Calcination kiln

industrialplaster

The calcination unit is the heart of the process. GRELBEX Technologies offers different technologies to meet your requirements: - For all your kinds of plasters, GRELBEX Technologies recommends its Four Marmite GRELBEX FMG MULTIPLASTERS GRELBEX with indirect contact operating by batch or its kiln with direct contact. For the FMG kiln, the heating is carried out by burners. The fumes circulate in the space between the rotary drum and the fixed surrounding wall. The heat is transmitted to the product through radiation of the drum wall by convection and by conduction. The plaster constituted essentially of semi-hydrate calcium sulfate [CaSO4. ½ H2O] is obtained by gypsum partial dehydration at a calcination temperature between 150 to 190°C to eliminate up to 16 % of water. For the kiln with direct contact, the operation is provided with the same gypsum particle size as this of the FMG Multiplasters Kiln (0 - 300 mm). The gypsum is dehydrated to a temperature of 550°C. The production capacity of overcalcined plaster is 70 tons / day. - For high-end alpha plaster for medical and industrial applications, the autoclave kiln is a calciner under pressure. - For beta plaster intended to prefabrication and construction plasters industry, GRELBEX Technologies recommends its CYCLONE kiln.