Ruixing flotation automatic dosing machine-process factors that interfere with the flotation process

Flotation automatic dosing machine selects particle size

All physical beneficiation methods are based on particle screening of different types of minerals based on different types and properties of the minerals. Firstly, it requires the monomer dissociation of the selected minerals. Secondly, because the methods of beneficiation are different, the particularly suitable separation particle sizes are also different. They are all the same. The particle size of flotation must not exceed the upper limit of the maximum flotation particle size. Various minerals have different densities, and their upper limit of flotation particle size are also different. For example, the upper limit of particle size for flotation of sulfide minerals is generally 0.3mm. For minerals with low density such as sulfur, graphite, coal, etc., the flotation particle size can reach more than 1 mm. Particles that are too fine (such as less than 5 μm) cannot be flotated. Medium particle size is easy to flotate. Therefore, grinding and flotation workers can obtain The graded overflow fineness is often measured.

Flotation automatic dosing machine coarse particle flotation

The reason why the ore entering flotation is often too coarse-grained may be because the design capacity of the grinding machine is insufficient, and the production plan is constantly rising. It may also be that the classification efficiency of the hydrocyclone cannot be accurately controlled by the classification equipment, and the classification The product is "rough".

Coarse flotation indicators are usually not very good for the following reasons:

(1) Useful minerals and gangue minerals are not fully separated into individual entities;

(2) The movement of coarse particles in the slurry encounters turbulent oscillations, causing them to fall off from the foam.

In order to select good coarse particles, conditions suitable for coarse particle flotation can be created, such as:

(1) There is enough collector to form good hydrophobicity;

(2) Increase the amount of aeration to generate larger bubbles;

(3) Under the condition of ensuring the stability of the slurry surface, there is not too strong stirring or rising slurry flow;

(4) Choose a relatively high concentration to increase the buoyancy of the slurry;

(5) Carefully designed foam tanks discharge foam in a timely manner;

(6) The corners of the tank of the flotation automatic dosing machine have few dead corners, which can reduce the coarse sand sinking tank;

(7) In individual cases, select a flotation machine suitable for coarse particle flotation. For example, a shallow tank with a grid plate, a flotation machine with moderate upflow, and foam separation flotation, boiling layer flotation, and table flotation are used. Equipment and methods such as particle flotation.

Fine mud flotation

The so-called fine (ore) mud usually refers to the fine particle size less than 1810μm, but for different factories and mines, different upper limits are often drawn due to ore types or common equipment performance limitations. Fine mud flotation is flotation This is a problem that the industry attaches great importance to. Because fine mud has three major properties that are not conducive to flotation, that is, the mass of a single particle of fine mud is small, the specific surface area is large (the specific surface area per unit mass of mineral particles is large), and the surface bond force is unsaturated. .This results in low grade flotation concentrate, low recovery rate and high consumption of chemicals.

(1) The effect of a small mass is: the small volume is less likely to collide with the bubbles; the smaller the mass, the smaller the movement. When colliding with the bubbles, it is not easy to overcome the resistance of the hydration layer between the mineral and the bubbles, and cannot adhere to the On the bubbles; the fine mud that is difficult to float can also prevent coarse particles from adhering to the bubbles; it is light in weight and sinks slowly in the foam layer of the slurry, making the slurry and foam sticky, causing the concentrate to be of low quality.

(2) The effect of the large specific surface area of ​​the flotation automatic dosing machine is that it will absorb a large amount of chemicals when it is in the slurry, destroying the normal