(2) Variability: Potash ore is easy to change. In the process of mineralization, the influence of surface water or groundwater with different concentrations or compositions, or the influence of temperature changes, may make them change from one mineral to another, which is one of the reasons why the mineral composition of potash deposits is more complicated. This changeable feature certainly puts forward a subject that needs special attention for the development and utilization of potassium salt. The change of temperature, the composition of mother liquor, the amount of water brought in, etc. all have their particularity. (3) Similarity: The physical properties of potash ores are very similar, the density is less than 3g/cm, the hardness is less than 4, and the colors are similar, so it is difficult to identify them with naked eyes.
(4) It is hygroscopic, and most potash ores are hygroscopic and deliquescent. Both the raw ore mined and the finished product obtained after processing have this characteristic. Therefore, moisture-proof and anti-caking measures should be taken during transportation and storage. According to the degree of hygroscopicity reduction, the main potassium minerals can be arranged as follows: carnallite, anhydrous potassium magnesium alum, potassium magnesium alum and potassium salt.
(5) Complex composition: when potash minerals form deposits, they are often associated with halite, and sometimes the content of halite often exceeds that of potash; Secondly, it always contains some impurities, such as sulfate, carbonate and clay. Therefore, in the process of processing and utilization, it brings some difficulties to separation, which leads to complex technological process and affects product quality.