Flotation Machine

Flotation machine in industrial production is usually based on experience to set design operation parameters. Although some domestic and foreign scholars have carried out some research on this aspect, the hydrodynamic parameters of the flotation machine are not enough. For the large flotation machine, the special requirements for the fluid dynamics of the large flotation machine are mainly studied in the theory.

Flotation Machine

Large Flotation Machine Design Principles

At present, the flotation machine in industrial production is usually based on experience to set design operation parameters. Although some domestic and foreign scholars have carried out some research on this aspect, the hydrodynamic parameters of the flotation machine are not enough. For the large flotation machine, the special requirements for the fluid dynamics of the large flotation machine are mainly studied in the theory. Flotation cells in different size fractions of minerals and bubble collision, adhesion, shedding process and the influence of these processes causes and how to prevent the flotation circuit, improve the gas dispersion and ensure bubbles and pulp evenly mixing aspects as the focus of the study. How to realize the uniform stirring of mineral in the large flotation machine. This will not only make the ore particles suspended and air bubbles evenly distributed throughout the flotation cell, but also avoid the excessive disturbance of liquid surface. This is one of the outstanding problems in the design of the large flotation machine.

By exploring the special rules of large-scale flotation machine fluid dynamics to determine the flotation machine inside the particle size of minerals and bubble collision, adhesion, shedding process and the influence of these processes, and accordingly proposed the design principles of large flotation equipment.

  • 1, To ensure energy charge of flotation cell into enough air, the air in the pulp fully dispersed into moderate size of the bubbles, guarantee that there is enough gas liquid interfacial separation groove, increase the mineral particle and bubble collision, contact and adhesion of opportunity;
  • 2, Impeller and stator system generated by fluid dynamics to meet requirements of flotation kinetics, in order to facilitate the formation of coarse mineral and bubble aggregate and the smooth surface, to establish a relatively stable zone is separated from the peace and stability of the foam layer, reduce ore particles off the opportunity;
  • 3, The impeller stirring force is moderate, flow unimpeded, bottom not with sand, and coarse particle suspension fully guaranteed;
  • 4, The stator should be conducive to the impeller rotation of the mine flow into radial flow, forming fine air bubbles, reducing energy consumption;
  • 5. Appropriately increasing the groove depth, increasing the distance between the bubbles, so as to increase the opportunity of the collision between the particles and the bubble;
  • 6, The aeration quantity is easy to adjust, the operation simple and convenient;
  • 7, Can be opened under the load, parking;
  • 8, Through the control to gas, to the medicine, the water, the regulation level, can quickly adjust the flotation process, realize the automatic control.

Flotation Machine Working Principle

When the motor drives a main shaft to drive the impeller rotates, the impeller cavity of the pulp by the action of centrifugal force to throw around, an impeller cavity negative pressure is generated, to mine, middlings and air respectively by ore feeding pipe, middling pipe and a suction pipe suction device on the impeller cavity. At the same time, the lower part of the impeller of slurry through the impeller cone disk center holes sucked into the impeller chamber, by the division plate barrier and the centrifugal force, the pulp is thrown to the horizontal direction, when the slurry and air along the radial outward movement beyond segmentation disc diameter, gas-liquid mixed, ran after the passage between the vane cover around to throw, which part of the gas liquid solid mixtures after leaving the flat channel, to the upper part of the movement of flotation cell in flotation process, foam product was scraped off. And the other part of the pulp to the lower part of the impeller motion, by the impeller suction again into the impeller cavity, the formation of circulating slurry. The pulp cycle contributes to resuspension of coarse particles of minerals, can minimize the deposition of sand in the lower part of the flotation tank.

Technical Data

Application

Flotation machine are widely used in medium and soft mineral &rock materials, such as limestone, feldspar, calcite, talc, barite, clay, tombar thite, kaolin, gypsum, and graphite, etc.

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