1、 Similarities of 4 types of gypsum powder

这几种石膏粉大多有氧化钙、三氧化二硫、氧化镁、氧化钾等成分组成。另外，石膏粉与天 然石膏粉的主要矿物相、转化后的形态、7种变体物化性能皆相同；水化动力学和凝结特征也基本相同。而脱硫石膏又与天 然石膏相同，都无放射性，也不危害健康。

These gypsum powders are mostly composed of calcium oxide, sulfur trioxide, magnesium oxide, potassium oxide, and other components. In addition, the main mineral phases, transformed forms, and physical and chemical properties of gypsum powder and natural gypsum powder are the same; The hydration kinetics and condensation characteristics are also basically the same. And desulfurization gypsum, like natural gypsum, is non radioactive and does not pose a health hazard.

脱硫石膏粉、天然石膏、磷石膏的相同及不同之处

The similarities and differences between desulfurization gypsum powder, natural gypsum, and phosphogypsum

二、4种石膏粉的不同点

2、 Differences in 4 types of gypsum powder

1、脱硫石膏粉和磷石膏粉的区别

1. The difference between desulfurization gypsum powder and phosphogypsum powder

这两种石膏粉中，三氧化硫含量比较多，占据41%。其次，占比含量从多到少就是氧化钙、氧化镁、氧化铝、三氧化二铁了。不过磷石膏粉中不含氧化钠、氧化钾。

Among these two types of gypsum powder, the content of sulfur trioxide is relatively high, accounting for 41%. Secondly, the proportion of calcium oxide, magnesium oxide, aluminum oxide, and iron oxide ranges from high to low. However, phosphogypsum powder does not contain sodium oxide or potassium oxide.

2、脱硫石膏粉和天 然石膏粉的区别

2. The difference between desulfurization gypsum powder and natural gypsum powder

石膏粉生产厂家表示，脱硫石膏粉中含量较多的是三氧化硫，而天 然石膏粉中氧化钾的含量比较多。另外，两者原始物理状态不一样。前者是以单独的结晶颗粒存在的，而后者则是粘合在一起的块状。其次，在杂质成分上也有所差异，如此，在脱水特性、易磨性，煅烧后的熟石膏粉在力学性能等宏观特征上都有所不同。

The gypsum powder manufacturer stated that the desulfurization gypsum powder contains more sulfur trioxide, while natural gypsum powder contains more potassium oxide. In addition, the original physical state of the two is different. The former exists as individual crystalline particles, while the latter is a cohesive block. Secondly, there are also differences in impurity composition, resulting in differences in dehydration characteristics, grindability, and macroscopic characteristics such as mechanical properties of calcined gypsum powder.

3、脱硫石膏粉与半水石膏的区别

3. The difference between desulfurization gypsum powder and hemihydrate gypsum

前者是烟囱脱硫的副产品，而半水石膏是石膏粉在不同温度下脱水形成的半水石膏，根据不同的煅烧方式可以分为α半水石膏和β半水石膏。

The former is a by-product of chimney desulfurization, while hemihydrate gypsum is a hemihydrate gypsum formed by dehydration of gypsum powder at different temperatures. According to different calcination methods, it can be divided into α Hemihydrate gypsum and β Hemihydrate gypsum.