问题 问答题 简答题

管道行程如何调节

答案

参考答案:

1、当出现明显的风压下降,风量上升,且下料缓慢不正常现象,应及时减风5%-10%。

2、富氧鼓风的高炉应适当减氧或停氧,并相应减煤或停煤,如炉温较高可降低风温50-100℃。

3、当探尺出现连续滑落,风量风压剧烈波动时应转常压操作并相应减风。

4、出现中心管道时,无钟高炉可临时装2-4批αk>αp的料或增加内环的矿石布料份数。

5、若出现边缘管道时,可临时装入2-4批正混装,无钟高炉可在管道部位装2-4批扇形布料或定点布料。

6、严重管道行程时要加净焦若干批,以疏松料柱和防止大凉。

7、采取上述措施无效时,可放风坐料,并适当加净焦,回风压差要比正常压差相应降低0.01-0.02Mpa。

8、如定向管道长期不能好转,应考虑休风堵管道部位风口,然后再慢风逐渐恢复。

9、如有结构上的缺陷,在边缘不断产生管道,应将该管道处的风口、改小或堵死。

阅读理解

C

While they were almost unknown twenty years ago, it seems that mobile phones these days are part of everyone’s life. However, as with other inventions such as the television and the computer, they are a double-edged sword, inviting both supporters and opponents, especially in regard to their use in public places like restaurants and cinemas.

One of the strongest arguments in favor of forbidding mobiles in public places is the trouble they cause to other people. For example, although we are often asked to turn off our phones when in a cinema, the film that we are watching is often interrupted by the sound of at least five rings. To make it even worse, some people insist on continuing their conversation, even though hundreds of people can hear what they say, which often drowns out the voice from the film. As a result, many people would welcome a ban on mobile phones in places where they might disturb other people.

On the other hand, there are a number of arguments against such a ban. It is difficult to stop people bringing with them their mobile phones in public places, making it almost impossible to call for a ban. Some people would see this as an infringement(侵犯)of their rights, while other people would say they need them in case of an emergency. Despite being asked to silence their phones, some people insist on leaving them on.

It seems to me that a ban on mobile phones would not have any result in the end. People will find a way to escape a ban. Nevertheless, people should be discouraged from using them in public places, unless it is highly necessary. They should be made to know that it is bad manners to use them in certain places or at certain times. Of course, there will always be someone who thinks their call is more important than others’ peace and quiet!

53. Why are many people for a ban on the use of mobiles in public places?

A. Because hundreds of people can hear them talk.

B. Because they are asked to turn off their mobiles.

C. Because other people’s peace and quiet is more important.

D. Because many people find a way to escape a ban.

54. Among those who are against a ban, some believe that __________.

A. they can turn off their mobiles when it is necessary

B. it is their right to use their mobiles in public places

C. a ban on mobiles would not have any result

D. they can silence their mobiles when in public places

55. The author of the text thinks that __________.

A. mobiles can be used in case of an emergency in public places

B. mobiles should be turned off in public places

C. mobiles should not be banned in public places

D. it is possible to ban the use of mobiles in public places

56. Which of the following would be the best title for the text?

A. Disadvantages of Mobiles in Public Places

B. Why Not Ban Mobiles in Public Places?

C. Should Mobiles Be Banned in Public Places?

D. Manners for Mobile Users in Public Places

单项选择题 A1型题