In the 1940s, semi-hydrated gypsum made from natural gypsum was used internationally to produce gypsum blocks by the flat mold casting method. In the mid-1950s, the production was changed to vertical mould casting and jacking technology, and the output increased significantly.
Since the 1970s, the molding technology has been continuously improved, and the vertical mold lifting process has developed from semi-automatic to fully automatic. For example, using hydraulic automatic cutters to form upper grooves, alloy molds are chrome-plated to significantly improve product surface quality, multi-cavity molds are used to increase single machine output, and pneumatic telescopic clamps are used to correctly position, clamp, lift and move the entire row of blocks.
Since the 1990s, flue gas desulfurization gypsum has been used as raw material to replace natural gypsum, and the quality of products has been continuously improved.
Gypsum blocks are produced and used in more than 60 countries around the world, which are mainly used as non-load-bearing internal partition walls in residences, office buildings, hotels, etc.
It has been recognized internationally that gypsum block is a sustainable green building material product, accounting for more than 30% of the total amount of interior walls in Europe. The European countries that produce and use gypsum blocks include Russia, France, Germany, Belgium, and Spain, Poland, Italy, Austria, Switzerland, Luxembourg, Greece, Turkey, Finland, Czech Republic, Romania, Bulgaria, Serbia, etc.
In addition to mainland China, there are 15 countries and regions in Asia that produce gypsum blocks, with a total of about 2,000 production sites. The main Asian gypsum block producing countries and regions are: India, South Korea, Singapore, Thailand, Indonesia, Pakistan, Afghanistan, Vietnam, Bangladesh, etc.; the Middle East includes Iran, Saudi Arabia, Israel, Jordan, Lebanon, Syria, Oman, Iraq, etc. The African gypsum block production countries are Algeria (2 million square meters/a), Egypt, Morocco, Tunisia, Senegal, etc.
Only Mexico produces gypsum blocks in North America. The South American gypsum block producers are Brazil, Chile, Argentina, Venezuela, and Colombia. Only Australia produces gypsum blocks in Oceania.
Post time: May-18-2021