straight grate induration process for iron ore pelletizing

A Mathematical Model for Straight-Grate Iron Oxide Pellet …

Iron ore pellet making process involves balling of green mix (containing iron ore fines, binder, limestone and coke) using rotating disk or drum to produce green …

Dynamic simulation of pellet induration process in straight-grate …

The latter process that was primarily developed by Lurgi and is currently owned by OutoKumpu Technology, accounts for two thirds of the world's installed pelletizing processes capacity. This study is focused on simulation of pellet induration process in the straight-grate system. Fig. 1 depicts schematic of a typical straight …

Induration of Indian Low Grade Iron Ore Pellets in a Pilot …

Iron ore concentrate of average size less than 100 µm was generated through beneficiation of goethite ore of Bolani iron ore mines. Green pellets of size 9–16 mm were produced in a laboratory disc pelletiser of 1 m diameter using the ore fines of minimum blaine value i.e. degree of fineness of the iron ore of 2000 cm 2 /g with 0.6% …

Traveling grate pelletizing

Traveling grate pelletizing Outotec Traveling Grate Pelletizing is the industry's leading induration technology for iron ore pellet processing and is designed for a wide range of plant capacities up to 9.25 million t/a. Based on over 60 years' experience and world-class R&D, our process produces

Mathematical model for a straight grate iron ore pellet …

Two types of systems are usually used for induration of the iron-ore pellets: (a) straight-grate and (b) grate-kiln process. A hearth layer of fired pellets is used in …

Dynamic simulation of pellet induration process in …

The production of iron ore pellets involves two major steps, forming the "green" pellets in rotary disks or drums, followed by their heat hardening them subsequently at elevated …

Failure Analysis and Improvement Measures of Grate Bars Used in Iron

Iron ore pelletizing is a process in which powdered iron ore along with a certain amount of fluxing materials (5-10%), binder (0.4-0.8%) and solid carbonaceous fuel (such as anthracite coal or coke breeze) are rolled into the spherical bodies having a diameter of 6-16 mm in size (Ref 1).These spherical bodies are then thermally hardened …

Development and validation of a mathematical model for the moving grate

DOI: 10.1016/0301-7516(79)90031-0 Corpus ID: 98573752; Development and validation of a mathematical model for the moving grate induration of iron ore pellets @article{Thurlby1979DevelopmentAV, title={Development and validation of a mathematical model for the moving grate induration of iron ore pellets}, author={J. A. Thurlby and …

Optimizing the Operation of Straight-Grate Iron-Ore …

There are two predominant forms of the iron-ore pellet second phase of drying (to complement the route of the induration process. The straight-grate process is as indicated primary gas stream). As the primary gas stream leaves the previously. To protect grate bars (upon which the pellets are laid), a hearth layer of fired pellets is used.

An integrated optimal control model for the drying and …

The drying and preheating process plays a crucial role in the induration of iron ore pellets. It is conducted on a closed, moving bed in both the straight grate and …

Optimizing the operation of straight-grate iron-ore pellet induration

Mathematical models of straight-grate pellet induration processes have been developed and carefully validated by a number of workers over the past two decades. However, the subsequent exploitation of these models in process optimization is less clear, but obviously requires a sound understanding of how the key factors control the operation. In this …

Iron Ore Pelletizing Process: An Overview | IntechOpen

The most widely used industrial processes for pellet induration are the straight grate and the grate-kiln. The straight grate process is composed of a single furnace where an endless line of pallet cars moves.

Pelletizing Technology

The building footprint of the induration furnace is significantly smaller compared with the straight grate process, which means that the world's most compact pelletizing plant – with its low building profile, short process air ducts, and standardized equipment - allows the cost of iron production to be slashed.

Modeling and simulation of iron ore pellet drying and induration …

ABSTRACT As key parameters of modeling iron ore pellet drying and induration process, the properties of a packing bed are calculated by our proposed method. Derived from realistic spheres-dropping phenomena, the dropping and rolling rules make the moving sphere finally reach its minimum gravitational potential energy. Furthermore, the plastic …

A Mathematical Model for Straight-Grate Iron Oxide Pellet Induration

Straight grate furnaces are widely used for induration of hematite pellets where typically 1%–2% carbon is added to the green mix to help in generating heat by combustion.

