Method and device for calcinating needle coke with rotary kiln

Abstract

The invention discloses a method and device for calcinating needle coke with a rotary kiln. The method makes use of a rotary kiln to calcinate needle coke, so that a violent thermal shock generated during green coke's entrance into existing rotary hearth calciners can be avoided, and the calcinated coke has greatly reduced brittleness, thus enhancing the content of coarse particles in modern large-specification electrode production. The device comprises a rotary kiln (1), the feed inlet of which is provided with a feeding device and an ash settling chamber. The discharge port of the rotary kiln is in connection with the feed inlet of a cooling machine (3) adopting dual cooling through an electric elephant trunk (2). The cooling machine is connected to a waste gas treatment system (4). The rotary kiln is driven to rotate by a variable frequency motor (5). The discharge port of the rotary kiln is provided with a double-frequency conversion blower (6). By employing the method and the device of the invention, the quality of calcinated coke can be improved, the investment can be reduced, the running rate can be high, automatic control is easy to realize, and the labor intensity of workers can be lowered.

Description

technical field [0001] The invention relates to a method and device for calcining needle coke with a rotary kiln, belonging to a method and device for calcining needle coke as a raw material in graphite electrode production. Background technique [0002] With the continuous development of the electrode industry and other carbon industries, the specifications of the electrodes are constantly increasing, and the quality requirements are getting higher and higher, and the quality requirements for the raw material needle coke are also getting higher and higher. As an important part of calcination in the production of electrode raw material needle coke, the mainstream calcination equipment currently used in this industry at home and abroad is the rotary bed type calcination furnace. Great improvement, low energy consumption, high yield of fixed carbon, and small dust emission. However, the disadvantage of calcining needle coke in a rotary bed calciner is that the raw coke enteri...

AI Technical Summary

Problems solved by technology

However, the disadvantage of calcining needle coke in a rotary bed calciner is that the raw coke entering the calciner is subject to severe thermal shock, which makes the content of coarse particles in the production of large-scale electrodes very low, resulting in very brittle coke after calcining, which affects the quality of large-scale electrodes. quality

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