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Treatment method of limestone tailings water

A treatment method and tailings water technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, dehydration/drying/thickened sludge treatment, etc., can solve resource waste, poor treatment effect, stone content To avoid the waste of resources and benefit the environment

Inactive Publication Date: 2013-07-24
GUIZHOU ANKAIDA IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Now the treatment of tailings water often adopts natural precipitation method or concentrated precipitation method, which has the disadvantages of long time consumption and poor treatment effect. There is also the problem that the obtained tailings slag is dehydrated by belt filter or plate and frame filter. The stone content in the product is too much, and the water content is high, which has the disadvantage that it cannot be directly used as mine reclamation and greening
If the tailings slag is discharged directly, it will increase environmental pollution. In addition, the tailings slag also contains high-quality limestone, and direct discharge will also cause waste of resources.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Transport the limestone tailings water with a mud content of 3% to the transition tank, and pump the limestone tailings water in the transition tank to a cyclone with a diameter of 600 mm for solid-liquid separation to obtain wet stone powder and muddy water; The wet stone powder is screened with a screen area of ​​10m 2 The high-frequency dewatering screen is used for dehydration treatment to obtain dry stone powder and water; when the muddy water is transported to the first sedimentation tank for primary sedimentation until the solid content rate is 10%, it is sucked into the second sedimentation tank by a suction mud scraper for secondary sedimentation When the solid content reaches 20%, the mud pump is pumped to a centrifugal dehydrator with a diameter of 650mm for separation to obtain molded tailings and water with a water content of 34%.

[0019] Among them, the processed water can be recycled, the processed stone powder can be used directly, and the processed slu...

Embodiment 2

[0021] Transport the limestone tailings water with a mud content of 3% to the transition tank, and pump the limestone tailings water in the transition tank to a cyclone with a diameter of 600 mm for solid-liquid separation to obtain wet stone powder and muddy water; The wet stone powder is screened with a screen area of ​​10m 2 The high-frequency dewatering screen is used for dehydration treatment to obtain dry stone powder and water; when the muddy water is transported to the first sedimentation tank for primary sedimentation to a solid content rate of 7%, it is sucked into the second sedimentation tank by a suction mud scraper for secondary sedimentation When the solid content reaches 20%, the mud pump is used to pump to a centrifugal dehydrator with a diameter of 650mm for separation to obtain molded tailings and water with a water content of 32%.

[0022] Among them, the processed water can be recycled, the processed stone powder can be used directly, and the processed slu...

Embodiment 3

[0024] Transport the limestone tailings water with a mud content of 10% to the transition tank, and pump the limestone tailings water in the transition tank to a cyclone with a diameter of 1000 mm for solid-liquid separation to obtain wet stone powder and muddy water; The wet stone powder is screened with an area of ​​18m 2 The high-frequency dewatering screen is used for dehydration treatment to obtain dry stone powder and water; the muddy water is transported to the first sedimentation tank for primary sedimentation until the solid content rate is 8%, and then sucked into the second sedimentation tank by suction mud scraper for secondary sedimentation When the solid content reaches 20%, the mud pump is used to pump to a centrifugal dehydrator with a diameter of 1100mm for separation, and the formed tailings and water with a water content of 31% are obtained.

[0025] Among them, the processed water can be recycled, the processed stone powder can be used directly, and the pro...

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PUM

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Abstract

The invention relates to a treatment method of limestone tailings water. The method comprises the following steps of: a, performing solid-liquid separation, namely treating tailings water by solid-liquid separation to obtain wet limestone powder and mud water; b, dehydrating the wet limestone powder to obtain dry limestone powder and water, placing the mud water into a first sedimentation tank for first-level sedimentation until the solid content is 7-10%, and then sucking the mud water in the first sedimentation tank into a second sedimentation tank for second-level sedimentation by a aspiration sludge scraper until the solid content is larger than or equal to 15%, so as to obtain slurry; and c, performing dehydration, namely dehydrating the slurry to obtain the moulding tailing mud with larger than or equal to 30% of moisture content and water. The treatment method provided by invention has the beneficial effects of separating the limestone powder, mud and water in the tailings water and recycling the separated limestone powder, mud and water so as to avoid resource waste and benefit environmental protection while according with the relevant national policy on the environmental protection.

Description

technical field [0001] The invention relates to the field of limestone production and processing, in particular to a treatment method for limestone tailings water. Background technique [0002] In the mining process of limestone mines, because the ore contains soil, in order to obtain limestone finished ore with a certain particle size and concentrate grade, it is often necessary to clean the mined limestone raw ore, so a large amount of tailings water will be produced. The generated tailings water will cause serious damage to groundwater resources and the surrounding environment. Therefore, the treatment of tailings water is imminent. [0003] Now the treatment of tailings water often adopts natural precipitation method or concentrated precipitation method, which has the disadvantages of long time consumption and poor treatment effect. There is also the problem that the obtained tailings slag is dehydrated by belt filter or plate and frame filter. The stone content in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/02C02F11/12
Inventor 葛洪邓建军王汝明张继光张文栋梁远鹏
Owner GUIZHOU ANKAIDA IND