Auxiliary leaching agent applied to ion-absorbed rare earth ore leaching process and ore leaching method of auxiliary leaching agent

Abstract

The invention discloses an auxiliary leaching agent applied to the ion-absorbed rare earth ore leaching process and an ore leaching method of the auxiliary leaching agent. The auxiliary leaching agent is a water-soluble surface active agent. Ore leaching liquid prepared through mixing of a leaching agent and the auxiliary leaching agent is used for leaching ion-absorbed rare earth ore, stable rare earth complex can be formed, moistening of the surface of soil is facilitated, and the leaching effect is strengthened. Meanwhile, due to the adding of the auxiliary leaching agent in the ore leaching liquid, clay hydration expansion and particle transferring can be effectively inhibited, and the effect of soil expansion preventing is achieved. The auxiliary leaching agent is used in the ion-absorbed rare earth ore leaching process, the rare earth leaching rate is increased, the use amount of the leaching agent is reduced, production cost is reduced, and ammonia nitrogen pollution is reduced; and in addition, the function of preventing soil expansion is achieved, and the probability of landslides is reduced.

Description

technical field [0001] The invention relates to the field of rare earth hydrometallurgy, in particular to a leaching aid used in the leaching process of ionic rare earth ores and a leaching method thereof. Background technique [0002] Rare earth (RareEarth, referred to as RE) is the 15 lanthanide elements with atomic numbers from 57 to 71 in the third subgroup of the periodic table of chemical elements, namely lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd) , promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb) , lutetium (Lu), plus scandium (Sc) and yttrium (Y), which are similar in electronic structure and chemical properties, are a general term for a total of 17 elements. Due to their unique 4f sublayer electronic structure, large atomic magnetic moment, strong spin-orbit coupling, and variable coordination numbers, the compounds formed by rare earth elements...

AI Technical Summary

Problems solved by technology

Although the above-mentioned process has been widely used in the industrial mining of ion mines, the following problems still exist: (1) A large amount of ammonium sulfate and ammonium bicarbonate are used in the mining process of ion-type rare earth mines, resulting in a large amount of ammonia nitrogen wastewater, and the concentration of ammonium sulfate As high as 3.5-4.0g / L; due to mine leakage and rainfall, wastewater can easily seep into soil, groundwater and surface water, resulting in excessive ammonia nitrogen in the environment

However, in such methods, the effect of preventing the expansion of clay minerals cannot be achieved at the same time.