CN111196688A - Method for preparing composite cementing material by using iron tailing powder, slag micro powder and desulfurized ash - Google Patents
Method for preparing composite cementing material by using iron tailing powder, slag micro powder and desulfurized ash Download PDFInfo
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- CN111196688A CN111196688A CN202010027312.7A CN202010027312A CN111196688A CN 111196688 A CN111196688 A CN 111196688A CN 202010027312 A CN202010027312 A CN 202010027312A CN 111196688 A CN111196688 A CN 111196688A
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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
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/243—Mixtures thereof with activators or composition-correcting additives, e.g. mixtures of fly ash and alkali activators
-
- 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
- C04B7/17—Mixtures thereof with other inorganic cementitious materials or other activators with calcium oxide containing activators
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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
- C04B7/21—Mixtures thereof with other inorganic cementitious materials or other activators with calcium sulfate containing activators
-
- 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
- C04B7/22—Iron ore cements ; Iron rich cements, e.g. Ferrari cements, Kühl cements
-
- 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
- C04B7/36—Manufacture of hydraulic cements in general
-
- 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)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a composite cementing material prepared from iron tailing powder, slag micro powder and desulfurized ash, which comprises the following raw materials in parts by weight: 0-42 parts of iron tailing powder, 41-80 parts of slag micro powder, 9-28 parts of quick lime, 3-13 parts of desulfurized ash and 4-17 parts of gypsum, and the preparation method comprises the following steps: adding the raw materials into a container with good tightness, shaking and turning over after sealing, standing for 15 minutes, repeating the operation for 3-4 times, and placing the composite cementing material which is well stood in a dry environment to obtain the composite cementing material prepared from iron tailing powder, slag micro powder and desulfurized ash. The invention utilizes the iron tailing powder, the slag micro powder and the desulfurized ash to prepare the composite cementing material, overcomes the problem of insufficient cementing activity of the iron tailing powder, obviously improves the utilization rate of the iron tailing powder, the slag micro powder and the desulfurized ash, reduces the environmental burden and has obvious economic benefit and social benefit.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a method for preparing a composite cementing material by using iron tailing powder, slag micro powder and desulfurized fly ash.
Background
The iron tailing powder is waste residue generated in the process of separating iron fine powder from iron ore, the annual discharge amount is up to 1.5 hundred million tons, the iron tailing powder accounts for about 60 percent of the amount of the selected iron ore, the accumulated stock in China reaches 50 hundred million tons, but the utilization rate is only 7 percent, and the iron tailing powder is a large solid waste with the lowest comprehensive utilization rate. Because the physical and chemical properties of the iron tailings powder are very similar to those of natural sand, the secondary utilization of the iron tailings powder at present mainly uses the iron tailings powder as a fine aggregate to replace the natural sand to prepare building materials. However, the idea of using iron ore tailings powder with a small particle size as a concrete aggregate has been difficult. In addition, the slag micro powder is a byproduct in the blast furnace ironmaking process, is also waste slag with small particle size, and has the utilization rate of only 10 percent. Therefore, how to better utilize the iron tailing powder and the slag micro powder and expand the application range of the iron tailing powder is a problem which needs to be solved urgently at present.
The desulfurized ash is SO in industrial exhaust gas2Reacting with an absorbent and evaporating water at high temperature to form grey white powdery particles, and the application of the grey desulfurized by China is currently researchedIn the stage, because the components of the desulfurization ash are extremely complex and consist of various components such as a desulfurizing agent, a desulfurization product, fly ash and the like, and the desulfurization ash has unstable properties in the utilization process, a large amount of desulfurization ash is stacked and discarded. Therefore, the activity and alkali excitation performance of the industrial wastes are utilized, the potential material characteristics of the industrial wastes are fully exerted, the high-performance composite cementing material is prepared, the resource reutilization is realized, the material consumption way is expanded, the burden of relieving land resources and environmental resources is obviously reduced, and the economic benefit and the social benefit are greater.
