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A kind of method for efficiently extracting spodumene

A spodumene, high-efficiency technology, applied in chemical instruments and methods, process efficiency improvement, lithium carbonate;/acid carbonate, etc., can solve waste, unfavorable green environmental protection, waste-free production, energy waste, etc. problem, to achieve the effect of high recovery rate

Active Publication Date: 2022-07-12
刘常慧
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Spodumene, except for lithium, is a waste of other elements; therefore, a large amount of insoluble gangue and neutralization slag are produced in the process of lithium extraction by sulfuric acid method, which is not conducive to the current green, environmentally friendly and waste-free production; and the energy waste in the two roasting processes is serious

Method used

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  • A kind of method for efficiently extracting spodumene
  • A kind of method for efficiently extracting spodumene
  • A kind of method for efficiently extracting spodumene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Grind spodumene to a fineness of -200 mesh 80%, stir and mix with soluble alkali (sodium hydroxide) at a weight ratio of 1:1, alkalize and roast at 700 degrees for 50 minutes, and place the roasting clinker at 5% Alkali quenching is carried out in the sodium hydroxide lye solution, and enters the spiral classifier for pre-inspection and classification. The coarse-grained grade returns to the ball mill for grinding, the overflow enters the cyclone for secondary classification, and the underflow of the cyclone enters the ball mill for regrinding. Overflow to obtain -325 mesh 75% alkaline leaching pulp; the pulp is subjected to 4000Gs weak magnetic separation to select high magnetic iron minerals, and after weak magnetic separation, the pulp is subjected to 12000Gs strong magnetic separation to obtain strong magnetic concentrate and pulp A; strong magnetic coarse concentrate The ore is transported to the stirring tank, and water is added for slurry mixing to prepare a slurr...

Embodiment 2

[0072] Grind spodumene to a fineness of -200 mesh 80%, stir and mix with soluble alkali (sodium hydroxide) at a weight ratio of 1:1, alkalize and roast at 820 degrees for 50 minutes, and place the roasting clinker in a 5% Alkali quenching in sodium hydroxide lye solution, entering into the spiral classifier for pre-inspection and classification, the coarse-grained grade is returned to the ball mill for grinding, the overflow enters the cyclone for secondary classification, the underflow of the cyclone enters the ball mill for regrinding, and the cyclone overflows. 75% alkaline leaching pulp of -325 mesh is obtained; the pulp is subjected to 4000Gs weak magnetic separation to select high magnetic iron minerals. After weak magnetic separation, the pulp is subjected to 12000Gs strong magnetic separation to obtain strong magnetic concentrate and pulp A; strong magnetic coarse concentrate It is transported into the stirring tank, and water is added for slurry mixing to prepare a slu...

Embodiment 3

[0080] Grind spodumene to a fineness of -200 mesh 80%, stir and mix with soluble alkali (sodium hydroxide) at a weight ratio of 1:1, alkalize and roast at 940 degrees for 50 minutes, and place the roasting clinker in a 5% Alkali quenching in sodium hydroxide lye solution, entering into the spiral classifier for pre-inspection and classification, the coarse-grained grade is returned to the ball mill for grinding, the overflow enters the cyclone for secondary classification, the underflow of the cyclone enters the ball mill for regrinding, and the cyclone overflows. 75% alkaline leaching pulp of -325 mesh is obtained; the pulp is subjected to 4000Gs weak magnetic separation to select high magnetic iron minerals. After weak magnetic separation, the pulp is subjected to 12000Gs strong magnetic separation to obtain strong magnetic concentrate and pulp A; strong magnetic coarse concentrate It is transported into the stirring tank, and water is added for slurry mixing to prepare a slu...

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Abstract

The invention relates to a method for efficiently extracting spodumene, which is characterized in that spodumene and alkali are roasted at a temperature of 800-900 DEG C for 30-120 minutes to obtain clinker; the clinker is in water or an alkaline solution Water quenching is carried out in the middle, or the clinker is cooled and then ground to extract tantalum-niobium ore, white carbon black and lithium carbonate. In this application, the temperature in the roasting stage is 200-300°C lower than the transformation temperature of spodumene, and the re-roasting of β-crystal spodumene and sulfuric acid at 250-300°C is cancelled, which greatly reduces energy consumption; Circulation, only adding sulfuric acid and quicklime, can get lithium carbonate, white carbon black, aluminum hydroxide, calcium sulfate and iron waste slag of cement factory for sale, basically no waste. By adopting the method, all elements in the spodumene concentrate can be comprehensively recovered, and the cost is low, and it is especially suitable for the reconstruction of the spodumene sulfuric acid smelter.

Description

technical field [0001] The invention relates to a method for efficiently extracting spodumene. Background technique [0002] Domestic salt lakes have high levels of magnesium and lithium. In the process of extracting lithium from brine, magnesium and lithium ions are difficult to separate, which makes it difficult to produce lithium salt from brine for forestry. Moreover, the content of lithium in brine varies greatly, which causes great difficulties in production and mining. [0003] At present, domestic lithium salts are mainly extracted from spodumene and lepidolite. In the process of extracting lithium from spodumene, the sulfuric acid method is mostly adopted. After spodumene is roasted at 950-1100 °C, α spodumene is transformed into β crystal spodumene, which destroys the internal lattice structure of spodumene and increases chemical activity. ; β-crystal spodumene is mixed with sulfuric acid and acidified and roasted again at 250-300 ° C, and a replacement reaction o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01D15/08C01F11/46C01B33/143C01B33/141C01B33/148C01F7/34C22B1/02C22B34/24C22B3/12
CPCC01D15/08C01F11/46C01F11/468C01B33/143C01B33/141C01B33/148C01F7/34C22B1/02C22B34/24C22B3/12Y02P10/20
Inventor 刘常慧
Owner 刘常慧