the furnace burners have found to be creating more than enough problems for the hobby metal casting professionals. It is not unusual to read about people who have attempted to design a furnace, only to be faced with problems and frustration with a complex burner. However its is quite simple to build a burner for home foundry if we proceed with proper knowledge and understanding of foundry burners.
Problems seem to apparent because due to some reason, people generally proceed to design complex burners from elaborate drawings without the necessary skills, and tooling facilities that the original designer have utilized during the design and construction process.
With the requisite workshop skills along with a sensible selection of tools and equipment, you will be able to design and construct the equipment essential for the successful melting of metal.
When it comes to fabricating equipment for your home foundry, there are no short cuts. To mend something together in a rough manner is only inviting problems in the future.
Given Below is a simple description - The burner comprises of a long plain black mild steel pipe. The end nozzle of the burner consists of an inverted cone. There is a mid section where a venturi is attached; the gas jet is positioned near the venturi.
The simple brass jet projects into the stream of forced air that passes through the burner tube. The gas jet orifice is reasonably big and works under low pressure; the air supplied by the blower to the burner tube is low pressure, but travels at a high volume.
The design of burner is simple, yet effective, however, there are some components integrated in the design, which require simple lathe turning skills. Although basic workshop knowledge is adequate to design this item.
A second hand household vacuum cleaner is attached to the blower (the type, which has a second outlet for the hose connection, which blows). The vacuum cleaner also has an variable electronic motor speed control that a regulated flow of low volume air during the start up phase of burner.
A liquefied petroleum gas (LPG) cylinder is used to supply the gas to burner. It is necessary that the supply of gas is regulated by an adjustable industrial diaphragm gas regulator gauze suitable for LP gas, as there is no other safe method of regulating the supply of fuel gas to the furnace burner. A ball valve can be attached in line as an emergency shut off valve.
For a hobby foundry, there is no special reason to design and construction a complex burners, which requires special size jet, and shrouds that must be functioned at a specific gas / air pressure. A basic and simple design furnace burner will work effectively for the melting of metals in a hobby foundry.
The professionals who build and design complex burners usually posses lathes, milling machines and several other expensive tools and equipment to build the burners. However if you opt to design it even a bit different to the original design specifications, there is a good probability that the burner will not work properly.Types
Depending on the type of fuel used, there can be three types of burners for foundry man -
- Waste oil burner
- Forced air burner
- Gas burner