The calcination of gypsum powder can be divided into desulfurized gypsum, phosphogypsum, etc. according to the raw materials, there are several corresponding calcination processes for different raw materials, some of which are only suitable for natural gypsum, and some of which are only suitable for chemical gypsum.

天然石膏的煅燒有的工藝是先燒后磨，如回轉窯煅燒，可以先煅燒顆粒，然后再磨；有的工藝是先磨后燒，如連續炒鍋、錐型炒鍋、連續回轉窯、間歇回轉窯、沸騰爐等，國內都在大量的應用；還有就是磨燒一體機，如皮特磨，隨研磨隨煅燒。

Some calcination processes of natural gypsum are burning first and then grinding, such as calcining in rotary kiln, calcining particles first and then grinding; Some processes, such as continuous frying pan, conical frying pan, continuous rotary kiln, intermittent rotary kiln and fluidized bed furnace, are widely used in China; There is also a grinding and burning machine, such as Pitt mill, with grinding with calcination.

化學石膏的煅燒工藝和天然石膏有些區別，主要是因為化學石膏大部分都含游離水，有些煅燒工藝可以烘干煅燒一體完成，有些工藝烘干和煅燒是分開的，也就是所謂一步法和兩步法。

There are some differences between the calcination process of chemical gypsum and natural gypsum, mainly because most of chemical gypsum contains free water. Some calcination processes can be completed by drying and calcination, while some processes are separated, that is, one-step and two-step.

石膏粉的煅燒按煅燒溫度區分可以分為低溫慢速煅燒和高溫快速煅燒，隨著科技進步的發展和其他行業的引入，國內涌現出很多類型的設備，低溫煅燒設備老一些的如連續炒鍋、錐型炒鍋、沸騰爐，新上市的如FC煅燒爐；高溫快速煅燒國內是北京一熱從國外引進的錘式煅燒機，國內后期出現的司德爐，新式的錘式煅燒機。國內外還有很多介于高溫和低溫之間的一些設備。

According to the calcination temperature, the calcination of gypsum powder can be divided into low-temperature slow calcination and high-temperature fast calcination. With the development of science and technology and the introduction of other industries, many types of equipment have emerged in China. The old low-temperature calcination equipment, such as continuous frying pan, cone-shaped frying pan and fluidized bed furnace, and the new listed equipment, such as FC calciner; High temperature rapid calcination is a hammer type calciner imported from abroad by Beijing first heat Group Co., Ltd. in China, a new type of hammer type calciner appeared in the later stage of China. There are many equipments between high temperature and low temperature at home and abroad.