calcined gypsum

Calcined gypsum is produced by heating gypsum at 150°C or higher, which drives off the molecularly bonded water. This results in the formation of a dry, powdery material known as calcined gypsum powder, which finds extensive application in various industries. This product is a vital component in numerous construction applications, being particularly significant in the manufacture of gypsum-based building materials like plaster, cement, and other products.

Types of calcined gypsum

There are two primary methods for the production of calcined gypsum plaster: the dry calcination of gypsum and the wet calcination of gypsum. The dry calcination process involves subjecting raw gypsum to high temperatures in a specially designed kiln, allowing the water content to be removed. It is a controlled process that ensures the desired chemical and physical properties are retained in the final product. Meanwhile, the wet calcination process involves mixing gypsum with water to form a slurry. This slurry is then heated at high temperatures under pressure, effectively removing the water from the gypsum. This wet calcination method is often used in industrial settings and can be more energy-intensive than the dry process.

Calcined gypsum is widely used in the construction industry for its versatility and performance. One common application is in the production of calcined gypsum plaster, which is used for interior wall finishes, decorative elements, and as a base for painting. Another crucial use of calcined gypsum is in the manufacture of construction materials like drywall, also known as gypsum board or plasterboard.

Advantages of calcined gypsum

One of the primary advantages of calcined gypsum is its fire-resistant properties, making it a preferred material for fire-rated walls and ceilings. Additionally, calcined gypsum is known for its soundproofing abilities, providing acoustic insulation in buildings. This material is also cost-effective and easy to use, enabling efficient construction processes. Furthermore, calcined gypsum has a low environmental impact, as it can be recycled and used in sustainable building practices.

The application of calcined gypsum

Calcined gypsum is used in the creation of molds for casting metals and other materials. Its ability to maintain intricate shapes and withstand the casting process makes it a popular choice in the foundry industry. Furthermore, in the agricultural sector, calcined gypsum is utilized as a soil amendment to improve soil structure and provide essential nutrients to plants. The calcined gypsum powder is spread on soil to improve water penetration and prevent soil compaction. This helps in the growth of healthy plants and crops.