Date of Award


Degree Name

Master of Science


Chemical and Paper Engineering

First Advisor

Dr. Richard B. Valley

Second Advisor

Mr. William K. Forester

Third Advisor

Dr. John F. Bobalek

Fourth Advisor

Dr. James E. Kline

Access Setting

Masters Thesis-Open Access


The Omnicon 3600 image analyzer was used in the study of the evaluation of screening efficiency determination methods. It is very difficult to get a good over all contaminant mass balance across a pressure screen because of the factors involved such as sampling around a screen, time spent in collecting the samples, and possible size reduction of the contaminants by the pump and screen. The image analyzer gives the contaminant analysis in terms of the total number of particles, total area of all the particles, the mean particle area and a histogram of the contaminant size distribution. The histogram data can be used to calculate the screening quotient value "Q" for particular size contaminants. A 6-cut lab flat screen was used to generate a regression equation between the contaminant weight and corresponding areas. The regression analysis shows a correlation of 94.0% to 98.0%.