A kind of adsorption tower and method for extracting lithium from salt lake brine

Abstract

The invention discloses an adsorption tower for extracting lithium from salt lake brine, which comprises a liquid inlet located at the bottom of the adsorption tower, a liquid inlet check valve and a water distributor connected to the liquid inlet, and a liquid outlet check valve located at the top of the adsorption tower and the liquid outlet, the water distributor is evenly distributed at the bottom of the adsorption tower, and connected to the liquid inlet; the liquid outlet is evenly distributed at the top of the adsorption tower, and is respectively connected to the liquid outlet check valve; the inside of the adsorption tower Fill the manganese-based lithium ion sieve adsorbent, and the filtered salt lake brine enters the interior of the adsorption tower, so that the lithium ions in the salt lake brine are adsorbed on the manganese-based lithium ion sieve adsorbent; the eluent enters the interior of the adsorption tower , and flow out through the liquid outlet one-way valve and the liquid outlet, so that the lithium ions adsorbed in the manganese-based lithium ion sieve adsorbent are separated into the eluent to obtain an analysis solution; the analysis solution is concentrated to obtain a lithium-containing solution . The invention has simple process and easy operation, and greatly reduces the cost and time of extracting lithium.

Description

technical field [0001] The invention relates to the field of lithium ion purification, in particular to an adsorption tower for extracting lithium from salt lake brine and a method for extracting lithium. Background technique [0002] Lithium is the lightest metal element in nature, and it ranks the first among group IA alkali metals in the periodic table, and is the lightest and most active alkali metal. Because of its wide range of applications, it is known as "industrial monosodium glutamate"; and because lithium has the highest standard oxidation potential among various elements, it is the undisputed best element in the field of batteries and power supplies, so it is also called "energy metal". ". [0003] According to different raw materials, the lithium extraction process can be divided into two process routes: ore lithium extraction and brine lithium extraction. Lithium extraction from ore is the earliest process route adopted. Due to the small total reserves of lit...

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Problems solved by technology

[0004] Salt lakes in Qinghai, Tibet and other places contain relatively high lithium content. Among the current lithium extraction methods, the solar pond method is mainly used for industrial lithium extraction in Tibetan salt lakes. This method has a long production cycle from salt lake brine to lithium resource products, and usually requires It takes a long time to make statistics in units of years, which seriously affects the efficiency of lithium extraction

Qinghai Salt Lake mainly uses the aluminum-based adsorption method for industrial lithium extraction. This method requires pretreatment such as heating up the brine of the salt lake. For high-altitude and low-temperature environments, pretreatment such as heating will inevitably increase more power consumption. The concentration of the lithium-containing solution is low, and a multi-step purification process is required in the follow-up, which makes the entire extraction process time-consuming and labor-intensive

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