Device for producing spodumene and preparation process

Abstract

The invention discloses a device for producing spodumene and a preparation process. The device comprises a coarse particle suspension preheater, a rotary kiln, a separating valve and a leakage-free grate type cooling machine which are sequentially connected. The preparation process comprises the steps of preheating by adopting the coarse particle suspension preheater, roasting and transforming by adopting the rotary kin, separating by adopting the separating valve, and cooling by adopting the leakage-free grate type cooling machine. According to the device, by designing the coarse particle suspension preheater, tail gas of the rotary kiln is fully utilized for preheating, thus the energy consumption is reduced; by adopting the separating valve, the spodumene discharged out from the kiln can be effectively separated, and the safe and smooth operation of the whole system is ensured; by adopting the leakage-free grate type cooling machine, an optimal cooling effect can be achieved, and heat carried away by the spodumene discharged out from the kiln is fully utilized, thus the energy consumption of the system is reduced. The device realizes large-scale production and central automatic operation control of the spodumene, thereby greatly increasing the labor productivity and being better in economic benefit and environment protection benefit.

Description

technical field [0001] The invention relates to the field of spodumene production, in particular to a spodumene production device and a preparation process. Background technique [0002] Before the spodumene is acidified, it needs to be roasted and transformed, that is, converted from α-spodumene to β-spodumene. At present, most of the spodumene roasting transformation technologies commonly used in China use rotary kiln roasting transformation alone; the spodumene roasting transformation requires a relatively long roasting time, which is not suitable for fast burning and rapid burning, and the length of the firing zone of the rotary kiln is the same as the flame of the burner. The field adjustment range is related. The rotary kiln with the suspension preheater outside the kiln is usually 8-10 times the diameter of the rotary kiln, and the dry-process hollow rotary kiln is usually 5-7 times the diameter of the rotary kiln. Combined with this feature, under the premise o...

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Problems solved by technology

Combined with this feature, under the premise of a certain kiln diameter and slope, in order to ensure the roasting transition time, the rotation speed of the rotary kiln can only be reduced appropriately, and the number of times and lifting height of the spodumene material in the rotary kiln will be reduced. This reduces the probability of conductive heat transfer and convective heat transfer when the material is in contact with high-temperature airflow. Therefore, using the existing separate rotary kiln roasting conversion technology for spodumene roasting treatment cannot greatly increase the production capacity of a single system

At the same time, the existing rotary kiln roasting conversion technology is used alone. The waste heat in the exhaust gas of the rotary kiln and the large amount of heat taken away by the spodumene after transformation have not been recycled, and the energy consumption is very high.

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