Talc is a commonly used chemical product, and some industries need to purify it when using it. Next, let's take a look at how to purify it.
1. Flotation. Due to the natural floatability of talc. Therefore, the hydrocarbon oil collector can be used for flotation. The commonly used collector is kerosene, and flotation oil is used as a foaming agent. The flotation process of talc powder is relatively simple, only one roughing, one sweeping, and 2-4 times of beneficiation are needed to obtain concentrate.
2, photoelectric inspection. Photoelectric sorting is a sorting method using the difference in optical properties of the surface of talc and impurity minerals. The photoelectric sorting machine includes preparation mechanism (mining bin, feeder, belt conveyor), radiation source and detector (sensor), electronic control loop and actuator, etc. In addition, it utilizes the characteristic of talc that emits white fluorescence under ultraviolet irradiation.
3. Hand-selected. Hand selection is selected by hand according to the difference in smoothness of talc powder and gangue minerals. Talc has good smoothness, high grade, and the better the smoothness, it is easy to identify by hand.
4. Magnetic separation. In addition to a certain fineness of talc concentrate is required. It also has a certain degree of whiteness. Due to the presence of dyed iron minerals in the ore, sometimes the above methods are not enough, and magnetic separation is needed to remove iron minerals.
The above is the main content of how to purify talcum powder.
