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Preparation method of lithium slag adsorbent for liquid extraction of lithium

A technology of adsorbent and lithium slag, which is applied in the field of preparation of lithium slag adsorbent, can solve the problems of underutilization of lithium slag, and achieve the effects of environmental protection, easy availability of raw materials, and simple preparation process

Active Publication Date: 2014-04-09
JIANGSU RONGHUI GENERAL LITHIUM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, lithium slag resources are mainly used in the building materials industry, and more than 95% of lithium slag are placed in the open air and are not fully utilized

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Take the lithium ore waste residue and pass it through a 60-mesh sieve, add water to gravity sedimentation, and dry to obtain refined lithium residue. Based on the quality of refined lithium slag, add 18% polymer binder cellulose acetate butyrate, mix at a stirring speed of 50 rpm for 20 minutes, form, dry, and roast at 550°C for 4 hours to obtain a lithium slag adsorbent. In the initial Li + In the simulated brine with a concentration of 100mg / L, the solid-to-liquid ratio is 0.5g / 100ml, and the lithium slag adsorbent has a static adsorption capacity of 6.18mg / g for lithium at 25°C.

Embodiment 2

[0018] Take the lithium ore waste residue and pass it through an 80-mesh sieve, add water to settle by gravity, and dry for 2 hours. Based on the quality of the refined lithium slag, add 16% of the active agent aluminum hydroxide, 2% of chlorinated polyvinyl chloride and 3% of distilled water, mix at a stirring speed of 50rpm for 30min, then form, dry, and roast at 550°C for 4h. Lithium slag adsorbent is prepared. In the initial Li + In the simulated brine with a concentration of 100mg / L and a solid-to-liquid ratio of 0.5g / 100ml, the static adsorption capacity of the lithium slag adsorbent for lithium at 30°C is 9.31mg / g.

Embodiment 3

[0020] Take the lithium ore waste residue and pass it through a 100-mesh sieve, add water for gravity sedimentation, and then leaching it with hydrochloric acid with a concentration of 0.5mol / L. The acid is eluted with water until the pH is 7.2, and then dried. Based on the quality of refined lithium slag, add 4% active auxiliary agent metatitanic acid H 2 TiO 3 , 6% polyethylene glycol and 18% distilled water were mixed at a stirring speed of 100rpm for 60min, then molded, dried, and roasted at 350°C for 6h to obtain a lithium slag adsorbent. In the initial Li + In the simulated brine with a concentration of 100mg / L, the solid-to-liquid ratio is 0.5g / 100ml, and the lithium slag adsorbent has a static adsorption capacity of 12.77mg / g of lithium at 30°C.

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Abstract

The invention relates to a preparation method of a lithium slag adsorbent for liquid extraction of lithium. The preparation method comprises the following steps: purifying and refining lithium slag, adding 0-20% of active assistant, 1-20% of binder and 0-20% of water, and forming and roasting to prepare the lithium slag adsorbent. The lithium slag adsorbent has good selectivity of extracting lithium resources in seawater and salt lake brine. According to the preparation method provided by the invention, raw materials are easily available, preparation process is simple and production cost is low.

Description

Technical field: [0001] The invention relates to a preparation method of a lithium slag adsorbent for extracting lithium in a liquid state, in particular to the preparation of a lithium slag adsorbent for extracting lithium from seawater and lithium-containing salt lake brine. Background technique: [0002] Lithium carbonate is the basic material for the production of secondary lithium salt and lithium metal. Driven by the growth in demand for global consumer electronics and new energy vehicles, the global demand for lithium carbonate will maintain an average annual compound growth rate of 15%-20%. At present, the development and utilization of lithium resources is no longer limited to lithium ore, and the mining of lithium ore is on the verge of exhaustion, which is far from meeting the needs of industrial production. How to extract lithium from seawater and salt lake brine has become an inevitable trend in the development of lithium resources in the future. [0003] Lithi...

Claims

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Application Information

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IPC IPC(8): B01J20/16B01J20/30C22B26/12
Inventor 王海燕林国崔群庄强
Owner JIANGSU RONGHUI GENERAL LITHIUM IND CO LTD
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