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Method for preparing biobrick by using microorganisms to induce calcium carbonate precipitation and solidify rare earth tailing sand

A technology of rare earth tailings and bio-bricks, which is applied in the field of geotechnical engineering, can solve the problems of rare earth tailings sand storage, low strength of bio-bricks, and high production costs, and achieve the effects of short preparation period, fast reproduction, and convenient secondary utilization

Pending Publication Date: 2021-11-05
HEFEI UNIV OF TECH +1
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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing bio-bricks by microorganism-induced calcium carbonate precipitation and solidification of rare earth tailings sand, so as to solve the storage problem of rare earth tailings sand, and the problems of low strength, high production cost and serious pollution of bio-bricks in the prior art

Method used

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  • Method for preparing biobrick by using microorganisms to induce calcium carbonate precipitation and solidify rare earth tailing sand
  • Method for preparing biobrick by using microorganisms to induce calcium carbonate precipitation and solidify rare earth tailing sand
  • Method for preparing biobrick by using microorganisms to induce calcium carbonate precipitation and solidify rare earth tailing sand

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Embodiment Construction

[0038] The method of the present invention will be further described below in conjunction with the examples.

[0039] figure 1 It is a flow chart of the method of the present invention, as can be seen from this figure, in the present embodiment, the steps of the method for preparing bio-bricks by microorganisms inducing calcium carbonate precipitation and solidifying rare earth tailings sand are as follows:

[0040] Step 1, treatment of rare earth tailings

[0041] Place the rare earth tailings sand in a clean tray, and then place the tray in an oven. The temperature of the oven is set at 85°C to 100°C, and the drying time is 24h to 48h.

[0042] The dried rare earth tailings are crushed with a stone crushing machine and passed through a soil sieve with a particle size of 1mm.

[0043] The rare earth tailings sand after the above treatment is recorded as rare earth tailings dry sand.

[0044] Step 2, preparation of solidification solution

[0045] Step 2.1, preparation of ...

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Abstract

The invention discloses a method for preparing a biobrick by using microorganisms to induce calcium carbonate precipitation and solidify rare earth tailing sand, and belongs to the field of geotechnical engineering. The method comprises the following steps: treating the rare earth tailing sand; the preparation of the curing liquid comprises preparation of a bacterial liquid and a cementing liquid; and manufacturing the biobrick. The biobrick is manufactured in a slurry mixing and demolding mode, the process is simple, the cost is low, the manufacturing process is green and free of pollution, the prepared biobrick can meet the requirement for temporary storage of the rare earth tailing sand, the environmental problem caused by accumulation of the rare earth tailing sand is solved, and a foundation is laid for secondary recycling of the rare earth tailing sand.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering, and relates to a method for preparing bio-bricks by using microorganisms to induce calcium carbonate to precipitate and solidify rare-earth tailing sands, in particular to a method for storing rare-earth tailings sands by using bacteria to prepare bio-bricks. Background technique [0002] As an important metal mineral resource, rare earth has a low comprehensive utilization rate in my country. Since its mining, a large amount of rare earth tailings has been accumulated. The utilization of rare earth tailings in my country includes two aspects. One is to improve the level of rare earth tailings at the technical level. Second, it is consistent with the international mainstream, using rare earth tailings to develop new building materials. Rare earth tailings are waste after the beneficiation process, which contains a large amount of heavy metals and other pollutants. Long-term stacke...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/12
CPCC04B28/00C04B18/12C04B2201/50C04B2103/0001C04B22/124C04B24/126Y02W30/91
Inventor 康博杨志龙查甫生许龙武明辉周阳
Owner HEFEI UNIV OF TECH
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