Method for preparing low-Fe alpha-type spodumene using high-Fe spodumene

A spodumene, high-speed iron technology, applied in aluminum silicate, silicate, alkali metal silicate and other directions, can solve the problems of uneconomical, high cost, low yield and so on

Inactive Publication Date: 2005-07-20
AOKAIYUAN SCI & TECH DEV BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the flotation method is used to produce low-iron α-type spodumene, the yield is low, the cost is high, and it is economically uneconomical

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Select 500kg of Australian high-iron spodumene ore, whose crystal structure is α-type, in which Fe 2 o 3 Content 0.45% (weight), Li 2 The O content is 6.2% (weight), the water content is 5% (weight), and the particle size is less than or equal to 10 mm. The above-mentioned spodumene ore is dried with a coal-fired drying bed, and the drying area of ​​the drying bed is 10.6m 2 , the flue gas inlet temperature is 500-900°C, the flue gas outlet temperature is 60-85°C, and the water content of the dried spodumene after drying is about 1.0%. Sieve the dry spodumene with a motor vibrating screen with a sieve bed area of ​​1m 2 , the screen mesh is 16 mesh (0.991mm), and the amplitude is ±2mm. After sieving, 297.88 kg of fine spodumene under the 16-mesh sieve and 174.94 kg of coarse spodumene on the 16-mesh sieve were obtained. The spodumene under the sieve is added to the permanent tape type magnetic separator, the bandwidth of the permanent tape type magnetic separator i...

Embodiment 2

[0027] Grinding 174.94 kg of coarse spodumene on the sieve screened by an electrode vibrating sieve into fine spodumene below 16 meshes in Example 1, repeating the magnetic separation steps in Example 1 to obtain low-iron α-type lithium Pyroxene 168.84kg, of which Fe 2 o 3 Content 0.2%, Li 2 O content 6.2%.

[0028] Embodiment 1 adds the total output rate of the low-iron spodumene that embodiment 2 obtains to 92.78%, Li 2 The overall recovery of O was 95.41%.

Embodiment 3

[0030] Select 500kg of Australian high-iron spodumene ore, whose crystal structure is α-type, in which Fe 2 o 3 Content 0.8% (weight), Li 2 The O content is 5% (weight), the water content is 5% (weight), and the particle size is less than or equal to 10 mm. The above-mentioned spodumene ore is dried with a coal-fired drying bed, and the drying area of ​​the drying bed is 10.6m 2, the flue gas inlet temperature is 500-900°C, the flue gas outlet temperature is 60-85°C, and the water content of the dried spodumene after drying is about 1.0%. Sieve the dry spodumene with a motor vibrating screen with a sieve bed area of ​​1m 2 , the screen mesh is 24 mesh, and the amplitude is ±2mm. The spodumene under the sieve is added to the permanent tape type magnetic separator. The bandwidth of the permanent tape type magnetic separator is 800mm, the length of the tape is 800mm, the magnetic field strength is 18000 Oersted, and the feeding speed is 600kg / h. The iron slag is separated and...

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Abstract

In a dry magnetic separator and under magnetic field intensity of 8000-20000 oersted, 10-60 mesh sieved high-iron spodumene ore powder with Fe2O3 content as high as 1.2 wt% is selected magnetically to obtain low-iron alpha-type spodumene ore powder with Fe2O3 content reduced to 0.13-0.20 wt% while maintaining Li2O content unchanged basically. The said process can produce low-grade high-iron spodumene ore powder into low-iron alpha-type spodumene ore powder for use in glass industry.

Description

technical field [0001] The invention relates to a processing method of spodumene ore, in particular to a method for preparing low-iron α-type spodumene from high-iron spodumene ore. Background technique [0002] Spodumene is a lithium-aluminosilicate mineral with the molecular formula Li 2 O.Al 2 o 3 .4SiO 2 . Theoretical Li of pure spodumene 2 The maximum value of the O content is 8%. The naturally occurring spodumene ore is α-type spodumene. When it is heated to about 1082°C, an irreversible phase transition occurs to generate β-type spodumene. At the same time, with a volume increase of 30%, its specific gravity Reduced from 3.2 to 2.4. In the temperature range from 25°C to 1000°C, β-type spodumene has a very low coefficient of thermal expansion, about 1×10 -6 / °C. Spodumene is mainly used in the manufacture of glass and ceramics. Among them, α-type spodumene can be used as an additive for glass manufacturing, and β-type spodumene can be used as an additive for c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/26C01B33/32
Inventor 冯秀伟甘炤坤高问杰洪砚钟
Owner AOKAIYUAN SCI & TECH DEV BEIJING
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