The Research And Application Of Cryolite Electrolyte Replacement Powder On The Electrolytic Tank’s Preheating And Start-up Procedure

In aluminum production, due to excessive amounts of raw materials used in the oxidation of sodium, leading to electrolyte molecular ratio and temperature, to control the molecular ratio and temperature, aluminum fluoride need to be added to adjust the electrolyte composition。In this process, sodium oxide reacts with aluminum fluoride cryolite, will eventually lead to an increase in the amount of electrolyte in the tank, in order to maintain proper electrolyte levels, will remove more of the electrolyte, the electrolyte is a large number of long idle, unused state, not only takes up space, increase their fixed assets, and there is pollution in the environment。The purpose of this study is the use of aluminum started production characteristics of the initial firing, long-term solution to use the accumulation of waste electrolyte production problems。Analysis of the composition of the electrolyte, electrolyte powder containing84%cryolite, about6%potassium, about3%lithium, about4%calcium,1%magnesium,2%alumina。Cryolite based electrolyte composition with similar characteristics, whether the use of cryolite electrolyte replacement ground into a powder, is the main research。Industrial production in aluminum, cryolite basically do not normally use, the only widely used in aluminum reduction cells start firing, so our study focused mainly on the cell’s firing can start in the waste electrolyte replacement cryolite use。Cryolite electrolyte replacement powder on the success of the electrolytic tank used primarily to test the impact of the process is started, whether the conductivity of the electrolyte influence on the cathode side silicon carbide brick block and any impact on the groove whether it will affect the stability of the bath life is affected and so on。Based on the test results, the use of waste on the boot process cryolite electrolyte replacement, electrolyte conductivity, cathode blocks and side silicon carbide, stability and bath life are not affected。Start by roasting electrolyte replacement cryolite use, not only revitalize the company’s assets, saving a lot of money for the aluminum plant to create new business opportunities; also reduces the accumulation of stress field; but also conducive to resource conservation and environmental protection。At the same time using the start method of electrolyte powder, and a sister unit to the future, the company’s start roasting electrolyte powder to provide a valuable experience, with strong promotional value。...