Trolley Type Heating Furnace for Metal Ingot and Billet those furnaces are designed for heating large size metal products. capacity of those furnaces range from 10T---500T. Nanjing Changjiang Furnace Science and Technology Co., Ltd supplies kinds of industrial furnaces to international market. We will offer you a perfect furnace for you accordance with your request. Those furnaces are designed for heating large size metal products. capacity of those furnaces range from 10T---500T. 1. trolley type 2. electricity 3. gas fired 4. for annealing 5. for heating 6. for reheating 7. other heat treatment