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    Interfacial reaction between highmanganese cast steel and silica sand or chromite sand. ... Whereas this effect appears to a small degree only when moulding sand matrices are of chromite.

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  • SAND, SAND ADDITIVES and SAND PROPERTİES

    • Chromite (FeCr2O4), a black, angular sand, is highly refractory and chemically unreactive, and it has good thermal stability and excellent chilling properties. However, it has twice the thermal expansion of zircon sand, and it often contains hydrous impurities that cause pinholing and gas defects in castings.

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    Silicon Dioxide is a natural compound of silicon and oxygen found mostly in sand, Silica has three main crystalline varieties: quartz, tridymite, and cristobalite. Fine particulate silica dust from quartz rock causes over a longterm progressive lung injury, silicosis.

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    the percentage range of on chromite sand in silica sand. Thermal regeneration of used sand with components separation of ... In order to obtain the objective it is necessary to separate the chromite sand from the silica purity for both kinds of sand must be > 99 percent.

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    Effect of Silica Fume on Workability and Compressive. Silica fume is known to improve the mechanical characteristics of concrete. The principle physical effect of silica fume in concrete is that of filler, which because of its fineness can fit into space between cement grains in the same way that sand fills the space between particles of coarse aggregates and cement grains fill the space ...

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    Ladle Filler Sand Ladle filler sand is a mixture of refractory raw material (silica sand chromite sand) and It is filled in the nozzle of sliding gate system. Main purpose is to achieve a high free opening rate, avoiding the clogging when the...

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