Preparation of furnace at Varun Metal Foundry

Source : Metal Casting Ahmedabad To prepare the furnace for firing, sand is first piled around the tap-hole, on top of which layers of fuel are stacked and gradually heated. A special type of coal called coke, which has been processed by burning away non-carbon impurities, serves as the cupola furnace's main fuel source. As a result of processing, coke produces less smoke than unprocessed types of coal and achieves higher temperatures during combustion.  Once the layers of coke have reached a sufficient height, metal pieces are inserted through the top opening, along with a limestone flux that removes impurities from the metal during melting. Layers of coke fuel and metal are then alternated until the furnace is full enough to begin the melting process. Posted By : Metal Foundry Ahmedabad