Задания к тексту Pig iron production (1, 2, 3)

Exercise 1

Ответьте на следующие вопросы:

 

  1. What basic materials are used in pig iron manufacture?
  2. What is burned as a fuel to heat the blast furnace?
  3. What is used in the blast furnace process as an additional source of carbon monoxide?
  4. Does ordinary pig iron produced by blast furnaces contain 50% of iron?
  5. What does a typical blast furnace consist of?
  6. Is raw material to be fed into the furnace charged in one big portion?
  7. Is air used in a blast furnace preheated to temperatures between approximately 200° and 470° C.?
  8. Is the weight of air used in operation of a blast furnace less than the total weight of other raw materials employed?
  9. When pressurizing of blast furnaces was introduced?
  10. What process can increase the output of blast furnaces?

 

Exercise 2

Заполните пропуски недостающими по смыслу словами, используя текст:

 

  1. The basic materials used for the manufacture of … are iron ore, coke, and limestone.
  2. Ordinary pig iron as produced by blast furnaces contains about 92 percent of … .
  3. A typical blast furnace is lined by … bricks.
  4. The height of the blast furnace is about … meters.
  5. The air used to supply the blast in a blast furnace is … to temperatures between approximately 540° and 870° C.
  6. The heating of air supplied to blast furnace is performed in stoves, cylinders containing networks of ….  
  7. The … in the stoves are heated for several hours by burning blast-furnace gas, the waste gases from the top of the furnace.
  8. The weight of … used in the operation of a blast furnace exceeds the total weight of the other raw materials employed.
  9. The pressurizing technique makes possible better combustion of the … and higher output of … iron.
  10. The output of many blast furnaces can be … 25 percent by pressurizing.

 

Exercise 3

Соответствуют ли данные предложения содержанию текста:

 

  1. The basic materials used for the manufacture of pig iron are iron ore, coal and oil.
  2. The oil is burned as a fuel to heat the furnace.
  3. A typical blast furnace consists of a cylindrical aluminum shell lined with ordinary refractory bricks.
  4. The air used to supply the blast in a blast furnace is precooled to temperatures between 10° and 80° C.
  5. The weight of air used in the operation of a blast furnace is equal to the total weight of the other raw materials employed.
  6. The pressurizing technique makes possible better combustion of the coke and higher output of pig iron.
  7. The output of many blast furnaces can be increased twice by pressurizing.
  8. Enriching the air blast with oxygen can increase the output of blast furnaces.
  9. The container of molten pig iron is transported directly to the rolling mill.