CN112062592A - Red mud foam mortar and preparation method thereof - Google Patents
Red mud foam mortar and preparation method thereof Download PDFInfo
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- CN112062592A CN112062592A CN202010841463.6A CN202010841463A CN112062592A CN 112062592 A CN112062592 A CN 112062592A CN 202010841463 A CN202010841463 A CN 202010841463A CN 112062592 A CN112062592 A CN 112062592A
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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
- C04B28/24—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 alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
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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
- C04B2111/40—Porous or lightweight materials
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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
- 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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- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
- Processing Of Solid Wastes (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention discloses red mud foam mortar and a preparation method thereof. The red mud foam mortar comprises a cementing material and foam liquid; the components of the cementing material comprise Bayer process active red mud powder, fly ash, cement and an excitant; wherein the Bayer process active red mud powder is obtained by calcining Bayer process red mud. The invention provides a method for preparing foam mortar by activating and exciting calcined Bayer process red mud, and provides a feasible solution for applying Bayer process red mud in a large quantity. The Bayer process red mud foam mortar prepared by the method has good performance, can recycle the stacked Bayer process red mud, achieves the aim of protecting the environment, can reduce the engineering cost, and has wide application prospect.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to red mud foam mortar and a preparation method thereof.
Background
Red mud is an industrial solid waste generated after extracting alumina from bauxite. 0.6-2.0 tons of red mud are generated per 1 ton of alumina, and the total amount of red mud is 7000 ten thousand tons per year in the whole world. At present, the main treatment mode of red mud is damming and piling, and direct sea filling or sea filling after neutralization. Because of high alkalinity and large production amount of the red mud, the traditional treatment mode can cause serious pollution to surrounding water, atmosphere and soil.
According to different alumina production processes, red mud is divided into sintering process red mud and Bayer process red mud (the properties of the jointly produced red mud are similar to those of the sintering process red mud). Because of the high-temperature sintering process, the red mud of the sintering method usually contains 2 CaO. SiO2And the like, so that extensive research has been carried out at home and abroad in the aspect of producing building materials such as cement, baking-free bricks and the like by using the red mud produced by the sintering method, and certain results have been obtained. However, there are few studies reported on the treatment of bayer process red mud. How to effectively utilize Bayer process red mud as resources becomes a subject of attention of research workers in the industry.
Disclosure of Invention
In order to overcome the problems of the prior art, the invention aims at providing the red mud foam mortar, the invention aims at providing the preparation method of the red mud foam mortar, and the invention aims at providing the application of the red mud foam mortar.
The present invention is based on the following recognition and findings of the inventors: bayer process red mud containing hematite (alpha-Fe)3O2) And goethite (alpha-FeO (OH)), diaspore (Al)2O3·H2O), hydrous sodium aluminosilicate (Na)2O·Al2O3·1.68SiO2·1.73H2O), calcite (CaCO)3) The red mud has a porous structure, a large surface area and strong alkalinity, and can generate beta-2 CaO & SiO through sintering2And the like, and provides a feasible scheme for preparing the red mud foam mortar.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the embodiment of the first aspect of the invention provides red mud foam mortar, which comprises a cementing material and foam liquid; the components of the cementing material comprise Bayer process active red mud powder, fly ash, cement and an excitant; the Bayer process active red mud powder is obtained by calcining Bayer process red mud.
Preferably, in the red mud foam mortar, the cementing material comprises the following components in parts by mass: 45-60 parts of Bayer process activated red mud powder, 12-23 parts of fly ash, 8-15 parts of cement and 15-25 parts of excitant.
Preferably, in the cementing material of the red mud foam mortar, Bayer process active red mud powder is obtained by calcining Bayer process red mud at 700-900 ℃; more preferably, the Bayer process activated red mud powder is obtained by calcining Bayer process red mud at 700-900 ℃ for 2-18 hours. The calcination treatment can change the structure of aluminosilicate minerals in the red mud, wherein a large number of Si-O bonds and Al-O bonds are broken, a large number of active particles are generated, and finally, beta-2 CaO. SiO is generated2And the like.
