Refractory

The refractory mass or refractory body are elements that resist heat and are especially used in the walls of the furnace or in general any system that requires protection from heat, is usually found in the isolation of fireplaces, fires, hot water tanks for crucibles for molten metals, etc.. through asbestos. They are normally used in association with the refractories or refractory plates and have a common composition with them. To produce, prepare a mixture of ligno-sulfonates aluminum silicate, (aluminum + silicon) and silicon carbide, a look that has been homogenized mixture is added and barium sulfate and calcium fluoride and then proceed to cooking of the mixture to 110 degrees Celsius, such mixtures significantly reduce water use and allow formed by molding or extrusion, in the past was the use of asbestos usual for this type of application but due to toxicity (carcinogenic) have fallen into disuse usually are found with a density of between 450-750 kg M3, with a very small thermal contraction of around 0.5%, non-combustible and are obviously looking for with no water in its structure, for which they should be kept dry. The power must be capable of cutting, drilling, grinding, shaping, polishing, and usually just need to work the conventional tools of carpentry. The installation and the pairing of refractory masses must be performed by qualified personnel, since not all the mortars are useful for this purpose under that contain moisture, the same, as is evident is harmful and should be avoided at all special things at the time of the operation of the oven because it creates internal pressures, which could degenerate into cracks in the refractory bricks An application of the refractory mass is the development of so-called prefabricated refractory and can be manufactured according to the geometry specified by the customer, this fact is very important because, the refractory coating should cover the entire surface of heat exposure and Understandably, there are places that has a special geometry that implies both geometric designs with similar characteristics, usually are found as usual plates of dimensions of 1250 x 2480 mm with a thickness of between 10-60 mm or 24 Bricks x 11.5 x 7.1 cm, with smooth surfaces, and are very resistant to temperature and abrasion, its price tends to be more than 10 times that of conventional is important to note that the process must be handled carefully to avoid vitrification Silicon content as this weakens the prefabricated, however in some cases some vitrification seeks also to ensure a degree of tightness. In the daily work is very important to take care not to hit these elements scratch because they are very fragile so the loading and unloading the kilns should be done with utmost care.