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The iron ore and coal crushed and screened to respective sizes are fed to rotary kiln through feed tube in predetermined ratio The rotary kiln is slightly inclined at an angle 25 degree and rotated by AC variable speed motor at a variable speed ranging from 02 rpm revolutions per minute to 10 rpm

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SPONGE IRON PRODUCTION IN ROTARY KILN PDF
SPONGE IRON PRODUCTION IN ROTARY KILN PDF

Sponge iron production in rotary kiln The temperature inside the kiln is controlled by regulating the amount of combustion air admitted into the kiln through ports with the help kilb fans mounted on the kiln spojge and by controlled coal injection Part of coal is used as fuel to supply the desired heat so as to take the raw materials

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Energy survey of the coal based sponge iron industry
Energy survey of the coal based sponge iron industry

In conventional coal based sponge iron plant Fig 1 kiln feed Stream no 1 which consists of iron ore feed coal and dolomite is fed to the rotary kiln RK A separate conveyor collects different size fractions of coal Stream no 5 for injection into the kiln with the help of pressurized air Stream no 4 from discharge end side

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PDF Modeling of Rotary Kiln for Sponge Iron Processing
PDF Modeling of Rotary Kiln for Sponge Iron Processing

This point is known as Crossing Point Temperature CPT for Sponge iron lies between 200 to 350oC Lower the CTP easier for sponge iron to keep the temperature 317 Heat Transfer in Rotary Kiln Heat transfer in rotary kiln takes place by conduction convection radiation The

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ENERGY INTEGRATION IN SPONGE IRON PLANT USING
ENERGY INTEGRATION IN SPONGE IRON PLANT USING

IN SPONGE IRON PLANT USING HEAT OF WASTE GAS The raw materials iron ore coal and dolomite are charged into the rotary kiln with the help of conveyor Compressed air is injected into the rotary kiln at various places with the help of blowers

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rotary kiln for iron sand processing
rotary kiln for iron sand processing

Rotary Kiln Process of Making Sponge Iron New Age International Rotary Kiln Process of Making Sponge Iron 21 HISTORICAL BACKGROUND The production of steel began in ancient times but because of the complexity and

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Profitability analysis of power generation using waste
Profitability analysis of power generation using waste

Dec 15 2017 · Further kiln air which is the part of total air that enters to rotary kiln and is called as secondary air is preheated up to 600 °C In fact in the kiln air primary air enters to kiln with slinger coal is not included as coal may ignite beyond 200 °C before entering to kiln

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Predictive models and operation guidance system for iron
Predictive models and operation guidance system for iron

Aug 04 2015 · Predictive models and operation guidance system for iron ore pellet induration in traveling grate–rotary kiln process stoichiometric air–fuel ratio mass basis b 1 thickness of refractory bricks m PK MukhopadhyayFlow of materials in rotary kilns used for sponge iron manufacture part II Effect of kiln geometry Metall Trans B

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DESIGN OF WASTE HEAT RECOVERY SYSTEM IN A
DESIGN OF WASTE HEAT RECOVERY SYSTEM IN A

The waste gas from a sponge iron plant exits at a temperature of around 200300 C A lot of sensible heat is lost with these gases This heat is utilized to preheat the air entering to kiln Further the waste gas at reduced temperature is used to cool hot sponge iron which is previously carried out by water

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PDF i Direct Reduced Iron Production
PDF i Direct Reduced Iron Production

i Direct Reduced Iron Production rotary kiln as a reactor and coal as a reductant have been The fuel ratio is the ratio of fixed carbon to VM in natu

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Characterization of dolochar waste generated by sponge
Characterization of dolochar waste generated by sponge

Characterization of dolochar waste generated by sponge iron industry The washability data of −300 μm dolochar samples indicated that clean coal with 41wt ash at 18 yield can be produced from dolochar with 78wt ash The studies further suggested that the liberation of the dolochar is hard to achieve for clear separation

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Recovery and utilization of waste heat in a coal based
Recovery and utilization of waste heat in a coal based

Request PDF on ResearchGate Recovery and utilization of waste heat in a coal based sponge iron process The present work is an attempt to conserve energy in coal based sponge iron industry

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Annexure I Location Map Topo Map  Administrative
Annexure I Location Map Topo Map Administrative

Sponge iron char and dolochar travel from kiln to cooler and are cooled to about 80ºC by indirect cooling using water as medium The material cooled and discharged from the cooler is conveyed to product

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Cement rotary kiln questions  answers
Cement rotary kiln questions answers

Jan 07 2015 · 1 “In the name of Allah the Beneficent the Merciful” “Read in the name of thy Lord Who creates Creates man from a clot Read and thy Lord is most Generous Who taught by the pen Taught man what he knew not ” CEMENT ROTARY KILN Questions Answers Question1 What is the maximum continuous shell temperature a kiln stands without

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FACT SHEET Steel and raw materials
FACT SHEET Steel and raw materials

worldsteel has also developed a global and regional life cycle inventory LCI database including “cradletogate” environmental inputs and outputs tracking resource use raw materials energy and water and emissions to land air and water for 17 steel products The LCI data is available upon request through the worldsteel website

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A Venture of Capt Anil K Verma  Eroz Environ
A Venture of Capt Anil K Verma Eroz Environ

