Tend agitator tanks that mix chemicals with lime sludges.
What does a Lime Sludge Mixer do?
Tends agitator tanks that mix chemicals with lime sludge to produce filler used in finishing paper: Adjusts valves to control flow of sludge through filter screen into agitator tank. Adds acid and alum, and starts agitator to stir mixture. Tests alkalinity of mixture by titration test, and adds acid or alum as necessary. Weighs specified samples of sludge and compares them with standard chart to determine density. Screens sludge sample through wire mesh to detect presence of foreign matter. Records test results and quantities of sludge processed.