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A high-value comprehensive utilization method of lithium slag

A technology of lithium slag and tailings, which is applied in the field of high-value green comprehensive utilization of lithium slag, can solve the problems of single-application recycling of lithium slag, limited application development, and high price of spodumene, so as to increase added value , saving usage, low cost effect

Active Publication Date: 2018-12-11
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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  • A high-value comprehensive utilization method of lithium slag
  • A high-value comprehensive utilization method of lithium slag
  • A high-value 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-value comprehensive utilization method of lithium slag, which is aimed at the slag obtained after lithium extraction of spodumene by sulfuric acid method, which comprises the following steps: (1) slurrying and stirring the lithium slag, Make the sulfate minerals in the lithium slag be in a dispersed suspension state; (2) adopt the physical beneficiation method to carry out desulfurization treatment to the resultant of step (1) to obtain the desulfurization slurry and the tailing output slag, so that the slag phase in the desulfurization slurry Sulfur content is not higher than 0.5%; (3) under the condition that the magnetic field strength is 0.5~2.0T, carry out magnetic separation to the desulfurization slurry obtained in step (2), obtain magnetic separation slurry and magnetic separation tailings, make magnetic separation The ferric oxide content in the slurry is reduced to no more than 0.5 percent; then the obtained magnetic separation slurry is concentrated, filtered and dried to obtain the pyrophyllite raw material for glass fiber. The lithium slag treatment method of the present invention is green and environment-friendly, realizes a leap forward in high-value recycling of lithium slag, and has significant economic benefits.

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 Patents(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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