Development of gypsum sulfuric acid

The process of studying the production of sulfuric acid from gypsum started many years ago. Two years ago, this newspaper reported that an enterprise in Guizhou used phosphogypsum to produce cogeneration cement to form an industrial chain. However, today's publication of this news prompted a new message. The continuous progress and maturity of such technologies need not be mentioned. It is worth noting that the sulfuric acid market has risen from five to six hundred tons two years ago to nearly this year in March. 2000 yuan / ton, this month will still maintain the upward trend. Just as high oil prices drive the development of alternative energy sources, the firestorm in the sulfuric acid market has also provided a good opportunity for the development of new technologies for the production of sulfuric acid. On the other hand, there are a large number of industrial by-products of gypsum in various parts of the country that pollute the environment and urgently need to be addressed. With special emphasis on sustainable development today, it is of great significance if we can implement comprehensive utilization of it. In this context, the economics and environmental protection of the gypsum sulphuric acid process have been highlighted and the development is justified.
Sulfuric acid production in China usually uses sulfur and pyrite as raw materials.
Look at the sulfur process first. At present, China's sulfuric acid production ranks second in the world, second only to the United States. Nearly half of the production capacity is completed by the sulfur process. Sulfur is a resource product that China lacks very much. At present, China's dependence on the import of sulfur resources has exceeded 50%. With the substantial increase in China's imports, overseas sulfur dealers continue to substantially increase prices, so that sulfuric acid production companies are facing tremendous pressure. Look at the pyrite process. China's pyrite resources are very limited, and most of them are poor ore, which restricts the expansion of sulfuric acid production capacity. Although China's sulfuric acid production continues to grow at a high rate, there are still millions of tons of gaps each year. China's gypsum resources are relatively abundant, among which are high-grade gypsum mines. Therefore, the development of gypsum-based sulphuric acid can solve the problem of sulphur and pyrite raw materials that restrict the production of sulphuric acid.
From the gypsum resources of industrial by-products, there are a large number of such by-products in many areas in China. The production of phosphogypsum from phosphoric acid and phosphate fertilizer processes, titanium gypsum from the production of titanium dioxide, and the production of lemon gypsum from citric acid production processes are a worldwide problem. This new process, while opening up new ways for sulfuric acid production, also provides a solution for the treatment of waste gypsum and realizes the organic unity of economic benefits, social benefits, and environmental benefits.

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