Research on the Composite Reclamation Technology of Clay Resin Mixed Foundry Waste Sands
In this paper,the reclamation of different clay resin mixed waste sands were investigated.A composite reclamation method was proposed to reclaim these sands,as compared to water scrubbing reclamation method.The surface morphology and properties of the reclaimed sands were studied.The results show that the process route of"water scrubbing+alkali liquor soaking/acid liquor soaking+roasting"was appropriate,which could combine the advantages of different methods and lead to an ideal result.In details,the waste sands have been water washing six times with a speed of 400 r/min,and each duration time is 5 min.At the initial scrubbing,4 ml alkali liquor was added with concentration of 0.1 mol/L,while 6 ml acid with the same concentration was added when after scrubbing.Finally,the modified sands were roasted at 700 ℃ for 15 min and cooled to room temperature.The mud content,acid consumption value,loss on ignition are 0.18％,2.61 mL and 0.08％,respectively,which meet the industry standard and customer requirements.
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