Preferably, in the cementing material of the red mud foam mortar, the bayer process red mud (before calcination) comprises the following components in percentage by mass: 10-13% SiO2，19～22％Al2O3，38～42％Fe2O3，2～4.5％CaO，0.1～2％MgO，3～8％TiO2，5～8％Na2O; further preferably, the bayer process red mud comprises the following components in percentage by mass: 11 to 12% SiO2，20～21％Al2O3，39～40％Fe2O3，2～3％CaO，0.2～0.4％MgO，6.5～7.5％TiO2，6～7％Na2O。
Preferably, in the cementing material of the red mud foam mortar, the caustic soda content of Bayer process red mud (before calcination) is 15-25%; more preferably, the caustic soda content of the Bayer process red mud is 15-17%.
Preferably, in the cementing material of the red mud foam mortar, the particle size of active red mud powder of the Bayer process is 100-200 meshes.
Preferably, in the cementing material of the red mud foam mortar, the excitant is selected from one or the combination of water glass and mirabilite; further preferably, the excitant is water glass and mirabilite. The selected water glass is industrial solid water glass.
In some embodiments of the present invention, the cementitious material of the red mud foam mortar comprises the following components in parts by mass: 45-60 parts of Bayer process activated red mud powder, 12-23 parts of fly ash, 8-15 parts of cement, 10-15 parts of water glass and 5-10 parts of mirabilite.
Preferably, in the cementing material of the red mud foam mortar, the cement is ordinary portland cement.
Preferably, in the red mud foam mortar, the foam liquid comprises the following components: hydrogen peroxide, sodium dodecyl sulfate, calcium stearate, 1, 2-dichloroethane and water.
Preferably, in the foam liquid of the red mud foam mortar, the mass ratio of hydrogen peroxide, sodium dodecyl sulfate, calcium stearate, 1, 2-dichloroethane and water is (4-6): (1-2): (1-2): (0.5-1.5): 100.
preferably, in the foam liquid of the red mud foam mortar, H of hydrogen peroxide2O2The concentration is 25 wt% -30 wt%; further preferably, H of hydrogen peroxide2O2The concentration is 27 wt% -28 wt%.
Preferably, in the red mud foam mortar, the volume ratio of the cementing material to the foam liquid is (3-5): 10; further preferably, the volume ratio of the cementing material to the foam concentrate is (3.5-4.5): 10.
the embodiment of the second aspect of the invention provides a preparation method of the red mud foam mortar of the embodiment of the first aspect.
The preparation method of the red mud foam mortar comprises the following steps:
1) calcining the Bayer process red mud, and crushing to obtain Bayer process active red mud powder;
2) mixing Bayer process active red mud powder, fly ash, cement and an exciting agent to obtain a cementing material;
3) and mixing and stirring the cementing material and the foam liquid, and foaming to obtain the red mud foam mortar.
Preferably, in the step 1) of the preparation method of the red mud foam mortar, the calcining temperature is 700-900 ℃.
Preferably, in step 1) of the preparation method of the red mud foam mortar, the calcination time is 12 to 18 hours.
Preferably, in the step 1) of the preparation method of the red mud foam mortar, the crushing mode is ball milling.
Preferably, in step 3), the preparation method of the red mud foam mortar comprises the following steps: mixing hydrogen peroxide, sodium dodecyl sulfate, calcium stearate, 1, 2-dichloroethane and water to obtain the foam liquid.
The third aspect embodiment of the invention provides an application of the red mud foam mortar of the first aspect embodiment.
The red mud foam mortar is applied to mine filling, foundation pit filling or vertical roadbed.
The invention has the beneficial effects that:
the invention provides a method for preparing foam mortar by activating and exciting calcined Bayer process red mud, and provides a feasible solution for applying Bayer process red mud in a large quantity. The Bayer process red mud foam mortar prepared by the method has good performance, can recycle the stacked Bayer process red mud, achieves the aim of protecting the environment, can reduce the engineering cost, and has wide application prospect.
Detailed Description
The present invention will be described in further detail with reference to specific examples. The starting materials, reagents or apparatus used in the examples and comparative examples were obtained from conventional commercial sources or can be obtained by a method of the prior art, unless otherwise specified. Unless otherwise indicated, the testing or testing methods are conventional in the art.
