Tunnel kiln for calcining petroleum coke and method for calcining petroleum coke by using tunnel kiln

Abstract

The invention provides a tunnel kiln for calcining petroleum coke and a method for calcining the petroleum coke by using the tunnel kiln. Automatic doors are arranged respectively at two ends of the kiln, an automatic inner door is arranged inside the kiln, gradually widened and gradually narrowed tunnel steps are arranged inside the kiln, and a gas boaster communicating with a volatile region, a heating-up region and a high-temperature region respectively is arranged outside the kiln. Petroleum coke raw materials are loaded into a bowl tool, are carried into the tunnel kiln by a kiln car, and are sent out of the kiln after passing through a preheating section, a calcination section and a cooling section. The Petroleum coke raw materials are fed into the calcination section after the dehydration processing in the preheating section, the calcination time in the heating-up region, the high-temperature region and a constant high temperature region is 320-640 minutes, wherein the temperature in the high-temperature region is in the range form 1050 DEG C to 1600 DEG C, and the pressure born by the calcination section is 5-10 Pa. Raw material volatile gases in the volatile region are introduced into the heating-up region and the high-temperature region after a calcination temperature is reached, the ratio of natural gas to air quantity is 1:3, and the calcination time in the volatile region is 80-160 minutes. By using the invention, product performance can be improved, high quality raw materials can be provided for producing high power and ultra high power graphite electrodes, and energy saving as well as low production cost can be achieved.

Description

technical field [0001] The invention relates to a tunnel kiln for calcining petroleum coke and a method for calcining petroleum coke with the tunnel kiln. Background technique [0002] The quality of petroleum coke used in the production of high-power and ultra-high-power graphite electrodes is very high, and the true density of petroleum coke is required to be above 2.09g / cm3, and the resistivity is less than 400μΩm. The requirements for the production of ordinary graphite electrodes, and the use of the existing tunnel kiln and its method of calcining petroleum coke, although the performance of the product has been improved and can meet the requirements for the production of high-power graphite electrodes, but the energy consumption is large and the output is low. The improvement in performance indicators is limited. Contents of the invention [0003] The purpose of the present invention is to provide a tunnel kiln for calcining petroleum coke and a method for calcining ...

AI Technical Summary

Problems solved by technology

[0002] The quality of petroleum coke used in the production of high-power and ultra-high-power graphite electrodes is very high, and the true density of petroleum coke is required to be above 2.09g / cm3, and the resistivity is less than 400μΩm. The requirements for the production of ordinary graphite electrodes, and the use of the existing tunnel kiln and its method of calcining petroleum coke, although the performance of the product has been improved and can meet the requirements for the production of high-power graphite electrodes, but the energy consumption is large and the output is low. Performance index improvement is limited

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