silica fines

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• iron processing — Introduction       use of a smelting process to turn the ore into a form from which products can be fashioned. Included in this article also is a discussion of the mining of iron and of its preparation for smelting.       Iron (Fe) is a… …   Universalium

• Silicose — La silicose est une maladie pulmonaire provoquée par l inhalation de particules de poussières de silice (silice cristalline) dans les mines[1], les carrières[1], les percements de tunnel ou les chantiers du BTP[2] …   Wikipédia en Français

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• chromium processing — Introduction       preparation of the ore for use in various products.       Chromium (Cr) is a brilliant, hard, refractory metal that melts at 1,857° C (3,375° F) and boils at 2,672° C (4,842° F). In the pure state, it is resistant to ordinary… …   Universalium

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• Passivation — Mécanisme de passivation d un acier inoxydable : les atomes de chrome dans l acier réagissent avec le dioxygène de l air et forment une couche protectrice d oxyde de chrome La passivation ou passivité représente un état des métaux ou des… …   Wikipédia en Français