surface area of at least 480m2A/kg by-product of industrial copper metallurgy.
4. The rapid-setting filling cementitious material of claim 3, wherein the slag powder is a slag micropowder obtained by quenching, drying, crushing and grinding granulated blast furnace slag.
5. The rapid-setting cementitious filling material according to claim 1, characterised in that the cement clinker has a specific surface area of at least 450m2/kg of Portland cement clinker, the steel slag powder has a specific surface area of at least 500m2Per kg of converter slag.
6. The rapid-setting filled cementitious material of claim 1, wherein said modified gypsum has a specific surface area of at least 500m2The alkaline excitant is ground into powder with the specific surface area of 450m2A mixture of refining slag and sodium hydroxide per kg.
7. The rapid-setting filled cementitious material of claim 1, wherein the crack resistant material is polyvinyl alcohol fibers having a length of 5-7 mm.
8. The rapid-setting filling cementitious material of claim 1, wherein the coagulant is a mixture of calcium chloride, calcium formate and sodium sulfate in a mass ratio of 4:1: 1.
9. The rapid-setting filling cementitious material of claim 1, wherein the suspending agent material is formed by mixing redispersible latex powder, kaolin and cellulose ether according to a mass ratio of 1:13: 1.
10. A low-retraction quick-setting mine filling slurry is prepared by uniformly mixing the quick-setting filling cementing material of claims 1 to 9 with the ratio of ash to sand of 1:4 to 1:16 and superfine copper ore tailings to prepare the low-retraction quick-setting mine filling slurry with the concentration of the tailings of 60 to 65 percent.
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| CN201911334757.3A CN111072296A (en) | 2019-12-23 | 2019-12-23 | Quick-setting filling cementing material |
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| CN201911334757.3A CN111072296A (en) | 2019-12-23 | 2019-12-23 | Quick-setting filling cementing material |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112194451A (en) * | 2020-08-31 | 2021-01-08 | 广东韶钢嘉羊新型材料有限公司 | Cementing agent composition for filling mine and preparation method thereof |
| CN112250395A (en) * | 2020-10-27 | 2021-01-22 | 西北矿冶研究院 | Broken rock stratum roadway wall thickness grouting material and preparation method thereof |
| CN112552004A (en) * | 2020-12-11 | 2021-03-26 | 铜陵有色金属集团铜冠建筑安装股份有限公司 | Cementing material using copper smelting water quenching slag powder and preparation method thereof |
| CN112707712A (en) * | 2021-01-15 | 2021-04-27 | 上海宝钢新型建材科技有限公司 | Paste filling material containing superfine tail mud and preparation method and application thereof |
| CN113121179A (en) * | 2021-04-13 | 2021-07-16 | 上海茶卡科技发展有限公司 | High-fluidity quick-setting filling cementing material under low-temperature condition |
| CN114057418A (en) * | 2021-11-18 | 2022-02-18 | 铜陵铜冠建安新型环保建材科技有限公司 | Anti-segregation type special cementing material suitable for coarse tailings and suitable for filling |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112194451A (en) * | 2020-08-31 | 2021-01-08 | 广东韶钢嘉羊新型材料有限公司 | Cementing agent composition for filling mine and preparation method thereof |
| CN112194451B (en) * | 2020-08-31 | 2023-08-11 | 广东韶钢嘉羊新型材料有限公司 | Cementing agent composition for filling mine and preparation method thereof |
| CN112250395A (en) * | 2020-10-27 | 2021-01-22 | 西北矿冶研究院 | Broken rock stratum roadway wall thickness grouting material and preparation method thereof |
| CN112552004A (en) * | 2020-12-11 | 2021-03-26 | 铜陵有色金属集团铜冠建筑安装股份有限公司 | Cementing material using copper smelting water quenching slag powder and preparation method thereof |
| CN112707712A (en) * | 2021-01-15 | 2021-04-27 | 上海宝钢新型建材科技有限公司 | Paste filling material containing superfine tail mud and preparation method and application thereof |
| CN113121179A (en) * | 2021-04-13 | 2021-07-16 | 上海茶卡科技发展有限公司 | High-fluidity quick-setting filling cementing material under low-temperature condition |
| CN114057418A (en) * | 2021-11-18 | 2022-02-18 | 铜陵铜冠建安新型环保建材科技有限公司 | Anti-segregation type special cementing material suitable for coarse tailings and suitable for filling |
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Application publication date: 20200428 |
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