Glass fiber scrap reclamation

• US 4,432,780 A
• Filed: 08/27/1982
• Issued: 02/21/1984
• Est. Priority Date: 08/27/1982
• Status: Expired due to Term

• Current Assignee: Owens- Corning Fiberglas Technology Incorporated (Owens Corning)
• Original Assignee: Owens-Corning Fiberglas Corporation
• Inventors: Streicher, William L., Hohman, Charles M., Propster, Mark A.
• Primary Examiner(s): LINDSAY JR, ROBERT
• Application Number:
  US06/412,337
• Time in Patent Office: 543 Days
• Field of Search: 65/2, 65/28, 65/134, 65/137, 65/335
• US Class Current: 65/473
• CPC Class Codes: C03B 3/00 Charging the melting furnaces
• CPC Class Codes: C03B 3/02 combined with preheating, premelting or pretreating the glass-making ingredients, pellets or cullet
• CPC Class Codes: C03B 5/16 Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
• CPC Class Codes: C03B 5/235 Heating the glass C03B5/02, C03B5/18, C03B5/225 take precedence

Abstract

A method of reclaiming chemically coated glass scrap is disclosed. The scrap is introduced into the oxidizing atmosphere of a hydrocarbon-fuel fired glass melting furnace. Some of the glass is melted with the unmelted portion being melted with the glass batch as it moves through the furnace.

Claims

1. A method of processing chemically-coated glass fibers which comprises introducing the fibers in discrete form in an oxidizing gaseous stream the stream being supplied in an amount sufficient to transport the coated glass fibers into hot oxidizing gases above the glass batch within a glass melting furnace to oxidize at least a portion of the chemical coating from the surface of the fibers, accumulating some portion of the glass fibers on said unmelted batch and moving said portion of the glass fibers and said unmelted batch through said furnace to melt the fibers and commingle the melted fibers and the melted batch as molten glass.

2. The method of claim 1 in which said glass fibers are introduced into said furnace through the upstream end wall of said furnace.

3. The method of claim 1 in which said glass fibers are introduced into said furnace through the longitudinal side walls of said furnace.

4. The method of claim 1 in which said glass fibers are introduced into said furnace through the downstream end wall of said furnace.

5. The method of claim 1 in which said glass fibers are introduced into said furnace as a mixture comprising air.

6. The method of claim 5 in which said mixture comprises from about 10 to about 35 cubic feet of air per pound of glass fibers.

7. The method of claim 1 in which said glass fibers are introduced at a velocity of about 15 to about 25 feet per second.

8. The method of claim 1 in which said glass fibers are introduced in an amount up to about 15 weight percent of the total glass pull from said furnace.

9. The method of claim 1 in which cullet is introduced into said furnace.

10. The method of claim 1 in which pulverized glass batch and cullet are introduced into said furnace.