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Behaviour of the molten metal with the protection fabrics in foundries.

By 24 December, 2015October 10th, 2019Fire resistant fabrics, Foundry
protection fabrics foundry

Not all metals in the melting state behave in the same way when they accidentally come into contact with the different protective fabrics.

It is very important when choosing the best protective fabrics for splashes of molten metal, take into account the nature of it since they can choose whether it is of ferric or non-ferric origin as well as its different alloys, their behaviors directly affected Accidentally impact these safety equipment for smelters.

There are a variety of ferrous and non-ferrous metals which are also added other alloys that form other metals or mineral compounds of different nature. This wide variety of alloys, requires us to find the best protection fabrics to avoid the injuries of molten metal splashes as there are different behaviors according to these compounds.

When we speak of ferrous metals, we obviously refer to the iron-containing composition and these always exhibit similar behavior in all those processes of fusion. We could say that we can more easily find these fabrics to protect against this type of metal.

Iron and their alloys derived as steel, stainless steel, etc, acquires a melting temperature ranging from 1.200ºC to almost 1.700ºC and when these metal splash impact with the garment and protective fabrics causes an increase of temperature in them. The effects we seek is the total metal repellency and does not cause holes.

Molten Ferrous alloys when they impact on non protective fabrics, they cause immediate destruction due to contact in a high temperature. Rarely there are cases where the metal substance adheres to the protective fabric.

The iron has a highly destructive when contacted with the flame retardant fabrics that have light weights and fibers that do not support high peak temperature, causing a break of the fabric itself.

When we speak of color alloys such as copper, zinc, lead, tin, aluminum, nickel, or magnesium, with the exception of copper, these metals tend to stick easily in non protective fabrics. The working temperatures are somewhat lower and the cooling capacity is very high.

All these facts, causes that molten metal splash sticks in the fabric and allow immediate heat transfer to the operator himself as well as the fabric destruction.

In these types of fabrics protection splash of origin Non-Ferrous metals, it is essential to choose fibres capable of repelling the most of the adhesion of these metals in the fabric. Whatever their nature if the nonferrous metal (mainly Aluminium, Cryolite) remains stuck to the tissue, the consequences are severe but not so much with the lead, tin or zinc metals.

protection fabrics foundry

It is well known that the the main non ferrous alloy, is the Aluminium the most used in the foundries, and we take it as one of the most critical for its “staying stuck” easy behaviour in the clothes of the smelters. Molten aluminium (secondary production process) has an operating temperature of 700/800ºC, are enough to cause severe burns too.

Both production processes: primary or secondary smelting, the Aluminium is the metal alloy that more danger presents when smelters and foundrymen meet their liquid splashing.

Alloys such as tin, zinc or lead, which are almost always remain adhered to the fabric and in these cases, seek the maximum repellency while it is true that the temperatures of these metals are lower than the Aluminium primary production.

Ferrous metals have a high destructive power on the protective clothing, while nonferrous tend to stick causing a dangerous damage.

The Protective fabrics for Ferrous metals such as iron or steel, must withstand high thermal shock splashes of these metals, to avoid being destroyed by this effect and maintain its structure so as to prevent metal from entering into the ‘wearer’ clothing.

The use of internal fireproof clothing, always working together to minimize the damage if the outer layers of tissue, may come to fail.

Woven fabrics for protection nonferrous metals mainly aluminum, must allow full and absolute repellency to these; and when sticks to the fabric is when the damage they cause are very high. These types of protective fabrics are the most technical one in this sector and it is very important to select the appropriate one.


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