问题 问答题 简答题

在出尽炉底操作时,发生过EAF出钢前[P]为0.010%,但到LF却超出标准的事故,试就此分析回P原因,并应采取何种预防、纠正措施?

答案

参考答案:

EAF出尽炉底操作时由于渣子流得不干净,大量渣进入包内,至LF精炼后造成渣中大量回P,以致出格。

主要采取措施为:(1)尽可能估计好余钢量,使出尽炉底这一炉的钢水保持在75~90t;(2)要造二次渣,第一次渣造好后流掉大部分,再及时补入第二批渣料;(3)撬平炉门,做到尽可能流渣;(4)放钢后若钢包内渣子仍较多,可进行倒渣。

完形填空
完形填空。

     My father was an ill-humored man. I knew he loved me and his love was deep. He just didn't know
how to   1    it.
     One evening we went out for a night on the town. We were sitting in an elegant restaurant that had
a small but lively    2    . When it played a familiar waltz tune I decided to   3    him for a dance.
     "Dad, you know I've never    4    with you before. I begged you but you   5     wanted to. How
about right now?"
     I waited for the   6     refusal. But instead, he considered thoughtfully and then said, "Let's hit the
floor and I'll   7     you just what kind of moves an old guy like me can still make."
     My father took me in his   8     and I felt overcome by emotion.
     As we danced I looked up at my father carefully but he    9     my eyes.
     "Dad," I finally   10    , tears in my eyes, "Why is it so hard for you to look at me?" At last his eyes
dropped to my face. "   11    I love you so much." he whispered back. I was struck dumb by his 
  12    . It wasn't what I had thought. But it was of course exactly what I needed to   13     . I had
always known that he loved me. I just hadn't understood that his vast emotion had   14     him and
made him silent. "I love you too, Dad!" I whispered back softly. He stumbled (结结巴巴地说) over
the next few words: "I'm sorry that I'm not open. It's   15     for me, but just remember how much I
love you."
     When the dance ended I excused myself to the ladies' room and during my absence   16     changed.
     When I came back, Dad sat in his chair   17     his body leaning forward, very pale. Everything was
really too late. He was   18     .
     That night all I saw was his leaning body and pale face. But it's a totally different scene that I   19    
now. I remember him saying "I love you" and my saying it back. The three words  20     on forever
long after we are gone.

( )1.   A. answer
( )2.   A. band  
( )3.   A. invite  
( )4.   A. chatted
( )5.   A. still
( )6.   A. final
( )7.   A. tell
( )8.   A. arms
( )9.   A. noticed
( )10. A. complained
( )11. A. Because
( )12. A. response
( )13. A. find  
( )14. A. surprised
( )15. A. clear
( )16. A. everything
( )17. A. for   
( )18. A. moved   
( )19. A. discover
( )20. A. depend                         
B. express
B. hall  
B. teach  
B. sang
B. even  
B. normal
B. show
B. hands
B. ignored
B. whispered
B. Though
B. advise
B. know  
B. pleased
B. important
B. something
B. with
B. tired
B. remember
B. carry 
C. mention  
C. sofa  
C. help  
C. danced
C. also  
C. rough
C. ask
C. heart
C. avoided
C. explained
C. If   
C. promise
C. hear  
C. inspired
C .impossible
C. nothing
C. on   
C. lost     
C. remind
C. live             
D. understand      
D. bar              
D. show            
D. stayed          
D. never            
D. usual            
D. explain          
D. mind            
D. greeted          
D. shouted          
D. While            
D. excuse          
D. think            
D. frightened      
D. hard            
D. anything        
D. from            
D. gone            
D. consider        
D. take            
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