A Venture of Capt Anil K Verma Description of Rotary Furnace It is a Rotary kiln in the form of a metallic cylinder with conical sides on both ends Mild steel plate is used for construction of collected at bottom of hopper and is discharged through Rotary Air Lock Valve

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Virtual indurator A tool for simulation of induration of
Virtual indurator A tool for simulation of induration of

Virtual indurator A tool for simulation of induration of wet iron ore pellets on a moving grate Article in Computers Chemical Engineering 33611411152 · June 2009 with 310 Reads

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Optimization of Air Preheater Design for the
Optimization of Air Preheater Design for the

Optimization of Air Preheater Design for the Enhancement of Heat Transfer Coefficient International Journal of Applied Research In Mechanical Engineering IJARME ISSN 2231 –5950 Volume1 Issue2 2011 45 tubes expand within the casing An expansion joint between the floating tubesheet and casing provides an airgas seal

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Products  Services  Manufacturer from Ludhiana
Products Services Manufacturer from Ludhiana

Excess air can help in recirculation but this will result in wastage of fuel 30 excess air for a 1100 degree centigrade furnace will require additional 24 fuel than stoichiometric firing In comparison high velocity gases entrain and recirculate more than seven times of own volume will eliminate need for fans or

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Model and Simulation of a Ported Kiln for Iron Oxide
Model and Simulation of a Ported Kiln for Iron Oxide

A mathematical model of a ported kiln for iron oxide pelletizing was developed to simulate the effects of underbed air injection on kiln fuel requirements and magnetite oxidation

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Characterization of Ring Deposits Inside a Quicklime
Characterization of Ring Deposits Inside a Quicklime

For the kiln deposits the results show that the CaO to SiO 2 mole ratio declines further into the kiln from 093 at 11 m to 085 at 24 m In this range tilleyite is formed at 420 °C and spurrite at 450 °C

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116 Portland Cement Manufacturing
116 Portland Cement Manufacturing

rotary kiln pass countercurrently through the downwardmoving raw materials in the preheater vessels Compared to the simple rotary kiln the heat transfer rate is significantly increased the degree of heat utilization is greater and the process time is markedly reduced by the intimate contact of the solid particles with the hot gases

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Effects of coprocessing sewage sludge in cement kiln on
Effects of coprocessing sewage sludge in cement kiln on

Therefore the effects of coprocessing sewage sludge in cement kiln on the emissions of air pollutants are complicated On the one hand it can be used as a reducing agent for NO x removal Many researches showed that sewage sludge quickly release ammonia in high temperature atmosphere Cao et

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Iron Ore Pelletization Technology and its Environmental
Iron Ore Pelletization Technology and its Environmental

In the Grate Kiln System 95 of the air used for combustion is at 10000 C A straight grate with up to 50 burners cannot match this level of energy recovery x Energy Efficiency In a GrateKiln System the travelling grate is used to dry and preheat the pellets A refractory lined rotary kiln is used for induration

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Rotary Furnace  Universal Tilting Rotary Furnace
Rotary Furnace Universal Tilting Rotary Furnace

The material is heated with the help of oilgas burner which is mounted on the door until it reaches melting point Heating is immensely faster because of horse shoe flame design Due to the quick heating consumption of oil and melt loss is very less as compared to the conventional tube furnace Merits of Universal Tilting Rotary Furnace

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Metallurgical Production PlantEnergy and Environment
Metallurgical Production PlantEnergy and Environment

Energy cost is a major component of the manufacturing cost and ranges between 40 and 60 in a typical iron and steel plant The iron and steel sector comprises different subsectors such as the large ISPs miniblast furnace plants coal or gasbased DRI SI

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Pillard SULFLAM  Fives in Combustion
Pillard SULFLAM Fives in Combustion

Pillard SULFLAM is a leading technology of acid gas burners for Claus thermal reactor of Sulphur Recovery Units SRU It features a double stream acid gas tip allowing a two stage mix matching the different phases of the kinetic reaction in the Claus furnace

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Non Coking Coal for Iron Production  IspatGuru
Non Coking Coal for Iron Production IspatGuru

This coal is also known as thermal coal steam coal or boiler coal Non coking coal has three uses in ironmaking It is mainly used i for pulverized coal injection PCI into blast furnace ii for the production of direct reduced iron DRI in coal based direct reduction processes and iii for ironmaking by Corus Finex and other iron

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Cement Handbook  Clinker and Cement  Clinker and Cement
Cement Handbook Clinker and Cement Clinker and Cement

40 is burned in the kiln This serves to minimize the size of the rotary kiln and its heat loading it does not reduce specific fuel consumption It has been widely found thatpreheater kilns without precalciner vessels can also benefit from feeding 1020 of total fuel to the kiln riser

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cementplantoperationhandbook  SlideShare
cementplantoperationhandbook SlideShare

May 27 2016 · Cooler air NM3h per M2 grate area Coolerprimary air NM3 per kg clinker Temperature pressure and oxygen profile of preheater Excessive heat consumption should be investigated immediately and may be indicative of incorrect feedrate measurement or feed chemistry burner abnormality insufficient or excess oxygen air inleakage at kiln seals or preheater ports low

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