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Apr 30, 2020 EAF steelmakers most likely will operate more along the lines of a BOF process using some form of preprocessed iron ore. This is why raw material suppliers, including the likes of Cleveland-Cliffs Inc. in the U.S., are building capacity to supply the anticipated need.
There are basically two routes for the production of steel. In the Blast Furnace route BF pig iron is extracted from iron ore using coke. Slag and blast furnace gas are formed in the blast furnace. The slag is used for paving and ballast in civil engineering works and the gas for generating electricity. The iron from the blast furnace is then further refined and converted to steel
the integrated steelmaking process featuring the blast furnacebasic oxygen furnace BFBOF, where iron ore is the major source of iron units and electric steelmaking based on the electric arc furnace EAF, where steel scrap or direct reduced iron DRI are the major iron feedstock materials. Figure 1 major steelmaking process routes.
production. It is produced by recycling steel in an EAF. The main inputs are recycled steel and electricity. Depending on the plant configuration and availability of recycled steel, other sources of metallic iron such as direct-reduced iron DRI or hot metal can also be used in the EAF route. The main co-products produced during iron and crude steel production are slags 90 by
the production process of ... Quality of steel produced in electric arc furnace is lower than ... reducing agent to produce direct reduced iron DRI. The use of BF
May 08, 2013 DRI is the product which is produced by the direct reduction of iron ore or other iron bearing materials in the solid state by using non-coking coal or natural gas. Processes which produce DRI by reduction of iron ore below the melting point of the iron are normally known as the direct reduction processes.
process include both alternative steel production routes such as the integrated DRIscrapEAF mode and also alternative hot metal processes. These DRI and alternative hot metal processes will be listed with comments as to their future success. INTRODUCTION The blast furnace today continues as the primary production method of hot metal in large-
arc-furnace EAF processes. This rapid increase in crude steel production has also resulted in significant increases, as shown in Fig. 3, in the prices of iron ore and coking coal, the principal raw materials of iron and steel.3 There are some background factors e.g., i the current BF process relies heavily on high-grade ore mined in
EAF - E lectric A rc F urnace for steel making is a rapid growing technology competing with the BFBOF Major feedstock is scrap steel The purity of existing scrap steel is declining and needs virgin iron added to dilute the tramp elements such as copper and zinc to improve final product quality DRI D irect R educed I
When paired with an EAF, the existing long-established Midrex technology already results in lower CO2 emissions than the BFBOF route to steelmaking at 1.1-1.2 kg CO2 per kg of steel, compared with 1.6-2.0 kg CO2 per kg of steel, respectively, Midrex notes.
Dec 23, 2020 The process is among several initiatives which use an H2-DR EAF setup, combining the direct reduction of iron ore by use of H2 with an EAF for further processing into steel. The product from the H2-DR process is DRI or sponge iron, which is fed into an EAF, blended with suitable shares of scrap, and further processed into steel.
fuel, natural gas, which has generally made DRI more expensive than iron made by the COBF process. Worldwide, up to 70 percent of steel is made via blast furnacebasic oxygen furnace BFBOF, which uses feed materials of up to 25 percent scrap. Most of the remaining 30 percent of global steel production is made via electric arc furnace
However, the direct reduced ironelectric arc furnace DRIEAF route is a better option for North Africa and the Middle East-North Africa MENA region. What makes the DRIEAF combination attractive when compared to traditional BFBOF steel production Value-added use of associated natural gas Capacity sized to market needs
Direct Reduced Iron DRIEAF route, based on iron ore and often scrap for the iron input. Energy intensity of DRI production can be lower than BF route, depending on the size and fuel and ore characteristics. The main steelmaking processes will be analysed in the next paragraphs.
For the BF-BOF route these are predominantly iron ore, coal, and recycled steel, while the EAF route produces steel using mainly recycled steel and electricity. Depending on the plant configuration and availability of recycled steel, other sources of metallic iron such as direct-reduced iron DRI or hot metal can also be used in the EAF route.
Direct Reduced Iron DRI, also known as Sponge Iron, offers an alternative steel production route to BF-BOF and Scrap-EAF routes. In DRI, iron ore is reduced in its solid state unlike BF process where a liquid metal is formed during reduction. DRI can then be transformed to steel in electric arc furnaces. DRI production is common in Middle East, South America, India and
Direct reduced iron DRI process. In addition to the process route via the blast furnace process, there is another option for extracting crude steel from iron ores using the so-called direct reduced iron DRI process secondary route.The starting point for the efforts to find an alternative to the blast furnace process was the relatively high process expenditure.
The use of EAFs has expanded and now accounts for nearly 23 of steel production in the United States. The EAF is different from the blast furnace as it produces steel by using an electrical current to melt scrap steel andor direct reduced iron. The EAF uses scrap steel and electricity to produce molten steel.
Calculate the production cost of DRI for 7 individual pellet types and 1 commercially used mix 135 using the BF pellet price 144.65 cu 163.45 EUR cu. Calculate the production cost for 100 ton liquid steel in EAF assuming an MgO saturated slag using the optimization tool RAWMATMIX . Compare production costs with mix
DRI production Direct reduction of iron is the removal of oxygen from iron ore or other iron bearing materials in the solid state, i.e. without melting, as in the blast furnace. The reducing agents are carbon monoxide and hydrogen, coming from reformed natural gas, syngas or coal.
Steelmaking based on direct reduced iron DRI, and its compacted derivative hot briquetted iron, HBI is an anticipated important global alternative to current steel production based on FeOx reduction in blast furnaces due to its lower specific CO2 emission. The majority of DRI is melted and refined in the electric arc furnace with different process conditions compared to the melting of steel ...
Nov 23, 2020 Steel is manufactured by two main process routes 1 the integrated steelmaking process featuring the blast furnacebasic oxygen furnace BFBOF, where iron ore is the major source of iron units and 2 electric steelmaking based on the electric arc furnace EAF, where steel scrap or direct reduced iron DRI are the major iron feedstock materials.
steel can be processed through refining, casting, rolling, etc. to produce the final steel products. Figure 1-2 DRIEAF Process for Steel Production In addition to the BFBOF and DRIEAF processes, there also exist open hearth furnaces OHF and induction furnaces IF. OHFs makeup less than 2 of overall steel production and are considered an
There is also a shift from production via the Blast Furnace to the Electric Arc Furnace in other parts of Europe, as increasing amounts of scrap are returned to the steel industry. So in Europe BF and EAF currently have an equal share of the market, and in China this stage is expected to be reached by 2020.
At JSPL Angul site the DRI BF- Electric Arc Furnace route has been adopted for steel making. The hurdle of non-availability of natural gas at Angul site was overcome by an innovation. A Coal to Gas Plant was set up at Angul.
DRI, or its compacted form hot briquetted iron HBI, is a versatile feedstock that can be utilised in the BF or BOF to boost productivity, lower fuel rates or replace scrap in the EAF to dilute impurities from steel scrap to enable the production of higher quality end products.
May 08, 2013 Fig 1 Typical melting profile with DRI in the charge mix in a 150 ton EAF. The normal advantages associated with the use of DRI in the EAF steelmaking process are i constant size and dimension, ii known composition, iii almost absence of tramp elements, iv purity, or the absence of non-metallic substances leading to better productivity and energy consumption, v easy use in the EAF ...
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