Novel aluminum cell furnace building process

Abstract

The invention provides a novel process for furnace building of an aluminum electrolyte bath. The process method is as follows: all rubbishes in the furnace building area are cleared away, and cathode steel bars are pasted by normal mounting window steel plates and tightly pressed so as to make dry type antiseepage materials unable to flow out; and steel plates are used as baffle plates for both ends of carbon clearances between cathode carbon blocks; the dry type antiseepage materials are arranged in the bath around the cathode carbon blocks, and are vibrated and flattened by a vibrator. The process method has the advantages of effectively solving the problem that the dry type antiseepage materials flow out due to the unsealing of the cathode window, simplifying the process of building the furnace, shortening the construction time and reducing the labor input, strengthening the heat retaining capacity of the bath bottom, lowering the heat loss and the stressing damage of the bath bottom and reducing the environmental pollution of solid wastes generated due to the major repair of the bath; moreover, the dry type antiseepage materials can be cyclically utilized, and the heat retaining performance and the reasonable heat balance of the electrolyte bath are better than that of the originally designed electrolyte bath, and the dry type antiseepage materials can react with seepage electrolytes in the electrolyte bath to generate a compact viterous body-formed nepheline layer, which can prevent the electrolytes from continuous seepage and prolong the service life of the electrolyte bath.

Description

1. Technical field [0001] The invention relates to a new furnace building process for an electrolytic cell used for smelting nonferrous metal aluminum. 2. Background technology [0002] The electrolytic cells used for the production of electrolytic aluminum, after being put into use for two or three years, there will be phenomena such as lifting of the side of the furnace, heaving of the bottom of the furnace, shifting of the isotherm of the electrolytic cell, and large fluctuations in technical conditions, which not only have a certain impact on the life of the electrolytic cell More importantly, the molten aluminum in the electrolytic cell leaks from the bottom of the furnace, and electrochemically reacts with the cathode steel rod to melt it, which can cause the molten aluminum to flow out of the electrolytic cell, causing the entire series of power outages, and even worse It will cause a short circuit between adjacent electrolyzers, cause an explosion, and cause heavy ca...

AI Technical Summary

Problems solved by technology

Generally, after the overhaul of the manufacturer, the electrolytic cell is energized, and the roasting time meter is poured for 8 days. The remaining water in the castable around the tank evaporates during the roasting process. The block is discharged, leaving capillary pores, forming channels for liquid aluminum to penetrate, and burying hidden dangers; ②, the rigidity of the high-strength castable is too strong after solidification, causing the side block to be thermally expanded and deformed, and then lifted seriously, causing side damage; ③, cathode carbon The surrounding area of ​​the block is fixed by castables that are too rigid, and the cathode steel rod is also fixed. When the lining material expands, the bottom of the furnace will bulge, and the aluminum liquid in the electrolytic cell will leak from the surroundings and electrochemically react with the cathode steel rod, making it melts and flows from the sides of the electrolytic cell

[0003] In addition, the inner lining is poured with high-strength castables, the furnace construction process is cumbersome, the construction time is long, and the manpower input is large; the thermal conductivity is relatively large, and the heat loss at the bottom of the tank is relatively large; a large amount of solid waste will be generated every time the electrolytic cell is overhauled. pollute the environment