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High-valued comprehensive utilization method of lithium slag

A technology for lithium slag and tailings, which is applied in the field of high-value green comprehensive utilization and treatment of lithium slag, can solve the problems of single application of lithium slag, such as recovery and treatment, limited application development, high price of spodumene, etc., and achieves increased added value. , the effect of saving usage and low cost

Active Publication Date: 2018-06-12
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 high price of spodumene makes 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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  • High-valued comprehensive utilization method of lithium slag
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  • High-valued comprehensive utilization method of 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 grams / ton lithium slag; Ore pulp enters desulfurization process, at first ore pulp enters flotation desulfurization, what flotation collector adopts is oleic acid, The flotation process adopts primary roughing and secondary sweeping. The dosage of oleic acid for roughing collector is 100g / ton lithium slag, the amount of oleic acid collector for primary sweeping is 50g / ton lithium residue, and the amount of oleic acid for secondary sweeping is The amount of oleic acid collector is 50g / ton of lithium slag, the foamed product of flotation is used as gypsum putty, and the non-foamed product of flotation operation enters the wet strong magnetic separator. Control the magnetic field strength to 1.2T, sweep and control the magnetic field str...

Embodiment 2

[0077] 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 slurry, pulp concentration 50%, and add dispersant sodium silicate 1500 g / t lithium slag; ore pulp enters desulfurization process, first ore pulp enters hydrocyclone for gravity separation, and the specific gravity obtained by gravity separation is relatively Larger products enter flotation desulfurization, the flotation collector uses dodecylamine, the flotation process adopts one roughing and two sweeping, and the amount of roughing collector dodecylamine is 50g / ton of lithium slag , the amount of dodecylamine used as a collector in the first sweep is 25g / ton of lithium slag, and the dosage of dodecylamine in the second sweep is 10g / ton of lithium slag. As gypsum putty, the non-foam product of flotation operation enters the strong magnetic separator, and what the strong magnetic separation adopts is a...

Embodiment 3

[0084] 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 to adjust the slurry and pour it into the mixing tank to control the concentration of the ore slurry to 30%. The ore slurry enters the flotation column for flotation. Lithium slag is 50g / ton, and the amount of oleic acid used as a collector in one sweep is 20g / ton lithium slag. The non-foam products obtained by flotation enter the strong magnetic separator. The control magnetic field strength is 1.5T, and the sweeping control magnetic field strength is 1.8T. After magnetic separation, the obtained magnetic separation slurry is concentrated, filtered and dried to obtain a lithium pyrophyllite product for glass fiber. The specific product parameters are shown in Table 3.

[0085] table 3

[0086]

[0087] Note: the market price of the cement admixture obtained in this embodiment is about 50 yuan / ton, and the market price of the obtained gypsum put...

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Abstract

The invention provides a high-valued comprehensive utilization method of lithium slag, in particular to mineral waste residues obtained by lithium extraction of spodumene by a sulfuric acid method. The high-valued comprehensive utilization method comprises the following steps: firstly, carrying out size mixing and stirring on the lithium slag and enabling sulfate mineral in the lithium slag to bein a dispersed suspension state; secondly, carrying out desulfurizing treatment on a product obtained in the first step by using a physical ore dressing mode to obtain desulfurized slurry and tailingdiscarding produced slag and enabling the sulfur content of slag phase in the desulfurized slurry to be smaller than or equal to 0.5 percent; thirdly, under the condition that the magnetic field strength is 0.5 to 2.0T, carrying out magnetic separation on the desulfurized slurry obtained in the second step to obtain magnetic separation slurry and magnetic separation tailings and reducing the content of ferric oxide in the magnetic separation slurry to be smaller than or equal to 0.05 percent; then concentrating, filtering and drying the obtained magnetic separation slurry to obtain a pyrophyllite raw material for glass fibers. The treatment method of the lithium slag, disclosed by the invention, has the advantages of greenness and environmental protection, obvious economic benefits and capability of realizing the leap of high-valued recycling of the lithium slag.

Description

technical field [0001] The invention belongs to the field of green and environment-friendly resource disposal of industrial solid waste, relates to the field of comprehensive utilization of lithium slag, and in particular relates to a high-value green comprehensive utilization treatment method of lithium slag. 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C6/02C03C13/00C04B18/14
CPCC03C1/00C03C13/00C04B18/141C04B2103/0008C04B18/0481C04B28/02C04B28/14C04B14/42C04B5/00C04B20/023C03C1/002C03C3/083C03C13/06Y02W30/91
Inventor 税欣
Owner TIANQI XINLONG CO LTD
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