Novel Methodology of Modeling Iron Ore Induration …

Pelletizing is a process of agglomerating iron ore fines into hardened pellets. These fines are initially combined with binding ... Green pellets are loaded onto the hearth layer to form a packed bed of pellets. Straight grate induration machines are typically designed such that pellets pass through updraft-drying (UDD), downdraft-drying (DDD),

Experimental and numerical investigation of iron ore pellet …

In order to numerically analyze the iron ore pellet induration process, a packed bed model based on coupled CFD-DEM method was presented in this study. ... Mathematical model for a straight grate iron ore pellet induration process of industrial scale. Computational Materials Science, 44 (2) (2008), pp. 296-302. View PDF View …

Mechanism of magnetite iron ore concentrate morphology …

The induration process using straight-grate, grate-kiln, and vertical shaft kiln systems can be divided into four different stages drying, preheating, firing, and cooling [10], [11]. During the induration process of magnetite iron ore pellets, the magnetite phase converts to hematite, as shown in Eq. (1) [12], [13].

IRON ORE PELLETIZING PROCESS

Figure 3. Schematic diagram of the straight grate induration process /straight grate pelletizing process (Mourão et al., 2013).

Mathematical model for a straight grate iron ore pellet induration

Limonite pellets, primarily composed of Fe 2 O 3 ·nH 2 O, are a crucial raw material for modern iron-making techniques. In order to produce high-quality pellets, a pre-drying and roasting process is necessary. This is because wet pellets can absorb heat during the water evaporation process, which can lead to uneven temperature …

A Mathematical Model for Straight-Grate Iron Oxide Pellet Induration

In this work, a mathematical model for the straight-grate pellet induration furnace is presented. The induration furnace is an equipment used for the efficient heat and mass transfer between the pellet bed and the flowing gas. ... "Iron ore pelletizing process: An overview," Iron Ores and Iron Oxide Materials (2018) P. Satyananda, A. …

Mathematical model for a straight grate iron ore pellet induration

a b s t r a c t A mathematical model is developed for induration of the iron-ore pellets in an industrial-scale plant based on the laws of mass, heat and momentum transfer.

Computational Materials Science

Two types of systems are usually used for induration of the iron-ore pellets: (a) straight-grate and (b) grate-kiln process. A hearth layer of fired pellets is used in the former to …

Schematic diagram of the straight grate induration process [29].

In an iron ore pelletization plant, pellets are produced inside a rotating disc pelletizer. Online pellet size distribution is an important performance indicator of the pelletization process.

Optimization of Induration Cycle for Magnetite Concentrate …

Production of iron oxide pellets from iron ore fines involves several steps from drying to induration . The schematic diagram of the straight grate induration process is shown in Fig. 1. The corresponding operating parameters of the induration machine and pellet properties are shown in Table 1.

Drying and preheating processes of iron ore pellets in a traveling grate

A mathematical model of drying and preheating processes in a traveling grate was presented based on the laws of mass, momentum, heat transfer, and drying semiempirical relations. A field test was systematically carried out in a traveling grate. The effects of pellet diameter, moisture, grate velocity, and inlet gas temperature on the …

NextGen Pelletizing™

Outotec Traveling Grate Pelletizing The traveling grate indurating process is responsible for two-thirds of the world's installed pelletizing capacity. Outotec offers the industry's leading induration technology for iron ore pellet processing, which is based on over 60 years of experience and world-class R&D. This process ...

Iron ore sintering and pellet induration processes

Semantic Scholar extracted view of "Iron ore sintering and pellet induration processes" by J. R. Wynnyckyj et al. ... Successive approximate model based multi-objective optimization for an industrial straight grate iron ore induration process using evolutionary algorithm. K. Mitra Sushanta Majumder. Engineering, Computer Science.

Optimization of Pellet Plant Straight Grate Induration …

pellets [6]. In the straight grate induration process, the green pel-lets are subjected to different zones like drying, preheat-ing, firing, and cooling. In general, the high alumina pel-lets are associated with high LOI. The presence of high LOI in the final concentrate deteriorates the quality of the pellets [7].

Development and Evaluation of a Furnace for Lab-scale Pellet Induration …

Straight Grate Process. abm Week. 2018. ... Induration of magnetite iron ore pellets liberates considerable amounts of heat when magnetite is oxidised to hematite. Elevated oxygen levels in the ...