The bayer process red mud raw material (before calcination) used in the following examples and comparative examples had the following chemical composition in mass percent: 11.31% SiO2，20.67％Al2O3，39.21％Fe2O3，2.70％CaO，0.30％MgO，7.30％TiO2，6.77％Na2O; the caustic content was 16.80%.
Example 1
The preparation method of the red mud foam mortar comprises the following steps:
1) calcination pretreatment of Bayer process red mud
The Bayer process red mud is put into a rotary calcining furnace and calcined for 15 hours at the temperature of 800 ℃.
2) Preparation of red mud powder by Bayer process
And naturally cooling the calcined red mud in the air to room temperature, and then sending the red mud into a planetary ball mill for ball milling to obtain the Bayer process activated red mud powder with the particle size of 100-200 meshes.
3) Preparation of cementitious Material
The Bayer process red mud active powder, the fly ash, the water glass, the cement and the mirabilite are respectively weighed according to the proportion in the table 1 and added into a V-shaped mixer, the mixer is started to rotate forwards for 15min and then rotate backwards for 15min, so that the raw materials are fully and uniformly mixed, and the cementing material powder is obtained.
Table 1 example 1 cementitious material composition
| Raw materials | Mass portion of |
| Bayer process active red mud powder | 45 |
| Fly ash | 20 |
| Water glass | 10 |
| P.O cement | 15 |
| Natrii sulfas | 10 |
4) Preparation of the foam solution
Weighing a proper amount of water, adding the water into a 1-ton vertical liquid heating stirrer, heating the water to 40 +/-5 ℃, and then adding 27.5 wt% of hydrogen peroxide, sodium dodecyl sulfate, calcium stearate and 1, 2-dichloroethane. Wherein, the dosage of the hydrogen peroxide accounts for 5 percent of the mass of the water, the dosage of the sodium dodecyl sulfate accounts for 1.5 percent of the mass of the water, the dosage of the calcium stearate accounts for 1.5 percent of the mass of the water, and the dosage of the 1, 2-dichloroethane accounts for 1 percent of the mass of the water. Starting the heat preservation function, stirring for 1h to fully dissolve and homogenize the materials.
5) Preparation of foamed mortar
Mixing the gelled material powder obtained in the step 3) with the foam liquid obtained in the step 4) according to a volume ratio of 4: 10 are respectively added into a planetary closed stirrer, the stirrer is started and stirred for 30min, so that the red mud foam mortar is obtained.
Example 2
The preparation method of the red mud foam mortar comprises the following steps:
1) calcination pretreatment of Bayer process red mud
The Bayer process red mud is put into a rotary calcining furnace and calcined for 13.5 hours at the temperature of 855 ℃.
2) Preparation of red mud powder by Bayer process
And naturally cooling the calcined red mud in the air to room temperature, and then sending the red mud into a planetary ball mill for ball milling to obtain the Bayer process activated red mud powder with the particle size of 100-200 meshes.
3) Preparation of cementitious Material
The Bayer process red mud active powder, the fly ash, the water glass, the cement and the mirabilite are respectively weighed according to the proportion shown in the table 2 and added into a V-shaped mixer, the mixer is started to rotate forwards for 15min and then rotate backwards for 15min, so that the raw materials are fully and uniformly mixed, and the cementing material powder is obtained.
Table 2 example 2 cementitious composition
4) Preparation of the foam solution
Weighing a proper amount of water, adding the water into a 1-ton vertical liquid heating stirrer, heating the water to 40 +/-5 ℃, and then adding 27.5 wt% of hydrogen peroxide, sodium dodecyl sulfate, calcium stearate and 1, 2-dichloroethane. Wherein, the dosage of the hydrogen peroxide accounts for 5 percent of the mass of the water, the dosage of the sodium dodecyl sulfate accounts for 1.5 percent of the mass of the water, the dosage of the calcium stearate accounts for 1.5 percent of the mass of the water, and the dosage of the 1, 2-dichloroethane accounts for 1 percent of the mass of the water. Starting the heat preservation function, stirring for 1h to fully dissolve and homogenize the materials.
