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Spodumene roasting transformation method

A spodumene and roasting technology, which is applied in the direction of aluminum silicate, silicate, energy input, etc., can solve the problems of low production capacity and waste of resources, and achieve the effects of increasing production, reducing costs, and increasing application value

Inactive Publication Date: 2015-04-15
CHENGDU ZENITH MECHANICAL ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for the transformation of spodumene roasting aimed at the deficiencies of the prior art, which solves the problem of low production capacity and low resource utilization caused by the transformation of spodumene in the prior art by using a rotary kiln. waste problem

Method used

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  • Spodumene roasting transformation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Pretreat domestic spodumene raw ore, that is, dry it in a hammer dryer to a water content of 3%, and then grind it until the spodumene fineness is below 100 mesh; among them, domestic spodumene The chemical composition of Shiyuan ore is: Li 2 O 5.0, Fe 2 o 3 2.4, K 2 O 0.21, Na 2 O 0.57, Al 2 o 3 22.7, SiO2 2 64.0, CaO 1.2, MnO 0.2 and water 13.0.

[0022] (2) Then place it in the cyclone preheating system for suspension preheating, the steps of suspension preheating are:

[0023] i. The pretreated spodumene is transported from the hammer dryer 6 to the primary cyclone 1, and after being collected by the primary cyclone 1, it is transported by the primary material pipeline 101 to the primary hot air pipeline 102 for suspension pretreatment heat, and then the material is brought to the secondary cyclone 2 by the hot blast in the hot blast duct;

[0024] Ⅱ. The secondary cyclone 2 collects the material and transports it from the secondary material pipeline...

Embodiment 2

[0029] (1) Pretreat the Australian lithium concentrate, that is, dry it in the hammer dryer 6 to a water content of 1%, and then grind it until the spodumene fineness is below 100 mesh; wherein, its chemical composition For: Li 2 O 6.0, Fe 2 o 3 0.50,K 2 O 0.30, Na 2 O 0.25, Al 2 o 3 22.0, SiO 2 68.0, CaO 0.25, MnO 0.10, TiO 2 0.10,P 2 o 5 0.20 and water 6.0.

[0030] (2) Then place it in the cyclone preheating system for suspension preheating, the steps of suspension preheating are:

[0031] i. The pretreated spodumene is transported from the hammer dryer 6 to the primary cyclone 1, and after being collected by the primary cyclone 1, it is transported by the primary material pipeline 101 to the primary hot air pipeline 102 for suspension pretreatment heat, and then the material is brought to the secondary cyclone 2 by the hot blast in the hot blast duct;

[0032] Ⅱ. The secondary cyclone 2 collects the material and transports it from the secondary material pi...

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Abstract

The invention discloses a spodumene roasting transformation method. The method is characterized by comprising three steps, namely pretreatment of raw spodumene, suspended preheating of the pretreated spodumene and heating transformation in a rotary kiln. The material is preheated before transformation by adopting a cyclone preheating system and using the waste heat of the rotary kiln, the material route and the hot air route of the system are reverse, and the material is heated by using the hot air in the rotary kiln, so that the waste gas temperature in the rotary kiln is reduced to be less than 150 DEG C; and the functions of the rotary kiln are shifted out, so that roasting of the material in the rotary kiln is ensured, the yield of the rotary kiln is greatly improved at the same time, the waste resource of the rotary kiln is fully utilized, the cost is reduced, the problem of the capacity of the single system is solved, and great application value is realized.

Description

technical field [0001] The invention specifically relates to a method for roasting and transforming spodumene. Background technique [0002] Spodumene needs to be converted before acidification treatment, that is, α-spodumene is converted into β-spodumene; most domestic conversion technologies use rotary kiln roasting conversion; spodumene conversion requires a relatively long roasting time, which is not suitable for rapid burning . The firing zone length of the rotary kiln is related to the adjustment range of the burner flame length. The kiln with preheater is usually 8-10 times the diameter of the rotary kiln, and the dry hollow rotary kiln is usually 5-7 times the diameter of the rotary kiln. In view of this feature, in the case of a certain kiln diameter and inclination (set kiln inclination angle α = 2°), in order to ensure the roasting time, the kiln speed can only be reduced appropriately, and as the kiln speed decreases, the number of material tumbling times is red...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/26
CPCY02P20/129
Inventor 马永全黄琳
Owner CHENGDU ZENITH MECHANICAL ELECTRONICS CO LTD
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