A professional who controls equipment, such as vats, thionizer tower, absorbing tower, and autoclave, arranged in series to recover sulfur from coke-oven gas. Respnsibilities include:

• Turns valve to admit coke-oven gas into absorbing tower.
• Starts pumps that force solution containing arsenic compound and soda ash through tower.
• Pumps resulting foul solution into thionizer tower, and admits compressed air to precipitate sulfur and form froth which overflows into tank.
• Filters slurry, and washes salts from caked sulfur.
• Melts sulfur in autoclave, and casts it into pans.
• Determines alkalinity of absorbing solution by titration tests, and directs helper to add soda ash or arsenic compound.
• Observes meters and gauges to control temperature of solution.
• Punches dirt from holes in absorbing tower sprays with bar, and lubricates equipment.