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US 5,174,509 AGranted
Incinerated waste material treatment
AssigneeResource Recycling, Inc.
InventorsGeorge O. Starke, James R. Diefenthal, Peter F. Prinz
Life of this patent
Estimating the term…
Abstract
Apparatus and processes for treating an incinerated waste material feedstock to obtain a "free-from-ash" ferrous metal product are disclosed which provide for early separation of the initial feedstock into a predominately ash stream and predominately ferrous metal stream by a two step separation based on size of the material and use of dual trommels or special bar screens and dual magnet arrangements.
Claims16
A method for treating a feedstock of incinerated waste material containing ferrous metals, non-ferrous metals and ash to produce a "free-from-ash" ferrous metal stream comprising:
- (a) separating said feedstock to form:
- (i) a first stream whose components each have dimensions which are less than a first pre-determined size, and
- (ii) a second stream whose components each have dimensions which are greater than said first pre-determined size,
- (b) conveying said first stream to a sizing means to form:
- (i) a third stream whose components each have dimensions which are greater than a second pre-determined size, said second pre-determined size being less than said first pre-determined size, and
- (ii) a fourth stream whose components each have dimensions which are less than said second pre-determined size,
- (c) conveying said third stream to said second stream,
- (d) removing ferrous metal from said fourth stream to form:
- (i) a first ferrous metal stream, and
- (ii) a fifth stream,
- (e) conveying said first ferrous metal stream to said second stream,
- (f) reducing said dimensions of said components in said second stream, said third stream and said first ferrous metal stream to form a sixth stream whose components each have dimensions less than a third pre-determined size, said third pre-determined size being less than said first pre-determined size,
- (g) removing ferrous metal from said sixth stream to form a seventh stream comprising substantially non-ferrous metal and ash,
- (h) conveying said seventh stream to said fifth stream,
- (i) separating ash from the ferrous metal removed from said sixth stream to form "free-from-ash" ferrous metal,
- (j) separating the combined fifth and seventh streams to form:
- (i) an eighth stream whose components each have dimensions which are less than a fourth pre-determined size and are comprised substantially of ash, said fourth pre-determined size being less than said second pre-determined size, and
- (ii) a ninths stream whose components each have dimensions which are greater than said third pre-determined size and less than said first pre-determined size,
- (k) reducing said dimensions of said components in said ninth stream to form a tenth stream whose components each have dimensions which are less than a fifth pre-determined size, said fifth pre-determined size being less than said first pre-determined size, but greater than said third pre-determined size,
- (l) removing any ferrous metal from said tenth stream to form an eleventh stream comprising non-ferrous metals and ash, and
- (m) separating ash from said eleventh stream to form a twelfth stream comprising substantially non-ferrous metals.
18 more elements
A method for treating a feedstock of incinerated waste material containing ferrous metals, non-ferrous metals and ash to produce a "free-from-ash" ferrous metal stream comprising:
- (a) separating said feedstock to form:
- (i) a first stream whose components each have dimensions which are less than a first pre-determined size, and
- (ii) a second stream whose components each have dimensions which are greater than said first pre-determined size,
- (b) conveying said first stream to a sizing means to form:
- (i) a third stream whose components each have dimensions which are greater than a second pre-determined size, said second pre-determined size being less than said first pre-determined size, and
- (ii) a fourth stream whose components each have dimensions which are less than said second pre-determined size,
- (c) conveying said third stream to said second stream,
- (d) removing ferrous metal from said fourth stream to form:
- (i) a first ferrous metal stream, and (ii) a fifth stream,
- (e) conveying said first ferrous metal stream to said second stream,
- (f) reducing said dimensions of said components in said second stream, said third stream and said first ferrous metal stream to form a sixth stream whose components each have dimensions less than a third pre-determined size, said third pre-determined size being less than said first pre-determined size, (g) removing ferrous metal from said sixth stream to form a seventh stream comprising substantially non-ferrous metal and ash,
- (h) conveying said seventh stream to said fifth stream, and
- (i) separating ash from the ferrous metal removed from said sixth stream to form "free-from-ash" ferrous metal.
10 more elements
Dependencies are inferred from the claim text.