straight grate induration process for iron ore pelletizing

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 …Web

Dynamic simulation of pellet induration process in straight-grate

The induration process in travelling grate typically consists of four distinct phases: drying, preheating, firing, and cooling. The first stage of drying is updraft to …Web

Mathematical model for a straight grate iron ore pellet induration

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 protect grate bars from excessive heating. Fresh pellets are charged onto a hearth layer of the fired ones.Web

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 …Web

Development and application of thermal mathematical model of iron ore

Based on the analysis of heat transfer mechanics, physical and chemical change of pellet drying and preheating process in grate, the mathematical model is established and solved by three-diagonal matrix algorithm. With Visual Basic 6.0 a simulation software is developed. The model is verified by measurements at a domestic …Web

The Coupling Effect in Drying Section in Traveling Grate: a CFD …

Iron ore pellets are currently one of the main ingredients in iron-making processes with the output increasing over the years [1, 2].Due to the large capacity and the better thermal efficiency by recycling use of hot waste gas, grate-kiln is a widely used process for iron ore pellet production [3, 4].In a typical grate-kiln-cooler pellet …Web

Optimization of Pellet Plant Straight Grate Induration

Indian iron ores are suffering from high amounts of alumina and loss on ignition (LOI), which are deleterious constituents in both the pelletizing as well as iron making processes. Iron ore fines utilized in pellet making consist of alumina in the range of 3.20–3.35% and LOI in the range of 3.50–3.70%. Detailed palletization studies have …Web

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 …Web

Iron ore sintering and pellet induration processes

Modeling and simulation of iron ore pellet drying and induration process with accurate bed void fraction calculation. 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….Web

(PDF) Iron Ore Pelletizing Process: An Overview

In this work, a mathematical model for the straight-grate pellet induration furnace is presented. The induration furnace is an …Web

Study of the induration phenomena in single pellet to traveling …

The process for pelletizing iron ore fines is an important operation unit for producing high quality of raw materials for the subsequent reduction processes such as …Web

Pelletization Solutions

Pelletizing is the process of transforming iron ore fines into spherical pellets through agglomeration and induration to be used as feed to a blast furnace or direct reduction …Web

Iron Ore Pellets and Pelletization Process – IspatGuru

Pelletizing of iron ore was started in the 1950s to facilitate the utilization of finely ground iron ore concentrates in steel production. For the pelletizing of iron ore there are two main types of processes namely, the straight travelling grate (STG) process and the grate kiln (GK) process. In the STG process, a stationary bed of pellets is ...Web

Influence of Pellet Basicity (CaO/SiO2) on Iron Ore Pellet …

Figure 1shows the schematic diagram of the iron ore pel-letization process. Figure 2schematically shows the induration process in a straight grate machine. The green pellets, after sizing through a roller conveyor, are discharged onto the travelling grate induration machine on top of the hearth layer and be-tween the side layers of the fired ...Web

Pelletization

In Grate-Kiln process, green pellets are fed on oil or gas-fired endless Straight Grate machine where they are dried and preheated. The preheated pellets are then fed to a rotary kiln where their temperature is raised in oxidizing atmosphere to 1290–1400 °C. In induration, ore grains are sintered together with oxidation and slag …Web

Mathematical models and expert system for grate-kiln process of iron

BARATI M. Dynamic simulation of pellet induration process in straight-grate system [J]. International Journal of Mineral Processing, 2008, 89(1/4): 30–39. Article Google Scholar SADRNEZHAAD S K, FERDOWSI A, PAYAB H. Mathematical model for a straight grate iron ore pellet induration process of industrial scale [J].Web

Schematic of the straight grate pelletizing process.

Figure 1. Schematic of the two principle pelletizing processes: (a) straight grate pelletizing process (Mourão, 2012); (b) grate-kiln pelletizing process (, 2012) Currently, the existing ...Web

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. Revamp of pelletizing plantsWeb

Traveling grate pelletizing

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 uniform pellets with excellent physical and ...Web

Pelletizing for Direct Reduction and Electric Steelmaking

A passion for pelletizing and consideration of the entire process chain from start to finish are fundamental to innovative pelletizing-plant solutions. Raw-material testing, mathematical simulation, 3D planning, and process automation are key elements Primetals Technologies brings with its passion for innovation to the iron and steel industry.Web

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].Web

Study of the induration phenomena in single pellet to traveling grate

The process for pelletizing iron ore fines is an important operation unit for producing high quality of raw materials for the subsequent reduction processes such as blast furnace or direct reduction. The process essentially involves production of green pellets and induration on a traveling grate furnace to promote inner partial melt and ...Web

Usage of High-LOI Iron Ore Fines in Pellet Making

Loss on ignition (LOI) in the mineral represents the chemically bonded water which can be removed at high temperatures only. High LOI in iron ore fines has an adverse affect during pellet induration process. High-LOI iron ore fines are required for detailed laboratory pelletization studies and are used in pellet making. The received iron ore is …Web

Convective drying of an individual iron ore pellet

The induration process generally consists of four stages; drying zones (UDD, DDD), pre-heat zone (PH), firing zone (F) and cooling zones (C1, C2), as displayed in Fig. 1 where a schematic picture of a straight grate furnace is presented. Throughout the drying zone, balled pellets made from a mixture of iron ore, binders and water are ...Web

Understanding Pellets and Pellet Plant Operations – …

Iron ore pellets can be made from beneficiated or run of mine iron ore fines. ... Induration process. The firing of pellets establishes the binding of hematite particles at an elevated temperature ranging from …Web

The grate-kiln induration machine

Iron ore pellets are a preferred feedstock for ironmaking. One method used for pelletizing is the grate-kiln process, first established in 1960. During the past decade, the establishment of new grate-kiln plants has increased …Web

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 …Web

Mathematical model for a straight grate iron ore pellet induration

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 …Web

Dynamic simulation of pellet induration process in straight …

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 …Web

GUIDELINES FOR SELECTING PELLET PLANT

Key Words: Iron ore pelletizing; Induration; Straight grate; Grate-kiln; Pellet plant capacity. 1 Technical contribution to the 6 th International Congress on the Science and Technology ofWeb