100,000 TPY Desulfurization Gypsum Grinding Production Line in Hubei

Project Overview

A large comprehensive resource utilization enterprise in Hubei invested in an advanced desulfurization gypsum powder production line. The core requirement of the project is to realize stable conversion from dihydrate gypsum to hemihydrate gypsum. After comprehensive comparison, the customer selected the GK1620 Raymond mill from Guilin Mining Machinery, equipped with a rotary kiln to form the combined "calcination-grinding" process. This line can flexibly produce high-quality 300-mesh desulfurization gypsum powder with a maximum output of 22 t/h.

Project Details

Gypsum raw material is heated in the rotary kiln to remove part of the crystal water, converting dihydrate gypsum (CaSO₄·2H₂O) into hemihydrate gypsum (CaSO₄·0.5H₂O). The high-temperature gypsum after calcination is conveyed by an elevator into a cooling silo for forced cooling. This process prevents gypsum agglomeration and guarantees material flowability. Meanwhile, it stabilizes the physical properties of gypsum and avoids over-grinding.

The cooled gypsum material is fed into the GK1620 Raymond mill for grinding via a belt conveyor. The ground desulfurization gypsum powder is carried by airflow into the classifier. Driven by the impeller, unqualified coarse desulfurization gypsum powder that fails to meet the 300-mesh requirement is separated and falls back into the mill chamber for regrinding. Qualified fine desulfurization gypsum powder is transported by airflow into cyclone powder collectors for separation and collection. The collected finished desulfurization gypsum powder is packed by automatic packaging equipment and then delivered to the finished product warehouse.

Project Advantages

Eco-friendly: The whole production line adopts sealed negative-pressure design paired with high-efficiency cyclone dust collection, and dust emission is far below national standards.

Resource Recycling: The project successfully converts industrial solid waste (desulfurization gypsum) into high-quality raw materials widely used in the building materials industry, in line with the national circular economy development strategy.