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Method for extracting rare earth from abyssal sediment

A deep-sea sediment and rare earth technology, applied in the field of rare earth, can solve the problems of increased production cost, pollution control cost, environmental protection management problems, unfriendly environment, etc., and achieve the effect of improving the floating grade, improving the leaching efficiency, and being environmentally friendly

Active Publication Date: 2018-05-04
INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Through the methods described in the above literature, these methods do not pre-enrich or treat deep-sea sediments, and directly use hydrometallurgical leaching technology to directly extract rare earth elements, which will produce a large amount of waste acid and waste residue during the leaching process, which is harmful to the environment. Unfriendly, extracting rare earths from deep-sea sediments will bring environmental protection problems, and production costs, especially pollution control costs, will increase significantly

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  • Method for extracting rare earth from abyssal sediment

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Embodiment 1

[0026] (1) For the deep-sea sediment TREO in a certain field in the Pacific Ocean is 765ppm, the desliming pretreatment is carried out through the cyclone, the TREO content in the product reaches 1080ppm, and the operation recovery rate is 65%;

[0027] (2) The product after the desliming pretreatment in step (1) is ground and slurried to a concentration of 35%, and modified water glass is added as an inhibitor, and WR-80 is used as a collector. For the flotation operation of roughing, sweeping and three fines, the amount of modified water glass for roughing is 2500 g / t·feed, the amount of collector is 1500 g / t·feed, and the amount of modified water glass for sweeping operation is 500 gram / t·feed ore, the amount of collector is 500 g / t·feed ore, and the beneficiation is blank beneficiation, the grade of REO obtained through flotation separation is 1.03%, and the operating recovery rate is 70% of flotation rough Concentrate;

[0028] (3) Mix and stir the flotation rough concen...

Embodiment 2

[0032] (1) Aiming at 950ppm of deep-sea sediment TREO in a certain field in the Pacific Ocean, the desliming pretreatment is carried out through a cyclone, the TREO content in the product reaches 1280ppm, and the operation recovery rate is 68%;

[0033] (2) The product after the desliming pretreatment in step (1) is ground and slurried to a concentration of 35%, and modified water glass is added as an inhibitor, and WR-80 is used as a collector. For the flotation operation of roughing, sweeping and three fines, the amount of modified water glass for roughing is 3000 g / t·feed, the amount of collector is 1800 g / t·feed, and the amount of modified water glass for sweeping operation is 600 g / t·feed ore, the amount of collector is 500 g / t·feed ore, and the beneficiation is all blank beneficiation, the grade of REO obtained through flotation separation is 1.33%, and the operating recovery rate is 72% of flotation rough Concentrate;

[0034] (3) Mix and stir the flotation coarse conc...

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Abstract

The invention discloses a method for extracting rare earth from abyssal sediment. The method comprises the following steps that (1), the abyssal sediment is subjected to desliming pretreatment; (2), aproduct obtained after the desliming pretreatment is subjected to flotation separation after ore grinding, and flotation rough concentrate is obtained; (3), the flotation rough concentrate is leached, and immersion liquid enriched with heavy rare earth and leaching residues containing light rare earth are obtained; and (4), the flotation separation is carried out after the leaching residues are scrubbed, and rare-earth ore concentrate is obtained. According to the method for extracting the rare earth from the abyssal sediment, the dressing and smelting condition is mild, the energy consumption is low, the efficiency is high, the discharge amount of waste fluid and waste residues is reduced, environment friendliness is achieved, and dilute acid for leaching operation can be recycled.

Description

technical field [0001] The invention belongs to the technical field of rare earths, in particular to a method for extracting rare earths from deep sea sediments. Background technique [0002] Rare earth is an important non-renewable natural resource, and its content in the earth's crust is not rare. The abundance of rare earth in the earth's crust is 200×10 -6 , higher than the abundance of gold, platinum, tungsten, molybdenum, cobalt, lead, zinc and other elements. About 250 rare earth minerals have been discovered, of which only 10 have mining value, such as bastnaesite and monazite. [0003] Rare earth elements have been used in metallurgy, machinery, petroleum and other traditional industries in the economy and society, such as spraying rare earth oxide CeO into molten steel 2 Powder can improve the strength and toughness of steel; adding an appropriate amount of La to the aluminum wire can significantly improve the electrical conductivity; La and Sm can accelerate the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03B9/00C22B3/04C22B59/00
CPCB03B7/00B03B9/00C22B3/04C22B59/00Y02P10/20
Inventor 熊文良邓杰陈达邓善芝张丽军胡泽松陈炳炎
Owner INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI