1. The results showed that carnallite dissolved in the water was a process that potassium chloride dissolved firstly and then KC1 crystallization appeared when certain supersaturation of KC1 was got.

2. The separation of calcium sulfate from water-mining carnallite by flotation for the production of KCl from Chaerhan Salt Lake was studied.

3. The method of separating sodium chloride from carnallite in chaerhan salt lake by using QHS-2 sodium chloride collector was introduced.

4. In the Project area of 1300 km2 Feuga et al in october 2005, reported total K20 resources (carnallite and sylvite) of 30 billion tons.

5. The Process Producing carnallite, in which brine is add to container for removal to sodium rather than to trench salt pan and solar salt pan used before, has came into use.

6. Kinetic equations proved that the crystallization of ammonium carnallite at low temperature was under the control of mononuclear crystal growth.

7. Solar pond carnallite was dewatered to reduce the cost and freight.

8. The crystallization kinetic equations at low temperature are established with solubility data of ammonium carnallite.

9. It's a economical way to make compound fertilizer named Potassium Phosphate, Using carnallite and wet phosphoric acid by double decomposition reaction.