Why Pusher Furnace is Used in High Temperature Area
Pusher furnace suppliers have defined pusher furnaces as a continuous furnace with the help of which the work pieces that are being heated are pulled across the hearth, or the present hearth beams under the efforts of an electric, or even a hydraulic pusher. This pusher is placed directly behind the charge.
Therefore, these types of furnaces are heavily used in the metallurgy industry. It is also a present in machine building and for heating the metal work pieces for overheated pressure shaping or, for providing heat treatment for metal works.
These furnaces are categorized with the help of their design feature only. They can be used to reach a wide temperature range of four hundred to a thousand Celsius degrees in a short time span for heating metal work pieces. These largest specimens of these furnaces can be used in the rolling mills.
In areas such as wheel rolling and forging, the work pieces that are being heated is pushed away and to the sides of the guides that are present in a U-shaped cross section. Alternatively, for smaller pieces of articles, the heat treatment involves placing a coil of stripes made of steel, stacks of plates, or wire reels on trays and covered in muffle before being pushed through the furnace.
Pushing is by far the simplest method of carrying a work piece through a furnace. This is mostly because it requires simple and basic equipment compared to other furnaces. However, there are several difficulties involved as well in these types of furnaces. Some of the common ones are:
- The controllability of the heating regime is vastly difficult due to a certain lack of flexibility.
- The work pieces can often be damaged owing to them being scraped against the hearth. This however can be eliminated to an extent of proper trays and liners are used.
- This process involves the removal of billet which can be a tedious operation by itself.
Pusher furnaces have a typical amount of eight rows available, with ceramic fiber or brick insulations. It can also be electric, or direct gas filled, which are often regenerative and recuperative. It also deals with radiant tube systems.
Alloy, steel and ceramic are preferred materials that are demanded when it comes to creating the hearth systems. These furnaces also some with special companion hearth generators, quench tanks, washers, press quencher and even load and unload tables.
Pusher furnaces such as these are used for the processing of steel, stainless steel, aluminum, titanium and even cast iron, with processing atmospheres involving elements such as nitrogen, air and flue products.
Pusher furnace suppliers suggest looking at the manufacturing requirements and output materials when it comes to selecting pusher furnaces, as maintenance costs can be quite high with these types of furnaces.