What Are the Different Plasterer Jobs?
Gypsum industry: The growth rate of the gypsum industry has grown rapidly with the recovery of the global economy. This situation is based on the fact that the annual annual extraction of natural gypsum in the world has hardly changed in the past 10 years.
Gypsum industry
Right!
- Chinese name
- Gypsum industry
- Gypsum industry: The growth rate of the gypsum industry has grown rapidly with the recovery of the global economy. This situation is based on the fact that the annual annual extraction of natural gypsum in the world has hardly changed in the past 10 years.
- Data from the American Gypsum "Mineral Yearbook" states that natural gypsum mined and consumed worldwide in 2004 reached 106 million tons. The United States has the largest mining volume, reaching 18 million tons, accounting for 17% of the global mining volume; followed by Iran (10.8%), Canada (8.5%), Spain (7.1%), and China (6.5% or 6.9 million tons). (However, according to statistics from China's relevant departments, it is 29 million tons, which is mainly used for cement production.) Other top 10 countries are Thailand, Australia, France, and Germany. These 10 countries together account for 72% of the world's mining volume. According to German OneStone consulting company, about 45% of the global natural gypsum mining volume is processed into mature gypsum. The annual world gypsum output is about 66.5 million tons, of which 60% or 40 million tons comes from natural gypsum, and 40% or 26.5 million tons comes from synthetic gypsum and recycled waste gypsum. It is estimated that the world's annual output of synthetic gypsum is about 160 million tons, of which about 35 million tons come from desulfurized gypsum produced by the desulfurization system of power stations, about 110 million tons are by-products of phosphate fertilizer production, and phosphogypsum is about 15 million tons Chemical plaster. 90% of the synthetic gypsum used in the gypsum industry comes from desulfurized gypsum.
- For the gypsum industry, about 80% of plaster is used to produce building wallboards. About 20% is used to produce stucco or other gypsum products.
- For gypsum board factories, shorter set times for gypsum are important. Co-production processes of flash, milling and calcination are commonly used. For the use of desulfurized gypsum, the calcining furnace and related supporting hammer mills are designed by each plant according to its own process. Milling and calcining systems and matching vertical roller mills account for approximately 40% of the market. The market leader is Claudius Peters Process, and in the past two years he has received orders for nine EM mill systems. Gebr.Pfeiffer AG's MPS gypsum mill can meet virtually any production requirement and allows up to 45% of desulfurized gypsum to be added during the calcination process.
- The gypsum board factory is dried by a co-current dryer or a counter-current dryer. For fiber gypsum board drying, it is dried by a dry sieve. The gypsum board has a retention time of 32 to 40 minutes in a dryer that takes up as little space as possible. Each group is designed with 6 to 16 board surfaces and 3 drying areas. The accuracy of the co-current dryer feed unit is very important. First, the boards are cut and arranged on a series of boards, and then the stacking starts; the boards that follow must maintain the principle of "in and out" and maintain stable quality.
- Gypsum board factory machine operation is becoming increasingly important. This involves the coordination of wet end equipment, dry feeding equipment and destacking equipment, as well as coordination of dry end equipment and stacking equipment. These devices must be able to operate flexibly to produce gypsum boards of different sizes, thicknesses and qualities. Manual production must meet safety requirements when producing different products. Although the transformation of mechanized production methods in modern factories can almost guarantee the preparation of raw materials and the manipulation of paper, the operation of the board is fully automated. However, the high-speed production rate also requires a complete palletizing system at the production end.