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Pre-sieving technology added before flotation operation

A pre-operation and flotation technology, which is applied in flotation, filtration, magnetic separation, etc., can solve the problems of flotation reagent consumption, impact on flotation operations, and reduction of flotation processing capacity.

Inactive Publication Date: 2009-07-29
ANSTEEL GRP MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in the combined process of grinding lean hematite ore, magnetic separation-gravity separation-anion reverse flotation, some low-grade coarse particles exist in the materials fed to the flotation operation, and the particle size of these coarse particles is +200 mesh The content is 10-15%, and the iron grade is 9-11%. This part of the coarse and low-grade particles enters the flotation operation and can only enter the flotation tailings. capacity, which affects the flotation operation

Method used

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  • Pre-sieving technology added before flotation operation
  • Pre-sieving technology added before flotation operation

Examples

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Effect test

Embodiment 1

[0014] Example 1. When the flotation feed ore particle size is -200 mesh and 85%, select 0.2mm sieve hole to screen the flotation feed ore, and the under-sieve material with a yield of -200 mesh of 88% and a grade of 45% can be screened out , +200 mesh yield 12%, grade 10% of the sieve material, this part can be directly thrown tail.

Embodiment 2

[0015] Example 2. When the flotation feed ore particle size is -200 mesh and 85%, select 0.18mm sieve hole to screen the flotation feed ore, and the under-sieve material with a yield of -200 mesh of 86.5% and a grade of 46.5% can be screened out , +200 mesh yield 13.5%, grade 11.5% of the sieve material, this part can be directly thrown tail.

Embodiment 3

[0016] Example 3. When the flotation feed ore particle size is -200 mesh and 85%, select 0.15mm sieve hole to screen the flotation feed ore, and the under-sieve material with a yield of -200 mesh of 85% and a grade of 47% can be screened out , +200 mesh yield 15%, grade 13% of the sieve material, this part can be directly thrown tail.

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Abstract

The invention relates to a prescreening process added before floatation operation. The prescreening process is characterized in that the process comprises: adding the prescreening process during thickness classification operation before floatation; condensing floatation fed ore through a large condensation well; carrying out purification treatment of condensation overfall; feeding condensation underset into a sieve to carry out screen separation; feeding minus mesh into floatation operation to carry out floatation; taking plus sieve and floatation operation tailings as floatation tailings; and taking floatation operation ore concentrate as floatation ore concentrate. A vibration sieve (with the sieve mesh ranging from 0.1 to 0.2 mm) is installed before floatation feeding to carry out screen separation of floatation fed ore; minus mesh is fed into a floatation operation feeding box to carry out floatation, while plus sieve and floatation operation tailings are combined as operation tailings; moreover, material overflowed during thickness classification operation before floatation is turned into floatation operation feeding material through magnetic separation operation. The prescreening process can eliminate coarse granule during floatation operation, thereby increasing floatation milling grade and treatment capacity of floatation operation and reducing the consumption of floatation reagent.

Description

technical field [0001] The invention belongs to the technical field of iron ore separation, and relates to a combined process of stage grinding of lean hematite, magnetic separation-gravity separation-anion reverse flotation, in particular to a pre-screening process before flotation operation. Background technique [0002] At present, in the combined process of grinding lean hematite ore, magnetic separation-gravity separation-anion reverse flotation, some low-grade coarse particles exist in the materials fed to the flotation operation, and the particle size of these coarse particles is +200 mesh The content is 10-15%, and the iron grade is 9-11%. This part of the coarse and low-grade particles enters the flotation operation and can only enter the flotation tailings. capacity, affecting the flotation operation. Contents of the invention [0003] The present invention overcomes the above-mentioned defects and aims to provide a screening process before the flotation operati...

Claims

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Application Information

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IPC IPC(8): B03B7/00B07B1/28B03D1/00B03C1/00
Inventor 徐俊峰
Owner ANSTEEL GRP MINING CO LTD
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