blast furnace slag for pelletisation of iron ore

Blast furnaces operate on the principle of chemical reduction whereby carbon monoxide, having a stronger affinity for the oxygen in iron ore than iron does, reduces the iron to its elemental form. Blast furnaces differ from bloomeries and reverberatory furnaces in that in a blast furnace, flue gas is in direct contact with the ore and iron, allowing carbon monoxide to diffuse into the ore and ...

The terms blast furnace slag (BFS) and granulated blast furnace slag, as well as LD slag and electric furnace slag are used for finer distinctions. With high-quality iron ore grades with an iron content of 64 to 67 %, a blast furnace typically produces about 0.25 to 0.30 t of slag per t of pig iron.

Iron Ore Processing for the Blast Furnace. The iron ore concentrate is now mixed and ready for the pelletizing process. Pelletizing A pellet plant contains a series of balling drums where the iron ore concentrate is formed into soft pellets, in much the same manner that one rolls a snowball, to make a pellet about the size of

Jul 11, 2021· To cite this article: Ammasi Ayyandurai & Jagannath Pal (2021): Blast Furnace Flue Dust as a Potential Carbon Additive in Hematite Ore Pellet, …

• sintering and pelletisation of iron ore • the production of molten iron by the blast furnace route, including slag processing • the production and refining of steel using the basic oxygen process, including upstream ladle desulphurisation, downstream ladle metallurgy and slag processing

Iron Ore Sinter an overview | ScienceDirect Topics. L Lu, O Ishiyama, in Iron Ore, 2015 145 Conclusions Sintering is the most economic and widely used agglomeration process to prepare iron ore fines for blast furnace use Compared with pellets, production of sinter is cheaper, and compared with lump ore, fluxed sinter is often more reducible with better softening characteristics

X-ray diffraction of blast furnace flue dust and sludge as shown in Figuresl, 2 indicates that iron ore mainly consists of hematite and limonite while the main phases in the blast furnace flue dust and sludge are hematite (Fe203), magnetite (Fe304), silica (Si02), limestone (CaC03) and carbon respectively. 2-Theta 2-Theta. Fig. 1.

The maximum basicity of pellets was calculated 2.37 to make slag neutral when blast furnace runs at high ash coke (avg. ash content= 29%). ... Pelletisation Behavior of Flu xed Iron Ore ...

Dec 11, 2016· Need of pelletizing of Iron ores Configuration of Iron ore fines as tightly packed structure that restricts heat and air flow in blast furnace. Utilization of iron ore fines of size even 0.5-0.15mm. Extending the life of iron ore reserves of nation. To improve Blast furnace performance Increase in blast furnace productivity.

1. IRON ORE PELLETIZING The main raw material in iron-steel industry is iron ore. Iron ores can be classified as high grade and low grade in terms of their Fe content. High grade iron ores which can be used directly in the blast furnace to produce metallic iron are not abundant in earth's crust to supply the need of iron-steel industry.

In blast furnace (BF) iron making lime stone is used as source of CaO to neutralize the all acidic oxides present in iron ore and make fluid slag of suitable basicity. Limestone is the most common source of CaO, abundantly available and it has very good strength properties also which make it suitable for using in blast furnace.

Pelletisation Behavior of Fluxed Iron Ore Pellets of Varying Basicities Made with Waste Fines ... The maximum basicity of pellets was calculated 2.37 to make slag neutral when blast furnace runs ...

A blast furnace (BF) is a type of metallurgical furnace used to produce industrial metals, generally, pig iron (aka hot metal), an intermediate product in conventional, coal-based steelmaking.. A blast furnace (BF) is used to smelt iron from iron ore. Blast furnaces produce pig iron (aka hot metal) by reducing carbon (coke from coking coal) in the presence of a fluxing agent like limestone.

The maximum basicity of pellets was calculated 2.37 to make slag neutral when blast furnace runs at high ash coke (avg. ash content= 29%). ... stage pelletisation. Iron ore and coal char ...

V. Reduction of iron ore briquettes into DRI in the tunnel kiln process; VI. Carbon-composite briquetting of iron ore fines & fast-reduction into DRI in the rotary hearth furnace; VII. Vertical grinding mill to make ground, granulated, blast furnace slag (GGBS) VIII. Rock wool making plant, using the molten slag from MAGMA / Blast Furnace; IX.

