矿浆浓度与浮选条件和矿石性质有什么关系？_爱下问搜题

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问题问答题简答题

矿浆浓度与浮选条件和矿石性质有什么关系？

答案

参考答案：

浮选时最适宜的矿浆浓度的确定与矿石性质和浮选条件有关，一般的规律是：

1）浮选比重大的矿物采用较浓的矿浆，浮选比重小的矿物则采用较稀的矿浆；

2）浮选粗粒物料用较浓矿浆，浮选细粒和泥状物料则用较稀矿浆；

3）粗选和扫选采用较浓矿浆，可以减少药剂消耗和浮选机台数，而精选则采用较稀矿浆，可以获得质量较高的合格精矿。

矿石粗选时矿浆浓度25—35%，浮选细粒及含泥高的矿石为10—20%。

选择题

— It's too hot. What about having a glass of cold drink?

— ______! [ ]

A. Good idea

B. Good luck

C. That's right

D. Me, too

完形填空

Once upon a time there was a little boy who became very ill.He had to spend all day in bed, unable to ____.Because other children weren't allowed to come near him, he ____ greatly, and spent his days feeling sad and ____.
There wasn't much he could do ____ look out of the window.Time passed, and his feeling of ___ just grew.Until one day he saw a strange ____ in the window.It was a penguin ____ a sausage sandwich.The penguin squeezed in ____ the open window, said “good afternoon” to the boy, ____ around, and left.
Of course, the boy was very ____.He was still trying to ____ what had happened, and as more crazylooking characters appeared out the window, he burst out ____ and found it hard to stop.
The little boy didn't tell anyone about this because who would have ____ him? Even so, those strange characters ended up putting ____ back in his heart, and in his body.Before long, his ____ had improved so much that he was able to go back to school again.
There he got to talk to his ____， and tell them all the ____ things he had seen.While he was talking to his best friend he saw something ___ out of his friend's school bag.The boy asked his friend what it was, and he was so ____ that finally his friend had to show him what was in the bag：
There, inside, were all the fancydress suits and disguises(假扮的东西) that his friends had been using to try to ____ the little boy up!
And from that day on, the little boy always did his best to make sure that no one felt sad and alone.

B．disappointed

D．interesting