The first gypsum board factory in China was built in 1978,and had a capacity of 4Mm2/y.It was comissioned and built by Beijing New Building Materials(BNBM,now owned by the China New Building Materials Industry Hangzhou Design and Research Institute).The raw material used in this line was natural gypsum,which was calcined in a heavy oil direct-heated rotary kiln.
展开▼