Job Description:

• 1) Tends furnace, absorber, cooler, scrubber, and auxiliary equipment used in producing phosphoric acid by oxidation and hydration of elemental phosphorus: Patrols work area; observes water levels in scrubber, venturi-duct pan, and cooling-tower basin; and reads flowmeter and pressure gauges on phosphorus pump, fans, and blower to verify process conditions.

• 2) Records or calls readings to operator.

• 3) Observes flow of cooling water over top and outer walls of furnace to ensure uniform distribution, and notifies operator of malfunction.

• 4) Takes sample of cooling water for laboratory alkalinity test.

• 5) Turns valves to transfer acid to specified storage tanks and to start and stop water sprays in absorber, as directed, to control acid strength.

• 6) Removes and replaces screens and filters, using wrenches.

• 7) Opens valves to flush phosphorus pump and water-treating equipment with steam and regenerative chemicals.