Rotary calcination device and rotary calcination process

Abstract

The invention discloses a rotary calcination device and a rotary calcination process. The rotary calcination device comprises static state soaking devices, heating tubes, sealing devices, a rotating device, and a conveying device, wherein the sealing devices are arranged at the two ends of the rotating device, the conveying device used for conveying materials passes through the sealing devices and conveys the materials to the rotating device, the static state soaking device is arranged on the outer side of each sealing device, the two static state soaking devices are connected through the heating tubes axially penetrating through the rotating device, the heating tubes are arranged at the lower half part of the rotating device and are separately fixed, and the heating tubes do not rotate along with a kiln body. The heating tubes are only distributed at the lower half part of the interior of a kiln and occupy 40%-60% of the space of the kiln, and only about half of the heating tubes are distributed in the kiln, so that the material is saved, the handling capacity is hardly affected, and the equipment investment cost is greatly lowered.

Description

[0001] technical field [0002] The invention relates to a rotary roasting device and a process, in particular to a device and a process of a medium-low temperature rotary roasting kiln. Background technique [0003] The medium and low temperature rotary roasting kiln can be adapted to the roasting of various industrial raw materials because of its good mixing performance and efficient heat transfer capacity. [0004] However, most of the current rotary roasting kilns have the following problems at a temperature of 0-600 °C: some do not add a copying board, the material moves at the bottom of the kiln, the heating surface is limited and the heating is uneven; the heating medium (flue gas, etc.) and the material Direct contact will bring secondary pollution to the material, which is not conducive to the purification of the reaction and roasted products, and at the same time increases the amount of exhaust gas; in the rotary kiln equipped with heating tubes, the tubes are ...

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Problems solved by technology

[0004] However, most of the current rotary roasting kilns have the following problems at a temperature of 0-600 °C: some do not add a copying board, the material moves at the bottom of the kiln, the heating surface is limited and the heating is uneven; the heating medium (flue gas, etc.) and the material Direct contact will bring secondary pollution to the material, which is not conducive to the purification of the reaction and roasted products, and at the same time increases the amount of exhaust gas; in the rotary kiln equipped with heating tubes, the tubes are generally fixed on the kiln wall and rotate together with the kiln, and the distribution Filling most of the space in the kiln increases the difficulty of sealing, resulting in a complex sealing structure, and when individual tubes break, the kiln must be stopped to deal with it, which is not conducive to daily maintenance and increases costs, etc.

[0005] The existence of these problems has led to unstable product quality, low equipment operation rate, high energy consumption and high cost

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