Efficient coal derived pyrite dry-method enrichment process and system

A pyrite and dry process technology is applied in the field of high-efficiency coal-measure pyrite dry enrichment process and system field, which can solve the problems of easy oxidation of sulfur elements, shortage of water resources, and high production costs, and avoid secondary Pollution problems, reduced land use, little effect of dust pollution

Active Publication Date: 2015-11-25
CHINA UNIV OF MINING & TECH
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Problems solved by technology

[0004] At present, the enrichment of pyrite in gangue is mainly based on wet separation, and the sulfur element in pyrite is easily oxidized when it meets water, causing spontaneous combustion and other phenomena. After separation, the concentrate needs to be dried and dehydrated. The production cost is high; at the same time, wate

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  • Efficient coal derived pyrite dry-method enrichment process and system
  • Efficient coal derived pyrite dry-method enrichment process and system
  • Efficient coal derived pyrite dry-method enrichment process and system

Examples

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Effect test

Embodiment 1

[0031] When the pyrite in the high-sulfur gangue is mainly distributed in coarse-grained aggregates with a high degree of dissociation, no crushing operation is required, and a dry heavy-medium fluidized bed separator / combined dry separator and vibration Fluidized bed separator combined enrichment process.

[0032] exist figure 2 Among them, the enrichment process of pyrite in high-sulfur gangue of the present invention mainly includes: material preparation, dry method heavy medium fluidized bed separator / compound dry method separator, vibrating fluidized bed separator Choose three parts. The material preparation part includes grading screen and buffer bin; the sorting part includes dry heavy medium fluidized bed sorter / combined dry sorter vibrating fluidized bed sorter sorter. Specific steps are as follows:

[0033] (1) Material preparation: Use a 6mm grading sieve to divide the material to be selected (high-sulfur coal gangue) into two particle size grades of +6mm and -6...

Embodiment 2

[0038] When the pyrite in the high-sulfur gangue has a fine particle size and a low degree of dissociation, the sample is first crushed and dissociated, and the vibrating fluidized bed separator is directly used to enrich the sulfur iron in the fine-grained high-sulfur gangue mine.

[0039] exist image 3 Among them, the enrichment process of pyrite in high-sulfur gangue of the present invention mainly includes two parts: material preparation and vibrating fluidized bed sorting machine sorting. The material preparation part includes grading screen and buffer bin; the sorting part of vibrating fluidized bed separator includes vibrating fluidized bed sorting machine. Specific steps are as follows:

[0040] (1) Material preparation: Use a crusher to crush the material to be selected (high-sulfur coal gangue) to -6mm, and sieve the -6mm material into -6+3mm, -3+1mm, -1+0.5mm, -0.5 There are four grades of mm, and the screened material is sent to the buffer bin; the -0.5mm mater...

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Abstract

The invention belongs to mineral processing separation processes and systems, and relates to an efficient coal derived pyrite dry-method enrichment process and a system. When pyrite is inlaid in a coarse aggregate manner and the degree of dissociation is high, no breaking operation is needed. A dry-method dense medium fluidized bed separation machine or a composite dry-method separation machine and a vibration fluidized bed separation machine are combined with the enrichment process. When the disseminated grain size of pyrite in high-sulfur gangue is lower than the fine degree of dissociation, breaking and dissociation operation is carried out on samples, and the vibration fluidized bed separation machine is adopted for carrying out enrichment on brasses in fine-grain high-sulfur gangue. Gangue materials of +6 mm in a pyrite buffer bin are recycled by the dry-method dense medium fluidized bed separation machine and the composite dry-method separation machine and enter the separation machine through a feeder and a belt conveyor, high-density pyrite enters the bottom of a bed layer to be separated from gangue, concentrates and tailings enter a concentrate bin and a tailing bin respectively, the concentrates are pyrite, and the tailings are gangue. The process is simple in procedure, reasonable in technical path, large in handling capacity and stable in running, and running cost is effectively reduced.

Description

technical field [0001] The invention relates to a mineral processing and sorting process and system, in particular to a high-efficiency coal-measure pyrite dry enrichment process and system. technical background [0002] As the largest industrial waste in my country, coal gangue accounts for about 25% of the industrial waste discharged in my country every year. With the further increase of my country's coal mining volume and coal selection rate, it is estimated that the discharge of coal gangue will reach more than 800 million tons in 2015, and the cumulative storage will be close to 4.5 billion tons. Minerals in coal gangue often undergo chemical reactions under unfavorable natural conditions such as sunlight, rain, and weathering, producing a large amount of acidic water or ionized water carrying heavy metals, which seriously pollutes the ecological environment of the mining area. In addition, gangue often contains pyrite and carbon-containing minerals, and there is a hid...

Claims

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Application Information

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IPC IPC(8): B03B7/00
CPCB03B7/00
Inventor 张博赵跃民周晨阳段晨龙骆振福宋树磊
Owner CHINA UNIV OF MINING & TECH
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