A method of improving the properties of reclaimed sand used...

Details A method of improving the properties of reclaimed sand used... A method of improving the properties of reclaimed sand used...

B - Operations, Transporting

22

C

B22C 1/20 (2006.01) B22C 1/02 (2006.01)

Patent

CA 2161897

Particulate refractory aggregate aggregate elutab1e alkali is treated with a particulate active clay having a particle size of less than 0.5 mm in order to reduce the level of the elutable alkali. Sand recovered from spent foundry moulds and cores produced from alkaline binders can be treated to reduce its elutable alkali content and then recycled for further foundry use.

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