硫酸钾是一种优质无机钾肥,目前世界年产量约400万t,其中可调出量300万t。我国许多地方的土壤含钾较低,为此,农业部曾在全国开展“补钾工程”。目前,全国年需求量已超过100万t,主要依赖进口。农业部、化工部、国家烟草专卖总局投资数亿元在青海格尔木盐湖建设一个年产20万t的硫 Potassium sulfate is a kind of high-quality inorganic potash fertilizer, and the annual output in the world is about 4 million tons, of which 3 million tons are adjustable. In many parts of China, the soil contains a relatively low amount of potassium. Therefore, the Ministry of Agriculture conducted a “potash project” throughout the country. At present, the annual demand in the country has exceeded 1 million tons and mainly depends on imports. Ministry of Agriculture, Ministry of Chemical Industry, State Tobacco Monopoly Administration invested hundreds of millions of dollars in Qinghai Golmud Salt Lake to build an annual output of 200,000 t sulfur