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Mineral microorganism cemented filling material capable of mineralizing and sealing CO2 and preparation method for mineral microorganism cemented filling material

A technology of microbial glue and filling materials, which is applied in the field of mine filling materials and microorganisms, can solve problems such as high energy consumption and high carbon emissions, and achieve the effects of reducing carbon emissions, reducing CO2 emissions, and reducing costs

Active Publication Date: 2020-11-24
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The application of filling mining technology was originally intended to solve the environmental problems brought about by mining, but the extensive application of traditional cement-based cemented filling materials has brought about problems such as high carbon emissions and high energy consumption caused by cement.

Method used

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  • Mineral microorganism cemented filling material capable of mineralizing and sealing CO2 and preparation method for mineral microorganism cemented filling material
  • Mineral microorganism cemented filling material capable of mineralizing and sealing CO2 and preparation method for mineral microorganism cemented filling material
  • Mineral microorganism cemented filling material capable of mineralizing and sealing CO2 and preparation method for mineral microorganism cemented filling material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] In this example, the mineralized and stored CO is prepared by the mixing method. 2 Microbial cemented filling materials for mines, such as figure 2 As shown, the specific steps are as follows:

[0045] (1) Inoculate the CA bacterium producing carbonic anhydrase in the culture medium, cultivate it in the incubator 7 for 18 hours at 25°C to obtain the seed solution 8, and then expand the culture to form the bacterium solution 10; and prepare a concentration of 2mol / L of calcium source solution 12;

[0046] (2) choose gangue as coarse aggregate 1, and select fly ash as fine aggregate 5; wherein, the mass ratio of fine aggregate to coarse aggregate is 3:2; coarse aggregate 1 is transported to the crusher through belt conveyor 2 3. Crushing until the particle size is less than or equal to 25mm, and then transported to the mixer 6 by the belt conveyor 4;

[0047] (3) Pass CO into the bacterial solution 2 Gas 9, formed containing CO 3 2- Bacteria solution 11; among the...

Embodiment 2

[0051] In this example, the mineralized and stored CO is prepared by the mixing method. 2 Microbial cemented filling materials for mines, such as figure 2 As shown, the specific steps are as follows:

[0052] (1) Inoculate the CA bacterium producing carbonic anhydrase in the medium, cultivate it in the incubator 7 for 12 hours at 37° C. to obtain the seed liquid 8, and then expand the culture to form the bacterial liquid 10; and prepare a concentration of 0.5 mol Calcium source solution 12 / L;

[0053] (2) Select tailing sand as coarse aggregate 1, and select fly ash as fine aggregate 5; wherein, the mass ratio of fine aggregate to coarse aggregate is 1:1; The machine 3 crushes the particles until the particle size is ≤25mm, and then transports them to the mixer 6 through the belt conveyor 4;

[0054] (3) Pass CO into the bacterial solution 2 Gas 9, formed containing CO 3 2- Bacteria solution 11; among them, containing CO 3 2- The volume ratio of the bacteria liquid an...

Embodiment 3

[0058] In this example, the mineralized and stored CO is prepared by the mixing method. 2 Microbial cemented filling materials for mines, such as figure 2 As shown, the specific steps are as follows:

[0059] (1) Inoculate the CA bacterium producing carbonic anhydrase in the culture medium, cultivate it in the incubator 7 for 24 hours at 30°C to obtain the seed solution 8, then expand the culture to form the bacterium solution 10; and prepare a concentration of 1 mol / L of calcium source solution 12;

[0060] (2) Select the mixture of gangue, tailings and aeolian sand as coarse aggregate 1, and select fly ash as fine aggregate 5; wherein, the mass ratio of fine aggregate to coarse aggregate is 1:2; coarse aggregate 1. It is transported to the crusher 3 by the belt conveyor 2 for crushing until the particle size is ≤ 25mm, and then transported to the mixer 6 by the belt conveyor 4;

[0061] (3) Pass CO into the bacterial solution 2 Gas 9, formed containing CO 3 2- Bacter...

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Abstract

The invention discloses a mineral microorganism cemented filling material capable of mineralizing and sealing CO2 and a preparation method for the mineral microorganism cemented filling material. Themineral microorganism cemented filling material comprises the raw materials composed of CO2, microorganisms, a calcium source and aggregate, wherein the microorganisms are carbonic anhydrase bacteriacapable of producing carbonic anhydrase and can convert the CO2 into CO3<2-> which is then combined with the calcium source to form a calcium carbonate gel; and the aggregate is cemented by the calcium carbonate gel to form a cemented filling material. According to the invention, the mineral microorganism cemented filling material capable of mineralizing and sealing the CO2 can simultaneously realize sealing of the CO2 and consolidation of a filling material; and compared with a traditional cement-based cemented filling material, the mineral microorganism cemented filling material capable of mineralizing and sealing the CO2 has the following advantages: the greenhouse effect is relieved; the carbon emission is reduced; the CO2 is sealed and stored; meanwhile, the performance of a filling body is guaranteed to meet the technical requirements of mine filling and mining. The filling material disclosed by the invention is a novel environmentally-friendly, low-energy-consumption and low-emission cemented filling material, and has wide application field and popularization value.

Description

technical field [0001] The invention relates to a mine microbial cementing filling material for mineralization and sequestration of CO2 and a preparation method thereof, which belongs to the technical field of mine filling materials and microorganisms and is suitable for environment-friendly mine filling and mining. Background technique [0002] CO 2 As an important part of the atmosphere, it has a direct impact on the cycle of matter and energy in nature, the survival and development of organisms, human society and the living environment. At the same time CO 2 It is also affected by biological and human activities and gradually changes. CO 2 The sources are very extensive, fossil fuel combustion, animal and plant respiration, etc. will produce a large amount of CO 2 , can be attributed to two parts: natural sources and sources of human activities. of which CO 2 Natural sources account for 80% of the total sources, but they can maintain a balance in the carbon cycle an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00
CPCC04B28/005C04B2111/00724C04B2111/00767C04B2103/0001C04B22/10C04B18/12C04B18/08C04B22/124C04B22/085C04B24/04C04B14/068
Inventor 邓雪杰李玉刘浩冯建业赵逸乐袁宗萱
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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