The chang yingqing chemical industry is located in hunan changsha, and chinese sulfate industry technology rose in the 1990s when the founders of the sulfate industry operated and exported sulfate products containing iron. Particle/seven water powder, manganese sulphate powder particles, magnesium sulphate 7 water \\/a water-free powder particles, micro-element particle fattening for magnesium fertilizer, zinc sulphate 1 water \/ seven water powder particles, sulphate pressure, copper sulphate. Products are widely used in agriculture, feed fortification, industry, water treatment, etc。