The processing method of gypsum is

The processing method of gypsum is open-air calcination.

When drugs are calcined, the method of not isolating air is called open calcination, which is suitable for mineral drugs, shellfish and fossil drugs. Fossils and shellfish drugs should not be calcined by the latter two methods. When calcining, the size of the drugs should be graded, and the drugs should be evenly heated until the inside and outside are consistent and "stored" and calcined at one time. Second, the calcination quenching method is to calcine the drug to red and transparent by open calcination method, and immediately put it into the specified liquid auxiliary material for quenching, which is called calcination quenching method.

When drugs are calcined, the method of not isolating air is called open calcination, which is suitable for mineral drugs, shellfish and fossil drugs. Fossils and shellfish drugs should not be calcined by the latter two methods. When calcining, the size of the drugs should be graded, and the drugs should be evenly heated until the inside and outside are consistent and "stored" and calcined at one time. Second, the calcination quenching method is to calcine the drug to red and transparent by open calcination method, and immediately put it into the specified liquid auxiliary material for quenching, which is called calcination quenching method.

Open calcination method:

When drugs are calcined, the method of not isolating air is called open calcination, which is suitable for mineral drugs, shellfish and fossil drugs. Calcination methods include furnace mouth calcination, open hearth calcination and reverberatory furnace calcination. The latter two methods have high calcination temperature and high yield, but they are not resistant to high temperature. Fossils and shellfish drugs should not be calcined by the latter two methods. When calcining, the size of the drugs should be graded, and the drugs should be evenly heated until the inside and outside are consistent and "stored" and calcined at one time. For minerals mainly containing mica, asbestos and timely minerals, the calcination temperature should be high and the time should be long.

Alum:

It mainly contains potassium aluminum sulfate [kal (SO4) 2.65438+2h02o], and there are two specifications of alum and dried alum. Alum detoxifies and kills insects, clearing away heat and phlegm, eliminating dampness and relieving itching; Detoxification and itching relief for external use; The acidity and coldness of dried alum are reduced, the vomiting effect is weakened, and the functions of convergence, granulation, hemostasis and antisepsis are enhanced. When calcining, it should be thoroughly calcined at one time, without stopping fire or stirring in the middle. The water content of alum is 45.53% according to the crystal water contained in the molecular formula. Alum can be made into dried alum by traditional methods, with a weight loss of 45%. The calcination temperature should be controlled between 180 ~ 260℃.

Concha Haliotidis:

There are concha Haliotidis and calcined concha Haliotidis. Raw concha Haliotidis tends to calm the liver and subdue yang, while calcined concha Haliotidis reduces its salty and cold properties, and has the effect of calming the liver and subduing yang, enhancing convergence and improving eyesight. Concha Haliotidis is required to be calcined to crisp, grayish white or bluish gray, without pearl luster.