Influence of Parameters on the Pre-Reduction Process of …
The high-temperature interactions between vanadium-titanium magnetite carbon composite hot briquettes (VTM-CCBs) and pellets were systematically investigated under simulated blast furnace ...
Rotary Kilns
FEECO is a leading manufacturer of highly engineered, custom rotary kilns for processing solids. Our high-temperature kilns have earned a reputation for their durability, efficiency, and longevity. ... An indirect-fired kiln is enclosed in a furnace, which is then externally heated. The material is heated via contact with the kiln shell.
NOx Emission Reduction by Advanced Reburning in …
pellets can increase production, save coke, improve technical and economic indexes of ironmaking, reduce hot metal cost and improve economic benefits …
High-chromium vanadium–titanium magnetite all-pellet …
Semantic Scholar extracted view of "High-chromium vanadium–titanium magnetite all-pellet integrated burden optimization and softening–melting behavior based on flux pellets" by Bojian Chen et al. ... The high-pellet operation of the blast furnace ironmaking process is a feasible method for utilization of the High-chromium … Expand. 6.
Preparing high-strength titanium pellets for ironmaking as …
In this investigation, the roasting characteristics of ilmenite concentrate pellets were systematically investigated, with its purpose to prepare high-strength …
A Novel Process for Direct Reduction of Titanium …
The titanium concentrate pellets obtained after reduction in a gas-based shaft furnace are melted and separated in a high-frequency induction furnace, and the …
Effect of Humic Acid Binder on Oxidation Roasting of Vanadium–Titanium
The oxidation roasting of vanadium–titanium magnetite (VTM) pellets with a new composite binder was investigated using a pilot-scale straight-grate. The evolution of the chemical and phase composition, the compressive strength, and the metallurgical properties of the fired VTM pellets were investigated. Under a preheating …
Reduction Process of Pellet Containing High Chromic Vanadium–Titanium
In the present study, the reduction process of pellet containing high chromic vanadium–titanium magnetite in cohesive zone has been investigated. To elucidate the reduction process including the softening and melting properties, structure changes and migration processes of valuable components (Fe, V, Ti, and Cr) in pellet containing …
Research on Mechanism of Ring Formation in Grate-Kiln of …
In the experiment of ring formation in the acid pellet gas heated rotary kiln, the kiln was divided into three parts, the head of kiln, the middle of kiln and the tail of kiln …
Iron Ore Pellets: North America, BF and DR Grade, …
shaft furnaces: pellets, lump ore key physical properties are size consist, mechanical strength: economic importance (a) yield of pellet, lump ore converted to DRI (b) performance of the shaft reduction furnace unlike blast furnace, pellets (and lump ore) are only solid materials and so determine
Behavior of Silicon During Reduction and Smelting of …
Abstract The behavior of silicon during smelting of vanadium titanomagnetite metallized pellets in an electric furnace has been investigated thermodynamically and experimentally. Thermodynamic calculations indicated that the activities of free oxygen ion and silicate increase with increasing CaO and MgO content in the titanium slag, whereas silica …
Preparing high-quality vanadium titano-magnetite pellets …
The oxidation behaviour and the phase and microstructure evolution of VTM (vanadium titano-magnetite) pellets were studied during thermal processing in order to optimise the production method for producing high-quality pellets. The oxidation tests showed that titanium magnetite and ilmenite in VTM began to oxidise at 500°C and …
Preparing high-strength titanium pellets for ironmaking as furnace …
The temperature condition of grate-kiln production process was simulated in this research. Generally, the pellets with compressive strength > 400 N/P can meet the requirement of follow-up kiln process. ... High titanium protecting pellet for furnace and its preparation method, Chinese patent, 200810304188.3, 2009. (In Chinese). Google …
CN1557976A
The furnace protecting oxide pellet is produced through grinding and mixing V-Ti concentrate and coarse concentrated titanium ore into material containing iron in 52-55 wt% and titania 17-20 wt%, mixing with bentonite as adhesive, stoving at 400-500 deg.c, making raw oxide pellet in a disc pellet making machine, roasting at 1200-1250 deg.c …
Optimizing pre-reduction of vanadium–titanium magnetite …
Furthermore, the introduction of half of the tail gas of the rotary kiln into the top gas of the melting furnace increases the metallization rate of VTM pellets from 37.84% to 57.2%. These findings provide valuable references for utilizing the high-temperature top gas of the melting furnace for VTM pre-reduction in rotary kilns.
