Solid, burning

Combustible Dusts Dusts are particularly hazardous they have a very high surface area-to-volume ratio. When finely divided as powders or (dusts, solids burn quite differently from the original material in the bulk. Dust and fiber deposits can spread fire across a room or along a ledge or roof beam very quickly. On the other hand, accumulations of dust can smolder slowly for long periods, giving little indication that combustion has started until the fire suddenly flares up, possibly when no one suspects a problem. 

In addition to the energy requirements of solid propellants, Eq. (3) shows that consideration must be given to the mass-flow rate of the combustion products through the nozzle. Because all solids burn on the exposed surface, the mass flow of propellant combustion products is given by the equation... 

Solid bodies, flows past, 11 753-757 Solid-bound photosensitizing dyes, 9 518 Solid bowl centrifuges, 16 659-660 Solid-burned quicklime, 15 29 Solid by-products... 

COMBUSTION OF LIOUIDS AND SOLIDS Burning of wood and coal... 

N3)2Cu(C2H5.NH2)2]. mw 237.75, N 47.13% blue solid, burns 8t crepitates in a flame, explodes when placed on a hot plate but not on slow heating does not detonate by impact stable in water low elec conductivity can be prepd by dissolving Cu(N3)2 in the amine soln and addg acid, MeOH or ether to ppt the product or by addg NaN3 to an amine soln of the Cu1 salt (Ref 2)... 

Vapor and dust severely irritate the mucous membranes and respiratory system. Vapor severely irritates and the solid burns the eyes. The vapor and solid burn the skin. Swallowing would cause internal irritation and damage. Prolonged exposure to low concentrations of vapor may cause damage to lungs. Avoid breathing vapor and dust. Prevent contact with eyes and skin.2 TLV-TWA 0.1 ppm (0.85 mg/m3).12... 

Properties White to light tan solid burned, slightly phenolic odor. Bp 238C, mp (two crystalline forms) 38-39C and 3C, d (liquid) 1.1274 (25/25C), (solid) 1.258 (25/25C), refr index 1.5608 (20C), flash p 244F (117C). Insoluble in water soluble in alcohol. Combustible. 

ALLTEX (8001-35-2) The solid burns with difficulty but is usually dissolved in xylene (solution flash point 84°F/29°C cc). Reacts with strong oxidizers, with a risk of fire or explosions. Decomposes on heating above 311°F/155°C on contact with strong bases, strong sunlight, and catalysts such as iron, forming hydrogen chloride. Attacks metals in the presence of moisture. 

Thus the properties of quicklime from a given kiln reflect the average properties of individual lumps, each of which has experienced a particular time-temperature history. Fig. 15.8 compares the distribution of particle densities for a light-burned quicklime from an annular shaft kiln, with a mean apparent density of 1.66 g/cm with that of a solid-burned quicklime from a coal-fired traditional shaft kiln with a mean apparent density of 2.15 g/cm. Table 15.4 presents some typical... 

Much of the lime from shaft kilns was still hand-picked to remove partially calcined lumps (which were tipped), and to sort light-burned from solid-burned lime. 

Solid-burned quicklime see hard-burned quicklime. 

A fire is maintained only, if its heat generation is equal or larger than its heat losses. The heat stems from the combustion of the material involved. If that is solid or liquid it has to be evaporated in the first place, which implies a heat loss. If liquids or solids burn there usually is a positive feedback. The heat produced by combustion leads to evaporation of the material and thus to a further spread of the fire. 

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