Since 1898, appeared full of oil flotation machine, early 20th century by flotation as a gas, liquid and solid three-phase interface technology division of mineral matter since, it has been nearly 90 years of history, with the development of flotation technology, The flotation machine has evolved and has replaced dozens of different types of flotation machines. The initial full oil flotation machine, gas flotation machine, vacuum flotation machine, surface flotation machine and pure mechanical stirring MS flotation In the 1930s, mechanically aerated air suction flotation machines such as the Frental (FW), the Akitel (AG), and the Fager Gulin (FAG) appeared. Mikhanopur flotation machines are widely used in the Soviet Union and Eastern European countries, and there are nearly one hundred flotation machines in the world. However, the most popular in the flotation is the lower aspirating mechanical agitation flotation machine. 1. The structure of the air stirring mechanism of the XJM-4 flotation machine and the characteristics of the flotation machine. XJK series flotation machine XJM-S flotation machine XJK series flotation machine XJX-TA flotation machine
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Before the liberation of our country had no option coal flotation plant in 1956 established the first flotation plant in Didao Coal Preparation Plant, since 1965, China began to develop flotation machine is suitable for China's national conditions, and has successfully developed XJM-4, XPM-4, XJX-Z8 and XJX-T12 flotation machines have been widely used in coal preparation plants and have achieved good results. According to statistics from 1979, China's self-designed XJM-4 flotation machine accounted for 34% of domestic flotation machines, breaking the situation of using and copying foreign flotation machines. And the auxiliary equipment matched with the flotation machine, such as the mixing drum, has also been developed accordingly, and the slurry preparation device and the slurry pretreatment device have been developed to improve the effect of the slurry adjustment.
Structure: 1, stator; 2, set of barrels; 3, bearing seat; 4, intake pipe; 5, adjustment cover; 6, adjustment piece; 7, impeller; 8, hollow shaft; 9, pulley. 
Features:
1. The layered umbrella-shaped impeller stator group is used as an aeration stirring mechanism to simultaneously perform the functions of suction, suction and circulation of pulp; strengthen the flotation process, double system suction, easy to adjust; “W†shaped slurry movement, reduce speed and ensure mine The time and liquid level are stable.
2. Use shallow grooves to increase the amount of inflation and reduce power consumption.
3, the use of small diameter and high speed impeller, reduce power consumption and increase the amount of inflation.
Second, the structure of the stator impeller group of the air-mixing mechanism of the XJM-4 flotation machine and the characteristics of slurry and gas movement.
Illustration:
1, stator, 2, impeller, 3, mixing chamber, 4, suction chamber, 5, suction chamber.
Features:
The multi-layered umbrella-shaped impeller stator assembly is used as an aeration stirring mechanism, so that it can simultaneously and indirectly interfere with the inhalation of the slurry, the suction air and the circulating slurry in the suction flotation machine; due to the difference in the taper angle of the upper and lower cone surfaces of the umbrella-shaped impeller, The fresh coal slurry extracted from the lower cone blade, the circulating slurry extracted from the upper blade and the air extracted from the middle impeller are cross-connected, which is very beneficial to the mineralization of the fresh slurry and the circulating slurry, thereby enhancing the flotation process; The cylinder and the hollow shaft simultaneously take in air, increase the aeration amount of the flotation machine, and are easy to adjust; the umbrella-shaped impeller makes the slurry move w-type in the flotation machine, so that the pulp first smashes to the bottom of the tank, and some of the kinetic energy is lost and then rises. Reduces the speed of movement, ensuring sufficient mineralization time and ensuring a stable liquid level.
Third, the structure of the XJX-T12 flotation machine aeration mixing mechanism and the characteristics of the flotation machine.
Illustration:
1, empty shaft, 2, sleeve, 3, inverted cone, 4, impeller, 5, stator, 6, adjustment piece.
