Method and system for enriching lithium from sodium aluminate solution in an alumina plant

A technology of alumina and sodium aluminate, applied in the field of lithium enrichment, can solve the problems of unseen, unreasonable utilization of lithium resources, deterioration of electrolytic cell conditions, etc., to achieve rapid and efficient separation, minimized production disturbance, and high efficiency separation effect
CN109650413BActive Publication Date: 2021-05-25开曼铝业(三门峡)有限公司
0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
开曼铝业(三门峡)有限公司
Publication Date
2021-05-25

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a method and system for enriching lithium from a sodium aluminate solution in an alumina factory. The method includes exchanging heat and cooling the lithium-containing sodium aluminate solution, reacting with an aluminum hydroxide adsorbent to precipitate lithium, and collecting the lithium after filtering. The filter cake is reheated and re-dissolved, the re-dissolved slurry is filtered, the obtained second filter cake is filtered after being slurried, and countercurrent washed for many times, and the obtained third filter cake is the lithium-rich adsorbent; the system includes Adsorption assembly, adsorbent preparation tank, first centrifugal pump, primary heat exchanger, secondary heat exchanger, first filter assembly, redissolving assembly, second filter assembly, second centrifugal pump, third filter assembly, and second filter assembly Three centrifugal pumps. The present invention proposes for the first time and uses aluminum hydroxide seed crystals to prepare an adsorbent to adsorb lithium in a lithium-rich sodium aluminate solution system, realizing efficient separation of lithium; utilizing cooling adsorption and rapid heating filtration to achieve rapid and efficient separation; through adsorption The further enrichment of lithium in the adsorbent by solvent redissolution creates favorable conditions for the subsequent extraction of lithium salts.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of inorganic chemical industry, and relates to a method for extracting high value-added lithium salt from the semen of alumina produced by Bayer method or sintering method, in particular to a method for enriching lithium from sodium aluminate solution in an alumina factory methods and systems. Background technique

[0002] Lithium carbonate, an inorganic compound with the formula Li 2 CO 3 , as colorless monoclinic crystals or white powder. Density 2.11g / cm 3 , Melting point 618℃, soluble in dilute acid, slightly soluble in water, more soluble in cold water than hot water, insoluble in alcohol and acetone. Widely used in batteries, ceramic glass, lubricants, pharmaceuticals and other industries.

[0003] Lithium carbonate is the basic material for the production of secondary lithium salts and lithium metal products, so it has become the most used lithium product in the lithium industry, and other lithiu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More