5) Preparation of foamed mortar
Mixing the gelled material powder obtained in the step 3) with the foam liquid obtained in the step 4) according to a volume ratio of 4: 10 are respectively added into a planetary closed stirrer, the stirrer is started and stirred for 30min, so that the red mud foam mortar is obtained.
Example 3
The preparation method of the red mud foam mortar comprises the following steps:
1) calcination pretreatment of Bayer process red mud
The Bayer process red mud is put into a rotary calcining furnace and calcined for 16 hours at the temperature of 900 ℃.
2) Preparation of red mud powder by Bayer process
And naturally cooling the calcined red mud in the air to room temperature, and then sending the red mud into a planetary ball mill for ball milling to obtain the Bayer process activated red mud powder with the particle size of 100-200 meshes.
3) Preparation of cementitious Material
The Bayer process red mud active powder, the fly ash, the water glass, the cement and the mirabilite are respectively weighed according to the proportion shown in the table 3 and added into a V-shaped mixer, the mixer is started to rotate forwards for 15min and then rotate backwards for 15min, so that the raw materials are fully and uniformly mixed, and the cementing material powder is obtained.
Table 3 example 3 cementitious composition
| Raw materials | Mass portion of |
| Bayer process active red mud powder | 57 |
| Fly ash | 18 |
| Water glass | 12 |
| P.O cement | 8 |
| Natrii sulfas | 5 |
4) Preparation of the foam solution
Weighing a proper amount of water, adding the water into a 1-ton vertical liquid heating stirrer, heating the water to 40 +/-5 ℃, and then adding 27.5 wt% of hydrogen peroxide, sodium dodecyl sulfate, calcium stearate and 1, 2-dichloroethane. Wherein, the dosage of the hydrogen peroxide accounts for 5 percent of the mass of the water, the dosage of the sodium dodecyl sulfate accounts for 1.5 percent of the mass of the water, the dosage of the calcium stearate accounts for 1.5 percent of the mass of the water, and the dosage of the 1, 2-dichloroethane accounts for 1 percent of the mass of the water. Starting the heat preservation function, stirring for 1h to fully dissolve and homogenize the materials.
5) Preparation of foamed mortar
Mixing the gelled material powder obtained in the step 3) with the foam liquid obtained in the step 4) according to a volume ratio of 4: 10 are respectively added into a planetary closed stirrer, the stirrer is started and stirred for 30min, so that the red mud foam mortar is obtained.
Example 4
The preparation method of the red mud foam mortar comprises the following steps:
1) calcination pretreatment of Bayer process red mud
The Bayer process red mud is put into a rotary calcining furnace and calcined for 13 hours at the temperature of 780 ℃.
2) Preparation of red mud powder by Bayer process
And naturally cooling the calcined red mud in the air to room temperature, and then sending the red mud into a planetary ball mill for ball milling to obtain the Bayer process activated red mud powder with the particle size of 100-200 meshes.
3) Preparation of cementitious Material
The Bayer process red mud active powder, the fly ash, the water glass, the cement and the mirabilite are respectively weighed according to the proportion shown in the table 4 and added into a V-shaped mixer, the mixer is started to rotate forwards for 15min and then rotate backwards for 15min, so that the raw materials are fully and uniformly mixed, and the cementing material powder is obtained.
Table 4 example 4 cementitious composition
| Raw materials | Mass portion of |
| Bayer process active red mud powder | 60 |
| Fly ash | 12 |
| Water glass | 10 |
| P.O cement | 12 |
| Natrii sulfas | 6 |
4) Preparation of the foam solution
Weighing a proper amount of water, adding the water into a 1-ton vertical liquid heating stirrer, heating the water to 40 +/-5 ℃, and then adding 27.5 wt% of hydrogen peroxide, sodium dodecyl sulfate, calcium stearate and 1, 2-dichloroethane. Wherein, the dosage of the hydrogen peroxide accounts for 5 percent of the mass of the water, the dosage of the sodium dodecyl sulfate accounts for 1.5 percent of the mass of the water, the dosage of the calcium stearate accounts for 1.5 percent of the mass of the water, and the dosage of the 1, 2-dichloroethane accounts for 1 percent of the mass of the water. Starting the heat preservation function, stirring for 1h to fully dissolve and homogenize the materials.
