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Fine-particle magnetite beneficiation process

A technology of magnetite and fine particles, applied in the field of mineral processing, can solve the problems of waste of production resources, waste of resources, excessive waste of chemicals, etc., and achieve the effects of protecting the environment, reducing complexity, and reducing pollution

Inactive Publication Date: 2020-04-28
LIAONING INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the patent has the following problems: the reverse flotation process uses the cationic collector dodecylamine as the beneficiation agent, and the adjustment of the concentration and flow of the agent needs to match the properties of the ore. Real-time adjustment, but affected by the delay of the processing technology, the speed of chemical preparation cannot keep up with the speed of ore property change, resulting in serious waste of excessive chemical or insufficient chemical ore, resulting in fluctuations in the operation of the beneficiation production process and affecting iron concentrate output and quality, increase production costs, and waste production resources
During the beneficiation process of the magnetic separator, a large number of iron ore concentrate particles will be pushed by the slurry flow to generate great inertia. Since the particle size of the fine-grained ore reaches the micron level and the magnetic force is small, it is difficult to be adsorbed on the magnetic drum. The ore flow is thrown away, resulting in ore with low metal recovery rate, and the tailings of the three-stage magnetic separation process are all discharged, wasting a lot of resources

Method used

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Examples

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Embodiment 1

[0031] A fine-grained magnetite ore dressing process, comprising the following steps:

[0032] 1. The lean ore iron ore (grade 21.66%) is firstly ground by a ball mill (model Φ5.03×6.7m), and the product of the first stage of grinding enters a hydrocyclone (Φ660mm) for a grading operation to obtain a grading Grit products and primary grading overflow products (-200 mesh content 67.60%, concentration 52.2%), dedusting returns to the first stage ball mill for regrinding to form closed-loop grinding; primary grading overflow products enter the first stage magnetic separator (Φ1200×4500) The magnetic separation operation is carried out under the condition of a magnetic field strength of 135.5kA / m, and a section of coarse concentrate is magnetically separated to enter the next process, and the tailings are thrown out to become the final tailings;

[0033] 2. Carry out secondary hydrocyclone (Φ 350mm) classification with the one-stage magnetic separation product that above-mentioned...

Embodiment 2

[0038] A fine-grained magnetite ore dressing process, comprising the following steps:

[0039] 1. The lean ore iron ore (grade 23.72%) is firstly ground by a ball mill (model Φ5.03×6.7m), and the product of the first stage of grinding enters a hydrocyclone (Φ660mm) for a grading operation to obtain a grading Grit products and primary grading overflow products (-200 mesh content 71.1%, concentration 45.2%), dedusting returns to the first-stage ball mill for regrinding to form closed-loop grinding; primary grading overflow products enter the first-stage magnetic separator (Φ1200×4500) The magnetic separation operation is carried out under the condition of a magnetic field strength of 135.5kA / m, and a section of coarse concentrate is magnetically separated to enter the next process, and the tailings are thrown out to become the final tailings;

[0040] 2. Carry out secondary hydrocyclone (Φ 350mm) classification with the one-stage magnetic separation product obtained in the above...

Embodiment 3

[0045] A fine-grained magnetite ore dressing process, comprising the following steps:

[0046] 1. The lean ore iron ore (grade 24.43%) is firstly ground by a ball mill (model Φ5.03×6.7m), and the first-stage grinding product enters a hydrocyclone (Φ660mm) for a grading operation to obtain a grading Grit products and primary grading overflow products (-200 mesh content 65.2%, concentration 48.2%), dedusting returns to the first stage ball mill for regrinding to form closed-loop grinding; primary grading overflow products enter the first stage magnetic separator (Φ1200×4500) The magnetic separation operation is carried out under the condition of a magnetic field strength of 135.5kA / m, and a section of coarse concentrate is magnetically separated to enter the next process, and the tailings are thrown out to become the final tailings;

[0047] 2. Carry out secondary hydrocyclone (Φ 350mm) classification with the one-stage magnetic separation product that above-mentioned steps obta...

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Abstract

The invention discloses a fine-particle magnetite beneficiation process, and belongs to the technical field of mineral processing. In the prior art, the problems that agents are excessively and seriously wasted, the production cost is increased, a large amount of fine-particle iron ore is thrown away along with tailing flow, the recovery rate is low which leads to waste, and thus the method is provided. By means of the fine-particle magnetite beneficiation process, the effects of iron extraction and yield increase can be achieved, and the process is particularly suitable for selection of magnetite ore which can achieve monomer dissociation only when the magnetite ore is finely ground to 500 meshes and reaches 95%. According to the fine-particle magnetite beneficiation process, a stage grinding single low-intensity magnetic selection process is used, and no agent is used in the mineral processing process; meanwhile, a three-time hydrocyclone, a one-time concentrator and a three-sectionball mill form a circulating ore grinding system for improving the grade of iron ore concentrate, the dissociation granularity of the iron ore concentrate is improved, and the grade of the iron ore concentrate is improved by 1%-1.5%; and finally, tailings are recovered for re-selection, so that the metal recovery rate is increased, and the iron content of the tailings is reduced.

Description

technical field [0001] The invention belongs to the technical field of ore dressing, and specifically relates to a fine-grained magnetite ore dressing process, which can achieve the effects of increasing iron production and energy saving of low-grade magnetite, and is especially suitable for fine grinding to 500 mesh to achieve 95% of the monomer Sorting of dissociated magnetite ore. Background technique [0002] With the massive development and utilization of mineral resources, the production time of mines has been extended, mining difficulty has gradually increased, resource stocks have gradually shrunk, and mineral resources have become increasingly depleted, especially those mineral resources that are easy to grind and select are now few and far between. . The distribution of mineral resources in Northeast China is mainly concentrated in Liaoning Province, with reserves reaching 10 billion tons. Anshan-type iron ore deposits in Liaoning Province are the most important i...

Claims

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Application Information

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IPC IPC(8): B03B7/00B03B9/00B03C1/02B03C1/30
CPCB03B7/00B03B9/00B03C1/02B03C1/30
Inventor 刘研宋万强
Owner LIAONING INST OF SCI & TECH