Applications guide to mass flow measurement in the primary metals

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Courtesy of Sierra Instruments, Inc.

Mass flow meters can provide precision measurement and control of proccss gases in many phases of plant operation. They make processes more repeatable and provide greater control over quality and costs. Sierra mass flow meters were designed for these purposes. They can make any plant more cost-effective in several ways:

Aluminum Purification: Automated Gas Flow Control

The last step before casting ingots is a final purification of the aluminum by bubbling through it a mixture of argon and chlorine gas. This process eliminates sodium and calcium salts, which arc skimmed off in the filter box.

Generally, this is not an automated process. Manually adjusted rotame- ters are used to control the flow of argon and chlorine, and changes in pressure and temperature can affect the process. Sierra's Series 840.

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