5) Preparation of foamed mortar
Mixing the gelled material powder obtained in the step 3) with the foam liquid obtained in the step 4) according to a volume ratio of 4: 10 are respectively added into a planetary closed stirrer, the stirrer is started and stirred for 30min, so that the red mud foam mortar is obtained.
Example 5
The preparation method of the red mud foam mortar comprises the following steps:
1) calcination pretreatment of Bayer process red mud
The Bayer process red mud is put into a rotary calcining furnace and calcined for 17 hours at the temperature of 750 ℃.
2) Preparation of red mud powder by Bayer process
And naturally cooling the calcined red mud in the air to room temperature, and then sending the red mud into a planetary ball mill for ball milling to obtain the Bayer process activated red mud powder with the particle size of 100-200 meshes.
3) Preparation of cementitious Material
The Bayer process red mud active powder, the fly ash, the water glass, the cement and the mirabilite are respectively weighed according to the proportion shown in the table 4 and added into a V-shaped mixer, the mixer is started to rotate forwards for 15min and then rotate backwards for 15min, so that the raw materials are fully and uniformly mixed, and the cementing material powder is obtained.
Table 5 example 5 cementitious composition
| Raw materials | Mass portion of |
| Bayer process active red mud powder | 49 |
| Fly ash | 15 |
| Water glass | 15 |
| P.O cement | 11 |
| Natrii sulfas | 10 |
4) Preparation of the foam solution
Weighing a proper amount of water, adding the water into a 1-ton vertical liquid heating stirrer, heating the water to 40 +/-5 ℃, and then adding 27.5 wt% of hydrogen peroxide, sodium dodecyl sulfate, calcium stearate and 1, 2-dichloroethane. Wherein, the dosage of the hydrogen peroxide accounts for 5 percent of the mass of the water, the dosage of the sodium dodecyl sulfate accounts for 1.5 percent of the mass of the water, the dosage of the calcium stearate accounts for 1.5 percent of the mass of the water, and the dosage of the 1, 2-dichloroethane accounts for 1 percent of the mass of the water. Starting the heat preservation function, stirring for 1h to fully dissolve and homogenize the materials.
5) Preparation of foamed mortar
Mixing the gelled material powder obtained in the step 3) with the foam liquid obtained in the step 4) according to a volume ratio of 4: 10 are respectively added into a planetary closed stirrer, the stirrer is started and stirred for 30min, so that the red mud foam mortar is obtained.
Comparative example 1
The difference between this example and example 1 is that the bayer process red mud is not subjected to calcination pretreatment, but is directly dried in the sun to prepare the powder of step 2), and the rest of the raw material components and the preparation method are the same as those of example 1.
Comparative example 2
The difference between this example and example 4 is that the bayer process red mud is not subjected to calcination pretreatment, but is directly dried in the sun for the powder preparation of step 2), and the rest of the raw material components and the preparation method are the same as those of example 4.
Performance testing
The red mud foam mortar prepared in the examples 1 to 5 and the comparative examples 1 to 2 is prepared into a standard test mould according to GB/T17671-1999 Cement mortar Strength inspection method, maintenance is carried out under standard conditions, and then the flexural strength and compressive strength of each sample mortar are tested. The strength test is carried out by adopting a BC-300D computer constant stress pressure tester and a KZJ-500 electric bending tester. The specific test results are shown in table 6 below.
TABLE 6 Red mud foam mortar test results
From the test results in table 6, the compressive strength of the bayer process red mud foam mortar provided by the invention is greater than 0.7MPa in 3 days, most of the strengths in 7 days are greater than 2MPa, and the strengths in 28 days are greater than 4.0 MPa. The Bayer process red mud of the comparative examples 1-2 is not subjected to calcination pretreatment, and the strength performance of the prepared mortar is inferior to that of the samples of the examples.
The Bayer process red mud foam mortar provided by the invention can be applied to large-scale use scenes with low requirements on strength, such as large-scale projects of mine filling, foundation pit filling, vertical roadbeds and the like. The red mud foam mortar can be used for using a large amount of piled Bayer process red mud, thereby not only achieving the purpose of environmental protection, but also reducing the engineering cost.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. The red mud foam mortar is characterized in that: comprises a gelled material and foam liquid; the components of the cementing material comprise Bayer process active red mud powder, fly ash, cement and an excitant; the Bayer process active red mud powder is obtained by calcining Bayer process red mud.
