The report gives results of fractional and overall mass efficiency tests of the Lone Star Steel steam-hydro scrubber. The tests were performed on one of seven modules of a full scale scrubber used for controlling particulate emissions from an open hearth furnace. Total flue gas particulate mass concentrations were determined at the inlet and outlet of the scrubber by conventional (Method 5) techniques. Inlet and outlet particulate concentrations as functions of size were determined on a mass basis using cascade impactors for sizes from about 0.3 to 5 micrometer, and on the number basis for sizes smaller than about 1 micrometer using optical and diffusional methods. The report includes brief descriptions of the open hearth process, the Lone Star Steel steam-hydro scrubber, economics of operating the scrubber, measurement methods for calculating fractional efficiency, a synthesized time history of the open hearth particulate emissions, and fractional efficiencies as measured for several scrubber operating conditions.

"EPA/650-2-74-028." "April 1974." Prepared by authors for M.W. Kellogg Company under contract to EPA; Contract no. 68-02-1308 (Task 11), ROAP No. 21ADL-04, Program element no. 1AB012. Includes bibliographical references.