Xiang fluorine company dry aluminum fluoride condensation technology achieved results

In recent years, Hunan Nonferrous Fluorine Chemical Group Co., Ltd. Xiangxiang Fluorine Chemical Co., Ltd., a relevant scientific research institute within the United Nations, has carried out a large number of comprehensive utilization of fluorine-containing effluent through the transformation of the company's dry aluminum fluoride atmospheric condensation technology. Research and set up a project team to collect all the atmospheric condensate of the six dry production lines of Xiangxiang Company, and to increase the concentration of fluorine concentrate. At the same time, comprehensive recovery has achieved certain results.

Xiangxiang Fluorochemical Co., Ltd. is a large-scale state-owned enterprise engaged in the production of fluoride salts. Its main products are dry aluminum fluoride and cryolite. The dry aluminum fluoride project is a production line introduced from Switzerland in 1988, featuring low consumption and low pollution.

The dry atmospheric condensate mainly comes from the dry aluminum fluoride production process. The hydrogen fluoride gas reacts with the dried and dehydrated aluminum hydroxide in the fluidized bed to directly obtain the aluminum fluoride product. The tail gas is treated with a potting liquid to achieve purification. For the purpose of condensation and gas absorption, the gas is discharged after further defluorination. After the condensate is poured out of the production system, it is called the dry atmospheric condensate, in which the contents of F, Al, Na and other elements are relatively high. If they are sent directly to the sewage treatment station, they will put pressure on the sewage treatment. The discharge of standards is extremely unfavorable. The company's related scientific research institutes in the United Nations have conducted extensive research on the comprehensive utilization of fluorine-containing wastewater, and set up a project team to collectively collect the atmospheric condensate from 6 dry production lines of Xiangxiang Company, and part of them will be recycled, and the rest will be recycled. It is used to make cryolite. The last clear liquid is used for the absorption solution of the acid system of Xiangfluor Co., Ltd. to achieve zero discharge of condensate. In 2010, a major national water treatment project focused on Central South University, which has achieved breakthroughs in the recovery of calcium fluoride from fluoride-containing wastewater.

In 2011, the company invested a further RMB 700,000 to comprehensively recycle atmospheric condensate, increase the concentration of fluorine in the condensate, and recover fluorine resources from the fluorine-containing waste water. The technology improves the recycling rate of atmospheric condensate by more than 90% and recovers 10,000 tons of cryolite. After treatment, it achieves discharge of fluorine-containing wastewater up to the standard (10mg/L or less); it reduces the use of treatment chemicals by 15% and slag volume by 15%; If we reduce the number of shutdowns by 2 times per year, we can reduce the production loss by 40 million yuan per year, reduce the cost of fluoride-containing wastewater treatment by 10 million yuan per year, and have significant economic benefits and huge social benefits.