Blast Furnace Process
The blast furnace is a continuously operating shaft furnace based on the counter-current flow principle. At the top coke and burden (sinter, pellets, lump ore, and flux) are charged in alternating layers. Charge materials descend under the influence of gravity. In the lower part of the furnace, hot blast from hot stoves is injected through tuyeres.
HOW A BLAST FURNACE WORKS
dirty gases. These gases exit the top of the blast furnace and proceed through gas cleaning equipment where particulate matter is removed from the gas and the gas is cooled. This gas has a considerable energy value so it is burned as a fuel in the "hot blast stoves" which are used to preheat the air entering the blast furnace to become "hot blast".
Investigation of Heat Recovery and Saving Potential of Hot Stoves …
Blast furnaces are essential departments that consuming the largest energy amount in integrated iron and steel factories. Blast furnaces consist of many vital subsections for survival of iron and ...
Blast Furnace and Stoves
The hot blast air is produced by passing cold blast air through preheated chambers or 'stoves', and heating the air to above 1000°C. The stove is first heated up by burning gas and combustion air within the chamber and allowing the heat to be absorbed into the brickwork, or 'chequerwork'.
Analysis of efficiency and reliability of blast–furnace process waste heat recovery systems
Experiments were carried out in the hot stoves of the No.2 Blast Furnace in CSC to explore the waste heat recovery effect on the efficiency of the hot blast generating process.
Case Analysis of Blast Furnace Consumption Technology and …
After joint reforming and iron extraction, the remaining tailings can be consumed in cement and material production. Small blast furnaces can be used as solid waste disposal …
BLAST FURNACE
chamber burns gases from the blast furnace and from other sources such as the coking plant. The regenerative chamber is filled with a checkerwork of refractory brick, heated by the burned gas. …
(PDF) REHEATING FURNACES IN THE STEEL INDUSTRY: …
The reheating furnace of the steel industry was evaluated in the present study, which uses the gas mixture from coke oven (COG), steelmaking process "Linz-Donawitz" (LDG) and blast furnace (BFG).
Industrial Waste Guide: Blast Furnace Department of the …
The blast furnace is a vertical, quasi cylindrical structure, ranging from 65 to 106 feet high and 15 to 28 feet in diameter. In operation, it is main tained full of a mixture of ore, coke, and …
How blast rate variation affects dynamic in-furnace …
The blast furnace (BF) is the most energy-consuming and important reactor in ironmaking industries at present (i.e., conventional BFs) and in the near term (i.e., novel BFs) [1].In the BF process, iron ore and coke are loaded alternately at the furnace top, and hot blast is introduced into the lower part of the furnace along the circumference through the tuyeres, …
Typical chemical composition of blast furnace slags.
Download scientific diagram | Typical chemical composition of blast furnace slags. from publication: Ironmaking and Steelmaking Slags as Sustainable Adsorbents for Industrial Effluents and ...
Blast Furnace and Stoves
Blast Furnace The blast furnace area provides the raw material for steel-making. Iron produced in the blast furnace contains a high proportion of ca. Latest Articles; ... allowing gas and air to enter the stove, and the waste gases to leave once the gas has been burned. When the stove is up to temperature these valves are closed again, leaving ...
CHARACTERIZATION OF SOME BLAST FURNACE …
In this study, we focus on pulverulent wastes, resulted from incomplete combustion of powder coal injected in the blast furnaces tuyere and, complex transformations of coke taking place in the blast furnace.
Analysis of efficiency and reliability of blast–furnace process waste
One of the factors that reduce the hot blast stove block efficiency is the existence of losses with the waste gases, the heat of which can be recovered and used for combustion air...
Effective Utilization of Blast Furnace Flue Dust of …
Blast furnace flue dust is generally contained of fine solid particles recovered from wet cleaning of the gases emerging from blast furnace operations. Due to its inherent moisture content, it …
Blast Furnace Gas, Production and Usage of | SpringerLink
Blast furnace gas, also called top gas, is the combustible gas produced in blast furnace ironmaking, an important gas fuel in an iron and steel complex.Pure blast furnace gas is colorless and tasteless, with a density of about 1.3 kg/m 3.The blast furnace gas composition and calorific value are related to the blast furnace fuel, the variety of pig iron, and the ironmaking …
Hot Blast Stove Refractories
Normally three or more hot-blast stoves are needed per blast furnace. Hot-blast stoves for large blast furnaces are of 40 m or more in height. In hot-blast stove operation, high-temperature combustion gas is generated in the combustion chamber which is sent to the checker chamber to heat the checker bricks for a certain period of time.
