Добыча редкоземельных металлов
Добыча редкоземельных металлов (solvent extraction method) is the core industrial process for separating and purifying rare earth elements from mixed minerals. It utilizes the difference in distribution coefficients of different rare earth ions in organic solvents and inorganic aqueous phases to achieve the separation of high-purity single rare earth elements. This technology has established China’s dominant position in the global rare earth smelting and separation field.
The following is the core structure of rare earth extraction process:
1. Core principles and processes
Basic principle: Mix an acidic solution (водная фаза) containing multiple rare earths with a specific organic extractant (органическая фаза) vigorously in an extraction box. Due to the differences in chemical properties of different rare earth elements, they will transfer to the organic phase with different affinities.
Multi stage cross flow/countercurrent extraction: Due to the extremely similar properties between rare earth elements (especially adjacent lanthanide elements), continuous extraction, мойка, and back extraction at hundreds or even thousands of levels are necessary to separate a single rare earth element to a purity of up to 99.999%.
2. Common extractants
According to different types of rare earth minerals and extraction requirements, the following types of phosphorus or amine organic extractants are commonly used in industry:
P204 (HDEHP): Acidic extractant, mainly used for the separation of heavy rare earths and the extraction of elements such as yttrium, самарий, европий, гадолиний, и т. д..
P507 (EHEHPA): Acidic extractant with high separation coefficient, is currently the mainstream reagent for separating light rare earths (such as lanthanum, Cerium, празеодим, neodymium).
N235 (N1923): Alkaline/neutral extractant, commonly used for separating light rare earths or extracting associated elements from hydrochloric acid systems.
3. Technological breakthroughs and industrial impacts
Cascade extraction theory: proposed by the team of renowned Chinese chemist Academician Xu Guangxian, it solves the world-class problem of traditional processes being difficult to achieve industrial mass production of single high-purity rare earths, and enables China’s rare earth separation technology to reach a global leading level.
Green extraction process: Modern extraction technology is developing towards non saponification and low ammonia nitrogen wastewater discharge to solve the environmental pain points in traditional extraction processes.
Наши экстрагенты металлов, как показано ниже, если вам нужен какой-либо вид, пожалуйста, спросите нас:
- P204 (D2EHPA или HDEHP) Используется на первом этапе удаления примесей из латеритной никелевой руды..
- P507 экстрагент цветных металлов для меди, цинк, кобальт-никель, кадмий, золото серебро, металлы платиновой группы, редкоземельные элементы и так далее.
- DY272 Экстрагент для разделения никеля и кобальта, он может извлекать кобальт из раствора никеля-кобальта, тогда оставь чистый никель.
- DY984N реагент для экстракции меди растворителем.
- ДИ319 Высокоэффективный экстрагент для совместной экстракции никеля и кобальта для переработки аккумуляторов, может удалять никель и кобальт из электролита литиевой батареи.
- QL256-2 Никель Кобальт Марганец Совместная экстракция Экстрагент.
- ДИ377 эффективный экстрагент для разделения никеля и алмазов.
- ДИ366 Экстрагент скандия.
- DY316 Экстрагент лития.
