膨潤土加入量對粘土濕型砂性能影響的研究

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Abstract： In the process of sand mixing，the effect of the effective bentonite content of recycled sand on the performance of molding sand was studied with the change of sand mixing time. At the same time，with the change of bentonite supplemental amount，the influence of supplemental amount on the properties of molding sand was studied.The results show that the properties of molding sand vary with the content of available bentonite in recycled sand and the amount of bentonite added during sand mixing.The study result provides a guiding basis for determining and selecting the effective bentonitecontent of recycled sandand the adition amount of bentonite in sand mixing.

Keywords： bentonite; addition amount; recycled sand; properties of molding sand

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鑄造用膨潤土是一種主要以蒙脫石為礦物組分的非金屬物質(zhì)，因其黏結(jié)力和可塑性強(qiáng)，脫膜性和透氣性好，以及濕態(tài)高溫條件下化學(xué)、物理性能穩(wěn)定等特點(diǎn)，所以在各種化學(xué)黏結(jié)材料蓬勃發(fā)展的當(dāng)下，仍是不可替代的造型原料。（剩余6771字）