Continuous Atmosphere Protection Production Line for High Temperature Lithium Iron Phosphate Calcination

Abstract

The invention discloses a protection production line for a continuous lithium iron phosphate high-temperature calcination atmosphere, and aims to overcome the defects, mentioned in the background art, in the conventional lithium iron phosphate solid-phase preparation process. The protection production line comprises a feed conveyor, a discharge conveyor, a feed airlock module, a heating furnace and a discharge airlock module. The protection production line has the advantages that the structure of a push rod furnace is adopted, the inlet and the outlet of a hearth are equipped with the airlock modules, the rear section of a surface body is equipped with a forced water-cooling section, and material filling adopts a multi-layer sagger stacking manner, so that the calcination process can be kept in a static and stable atmosphere.

Description

technical field [0001] The invention relates to a continuous production line, in particular to a continuous lithium iron phosphate high-temperature calcination atmosphere protection production line designed for the solid-phase preparation of lithium iron phosphate (LiFePO4) in battery positive electrode materials. Background technique [0002] Take the current extremely hot LiFePO4 (lithium iron phosphate) solid-phase preparation process as an example. At present, box furnaces, mesh belt furnaces, drum kilns, etc. are commonly used. [0003] Box furnaces are only suitable for intermittent production in small batches, and the economy is extremely low. [0004] The mesh belt furnace is affected by the transmission form, the output of a single device is small, and the consumption of protective gas is large. [0005] The drum kiln can meet the continuous production of large batches, but the mixing material is in direct contact with the inner wall of the drum. If the selected c...

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Problems solved by technology

[0005] The drum kiln can meet the continuous production of large batches, but the mixing material is in direct contact with the inner wall of the drum. If the selected carbon source melts or precipitates viscous substances during pyrolysis, it will affect the life of the equipment and the uniformity of the material; the synchronization of the materials cannot be guaranteed during the advancing process. , the product uniformity is not good; the proportion of material space is small, and the energy consumption rate is high

[0006] Affected by the heat treatment process and equipment factors, the output, quality and production cost of such products cannot be considered at the same time

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