Review Of Gypsum Status

In daily life, dihydrate gypsum refers to natural dihydrate gypsum (CaSO4·2H₂O), also known as gypsum. At present, the raw materials of gypsum in China include natural gypsum and industrial by-product gypsum. In 2016, the amount of industrial by-product gypsum has accounted for 79.95% of the total utilization, while natural gypsum only accounted for 20.05%. It is expected that by 2022, only about 100,000 tons of high-quality natural gypsum will be mined, which will not meet the growing market demand for gypsum raw materials. The annual demand for stone is expected to increase to 75 million tons by 2022 based on the total construction volume and decoration area (the average period between house decoration is seven years). The high quality gypsum resources with little reserves are recklessly exploited and not rationally utilized, which not only causes a large amount of non-renewable natural resources waste, but also seriously affects the ecological environment. The main reason for the decline of natural gypsum production is the current and even in the future for a long time to strengthen the national environmental protection, and to protect the natural environment, save energy, put an end to the three high emissions as the main objective of the industrial restructuring of the industrial policy. At present, most of Shandong Province, Hebei province, Guangdong province, Henan, Anhui, Jiangsu, Zhejiang and many other governments expressly prohibit natural gypsum mining. Restrictions on the exploitation of natural gypsum in many places have led to a number of natural gypsum processing companies being forced to stop production. In order to meet the needs of the rapid development of the country, supplement the shortage of green environmental materials, high purity chemical gypsum (industrial by-product gypsum) to replace the original high-grade natural dihydrate gypsum has been imminent, we need to accelerate the development of new industries to adapt to the development of The Times. In the industry, the crystal method is used to produce dihydrate gypsum to solve the problem of achieving high purity chemical gypsum and to relieve the environmental pressure caused by the excessive exploitation of natural gypsum.In recent years, the development and utilization of fluoropgypsum has received increasing attention. From the view of its resource utilization achievements and products, the development and utilization of fluoropgypsum has entered a new stage. Fluorine gypsum from the past filler, and 1 as a cement retarder and other simple use, to the present painting gypsum, new wall and self-leveling high output value of product research and development, fully shows that people have a new understanding of the value of industrial by-product fluorine gypsum, but also shows that fluorine gypsum research and development level continues to improve, comprehensive utilization methods continue to increase, the scope of application is also constantly expanding, It has greatly improved the utilization efficiency of industrial by-product resources