2. The red mud foam mortar of claim 1, which is characterized in that: the cementing material comprises the following components in parts by mass: 45-60 parts of Bayer process activated red mud powder, 12-23 parts of fly ash, 8-15 parts of cement and 15-25 parts of excitant.
3. The red mud foam mortar according to claim 1 or 2, characterized in that: the Bayer process active red mud powder is obtained by calcining Bayer process red mud at 700-900 ℃.
4. The red mud foam mortar of claim 3, which is characterized in that: the particle size of the active red mud powder of the Bayer process is 100-200 meshes.
5. The red mud foam mortar according to claim 1 or 2, characterized in that: the excitant is selected from one or the combination of water glass and mirabilite.
6. The red mud foam mortar of claim 1, which is characterized in that: the foam liquid comprises the following components: hydrogen peroxide, sodium dodecyl sulfate, calcium stearate, 1, 2-dichloroethane and water.
7. The red mud foam mortar of claim 6, which is characterized in that: in the foam liquid, the mass ratio of hydrogen peroxide, sodium dodecyl sulfate, calcium stearate, 1, 2-dichloroethane and water is (4-6): (1-2): (1-2): (0.5-1.5): 100.
8. the red mud foam mortar of claim 1, which is characterized in that: the volume ratio of the cementing material to the foam liquid is (3-5): 10.
9. the method for preparing the red mud foam mortar of any one of claims 1 to 8, which is characterized by comprising the following steps: the method comprises the following steps:
1) calcining the Bayer process red mud, and crushing to obtain Bayer process active red mud powder;
2) mixing Bayer process active red mud powder, fly ash, cement and an exciting agent to obtain a cementing material;
3) and mixing and stirring the cementing material and the foam liquid, and foaming to obtain the red mud foam mortar.
10. Use of the red mud foam mortar of any one of claims 1 to 8 in mine filling, pit filling or vertical foundations.
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|---|---|---|---|---|
| AU6790190A (en) * | 1989-12-11 | 1991-06-13 | Alcan International Limited | Treatment of bayer process red mud slurries |
| CN101497533A (en) * | 2009-02-27 | 2009-08-05 | 中国科学院武汉岩土力学研究所 | Foam concrete and preparing process thereof |
| CN103467060A (en) * | 2013-09-11 | 2013-12-25 | 山东理工大学 | Bayer-process red mud foamed concrete blocking block and preparation method thereof |
| CN106747204A (en) * | 2016-12-12 | 2017-05-31 | 覃婷 | A kind of foam concrete block and preparation method thereof |
| CN110511056A (en) * | 2019-09-05 | 2019-11-29 | 许言言 | A kind of foam concrete block and preparation method thereof |
| CN110606721A (en) * | 2019-08-31 | 2019-12-24 | 武汉理工大学 | A kind of cementitious material based on various solid wastes and preparation method thereof |
-
2020
- 2020-08-20 CN CN202010841463.6A patent/CN112062592A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU6790190A (en) * | 1989-12-11 | 1991-06-13 | Alcan International Limited | Treatment of bayer process red mud slurries |
| CN101497533A (en) * | 2009-02-27 | 2009-08-05 | 中国科学院武汉岩土力学研究所 | Foam concrete and preparing process thereof |
| CN103467060A (en) * | 2013-09-11 | 2013-12-25 | 山东理工大学 | Bayer-process red mud foamed concrete blocking block and preparation method thereof |
| CN106747204A (en) * | 2016-12-12 | 2017-05-31 | 覃婷 | A kind of foam concrete block and preparation method thereof |
| CN110606721A (en) * | 2019-08-31 | 2019-12-24 | 武汉理工大学 | A kind of cementitious material based on various solid wastes and preparation method thereof |
| CN110511056A (en) * | 2019-09-05 | 2019-11-29 | 许言言 | A kind of foam concrete block and preparation method thereof |
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Application publication date: 20201211 |