Study on the Influence of Organic Matter on the Reclamation Quality of Waste Clay-Bonded Sand
High-temperature calcination combined with mechanical grinding method was usually adopted for recycling the foundry waste clay-bonded sand.In order to obtain high-quality reclaimed sand,the calcination temperature is required to be relatively accurate and stable in the reclamation process of waste sand.However,the calcination temperature fluctuates greatly due to the existence of organic matter,such as pulverized coal in the waste clay-bonded sand,especially the organic matter in the fine particle waste sand,which affects the quality and efficiency of the reclaimed sand.In this paper,the waste clay-bonded sand was firstly screened and graded with 100 mesh to investigate the influence of the organic matter in two types of the waste sand on the combustion rate,and then the calculation formula for the contribution of the organic matter in the waste sand was established.According to the actual production test,the contribution threshold of the fuel value of the organic matter and the optimal input of reclamation of the waste sand were obtained,which can provide a theoretical reference for the high-efficiency and high-quality reclamation of the waste clay-bonded sand.
green castingwaste clay-bonded sandorganic matterrecyclingcombustion threshold
国家科技期刊平台
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