问题 问答题 简答题

转化炉内配空气时应注意什么?

答案

参考答案:

配空气前应将预热炉炉膛温度适当提高,一般750℃,转化炉床层各点温度在650℃以上,控制空气压力比焦炉气压力高于1Kg∕cm3左右,焦炉气量4000

3—5000Nm∕h为宜,投料前应将各原料气导淋打开排水,然后打开吹扫蒸汽进行吹扫置换,将室内连锁转入手动装置,关闭密封蒸汽,开进入炉内空气截止阀,然后开入转化炉手动截止阀和焦炉气阀,密切注视转化床层温度变化,当温度恢复正常后再逐渐加量,并将各连锁转投到自动状态,维持正常生产。

阅读理解

Most 23-year-olds have not done enough in life to be worthy of having their own documentary(纪录片)

  Most 23-year-olds aren't LeBron James.

  The NBA superstar, who recently won gold at the Beijing Olympics, has just released More Than a Game. It is a documentary that follows his rise to stardom (明星地位) and how he and four childhood friends overcame long odds to win a national championship in high school.

  Combining footage (镜头) taken during James' career at St. Vincent-St. Mary High School in Akron, Ohio, US, along with one-on-one interviews by writer/director Kris Belman, home videos, and personal family photographs, the film is about much more than basketball. At its core (核心) is a story of friendship, loyalty and love.

  "We set out with a goal as kids and we wanted to accomplish that someway, somehow by using basketball as a tool, not knowing that it was going to create other opportunities for us," James said. "We didn't know it was going to create a brotherhood and trust. We grew from kids into young men."

  While James is the star, his former teammates, Dru Joyce III, Sian Cotton, Willie McGee and Romeo Travis, play a major role in the film.

  Their journey began together as 8-year-old boys, winds through years traveling all over America playing in basketball tournaments and finishes in their senior season at St. Vincent-St. Mary High School.

  At the time, Belman was a college film student. He set out to film James and his friends' season as his final school project, a 10-minute documentary. But after gaining the trust of the players and coach Dru Joyce, Belman spent two months filming and eventually teamed with producer Harvey Mason Jr to the full-length feature.

  James hopes the film will inspire youngsters (年轻人).

  "We set out with a goal when we were eight and we accomplished it when we were 18," he said. "It's a great story and I wanted to get it out to kids that have a dream, that they should continue to go after it, believe in it and live it if they want to accomplish something."

小题1:LeBron James achieved his goal set at 8 when        .

A.he won a gold medal at the Beijing Olympics

B.He won a national championship in high school

C.he became a collage student

D.he was interviewed by Kris Belman小题2:Which of the following is unlikely to be included in the description of James?

A.Friendly.

B.Faithful.

C.Hardworking.

D.Self-centered.小题3:More Than a Game is          .

A.James’ favorite story about his childhood

B.a documentary filmed by James’ classmate

C.a film made by Belman

D.an article a bout James’ high school life小题4:We can learn from the passage that More Than a Game is       .

A.inspiring

B.dull

C.puzzling

D.imaginary

单项选择题