Mass and energy balances of stainless steel. T 1 , T 2 denote the gas temperatures at the inlet and at the outlet of each element of. ISIJ International 44 , p. Trade association for retail and goods logistics, Mannheim Germany , member no. H 2 shows oxygen deficient operati on of the EAF.
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Author content All content in this area was uploaded by Marcus Kirschen. Measured and calculated off-gas temperatures in primary dedusting duct. Content uploaded by Marcus Kirschen. Author content All content in this area was uploaded by Marcus Kirschen on May 17, New Developments in Metallurgical Process Technology 1.
Modeling and optimization of EAF dedusting system. Wahlers 2. In particular, post-. In addition, a comput er program was developed to si mulate the gas and enthalpy. The va lidity of mathematical model was verified. This simu lation program allows the. EAF plants. Results of measurem ents and simulations are presented. In the same year, the share of the EAF steel produc tion in the European.
Other dust emissions through electrode. Direct off-gas exhausting increases the air ingress in the furnace through different. The air is used for partial post-. Desp ite of post-combustion inside. Remaining CO and H 2 have to be post-combusted before cooling below. Frequently, the drop-out box is used as post-combustion chamber before the off-.
Due to widely varying off-gas. For optimal adjustment and operation of the entire dedusting plant the following. Off-gas measurements in the primary exhausting duct are difficult due to high gas. The adjustment of the exhausting system is often. New Developments in Metallurgical Process Technology 2. Figure 1: Schematic diagram of exhausting at arc furnaces. The off-gas sample is taken through a water c ooled lance, that is installed between the.
EAF elbow and the primary exhausting duct. The position of the sampling lance. Off-gas temperature. The off-gas enthalpy is calculated on. EAF elbow. Measured off-gas ent halpy and infiltrated air volume flow provide information. Figure 2: Equipment of off-gas measurements. Off-gas composition, temperat ure and volume flow rate of the post combusted off-gases.
The unknown air volume flow ra te at the gap between EAF elbow and primary. New Developments in Metallurgical Process Technology 3. The measured off-gas composition over charge ti me of EAF 1 is shown in Fig. The scrap is charged with two bu ckets into the furnace. The presence of CO and.
H 2 shows oxygen deficient operati on of the EAF. Oxygen is lanced into the melt after. The added coal is burned with oxygen to fo rm the foam slag. This operation results in strong emission of CO, that is partially combusted to CO 2 in the. H 2 O calc. Figure 3: Measured off-gas composition at the elbow of EAF 1 versus charge time. Nevertheless, duri ng the oxygen lancing, the m easured off-gas composition is.
N 2 concentrations during the melti ng period are reduced with sealed EAF. The varying off- gas compositions lead to str ong variations of the off-gas. However, the tem peratures before filter have to. Temperature decr ease is reached by mixing with secondary.
The operation parameters of dedusting plants are. A simulation tool of the dedusting plant units is developed in. Modules of the simulation program are similar to basic units of dedusting plants Fig. The dedusting plant of an EAF consists of water-cooled hot gas ducts, drop out box, post.
The simulation. The calculation of. New Developments in Metallurgical Process Technology 4. Fan Reverse. Post-combustion of CO and H 2. Figure 5: Modeling of the heat transfer from off-gas to the cooling water. The gas flow regime is turbulent; the mixi ng of gas components is assumed to be ideal,.
New Developments in Metallurgical Process Technology 5. T 1 , T 2 denote the gas temperatures at the inlet and at the outlet of each element of. A is the surf ace of the element. The heat transfer from. The Nusselt.
This requires you to deactivate the Java Script function in your browser. In particular, you have the right to information on your personal data processed by us, their processing purpose, the categories of the processed personal data, the recipients or categories of recipients to which your data have been disclosed or will be disclosed, the planned storage period or the criteria for the determination of the storage period, the existence of a right to rectification, erasure, restriction of processing, objection against processing, complaint with a supervisory authority, the origin of your data if they have not been collected by us, the existence of an automated decision making including profiling and, where applicable, meaningful information on the involved logic and the implication concerning you and the pursued effects of such a processing, as well as your right to notification, which guarantees there are according to art. Wahler s: In this work, gas flow patterns of the off-gas post combustion in three different dedusting system units were simulated with a computational fluid dynamics CFD code: Additional information and contacts. EAF, 7 th Europ. The increase of the air-tightening of the furnace is advantageous because, with the reduction of the amount of uncontrolled air that enters the furnace, it is possible to have better control of the CO post-combustion in some zones of the furnace that are useful for chemical energy recovery.
EAF elbow. H 2 shows oxygen deficient operati on of the EAF. Figures - uploaded by Marcus Kirschen. EAF elbow and the primary exhausting duct. New Developments in Metallurgical Process Technology 4.