Aluminium hydroxide cements

Brucite [magnesium hydroxide Mg(OH)2] is isostructural with CH. It is formed in Portland cement concrete that has been attacked by magnesium salts, and on hydration of Portland cements high in MgO and possibly of Portland cements in general. It has a = 0.3147 nm, c = 0.4769 nm, Z = 1, >, = 2368kgm", oi = 1.561, e = 1.581 (S63). Three polytypes of aluminium hydroxide [Al(OH)3], gibbsite, bayerite and nordstrandite. contain layers essentially similar to those in brucite, but with an ordered pattern of... 

P. Ya. Zeltser, V. I. Chalykh, L. V. Chemyakhovskij, V. N. Smeta-nin, V. I. Kravchenko, and K. S. Elkin. Light plugging solution production—from mixture of Portland cement, silica-containing dust waste from production of aluminium alloys, sodium hydroxide and water. Patent SU 1728471-A, 1992. 

Before using a particular material in either a bag slitter or a bag dumper it is recommended to check with the manufacturer as some hoppers may not be suitable. However, some examples of materials used in these devices are alumina, aluminium sulphate, carbon black, cement, cocoa beans, cocoa powder, coffee beans, flour, hydrated lime, lime, milk powder, potassium hydroxide, silica sand, sugars, talc, titanium dioxide and whole nuts (Aptech (Powder Systems) Ltd 2006 Hexicon Corporation 2006 Palamatic Materials Handling 2006 Spiroflow Ltd 2006 Vibrair 2006). 

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