Keywords: Tunnel Kiln, Iron ore-coal composite pellets, Sponge iron, Thermal efficiency, Carbon utilization efficiency, Percentage metallic iron . 1. INTRODUCTION The tunnel kilns are mostly used by the ceramic industries for heating refractory and ceramic products [1-2]. In the year 1908 use of tunnel kiln started for iron oxide reduction. ThisTunnel kiln is fired with producer gas from coal gasification. Reduction temp. is 1140 -1200 degree and reduction time -42 hours. Sponge iron produced from staggers is in briquette from for further end use. Any removal of impurities in above sponge iron could be carried out by Magnetic separation.

Process Of Iron Reduction In Tunel Kin And Rotary Kiln. Sponge iron production by tunnel kiln method was developed from 1911 as H246gan228s method in Sweden After many …The major raw material required for the Sponge Iron plant is Iron Ore, Iron Pellet, Non-coking Coal, Coking Coal, Limestone /Dolomite etc, and for proposed Ferroalloy plant is ... a Rotary Kiln is used for direct reduction of ore. The rotary kiln is a refractory lined vessel on which several blowers are mounted. From the blowers, air pipes go ...

Market share: About 23% of sponge iron total production. 4) Tunnel furnace process . This process is the oldest direct reduction method. In this method, Thermal coal is mixed with iron ore as a reducing agent. Natural gas generates the required reduction temperature, and reduction is performed on Silicon Carbide (SiC) Crucibles in a tunnel furnace.Reduction Efficiency of Iron OreCoal Composite Pellets in Tunnel Kiln For Sponge Iron Production SEPTEMBER-2012/1 - spongeironindia.in SEPTEMBER-2012/4 14th August. 2012 MESSAGE I congratulate Sponge Iron Manufacturers Association for organizing first ever international technical conference ...

Direct reduced iron, also called sponge iron, is produced from the direct reduction of iron ore into iron by a reducing gas or elemental carbon produced from natural gas or coal. Many ores …1. Krupp Sponge Iron Process The Krupp. Sponge iron process uses a rotary kiln for the reduction of high grade lump ores or pellets (Fig. 1). The feed is introduced together with reducing and de-sulphurizing agents (lime-stone or raw dolomite) into an inclined rotary kiln, heated counter current to the flow of hot gas and reduced to form sponge ...

The formation of accretions or 'rings' in rotary kilns used for the manufacture of directly reduced iron (sponge iron) affects the residence time of the charge, kiln hold-up, and the kiln output to a great extent. In this part of the work, the effect of ring formation was simulated at room temperature in a scaled-down model of a rotary kiln by inserting conical dams in the shape of ...DRI is also known as sponge iron, it is a solid-state direct reduction process Fig 26 Coal, dolomite and iron ore or pellets are fed into one end of a rotary kiln, while sponge iron and …

Iron Ore Pellet is used for reduction. After reduction of iron ore pellet the product resembles sponge because of pores left behind after removal of oxygen. As such it is called Sponge …SIPL is operating 4 x 100 TPD Direct Reduced Iron Rotary Kilns for production of TPA Sponge Iron, iron ore (lumps/pellets), actual reduction of iron .iron pellet reduction in sponge …

A model for the isothermal reduction of iron ore with coal char, Reduction of iron ore by coal in a rotary kiln takes place in two stages: (a) reduction of iron ore by carbon monoxide: …Data-1 includes temperatures profiles and air inlet at positions, AT-1 to AT-3 and MF-1 and MF-2, inside the kiln whereas, flow rates of iron ore, feed coal, slinger coal and sponge iron is ...

Reduction of iron ore coal composite pellets in tunnel kiln emerges with an edge over all other systems studied. Performance parameters like percentage metallic iron formed, percentage …Process of producing sponge iron pellets Download PDF Info Publication number US3645717A. US3645717A US814814A US3645717DA US814814A US3645717DA

REDUCTION BEHAVIOUR OF IRON ORE PELLETS ethesis rotary kiln iron ore pellet process pig iron or in rotary kiln for sponge iron making Sinters can be made for iron ore fines and …Direct Reduced Iron and its Production Processes- Know More. Fig 1 DRI process principle Major DRI production processes are either gas based or coal based Feed material in a DRI process is either iron ore sized to 10 to 30mm or iron ore pellets produced in an iron ore pellet plant In the gas based plant the reactor, the reduction reaction takes place is a shaft furnace...