You can heat the raw salt in a microwave oven or casserole, or you can directly pour the raw salt into the casserole and heat it in a microwave oven.

Raw salt is the crystallization of sea water or brine in salt wells, salt ponds and salt springs after frying, that is, natural salt, which is unprocessed large-grain salt. The main component is sodium chloride, but it is easy to deliquesce in the air because of impurities such as magnesium chloride, so pay attention to humidity when storing.