Lindberg/MPH recently shipped a gas-fired aluminum stack melting furnace to a leader in the marine industry. The furnace was modified to hook directly to the company’s existing melting furnace to provide additional melting capacity and efficiency. Lindberg/MPH designed a system that attached via a short and enclosed launder connection trough. The two manually operated doors on adjacent sides allow for easy access to the melting chamber for cleaning. The laser charge-stack level-control monitors material level in the stack for maximum efficiency. Lindberg/MPH will also perform on-site start-up and training.
The stack melt zone of the furnace consists of a sloped charging stack that helps to minimize impact damage from ingot or large heavy scrap. Instead of falling directly onto the impact zone, it slides and tumbles to the bottom of the charging stack. The metal begins to melt at the intersection of the stack and hearth. Additional material that is charged in the stack is preheated until the metal below it becomes molten and runs off the hearth through the flanged connector into the separate melting and holding furnace.