Disclosure of Invention
The invention provides a method for preparing a composite cementing material by using iron tailing powder, slag micro powder and desulfurized ash, aiming at the problems that waste in the steel industry pollutes the environment and occupies the land. The invention fully utilizes industrial wastes such as iron tailing powder, slag micro powder and desulfurization ash, overcomes the problem of insufficient gelling activity of the iron tailing powder by performing alkaline excitation on the slag micro powder and the iron tailing powder, obviously improves the utilization rate of the iron tailing powder, the slag micro powder and the desulfurization ash, and reduces the environmental burden.
In order to achieve the purpose, the invention is realized by the following scheme:
the invention provides a method for preparing a composite cementing material by using iron tailing powder, slag micro powder and desulfurized fly ash, which is characterized in that the composite cementing material comprises the iron tailing powder, the slag micro powder, quicklime, desulfurized fly ash and gypsum, and the preparation method comprises the following steps:
(1) drying the iron tailing powder to ensure that the material presents dry powdery particles;
(2) weighing various materials according to the weight parts of 0-42 parts of iron tailing powder, 41-80 parts of slag micro powder, 9-28 parts of quicklime, 3-13 parts of desulfurized ash and 4-17 parts of gypsum for later use;
(3) adding the standby material into a container with good tightness, shaking and turning after sealing, standing for 15 minutes, and repeating the operation for 3-4 times;
(4) and (3) storing the composite gelled material which is well stood in a dry environment to obtain the composite gelled material.
Further, the particle size range of the iron tailing powder is below 80 μm.
Further, the fine slag powder is granulated blast furnace slag with a fineness modulus of 0.983.
Further, the desulfurized fly ash is obtained from a gypsum wet desulfurization process.
The invention has the beneficial effects that:
(1) the invention relates to a composite cementing material prepared by using iron tailings powder, slag micro powder and desulfurization ash, which improves the utilization rate of the iron tailings powder, the slag micro powder and the desulfurization ash, and solves the problems of stacking and environment pollution of wastes.
(2) The main components of the iron tailing powder and the slag micro powder are SiO2CaO, which is a solid waste with potential pozzolanic activity, is used for performing alkaline excitation on the slag micro powder and the iron tailing powder by utilizing the activity and the potential hydraulicity of the iron tailing powder and the slag micro powder per se to remove SO in the ash3Provides sulfate ions for further conversion of silicate, is beneficial to formation of calcium sulfosilicate hydrate gel, overcomes the problem of insufficient gelling activity of iron tailing powder, does not need to carry out early activation on the iron tailing powder, has simple process and reduces the treatment cost of the iron tailing powder.
(3) Compared with the common No. 42.5 cement, the cost of the cementing material is only 16.8 percent of that of the No. 42.5 cement, and the 28d uniaxial compressive strength is 1.24-2.81 times of that of the No. 42.5 cement.
Therefore, the slag micro powder, the iron tailing powder and the desulfurized ash are used for preparing the composite cementing material, the problem of insufficient cementing activity of the iron tailing powder is solved, the utilization rates of the iron tailing powder, the slag micro powder and the desulfurized ash are obviously improved, the environmental pollution is reduced, the natural environment is protected, and the composite cementing material has obvious economic benefit and social benefit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
In the embodiment of the invention, the particle size range of the iron tailings powder is below 80um, the superfine slag powder is granulated blast furnace slag, the fineness modulus is 0.983, the desulfurized ash is obtained by a gypsum wet desulphurization process, and the chemical compositions of the iron tailings powder, the superfine slag powder and the desulfurized ash are shown in tables 1 to 3 by adopting X-ray fluorescence spectrum analysis (XRF):
table 1 main chemical composition of iron ore tailings powder (%)
Table 2 fine slag powder main chemical composition (%)
Table 3 main chemical composition of desulfurized fly ash (%)
Example 1
(1) Drying the iron tailing powder to ensure that the material presents dry powdery particles;
(2) weighing various materials according to the weight of 10 parts of iron tailing powder, 65 parts of slag micro powder, 15 parts of quicklime, 5 parts of desulfurized ash and 5 parts of gypsum for later use;
(3) adding the standby material into a container with good tightness, shaking and turning after sealing, standing for 15 minutes, and repeating the operation for 4 times;
(4) and (3) storing the composite gelled material which is well stood in a dry environment to obtain the composite gelled material.
