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Description
Vermiculite, high-temperature, heat-insulating boards for combined refractory lining and high-temperature heat insulation with a temperature of up to 1250 °C.
DESCRIPTION
Vermiculite boards are high-temperature heat-insulating, power-saving products intended for operation in conditions with a temperature of up to 1200 °C. They combine high strength with low thermal conductivity and high resistance to thermal shocks. Boards are fully machined and easyly installed. Special mortar is recommended for installation. Refer to Section «Refractory and masonry mortars».
Boards of several types are produced, namely:
– High-temperature, heat-insulating
– High-temperature with high strength
– Low-temperature, heat-insulating
– Fire-resistant, heat-insulating
High-temperature, heat-insulating boards
VB -1100 (375) with a density of 375 kg/m3;
VB -1100 (475) with a density of 475 kg/m3;
VB -1100 (600) with a density of 600 kg/m3;
VB -1100 (700) with a density of 700 kg/m3;
High-temperature boards with high strength
VB -900 with a density of 900 kg/m3;
VB -1200 (1200) with a density of 1200 kg/m3;
VB -1200 HTI with a density of 1200 kg/m3;
VB -1200 WIS with an increased strength and density of 1200 kg/m3;
Boards VB have specific strength, heat and other characteristics:
— High-temperature, heat-insulating
— High-temperature with high strength
— High-temperature, insulating
— Fire-resistant, heat-insulating “Low-temperature vermiculite boards“.
| These are high-temperature, ultra-lightweight, fire-resistant, heat-insulating vermiculite boards with application temperature from 950 to 1150 oC. Absolutely not combustible, with high porosity, low density, good heat insulation properties. Refer to Table 3. |
| VB -1100 |
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| Vermiculite boards VB-1100 are widely used in high-temperature firing and melting furnaces, thermal units and boilers. They are not destroyed by liquid aluminum and have high resistance to penetration of cryolite and fluorides. Due to the high electrical resistivity and good resistance to thermal shock,VB-1100 is also used for heat insulation in many types of internal heaters. Refer to Table 1. |
| VB -900 |
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| Vermiculite boards VB 900 are high-temperature heat-insulating, energy-saving products intended for operation in conditions at a temperature up to 1150 °C. They combine high strength with low thermal conductivity and high resistance to thermal shock. They are intended for lining of various thermal installations and units. Refer to Table 2. (Download technical specifications) |
| VB -1200 |
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| Boards VB-1200 are specially designed as cryolite-resistant vermiculite boards for intermediate heat insulation in the cathodes of cells, which is installed between carbon blocks and more vulnerable to cryolite-alumina melt by underlying materials. Boards VB-1200 prevent penetration of substances into the electrolyzer cathode, as in result of chemical reactions, a fusible mixture of sodium fluoride and aluminum fluoride is converted into a solid mixture of magnesium fluoride, sodium silicate and aluminum silicate (nepheline). Thus, heat-insulating boards VB-12 also fulfill the functions of dry barrier mixtures. |
| VB-1200 WIS, VB-1200 HTI |
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| VB-1200 WIS, VB-1200 HTI – Structural Insulation – products are specially designed for the metallurgical industry. Low thermal conductivity, special strength, high application temperature, long service life, high heat saving, increased heat resistance make it possible to use boards VB-1200 WIS and VB-1200 HTI for heat insulation of various thermal units in metallurgy, including steel ladle, Intermediate ladle and torpedo car. Refer to Table 2. |
Boards VB-900, VB-1100 and VB-1200 fully comply with the criteria of Resolution A.472 (XII) IMO and in accordance with it are classified as non-flammable and not emitting noxious gases.
Boards VB-1200 are high-density products, characterized by good heat-insulating properties and very high mechanical strength.
Application
Boards VB-1100 and VB-1200 are used both for lining and for high-temperature heat insulation of various thermal units. They will not decompose even at direct exposure to the flame. Due to boards VB-1100 and VB-1200 resistance to carbon monoxide CO and hydrocarbons, they can be used in furnaces with reducing atmosphere. They are virtually free of sulfur, and therefore are an ideal choice for furnaces in which nickel alloys or other sulfur-critical alloys are produced. Due to their higher density, boards VB-1200 possess higher wear resistance than boards VB-1100.