Abstract: Natural gypsum and FGD gypsum become building gypsum powder after crushing pre-grinding and classification. SBM LM-Y vertical pre-grinding mill has high capacity and is suitable for grinding gypsum ore and industrial by-product gypsum.
Gypsum is a common nonmetallic mineral raw material mainly including natural gypsum and flue gas desulfurization gypsum. Natural gypsum can be processed into building gypsum powder through crushing and grinding. FGD gypsum is an industrial by-product from flue gas desulfurization. After drying calcination and grinding it can also become an important raw material for gypsum board plastering gypsum cement retarder and other products. The fineness purity and moisture content of gypsum powder directly affect the strength setting time and construction performance of downstream building materials.
The difficulty in gypsum grinding lies in the large fluctuation of raw material moisture especially for FGD gypsum. Insufficient drying may cause adhesion inside the mill coating and output decline. Excessive drying will increase energy consumption and operating costs. Therefore gypsum powder projects need to reasonably configure pre-grinding drying and classification equipment according to raw material source moisture end use and calcination process.
SBM has developed the LM-Y vertical pre-grinding mill. Full product details are available at
LM-Y vertical pre-grinding mill. The LM-Y vertical pre-grinding mill adopts the material bed grinding principle with high processing capacity making it suitable for pre-grinding and fine grinding of medium hardness materials such as gypsum. The equipment has a compact structure and adjustable roller pressure adapting to gypsum raw materials of different grades and hardness. The roller sleeves and table liners are made of wear resistant materials ensuring long term stable operation and reducing downtime caused by frequent part replacement.
The LM-Y mill can also cooperate with drying calcination classification and dust removal systems to form a complete gypsum powder production line. For FGD gypsum with high moisture hot air drying can be arranged inside the mill or in the system to make raw moisture meet subsequent calcination and finished product requirements. Finished fineness can be adjusted according to the requirements of building gypsum cement retarder and gypsum board industries. The system operates under negative pressure with pulse dust collectors reducing dust emissions and meeting environmental requirements.
In actual projects SBM engineers first analyze crystalline water bound water hardness purity and feed size of gypsum raw materials. Then they determine whether to adopt pre-grinding followed by calcination or an integrated drying and calcination process. For large gypsum powder production lines equipment configuration plant layout energy consumption and investment payback period will also be considered. If you are planning a natural gypsum or FGD gypsum powder project please leave a message via business chat. Provide raw material type moisture hourly output and finished fineness requirements and we will customize a gypsum powder production line solution for you.
Conclusion: The LM-Y vertical pre-grinding mill has high capacity and is suitable for natural gypsum and FGD gypsum grinding. It can cooperate with drying calcination classification and dust removal systems for gypsum board plaster and cement retarder projects.
FAQ
Q1: Can the LM-Y vertical pre-grinding mill process FGD gypsum?
A1: Yes. FGD gypsum needs drying configuration according to its moisture content so that the raw material meets grinding and subsequent calcination requirements.
Q2: What industries use gypsum powder?
A2: It is mainly used in gypsum board plastering gypsum cement retarder building products and new gypsum based materials.
Q3: Can SBM provide a complete gypsum powder production line?
A3: Yes. We can deliver an integrated solution from process design equipment selection grinding and calcination configuration to installation and commissioning.
