Thermal blast techniques

This technique originally developed to determine the efficacy of shot peening applied to induce compressive stresses at the surface of metallic work pieces has been adapted to thermally sprayed thin coatings (Knight and Smith, 1993). A thin test strip is being mounted on a holder (SAE Handbook, 1977) and blasted with shot. This treatment leads to curving after removal from the fixture. The peened... 

The thermal efficiency of the cold blast cupola furnace can be improved by the installation of a secondary row of tuyeres. These provide extra oxygen above the combustion zone, which induces the oxidation of the CO in the combustion gases, the CO being formed by the endothermic reduction of CO2 by C (coke). This technique liberates the latent heat of the combustion gases, thus improving the thermal efficiency of the cupola. 

The major difficulty presented to anyone involved in CPQRA is in selecting the proper outcomes based on the available information and determining the consequences. The consequences of concern in CPQRA studies for explosions in general arc blast overpressure effects and projectile effects for fires and fireballs the consequences of concern arc thermal radiation effects. Each of these types of explosions and fires can be modeled to produce blast, projectile and/or thermal radiation effects appropriate for use in CPQRA studies and these techniques are described in the designated sections. 

Another important use of silica bricks is in the making of the roof and upper checkerwork of Cowper stoves. These stoves send preheated air blasts to blast furnaces. They work as heat exchangers. Hence, the checkerwork material should have high thermal conductivity and heat capacity. In order to increase the productivity of blast furnaces, one of the techniques used is to increase the blast temperature. These stoves are now made to operate at temperatures of 1500°C. This high temperature exists at the upper checkerwork... 

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