Tailing sand biological prefabricated product and preparation method thereof

A kind of tailings and biological technology, applied in the field of microbiology and building materials, can solve the problems of destroying the soil environment, affecting stability, and causing great harm, and achieve the effects of clean environment, good mechanical strength, and low cost

Inactive Publication Date: 2012-10-10
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Accumulated over a long period of time, its volume continues to increase, and the stability of the tailings reservoir is greatly affected. It is necessary to maintain the tailings reservoir, and even rebuild the tailings reservoir to eliminate potential safety hazards, which requires high Otherwise, once a dam collapse accident occurs, the harm will be huge. Once it flows into the river, it will cause serious pollution, destroy the soil environment, cause environmental pollution, and even endanger people's lives. This will cause huge and serious damage. irreparable loss

Method used

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  • Tailing sand biological prefabricated product and preparation method thereof
  • Tailing sand biological prefabricated product and preparation method thereof
  • Tailing sand biological prefabricated product and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] (1) Weigh 5g of soybean protein, 15g of casein and 1000ml of distilled water to prepare a medium, adjust the pH to 7.0, sterilize and dry, inoculate the prepared medium with Bacillus Pasteurella, and shake it at 30°C Cultivate with an oscillation frequency of 170r / min, and cultivate for 24 hours;

[0031] (2) Configure the concentration of urea solution to be 2 mol L -1 , CaCl 2 The solution concentration is 2mol L -1 mixed solution;

[0032] (3) Put the untreated tailings into a 60ml disposable syringe in 3 times, tap the outside of the syringe during each filling process, so that the loaded sand can be packed tightly, and the sand column can be obtained by passing the test. The porosity is about 48.5%;

[0033] (4) Connect the bottom of the syringe with a peristaltic pump, inject the bacterial solution at a rate of 5ml / min, let it stand for 2 hours after filling, and inject the mixed solution at a rate of 15ml / min after the bacterial solution is completely seeped ...

Embodiment 2

[0036] (1) Weigh 7g of soybean protein, 18g of casein and 1000ml of distilled water to prepare a medium, adjust the pH to 8.0, sterilize and dry, inoculate the prepared medium with Bacillus pasteurianus, and shake at 30°C Cultivate with an oscillation frequency of 170r / min, and cultivate for 20h;

[0037] (2) Configure the concentration of urea solution to be 2 mol L -1 , CaCl 2 The solution concentration is 1.5mol L -1 mixed solution;

[0038] (3) Compact the untreated tailings into a self-made mold with a size of 240*115*53mm, so that the loaded sand can be packed tightly, and the porosity of the sand column can be found to be about 48.5% through testing;

[0039] (4) Connect the bottom of the syringe with a peristaltic pump, inject the bacterial solution at a rate of 10ml / min, and let it stand for 1 hour after it is filled. After the bacterial solution has completely seeped out, inject the mixed solution at a rate of 15ml / min. Leave it for 3 hours. After the mixed solutio...

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Abstract

The invention discloses a new method for solidification treatment of tailing sand accumulated in an ore field, in particular to a tailing sand biological prefabricated product and a preparation method thereof, and belongs to the cross scientific and technical field of microbiology and building materials. The method is characterized in that the cementing mechanism is realized by using microorganisms to induce the generation of calcium carbonate to conduct solidification treatment, so as compared with other using methods for the tailing sand, the method is environment-friendly and free of environmental pollution, and the calcium carbonate formed by microbial mineralization has the cementing property that cannot be obtained from chemical preparation. The prefabricated product comprises the following raw materials: the tailing sand from an iron ore field, bacillus pasteurii, casein, soy protein and anhydrous calcium chloride, which are shaped in a cementing mode according to a definite cementing process. The prefabricated product can be used for cementing prefabricated bricks as well as for the reinforcement of tailing sand ore dams. The new interdisciplinary method provided by the invention has the biggest characteristics of environment protection, no pollution, recycling of discarded tailing sand, and the like.

Description

technical field [0001] The invention relates to a method for treating tailing sand and turning waste into treasure, and in particular relates to the application of microbiology in the field of building materials. The tailing sand is used to make prefabricated products by using the microbial method. Background technique [0002] Tailings are "waste" discharged by mining enterprises under certain technical and economic conditions, but at the same time they are potential secondary resources. The tailings are stored in specially built tailings ponds, which is currently the most widely used by most concentrators. tailings treatment methods. Accumulated over time, its volume continues to increase, and the stability of the tailings reservoir is greatly affected. It is necessary to maintain the tailings reservoir, and even rebuild the tailings reservoir to eliminate potential safety hazards, which requires a high Otherwise, once a dam collapse accident occurs, the harm will be huge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/12
CPCY02W30/91
Inventor 钱春香李龙志荣辉
Owner SOUTHEAST UNIV
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