Fluorgypsum is a by-product of hydrogen fluoride produced from sulfuric acid and fluorspar. It contains highly corrosive sulfuric acid and hydrofluoric acid. It is a highly hazardous solid waste. At the same time, fluoro-gypsum is also a rare reusable resource. The research group of Professor Hou Haobo from the School of Resources and Environmental Sciences of Wuhan University undertook the key project of the National 863 Program "Key Technologies for the Harmless treatment and resource utilization of fluorogypsum", which can realize the harmless treatment and resource utilization of fluorogypsum.
It is reported that the accumulation of fluorine gypsum waste in China ranks first in the world. In the past, most of the fluorine gypsum was stored as a kind of solid waste after a little treatment, polluting the soil and groundwater environment. His research group used the technology of solid fluoride deacidification and gel encapsulation to combine fluoropressum and other industrial waste residue to produce a new environmental material.
In the process, the highly toxic fluorine becomes a catalyst and is all combined into the new material. This production process can reduce the consumption of resources, energy and waste discharge, and successfully realize the harmless treatment and efficient and high value-added utilization of fluoro-gypsum. The water reduction rate and other performance indexes of the new environmental materials produced are expected to reach or exceed the similar foreign products. It IS reported that the research group is working with related enterprises to establish a 50,000-ton new-type material demonstration area in Hebei and a 50,000-square-meter application demonstration project of mine tailings filling in Daye, Hubei.
