Maroon Engineers & Consultant Pvt Ltd

Sand & Core sand minings

A core is a sand or metal insert used to shape any part of a casting that cannot be shaped by the primary removable pattern. When a pattern is pressed into sand and then extracted it leaves a concave impression. Liquid metal fills this void and cools. Cores are created to allow more complexity in the design. Well-constructed cores create holes or chambers in a casting. Automotive engine molds might have up to five cores in them to create the chambers necessary for the working of a combustion engine.

Cores can also help create angles that would be impossible with a pattern. Any overhang above an empty space would make it impossible to withdraw the pattern without breaking the overhang. In these instances, a core can be used.Castings using internal cores usually have some opening in the outer shell of the molding to extract the core after casting, though this opening might be plugged mechanically during finishing.

Where is Maroon found?

Deposits of mineral sands are formed along ancient coastlines where the heavier minerals were concentrated by wave and wind action. Most mineral sand deposits are found in unconsolidated fossil shorelines several hundred metres to tens of kilometres – or occasionally hundreds of kilometres – inland from the present coastline. Major deposits are found in Australia and Southern Africa, but also in South and Southeast Asia, China, East and West Africa, Ukraine and in North and South America.

How is Maroon mined?

Mining of mineral sands can be by both dry mining and wet (dredge) mining methods. In some countries, mineral sands products, principally titanium minerals, are also recovered from hard rock mining methods.

Dry mining is suitable where deposits are shallow, contain hard bands of rock, or are in a series of unconnected ore bodies. Dry mining operations use trucks, excavators, scrapers, loaders or dozer push techniques to recover ore to a mining unit plant. This then conveys the ore to a wet concentrator plant, by slurry pipeline or overland conveyor.