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SPONGE IRON PRODUCTION FLOW CHART Raw Material Feeding to Kiln (Iron Ore, Coal, Dolamite) Rotary Kiln (Conversion of Raw Iron Ore into Sponge Iron) Cooler (Sponge Iron Cooling below 100deg by external Water Cooling) Intermediate Bin Desired Quality (for Blending) Screening in Product House Lumps Magnetic Separation Lumps Bunker Despatch [email protected]Chat Online
DRI, also known as sponge iron, is the product of reducing iron oxide in the form of iron ore and steel plant wastes into metallic iron, below the melting point of iron and typically in the range of 800–1200 C. Iron oxide is charged into shaft furnace, rotary kiln, or fluidized beds in the form of pellet, iron ore lumps, or fines. The reduction takes place using gaseous reductants (CO + H.Making process iron ore to sponge iron. Making process iron ore to sponge iron SECONDARY AIR Secondary air is introduced axially in the direction of the gas flow The air supplied to the length of the kiln is metered for close control of temperature and gas atmosphere in the kiln Heating zone extends from 25 to 40 along length of the kiln.2. ED, SIMA requested the participants to volunteer to spare their rotary kiln for carrying out the R D for exploring the use of Syn Gas in the rotary kiln. Mr. T Srinivasa Rao, MD, Balajiswamy Premium Steels Pvt Ltd offered his 50TPD kiln for this purpose. 3. Presentation from Tata Sponge Iron Ltd was very much liked and lot of the people showed.Raw material mix-iron ore, dolomite and coal are fed to one end of rotary Kiln and product sponge iron along with char is taken out from the other end. Apart from this, primary and secondary airs are supplied to the Kiln to initiate the combustion and reaction processes. The reaction takes place at high temp (1050˚C to 1065˚C).
Iron ore (haematite) and non-coking coal are the prime raw materials for the production of sponge iron. These are charged into a rotary kiln in requisite proportion along with some dolomite. Coal plays a dual role in the process by acting as a reductant as well as a fuel for providing heat to maintain the requisite temperature inside the kiln.Sponge iron filter material adopt high grade ore, using the REDOX reaction principle, through a filter in addition to the lake way out, pipe, boiler and circulating water dissolved oxygen corrosion after water treatment water dissolved oxygen content can be below 0.05 mg L.In rotary kiln, shaft furnace or other reactor, coal, coke, gas or hydrogen gas, iron ore and pellets of iron concentrate.The quality of these materials has direct bearing on the process as well as the product. Some plants do not use iron ore directly. These plants use iron ore pellets in the rotary kiln. Raw material mix consisting of iron ore, dolomite and non-coking coal is fed at the one end of the rotary kiln and is heated by coal burners to produce DRI.Iron Ore Lump iron ore in the size range of 5-20mm can be used in all coal based rotary kiln processes. In gas based processes 70 iron ore pellets and 30 lump iron ore of 10-30mm are being used. In general high grade iron ore of 65 minimum Fe (total) with less decrepitating characteristics is preferred for use in rotary kiln.
2II. Rotary kiln Operation and construction details A schematic diagram of the rotary kiln of sponge iron process considered for the present work is shown in Fig. 1. The rotary kiln consists of a rotating cylindrical shell lined inside with refractory material. The kiln is around 80 m long with 4 m.Building Materials Equipment Stoke Rotary Kiln. Operational aspects of sponge iron stone or raw dolomite into an inclined rotary kiln heated counter current to the flow of hot gas and reduced to form sponge iron depending on its content of volatile matter the coal is partly blown into the kiln from the discharge end and or partly fed together.Chatterjee A, Sathe A and Mukhopadhyay P (1983) Flow of materials in rotary kilns used for sponge iron manufacture Part II. Effect of kiln geometry. Metallurgical and Materials. 14, 383-392.Jul 14, 2014 Raw material mix-iron ore, dolomite and coal are fed to one end of rotary Kiln and product sponge iron along with char is taken out from the other end. Apart from this, primary and secondary airs are supplied to the Kiln to initiate the combustion and reaction processes. The reaction takes place at high temp (1050 to 1065˚C ˚C).
Table 2.1 Raw Materials for Production of Sponge Iron Material Size Iron Ore 5-18 mm Coal 3-20 mm Dolomite 2-6 mm Air - 2.1.3. Theory In any rotary kiln process based on coal, the reduction of iron oxide takes place by the carbon monoxide produced from coal. The.Keywords Sponge Iron, Heat Transfer, Rotary Kiln . 1. Introduction . In Rotary kiln, carbon is charged from either end, in one end in the form of coal particles and in another in form of coal lumps. The coal reacts with air to form carbon monoxide which then reduces iron oxide (ore) to iron. So, in a kiln,.Production. In this paper the direct reduction of iron ore to sponge iron is used as an example. The model incorporates a large number of variables, covering, among others feed properties and rates, combustion options, kiln operating information (speed and fill level), blower locations and flow rates, and the environmental conditions.Jan 30, 2011 It also reveals various commercially used DR processes, which are adopted by many national and international steel plants all over the world. The raw material flow in the rotary kiln and the stages involved are all discussed in detail. The book also reveals how to store and handle the produced sponge iron which is highly exothermic in nature.