石膏粉的主要成分是含水的硫酸钙，大部分都呈白色的透明晶体，因有无结晶水分为“软石膏”和“硬石膏”。

The main component of gypsum powder is hydrated calcium sulfate, most of which are white transparent crystals. Because of the presence or absence of crystal water, they are "anhydrite" and "Anhydrite".

作为一种墙面基层处理材料，石膏粉又叫腻子粉，主要用来砌墙体，勾缝，墙面找平等。同时石膏粉可以作为混凝土膨胀剂、抗裂剂、自流平砂浆的主要原材料，特种水泥生产中用作复合矿化剂等。

As a wall base treatment material, gypsum powder, also known as putty powder, is mainly used for wall masonry, pointing, and wall leveling. At the same time, gypsum powder can be used as the main raw material for concrete expansion agent, crack resistance agent, and self-leveling mortar, and as a composite mineralizer in the production of special cement.

济南石膏粉成分：

Composition of Jinan gypsum powder:

CaSO4˙2H2O

CaSO4 ˙ 2H2O

晶体化学：

Crystal chemistry:

理论组成(wB%)：CaO 32.5，SO3 46.6，H2O+ 20.9。成分变化不大。常有粘土、有机质等机械混入物。有时含SiO2、Al2O3、Fe2O3、MgO、Na2O、CO2、Cl等杂质。

Theoretical composition (wB%): CaO 32.5, SO3 46.6, H2O+20.9. The composition changes little. There are often mechanical mixtures such as clay and organic matter. Sometimes it contains impurities such as SiO2, Al2O3, Fe2O3, MgO, Na2O, CO2, Cl, etc.

生石膏粉的成分

Composition of raw gypsum powder

生石膏为二水硫酸钙（Ca〔SO4〕·2H2O），又称二水石膏、水石膏或软 石膏，理论成分CaO32.6%，SO346.5%，H2O+20.9%，单斜晶系，晶体为板状，通常呈致密块状或纤维状， 白色 或灰、 红、褐色，玻璃或丝绢光泽，摩氏硬度为2，密度2.3g/cm3；

Raw gypsum is calcium sulfate dihydrate (Ca [SO4] · 2H2O), also known as gypsum dihydrate, hydrogypsum or anhydrite, with theoretical composition of CaO32.6%, SO346.5%, H2O+20.9%, Monoclinic crystal system, crystal is plate shaped, usually dense block or fiber shaped, white or gray, red, brown, glass or silk luster, Mohs hardness of 2, density of 2.3g/cm3;

硬石膏粉的成分

Composition of Anhydrite powder

硬石膏为无水硫酸钙（Ca〔SO4〕），理论成分CaO41.2%，SO358.8%，斜方晶系，晶体为板状，通常呈致密块状或粒状，白、灰白色 ，玻璃光泽，摩氏硬度为3～3.5，密度2.8～3.0g/cm3。两种石膏常伴生产出，在一定的地质作用下又可互相转化。

Anhydrite is anhydrous calcium sulfate (Ca [SO4. Two types of gypsum are often produced together and can be transformed into each other under certain geological conditions.

石膏粉的种类

Types of gypsum powder

1、石膏粉如果根据其物理成分来区分的话，可以分为：磷石膏粉、脱硫石膏粉、柠檬酸石膏粉和氟石膏粉等。

1. Gypsum powder can be divided into Phosphogypsum powder, desulfurized gypsum powder, citric acid gypsum powder and fluorogypsum powder according to its physical composition.

2、石膏粉如果根据其颜色不同来区分的话，可以分为：红石膏粉、黄石膏粉、绿石膏粉、青石膏粉、白石膏粉、蓝石膏粉、彩色石膏粉等。

2. If gypsum powder is distinguished based on its color, it can be divided into: red stone gypsum powder, yellow stone gypsum powder, green gypsum powder, blue stone gypsum powder, white gypsum powder, blue gypsum powder, color gypsum powder, etc.

3、石膏粉如果根据其不同的物理特征来区分的话，可以分为：白云质石膏粉、粘土质石膏粉、绿泥石石膏粉、雪花石膏粉、滑石石膏粉、含砂质石膏粉和纤维石膏粉等。

3. If gypsum powder is distinguished according to its different physical characteristics, it can be divided into: dolomite gypsum powder, clay gypsum powder, Chlorite group gypsum powder, Alabaster powder, talcum gypsum powder, sandy gypsum powder and fiber gypsum powder.

4、石膏粉如果根据其使用范围及用途来区分的话，可以分为：建材用石膏粉、化工用石膏粉、模具用石膏粉、食品用石膏粉和铸造用石膏粉等。

4. If gypsum powder is distinguished based on its scope of use and purpose, it can be divided into: gypsum powder for building materials, gypsum powder for chemical industry, gypsum powder for molds, gypsum powder for food, and gypsum powder for casting.

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