Method for top-charging solid waste into a molten metal bath

• US 5,491,279 A
• Filed: 04/02/1993
• Issued: 02/13/1996
• Est. Priority Date: 04/02/1993
• Status: Expired due to Fees

• Current Assignee: Quantum Catalytics LLC
• Original Assignee: Molten Metal Technology Incorporated
• Inventors: Howie, F. James III, Nagel, Christopher J., Griffin, Thomas P., Robert, Edgar J.
• Primary Examiner(s): MAI, NGOCLAN THI
• Application Number:
  US08/042,609
• Time in Patent Office: 1,047 Days
• Field of Search: 588/201, 588/205
• US Class Current: 588/314
• CPC Class Codes: A62D 2203/10 Apparatus specially adapted for treating harmful chemical agents; Details thereof
• CPC Class Codes: B01J 10/005 carried out at high temperatures in the presence of a molten material
• CPC Class Codes: B01J 2219/0009 Coils
• CPC Class Codes: B01J 2219/00123 adding a temperature modifying medium to the reactants
• CPC Class Codes: B01J 2219/00155 using insulating materials or refractories
• CPC Class Codes: B01J 4/002 Nozzle-type elements nozzle-type reactors B01J19/26
• CPC Class Codes: B01J 8/003 in a downward flow
• CPC Class Codes: C21C 2005/4666 for charging with organic contaminated scrap
• CPC Class Codes: C21C 5/466 Charging device for converters
• CPC Class Codes: F27D 3/0025 Charging or loading melting furnaces with material in the solid state
• CPC Class Codes: F27D 3/10 Charging directly from hoppers or shoots
• CPC Class Codes: F27M 2001/05 Waste materials, refuse

Abstract

A method and apparatus for top-charging a solid waste into a molten metal bath to form a dissociation product are disclosed. The method includes introducing the waste into the molten metal bath through a refractory tube disposed in a reactor, containing the molten metal bath, through which the refractory tube extends. A gas outlet is disposed above the molten metal bath. The refractory tube has a submergible end which is immersed in the molten metal bath and which defines a lower opening at the terminal end of the refractory tube and an elevated opening, whereby a portion of the molten metal bath enters the refractory tube through the lower opening to allow the molten metal bath to remain within the refractory tube while at least partially dissociating the waste to form the dissociation product in the molten metal bath. An oxidizing agent can be directed into the molten metal bath at a rate sufficient to form an gaseous oxygenated product which is discharged from the reactor.

Claims

1. A method for top-charging a solid waste into a molten metal bath contained in a reactor, wherein the solid waste is dissociated into dissociation products that are subsequently oxidized to form a gaseous oxygenated product, comprising introducing said waste into the reactor through a refractory tube that extends within the reactor and into the molten metal bath, said refractory tube having a submergible end that is immersed in the molten metal bath and that has a lower opening at a terminal portion of the submergible end and at least one elevated opening, whereby a portion of the molten metal bath enters the refractory tube through the lower opening for dissociating the waste and for forming the gaseous oxygenated product, the gaseous oxygenated product passing out of the refractory tube through said elevated opening and being discharged from the reactor through a reactor outlet disposed above the molten metal bath.

2. The method of claim 1 wherein an oxidizing agent is directed into the molten metal bath at a rate that is sufficient to react with the dissociation product and form the gaseous oxygenated product.

3. The method of claim 2 wherein the waste includes a hydrocarbon.

4. The method of claim 3 wherein the hydrocarbon includes coal.

5. The method of claim 1 wherein the waste is not comminuted.

6. The method of claim 2 wherein the oxidizing agent is directed into the molten metal bath at the refractory tube, whereby reaction with the dissociation product heats the waste in the refractory tube.

7. The method of claim 1 wherein an oxidizing agent and a hydrocarbon gas are directed into the upper end of said refractory tube, whereby the waste is preheated by burning the hydrocarbon gas with the oxidizing agent.

8. The method of claim 1 wherein the molten metal bath has a temperature of about 1,500°

C.

9. A method for top-charging a solid waste into a molten metal bath contained in a reactor, wherein the solid waste is dissociated into dissociation products that subsequently forms a gaseous product, comprising introducing said waste into the reactor through a refractory tube that extends within the reactor and into the molten metal bath, said refractory tube having a submergible end that is immersed in the molten metal bath and that has a lower opening at a terminal portion of the submergible end and at least one elevated opening, whereby a portion of the molten metal bath enters the refractory tube through the lower opening for dissociating the waste and for forming the gaseous product, the gaseous product passing out of the refractory tube through said elevated opening and being discharged from the reactor through a reactor outlet disposed above the molten metal bath.

10. A method for top-charging solid waste into a molten metal bath contained in a reactor, wherein the solid waste is dissociated into dissociation products that are subsequently oxidized to form a gaseous oxygenated product, comprising the steps of:

a) directing an oxidizing agent and a hydrocarbon gas into the upper end of a refractory tube that includes a submersible end that extends into the molten metal bath, whereby the waste is preheated by burning the hydrocarbon gas with the oxidizing agent; and

b) introducing said waste into the reactor through the refractory tube, whereby a portion of the molten metal bath enters the refractory tube through a lower opening at a terminal end of the refractory tube for dissociating the preheated waste and for forming the gaseous oxygenated product, the gaseous oxygenated product passing out of the refractory tube through an elevated opening at said submergible end of the refractory tube and being discharged from the reactor through a reactor outlet disposed above the molten metal bath.