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A tailings dehydration method

A technology for tailings and minerals, applied in the field of fine-grained tailings dewatering, can solve the problems of low utilization rate of fine-grained tailings and coarse-grained tailings, complex processes, and large surface area, so as to improve the utilization rate of tailings and reduce emissions. to achieve the effect of energy saving and emission reduction

Active Publication Date: 2015-11-18
NANJING MEISHAN METALLURGY DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to the fine particle size, large surface area, and high moisture content of the fine tailings, in order to meet the requirements of the subsequent process for utilization, most of the moisture must be removed to meet the needs of transportation and utilization. The process is complex and the cost is high. At present, there is no technical and economic feasibility. Therefore, the utilization rate of fine tailings is lower than that of coarse tailings

Method used

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  • A tailings dehydration method

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Effect test

Embodiment 1

[0025] like figure 1 A described tailings dehydration method comprises the following steps:

[0026] a, carry out slag separation treatment to hydrous minerals, the hydrous mineral weight concentration described in this embodiment is less than 10%, and fineness is less than 74 microns, and content is 60%, removes slag and sundry wherein, avoids clogging equipment, isolates The slag treatment adopts a cylindrical slag separation screen whose screen surface is a stainless steel woven screen with a screen hole size of 1mm×1mm, and the slag separation screen is a slurry composed of ore and water less than 1mm in size.

[0027] b. Send the pulp separated from the slag to the center-driven ordinary thickener for sedimentation and concentration to obtain clarified overflow water and concentrated underflow. The concentration of the concentrated underflow is 30%.

[0028] c. The concentrated underflow is transported to the hydrocyclone for classification by the slurry pump, and the or...

Embodiment 2

[0033] like figure 1 Described a kind of tailings dehydration method, comprises the following steps:

[0034] a, carry out slag separation treatment to hydrous minerals, the weight concentration of hydrous minerals described in this embodiment is less than 10%, fineness is less than 74 microns, and content is 80%, removes slag and sundry wherein, avoids clogging equipment, isolates The slag treatment adopts a cylindrical slag separation screen whose screen surface is a stainless steel woven screen with a screen hole size of 1mm×1mm, and the slag separation screen is a slurry composed of ore and water less than 1mm in size.

[0035] b. The ore pulp separated from slag is sent to the peripheral transmission type ordinary thickener for sedimentation and concentration to obtain clarified overflow water and concentrated underflow, and the concentration of the concentrated underflow is 20%.

[0036] c. Through the slurry pump, the concentrated underflow is transported to the cyclon...

Embodiment 3

[0041] like figure 1 A described tailings dehydration method comprises the following steps:

[0042] a. Carry out slag separation treatment to hydrous minerals, the hydrous mineral weight concentration described in this embodiment is less than 10%, fineness is less than 74 microns, and content is 70%, removes slag and sundry therein, avoids clogging equipment, isolates The slag treatment adopts a cylindrical slag separation screen whose screen surface is a stainless steel woven screen with a screen hole size of 1mm×1mm, and the slag separation screen is a slurry composed of ore and water less than 1mm in size.

[0043] b. The ore pulp after slag separation is sent to the peripheral transmission type ordinary thickener for sedimentation and concentration to obtain clarified overflow water and concentrated underflow. The concentration of the concentrated underflow is 26%.

[0044] c. The concentrated underflow is transported to the hydrocyclone for classification through the sl...

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Abstract

The invention discloses a tailing dewatering method which comprises the following steps of: (a) carrying out residue filtration treatment on water-containing minerals to remove residues and impurities which are contained in the water-containing minerals; (b) precipitating and concentrating ore slurry with residues removed to obtain clear overflow water and concentrated underflow; (c) carrying out cyclone grading on the concentrated underflow to obtain overflow and silt; and (d) feeding the cyclone silt into a filter for filtering to obtain a coarse grain filter cake. According to the tailing dewatering method, fine-grain grade water-containing tailings which are extremely difficult to dewater are graded and separated into relatively thick and thin tailings to be respectively dewatered, coarse grains are subjected to ceramic filtration, fine grains are subjected to high-efficiency concentration and pressure filtration, and the moisture of obtained filter cakes meets the requirement of transportation and utilization; the two tailings have low moisture, and dry stacking can be realized by selecting an appropriate field, so that the huge investment and safety risk of tailing warehouse construction are reduced; and the tailing utilization ratio can be enhanced, the tailing discharge amount can be reduced, the energy conservation and emission reduction can be realized, and the problems of safety and environmental friendliness of tailing stacking can be solved.

Description

technical field [0001] The invention relates to a method for dehydrating fine tailings, belonging to the field of material dehydration. Background technique [0002] Tailings are currently the largest industrial solid waste produced in my country. According to the 2009 development report of the China Association of Comprehensive Utilization of Resources, the total tailings production in my country in 2009 was 1.192 billion tons, accounting for more than 45% of the national industrial solid solid waste, while the comprehensive utilization rate was only 13.3%, and 100 More than 100 million tons. [0003] Judging from the proven reserves of iron ore resources, iron ore resources generally have the characteristics of poor, fine, and miscellaneous, that is, iron ore has low iron grade, fine embedded particle size, and complex occurrence state, so it needs crushing, grinding, Only by wet separation can we get high-grade iron ore concentrate, and at the same time, a large amount of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D36/00
Inventor 衣德强刘安平甘茂武于发张小明
Owner NANJING MEISHAN METALLURGY DEV