Patent US3658307A successfully refreshed from Google Patents.
US3658307A
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Process and apparatus for melting slag
Assignee: Susquehanna Corp
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Filing: 1970-08-04
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Granted: 1972-04-25
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Expires: 1990-08-04
Abstract
Abstract A process and an apparatus for melting rock, slag, glass or other similar material or combination thereof for use in the production of high quality mineral wool fibers is disclosed. The apparatus includes a cupola to which is charged a base support of high temperature lump refractory material to serve as a permeable support for the slag charge. Gas-fired burners located along the side walls of the cupola below the upper level of the bed of lump refractory material produce hot combustion gases which move through the refractory bed and upward through the slag, melting it in the lower regions and preheating it in the upper part of the cupola. A water-cooled notch can be located at the bottom of the cupola to allow a pool of molten slag to accumulate, so that particles of unmelted slag which reach the bottom of the cupola will melt prior to being discharged from the cupola. The lump refractory material is selected for its high temperature and high load-bearing properties.
Inventors
- 👤 Charles Delton Richardson
- 👤 Robert John Corsentino Jr
- 👤 Oliver Maxwell Gould
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:14
CPC Classifications
C; C03; C03B; C03B5/00; C03B5/12; F; F27; F27B; F27B1/00; F27B1/08; Y; Y02; Y02P; Y02P40/00; Y02P40/50; Y10; Y10S; Y10S266/00; Y10S266/901
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
38 words
The process of claim 1 in which the gas heating means comprises at least one row of gas burners arranged around the lower extremity of the cupola and opening directly into the lump refractory material within the cupola.
Claim 2
Dependent Claim
29 words
The process of claim 2 in which the lump refractory material is charged to a level about 6 to 8 inches above the level of the gas heating means.
Claim 3
Dependent Claim
26 words
The process of claim 3 in which the lump refractory material comprises an aluminum oxide support having a lump size of about 1 to 4 inches.
Claim 4
Dependent Claim
26 words
The process of claim 3 in which the lump refractory material is heated to a temperature in the range of about 2,500* to 3, 000* F.
Claim 5
Dependent Claim
18 words
The process of claim 1 including means for accumulating the melted slag in the bottom of the cupola.
Claim 6
Dependent Claim
102 words
Apparatus for melting slag which comprises: a. a refractory chamber, b. a high load-bearing, lump refractory material filling said refractory chamber, said refractory material having a melting point above that of the slag to be melted, c. gas means for providing heat to the refractory chamber, said gas means being located below the upper level of the refractory chamber and positioned to inject its combustion gases directly into the refractory material mass, d. a chamber located above the refractory chamber, communicating with the refractory chamber and adapted to be filled with slag, and e. an opening for the discharge of melted slag.
Claim 7
Dependent Claim
37 words
The apparatus of claim 7 in which the gas means comprises at least one row of gas burners arranged Around the lower extremity of the refractory chamber and opening directly into the interior of the refractory chamber.
Claim 8
Dependent Claim
19 words
The apparatus of claim 8 including means for accumulating the melted slag in the bottom of the refractory chamber.
Claim 9
Dependent Claim
156 words
A process for melting slag in a cupola where said cupola is provided with a plurality of gas burners at the lower portion thereof, comprising: a. charging said cupola with a lump refractory material to form a permeable bed of refractory material, the upper level of said bed lying above that of said gas burners, said refractory material having a melting point above that of the slag to be melted, b. heating said bed by injecting the hot combustion gases from said burners directly into the refractory bed mass to provide a temperature level in said bed sufficient to melt slag, c. charging slag to said cupola whereby said slag rests on said bed of refractory material, d. passing heat from said bed to said slag to initiate flowing of said slag into said bed, e. heating said slag while in said bed into a molten state, and f. withdrawing the melted slag from said bed.
Claim 10
Dependent Claim
29 words
A process as claimed in claim 10 wherein the step of heating said bed elevates the temperature of said bed to the range of about 2,500* to 3,000* F.
Claim 11
Dependent Claim
32 words
A process as claimed in claim 11 wherein the step of charging said cupola with lump refractory material results in an upper bed level at least 6 inches above said gas burners.
Claim 12
Dependent Claim
125 words
A cupola for the melting of slag comprising: a. a refractory chamber, b. a permeable bed of lump refractory material filling said refractory chamber, said refractory material having a melting point above that of the slag to be melted, c. a second chamber for retaining the slag to be melted, said second chamber being positioned upstream of said refractory chamber and in communication therewith, d. means for providing gas-fuel-fired heat directly into said refractory chamber, said means being spaced about and opening into said refractory bed to inject its combustion gases directly into the refractory material mass, whereby said means will heat said bed to a level sufficient to melt slag, and e. an opening in said refractory chamber for the discharge of melted slag.
Claim 13
Dependent Claim
25 words
A cupola as claimed in 13 wherein said providing means includes a plurality of gas burners spaced about and opening directly into said refractory bed.
Claim 14
Dependent Claim
33 words
A cupola as claimed in claim 14 further comprising: a. a charge of slag in said second chamber, b. said bed of lump refractory material serving as a support bed for said slag.
References Cited (Backward Citations)
US2161180A
Cited
US2521830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |