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Magnetic gravity combined sorting process

A magnetic-gravity combination and sorting technology, applied in magnetic separation, high-gradient magnetic separator, solid separation, etc., can solve the problem of loss of fine-grained weak magnetic minerals, eliminate mechanical inclusions, improve recovery rate, and reduce clogging The effect of the phenomenon

Active Publication Date: 2019-03-29
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the magnetic-gravity combined separation process using high-gradient magnetic separation and centrifuge is used for weak magnetic minerals. An important problem is that the loss of fine-grained weak magnetic minerals is serious in the gravity separation process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Such as Figure 4 Shown, a kind of combined magnetic gravity sorting process comprises the following steps:

[0042] (1) Grinding the specularite strong magnetic tailings with a grade of 20% to -200 mesh accounts for 85%, and adjusting the slurry to a mass concentration of 30%, as the ore feeding of the vertical ring pulsating high gradient magnetic separator, under the magnetic field strength Sorting is carried out under the condition of 5000-14000GS to obtain a rough concentrate with a grade of 45%;

[0043] (2) It is 35% that the thick ore that obtains is slurried to mass concentration, adopts coacervation method to carry out the magnetic cover processing of weakly magnetic mineral, and processing method is as follows: regulate ore slurry pH to about 6.5, add 1% (with feed ore mass ratio) of fine Fe 3 o 4 Granules, the stirring time is 5min, then add 25g / t (relative to ore) sodium hexametaphosphate, and continue to stir for 3min;

[0044] (3) Feed the coarse conc...

Embodiment 2

[0048] The combined magnetic-gravity separation process and the centrifuge in this embodiment are the same as in Example 1, the difference is that the vertical ring pulsating high-gradient magnetic separator in the separation process is a vertical ring high-gradient magnetic separator with the following structure , the specific structure is: the vertical ring high-gradient magnetic separator (not containing a pulsation generator for applying pulsating flow) includes a swivel 40, a magnetic field generator and a feeding system 50, and the feeding system 50 is located inside the swivel 40, A magnetic medium stack is continuously and evenly arranged in the swivel 40, and the magnetic medium stack is composed of a plurality of magnetic media. Among them, the magnetic medium is provided with a non-magnetic part 10 and a magnetic part 20 in sequence along the flow direction of the pulp, and the non-magnetic part 10 and the magnetic part 20 are fixed to each other, and the edge of the...

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Abstract

A magnetic gravity combined sorting process is characterized by comprising the following steps that (1) a magnetic separator is utilized for carrying out roughing on weak magnetic ore to obtain roughconcentrates; (2) fine Fe3O4 particles are utilized for carrying out magnetic covering treatment on the rough concentrates, and the Fe3O4 particles selectively cover the surface of the weak magnetic ore in the rough concentrates; and (3) the rough concentrates subjected to magnetic covering treatment are conveyed into a centrifugal machine with a magnetic field for concentration, heavy products and light products are obtained, and concentrate products can be obtained by collecting the heavy products. According to the magnetic gravity combined sorting process, the magnetism of the weak magneticore is improved through the magnetic covering method, the fine-particle weak magnetic ore generates the aggregation function through the magnetic field of the magnetic centrifugal machine and finallyenters the heavy products under the centrifugal function of the centrifugal machine to form the concentrates, and the recovery rate of the fine-particle weak magnetic ore can be greatly improved.

Description

technical field [0001] The invention belongs to the field of mineral processing, in particular to a process for sorting weakly magnetic minerals. Background technique [0002] Weak magnetic mineral resources mainly include hematite, limonite, siderite, ilmenite, wolframite, manganese ore and tantalum-niobium rare earth ore. These weakly magnetic mineral raw materials have played an important role in my country's economic development. High gradient magnetic separation is a common method for processing weak magnetic minerals, but due to the mechanical inclusion of gangue minerals, it is difficult to obtain qualified weak magnetic mineral concentrate products in a single high gradient magnetic separation operation, and high gradient magnetic separation is usually used in production Rough separation, the obtained rough concentrate is then subjected to flotation and concentration to obtain the final concentrate product. The process is complicated, the consumption of flotation re...

Claims

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Application Information

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IPC IPC(8): B03C1/031B03C1/30B03D3/02B03D3/06B04C9/00
CPCB03C1/031B03C1/30B03D3/02B03D3/06B04C9/00Y02W30/52
Inventor 郑霞裕王毓华卢东方薛子兴
Owner CENT SOUTH UNIV
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