Application technology for electrolyte powder and block at the start of roast

An electrolyte powder and roasting start-up technology, which is applied in the field of metallurgical electrolysis, can solve the problems of high roasting start-up cost, scorched artificial legs, electrolyte leakage, etc., and achieves the effects of reducing the roasting start-up cost, improving the melting capacity, and eliminating the phenomenon of hardening.

Inactive Publication Date: 2008-02-27
SHANDONG NANSHAN ALUMINUM
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  • Claims
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AI Technical Summary

Problems solved by technology

In this method, due to bias current and other factors during the roasting process, the local temperature on the side is too high, which easily burns the artificial legs, causing electrolyte leakage, and the cost of roasting start-up is high.

Method used

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Effect test

Embodiment Construction

[0007] An application technology of electrolyte powder and blocks in the roasting start-up. Firstly, the electrolyte powder and soda ash are blended according to the molecular ratio of the electrolyte powder, and mixed fully to make electrolyte blocks. Or use the electrolyte block to build the weir wall at the artificial leg extension, and then fill it with the electrolyte powder. During the start-up process, if the total amount of electrolyte is insufficient, electrolyte powder and blocks can be added from the empty space at the edge. Electrolyte (powder) blocks are added when the furnace is installed to protect the artificial legs on the side. After 96-120 hours of calcination, the middle of the tank will melt and the temperature of the side will reach 650°C or more to start. After start-up, according to the total electrolyte demand, electrolyte powder and blocks are added on the side to further increase the application quantity of electrolyte powder in the firing start-up. ...

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Abstract

The present invention belongs to the field of metallurgical electrolytic technology. In the concrete, it relates to an application technique of electrolyte powder and block in calcinations starting process. It is characterized by that the electrolyte powder and calcined soda are blended according to the molecular ratio of electrolyte powder, fully mixed and made into electrolyte blocks. When the furnace is charged, all the edge portions of said furnace can be filled up with electrolyte blocks, so that all the edge portions of said furnace can be protected by electrolyte (power) blocks and the temperature can be slowly raised, its calcinations operation can be implemented in starting process, therefore calcinations starting cost can be reduced and the calcinations starting effect can be raised.

Description

Technical field: [0001] The invention relates to the technical field of metallurgical electrolysis, in particular to an application technology of electrolyte powder and block in roasting start-up. Background technique: [0002] In the prior art, electrolyte blocks are used to build walls at the artificial legs in the firing furnace, and cryolite is filled inside. Cryolite accounts for about 70-80% in use, and the market price of electrolyte powder and blocks is far lower than Cryolite, electrolyte powder, block loss is minimal. In this method, due to factors such as bias current during the roasting process, the local temperature at the side is too high, which easily burns the artificial leg and causes electrolyte leakage, and the roasting start-up cost is high. Invention content: [0003] The object of the present invention is to provide an application technology of electrolyte powder and block in firing start-up which can reduce the cost of firing start-up and improve th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/00
Inventor 刘海石宋昌明宋振会王建军魏承启杨永乾
Owner SHANDONG NANSHAN ALUMINUM
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