为了用重选法回收锡石，大厂锡矿需先用粗粒优先浮出硫化矿石，但分选比较困难。
In order to recover cassiterite by gravity separation, it is necessary to separate sulphide minerals from the Dachang cassiterite ores by coarse preferential flotation.
为了用重选法回收锡石，大厂锡矿需先用粗粒优先浮出硫化矿石，但分选比较困难。
In order to recover cassiterite by gravity separation, it is necessary to separate sulphide minerals from the Dachang cassiterite ores by coarse preferential flotation.
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