In the beneficiation , the factors affecting flotation beneficiation and magnetic separation beneficiation are still well summarized, which can be seen from the following aspects:
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The factors affecting the flotation machine flotation effect are :
Flotation machine medication: The good effect of the mixed drug is related to the non-uniformity of the mineral surface and the interaction between various agents. The mineral surface properties are not uniform, the degree of oxidation is different, and there may be different activation zones for different collectors . Therefore, the mixed drug may increase the coverage density of the mineral surface collector, thereby improving the flotation effect, and various trapping The co-adsorption produced by the interaction of the agent can also increase the ability of the drug to collect and increase the flotation index.
Bubble characteristics: The size of the bubble has a certain effect on the flotation effect. If the bubble is small, the better the air is dispersed, the more the bubble surface area and its chance of contact with the ore particles are, which is beneficial to the flotation and can improve the flotation index. However, if the bubble is too small, the rate of rise and fall is also small, which is harmful. Therefore, the bubbles should not be too large during flotation, but small is good, but not too small, otherwise it will affect the flotation index and reduce the recovery rate and concentrate quality.
Important factors affecting the magnetic separation effect of magnetic separator:
Slurry concentration: The pulp concentration is an important factor affecting the magnetic separation effect of the magnetic separator. It mainly refers to the overflow concentration of the classifier. If the concentration of the slurry is too large, resulting in too high a sorting concentration, the quality of the concentrate will be seriously affected. Because the concentrate particles are easily covered by finer gangue particles and the package is not separated at this time, they are selected together to lower the grade. If the concentration of the slurry is too small, the concentration will be too low, and the flow rate will increase. The selection will shorten the pairing, so that some small magnetic particles that would have been available should fall into the tailings to increase the grade of the tailings and cause losses. Therefore, the pulp concentration should be adjusted as needed. The adjustment at the magnetic separator is mainly adjusted by the size of the blown water for the mine. However, the most important thing is that the graded overflow concentration must be completed according to the magnetic separation requirements. The maximum concentration of the feed slurry should not exceed 35%, and the control is generally about 30%. It should be determined according to the actual situation.
Feeding particle size: The most important factor affecting the magnetic separation effect of the magnetic separator is the feeding ore size given to the magnetic separation. The thickness of the ore-bearing grain size indicates the degree of separation of the ore monomer, that is, the degree of separation of the magnetic ore particles from the gangue particles. If the ore particle size is small, it means that the mineral monomer has high separation degree and can obtain satisfactory selection index; if the ore particle size is relatively coarse, it means that the mineral is not fully dissociated, the monomer separation degree is not high, and the opposite body is more That is, the magnetic particles and the gangue still have a considerable portion combined. Since the continuous body is also quite magnetic, the selection can be selected for a considerable portion to reduce the concentrate grade. Therefore, it is required that the minerals to be fed into the magnetic separator must sufficiently achieve monomer separation. For the ore with a coarse grain size, as long as the mineral and the gangue have reached the monomer separation, the particle size is not necessarily too fine. Such ore sometimes has a coarser grain size, but the quality of the sorting is not low. The main reason for this is that the ore is densely grained, and the useful mineral and the gangue are separated to some extent.
November 19, 2019