Magnesium hydroxide, alias caustic, light burned magnesia, etc., is a colorless hexagonal column crystal or white powder, hardly soluble in water and alcohol, soluble in dilute acid and ammonium salt solution, aqueous solution is weakly alkaline. Magnesium hydroxide is widely used and widely used in electronics, medicine, food, chemical materials, rubber, building materials, plastics, daily-use chemicals and other fields.
In the field of environmental protection, magnesium hydroxide is known as an "environmentally friendly" environmental protection agent and has the advantages of safety, non-toxicity, harmlessness, strong adsorption capacity, and high activity. It is mainly used for the removal of heavy metals, acid neutralization of wastewater, printing and dyeing wastewater. Treatment, flue gas desulphurization, etc., have been widely used in the world. In terms of environmentally friendly desulfurization, magnesium hydroxide can be used in power plants, thermal power plants, steel plants, etc. instead of caustic soda and lime as a neutralizing agent for acid-containing wastewater for flue gas desulfurization, wastewater treatment, and heavy metal removal.
At present, a lot of research work has been done on flue gas desulfurization at home and abroad. At present, more than 20 kinds of mature desulfurization technologies are used in the desulfurization market. Among them, the magnesium hydroxide wet flue gas desulfurization technology is a kind of maturity that is second only to the calcium method. The desulfurization process is economical and practical, with good market development prospects. According to the "2017-2022 Global Market for Magnesium Hydroxide Desulfurization Investment Report 2017" released by the New Sijie Industrial Research Center, global consumption of magnesium hydroxide in the field of environmental protection accounted for more than 80% of the total in Europe; In developing countries represented by China, in recent years, with the strengthening of economic strength and increasingly strict environmental protection regulations, flue gas desulfurization is imperative, but the magnesium hydroxide desulfurization application market has not yet been widely popularized. Global consumption of magnesium hydroxide in the environmental protection field is concentrated in Japan, South Korea, North America, and Europe.
Japan was the earliest country that used the magnesium wet process to conduct flue gas desulfurization. It was put into operation in the 1990s. Based on the many advantages of magnesium desulfurization, Japan's Mitsubishi Heavy Industries, Toyo Engineering, Fuji Oil and other companies competed to develop this. technology. Japan mainly uses slurry magnesium hydroxide in the field of flue gas desulfurization every year. At present, Japan has become the country with the largest magnesium desulfurization scale and the largest magnesium dosage in foreign countries. In Korea, magnesium oxide and magnesium hydroxide are used in flue gas desulfurization or other environmental protection fields. From 2013 to 2016, the consumption of magnesium hydroxide for environmental protection desulfurization increased from 700,000 tons to 835,000 tons, showing a year-on-year growth trend.
Due to the increasingly strict environmental protection regulations and sulfur dioxide emission standards in Europe, the German power industry has great demand for flue gas desulphurization equipment, and the desulfurization technology has been continuously improved. The magnesium hydroxide desulfurization industry is widely used in Europe. From 2013 to 2015, with the continuous improvement of environmental protection requirements for power plants and chemical industries in Europe, the consumption of magnesium hydroxide for environmental protection desulfurization in the region has grown steadily. In 2016, the consumption of magnesium hydroxide for environmental protection desulfurization in the region reached 297,000 tons.
The research and application of U.S. magnesium fume desulphurization began in the 1970s. The magnesium hydroxide desulphurization was first applied to the papermaking industry and pulp preparation. It began to be applied to flue gas desulfurization in 1970. Before the 1980s, the process of flue gas desulphurization was mostly magnesium hydroxide desulphurization—magnesium sulphide recovery—magnesium oxide recycling—sulphuric acid production by using sulfur dioxide. The operation of the device was good, and it was the popularization and application of this process in the future. Lay the foundation. The largest consumption area of magnesium hydroxide in the United States is in the field of environmental protection. Among them, the field of flue gas desulfurization and water treatment is the focus of its application. From 2013 to 2016, the consumption of magnesium hydroxide in environmental protection desulfurization showed an increasing trend, with an annual growth rate of about 8%.
Xinsijie industry researcher believes that the United States, Japan and South Korea, Europe and other developed countries or regions are the world's major consumers of magnesium hydroxide for desulfurization, mainly used in wastewater treatment, flue gas desulfurization, heavy metal removal, etc., applied in the field of environmental protection Long development time. With the global environmental pollution problem becoming increasingly prominent, environmental protection desulfurization, denitrification and other issues have attracted the attention of the global market. Europe and the United States, Japan and South Korea and other developed countries continue to increase environmental protection governance, encourage the development of environmental protection products, and continuously improve production technology. Further open up new application areas. The developing countries represented by China are also increasingly concerned about the management of environmental pollution. However, due to factors such as technology, ideas, and policies, the market for magnesium hydroxide for environmental protection desulfurization has not yet been opened up, and there is a huge potential for market development.