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Disclaimer
| Abrasion of Refractories: | Wearing away of the surfaces of refractory bodies in service by the scouring action of moving solids. | |
| Acid-Proof Brick: | Brick having low porosity and permeability, and high resistance to chemical attack of penetration by most commercial acids and some other corrosive chemicals. | |
| Alumina: | The oxide of aluminum; melting point 3720°F (2050°C); in combination with water, alumina forms the minerals diaspore, bauxite and gibbsite. In combination with silica and water, alumina forms kaolinite and other clay minerals. | |
| Castable Refractory: | A mixture of a heat-resistant aggregate and a heat-resistant hydraulic cement. For use, it is mixed with water and rammed, cast or gunned into place. | |
| Gunning: | The application of monolithic refractories by means of air-placement guns. | |
| Insulating Refractories: | Lightweight, porous refractories with much lower thermal conductivity and heat-storage capacity than other refractories. Used mostly as backing for brick or higher refractoriness and higher thermal conductivity. These materials provide fuel economy through lower heat losses, increased production due to shorter heat-up time, economy of space (size and weight) because of thinner walls and improved working conditions. Insulating refractories are available as brick or monoliths. | |
| Plastic Refractory: | a blend of ground refractory materials in plastic form, suitable for ramming into place to form monolithic linings. | |
| Refractories: | Nonmetal materials suitable for use at high temperatures in furnace construction. While their primary function is resistance to high temperature, they are usually called on to resist other destructive influences such as abrasion, pressure, chemical attack and rapid changes in temperature. | |
| Silica: |
The oxide of silicon. Quartz and chalcedony are common silica materials; quartzite, sandstone and sand are composed largely of free silica in the form of quartz.
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