An Exergy Study of Cowper Stove Operations with an Iron Blast Furnace
This study examines the operations of the Cowper stoves attached to an iron blast furnace from a Second Law perspective. The exergetic efficiency of a 3-stove system operating at cyclic steady state is determined using a model accounting for the thermal, mechanical, and chemical flow exergies of the top gas and blast air, as well as the thermal exergy stored and …
Emissions and Removal of Gaseous Pollutants from the Top-gas of a Blast
The resulting calorific value of the blast furnace gas is in the range of 2.7 MJ/m 3 (STP) to 4.0 MJ/m 3 (STP). 1) Therefore, the blast furnace gas is used as a fuel in hot blast stoves, boilers and other burners. For the trouble-free burner operation a low dust concentration in the blast furnace gas is required.
BLAST FURNACE
BLAST FURNACE STOVE DOME AND HOT BLAST MAIN The quality and composition of iron produced in the blast furnace is directly related to the hearth temperature. This, in turn, is dependent on the temperature of the hot blast delivered from the ... the blast furnace waste gases. After a period of accumulation, flow is reversed, and the hot stove is used
USE OF INDUSTRIAL GASES IN BLAST-FURNACE …
The main fuel for blast-furnace stoves is blast-furnace gas that has been enriched with natural gas or coke-oven gas (CG) to raise its calorific value. The percentage of blast-furnace gas in this mixture is usu- ... shows that it is possible to reduce the volume of waste gases formed when hot metal is being transferred from a mixer to a ladle ...
An Exergy Study of Cowper Stove Operations with an …
Keywords Cowper stove Blast furnace Exergy Introduction Energy is a large part of the cost of blast furnace ironmaking and one effort to save on that cost is the use of Cowper stoves [1]. These devices are regenerative heat exchangers, burning furnace waste gases and storing the heat to later preheat the blast gas.
Gas composition of blast furnace. | Download Scientific …
The hot blast stove is one of the most important equipment devices in the blast furnace iron making process. The temperature and duration of hot air are the crucial parameters to assess the ...
ENGINEERED CONTROL SYSTEMS
composition and level. ... uninterrupted and consistent hot blast to the blast furnace. Stove cycling systems have been designed for 2, 3, and 4 stove operation. Control of the Process gasses and firing strategies, including Level 1 control optimization, and burner management capabilities. In addition, preheated air and
Using Blast Furnace Gas for Power Production
– blast furnace gas composition: СО – 28,7%; СО₂ – 16,5%; Н₂ – 12,1%; N₂ – 42,7%; ... a part of blast furnace gas is burned in hot blast stoves to raise the temperature of air that is injected into the furnace. In modern blast furnaces the hot blast temperature rises to 1200 °C. ... The heat of exhaust gases after the gas ...
Blast Furnace and Stoves
Blast Furnace The blast furnace area provides the raw material for steel-making. Iron produced in the blast furnace contains a high proportion of ca. Latest Articles; ... allowing gas and air to enter the stove, and the waste gases to leave once …
Efficiency improvement of the hot blast generating …
Experiments were carried out in the hot stoves of the No.2 Blast Furnace in CSC to explore the waste heat recovery effect on the efficiency of the hot blast generating process.
Modelling and control of pollutant formation in blast stoves
The formation of nitrogen oxide NO is investigated for the combustion of enriched blast furnace gas in a blast stove of the voestalpine Stahl Linz. The pollution formation is modelled with Computational Fluid Dynamics (CFD) considering detailed reaction chemistry.
Blast Furnace and Stoves
The hot blast air is produced by passing cold blast air through preheated chambers or 'stoves', and heating the air to above 1000°C. The stove is first heated up by burning gas and combustion air within the chamber and allowing …
Emissions and Removal of Gaseous Pollutants …
The composition of the blast furnace top-gas (CO 2, CO and H 2) and the operation conditions of the scrubber - volumetric top-gas flow, gas temperature, scrubber water flow, scrubber pressure drop and pH-value of the …