Stages of construction plaster production

Gypsum is one of the specialized building materials that has many applications in such as covering walls and surfaces, payment and interior construction of buildings and the like.
The first step to manufacturing plaster in industrial plants is to supply its raw material. Gypsum stone is the raw material required for industrial units producing gypsum powder. Semnan Razi plaster company has one of the richest plaster mines in Iran and is completely independent in this regard.
Production process of white plastering , micronization and molding
In the first step, the quality gypsum stone enters the factory depot after the purity is recognized and approved by the quality control unit. Production begins with the crushing process of the stone, and the gypsum is crushed in a hammer mill or crusher to create a suitable grain. The crushed parts are separated by size and guided to the furnace.
The gypsum is cooked in rotary kilns for approximately 45 minutes at a temperature of approximately 160 °C.
After the baking process, the chalk stone goes into the baking tail silo and then into the grinder.
At this stage, the cooked gypsum is softened and powdered by special grinders and re-seeded .
At this time, the crushed chalk stone is divided into two parts. One part of the product is packaged in bags of different sizes, and one part is sent to the market for sale as a white plaster, and the other part is inserted into a device called a depositor or separator.
The function of the depositor is such that, due to its calibration, the chalk grains are returned to a specific size. According to the required granulation, micronized powders with granulation or mesh can be produced using 100-200.
Mold plastering is one of the types of plaster produced in Semnan’s Razi plaster factory, which uses micronized plaster to produce it.
In this way, in the final stage, by performing the process of adding and adding a special material, it will be transformed into a molding cast.
The higher strength of the product and its finer granulation than construction plaster is one of the reasons for using this product for mold production.
It comes in packs of 30kg and 40kg to both domestic and foreign markets

We are now proud that by God’s grace with the use of modern technology and the efforts of a dedicated and specialized manpower, we are a producer of the highest quality plaster in the Semnan region. For more information about the types of construction plaster, its application and price, contact us.