In discussing the open storage dust problem and possible solutions, one obvious question arises – what are the economics of placing large bulk storage under cover? Several known, practical, workable solutions to the open storage dust problem are described. These include the following which will be dealt with in some detail:
A. Open pile surface crusting agents
B. Open pile surface moistening systems
C. Dust control at the transfer points – (dust suppression and collection)
As might be expected, this artificial surface crust traps the loose, small particles by means of a chemical bonding agent on the face of the pile. By spraying such a bonding agent over the pile surface, a thin solid crust is formed (about 3/8″), which will normally last from several months to a year depending on conditions. As an example of the crust durability. These crusting agents are normally applied by a conventional tank-truck sprayer system which is loaded with the liquid crusting agent, which travels around the perimeter of the piles, applying the crusting agent to the surface.
One of the organic polymer type systems offered is the Johnson-March SP-301 system. The vendor states that it can maintain a crust up to one year’s time. The generalized application recommendation is