Which Group Of Elements Suffer A Loss During Melting In Cupola? - Fixanswer

1. Which of the following cannot be operated through cupola furnace? Explanation: Among the following,

zinc

cannot be operated through cupola furnace, whereas the irons, copper base alloys and some kinds of bronzes are operated using a cupola furnace.

Which coke is used in cupola furnace?

Foundry Coke

Coke

is the fuel used for melting iron in the cupolas of foundries. A cupola consists of a vertical, cylindrical, steel shaft, lined with fire-clay brick. It is provided with a door near the top for introduction of the charge, which consists of alternate layers of coke, limestone, pig iron, and scrap.

Which Tuyeres increase the melting efficiency?

_________ tuyeres increase the melting efficiency. Explanation: The tuyeres are responsible for the supply of air for combustion in the cupola. The tuyeres are always fitted in one or more number of rows.

Auxiliary tuyeres

being more efficient are fitted in the cupola to supply more air and increase melting efficiency.

What is melting ratio of Cupola?

Typical internal diameters of cupolas are 450 mm to 2000 mm diameter wich can be operated on different fuel to metal ratios, giving melt rates of

approximately 1 to 30 tonnes per hour

.

What charge is used for cupola furnace?

(iii) Charging the Cupola:

The charge is composed of

25% pig iron, 50% gray cast iron scrap, 10% steel scrap, 12% coke as fuel, and 3% limestone as flux

. These constituents form alternate layers of coke, limestone and metal.

What is the correct sequence of cupola operation?

Cupola operation is

started by igniting the coke bed at its bottom

. After the Coke bed is properly Ignited, alternate charges of limestone, pig iron, and coke are charged until the level of the charging Door. Then the air blast is turned on and combustion occurs rapidly within the coke bed.

What is the name of the furnace which is used for the manufacture of CI?

Cupola furnace

, in steelmaking, a vertical cylindrical furnace used for melting iron either for casting or for charging in other furnaces.

What is the range of efficiency of cupola furnace?

What is the range of efficiency of cupola? Explanation: The efficiency of cupola is decided by factors like heat used in preheating, heat used in coke, heat used in oxidation and heat in the air blast. The efficiency of a cupola varies from

30% to 50%

.

How does cupola work?

Cupolas were originally

designed to add natural light and ventilation to the area under a roof

. They sit on the ridge of a roof and can be found in many shapes, including square, round, and octagonal. On barns, they’re meant to allow a continuous flow of air into the hayloft, helping to dry the hay.

Which material is most commonly used flux added to the charge in cupola furnace?

Which of the following chemical compound, is the most common flux added to the charge in a cupola furnace? Explanation:

Limestone (CaCO
₃
)

is used as Flux in cupola furnace in a proportion of about 2-4% of the metal charge.

What type of iron is produced in cupola?

The Input to Cupola is

Pig Iron

which is obtained from a blast furnace.

Why is the tuyere water cooled?

Tuyeres and tuyere coolers

They are made of copper and are usually

water cooled since they are directly exposed to the furnace temperature

. They are located all around the blast furnace.

Which one from the following is used for the welding of thick material?

Which of these welding processes are used for welding thick pieces of metals?

Electro-slag welding

is used for joining thick materials in the vertical plane.

When sand is in its natural moist state it is known as?

The sand in its natural or moist state is called

green sand

. It is also called tempered sand. It is a mixture of sand with 20 to 30 percent clay, having total amount of water from 6 to 10 percent.