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Sulfide ore flame retardant method based on microorganism-inhibitor comprehensive effect

A technology of comprehensive action and chemical inhibitor, applied in mining equipment, earth-moving mining, dust prevention, etc., can solve the problems of ore partition inside sulfide ore pile, increase operating cost, short duration, etc. The effect of preventing and controlling the spontaneous combustion of sulfide ore and reducing the tendency of spontaneous combustion

Active Publication Date: 2022-04-01
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are obvious disadvantages in preventing spontaneous combustion in this way: 1. The inhibitor is sprayed unevenly on the surface of the ore heap; 2. It cannot completely penetrate into the inside of the ore heap, and the ore inside the ore heap cannot be effectively cut off, and the effect is not significant; 3. , Due to the physical and chemical properties of the configured reagents, the spraying equipment will be corroded, which will increase the operating cost
[0005] In the existing prevention and control technology of sulfide ore spontaneous combustion, most of them only deal with sulfide ore unilaterally, and the problem of preventing spontaneous combustion is generally not ideal. In the past, the measures to suppress the spontaneous combustion of sulfide ore mainly focused on the control of external factors, that is, to prevent the spontaneous combustion of sulfide ore by grouting, injecting inert gas, and spraying inhibitors, etc., but these methods cannot effectively isolate the ore inside the sulfide ore pile. And the duration is short, and the problem of spontaneous combustion of sulfide ore has not been solved from internal factors

Method used

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  • Sulfide ore flame retardant method based on microorganism-inhibitor comprehensive effect
  • Sulfide ore flame retardant method based on microorganism-inhibitor comprehensive effect
  • Sulfide ore flame retardant method based on microorganism-inhibitor comprehensive effect

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Experimental program
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Effect test

Embodiment 1

[0028] This embodiment includes the following steps:

[0029] Step 1. Cultivate acidophilic thermophilic Thiobacillus to obtain cultured bacterial liquid; the cultivation process is: use sterilized 9K medium to inoculate acidophilic Thermophilic Thiobacillus, and use elemental sulfur as the nutrient substance of bacteria , sealed after inoculation, and then put into a rotating speed of 175rpm, and the temperature was cultivated for 6 days in a constant temperature shaker at 43°C; the medium was Silverman's liquid medium; ), from the laboratory of the School of Resource Processing and Bioengineering, Central South University; address: School of Resource Processing and Bioengineering, No. 932, Lushan South Road, Yuelu District, Changsha City, Hunan Province;

[0030] Step 2, mix the sulfide ore and the cultured bacterial solution obtained in step 1 and then add the immersion aid to obtain the mixture, then put the obtained mixture into a sealed container and carry out desulfuriz...

Embodiment 2

[0066] This embodiment includes the following steps:

[0067] Step 1. Cultivate acidophilic thermophilic Thiobacillus to obtain cultured bacterial liquid; the cultivation process is: use sterilized 9K medium to inoculate acidophilic Thermophilic Thiobacillus, and use elemental sulfur as the nutrient substance of bacteria , sealed after inoculation, and then put into a rotating speed of 170rpm, and the temperature was cultivated in a constant temperature shaker at 40°C for 8 days; the medium was Silverman's liquid medium; ), from the laboratory of the School of Resource Processing and Bioengineering, Central South University; address: School of Resource Processing and Bioengineering, No. 932, Lushan South Road, Yuelu District, Changsha City, Hunan Province;

[0068] Step 2, mix the sulfide ore and the cultured bacterial solution obtained in step 1 and then add the immersion aid to obtain the mixture, then put the obtained mixture into a sealed container and carry out desulfuriz...

Embodiment 3

[0074] This embodiment includes the following steps:

[0075] Step 1. Cultivate acidophilic thermophilic Thiobacillus to obtain cultured bacterial liquid; the cultivation process is: use sterilized 9K medium to inoculate acidophilic Thermophilic Thiobacillus, and use elemental sulfur as the nutrient substance of bacteria , sealed after inoculation, and then put into a rotating speed of 173rpm, and the temperature was cultivated for 4 days in a constant temperature shaker at 45°C; the medium was Silverman's liquid medium; the Acidithiobacillus caldus ), from the laboratory of the School of Resource Processing and Bioengineering, Central South University; address: School of Resource Processing and Bioengineering, No. 932, Lushan South Road, Yuelu District, Changsha City, Hunan Province;

[0076] Step 2, mix the sulfide ore and the cultured bacterial solution obtained in step 1 and then add the immersion aid to obtain the mixture, then put the obtained mixture into a sealed conta...

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Abstract

The invention discloses a sulfide ore flame-retardant method based on a microorganism-inhibitor comprehensive effect. The sulfide ore flame-retardant method comprises the following steps: 1, culturing acidophilic Acidithiobacillus caldus; 2, mixing the sulfide ore and the cultured bacterial liquid, adding a leaching aid, putting the mixture into a sealed container, and carrying out desulfurization treatment in a shaking table; 3, mixing a foaming agent, a foam stabilizer and a stopping agent to obtain a foam stopping agent; and 4, mixing the desulfurized sulfide ore with a foam inhibitor, and carrying out flame retardance on the sulfide ore. The sulfur content on the surface of the sulfide ore is reduced through the microbial action, surface oxidation of the sulfide ore and heat accumulation caused by oxidation heat release are reduced, so that the spontaneous combustion tendency of the sulfide ore is reduced, the sulfide ore is covered with the foam stopping agent, generated foam tightly covers the surface of the sulfide ore, and the spontaneous combustion tendency of the sulfide ore is reduced. Oxygen is isolated to interrupt the spontaneous combustion process, the spontaneous combustion tendency of the sulfide ore is reduced, and the sulfide ore spontaneous combustion prevention purpose under the comprehensive action of internal and external factors is achieved.

Description

technical field [0001] The invention belongs to the technical field of sulfide ore flame retardancy, and in particular relates to a flame retardant method of sulfide ore based on the comprehensive action of microorganisms and inhibitors. Background technique [0002] With the rapid development of the economy, the demand for mineral resources is increasing day by day. Since there are fewer and fewer resources buried in shallow areas, it is an inevitable trend to develop resources in deep areas. The high temperature generated by deep mining will lead to spontaneous combustion of high-sulfur ores. Spontaneous combustion of sulfide ore is an important safety hazard in the process of ore mining, which will cause a series of safety and environmental problems, and cause heavy economic losses. First of all, the toxic gas and high temperature produced by the spontaneous combustion of ore will affect the health and life safety of workers, cause damage to equipment and facilities, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F5/08C04B41/00C04B41/50C09K21/10A62C3/06A62C5/02
Inventor 潘伟廖志刚徐刚易汝格杨羚蓉徐宇向义龚维立
Owner CENT SOUTH UNIV
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