The Old Metallurgical Engineer and Steelmaker says: Here's how it works: A mix of high-volatile, medium volatile and low-volatile coal (volatile meaning the relative content of xylene, toluene, butadiene and other aromatic hydrocarbons) is coked (...

1500 °C. Molten iron and slag are drawn off at regular intervals from tap holes at the base of the furnace. The quenching of this liquid slag with an excess of water (granulation), air and water (pelletisation) or steam forms a granular product. For each ton iron about 1.6 tons raw material, 330 kg coke, 150 kg coke coal powder and

Nov 26, 2014· Iron Ore Pellets and Pelletization Process Pelletizing of iron ore was started in the 1950s to facilitate the utilization of finely ground iron ore concentrates in steel production. For the pelletizing of iron ore there are two main types of processes namely, the straight travelling grate (STG) process and the grate kiln (GK) process.

•blast furnace benefits of lower SiO2 levels are lower slag volumes. •reduction of pellet SiO2 from 4.30 to 4.00% reduces slag volume by 10 kg/T which reduces coke rate by 2 kg/T and increases hot metal production by 0.5% or about 20 tons/day for a furnace initially producing 4000 tons/day.

1. Iron ore fines severely reduced the permeability of the bed, jeopardizing the reduction reaction in the blast furnace 2. The fines leave the blast furnace in combination with the flue (top) gas, bringing down the efficiency of the furnace. With the projected steel production, requirement of iron ore is …

The sources of hematite and quartz phases are the iron ore pellets which was used during blast furnace operation. Quartz also originates from coke ash. Calcite originates from limestone, which is an additional material added to the blast furnace to produce a suitable blast furnace slag [16] . …

Aug 02, 2021· Abstract: With the consumption of high-quality iron ore resources, the grade of iron ore raw used in the iron making process has gradually decreased. The high aluminum raw materials has led to an increase in the Al2O3 content in the blast furnace slag, which has affected the normal operation of the blast furnace.

Jan 05, 2021· Iron ore fines from mines along with industrial waste having a considerable amount of iron oxide have led to the stress on agglomeration process. Pellets and sinters involve fine iron ore as well as waste generated from integrated steel plants to make up a sized excellent feed material for blast furnace operation.

V. Reduction of iron ore briquettes into DRI in the tunnel kiln process; VI. Carbon-composite briquetting of iron ore fines & fast-reduction into DRI in the rotary hearth furnace; VII. Vertical grinding mill to make ground, granulated, blast furnace slag (GGBS) VIII. Rock wool making plant, using the molten slag from MAGMA / Blast Furnace; IX.

The iron ore fines cannot be directly used in the blast furnace as they severely reduce the permeability of the blast furnace bed and bring down the efficiency of the furnace.

Ground-granulated blast-furnace slag (GGBS or GGBFS) is obtained by quenching molten iron slag (a by-product of iron and steel-making) from a blast furnace in water or steam, to produce a glassy, granular product that is then dried and ground into a fine powder.Ground-granulated blast furnace slag is highly cementitious and high in CSH (calcium silicate hydrates) which is a strength enhancing ...

Blast furnace slag is a by-product of iron manufacturing, via thermochemical reduction, in a blast furnace. Blast furnace slag is formed in a continuous process by melting lime (and/or dolomite), the waste from carbon sources and non-metallic components of iron load (e.g. iron ore, iron sintering).

Jan 01, 1992· Cold bonded pelletization of iron ore fines using ordinary portland cement binder is emerging as a potential energy saving agglomeration process for proper utilization of Indian iron ore fines. The possibility of substituting ordinary portland cement/clinker by cheaper low grade Indian granulated blast furnace slag is investigated.

Jul 01, 2002· Pelletization of the slag concentrate will allow the iron and steel industry to increase profits with higher iron recovery and lower disposal costs, while preventing pollution through lower waste generation. This is the first time that iron units, beneficiated from hot metal desulfurization slag, have been pelletized for reuse as blast furnace ...

These are typically fed to a blast furnace or DRI plant as part of the process to make steel. is supplier of both Straight Grate and Grate Kiln pellet plants. A review of binders in iron ore pelletization Request PDF. Nov 16, 2020· Keywords: iron ore, pelletizing, …