Acidification roasting device for increasing conversion rate of lithium carbonate and production method of acidification roasting device

Abstract

The invention discloses an acidification roasting device for increasing the conversion rate of lithium carbonate and a production method of the acidification roasting device. The device comprises fixing plates, reinforcing ribs, connecting pins, connecting buckles and iron chains, wherein the fixing plates consist of bases and vertical plates; the vertical plates are vertically welded on the bases; ends, far away from the bases, of the vertical plates, take the shape of a semicircle; pin holes are formed in the ends; the reinforcing ribs are inverted V-shaped reinforcing steel bars; angle endsof the reinforcing ribs prop against two side surfaces of the vertical plates and are welded with the fixing plates in a manner of fitting with the bases; tail ends of the reinforcing ribs exceed thebases for a part; the iron chains consist of multiple iron rings in connection; the tail ends of the iron chains are hung with the connecting buckles; the connecting buckles are moveably connected with the fixing plates through connecting pins; a plurality of fixing plates are provided; bottom surfaces of the fixing plates are vertically welded with a roasting rotary kiln cylinder; the fixing plates are uniformly distributed on the cylindrical inner wall of a rotary kiln; and distances among the fixing plates are equal to both axial distances and chordal distances on a cylindrical surface. When the rotary kiln is rotated, materials are turned over by the iron chains and at the same time pushed to move forwards, the conversion rate of the lithium carbonate can be effectively increased, andthe yield can be increased.

Description

technical field [0001] The invention belongs to the technical field of lithium carbonate extraction, and in particular relates to an acidification roasting device for improving the conversion rate of lithium carbonate and a production method thereof. Background technique [0002] Lithium carbonate is a key raw material for the production of cathode materials for lithium batteries, mainly including lithium cobalt oxide, lithium manganese oxide, lithium iron phosphate, etc., which have good chemical properties and their application fields are still expanding. Today, with the rapid development of the electric vehicle industry at home and abroad, the demand for lithium batteries for electric vehicles is increasing day by day. An electric vehicle needs about 45 kilograms of battery-grade lithium carbonate. It can be expected that the broad development prospects of electric vehicles will also increase the demand for battery-grade lithium carbonate. Lithium carbonate is also used ...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the equipment used by my country's lithium carbonate production enterprises in the acidification and roasting process is an ordinary roasting rotary kiln. The conversion rate of lithium carbonate is low, only 83-85%, and a lot of lithium resources are wasted virtually.

The reason for the low conversion rate of lithium acidification roasting is that the wet material after acid mixing enters the roasting rotary kiln without turning over, only the surface layer of material reacts, and part of the deep layer of material does not participate in the reaction, resulting in low conversion rate of lithium carbonate; wet material does not turn over Material, the fluidity to the discharge port is not good, affecting the output

Some enterprises inlaid the uneven brick surface in the roasting rotary kiln, so that the material can be turned over. Although the conversion rate of lithium carbonate has increased, the wet material will adhere to the convex surface, and after a certain period of time, a huge material will be formed on the convex surface. Pile, seriously affecting the forward movement of materials, and difficult to clean up

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