湿型砂使用钙基膨润土的可能性

摘要

总结归纳了钠化膨润土的优缺点;综述了型砂抗夹砂性能试验情况,认为钠化处理膨润土确实能提高型砂的抗夹砂性,型砂加糊精、淀粉、重油和优质煤粉都能够提高抗夹砂性;为简化旧砂再生过程,建议用优质钙基膨润土替代钠化膨润土.%The advantages and disadvantages of sodium-ionized bentonite were summarized. The test situation of the anti-scabbing property of moulding sand was described. It was considered that the sodium-treated bentonite could surely improve the anti -scabbing property of moulding sand; and adding dextrin, starch, heavy oil and high quality coal dust also could improve anti-scabbing property. In order to simplify the reclamation process of the returned sand, it was suggested to use high quality calcium base bentonite as the substitute for the sodium-ionized bentonite.