Example 2
(1) Drying the iron tailing powder to ensure that the material presents dry powdery particles;
(2) weighing various materials according to the weight parts of 20 parts of iron tailing powder, 55 parts of slag micro powder, 15 parts of quick lime, 5 parts of desulfurized ash and 5 parts of gypsum for later use;
(3) adding the standby material into a container with good tightness, shaking and turning after sealing, standing for 15 minutes, and repeating the operation for 4 times;
(4) and (3) storing the composite gelled material which is well stood in a dry environment to obtain the composite gelled material.
Example 3
(1) Drying the iron tailing powder to ensure that the material presents dry powdery particles;
(2) weighing various materials according to 30 parts of iron tailing powder, 45 parts of slag micro powder, 15 parts of quick lime, 5 parts of desulfurized ash and 5 parts of gypsum by weight for later use;
(3) adding the standby material into a container with good tightness, shaking and turning after sealing, standing for 15 minutes, and repeating the operation for 4 times;
(4) and (3) storing the composite gelled material which is well stood in a dry environment to obtain the composite gelled material.
Example 4
(1) Drying the iron tailing powder to ensure that the material presents dry powdery particles;
(2) weighing various materials according to the weight parts of 0 part of iron tailing powder, 75 parts of slag micro powder, 15 parts of quicklime, 5 parts of desulfurized ash and 5 parts of gypsum for later use;
(3) adding the standby material into a container with good tightness, shaking and turning after sealing, standing for 15 minutes, and repeating the operation for 4 times;
(4) and (3) storing the composite gelled material which is well stood in a dry environment to obtain the composite gelled material.
Comparative example 1
(1) Weighing 75 parts of 42.5# cement, 15 parts of quicklime, 5 parts of desulfurized fly ash, 5 parts of gypsum and 3 parts of an additive for later use;
(2) adding the standby material into a container with good tightness, shaking and turning after sealing, standing for 15 minutes, and repeating the operation for 4 times;
(3) and (3) storing the composite gelled material which is well stood in a dry environment to obtain the composite gelled material.
Performance detection
According to the national standard GB/T17671-1999 cement mortar strength test method (IOS method), the cementing materials prepared in examples 1-4 are stirred and formed with IOS standard sand according to the specified water cement ratio, after water is added and stirred, test blocks of 40mm x 160mm are prepared, the test blocks are placed in a standard curing box for curing for 48 hours, the mold is removed, the test blocks are placed in a curing box at the temperature of 20 +/-1 ℃ for water curing, the flexural strength and the uniaxial compressive strength of the composite cementing materials 3d, 7d and 28d are detected, and the test results of the flexural strength and the compressive strength of the composite cementing materials are obtained and are shown in Table 4.
TABLE 4 composite cementitious Material Strength and compressive Strength
As shown in Table 4, the cost of the composite cementing material prepared by using the iron tailing powder, the slag micro powder and the desulfurized ash is only 16.8 percent of that of 42.5# cement, and the 28d uniaxial compressive strength is 1.24-2.81 times that of 42.5# cement. The invention overcomes the problem of insufficient gelling activity of the iron tailing powder, and has practical use value. Therefore, the composite cementing material is prepared from the iron tailing powder, the slag micro powder and the desulfurization ash, the utilization rates of the iron tailing powder, the slag micro powder and the desulfurization ash are obviously improved, and the composite cementing material has obvious economic and social benefits.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (7)
1. A method for preparing a composite cementing material by using iron tailing powder, slag micro powder and desulfurized ash is characterized in that the composite cementing material comprises the iron tailing powder, the slag micro powder, quicklime, desulfurized ash and gypsum, and the preparation method comprises the following steps:
(1) drying the iron tailing powder to ensure that the material presents dry powdery particles;
(2) weighing various materials according to the weight parts of 0-42 parts of iron tailing powder, 41-80 parts of slag micro powder, 9-28 parts of quicklime, 3-13 parts of desulfurized ash and 4-17 parts of gypsum for later use;
(3) adding the standby material into a container with good tightness, shaking and turning after sealing, standing for 15 minutes, and repeating the operation for 3-4 times;
(4) and (3) storing the composite gelled material which is well stood in a dry environment to obtain the composite gelled material.
