• Limestone and Dolomite and their Use in Iron and Steel

    2013-5-8 · Limestone and lime products are used as fluxing material both in ironmaking and in steelmaking. Basically limestone is used as a slag former while dolomite is used as a slag former slag modifier and as a refractory material. The process of iron making is the reduction of iron ore

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  • Development of an iron ore sinter process model to

    2014-8-5 · Development of an iron ore sinter process model to predict sinter strand operating parameters using the finite difference method J. Muller T.L. de Vries B.A. Dippenaar and J.C. Vreugdenburg Kumba Iron Ore Anglo American plc Iron ore fines are agglomerated in the sintering process to produce sinter an important feed

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  • Steelmaking Processan overview ScienceDirect Topics

    During the steelmaking process fluxes that consist of lime (CaO) or dolomitic lime with iron and scraps are charged to the furnace.There is a certain amount of free lime (f-CaO) in steel slag. Free lime with a specific gravity of 3.34 can react with water to produce Ca(OH) 2 with a specific gravity of 2.23 which results in volume increase (Fig. 9.1).

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  • Types of steel and steel making process

    2011-8-1 · Steelmaking process involves removal of unwanted nitrogen sulfur phosphorus or any impurities from raw iron (pig iron having 4 carbon) and the addition of alloying elements like chromium vanadium nickel cobalt etc. First raw material Iron ore Limestone dolomite dunnite and coking coal is added to the blast furnace from the top.

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  • Process for making iron or steel utilizing lithium

    For example an amount of auxiliary flux necessary to maintain a fluid slag in a process for making iron in which lime is the primary flux may range from about 0.25 to about 6 preferably from about 0.25 to about 2 by weight of the lithium containing material based on the weight of metal in the charge.

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  • (PDF) Management of Lime in SteelResearchGate

    2018-8-31 · The quality of lime controls the quality of steel refractory life and productivity. It also helps in removing the impurities during the steel-making process. Longer and inefficient storage of

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  • Influence of LD Slag on Iron Ore Sinter Properties and

    2011-2-9 · total steel making slag per day and in that LD slag is 2000 to 2500 t/day. This LD slag consists of 45.75 CaO 22.0 Fe and 8.22 MgO. Thus recycling of LD slag through the sintering process recovers lime iron and magnesia and thereby saving of flux material and iron ore

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  • Process for making iron or steel utilizing lithium

    For example an amount of auxiliary flux necessary to maintain a fluid slag in a process for making iron in which lime is the primary flux may range from about 0.25 to about 6 preferably from about 0.25 to about 2 by weight of the lithium containing material based on the weight of metal in the charge.

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  • Use of DRI and HBI in steel making plants

    2021-6-13 · Moreover it needs higher energy for the production due to the coke making and sintering processes. EAF has somehow larger emissions of greenhouse gas of produced metal compared to DRI mostly due to the use of electricity at the same time in the DRI process only natural gas is applied to reduce the iron ore. Emission of SO2 CO is not

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  • (PDF) Management of Lime in SteelResearchGate

    2018-8-31 · The quality of lime controls the quality of steel refractory life and productivity. It also helps in removing the impurities during the steel-making process. Longer and inefficient storage of

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  • SAFETY GUIDELINES FOR IRON STEEL SECTOR

    2019-12-13 · lime stone/ additives is added with iron ore fines for grinding in ball mill. 2.2.2 Pre-treatment process of additives Additives i.e. Lime stone dolomite coal/coke are required to be ground before mixing with iron ore fines. Un-like iron ore dry grinding process Lime stone/dolomite and coke are ground in ball mill/ roller mill together and

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  • Behavior of Cobalt in Iron- and Steel-making Processes

    to be high in serpentine and silica sand. In the iron ore the ratio of cobalt content to iron content varied from 1.5 to 6.5ppm depending on the brand. The mass balances of cobalt in the iron-making process are summarized in Fig. 1. Serpentine was identified to be the main source and it was followed by the ore and coke however the source

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  • (PDF) Management of Lime in SteelResearchGate

    2018-8-31 · The quality of lime controls the quality of steel refractory life and productivity. It also helps in removing the impurities during the steel-making process. Longer and inefficient storage of

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  • Behavior of Cobalt in Iron- and Steel-making Processes

    to be high in serpentine and silica sand. In the iron ore the ratio of cobalt content to iron content varied from 1.5 to 6.5ppm depending on the brand. The mass balances of cobalt in the iron-making process are summarized in Fig. 1. Serpentine was identified to be the main source and it was followed by the ore and coke however the source

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  • DolomiteIts Processing and Application in Iron and

    2017-6-28 · Dolomite is an anhydrous carbonate mineral. It is a double carbonate of calcium and magnesium (CaCO3.MgCO3). It is one of the important raw materials used in production of iron and steel. Dolomite contains theoretically 54.35 of CaCO3 and 45.65 of MgCO3 or 30.41 of CaO 21.86 of MgO and 47.73 of CO2.

