Ring type roasting furnace temperature elevation method

Abstract

The invention relates to a method for heating a ring-type roasting furnace, in particular to a method for heating the ring-type roasting furnace in the process of producing a pre-roasted anode by aluminum electrolysis. The method is characterized by comprising the following heating processes in turn that: a first stage, during which an initial temperature is 143 DEG C; the temperature rises for 32 hours with a temperature rise speed of 7.5 DEG C per hour; a second stage, during which the temperature rises to 695 DEG C with a temperature rise speed of 10 DEG C per hour; a third stage, during which with a temperature of 695 DEG C as an initial temperature, the temperature rises to 855 DEG C at 96 hours with a temperature rise speed of 5 DEG C per hour; a fourth stage, during which with a temperature of 855 DEG C as an initial temperature, the temperature rises to 1143 DEG C of 128 hours with the temperature rise speed of 9 DEG C per hour and rises to 1150 DEG C at 129 hours with the same temperature rise speed; a fifth stage and a sixth stage are heat preservation stages, which are to keep the temperature of 1150 DEG C at 192 hours; after heat preservation is carried out for 63 hours, the temperature rise is finished. The method effectively reduces energy consumption, improves the appearance quality and physical and chemical index performances of the anode and reduces unsafe factors which cause a flue on fire, etc.

Description

A kind of heating method of ring type roasting furnace technical field A method for raising the temperature of a ring-type roaster relates to a method for raising the temperature of a ring-type roaster in the production process of aluminum electrolytic prebaked anodes. Background technique In the baking process of aluminum electrolytic prebaked anode production, as the last process of carbon anode production, the quality of its production directly affects the completion of the physical and chemical indicators and appearance quality of the anode. The heating process is the most important control process in the roasting process, and its heating speed directly affects the roasting quality and safe and stable industrial production. The heating rate is in turn determined by the curve used for firing. It can be seen that the roasting curve plays a leading role in the roasting process. Due to the influence of the temperature of the anode and the volatile matter emitted during ...

AI Technical Summary

Problems solved by technology

Due to the influence of the temperature of the anode and the volatile matter emitted during the roasting process, the binder coal tar pitch undergoes complex decomposition and polymerization reactions, and the volatile matter emitted from the anode cannot be fully utilized, resulting in high energy consumption and affecting the appearance quality of the anode And physical and chemical index performance, causing unsafe factors such as flue fire

Images