氢氧化钙的开发成就和发展趋势（Development achievements and development trend of calcium hydroxide）.docVIP

氢氧化钙的开发成就和发展趋势（Development achievements and development trend of calcium hydroxide） Development achievements and development trend of calcium hydroxide First, the development history and present situation of lime products in China Our country is one of the earliest countries producing and utilizing lime. Our ancestors began to calcine lime and lime very early, and its history can be traced back to 5000 years ago. According to archaeological research, in the the Yellow River River Basin Chinese many cultural relics in Longshan period, has been met with lime plaster finish solid walls and ground (about 2800-2300 BC). The lime used in the Longshan site has been made by artificial calcination, according to C14. Ancient lime is a common material for reinforcing foundations. It is not only the bond material for masonry but also the covering material for walls and floors. Many ancient splendid murals and ground sites have been preserved, using ancient cementitious materials - lime. The construction of Qin the Great Wall is also a case in point. With the development of modern industry, lime, as the main material of civil engineering, has opened many uses in many new industrial sectors. Such as metallurgy, glass, alkali production, sugar refining, paper making, tanning, calcium carbide and organic chemicals, carbonized brick, carbonized board, and soil improvement, water treatment, gas purification and so on, a large amount of lime is used. As a result, many types of lime kilns have been built in various parts of the country, and lime production in neighboring countries has also increased rapidly. Two, the development of high-end calcium hydroxide products good news In 80s, the 803 coating with polyvinyl alcohol, semi acetal and lime paste as the main component was successfully developed in Shanghai Construction Institute. It was put into operation in Shanghai Zhongnan building materials company for the first time. It was welcomed by customers because of its low price and go