Patent ID: 8857622
Filing Date: 2014-10-14
Classification: B07B,B08B

Abstract:
1. A method of cleaning contaminated particulate material with a dedusting apparatus, comprising the steps of: feeding a supply of contaminated particulate material into a frusto-conical feed hopper terminating at a lower feed hopper discharge opening; distributing said contaminated particulate material over an inverted conical wash deck formed with apertures spaced uniformly over the an upper surface of said conical wash deck, said apertures passing through said conical wash deck and being oriented to allow a passage of air in a common direction relative to said upper surface of said conical wash deck; pushing air through said apertures to pass a flow of air through said apertures and into said contaminated particulate material flowing over said conical wash deck to remove contaminates from said contaminated particulate material to create cleaned particulate material; directing all of said cleaned particulate material downwardly off said conical wash deck and to a product discharge opening; and discharging contaminate-laden air from said conical wash deck through an air discharge collector mounted on an upper portion of said dedusting apparatus.