Introduction to the structure, principle and characteristics of jjf large flotation machine

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Nowadays, large-scale, automated and energy-saving flotation machines have become the development trend of the mining industry. The flotation machine is one of the important equipment for the separation of mineral raw materials in the field of mineral processing. It can be widely used in the separation operations of various non-ferrous metals, ferrous metals and non-metal mining enterprises, and the equipment performance is reliable.

The current specifications and models of jjf flotation machines can reach 130m³. The jjf flotation machines of this specification are in the original equipment. On the basis of the special laws of fluid mechanics of large-scale flotation machines, the collision, adhesion, and shedding processes between minerals of different particle sizes and foam in the tank were analyzed, and how to improve gas dispersion while ensuring bubbles was studied. Mix evenly with the pulp. As a result, a modified large-scale jj flotation machine equipment was developed. Let’s take a look at the structure and working principle of this large-scale flotation machine!

Structure composition of large JJF flotation machine

The main structure of large JJF flotation machine consists of tank body, main shaft, bearing, impeller, cover plate, stator, false bottom, It is composed of flow guide tube, dispersion cover, bubble pushing cone and other parts.

jjf flotation machine tank

At present, large-scale mechanical stirring flotation equipment at home and abroad are Using a cylindrical tank, its symmetry can improve the dispersion of aeration and the smoothness of the slurry surface, which can improve the efficiency of the flotation machine. In order to avoid the accumulation of ore at the bottom of the tank, the JJF large-scale flotation machine designs the bottom of the tank into a conical bottom shape, which facilitates the movement of coarse and heavy mineral particles to the center of the tank for return to the impeller area for recirculation, and reduces the short circuit of the slurry. In addition, baffles are added to the flotation tank to improve the stability of the slurry surface, prevent the slurry from spinning in the tank, and ensure a favorable environment for flotation.

jjf flotation machine foam tank

In the design process of the flotation machine, the characteristics of the foam should be taken into consideration. Generally, The volume and foam surface area of a large flotation machine are relatively large, and the foam transportation distance is relatively long; local foam stagnation is also a problem that should be considered in the design process. If the foam in the middle is stagnant, the foam near the edge of the foam tank will be It is easy to flow, and the overflowing foam is new white foam, which will have a certain impact on the indicator.

The design of this jjf large-scale flotation machine adopts a peripheral overflow method and a conical bubble pusher to accelerate the flow of foam. Among them, the peripheral overflow method uses the natural flow direction of the slurry to accelerate the overflow of foam and increase the flotation speed.

jjf flotation machine impeller

The impeller is an important part of the mechanical agitation flotation machine. It is the key to realizing the flotation operation. The functional component is mainly responsible for slurry mixing, slurry circulation, self-priming air and dispersing air. Its impeller structure adopts a star impeller design and is equipped with radially chamfered blades.

Working principle of large jjf flotation machine

jjf flotation machine Machine selectionPrinciple: Start the motor to drive the impeller of the flotation machine to rotate, causing the slurry near the impeller to generate negative pressure (the impeller cavity forms a turbine). The negative pressure causes the gas-liquid interface to expand upward to the guide tube, and in the center of the vortex A negative pressure zone is formed. Since the vertical cylinder is connected with the surrounding atmosphere, the negative pressure generated by the vortex causes air to be sucked into the vertical cylinder and the center of the impeller, completing the suction effect.

At the same time, the slurry enters the space between the impeller blades from the bottom of the tank through the guide tube, and mixes with the air sucked into the center of the impeller. . The three-phase mixture leaves the radial impeller blades with large tangential and radial momentum. When passing through the channel on the stator, the tangential part changes to the radial direction, and a local turbulence field is generated to further mix the air and slurry.

When the three-phase mixture leaves the stator and enters the flotation area, the flotation separation process is completed in this area. The mineralized bubbles rise to the foam area, and the remaining slurry returns downward to the bottom of the tank and enters again. cycle.

The above is an introduction to the structure and working principle of the large jjf flotation machine. If you want to know more about the jjf flotation machine model and its equipment quotation, you can consult Xinhai customer service, or direct hotline consultation: 15311826613!