US3661554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for hardening agglomerated bodies of ore concentrate in a high frequency alternating field
Assignee: ELEKTRODIUS AB
•
Filing: 1969-04-07
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Granted: 1972-05-09
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Expires: 1989-04-07
Abstract
Abstract When agglomerating ore concentrates the green agglomerated bodies lack strength and hardness to be handled and charged into the reducing furnaces. The process according to the present invention resides in the hardening of the green agglomerated bodies by exposing them to a high frequency alternating field and in a further hardening treatment by exposing the bodies so treated to a hydrothermal treatment at a high temperature and at a corresponding high pressure.
Inventors
- 👤 Endel Wijard
- 👤 Jan Odsvall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:26
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/14
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
40 words
A process as claimed in claim 1, and thereafter exposing said hardened bodies, while still heated from exposure to said field, to a hydrothermal treatment at a temperature of about 190* C. and elevated pressure to harden said bodies additionally.
Claim 2
Dependent Claim
17 words
A process as claimed in Claim 1, in which said ore concentrate is an iron ore concentrate.
Claim 3
Dependent Claim
32 words
A process as claimed in claim 3, in which said concentrate includes an ore concentrate selected from the group consisting of nickel, molybdenum, vanadium, titanium, tungsten, niobium, tantalum, and a mixture thereof.
Claim 4
Dependent Claim
24 words
A process as claimed in claim 1, said ore concentrate being selected from the group consisting of zinc and copper and a mixture thereof.
Claim 5
Dependent Claim
77 words
In a process for manufacturing hard bodies from an agglomerated mass of an ore concentrate also comprising a humidifying agent, a slag former, and as the sole bonding agent a finely divided slag obtained from a metallurgical melting process; the improvement comprising agglomerating said mass, then exposing said agglomerated mass to a high frequency alternating field thereby to heat and harden said mass, and discontinuing said exposure before the temperature of the agglomerated mass exceeds 100* C.
Claim 6
Dependent Claim
15 words
A process as claimed in claim 6, said bonding agent being a blast furnace slag.
Claim 7
Dependent Claim
40 words
A process as claimed in claim 6, and thereafter exposing said hardened bodies, while still heated from exposure to said field, to a hydrothermal treatment at a temperature of about 190* C. and elevated pressure to harden said bodies additionally.
References Cited (Backward Citations)
US933270A
Cited
US833005A
Cited
GB517798A
Cited
GB672137A
Cited
US3261959A
Cited
US3413112A
Cited
US3490895A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |