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Full-phase high-valued recycling method for lithium slag

A high-value, lithium slag technology, used in solid waste removal, sustainable waste treatment, solid waste management, etc., can solve problems such as rising spodumene prices, recycling and treatment of lithium slag single application, and restricting application development. , to achieve the effect of increasing added value, no waste gas, no solid waste discharge, and saving consumption

Active Publication Date: 2018-07-13
TIANQI XINLONG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The problem with the above-mentioned technologies and other similar existing technologies is that these technologies can only realize the low-value and single-application recycling of lithium slag
However, the price of spodumene continues to rise, making the production cost of glass fiber remain high, which limits the application development of this industry and other related industries

Method used

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  • Full-phase high-valued recycling method for lithium slag
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  • Full-phase high-valued recycling method for lithium slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] For a spodumene lithium extraction enterprise in Sichuan, the lithium slag (Li 2 O 0.3%, SO 3 6.58%, Fe 2 o 3 1.8%, SiO 2 62%, Al 2 o 3 21%), add water to adjust slurry, pulp concentration 40%, and add dispersant sodium silicate 1000 g / t lithium slag; add sodium carbonate (87.5kg / t lithium slag) to ore pulp for desulfurization reaction, control pH9.2, The pulp is leached at room temperature for 100 minutes; the desulfurized slurry enters the wet strong magnetic separator, and the strong magnetic separation adopts a rough and sweep process. The rough separation controls the magnetic field strength to 1.2T, and the sweeping control magnetic field strength is 1.5T to obtain the magnetic separation slurry and magnetic separation tailings; after magnetic separation, the obtained magnetic separation slurry is concentrated, filtered and dried to obtain a lithium pyrophyllite product for glass fiber. The filtrate obtained by filtering is used for the desulfurization react...

Embodiment 2

[0076] For a spodumene lithium extraction enterprise in Sichuan, the lithium slag (Li 2 O 0.5%, SO 3 11.05%, Fe 2 o 3 0.85%, SiO 2 55%, Al 2 o 3 21%), add water to adjust the pulp, the concentration of the pulp is 50%, and add 1500 g / t lithium slag as a dispersant sodium silicate; the pulp enters the wet strong magnetic separator. The magnetic field strength is 1.3T, and the sweeping control magnetic field strength is 1.5T to obtain magnetic separation slurry and magnetic separation tailings; add sodium carbonate (148kg / t lithium slag) to the magnetic separation slurry for reaction, control pH 10.5, and adjust the slurry at room temperature Leach for 90 minutes; then concentrate, filter and dry the obtained desulfurization slurry to obtain lithium pyrophyllite for glass fiber. The filtrate of filtering gained is regulated and controlled 68% (v / v) filtrate and be used for wet magnetic separation by water balance flow rate; Regulate and control 12% (v / v) filtrate and be us...

Embodiment 3

[0083] Lithium slag (Li 2 O 0.27%, SO 3 1.92%, Fe 2 o 3 1.13%, SiO 2 67%, Al 2 o 3 23%), add water through the mortar pump and pour into the mixing tank, control the concentration of the pulp to 30%, and add 1000 g / t lithium slag as a dispersant sodium silicate; add sodium carbonate (27kg / t lithium slag) to the pulp for desulfurization reaction , control pH 11.2, leaching for 60 minutes at room temperature; desulfurization slurry enters wet strong magnetic separator, strong magnetic separation adopts a rough and sweep process, the rough separation control magnetic field strength is 1.5T, and the sweep control magnetic field strength is 1.8T , to obtain magnetic separation slurry and magnetic separation tailings; after magnetic separation, the obtained magnetic separation slurry is concentrated, filtered and dried to obtain a lithium pyrophyllite product for glass fiber. The filtrate obtained by filtering is regulated by water balance flow rate, and 10% (v / v) of the filtr...

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Abstract

The invention provides a full-phase high-valued recycling method for lithium slag. The lithium slag is ore slag obtained after spodumene is subjected to the lithium leaching procedure for lithium extraction through a sulfuric acid method. The full-phase high-valued recycling method for the lithium slag includes the following steps that firstly, the lithium slag is subjected to size mixing and stirring, and sulfate minerals in the lithium slag are made to be in a dispersed and suspended state; secondly, matter obtained in the first step is subjected to reaction treatment and wet type magnetic separation treatment in any sequence through soluble carbonate; and thirdly, slurry obtained after treatment in the second step is concentrated, filtered and dried, pyrophyllite raw materials for glassfibers are obtained. When the full-phase high-valued recycling method for the lithium slag is used for treating the lithium slag, efficiency is high, generation of three wastes is avoided, spanning of high-valued recycling of the lithium slag is achieved, and remarkable economic benefits and environmental protection benefits are achieved.

Description

technical field [0001] The invention belongs to the field of green and environment-friendly recycling of industrial solid waste, relates to the field of comprehensive utilization of lithium slag, and specifically relates to a method for full-phase recovery of lithium slag and high-value products. Background technique [0002] The content of lithium in the earth's crust is about 0.0065%. It mainly exists in salt lake brine, spodumene, lepidolite, petalite and phosphorite, and is mainly distributed in Bolivia, Chile, China, Argentina, the United States, Australia, Russia, Canada and Serbia and other countries. [0003] Spodumene mines on the earth are mainly distributed in Australia, Canada, Zimbabwe, Congo, Brazil and China; lepidolite mines are mainly distributed in Zimbabwe, Canada, the United States, Mexico and China. In China, spodumene is mainly concentrated in Sichuan, Xinjiang, Henan and other places, and lepidolite is mainly concentrated in Jiangxi and Hunan province...

Claims

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Application Information

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IPC IPC(8): B09B3/00C04B18/04C03C1/00
CPCY02W30/91B09B3/00C03C1/002C04B18/0427
Inventor 税欣
Owner TIANQI XINLONG CO LTD
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