US3607190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for preheating glass batch
Assignee: Individual
•
Filing: 1967-09-14
•
Granted: 1971-09-21
•
Expires: 1987-09-14
Abstract
Abstract A rotary inclined preheated kiln receives batch from a hopper and preheats the batch within a temperature range, preferably between about 1200* F. to 1500* F. by a gas burner located at the discharge end of the kiln. Effluent gas from the furnace may also be fed into the kiln for preheating purposes and the combustion and/or effluent gases may then be discharged into pipes disposed in the supply hopper in heat exchange relation with the batch therein. The gases exiting from the kiln are maintained above the dew point. Another form provides a second hopper supplying refining agents to the preheated batch prior to charging in the furnace. A third form adds sulfate and amber glass to the batch whereby the iron sulfide in the amber glass is sealed in a glass matrix and is preserved for reaction with the sulfate to release sulfur dioxide for the refining process.
Inventors
- 👤 Harvey Larry Penberthy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:48
CPC Classifications
C; C03; C03B; C03B3/00; C03B3/02; C03B3/023; Y; Y02; Y02P; Y02P40/00; Y02P40/50
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
20 words
Apparatus according to claim 1 wherein said advancing means includes means for rotating said tubular kiln about its longitudinal axis.
Claim 2
Dependent Claim
51 words
Apparatus according to claim 1 including means disposed in heat transfer relation to the batch in said hopper, together with means connected between said kiln inlet and said heat transfer means for conducting the gas from the kiln inlet to said first-mentioned means for preheating the glass batch in the hopper.
Claim 3
Dependent Claim
51 words
Apparatus according to claim 1 including means disposed in heat transfer relation to the batch in the hopper, together with means connected between said furnace and said heat transfer means for conducting the effluent gas from the furnace directly to said first-mentioned means for preheating the glass batch in the hopper.
Claim 4
Dependent Claim
150 words
A process for manufacturing glass in a glass furnace having a melting zone comprising the steps of treating glass batch containing refIning agents prior to charging thereof into the furnace by preheating substantially all of the glass batch, controlling the temperature of said preheating step to provide elevated batch temperatures not exceeding 1,500* F. and with a time period such that said batch is maintained in granular form and not over 50 percent of the volatiles are driven off, charging the preheated batch into the furnace and melting the preheated batch in the furnace, said batch containing sufficient sulfate such that not all such sulfate is reduced in the preheating stage, and including the step of adding glass containing a reducing agent in granulated form to the batch prior to preheating the latter whereby the reducing agent in the glass is preserved for reaction with the sulfate in the furnace.
Claim 5
Dependent Claim
16 words
The process according to claim 5 wherein the steps of preheating, charging and melting are continuous.
Claim 6
Dependent Claim
23 words
The process according to claim 5 wherein said step of preheating the batch is within a time period not greater than 30 minutes.
Claim 7
Dependent Claim
25 words
The process according to claim 5 wherein the preheating step heats said batch to temperatures within a range of about 1,200* F. to 1,500* F.
Claim 8
Dependent Claim
22 words
The process of claim 5 wherein the step of preheating the batch is accomplished by heating means separate from the furnace-heating means.
Claim 9
Dependent Claim
25 words
The process of claim 5 wherein the step of preheating includes passing the effluent gas from the furnace in heat transfer relation with the batch.
Claim 10
Dependent Claim
69 words
The process of claim 5 wherein the step of preheating the glass batch is accomplished by combustion heating means separate from the furnace-heating means and including the step of further controlling the temperature such that the exit gases from the preheated batch are maintained above the temperature at which water vapor from the combustion gases of said combustion heating means would condense on the batch in the preheating stage.
Claim 11
Dependent Claim
40 words
The process according to claim 5 wherein the step of preheating includes passing the effluent gas from the furnace in heat transfer relation with the batch and preheating the batch within a time period of not greater than 30 minutes.
Claim 12
Dependent Claim
29 words
The process according to claim 5 wherein the step of preheating includes passing combined effluent and combustion gases from within the furnace in heat transfer relation with the batch.
References Cited (Backward Citations)
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Cited
US1970112A
Cited
US2976161A
Cited
US3116055A
Cited
US3397972A
Cited
US3185554A
Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |