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Furnaces

The furnace, whose name is derived from the Latin word fornax, which means oven, is a heating device utilized for both home and industrial purposes. Questions about furnaces can be asked and answered here.

1,402 Questions

How do you calculate power required for induction furnace?

To calculate the power required for an induction furnace, you need to consider factors such as the material being melted, desired melting rate, and system efficiency. The formula for calculating power is Power (kW) = (Mass in kg) x (Specific heat of material) x (Temperature rise in °C) x (Melting time in hours) / 860. This calculation gives you an estimate of the power needed to melt a specific amount of material in a given time frame.

Why are stars referred to as atomic furnaces?

It is in the stars that the heavier elements (basically, anything after element #2, helium) are made.

It is in the stars that the heavier elements (basically, anything after element #2, helium) are made.

It is in the stars that the heavier elements (basically, anything after element #2, helium) are made.

It is in the stars that the heavier elements (basically, anything after element #2, helium) are made.

What is the purpose of a chimney pot?

A chimney pot helps improve the draft in a chimney by increasing air flow. It also prevents rainwater from entering the chimney and reduces downdrafts. Additionally, chimney pots can enhance the appearance of a building.

What is the function of a chimney pot?

A chimney pot is designed to increase draft within a chimney by creating a higher exit point for smoke and gases. It helps to draw air through the chimney, improving ventilation and reducing the risk of downdrafts and smoke entering the home. Additionally, chimney pots can also enhance the aesthetic appeal of a building.

Why sodium cannot be extracted by the blast furnace?

Sodium cannot be extracted by the blast furnace because it is a highly reactive metal that forms stable compounds with oxygen. This makes it energetically unfavorable to extract sodium through reduction reactions in a high temperature blast furnace. Instead, electrolysis is typically used to extract sodium from its compounds like sodium chloride.

What does chimney dirt called?

Chimney dirt is commonly referred to as creosote. This is a byproduct of burning wood or other fuels in a fireplace or stove and can build up in the chimney, posing a fire hazard if not cleaned regularly.

What two contaminants are usually found in the water used to cool blast furnaces?

Two common contaminants found in water used to cool blast furnaces are iron and sulfur. Iron can accumulate in the water from the contact with the metal parts of the furnace, while sulfur can be present due to the combustion of sulfur-containing fuels used in the furnace operation.

When a gas furnace ignites and is under full-fire why does the fan not come on immediately?

The fan delay is designed to allow the heat exchanger to warm up before the fan blows air into the ducts. This helps increase efficiency and prevents cool air from being circulated initially. Once the heat exchanger reaches the set temperature, the fan will turn on to distribute warm air throughout the home.

What are the radiations emitted by hot furnace?

A hot furnace emits primarily infrared radiation, which is a form of heat energy. This radiation is invisible to the human eye but can be felt as heat when in close proximity to the furnace.

What are the proess of iron production in blast furnace?

First we add the basic iron production elements (i.e, limiston,coreand processed iron e.g hematite,Fe2O3 )

the coke is react with oxygen and form crbone monoxide

the limestone decomposed to CaO and carbon dioxide,CO2

carbondioxide,CO2 react with Fe2O3 to form Fe and CO

CaO (reaction flux) react with almunia and silica form slag

the Fe is removed as a molton ways below blast furnace and sage is removed anather ways,THANK YOU FOR READ

Why the height of blast furnace is 100ft?

The height of blast furnaces is typically around 100 feet to create enough space for the chemical reactions to occur efficiently. The height allows for gravity to assist in the movement of materials through the furnace, aiding in the reduction of iron ore and the separation of molten iron from impurities. Additionally, a taller furnace enables better temperature distribution and facilitates the flow of hot gases for proper combustion.

What is a furnace coil?

A furnace coil is a component in a heating system that is responsible for converting electricity or fuel into heat. It consists of a coil of metal tubing through which a heat transfer fluid, such as air or water, flows to transfer the heat to the surrounding space. Furnace coils are commonly found in electric furnaces and boilers.

What size breaker for furnace?

The size of the breaker for a furnace will depend on the specific requirements of the furnace unit. It is recommended to check the furnace's user manual or consult with a qualified electrician to determine the correct breaker size for your particular furnace model. Using the wrong size breaker can be a safety hazard.

Why you used carbon refractory at blast furnace?

Carbon refractories are used in blast furnaces because of their high resistance to heat and thermal shock. They can withstand the extreme temperatures and chemical reactions that occur during the iron-making process. Additionally, carbon refractories have good thermal conductivity, allowing them to efficiently transfer heat in the furnace.

Why do houses have chimney?

Because they have fireplaces that need to vent to the exterior.

What causes white smoke from a gas furnace?

White smoke coming from a gas furnace can be caused by a few factors: a blocked flue or air intake, a cracked heat exchanger, or excess moisture in the combustion chamber. It is important to address this issue promptly as it can indicate a potentially dangerous problem with your furnace. It is recommended to shut off your furnace and contact a professional HVAC technician to inspect and repair the issue.

How far from the furnace does the thermostat have to be?

Thermostats should ideally be placed on an interior wall, away from drafts, direct sunlight, doorways, and windows. It is recommended to install them at least 5 feet away from heating and cooling sources, such as furnaces, to ensure accurate temperature readings and proper functioning of the HVAC system.

Is coal burned in a furnace?

Yes, coal can be burned in a furnace to generate heat or electricity. When coal is burned, it releases energy in the form of heat which can then be used for various purposes. However, burning coal releases harmful emissions into the atmosphere, contributing to air pollution and climate change.

What is the function of limestone in the furnace?

Limestone is added to the furnace as a flux to help remove impurities from the iron ore during the iron-making process. It reacts with the impurities to form slag, which can be easily removed from the molten iron.

How does smoke move in the chimney?

Smoke moves in the chimney due to the difference in temperature and pressure between the inside and outside of the chimney. As hot air rises, it creates a draft that draws the smoke up and out of the chimney. The design of the chimney, including its height and width, can also impact how efficiently the smoke is expelled.

What temp should home furnace flue gas be to rise up a chimney?

Home furnace flue gas should ideally be between 300-500 degrees Fahrenheit to help it rise up the chimney efficiently and safely without causing any harmful buildup or backdraft. Regular inspection and maintenance of the chimney and flue are recommended to ensure proper functioning.

Why can you get pure gold straight out of the ground but you need furnaces or electrolysis to get iron or aluminum?

Gold is typically found in its pure form in nature due to its inert nature and resistance to oxidation. In contrast, iron and aluminum are chemically reactive metals that form compounds with other elements, requiring extraction processes like smelting or electrolysis to isolate them from their respective ores.

What is the density of furnace oil at 120 degree c?

The density of furnace oil at 120 degrees Celsius may vary depending on the specific composition of the oil. However, as a general estimate, the density of furnace oil at this temperature is typically around 0.9 - 0.95 grams per cubic centimeter.

What is the charge in the blast furnace?

The charge in the blast furnace typically consists of iron ore, coke (a form of coal), and limestone. The iron ore is the main source of iron, the coke provides the heat and reducing agent, while the limestone helps remove impurities in the form of slag.