铸造材料
覆膜砂原沙用哪里的好?
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2020-08-31 15:28
覆膜砂的原沙有用北方沙,有的用海南沙,他们之间有什么区别,价格差距大吗?
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1楼
2020-08-31 15:28
大林砂好,角形系数优
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2楼
2020-08-31 15:28
用海南砂好些.北方砂含硅量偏低,耐火度不够.海砂角形差少少,但耐火度好.特别高硅砂旧砂热法再生后膨胀率有所减低.应比北方砂好些.如湿型砂就不一样了.当然,价格要高些(主要是运费).
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