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  • Effect of Mixing Pre-heated Water on Granulation and Iron

    2021-4-27 · Sintering is a process in which iron ore fines along with limestone dolomite coke fines lime gas cleaning plant (GCP) dust flue dust mill scale and return sinter are mixed with water to form nodules and then fired to form sinter .The sintering process commences with the downward propagation of combustion front and process completes when the combustion front reaches the bottom part of

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  • WO1994008055A1Iron making process using petroleum coke

    The invention provides a method for both disposing of an environmentally undesirable material comprising petroleum coke and the sulfur and heavy metals contained therein and of providing fuel for a process of making molten iron or steel preproducts and reduction gas in a melter gasifier having an upper fuel charging end a reduction gas discharging end a lower molten metal and slag collection

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  • Steelmaking Processan overview ScienceDirect Topics

    During the steelmaking process fluxes that consist of lime (CaO) or dolomitic lime with iron and scraps are charged to the furnace.There is a certain amount of free lime (f-CaO) in steel slag. Free lime with a specific gravity of 3.34 can react with water to produce Ca(OH) 2 with a specific gravity of 2.23 which results in volume increase (Fig. 9.1).

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  • Dolomite LimeHow Garden Lime Can Cause Problems

    2 days ago · Dolomite is recommended to correct calcium and magnesium deficiencies. Depending upon magnesium levels dolomitic lime can often cause more harm and trouble however than its initial cost. Excess magnesium is often associated with soil stickiness crusting compaction reduced aeration and releasing nitrogen from the soil pound for pound.

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  • Chemical Mineralogical and Metallurgical

    2017-12-21 · The smaller sized iron ore fines (<100 mesh) shall reduce the permeability of sinter bed and this in turn will generate more sinter return-fines and thus productivity of sinter machine is affected. So the ideal size distribution of iron ore fines must be 10 to 0.15 mm and mean size of the ore

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  • Data based modeling approach of iron and steelmaking

    2013-12-4 · The main raw materials of the process include main materials (such as hot metal scrap pig iron) and sub-material (oxygen iron ore lime dolomite and etc.) and the product is the steel bath of which the temperature and composition are required to hit the tapping aim window. Need for process control in a BOF steel making furnace

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  • Influence of LD Slag on Iron Ore Sinter Properties and

    2011-2-9 · total steel making slag per day and in that LD slag is 2000 to 2500 t/day. This LD slag consists of 45.75 CaO 22.0 Fe and 8.22 MgO. Thus recycling of LD slag through the sintering process recovers lime iron and magnesia and thereby saving of flux material and iron ore

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  • IRON AND STEEL INDUSTRYCALCINOR. Minerales

    Calcinor supplies the products necessary for success in the steel and iron making process such as quick-lime calcined dolomite and refractory materials. To obtain steel the base is iron ore or scrap metals. In both cases Calcinor products are necessary to process and obtain the final raw steel with the desired composition. Committed to innovating the

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  • Effect of limestone and dolomite flux on the quality of

    2021-2-1 · The effect of flux (dolomite and limestone) was studied in the pelletization process using the feed materials i.e. goethetic-hematite iron ore fines and anthracite coal. The experiments were carried out using individual flux or different combination of fluxes.

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  • Types of steel and steel making process

    2011-8-1 · Steelmaking process involves removal of unwanted nitrogen sulfur phosphorus or any impurities from raw iron (pig iron having 4 carbon) and the addition of alloying elements like chromium vanadium nickel cobalt etc. First raw material Iron ore Limestone dolomite dunnite and coking coal is added to the blast furnace from the top.

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  • OPEN HEARTH PROCESS

    2014-10-24 · In the basic process dolomite and magnesite bricks are used. In the basic open hearth process the charging starts with iron ore scrap limestone sponge iron and molten pig iron. The charge is heated and hot molten pig iron is poured into the furnace. The refining starts after charging is completely melted away.

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  • Data based modeling approach of iron and steelmaking

    2013-12-4 · The main raw materials of the process include main materials (such as hot metal scrap pig iron) and sub-material (oxygen iron ore lime dolomite and etc.) and the product is the steel bath of which the temperature and composition are required to hit the tapping aim window. Need for process control in a BOF steel making furnace

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