US4148627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Agglomeration of steel mill wastes
Assignee: HICKMAN WILLIAMS AND COMPANY COLUMBIA PLAZA SUITE 1110 PO BOX 538 CINCINNATI OH 45201 A CORP OF
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Filing: 1977-05-23
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Granted: 1979-04-10
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Expires: 1997-05-23
Abstract
Abstract A method for agglomerating particulate steel mill wastes such as roll scale and coke fines, and for utilizing the agglomerate in a metallurgical furnace. The wastes are mixed with Portland cement and cast into slabs which are thereafter broken and screened to a size which can be charged into a metallurgical furnace by automatic handling and weighing systems.
Inventors
- 👤 George D. Haley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:28
CPC Classifications
B; B02; B02C; B02C18/00; B02C18/28; B02C4/00; B02C4/02; B02C4/08; C; C22; C22B; C22B1/00; C22B1/14; C22B1/24; C22B1/242; C22B1/243
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
81 words
A method for agglomerating steel mill ferrous wastes comprising mixing said wastes with water and Portland cement, pouring the mixture into a mold to form, after hardening of the cement, a slab having a thickness no greater than the maximum dimension of the desired agglomerated fragments, and thereafter breaking said slab into fragments of desired size by passing it through a flake breaker which fractures said slab into fragments having a maximum dimension not greater than the thickness of said slab.
Claim 2
Independent Claim
81 words
A method for agglomerating steel mill ferrous wastes comprising mixing said wastes with water and Portland cement, pouring the mixture into a mold to form, after hardening of the cement, a slab having a thickness no greater than the maximum dimension of the desired agglomerated fragments, and thereafter breaking said slab into fragments of desired size by passing it through a flake breaker which fractures said slab into fragments having a maximum dimension not greater than the thickness of said slab.
Claim 3
Dependent Claim
32 words
The method of claim 1 wherein said steel mill ferrous wastes are selected from the group consisting of, mill scale, precipitator dust, slag fines, filter cake, iron ore, ferroalloy ores and fines.
Claim 4
Dependent Claim
28 words
The method of claim 1 wherein the size of the agglomerated fragments is in the range of fragments having a maximum dimension of 1/4 inch to 11/2 inches.
Claim 5
Dependent Claim
20 words
The method of claim 1 wherein said mixture comprises, by weight, 80%-92% waste material, 5%-15% Portland cement, and 2%-5% water.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-09 | 1982-10-09 | 1983-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-09 | 1986-10-09 | 1987-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-09 | 1990-10-09 | 1991-04-10 | $7700.00 | Window Closed / Lapsed |