Method for increasing recovery rate of complex refractory iron oxide ores

A technology of iron oxide and recovery rate, which is applied in chemical instruments and methods, wet separation, solid separation, etc., to achieve the effects of reducing inclusions, strengthening recovery effect, and improving recovery rate

Inactive Publication Date: 2019-04-02
GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problems existing in the prior art, to provide a kind of wide application range, easy realization of industrial production, strong operability, enhanced fine-grained recovery to improve the recovery rate of complex refractory iron oxide ore method

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  • Method for increasing recovery rate of complex refractory iron oxide ores

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Embodiment 1

[0021] Step 1. Preparation of complex and refractory iron oxide ores before sorting: For weak iron ore with an iron grade below 40%, mineral embedded particle size below 74 microns, and iron minerals and gangue minerals composed of 3 or more types The magnetic iron oxide ore is crushed in the stope, and when the particle size reaches 20mm or less, it is transported to the concentrator, and then undergoes two stages of continuous wet grinding and classification operations to ensure that 80% of the materials entering the beneficiation are -200 mesh.

[0022] Step 2, strong magnetic roughing: prepare the selected slurry with a mass concentration of 40% of the material prepared in step 1, and feed the selected slurry into a vertical ring pulsating strong magnetic separator with a diameter of 2mm as the magnetic gathering medium to complete the roughing operation , roughing operation to obtain concentrate pulp and tailings pulp, and the concentrate pulp is pumped into the concentrat...

Embodiment 2

[0026] Step 1. Preparation of complex and refractory iron oxide ores before sorting: For weak iron ore with an iron grade below 40%, mineral embedded particle size below 74 microns, and iron minerals and gangue minerals composed of 3 or more types The magnetic iron oxide ore is crushed in the stope, and when the particle size reaches 20mm or less, it is transported to the dressing plant, and then undergoes two stages of continuous wet grinding and classification operations to ensure that 90% of the materials entering the separation with a particle size of -200 mesh.

[0027] Step 2, strong magnetic roughing: the material prepared in step 1 is prepared into a selected slurry with a mass concentration of 50%, and the selected slurry is fed into a vertical ring pulsating strong magnetic separator with a diameter of 3mm as the magnetic gathering medium to complete the roughing operation , roughing operation to obtain concentrate pulp and tailings pulp, and the concentrate pulp is p...

Embodiment 3

[0031]Step 1. Preparation of complex and refractory iron oxide ores before sorting: For weak iron ore with an iron grade below 40%, mineral embedded particle size below 74 microns, and iron minerals and gangue minerals composed of 3 or more types The magnetic iron oxide ore is crushed in the stope, and when the particle size reaches 20mm or less, it is transported to the concentrator, and then undergoes two stages of continuous wet grinding and classification operations to ensure that 85% of the materials entering the beneficiation are -200 mesh.

[0032] Step 2, strong magnetic roughing: the material prepared in step 1 is prepared into a selected slurry with a mass concentration of 45%, and the selected slurry is fed into a vertical ring pulsating strong magnetic separator with a diameter of 2 mm as the magnetic gathering medium to complete the roughing operation , roughing operation to obtain concentrate pulp and tailings pulp, and the concentrate pulp is pumped into the conc...

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Abstract

The invention discloses a method for increasing the recovery rate of complex refractory iron oxide ores. The method comprises the steps that firstly, the complex refractory iron oxide ores are pretreated, then selected slurry is prepared and subjected to rough concentration operation to obtain concentrate pulp and tailings pulp, the concentrate pulp is pumped into a concentrate concentration largewell, the tailings pulp is graded into a fine fraction part and a coarse fraction part, the fine fraction part and the coarse fraction part are sorted separately, the sorting process parameters are set individually, inclusions are reduced, and the recovery effect is good; a vertical ring high intensity magnetic separator with a special-shaped poly magnetic medium is used for primary scavenging operation of the fine fraction part after coarse and fine grading, and the recovery effect of the micro-size fraction is reinforced; and a horizontal ring high intensity magnetic separator is utilized to conduct secondary scavenging operation on the fine fraction part after coarse and fine grading, a selective flocculation process is conducted before secondary scavenging, and thus the interference of vertical ring pulse jig frequency on selective flocculation is avoided. According to the method, the metal recovery rate is effectively increased, the application range is wide, industrial production is easy to achieve, operability is high, and the effect of increasing the recovery rate of fine fraction mineral separation is remarkable.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a method for improving the recovery rate of complex refractory iron oxide ore. Background technique [0002] The separation of iron oxide ores by strong magnetic separation is one of the most widely used and effective beneficiation methods at present, but for complex and refractory iron oxide ores, the recovery effect is very limited. Due to the complex and refractory iron oxide ore has the characteristics of low iron grade, complex mineral composition, fine mineral particle size, and small magnetic difference between iron minerals and gangue minerals, the conventional strong magnetic separation process and facility recovery are adopted to ensure that most minerals are single. Under the conditions of the grinding process of body dissociation, due to the difference in grindability among various minerals, the particle size of some iron minerals is bound to be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03B9/00
CPCB03B7/00B03B9/00
Inventor 王彩虹李广文李文博
Owner GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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