Continuous Long Path Gaseous HF Monitoring in a Potroom Roof Vent

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Courtesy of Boreal Laser Inc.

ABSTRACT
Various continuous long path HF monitors were operated in a potline roof ridge ventilator at the Tomago Aluminium Smelter. The reliability, consistency and usefulness of the equipment was assessed during their period of operation in the roof ridge ventilator over 520 m. A cassette sampling method developed previously was used to assess the accuracy of the monitoring equipment over a range of concentrations of HF. An OPSIS continuous long path HF monitor was operated in a potline roof ventilator at the Aluminium Pechiney St Jean-de-Maurienne plant over 360 m. The equipment was compared with a cassette sampling method developed by Aluminium Pechiney’s Laboratoire de Recherche des Fabrications.

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