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Method of treating sulfide ore spontaneous combustion using bacteria leaching out method

An ore and leaching technology, which is applied in the field of spontaneous combustion and fire control of high-sulfur ore deposits, and bacterial leaching to control the spontaneous combustion of sulfide ores, can solve the problems of inability to cure sulfide ore fires and lack of technical means, and achieve low cost, short process flow, and little environmental pollution Effect

Inactive Publication Date: 2007-04-18
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

The traditional fire prevention technology mainly starts from the two factors of preventing oxygen and rapid heat dissipation, but lacks effective technical means for the key factor of the sulfur content of the ore itself, which makes it impossible to cure internal fires in sulfide mines.

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  • Method of treating sulfide ore spontaneous combustion using bacteria leaching out method
  • Method of treating sulfide ore spontaneous combustion using bacteria leaching out method

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Embodiment Construction

[0020] The ore body of a certain mine contains an average of 30% sulfur and has a tendency of spontaneous combustion. It needs to be combined with upward horizontal layered filling mining method for fire protection. In the ore body at the top of the stope, a roadway for distributing liquid along the veins is constructed, which is connected with the upper and middle level roadway. In the liquid distribution roadway, down-the-hole drills are used to drill several rows of fan-shaped deep holes with a diameter of 100 mm, a row spacing of 4 m, and a hole bottom distance of 6 m. During the upward recovery process, the liquid distribution drilling holes gradually disappear. In the liquid distribution system, the liquid distribution main pipe is a reinforced plastic pipe with a diameter of 100mm, and the liquid distribution branch pipe is an ordinary plastic pipe with a diameter of 15mm. The liquid distribution main pipe enters the liquid distribution roadway at the top of the stope t...

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Abstract

A method is disclosed to father self-ignition of pyrites by bacterium extraction, which belongs to the field of ore deposit fireproof. Acidic immersion liquiol with special thiophil bacteria is sprinkled in blasting pile by system of liquid distribution. With the interaction of bacteria and oxygen, oxidizable ore on the surface of ore particles is changed from solid phase to liquid phase. Temperature of blasting pile is lowered below critical temperature of ore self-ignition by increasing flux of immersion liquiol. The invention has much strongpoint including low cost, little investment, brief craft flow, small environmental pollution and moderate biochemical reaction etc. Safe manufacturing techniques of high-sulphur ore are formed by combining with the craft of original mining, which eliminate intrinsic fire hazards of high-sulphur deposit radically to advance father effect and reduce father cost. The invention is applicable for mining enterprises with spontaneous ignition such as chemical, colored and black mines etc.

Description

technical field [0001] The invention belongs to the technical field of mineral deposit fire prevention, and relates to a method for controlling spontaneous combustion of sulfide ore by bacterial leaching, which is suitable for the control of spontaneous combustion and ignition of high-sulfur mineral deposits. Background technique [0002] In the mining of sulfur-bearing ores, internal fire is one of the main disasters. According to statistics, about 20% to 30% of pyrite and 5% to 10% of nonferrous metal or polymetallic sulfide ores in China have internal fire hazards. For example, there were 68 internal fires in Xiangshan Pyrite Mine between 1955 and 1980, and more than 100 underground fires in Songshushan Copper Mine. Similar problems also exist in foreign sulfide ores. In May 1972, 91 people were killed in a single fire at the Klock Mine in the United States, and there were more than 300 fires at the Ural Copper Mine in the former Soviet Union. [0003] In terms of spon...

Claims

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Application Information

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IPC IPC(8): C22B3/18E21F5/00
CPCY02P10/20
Inventor 吴爱祥王洪江王贻明苏永定陈学松韩斌冯巨恩尹升华
Owner UNIV OF SCI & TECH BEIJING
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