Resource treatment method for lithium-rich aluminum electrolyte

The technology of an aluminum electrolyte and a treatment method is applied in the resource treatment of acidic lithium-rich aluminum electrolyte and the resource treatment of lithium-rich aluminum electrolyte, and can solve the problem of increased energy consumption, low efficiency of direct leaching of inorganic acid, low economic benefit, etc. problems, to achieve the effect of reducing alkali consumption, promoting stable production and high efficiency

Active Publication Date: 2019-09-17
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In general, direct leaching with mineral acids is inefficient and usually requires pretreatment
In the leaching process, leaching at high temperature and inorganic acid will cause increased energy consumption, generate hyd

Method used

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  • Resource treatment method for lithium-rich aluminum electrolyte
  • Resource treatment method for lithium-rich aluminum electrolyte
  • Resource treatment method for lithium-rich aluminum electrolyte

Examples

Experimental program
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Effect test

Embodiment 1

[0043] A method for reclaiming lithium from an acidic lithium-rich potassium electrolyte, the method specifically comprising the following steps:

[0044] Step 1: Broken 100g of the acidic lithium-rich aluminum electrolyte, heat-treated at 960°C for 2 hours to make the material molecular ratio 3.6, and obtained product A. Cool to room temperature, and crush the product A.

[0045] Step 2: Add the crushed product A to water to make a slurry, wherein the solid-to-liquid ratio is 1:15, add 40g of aluminum nitrate to a constant temperature magnetic stirrer at 50°C for leaching for 2 hours, and filter to obtain filtrate B and filter B.

[0046] Step 3: adding sodium hydroxide to the filtrate B to adjust the pH to 7, and filtering aluminum hydroxide after reacting for 10 minutes to obtain filtrate C.

[0047] Step 4: Add 15g of sodium carbonate to filtrate C, react for 20min, and filter to obtain 12.37g of lithium carbonate and filtrate D.

[0048] Step 5: The filtrate D is concentra...

Embodiment 2

[0050] A method for recovering lithium from an acidic lithium-rich aluminum electrolyte, the method specifically comprising the following steps:

[0051] Step 1: crush 100 g of the acidic lithium-rich aluminum electrolyte, conduct heat treatment at 960° C. for 2 hours, make the material molecular ratio 3.6, obtain product A, cool to room temperature, and crush product A.

[0052] Step 2: Add the broken roasted product A into water to make a slurry, wherein the solid-to-liquid ratio is 1:10, add 20g of sodium sulfate and 25g of aluminum sulfate octadecahydrate in a constant temperature magnetic stirrer at 50°C for leaching for 2 hours, and filter to obtain Filtrate B and filter residue B.

[0053] Step 3: Add sodium hydroxide to the filtrate B to adjust the pH to 7, filter the aluminum hydroxide after reacting for 10 minutes, and obtain the filtrate C.

[0054] Step 4: Add 17g of sodium carbonate to filtrate C, react for 20min, and filter to obtain filtrate D and 10.25g of lit...

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Abstract

The invention relates to a resource treatment method for a lithium-rich aluminum electrolyte. The method comprises the following steps: firstly performing heat treatment on the lithium-rich aluminum electrolyte to obtain a product A; performing leaching treatment on the roasting product A with a water-soluble inorganic salt as a leaching agent in water, and performing filtering to obtain a filter residue B and a filtrate B; adding an alkali or an aqueous solution of the alkali to the filtrate B to remove aluminum ions in the filtrate B to obtain a filtrate C; and adding a water-soluble carbonate or an aqueous solution of the carbonate to the filtrate C to make lithium ions in the filtrate C be converted into lithium carbonate precipitation, and then performing filtering to obtain lithium carbonate and a filtrate D. The technical problem perplexing aluminum electrolysis industry of rich and high content lithium in an excess aluminum electrolyte and inefficient utilization of valuable metals is solved, the economic benefit is improved, and stable production of an electrolytic aluminum enterprise is promoted.

Description

technical field [0001] The invention relates to a recycling treatment method of a lithium-rich aluminum electrolyte, in particular to a recycling treatment method of an acidic lithium-rich aluminum electrolyte, and belongs to the technical field of metallurgical waste treatment. Background technique [0002] In recent years, some electrolytic aluminum enterprises in my country have faced high lithium impurities contained in alumina raw materials, which have continuously accumulated in the aluminum electrolyte, resulting in a corresponding substantial increase in the lithium content in the aluminum electrolyte. It is generally believed that the enrichment amount of lithium salt at 1~3wt% is beneficial to reduce the primary crystal temperature of the aluminum electrolyte, and the enrichment amount above 5wt% will affect the condition of the aluminum electrolytic cell to a certain extent, and the enrichment amount of lithium salt in some electrolytic aluminum enterprises Even r...

Claims

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Application Information

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IPC IPC(8): C01D15/08C01D9/00C01D5/00C01F7/34C01F7/54C01F11/22
CPCC01D5/00C01D9/00C01D15/08C01F7/34C01F7/54C01F11/22C01P2002/72
Inventor 吕晓军韦茗仁韩泽勋孙启东王维维
Owner CENT SOUTH UNIV
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