APPARATUS FOR PRE-HEATING A METAL CHARGE FOR A MELTING PLANT AND CONNECTED METHOD

摘要

Apparatus for pre-heating and conveying a metal charge to a container of a melting plant, comprising at least a conveyor channel along which said metal charge is able to advance so as to be delivered to the container, and in which above said conveyor channel at least a hood is disposed which defines a tunnel inside which at least part of the fumes exiting from said container are able to advance. At least a zone of the hood comprises an expansion chamber located above at least a portion of said metal charge, and able to expand and keep said fumes inside it for a minimum desired time of at least 1.5 seconds before they go into contact with the metal charge.

主权项

1. Apparatus for pre-heating and conveying a metal charge to a melting furnace of a melting plant, comprising:
a conveyor channel capable of advancing a metal charge to the melting furnace, having lateral walls and a bottom wall that define a substantially U-shaped cross section, a hood at least partially disposed above the conveyor channel and having a tunnel wherein at least part of the fumes generated from the melting furnace advance into the hood, an expansion chamber within the hood and at least partially located above the metal charge, a connection pipe disposed between the melting furnace and the expansion chamber; at least one suction pipe disposed within the lateral walls of the conveyor channel; and a longitudinal portion of the conveyor channel having at least one passage apertures disposed within the lateral walls and in fluid communication with one the at least one suction pipe; wherein an internal volume of the expansion chamber is a function of the flow rate of fumes generated from the melting furnace so that the fumes are able to remain in the expansion chamber for a time period of at least 1.5 seconds before contacting to the metal charge on the conveyor channel.