Gypsum Grinding Mill

Gypsum is one of the most widely used materials in the building sector and originates both naturally and as a synthetic by-product from a range of industrial processes. Approximately 3 million tonnes of gypsum waste arises only in Europe annually
The mineral Gypsum precipitated some 10-400 million years ago when sea water evaporated. From gypsum processing plant
a chemical point of view, it is Calcium Sulphate Dihydrate (CaSO4.2H2O) deposited in sedimentary layers on the sea bed. Under high pressure and temperature or under high salinity Gypsum turns into Anhydrite (CaSO4).

In nature, Gypsum and Anhydrite occur as beds or nodular masses up to a few metres thick. Gypsum is mostly formed by the hydration of Anhydrite. The depth of hydration can range from the surface of the deposit down to three hundred metres, depending on temperature and pressure, topography and the structure of the deposit. Anhydrite is often mined in conjunction with Gypsum, but is comparatively limited in its technical applications. The content of calcium sulphate in a sedimentary rock varies from 70% to 100%, the rest being clay and limestone.

Gypsum is extracted from open-cast mines or underground mines using room and pillars mining methods. Gypsum is normally only screened to remove 揻ine particles?(mainly mudstones), then crushed and finely ground. The extraction process implies an unavoidable impact on the landscape and the natural environment. However, human activity does not necessarily mean loss of biodiversity and danger gypsum quarrying methods
for eco-systems.

Indeed, without human economic activity, Central Europe would nowadays almost be exclusively covered with forests. This type of habitat is not particularly favouring the uptake of many species as many herbaceous plants cannot live under the leafy canopy of the trees due to the lack of light. Those conditions would also have prevailed at gypsum locations with relatively shallow soils. But as small-scale farming...