The difference between gravity separation and flotation beneficiation process

2022-03-30

Introduction to gravity beneficiation

First, the raw materials should be crushed and ground into fine particles with a fineness of less than 0.2mm, and then the flotation agent is added and stirred evenly in the mixing tank.

The re-selected raw materials have to go through the process of crushing, screening and grinding, in order to meet the feeding particle size of the re-selection equipment.

The re-selected materials should be washed with water flow to remove excess sediment, stone powder, etc. on the ore, so as to avoid mixing into the re-selected concentrate and affect the ore grade.

Re-selection and grading equipment
Jig, Shaker, Chute

The gravity separation equipment commonly used in the gravity separation method includes jig, shaking table, chute, etc., using the different settling velocities of mineral particles with different specific gravity in the medium (usually water, air, heavy liquid or suspension), the useful minerals are separated. and associated ore particles.

Introduction to flotation beneficiation

Grinding can separate the useful ore particles embedded in the ore from the associated gangue as much as possible; the function of the flotation agent is to enhance the difference in floatability between the useful minerals and the associated gangue; stirring is to make the agent and the associated gangue separate. The ore particles are fully functional.

The adjusted pulp is filled into the flotation machine, and the flotation machine produces a large number of bubbles in the pulp by means of mechanical stirring or filling with air.

After the action of flotation reagents, the hydrophobicity of useful mineral particles is more obvious, and it is easier to attach to the air bubbles, while other minerals with hydrophilicity remain in the pulp, completing an important step in mineral separation.

The ore particles attached to the bubbles float to the surface of the pulp with the bubbles, and then are scraped out by the rotating scraper, which is the concentrate we want, and the product left in the pulp is tailings.