粘土砂铸造除尘灰改性热硬化水玻璃砂  

Modification of the Thermo-Hardening Sodium Silicate Sand by Clay Sand Foundry Dust

作　　者：李倩倩 龚小龙 胡胜利 刘鑫旺[1] 樊自田[1] LI Qian-qian;GONG Xiao-long;HU Sheng-li;LIU Xin-Wang;FAN Zi-tian(State Key Laboratory of Material Processing and Die&Mould Technology,School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China)

机构地区：[1]华中科技大学材料科学与工程学院,材料成型与模具技术国家重点实验室,湖北武汉430074

出　　处：《铸造》2022年第11期1403-1404,1405,1406,共4页Foundry

摘　　要：为实现铸造除尘灰的回收利用,尝试将不同粒径和含量的粘土砂铸造除尘灰用于热硬化水玻璃砂改性,取得了初步效果。结果表明:铸造除尘灰作为改性剂能够提高水玻璃砂的24 h抗压强度,并降低水玻璃砂的残留强度;当铸造除尘灰粒径约为25μm,总加入量为原砂重的0.9%时,水玻璃砂具有较好的综合性能,其24 h抗压强度为1.42 MPa,残留强度为0.23 MPa。In order to realize the recycling and utilization of foundry dust, the clay sand foundry dust with different particle size and content was used to modify the thermo-hardening sodium silicate sand, and preliminary results were obtained. The results revealed that as a modification, the foundry dust can actually promote the 24 h compression strength of the sodium silicate sand, and decrease its residual strength. When the particle diameter of foundry dust is 25 μm and the addition is 0.9% of the weight of the sand, the sodium silicate sand has superior mechanical properties, whose 24 h compression strength reaches 1.42 MPa and residual strength reaches 0.23 MPa.

关 键 词：铸造除尘灰 水玻璃砂 热硬化 残留强度 

分 类 号：TG221[金属学及工艺—铸造]