摘要
介绍了多种旧砂再生方案的特点及适用范围,并阐述了混合旧砂再生后用于制冷芯的试验验证,利用3 t/h贯通式焙烧炉热法再生,机械研磨机进行机械研磨,得到的再生砂回收率为80%,并通过4组试验数据得出,再生砂与原砂的配比为3:1时,型砂瞬时强度达到0.70 MPa,24 h强度达到1.80 MPa。
Characteristics and usage scope of several used sand reclamation processes were introduced and the test-validation of applying the reclamation-treated mixed sand to make cold-box core was described. The reclamation rate of the reclaimed sand was of 80% after being hot reclamation-treated in 3 t/h run-through type baking furnace and mechanically ground with mechanical grinding machine. Based on 4 group test data,it was concluded that,when the mixing ration of the reclaimed sand and raw sand was of 3:1,the instantaneous strength of the molding sand reached 0.70 MPa,the 24 h strength reached 1.80 MPa.
引文
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