Aluminum electrolysis prebake anode roasting 24 hours period production technique

Abstract

The invention relates to a 24 hour period manufacturing technology for baking an aluminum electrolysis prebaking anode. The baking heating-up technology adopts the heating-up technology of 24 hour baking flame moving period; the baking period is 144 hours; the T1 temperature in a first preheating furnace is set to be the initial temperature which is set to be 260 DEG C; the temperature in two hours is set to be 284 DEG C; the temperature in five hours is set to be 321 DEG C; the temperature in twelve hours is set to be 408 DEG C; the temperature in eighteen hours is set to be 484 DEG C; the temperature in twenty-four hours is set to be 560 DEG C; the furnace chamber temperature difference of various time slices is controlled to be 30 DEG C to 30 DEG C below zero; settings of the temperature T4, T5 and T6 in three heating furnace chambers are as follows: the initial temperature is set to be 880 DEG C; the temperature in five hours is set to be 908 DEG C; the temperature in twenty-four hours is set to be 1050 DEG C; the temperature in thirty-six hours is set to be 1145 DEG C; the temperature from thirty-eight hours to seventy-two hours is kept to be 1160 DEG C; the furnace chamber temperature difference from five hours to twenty-four hours is controlled to be 20 DEG C to 20 DEG C below zero; and the temperature different from twenty-four hours to thirty-six hours, from thirty-sixhours to thirty-eight hours, and from thirty-eight hours to seventy-two hours is controlled to be 10 DEG C to 20 DEG C below zero.

Description

Technical field: [0001] The invention belongs to the technical field of non-ferrous metal aluminum electrolysis, in particular to a roasting and heating process for pre-baking anode carbon blocks in an aluminum electrolytic cell. Background technique: [0002] The production process of aluminum electrolytic pre-baked anode is: (see figure 1 ) Green block transportation, green block loading furnace, anode roasting (system), carbon block out of furnace, roasting anode block cooling on the carbon block storage rack, roasting anode block disassembly and cleaning (disassembly unit), roasting anode block storage. Among them, pre-baked anode baking is the most critical process in the production of aluminum electrolytic pre-baked anodes. The pre-baked anode baking system has an annual design capacity of 80,000 tons, two flame systems, and an open ring baking furnace with thirty-six furnace chambers. The same type of furnace chamber in the domestic carbon industry generally adopts the ano...

AI Technical Summary

Problems solved by technology

If the movement period is further shortened to 24 hours, the difficulty will increase exponentially compared to 26 hours

In addition, there is no research data on how to determine the 24-hour flame moving cycle roasting temperature rise curve in the prior art data

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