问题 问答题 简答题

竖炉正常炉况下应具备哪些特征?

答案

参考答案:

(1)下料顺利,东西南北四面下料均匀,快慢基本一致,排矿均匀;

(2)燃烧室温度稳定,压力适宜稳定,炉内透气性好;

(3)煤气助燃风,冷却风的流量和压力稳定;

(4)烘干床气流分布均匀、稳定,生球不爆裂,干球均匀入炉;

(5)炉身各点温度稳定,竖炉同一平面两端的炉墙温度差小于60℃;

(6)链板机排出的球中大块少,成品球发瓦蓝色,排出球温度较低且稳定;

(7)成品球强度高、返矿量少,FeO含量低且稳定。

阅读理解

III 、阅读理解

London Thursday July 26 (Reuters)---Ian Johnstone missed his girlfriend so much that he flew back to Britain from Australia to propose to her(向……求婚). The problem is that she flew in the opposite direction.

He and Amy Dolby could even have met each other when they sat in the same airport waiting-room in Singapore at the same time to wait for connecting flights(航班).

Dolby, heartbroken when she arrived at Johnstine’s Sydney apartment to find he had flown to London, told the times: “It was as though someone was playing a cruel joke on us. He is the most romantic(浪漫的) person I have ever known. I think our problem is that we are both quite impulsive(冲动的)people. We are always trying to surprise each other.”

After an 11,000-mile flight across the globe, she was greeted by Johnstone’s astonished flat mate asking what she was doing there.

“The terrible truth dawned (明朗)when I found that Ian’s suitcase and most of his clothing were missing. I sat on the end of his bed and cried my eyes out. And that really made me angry,” she said.

Johnstone, a 27-year-old bricklayer, had taken a year off to travel around Australia. But he was missing Dolby, a 26-year-old secretary, so much he got a job on a Sydney building site(建筑工地)and started saving for surprise.

He then flew home to Britain and went to her apartment armed with an engagement ring(订婚戒指), champagne(香濱酒) and flowers.

“I really missed Amy and I had been thinking about her all the time. I thought she was winding me up when she phoned me from Australia,” he said.

Johnstone then asked Dolby to marry him on the phone. “I didn’t know whether to laugh or cry but I accepted,” she said.

Dolby was given a short tour of Sydney by Johnstone’s friends and Johnstone had to stay in Britain for two weeks because he could not change his ticket.

1. It can be learned from the text that_______.

A. Dolby was heartbroken when she heard Johnstone refused to see her.

B. Johnstone worked in Sydney and went to Britain on business

C. Dolby was greeted by Johnstone’s flat mate at the airport

D. Johnstone failed to see Dolby in her apartment in Britain

2. According to the text, it seemed that_______.

A. Dolby wanted to go sightseeing in Sydney alone

B. Johnstone and Dolby could have seen each other in Singapore

C. Dolby stayed longer in Sydney than Johnstone stayed in Britain

D. the young lovestruck couple had both intended to propose to each other

3. When Johnstone asked her to marry him on the phone, Dolby felt_______.

A. nervous and shy                B. cheerful and angry

C. excited and shocked             D. confused and sad

4. Which of the following shows the right order of what happened in the text?

a. Johnstone flew back to Britain to propose to his girlfriend, Amy Dolby.

b. Johnstone started working at a Sydney building site.

c. Johnstone went to Amy’s apartment in Britain with an engagement ring.

d. Johnstone proposed to Dolby over the phone.

e. They were waiting for their connecting flight in the airport lounge in Singapore.

f. Dolby called Johnstone from Australia.

A. b-a-d-e-c-f      B. c-a b-e-f-d       C. b-a-e-c-f-d      D. b-a-f-e-c-d

单项选择题