SPECIALIST EQUIPMENT
Manufacturing: Refraline has a new production line
the metal that is building up until the furnace is ready to tap for metal again. Tis requires that the tap-hole clay be easily pressed into the tap-hole opening by using a mud-gun. Te heat in the furnace lining has to set-off the bonding system to ensure sufficient strength in the THC to hold the metal trapped behind like water behind a dam wall. Te vast temperature profile in
the refractory lining requires a dual- binding system to fulfil this task, ensuring hardening of the THC at lower temperatures as well as at higher temperatures. Te low-temperature binding system has to set the THC at around 300°C and has to be in place until the sintering of the material takes place at temperatures above 900°C. With these non-negotiable properties
of the THC, Refraline developed an innovative, non-toxic, low temperature binding system that replaces the use of tar and resin, which was used for decades in the smelting industry. After years of development a high-tech binder system was found that could fulfil all the requirements. Te newly developed non- toxic THC not only delivers on all aspects of health and safety (all toxins currently
THC ready to ship
body’s first line of defence to fight infections. Due to these problems some THCs
recently used resin instead of tar to act as binder, claiming to be a safer, more environmentally friendly option. Most of the resin used, however, contains formaldehyde as an ingredient. When formaldehyde is present at levels exceeding 0.1ppm some individuals may experience effects such as watery eyes, burning sensations in the eye, nose and throat, coughing, wheezing, nausea and skin irritations. Some people are very sensitive to formaldehyde while others show no reaction at exposure levels. Long-term effects to formaldehyde
exposure is less known but a study in 1980 showed that exposure to formaldehyde could cause nasal cancer in rats. More recently, in 2011 the National Toxicology Programme in the USA named formaldehyde as a known human carcinogen.
THE QUESTION So what if you could create a THC with no tar or resin, making it a truly
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environmentally friendly THC without sacrificing the operational performance?
THE ANSWER Tis is exactly what Refraline has done, with its commitment to the environment and health and safety of the workers who work day in and out around the furnaces of its customers. THCs are required to close the tap- hole in a safe way after the taping of the furnace is complete and then retain
Taphole block thermal FEA study
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