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对于电解槽容易冒料问题,应采取什么措施减少冒料,及设备改良方案?

答案

参考答案:

冒料主要是由于风压过大及电解槽料箱泄压不及时造成的可采取以下几点措施:

(1)加强巡检,满料后及时关闭该槽供风。

(2)合理调整风压,不能过大。

(3)调整好风机出口低压控制阀,使其起到作用。

(4)可适当改进料箱排气方式,避免泄压不及时。

(5)加装料位计及自动控制方式,料箱满料后,关闭该槽或该区。

阅读理解

阅读理解。

     The other day in school we were discussing jobs. Our teacher, Mrs. Bolt, said that vocations were very

important and that it was never too early to think about your life's work. Most of the children really weren't

too sure about what they wanted to be. But I knew exactly what I wanted to be, and when Mrs. Bolt asked

me, I replied "A truck driver."

      "A truck driver," repeated Mrs. Bolt. "Why do you want to be a truck driver, Kenneth?" 

     "Because truck drivers are always on the move. They don't have to sit at desks all day. They're out on

the road and they see a lot of the country. The pay is good, too. And you never have any homework."

     The class laughed.

     "Well, Kenneth," answered Mrs. Bolt. "You certainly sound enthusiastic. I guessed that you don't like

sitting at a desk or doing homework. Is that correct, Kenneth?"

     "Yes, I guess so," I said.

     "Well, since you are so interested in becoming a truck driver, I think you should investigate the field a little

further. I want you to go to the library and take out a book on truck driving. And I want you to write a book

report on it and hand it at the end of the month."

     "That's the last time I'll ever tell anybody my secret ambition!"

1. The word "vocations" in the first paragraph here means _____.

A. works

B. jobs

C. holidays

D. ambition

2. Why did Mrs. Bolt ask Kenneth to write the book report? Because _____.

A. she wanted him to learn about the other side of truck driving

B. she was angry with him

C. she was not satisfied with the reasons he gave

D. she wanted the whole class to follow his example

3. Which sentence does not agree with the general idea of the text?

A. Truck drivers are well paid.

B. Kenneth's wish made the whole class burst into laughter Kenneth enjoyed sitting at a desk

    doing his lessons.

C. Mrs. Bolt wanted Kenneth to write a book report.

D. It seemed as if Kenneth did not enjoy sitting at a desk or doing his lessons .

4. Why won't Kenneth tell about his ambition any more?

A. Because he can't realize his ambition

B. He just got more homework to do because he had told Mrs. Bolt about it

C. Because he was scolded by Mrs. Bolt

D. Because he was laughed at by the whole class

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