2. The method for preparing the composite cementitious material by using iron tailings powder, slag micropowder and desulfurized ash according to claim 1, wherein the particle size of the iron tailings powder is below 80 μm, and the iron tailings powder is high-silicon type iron tailings powder.
3. The method for preparing the composite cementitious material by using iron tailings powder, slag micropowder and desulfurized ash according to claim 2, wherein the components of the iron tailings powder comprise SiO271.62％、Fe2O317.09％、MgO 3.42％、Al2O33.37％、CaO 2.65％、P2O50.623％、K2O 0.318％、Na2O 0.286％、MnO 0.275％、TiO20.172％。
4. The method for preparing the composite cementitious material by using iron tailings powder, slag micropowder and desulfurized ash according to claim 1, wherein the slag micropowder is granulated blast furnace slag and has a fineness modulus of 0.983.
5. The method for preparing the composite cementitious material by using iron tailings powder, superfine slag powder and desulfurized ash as claimed in claim 4, wherein the components of the superfine slag powder comprise CaO 38.06%, SiO235.06、Al2O317.12％、MgO6.20％、TiO21.07％、S 0.830％、NaO20.538％、K2O 0.363％、Fe2O30.332％、MnO0.186％。
6. The method for preparing the composite cementitious material by using iron tailings powder, slag micropowder and desulfurized ash according to claim 1, wherein the desulfurized ash is obtained by a gypsum wet desulphurization process.
7. The method for preparing the composite cementitious material by using iron tailings powder, slag micropowder and desulfurized fly ash according to claim 1, wherein the components of the desulfurized fly ash comprise CaO 55.41%, SO326.52％、SiO25.78％、Al2O33.91 percent of chlorine element, 3.45 percent of Na2O 1.33％、Fe2O31.32％、MgO 0.93％、TiO20.32 percent and 0.3 percent of iodine element.
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| CN202010027312.7A CN111196688A (en) | 2020-01-10 | 2020-01-10 | Method for preparing composite cementing material by using iron tailing powder, slag micro powder and desulfurized ash |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111704374A (en) * | 2020-06-09 | 2020-09-25 | 河北工程大学 | Composite tailing cementing material and preparation method and application thereof |
| CN112608048A (en) * | 2020-12-18 | 2021-04-06 | 张建华 | Metal tailing cementing material and preparation method and application thereof |
| CN113060959A (en) * | 2021-04-09 | 2021-07-02 | 北京科技大学 | Preparation method and application of high-sulfur metal tailing micro-powder composite admixture for concrete |
| CN114105502A (en) * | 2021-11-26 | 2022-03-01 | 北京科技大学 | Cementing material, historic building repair mortar and preparation method thereof |
| CN115259732A (en) * | 2021-04-30 | 2022-11-01 | 广东清大同科环保技术有限公司 | Building material prepared from tailings |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111704374A (en) * | 2020-06-09 | 2020-09-25 | 河北工程大学 | Composite tailing cementing material and preparation method and application thereof |
| CN112608048A (en) * | 2020-12-18 | 2021-04-06 | 张建华 | Metal tailing cementing material and preparation method and application thereof |
| CN113060959A (en) * | 2021-04-09 | 2021-07-02 | 北京科技大学 | Preparation method and application of high-sulfur metal tailing micro-powder composite admixture for concrete |
| CN115259732A (en) * | 2021-04-30 | 2022-11-01 | 广东清大同科环保技术有限公司 | Building material prepared from tailings |
| CN115259732B (en) * | 2021-04-30 | 2024-02-06 | 广东清大同科环保技术有限公司 | Building material prepared from tailings |
| CN114105502A (en) * | 2021-11-26 | 2022-03-01 | 北京科技大学 | Cementing material, historic building repair mortar and preparation method thereof |
| CN114105502B (en) * | 2021-11-26 | 2022-12-20 | 北京科技大学 | Cementing material, historic building repair mortar and preparation method thereof |
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