问题 问答题 简答题

半直接浮选的煤泥水原则流程主要有哪几种形式?

答案

参考答案:

半直接浮选的煤泥水原则流程主要有两种形式:

(1)水力分级设备分流出一部分溢流不经浓缩,直接作为浮选入料的稀释水,其余部分经浓缩后浮选。这样既可使入浮煤浆浓度不至过低,同时也减轻澄清浓缩设备的负荷,降低其溢流中携带细泥的数量;

(2)在主、再选跳汰机分设水力分级设备的大型选煤厂,主选机的水力分级设备溢流直接去浮选,再选机的水力分级设备溢流作为循环水使用。

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                                                                              Big Sale! 
                                                                        This Week Only!
Were             This week      Will be
pencils  10 cents 5 cents 15 cents
pens120 cents 60 cents
79 cents
exercise books 89 cents 60 cents 85 cents
letter paper (100 pieces) 2.59 dollars 2.00 dollars 2.99 dollars
All story-books 30% off
T-shirts 4.98 dollars 3.50 dollars 6.00 dollars
jackets 22.5 dollars 18.oo dollars 25.99 dollars
1. How much did two hundred pieces of letter paper cost last week?
                                                                                                                             
2. How much will you pay for three exercise books next week?
                                                                                                                             
3. If a story-book costs 15.00 dollars. How much does it cost today?
                                                                                                                             
4. If you buy a T-shirt this week, how much more money can you save than last week?
                                                                                                                             
5. How much were two jackets last Monday?
                                                                                                                             
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