Carbonic acid rare earth roasting method

Abstract

The invention discloses a carbonic acid rare earth roasting method. A roasting system is used to roast and comprises a feeding steel platform, a first feed screw, a cyclone separator, a pulsed jet cloth filter, a drying rotary kiln, a second cyclone separator, a tail gas induced draft fan, an emptying pipe, a second feed screw, a pipe fitting, a feed screw, a breather pipe, a roasting device and ajacket water cooling conveyor; a feeding inlet is arranged at the top part of the first feed screw; the top part of the second feed screw communicates with the feed screw through the pipe fitting; the bottom part of the tail end of the roasting device is connected with the jacket water cooling conveyor; a transmission mechanism and a supporting wheel are respectively arranged at the bottom partsof the drying rotary kiln and the roasting device; and the drying rotary kiln and the roasting device are provided with gears matched with the transmission mechanism. The invention provides the carbonic acid rare earth roasting method, the roasting period is short, the production efficiency is improved, and the high energy consumption is reduced.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to a roasting method of rare earth carbonate. Background technique [0002] The existing rare earth roasting technologies are mainly clay kiln roasting and tunnel kiln roasting. Soil-packed kiln roasting technology needs to manually put rare earth carbonate into a bowl and place it in the soil-packed kiln for roasting. After the roasting is completed, it needs to wait for the temperature to drop. When the temperature drops to room temperature, artificial vibrating sieves are used to filter, and the mixture is mixed by a mixer before bagging. Tunnel kiln roasting technology is to put rare earth carbonate materials into a bowl and put them on the push plate. The push plate enters the tunnel kiln for roasting through the tunnel kiln track. After the roasting is completed, it needs to wait for the temperature to drop, and the temperature drops to room temperature. After mixing by ...

AI Technical Summary

Problems solved by technology

[0003] Whether it is earth bag kiln roasting or tunnel kiln roasting, they are all roasted in old-fashioned kilns. Old-fashioned kilns are static roasting. The heat source provided is uneven and the roasting process needs to give priority to heating the bowl containing rare earth materials, and then the bowl absorbs heat to heat and roast the material. , due to the large number of bowls and the large energy consumption, a large number of bowls will be damaged every time roasting

Moreover, there are problems such as the need to manually load the materials that need to be roasted, the roasting cycle is long, the production efficiency is low, and the energy consumption is large.

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