Aluminum Electrolytic Molecules Than The Determination Of The New Method

Molecular ratio is an important parameter that should be controlled on time in the process of aluminum production. Because electrolyte's liquid temperature depends on its molecular ratio and molecular ratio influences currency efficiency directly in the course of production. So, simple, rapid and accurate determination methods on the subject are always being researched in order to guide aluminum electrolysis production.At present, fluoride ion selective electrode method, x-ray fluorescence method and heat triton method are used to determine aluminum electrolyte's molecular ratio.Firstly, fluoride ion selective electrode method was used to determine aluminum electrolyte's molecular ratio in the paper and its results were compared with traditional method's (heat triton method's). The two analyses' results were greatly similar. The comparison showed that the results of fluoride ion selective electrode method are more repeatable. However, it's time-consuming.Secondly, a direct molecular ratio determination way was proposed and studied for the purpose of shortening determination time. The samples needn't to be pre-treated when their molecular ratios are determined by using the new method. If the molecular ratio is 2.20-2.50,it can be determined accurately and its error is around 0.03.Finally, the relations between molecular ratio and liquid temperature were studied and a mathematic model was established. By using this model, an on-line detection instrument was made and it can determine molecular ratio accurately and rapidly. The error is around 0.03.The direct molecular ratio determination method and the on-line detection instrument can make determination easier and quicker. It is useful to adjust electrolyte's molecular ratio. The uses of the new method and the in-situ analytical apparatus will improve aluminum electrolysis plants' economic efficiency.