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Production and business unit: Wood Industry Research Institute
Application or promotion prospects:
I. Overview
The Sino-German Government Science and Technology Cooperation Program is an inorganic wood-based panel production technology suitable for China's actual situation. Gypsum particleboard is a new type of building material made of architectural plaster and wood shavings. Its main feature is the semi-dry production process, the water consumption in the production process is small, no harmful substances pollute the environment, its main use is as interior decoration, ceiling and partition board, after painting outdoor wall coating Used as an exterior wall panel. In 1986, the world's first gypsum particleboard plant was built in Finland with an annual output of 40,000 m3. In 1988, a second gypsum particleboard plant was built in Norway with an annual output of 60,000 m3. China is building two gypsum particle board factories.
Second, the main physical and mechanical properties
Plate density (kg/m3) 1100-1200
Static bending strength (MPa) 6.0-10.0
Modulus of elasticity (MPa) 2800-4200
Internal bond strength (MPa) 0.50-0.70
Surface bond strength (MPa) 0.60-1.00
Grip force (MPa) 40—60 -50—70
Moisture content (%) 2-3
Linear elongation (%) 0.06-0.08, (20 ° C, air relative humidity 30% - 85%)
Thermal conductivity (W/m·k) 0.18-0.25
Water absorption thickness expansion rate (%) 0.5-1.0
Third, the main raw material consumption
Taking the board density of 1150kg/m3 as an example, the material consumption of 1m3 gypsum particleboard is as follows: 1. Wood 200kg2. Gypsum powder 850kg3. Retarder 1kg4. Electricity 195kwh5. Heat 140,000 kcal 6. Water 300 liters (when the wood is dry) 7. Compressed air 25Nm3
IV. Construction Contents The gypsum particle board factory with a capacity of 30,000 m3 per year shall be built: 1. Gypsum powder calcining workshop with an annual output of 30,000 tons of building gypsum; 2. Plant area of ​​9000 m2, of which the main workshop is 4000 m2; 3. Boiler room, Evaporation capacity of 6.5 tons / hour, steam pressure of 25MPa; 4. Substation, two sets of 1000KVA transformers. V. Economic Benefits and Social Benefits The construction of a 30,000 m3 gypsum particleboard workshop and ancillary facilities with a total investment of about 35 million yuan, including equipment investment of about 18 million yuan and working capital of 5 million yuan. According to the general situation, the sales cost of producing 1m2 (10mm) plate is 9 yuan. At present, the price of similar gypsum board on the market is 12.5 yuan/m2, but the strength of gypsum particleboard is high, so the sales price is set at 18 yuan/m2. In this way, the production of 1 square meter of sheet can be profitable tax of 9 yuan, for an annual output of 30,000 cubic meters, that is, 3 million square meters (plate thickness of 10mm) gypsum particle board factory, the annual profit tax can reach 27 million yuan, The investment recovery period is 3-4 years. Gypsum particleboard is a new type of building material of good quality. It has good economic and social benefits and is an ideal investment project.
Contact information
Address: China Academy of Forestry, after Wanshou Mountain, Haidian District, Beijing
Zip code: 100091
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Gypsum particleboard production technology
Suitable for application: decoration of building decoration industry, artificial board veneer inorganic wood-based panel