During the flotation process, the ups and downs of minerals are almost independent of mineral density. Such as brass and mineral quartz, the former density of 4.2, which is 2.68, but the heavy mineral chalcopyrite readily float, but quartz settle to the bottom. It has been found that the floatability of minerals is related to the affinity of the multi-tank flotation machine. Any mineral that has a high affinity with water and is easily wetted by water is difficult to adhere to bubbles and is difficult to float. Minerals that have low affinity with water and are not easily wetted by water are easy to float.
Flotation is the same as other mineral processing methods. It is necessary to prepare the materials before the sorting, that is, the ore should be graded by grinding to achieve the concentration fineness suitable for flotation. In addition, there are several basic operations for flotation:
1. Adjustment of pulp and addition of flotation reagents. The purpose is to cause the difference in the surface properties of the mineral, that is, to change the wettability of the mineral surface, to adjust the selectivity of the mineral surface, so that some mineral particles can adhere to the gas, while others can not adhere to the air bubbles.
2. Stir and cause a lot of air bubbles. By means of the aeration stirring action of the flotation machine, the air in the slurry is dispersed to form a large number of bubbles, or the air dissolved in the slurry is formed into a micro-saturated state.
3. Mineralization of bubbles. The ore particles selectively attach to the bubbles, which is the most basic behavior in the flotation process.
4. Flotation is a beneficiation method based on the difference in mineral wettability of minerals. The nature of minerals that are easy to float and difficult to float is generally referred to as the floatability of minerals. Flotation is the use of the difference in the floatability of minerals to sort minerals. In the modern flotation process, the application of the flotation agent is particularly important, because after the flotation agent treatment, the floatability of the mineral can be changed, so that the mineral to be floated can selectively adhere to the bubble, thereby achieving the purpose of beneficiation.
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