White gypsum CEGIPS
CEGIPS FOR THE CEMENT INDUSTRY
It is a white to slightly brownish powder with a moisture content of between 6 and 12%, which is purified by a suitable separation technique to above 95% calcium sulphate dihydrate, known as gypsum. Gypsum is a neutral inorganic salt with an average particle size between 80 and 100 microns. According to the regulation in force, the levels of hazardous substances are below the annual soil intake limits.
- Directly in the cement industry as an alternative to natural gypsum or gypsum from the desulphurisation of flue gases from thermal power plants (REA-gypsum, FGD-gypsum);
- Indirectly by further calcination in the production of gypsum building products (Gypsum plasters, self-levelling floor screeds).
In cement works, it is used as an additive to cement to prevent mortars from binding too quickly or falsely, at a rate of 3-5%.
It has the following advantages over natural gypsum
- higher purity, above 95%,
- higher sulphate content, above 55%,
- constant quality,
- loose cake shape, minimum moisture content 6%,
- reduction in milling costs.
A number of studies have also shown that it is superior to REA or FGD gypsum, which is produced by flue gas desulphurisation in thermal power plants, in terms of its effect on the hydraulic and other physico-chemical properties of cement.
- Wietersdorfer & Peggauer Zementwerke GMBH
- Salonit Anhovo, gradbeni materiali, d.d.