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VOC reductions of up to 74% and benzene reductions of up to
64% have been reported [1,2] at foundries using this process on
their green sand lines (see Pollutant Emission Reductions).
Upon operation of the first system in 1995, an ancillary
benefit to Sonoperoxone ® treatment was discovered –
improvement in sand system strengths.
In particular, the ratio of green compressive strength to
clay increases when using the system.
These sand system effects when employing a Clearwater
system allowed foundries to reduce their bond usage by up to 15%
[2].
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Currently,
six Sonoperoxone ® Clearwater Systems in five foundries are
operating in the United States and Canada.
The green sand lines at these foundries cast different
metals (brass, gray iron and ductile iron), use a variety of core
types (shell, phenolic-urethane, phenolic, furfuryl alcohol core
resin base), employ horizontal and vertical molding lines, and
range in size from 50 to 450 tons of castings per day. |
