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By J. A. H. Oates

- glossy makes use of of conventional fabrics - 'Lime and Limestone' is a complete and up to date presentation of the most clinical and technological points of the quarrying, processing, calcining and slaking of lime and limestone items. It pla

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Additional resources for Lime and Limestone: Chemistry and Technology, Production and Uses

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2) are based on texture and structure. All limestones are crystalline, with average grain sizes ranging from less than 4 pm to about 1000pm. The distribution of grain sizes affects the texture, and ranges from mudstone (mainly calcitic mud with few coarse grains) to grainstone (mainly coarse grains with little mud cement). Crystal structure. 1]. Specific gravity. 1]. 1 Physical Properties 19 0 Porosity. The porosity of limestone varies considerably depending on the degree of compaction and the structure.

5. 6 Current Trends in Quarrying 35 Rubber-tyred front end loaders are widely used for loading at the quarry face (Fig. 6). They require well fragmented rock and a level, firm and dry quarry floor. 6). g. from loading dump trucks at the quarry face to loading road vehicles from stockyards). Tyre wear can be a problem when operating on abrasive rock, but this can be contained by fitting chain meshes over the tyres. 6. 5 Hauling Haulage is a major variable cost in producing limestone products. The most widely used vehicle for hauling rock from the quarry face to the primary crusher is the rigid-bodied dump truck, which is available in sizes ranging from 15 to over 150tonnes capacity.

2), which form calcium and magnesium bicarbonates. 9]. CaC03 + H20 + CO2 F! Ca(HCO& MgC03 + H 2 0 + CO2 s Mg(HC03)z On heating a solution of calciudmagnesium bicarbonates, carbon dioxide is evolved and calciudmagnesium carbonates precipitate (this mechanism accounts for the formation of scale in kettles and boilers in hard water areas). 0 p H in water. 0. 9]. 0 Reaction with aqueous acids. In general, limestones react readily with acids and are used for acid neutralisation. High calcium limestones react readily with dilute hydrochloric and nitric acids at ambient temperatures, whereas dolomite and dolomitic limestones only react readily when the dilute acid is heated.

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