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酸性陶土,用于翻砂,在中国还是初见.这种粘土,放在水中,具有显著的膨胀性能,并且具有极其强烈的结合作用.型砂用它来做粘结剂,可以解决许多翻砂上的困难.工业先进国家的铸造工作中应用极广,在国外叫Bentonlte,在日本叫膨润土或万能粘土,以前国内很少有人去关心这种问题,据熟习陶土的商人谈,我国在廿多年前,就有了开采,因在国内找不到销路,大都辦理出口,经过外国厂商的加工,再运销到我国来,利权外溢,实在太可痛心了.
Acid clay, used for foundry in China, is still the first to see this clay in water, with significant expansion properties, and has a very strong combination of sand used as a binder, you can solve a lot of sand Difficulties. Advanced industrial countries in the casting work is very widely used in other countries called Bentonlte, bentonite or universal clay in Japan, before few people in the country to care about this problem, according to traders familiar with clay, our country more than 20 years ago, There has been mining, because in the country can not find sales, mostly for export, after processing by foreign firms, and then shipped to our country, the spill of profits, it is too painful.