Quzhou rare earth new ammonia-free technology knocks on green mining gate

In recent years, Ganzhou Rare Earth Mining Co., Ltd. has used a new type of ammonia-free technology to replace traditional ammonia nitrogen technology and knocked open the door of rare earth green mining, which is of great significance to the transformation and innovation of ion-type rare earth mining technology and process in the south.

Ganzhou, Jiangxi Province, is the discovery and designation area of ​​ionic rare earth resources and the invention of mining technology. It has always been at the core of the development and utilization of ionic rare earths and technological development. Ionic rare earth mining technology has always maintained the world's leading level. In recent years, China has promulgated and implemented the world's first "Rare Earth Industrial Pollutant Discharge Standard", which puts forward more stringent requirements for the discharge of waste water, waste gas, and waste slag from the rare earth industry. Ionic rare-earth traditional ammonium sulfate leaching - ammonium bicarbonate or oxalic acid precipitation The ammonia nitrogen produced by the in-situ mining and leaching method has a certain impact on the environment. How to increase resource utilization, achieve conservation and use of resources and effectively protect the environment complement each other, is a practical topic placed in front of rare earth mining enterprises.

Luzhou Rare Earth Minerals Co., Ltd., as the sole mining right holder of Ganzhou Rare Earth, and the largest resource platform for ionized rare earths in South China, is led by “Energy conservation, environmental protection, orderly development, sustainable use, and sustainable development” and is oriented toward “high efficiency, green, and environmental protection. “Goal” to carry out in-depth research and experiment on green extraction and separation technology of rare earth resources, efficient utilization of low-grade and complex and difficult-to-handle resources, and continuous exploration of new technologies and new processes for rare earth mining. Since 2013, Yanzhou Rare Earth Minerals Co., Ltd. has cooperated with relevant organizations to organize the technical force on the ammonia nitrogen problem in the extraction process of ionic rare earth resources and the applicability of in-situ leaching technology based on the existing in-situ leaching mining technology. Problems were tackled, and a large number of screenings and experiments were conducted from the aspects of leaching agent, leaching process, mother liquor precipitation process, etc. The theoretical demonstration of the new process of ionic rare earth without ammonia mining and mother liquor enrichment was completed, and patent application has been filed upwards. At the same time, the industrial trials of each stage were completed in mines with various grades and mines with different grades and residual mines, such as the Longnan foot cave in Zhangzhou, and the mines with different deposits. The results have been relatively satisfactory: Compared with traditional ammonium sulfate leaching - Ammonia bicarbonate or oxalic acid precipitation process, the new ammonia-free mining process system has obvious advantages such as non-ammonia nitrogen emission, simplified process flow, low production cost, and high resource recycling rate.

After repeated experiments and demonstrations and successful industrialization tests, Quzhou Rare Earth Minerals Co., Ltd. has invested exclusively in the establishment of Quzhou Rare Earth Mining Technology Services Co., Ltd., which has invested funds and specialized technical forces to further optimize and improve the new ammonia-free mining process system and accelerate related technologies. The transformation of results and application promotion. At present, Yanzhou Rare Earth Mining Technology Service Co., Ltd. is conducting comprehensive tests for rare earth mines in different geological conditions in the Dingnan and Longnan rare earth mining areas, and entrusts qualified environmental monitoring units to monitor the entire process to ensure the maturity and scientific nature of the new process. Industrial application feasibility.

Professionals predict that the successful invention and application and promotion of new rare earth-free ammonia mining technology in Yanzhou will enable the ion-type rare earth mining to take a historic step towards green energy conservation and environmental protection, and greatly promote the sound development of economic benefits and environmental protection benefits. A new chapter in the history of rare earth mining will continue to write a new chapter for the healthy, sustainable development of the rare earth industry.