Method of removal of impure gases at the time of scrap preheating, and equipment for use of same
First Claim
1. A method of preheating scrap metal with impure gases containing particulates and discharging from a metallurgical furnace, the method comprising the steps of:
- burning said impure gases in a combustion chamber,conducting a first portion of the combustion products from said combustion chamber to a container of scrap metal,contacting the scrap metal with said combustion products for preheating the scrap whereby additional impurities are generated and entrained in said combustion products,washing in a wet scrubber the combustion products and entrained additional impurities,mixing the first portion of the combustion products and entrained additional impurities after wet scrubbing with a second portion of the combustion products from said chamber,and removing particulates from the mixture of the second portion of combustion products and the first portion of combustion products and the entrained additional impurities after the wet scrubbing thereof.
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Accused Products
Abstract
A method and apparatus for preheating scrap metal within pure gases discharged from a metallurgical vessel. The method comprises the steps of burning the gases in a combustion chamber to remove impurities therefrom, conducting a first portion of the combustion products to a container of scrap metal, contacting the scrap metal with the combustion products for preheating the scrap metal whereby additional impurities are generated, washing in a wet scrubber the mixture of combustion products and additional impurities, mixing the scrubbed combustion products and additional impurities with a second portion of the combustion products from the combustion chamber, and removing particulates from the mixture.
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Citations
5 Claims
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1. A method of preheating scrap metal with impure gases containing particulates and discharging from a metallurgical furnace, the method comprising the steps of:
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burning said impure gases in a combustion chamber, conducting a first portion of the combustion products from said combustion chamber to a container of scrap metal, contacting the scrap metal with said combustion products for preheating the scrap whereby additional impurities are generated and entrained in said combustion products, washing in a wet scrubber the combustion products and entrained additional impurities, mixing the first portion of the combustion products and entrained additional impurities after wet scrubbing with a second portion of the combustion products from said chamber, and removing particulates from the mixture of the second portion of combustion products and the first portion of combustion products and the entrained additional impurities after the wet scrubbing thereof. - View Dependent Claims (2, 3)
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4. An apparatus for preheating scrap metal with impure gases containing particulates and discharging from a metallurgical furnace,
a combustion chamber, means for conducting impure gases from the furnace to said combustion chamber, a container for scrap metal having an inlet and an outlet, means for conducting a first portion of the combustion products from said combustion chamber to the inlet of said container, a wet scrubber having an outlet and an inlet connected to the outlet of the container, means for bypassing a second portion of the combustion products from said combustion chamber around said container and said wet scrubber and for mixing the same with the scrubbed gases exiting the outlet of the wet scrubber.
Specification