A rare earth leaching mother liquor concentration and enrichment process and obtained products

Abstract

The invention discloses a concentration and enrichment technology of rare earth leaching mother liquor and an obtained product. The concentration and enrichment technology of the rare earth leaching mother liquor comprises the steps of leading an impurity removing agent into a low-concentration leaching mother liquor of which concentration is less than 1g / L to neutralize and remove an aluminum impurity; leading the aluminum-removed mother liquor into an ion exchange column to be subjected to adsorption and enrichment of rare earth ions, and using acid for desorption so as to obtain a liquid-state rare earth product. According to the concentration and enrichment technology of the rare earth leaching mother liquor and the obtained product, production processes of a mine and a separation plant are greatly simplified, the technological process is shortened, the comprehensive cost is reduced, benefits are increased, the standard of environmental prevention is reached, the produced novel 'liquid-sate rare earth enrichment liquid' product is high in rare earth concentration, low in impurity content, and superior to a 'solid-state' rare earth product produced by an existing technological craft, and the novel 'liquid-state rare earth enrichment liquid' product can be available to direct slot putting so as to be separated and used by the separation plant.

Description

technical field [0001] The invention relates to the technical field of mining technology, in particular to a rare earth leaching mother liquor concentration and enrichment process and the obtained product. Background technique [0002] So far, there are mainly two leaching and enrichment processes for "ionic rare earth ores", one is "pool leaching" and the other is "in-situ leaching". Due to the great damage and impact of "pool leaching" on the ecological environment, my country's mining technology policy for the mining of "ionic rare earth mines" has eliminated them, and the "in-situ leaching" process is now being implemented. The schematic diagrams of the two mining processes are as follows: figure 1 and figure 2 shown. [0003] In the current rare earth leaching process of ionic rare earth mines, due to the large amount of leaching mother liquor, low rare earth concentration, and heavy follow-up processing load, it cannot be directly extracted into the separation tank...

AI Technical Summary

Problems solved by technology

[0010] In summary, the main problems of the solid rare earth products produced by the prior art technology are: one, it cannot be directly put into the tank, and needs to be decomposed and removed by hydrochloric acid; the other is that the ammonia nitrogen-containing wastewater or COD pollute the environment; Higher, which is not conducive to the processing of subsequent processes; the fourth is that the obtained solid rare earth products need to go through dehydration, pressure filtration, burning and other processes in the mine, and they must be acid-dissolved, decomposed, and removed again in the separation plant. High, high pressure on environmental protection

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