# US 8,783,067 B2 · Use of pre-reacted cements as raw material for glass production and the manufacture of fiber therefrom

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- Number: US 8,783,067 B2
- Document ID: US8783067B2
- Status: Granted
- Kind: B2
- Application number: 11/451,811
- Filed: 2006-06-13
- Published: 2007-12-13
- Granted: 2014-07-22
- Earliest claimed: 2006-06-13
- Assignees: Johns Manville
- Applicants: Jon Frederick Bauer
- Inventors: Jon Frederick Bauer
- Web page: https://patentgrep.com/patent/US8783067B2

## CPC

- C03B 1/02: Compacting the glass batches, e.g. pelletising
- C03B 3/02: combined with preheating, premelting or pretreating the glass-making ingredients, pellets or cullet
- C03C 1/026: {Pelletisation or prereacting of powdered raw materials (apparatus or methods C03B1/02)}
- C03C 3/062: with less than 40% silica by weight
- C03C 3/087: containing calcium oxide, e.g. common sheet or container glass
- C03C 13/00: Fibre or filament compositions (manufacture of fibres or filaments C03B37/00)
- C03B: MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS

## Abstract

The subject invention is directed to a method for producing a pre-reacted clinker used in the manufacture of E glass. The clinker is fed into an E glass furnace, and melts down into a finished E glass product at high efficiencies and short production times. The clinker allows glass to be produced at a lower cost as compared with known methods.

## Claims

### Claim 1

A method for preparing a pre-reacted pellet for the formation of glass fibers comprising:
feeding raw materials into a pre-react kiln;
heating said raw materials at a temperature of from 900° C. to about 1250° C. for a period of from about 1 to about 24 hours so as to remove carbonates from said raw materials; and
forming said raw materials into a pellet.

### Claim 2 (depends on 1)

The method of claim 1 wherein said pre-react kiln comprises a rotary kiln.

### Claim 3 (depends on 1)

The method of claim 1 wherein said pre-react kiln comprises a fluidized bed kiln.

### Claim 4 (depends on 1)

The method of claim 1 wherein said raw materials comprise quartz, limestone and clay.

### Claim 5

A method for preparing a pre-reacted pellet for the production of glass comprising:
preparing a mixture of raw materials;
forming the mixture of raw materials into pellets; and
heating the pellets in a pre-react kiln at a temperature of from 900° C. to about 1250° C. for a period of from about 1 to about 24 hours to remove carbonates from the raw materials.

### Claim 6 (depends on 5)

The method of claim 5 wherein the pellets are formed in a pelletizer.

### Claim 7 (depends on 5)

The method of claim 5 wherein said raw materials comprise a silica containing material, an aluminum containing material and a calcium containing material.

### Claim 8 (depends on 7)

The method of claim 7 wherein said silica containing material comprises quartz.

### Claim 9 (depends on 7)

The method of claim 7 wherein said calcium containing material comprises calcium carbonate.

### Claim 10 (depends on 7)

The method of claim 7 wherein the aluminum containing material comprises clay.

### Claim 11 (depends on 5)

The method of claim 5 wherein said pre-react kiln comprises a rotary kiln.

### Claim 12 (depends on 5)

The method of claim 5 wherein said pre-react kiln comprises a fluidized bed kiln.

### Claim 13

A method for preparing glass comprising:
forming a raw material mixture;
heating the mixture at a temperature of from 900° C. to about 1250° C. for a period of from about 1 to about 24 hours such that carbonates are removed from at least a portion of said raw materials;
forming said raw material mixture into pellets;
melting said pellets to form a molten glass; and
forming said molten glass into a glass product.

### Claim 14 (depends on 13)

The method of claim 13 wherein said raw materials comprise:
a silica containing material;
a calcium containing material; and
an aluminum containing material.

### Claim 15 (depends on 13)

The method of claim 13 wherein said heating is performed in a rotary kiln.

### Claim 16 (depends on 13)

The method of claim 13 wherein said heating is performed in a fluidized bed kiln.

### Claim 17 (depends on 13)

The method of claim 13 wherein said glass product is a continuous glass filament.