Glass and other material melting systems

• US 10,570,045 B2
• Filed: 05/02/2016
• Issued: 02/25/2020
• Est. Priority Date: 05/22/2015
• Status: Active Grant

• Current Assignee: John Hart Miller
• Original Assignee: John Hart Miller
• Inventors: Miller, John Hart
• Primary Examiner(s): Franklin, Jodi C
• Application Number:
  US14/999,391
• Publication Number:
  US 20160340219A1
• Time in Patent Office: 1,394 Days
• CPC Class Codes: C03B 2211/40 using oxy-fuel burners
• CPC Class Codes: C03B 2211/70 Skull melting, i.e. melting or refining in cooled wall crucibles or within solidified glass crust, e.g. in continuous walled vessels
• CPC Class Codes: C03B 5/03 Tank furnaces
• CPC Class Codes: C03B 5/04 in tank furnaces C03B5/02 takes precedence
• CPC Class Codes: C03B 5/1675 Platinum group metals
• CPC Class Codes: C03B 5/193 using gas, e.g. bubblers
• CPC Class Codes: C03B 5/26 Outlets , e.g. drains, siphons; Overflows , e.g. for supplying the float tank, tweels
• CPC Class Codes: C03B 5/42 Details of construction of furnace walls, e.g. to prevent corrosion; Use of materials for furnace walls
• CPC Class Codes: C03B 5/43 Use of materials for furnace walls, e.g. fire-bricks
• CPC Class Codes: C03B 5/44 Cooling arrangements for furnace walls
• CPC Class Codes: H05B 3/03 Electrodes
• CPC Class Codes: Y02P 40/50 Glass production, e.g. reusing waste heat during processing or shaping
• CPC Class Codes: Y02P 40/57 Improving the yield, e-g- reduction of reject rates

Abstract

The invention includes systems and methods for melting materials to make glass and other materials subject to electric melting that improve the capacity of the melters and/or the melt quality and/or the melting costs and/or the life of tank melters. These systems and methods use one or more of boosting with one or more streams of super hot melt coming from one or more boosting melters, cooling one or more components of one or more of the melters normally cooled using water with a high temperature cooling fluid or fluid suspension and protecting the normally high wear areas of refractory linings by covering those high wear areas with one or more strips of a corrosion and oxidation resistant metal or alloy useful above 2400 degrees F.

Claims

1. A system for producing molten glass from batch material the system comprising:

a conventional tank type melter for producing molten glass from glass batch;

the tank type melter having a capacity of at least 75 tons/day prior to boosting with one or more electric melters as described below, and the tank melter further comprising;

a) a front end; and

a rear end opposite the front end wherein molten glass flows from the front end to the rear end; and

a bottom capable of holding a melt pool of molten glass; and

a crown opposite the bottom; and

at least one side wall connecting the top, bottom, front end and rear end;

a batch entry point at the front end and capable of receiving batch materials from a batch source,

a plurality of heating electrodes and/or a plurality of burners placed in the side walls,

one or more openings through the crown of the tank type melter configured to allow one or more molten glass streams to pass through and into the melt pool,

a) at least one electric melter, each comprising;

an outlet located in a bottom or side portion of said electric melter

electric heating means, and said electric melter capable of emitting a melt stream of molten material having a temperature of at least 2500 degrees F. through said outlet,

b) one or more mounts configured to support the at least one electric melter above a surface of the melt pool in the tank melter, relative to gravity, such that the outlet of the one or more electric melters;

a. said mount comprising;

a platform configured to hold the electric melter and deliver molten glass stream from the electric melter to the melt pool of the tank melter;

at least one support configured to hold said platform; and

at least one brace connecting said platform to said at least one support.

2. The system of claim 1 wherein at least one of the one electric melters is or are mounted to be moved back and forth on said structure to move the falling melt stream(s) back and forth as said stream or streams enter said pool.

3. The system of claim 1 wherein the said at least one electric melter is or are mounted above the top of the tank melter.

4. The system of claim 2 wherein the said at least one electric melter is or are mounted above the top of the tank melter.

5. The system of claim 2 wherein the temperature of the melt stream exiting at least one of the one or more said at least one electric melter is at least 2600 degrees F.

6. The system of claim 3 wherein the temperature of the super hot melt stream exiting at least one of the one or more said at least one electric melter is at least 2600 degrees F.

7. The system of claim 1 further comprising an insulated melt stream protection device surrounding at least a portion of the falling melt stream below the said electric melter and above the top of the tank type melter to reduce heat losses from the melt stream.

8. The system of claim 2 further comprising an insulated melt stream protection device surrounding at least a portion of the falling melt stream below the said electric melter and above the top of the tank type melter to reduce heat losses from the melt stream.

9. The system of claim 2 further comprising one or more refractory shields configured to cover a portion of the opening(s) in the top of the tank type melter to reduce heat losses from the tank type melter.

10. The system of claim 1 further comprising one or more refractory diverters that each intercept a stream of the melt and oscillates the stream of the melt in a desired pattern prior to said stream falling onto the said pool in the tank type melter.