Effect of titanium on the sticking of pellets based on …
Direct reduction based on hydrogen metallurgical gas-based shaft furnace is a promising technology for the efficient and low-carbon smelting of vanadium–titanium magnetite. However, in this process, the sticking of pellets occurs due to the aggregation of metallic iron between the contact surfaces of adjacent pellets and has a serious …
Heat Transfer Conditions in Hydrogen-Fired Rotary Kilns for …
This work analyzes the heat transfer conditions in a rotary kiln used for the heat treatment of iron ore pellets in the grate-kiln process. The analysis concerns …
Research on Mechanism of Ring Formation in Grate-Kiln …
Formation in Grate-Kiln of Titanium-Containing Pellets Haoyu Cai, Zhang, Zhengjian Liu, Gele Qing and Yan Zhang Abstract The growth rate of ring formation increased when titanium-containing powder had been added into Shougang grate-kiln to produce titanium-containing pellets, which had a strong impact on the production …
Kinetics and mechanism of coal-based direct reduction of high …
High-chromium vanadium–titanium magnetite (HCVTM) is a valuable resource containing metal elements such as iron, vanadium, titanium, and chromium. To recycle these elements, direct reduction is an efficient way. The mechanism and reaction kinetic parameters for the direct reduction of HCVTM were studied. Experimental results …
Reduction kinetics and mechanism of pellets prepared from high …
Non-isothermal reduction kinetics and mechanism of high chromium vanadium-titanium magnetite pellets were studied at 400-1100 degrees C, simulating the lumpy zone of blast furnace conditions.
Smelting Reduction Characteristics and Mechanism of Vanadium–Titanium
Vanadium–titanium magnetite is one kind of important strategic resources. However, there exist some common problems in the current smelting process of vanadium–titanium magnetite. In the present paper, we propose the rotary kiln pre-reduction and bath smelting process reasonably for smelting vanadium–titanium …
High-Efficiency Smelting Separation of Vanadium–Titanium …
Efficient utilization of vanadium–titanium magnetite can be achieved by high-temperature pyrometallurgical smelting separation of the material. The fusibility of vanadium–titanium magnetite during reduction and smelting reflects the difficulty of smelting separation. In this study, the direct reduction of iron obtained from the …
Effect of the increasing percent of high chromium vanadium-titanium …
The reduction of high-chromium vanadium-titanium magnetite as a typical titanomagnetite containing 0.95wt% V2O5 and 0.61wt% Cr2O3 by H2-CO-CO2 gas mixtures was investigated from 1223 to 1373 K.
Effect of titanium on the sticking of pellets based on …
Direct reduction based on hydrogen metallurgical gas-based shaft furnace is a promising technology for the efficient and low-carbon smelting of …
Effect of high-pressure grinding rolls pretreatment on the …
DOI: 10.1016/j.jmrt.2023.01.125 Corpus ID: 256264154; Effect of high-pressure grinding rolls pretreatment on the preparation of vanadium titanium magnetite pellets @article{Guo2023EffectOH, title={Effect of high-pressure grinding rolls pretreatment on the preparation of vanadium titanium magnetite pellets}, author={Yu-Feng Guo and Kuo …
Effect of Humic Acid Binder on Oxidation Roasting of …
Pellet production by direct reduction has been achieved using this composite humic acid-based binder. However, it has not yet been used in the industrial production of oxidized pellets. Both straight-grate and grate-kiln furnaces are widely used in oxidized pellet produc-tion [12]. Grate-kiln furnaces consist of three separate machines linked ...
Particle motion simulation and pulverized coal injection
The production process of direct reduced iron from titanomagnetite by coal reduction in air in rotary kiln is a key step in the extraction of titanium and iron. This process is conducive to alleviating the stocking problem of a large amount of Ti-bearing blast furnace slag. The relationships between particle movement and pulverized coal …
Smelting Reduction Characteristics and Mechanism of …
8–15 mm. Then, the pellets are charged into rotary kiln from its charge end. The carbon-bearing pellet of vana-dium–titanium magnetite is reduced to metallic iron (Fe) gradually at the temperature of 1000–1300 C in rotary kiln. The pellets with a certain metallization rate are charged into the pure oxygen bath smelting furnace directly
Degradation mechanism of high alumina refractory bricks by reaction
1. Introduction. Iron ore pellet is one of the critical burdens for the blast furnace process [1, 2].Owing to the increasing steel demand, iron ore pellets production has significantly expanded in recent years [3, 4].There are three main processes to produce iron ore pellets, including the grate-kiln process, the shaft furnace process, and the …
Optimizing pre-reduction of vanadium–titanium magnetite …
In this study, the pre-reduction impact of CO and H2 on vanadium–titanium magnetite (VTM) was examined considering the composition of the top gas of the melting furnace. Additionally, the recycled and upgraded tail gas from the rotary kiln was mixed with the top gas of the melting furnace to enhance the pre-reduction effect and meet the …