A thickening and dewatering method for tailings and applications thereof

A technology for concentrating and dehydrating tailings, which is applied in the field of concentrating and dehydrating fine-grained tailings and tailings concentrating and dehydrating. It can solve the problems of large land occupation, high power consumption, and large pumping volume, and achieve single equipment and easy operation. , easy to manage the effect

Inactive Publication Date: 2016-03-02
范思远 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional tailings storage process, the tailings slurry is pumped to the tailings storage through pipelines. Due to the problems of large pumping volume and high power consumption, a pre-concentration process is added before pipeline transportation. Concentration first, then pumping However, the problems of high power consumption, large land occupation, and potential safety hazards have not been fundamentally improved.

Method used

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  • A thickening and dewatering method for tailings and applications thereof
  • A thickening and dewatering method for tailings and applications thereof
  • A thickening and dewatering method for tailings and applications thereof

Examples

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Effect test

Embodiment 1

[0019] Referring to Figure 1(A), the comprehensive production capacity of a molybdenum mine is 3000t / d. The ore dressing plant adopts the process of "two and a half stages" closed-circuit crushing and one-stage closed-circuit grinding. To produce molybdenum concentrate, it is required to adopt the tailings treatment plan of dry discharge and dry pile. According to the present invention, the tailings 1 after grinding and flotation are automatically fed into the dense tank after adding flocculant at the tail outlet, and after settling and concentrating, the bottom flow 3 of the dense tank is pumped from the slurry to the dehydration plant through hydrocyclone The overflow 4 of the dense pool flows to the return pool as the mineral processing circulating water; after the concentrated tailings (underflow 3) fed into the hydrocyclone are concentrated for the second time, the sand settling 5 is controlled by the solenoid valve through the mixing tank Feed into the ceramic filter, th...

Embodiment 2

[0021] Referring to Figure 1(B), the comprehensive mining and dressing production capacity of an iron mine is 12,000t / d. The ore dressing plant adopts a two-stage closed-circuit crushing and one-stage closed-circuit grinding process. After desulfurization by flotation and phosphorus reduction by magnetic separation, iron concentrate is obtained. For mineral products, it is required to adopt the tailings treatment plan of dry discharge and dry pile. According to the present invention, the tailings 1 after grinding, flotation, and magnetic separation are fed into the dense pool by adding flocculant at the tailing outlet, and then fed into the dense pool by gravity. The hydrocyclone carries out secondary concentration, and the overflow 4 of the dense pool flows to the return pool; the concentrated tailings (underflow 3) fed into the hydrocyclone undergoes secondary concentration, and the sand settling 5 passes through the mixing tank and is controlled by a solenoid valve. into th...

Embodiment 3

[0023] Referring to Figure 2(A), the comprehensive production capacity of a molybdenum mine is 3000t / d. The ore dressing plant adopts the process of "two and a half stages" closed-circuit crushing and one-stage closed-circuit grinding. To produce molybdenum concentrate, it is required to adopt the tailings treatment plan of dry discharge and dry pile. According to the present invention, the tailings 1 after grinding and flotation are automatically fed into the dense tank after adding flocculant at the tailing outlet, and after settling and concentrating, the bottom flow 3 of the dense tank is pumped from the slurry to the dehydration plant through hydrocyclone The device I carries out secondary concentration, and the overflow 4 of the dense pool flows to the return pool; after the concentrated tailings (underflow 3) fed into the hydrocyclone are concentrated for the second time, the sand settling 5 is fed into the mixing tank, and the overflow 6 is fed into the mixing tank. Th...

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Abstract

The invention relates to a thickening and dewatering method for tailings. The method is suitable for thickening and dewatering fine-granule tailings adopting dry stockpiling or a comprehensive utilization plan. According to the method, tailings fed into a stirring barrel are subjected to secondary thickening by adopting a hydrocyclone so as to increase the concentration of tailings fed into a ceramic filter, overflow of the hydrocyclone and filtrate of the ceramic filter are returned to a thickening pond and mixed with fine-granule tailings discharged from an ore dressing process so as to reduce the concentration of the tailings and to increase the deposition speed of the tailings, thus finally achieving the objectives of increasing the efficiency of the ceramic filters and reducing the cost of dewatering.

Description

【Technical field】 [0001] The invention belongs to the fields of mineral processing, energy saving and environmental protection, and particularly relates to a method for concentrating and dehydrating tailings, which is suitable for concentrating and dehydrating fine-grained tailings in dry stockpiling or comprehensive utilization schemes. 【Background technique】 [0002] Tailings are wastes produced by mines. At present, most mines in China use tailings banks to store wet fine-grained tailings. In the traditional tailings storage process, the tailings slurry is pumped to the tailings storage through pipelines. Due to the problems of large pumping volume and high power consumption, a pre-concentration process is added before pipeline transportation. Concentration first, then pumping However, the problems of high power consumption, large land occupation, and potential safety hazards have not been fundamentally improved. [0003] With the country's increasing requirements for mi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D36/04
Inventor 范思远范庆霞
Owner 范思远
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