Features:
1. Adopt double yaw inclined impeller;
2. The slurry is subjected to a three-dimensional cycle in the flotation tank;
3. Adopt new dosing methods;
4. DC feeding;
5. Add a center feeding pipe;
6. Add a medium mining box.
4. The structure of the stator impeller group of the air-mixing mechanism of the XJX-Z8 flotation machine and the characteristics of slurry and gas movement.
During the rotation of the double-biased inclined impeller, the slurry is alternately squeezed and diffused, which strengthens the contact between the ore particles and the bubbles. The well is beneficial to the precipitation of the microbubbles and strengthens the mineralization of the bubbles, which is extracted from the impeller. The sinusoidal shape of the slurry around it improves the agitation and reduces the impeller speed and power consumption. Due to the action of the inverted cone circulation cylinder and the false bottom, the unmineralized slurry in the middle and upper parts of the flotation tank enters the inverted cone circulation cylinder, and the slurry in the bottom and side walls of the tank enters the impeller again and then circulates. Re-mineralization, this enhanced in-slot circulation route is beneficial to the sorting of coarse-grained materials, avoiding the problem of opening a circulation hole in the sleeve to reduce the aeration volume of the flotation machine and increase the power consumption. Three-dimensional circulation in slurry flotation tank
5. The structure of the XPM-8 flotation machine aeration mixing mechanism and its contribution to the development of flotation equipment .
Illustration: 1, suction pipe, 2, mixing chamber, 3, nozzle, 4, throat, 5, umbrella
Features:
1. Realize microbubble flotation;
2. Increase the circulation amount and increase the processing amount;
3, for the introduction of flotation equipment gas has made a powerful attempt, on this basis, the development of the flotation cyclone, flotation column and flotation bed are borrowed from the inflation method.
6. Flotation column structure and working characteristics of flotation column.
Illustration: 1, aerator, 2, lower body, 3, upper body, 4, intermediate cylinder, 5, wind chamber, 6, feeder, 7, tailings tube
Job characteristics:
(1) The sorting selectivity is higher because during the sorting process, the ore particles and bubbles are convectively moving, which weakens the chance that the gangue adheres to the bubble and in the center of the bubble; since there is no moving part, floating The degree of turbulence in the selected column is relatively low, and the foam layer is relatively thick, which is beneficial to the secondary enrichment due to the merger of bubbles in the foam layer;
(2) Suitable for flotation of fine-grained and fine-grained materials, flotation to the middle of the bubble is formed by compressed air through the microporous aerator, its suitable diameter is small, according to the non-inertial collision of fine particles and bubbles The mechanism is beneficial to the sorting of fine grain materials;
(3) Saving the amount of the agent, especially the foaming agent. The foam layer in the flotation column is thick, actually a foam column. The bubbles are not as dense as in a mechanical agitation flotation machine. The foaming agent is mainly used to control the size of the bubbles, so the amount can be smaller;
(4) Simple structure, easy manufacture, small floor space, convenient maintenance, easy operation and power saving;
(5) The movement state of the slurry is generally reversed movement of the slurry and air bubbles. The actual slurry is up and down in the column, the movement state is complicated, and the control is not good; the operation is extremely unstable, and the flotation effect is certain. influences;
(6) The aerator has a very small aperture and is prone to blockage and failure. After the blockage, the uniformity of the bubbles in the flotation column is lowered, which affects the sorting effect;
(7) The recovery rate of coarse material is low, especially the material of +28 mesh. Under normal circumstances, when sorting by flotation column, the yield of clean coal is lower, but the quality of clean coal is better.
Type and function of flotation equipment
In order to achieve the separation between the ore particles, the mineral surface must have different wettability, and the quantity and quality of the foam to meet the needs, and there should be suitable mechanical equipment to separate them into products of different nature and quality. The device is a flotation machine. The flotation machine is an important device for implementing the flotation process. The effect of flotation has a considerable relationship with the performance of the flotation machine in addition to the effects of chemicals and process. To this end, countries have done a considerable amount of work in improving and developing flotation machines.