Most refractory products are made in the form of simple products such as a rectangular, several kilograms parallelepiped. This is a versatile form for running liners of various configurations. Currently, in the refractory industry, there is a reduction in the production of refractory materials in the form of simple articles and a corresponding increase in the production of concrete and refractories.
Refractory materials are characterized by high strength at high temperatures, chemical inertness. Refractory materials in the composition are ceramic mixtures of refractory oxides, silicates, carbides, nitrides, borides. The refractory material used is carbon (coke, graphite). Basically it is non-metallic materials with fire resistance of not less than 1580 ℃, are used virtually everywhere where necessary to keep all processes at high temperatures.
Refractory materials are piece products (blocks) and unshaped. The latter include navarochnye materials, mortar, filling and other special printed and molding compounds, used among others for the production of refractory concrete and shotcrete.
Refractories are subdivided according to the following characteristics:
•shapes and sizes
•chemical and mineral composition
•field of use
CLASSIFICATION ACCORDING TO SHAPE AND SIZE
•straight and wedge of normal size, small and large formats;
•Shaped simple, complex, especially complex, large block, weighing more than 60 kg
•special: industrial and laboratory applications (crucibles, tubes, etc.)
CLASSIFICATION BY MOLDING PROCESS
•sawn from natural stones or prefabricated blocks;
•cast, produced by the method of pouring from a liquid slurry, foam grinder, etc.
•molded plastic parts, produced from masses in a plastic state by machine molding, with subsequent pre-pressing;
•Semi-dry molding of powders;
•molten casting of a melt obtained by electrofusion;
CLASSIFICATION BY IGNITABILITY
•fireproof (fire resistance from 1580 to 1770 C)
•high fire (from 1770 to 2000 C)
•higher fire resistance (from 2000 C to 3000 C)
•super-resistant (more than 3000 C)
Refractory materials and methods of use
Asbestos – a common refractory material that can withstand prolonged heating to 450-500 ℃. At the same time, it almost loses its power. Asbestos is a material that conducts heat only weakly.
https://refractoriesmaterials.com/basic-refractory/ is made in different shapes, also in the form of leaves. Widely used wherever furnaces are used, for thermal insulation of fire-prone objects for the unit fireproof walls and overlapping etc.
In the furnace production is very widely used steel . It is used in different ways (angle, channel, wire, etc.). Without steel also not. So, from it elements of ovens are made, sheets of a metal pile in front of doors of a furnace, apply it and for wind chambers. In the latter case, the steel should be clean, absolutely not damaged by rust.
Protective grid for stoves
Shields are structures that serve to insulate the side walls of the ovens. They allow to reduce the heat radiation. Protective grid made of brick and steel. The easiest way to build a protective screen for the furnace with your own hands can be from pig iron and steel from industrial production. Such screens are the most common. Install the panels at a distance of 1-5 cm from the walls of the furnace.
For the coating you use a number of thermal insulation materials:
•Basalt cardboard – thin layers of basalt fibers. This https://refractoriesmaterials.com/refractory-bricks-for-sale/ not only provides good heat, but also soundproofing;
•asbestos plate – a material with high thermal insulation properties. It is also characterized by its fire resistance, durability and strength;
•minerit – refractory material from which sheet metal is produced, for mounting protective screens for stoves and fireplaces, also in steam baths.
General scheme of using skin looks like this: wall – distance (2-3 cm) – thermal insulation (1-2 cm) – sheet metal. This allows you to reduce the distance between the wall of the oven and the wall of the room to 38 cm.
The scope in the described scheme is provided by ceramic sleeves that do not heat up. If the room does not even reach the prescribed minimum distance between the stove and the wall, the cladding is made with two layers of thermal insulation. Between them, with the help of ceramic bushes, a gap of 2-3 cm is left, to which the stainless steel plate is attached.
Sheath with food
To give the steam room a more aesthetic appearance (bare iron on the wall does not look very attractive), the walls can be roofed over. However, if you place it directly on the tree, there is no thermal insulation. Therefore, such a plating scheme is used: wall distance (2-3 cm) – refractory layer – tile. In this case, it is permissible that between the wall of the stove and the wall of the room not less than 15-20 cm.
For the refractory layer, the following materials are used:
•Fireproof Plasterboard – This is a drywall in which fiberglass is added. https://refractoriesmaterials.com/ceramic-fiber-board-for-sale/ is not afraid of thermal radiation and does not deform under its effect;
•minerit – effective refractory material. Mineral refractory boards are characterized by high moisture resistance, they are not destroyed and do not disintegrate;
•glass-magnesium plate – a material made of fiberglass. As a binder, a magnesian substance is used. It has a good sound and heat insulation, resistance to moisture and temperature fluctuations.
Do not neglect the gap in the scheme described, because it plays an important role. Its presence makes it possible to reduce the heating of the wooden wall to a minimum. The use of the same lining makes the appearance of the steam bath more attractive and allows to resist the design in the chosen style. Read more on this page: https://refractoriesmaterials.com/