Solid material comminution or disintegration – Processes – With classifying or separating of material
Patent
1991-08-29
1992-10-27
Watts, Douglas D.
Solid material comminution or disintegration
Processes
With classifying or separating of material
177 1, 177122, 241 25, 241 75, 299 7, B07B 100
Patent
active
051582384
ABSTRACT:
This invention relates to process and apparatus for recovering and cleaning lead shot, bullets and slugs of various sizes from shooting range backstops and similar sites. The process involves excavating the site material and delivering same to a surge hopper from which the material is metered substantially uniformly to a vibratory feeder. The material is delivered by the feeder to a shredder which serves to condition and de-agglomerate the material for uniform flowability and separation. The shredded material is delivered to a trommel screen for initial separation into two major fractions, returning the larger particle fraction to the excavation site and delivering the smaller particle fraction to a sizing screen. The smaller particle fraction is sized into (a) all particles larger than the finest lead shot, bullets and slugs determined as existent at the site and (b) all particles smaller than the finest lead shot, bullets and slugs, both the oversized (a) and the undersized (b) particle fractions being returned to the excavation site. The sized lead-containing fraction is delivered to a water tank wherein a slurry is created by water circulation following which the slurry is delivered to a gravity spiral separator to separate the lead-containing material from the non-lead-containing material. Both the lead-containing material and the non-lead-containing material are passed through de-watering sieves to concentrate the solids therein, the first de-watered fraction containing the recovered clean lead particles for recycling and the second de-watered fraction containing waste soil for return to the excavation site.
REFERENCES:
patent: 3393876 (1968-07-01), Elmore
patent: 3647150 (1972-03-01), Stephanek
patent: 4044956 (1977-08-01), Benedetto et al.
patent: 4126673 (1978-11-01), Cromwell
patent: 4139454 (1979-02-01), Larson
patent: 4397424 (1983-08-01), Zappa et al.
patent: 4593766 (1986-06-01), Gossard
patent: 4726530 (1988-02-01), Miller et al.
patent: 4726880 (1988-02-01), Smith
Lehman Ellis
Watts Douglas D.
LandOfFree
Process and apparatus for recovery of lead shot, bullets and slu does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process and apparatus for recovery of lead shot, bullets and slu, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process and apparatus for recovery of lead shot, bullets and slu will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-901132