Fluorine Containing Wastewater Treatment in Rare Earth Industry

The treatment of fluorine-containing wastewater in the rare earth industry: In recent years, China's new energy vehicles are about to enter the "2.0 era" dominated by intelligence, with multiple energy and driving modes running parallel. This not only increases the demand for lithium cobalt nickel resources, but also greatly drives the consumption of rare earths in magnetic materials and hydrogen storage materials.

As a major exporter of rare earths, how to optimize the utilization of rare earth resources in a green and efficient manner, break through the bottleneck of key rare earth material technologies, and achieve sustainable development of the rare earth industry has become an important issue in the development and utilization of rare earth mineral resources in China.

Single fluorocarbon cerium ore and monazite smelting technology

At present, the mainstream process for processing single fluorocarbon cerium ore in industry is the oxidation roasting hydrochloric acid leaching process, and its process flow is shown in the figure.

This method has a relatively low production cost for treating fluorocarbon cerium ore, but it is prone to producing fluoride rare earths during oxidation roasting, resulting in a long treatment process, high acid and alkali consumption, and difficulties in treating fluorine-containing wastewater. Therefore, developing an efficient green smelting process for the recovery of fluorine associated resources is the key to treating fluorine-containing wastewater and waste residue from the source.

Adsorption treatment process for Haipu fluorine-containing wastewater

In order to meet the needs of enterprises for efficient, simple, and low-cost deep treatment of fluorine-containing wastewater, the adsorption method developed by Haipu based on special adsorption materials has significant application advantages in operating costs, operating efficiency, safety, and avoiding secondary pollution compared to other defluorination technologies.

Haipu has developed a defluorination resin based on the properties and treatment requirements of fluorine-containing wastewater, which has the advantages of fast adsorption speed, high capacity, and easy regeneration. It can achieve deep defluorination of large amounts of wastewater, and the fluoride concentration can be treated up to ≤ 1.0mg/L, effectively solving the problems of limited adsorption capacity and frequent regeneration of most adsorbents.

At the same time, the entire adsorption system with fluorine removal resin products as the core has technical advantages such as low equipment operating costs, low maintenance costs, and simple operation.

At present, Haipu's defluorination resin products and complete adsorption systems are widely used for fluoride removal in mine water; Deep well water treatment for fluoride removal; Fluorine containing wastewater treatment in the photovoltaic industry; Fluoride removal from wastewater from fluorine chemical industry; Fluoride removal from industrial wastewater; Fluoride removal in the metal smelting industry; Fluoride removal in the electroplating industry; Deep defluorination of fluorine-containing mineral mining wastewater; Deep defluorination of metal smelting wastewater; Deep defluorination of organic synthesis chemical wastewater; Deep defluorination of fluorine-containing wastewater in the electronics industry, etc

Haipu Application Case 1

The business scope of Anhui New Materials Technology Co., Ltd. includes the research and development, production, processing, and sales of precursors, positive electrode materials, and new energy materials.

The lithium sulfate liquid generated during the production process of the enterprise needs to undergo defluorination treatment. Based on the characteristics, difficulties, and treatment requirements of the liquid, our company's relevant specialized adsorption materials are selected for adsorption treatment of the liquid. The effluent can meet customer requirements, and the wastewater design indicators are shown in the table below.

*Adsorption inlet and outlet water data

Haipu Application Case 2

A company produces 100 tons/day of wastewater with a pH of 9.5 and a fluoride content of 10.5mg/L during the production process, with a treatment requirement of ≤ 1mg/L.

For this purpose, our company uses nano hybrid fluoride removal adsorbent products to adsorb and separate fluoride ions in drinking water. The fluoride content after adsorption treatment is significantly reduced, which meets the customer's treatment requirements for this indicator.

Haipu Application Case 3

A mining enterprise produces groundwater with a fluoride content of about 1.4 mg/L during the process of mining ore. The enterprise requires that the fluoride content in the treated wastewater be less than 0.5 mg/L.

The experimental treatment effect shows that using Haipu nano hybrid fluoride removal adsorbent products for treatment, the fluoride ion removal rate in wastewater remains stable at over 92%, and the fluoride content in effluent can be controlled below 0.5 mg/L.

Keeping a certain safety margin while ensuring compliance with customer requirements can effectively prevent water quality fluctuations in the incoming wastewater from causing substandard effluent.