In the process of desulfurization gypsum production, the size of gypsum is small and its gradation is poor. Particle shape, particle size and specific surface area affect the water consumption of standard consistency to a certain extent. Small particle size means large contact area with water and rapid formation of saturated solution, but small particle size means increased water consumption for standard consistency (O.7-0.85 D type hemihydrate gypsum). In addition, the strength of hardened gypsum products will be reduced if the hydration rate is too fast and the dihydrate gypsum crystal is not uniform.

　　此外，脱硫石膏粒径较小，平均粒径相对集中，主要为40.609m。因此，脱硫灰泥加水后的流变性好，颗粒偏析分层现象严重，产品容重较大。

　　In addition, the particle size of desulfurized gypsum is small, and the average particle size is relatively concentrated, mainly 40.609m. Therefore, the fluidity of desulfurized mortar is good after adding water, the segregation and stratification of particles are serious, and the bulk density of the product is large.

　　高含水率:脱硫石膏的游离含水率一般为10%。15%，远远高于天然石膏，这使得运输和储存变得困难。

　　High water content: the free water content of desulfurized gypsum is generally 10%. 15% is much higher than natural gypsum, which makes transportation and storage difficult.

　　石膏粉的作用:

　　The function of gypsum powder:

　　1. 墙水准:

　　1. Wall Level:

　　一般用石膏粉装修做基层处理，比如填补缝隙、阴阳角直移、粗糙的空白房间墙面次腻子求同。石膏的附着力好，不易产生脱落现象，平时使用进行墙面查找，一般不是直接使用石膏粉，也可以在里面加入滑石粉，否则施工会不太方便。

　　General use gypsum powder decoration to do basic treatment, such as filling gaps, Yin and Yang angle straight shift, rough blank room wall for the first time putty similarity. Gypsum has good adhesion and is not easy to fall off. Usually it is not used directly to find the wall surface. It can also be added with talcum powder. Otherwise, the construction will be inconvenient.

　　2. 石膏水泥生产:

　　2. Gypsum cement production:

　　添加适量的活化剂可生产硬石膏水泥或胶结材料，适用于软土地基加固、墙体涂装、力学模型、隧道支护及纤维压板的生产。

　　Adding appropriate amount of activator can produce anhydrite cement or cementing material, which is suitable for soft soil foundation reinforcement, wall coating, mechanical model, tunnel support and production of fiberboard.

　　因为大多数的脱硫是湿的,所以不可避免的含有大量的水,它给脱硫石膏的生产带来很大的影响,如干燥需要大量的能源消耗,也需要某些地方堆积和预干燥,因为脱硫石膏,在积累的过程中,因为风会带来粉尘污染;在胶带运输过程中，石膏粉会附着在胶带和辊筒上，给胶带和辊筒的正常运行带来很大的困难，需要经常清洗，导致生产不断进行。脱硫石膏作为生产石膏建筑材料的原料，其游离水含量一般要求低于10%，但仍高于天然建筑石膏。

　　Because most desulphurization is wet, it inevitably contains a lot of water, which has a great impact on the production of desulphurization gypsum. For example, drying requires a lot of energy consumption, but also requires some places to accumulate and pre-drying, because desulphurization gypsum, in the accumulation process, because the wind will bring dust pollution; in the process of belt transportation, gypsum powder will adhere to tape and rollers, to the glue. Normal operation of belt and roller brings great difficulties and needs frequent cleaning, which leads to continuous production. Desulphurization gypsum is used as raw material for gypsum building materials. The free water content of desulphurization gypsum is generally less than 10%, but still higher than that of natural building gypsum.