The description of some important heat treatment furnaces is given below: 1. Oil and Gas Fired Furnaces: Oil-fired or gas-fired furnaces may be designed as direct fired, semi-muffle, or muffle. a. The 'direct-fired furnaces' allow the steel to come into direct contact with the hot gases of combustion and are mainly used for heating steel for forging operations. b. The [...]
The following points highlight the seven main types of batch furnaces used for heat treatment of steel. The types are: 1. Box-Type Batch Furnace of Steels 2. Bogie-Hearth Furnace of Steels 3. Muffle Furnace of Steels 4. Pit Furnace (Vertical Furnace) of Steels 5. Bell Furnaces of Steels 6. Salt Bath Furnaces of Steels 7. Fluidized-Bed Furnaces of Steels. Type [...]
The following points highlight the two main types of continuous furnaces used for heat treatment of steel. The types are: 1. Rotary-Hearth Furnace 2. Straight-Chamber Continuous Furnaces. Type # 1. Rotary-Hearth Furnace: In a rotary-hearth furnace, as illustrated in Fig. 10.14, the hearth of the heating chamber rotates around a vertical axis inside a stationary roof and inner as well [...]
There are three types of arc furnaces namely: 1. Direct Arc Furnace 2. Indirect Arc Furnace 3. Submerged Arc Furnace. Design of Direct Arc Furnace: Figure 3.16 shows a direct arc furnace. The chamber of the furnace is lined with refractory material. The arc is struck between the electrode and the charge. Three electrodes made of carbon or graphite are [...]