湿型砂使用钙基膨润土的可能性

The Possibility of Using Ca-bentonite for Green Molding Sand

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.