Background

iron bricks from dri kiln process

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

 · iron ore is in direct contact with the reducing agent through-out the reduction process, it is often termed as direct reduced iron (DRI). It is seen that the growth of sponge iron industry in last few years is unremarkable and today India is the largest producer of sponge iron as it covers 16% of global output. According to Sponge Iron

Tunnel Kiln Dri Process Flow Chart And Material-GOLD …

tunnel kiln dri process flow chart and material. reduction kiln process of pig iron etsiviaggiarecisl. direct reduction of iron ore from tunnel kiln process. Aug 30 2018& 183; HYL Process for Direct Reduction of Iron Ore ispatguru. Apr 22 2017 HYL process for direct reduction of iron ore was the fruition of research a process using a tunnel

Coal based Direct Reduction Rotary Kiln Process – IspatGuru

 · The main raw materials for the production of DRI by the rotary kiln process are (i) sized graded iron ore or iron ore pellets, (ii) non-coking coal, and (iii) dolomite in small quantities to scavenge the sulphur. Iron ore of the right quality is the basic input for the coal based direct reduction process.

SPONGE IRON PRODUCTION FROM ORE -COAL …

 · However, Rotary kiln process suffers from serious limitations like low productivity and pollution. In this respect fixed bed Tunnel kiln furnace are evolving as an alternative to Rotary kiln process. Iron ore fines and the low grade beneficiated iron ore cake are directly used for manufacturing of sponge iron in tunnel kilns.

Reduction of iron ore briquettes into DRI in the tunnel ...

We offer third generation tunnel kiln process from China, to convert soft iron ore lumps or briquetted iron ore fines into Direct Reduced Iron (DRI). DRI or sponge iron is a high-quality metallic product and used as a feed-stock in the induction furnace / electric arc furnace. The investments on the tunnel kiln plants are 20-25% lower than the ...

Direct-reduced Iron Production Kiln Sponge Iron Dri ...

Direct-reduced Iron Production Kiln Sponge Iron Dri Production Plant, Find Complete Details about Direct-reduced Iron Production Kiln Sponge Iron Dri Production Plant,Direct Reduced Iron Production Kiln,Dri Production Plant,Sponge Iron Dri Production from Cement Making Machinery Supplier or Manufacturer-Henan Dajia Mining Machinery Co., Ltd.

OPERATIONAL ASPECTS OF SPONGE IRON …

 · 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 ...

Nitrogen in SL/RN Direct Reduced Iron: Origin and Effect ...

 · In the steel plant considered here, direct reduced iron (DRI), produced by the coal-based SL/RN process, makes up 50% or more of the total iron charge. SL/RN DRI samples from a kiln cooler had high nitrogen contents (50-250ppm, depending on particle size), contributing to elevated nitrogen levels in liquid steel produced in the EAFs.

DRI production | International Iron Metallics Association

DRI production. Direct reduction of iron is the removal of oxygen from iron ore or other iron bearing materials in the solid state, i.e. without melting, as in the blast furnace. The reducing agents are carbon monoxide and hydrogen, coming from reformed natural gas, syngas or coal. Iron ore is used mostly in pellet and/or lumpy form.

Sponge iron from magnetite - A novel process developed …

 · Sponge iron from magnetite - A novel process developed in India. New Delhi [ India ], October 12 (ANI/PNN): With India eyeing record steel exports …

CASE GROUP - casepl.com

 · CASE Group success story includes commissioning DRI Tunnel Kiln, first of its kind in India for use of all kind of iron ore fines. The cost-effective tunnel kiln technology brings final product which has density of 4 GMS/CC thus making it usable directly for melting in induction furnace, arc furnaces.

Energy Audit Methodology of Sponge Iron …

 · the kiln process chemistry. This article tries to establish detailed energy audit methodology of sponge iron manufacturing process or kiln operation with a view to finding out major energy sav-ing potential of the unit. In the research work we find that it is the incomplete reaction of coal that causes the major energy inefficiency in the process.

SPONGE IRON – Lloyd's Metals

Sponge iron making is a process in which iron ore lumps (typically 5mm-18mm size) are tumbled with a 'select' grade of iron-coking coal little dolomite inside an inclined rotary kiln and control combusted in the presence of air for about 12 hours before the products are air cooled, magnetically separated, screened and size wise in finished ...

Resources Trend and Use of Direct Reduced Iron in ...

 · 2. Status of world DRI production Direct reduction is a process for reducing iron ore in the solid state. It requires much less capital investment than the BF process and requires no coke. Therefore, DR plants have nbeen built mainly in oil and natural gas producing countries to supply raw iron for EAF processes. Particularly in the

Modelling and optimization of a rotary kiln direct ...

 · Modelling and optimization of a rotary kiln direct reduction process 55 Figure 3. Kiln temperature distribution for the base case The feed material (bed) enters the kiln at ambient temperature and rapidly heats up due to the hot gas in the freeboard.

Reduction of iron ore briquettes into DRI in the tunnel ...

GoodRich offers third generation tunnel kiln process from China, to convert soft iron ore lumps or briquetted iron ore fines into Direct Reduced Iron (DRI). DRI or sponge iron is a high-quality metallic product and used as a feed-stock in the induction furnace / electric arc furnace.

CASE GROUP - casepl.com

 · DRI Tunnel Kiln. DRI (Direct Reducted Iron) Tunnel Kiln was commissioned on 24 November 2011. CASE gave this technology to India and this was also first of its kind in India. The process has been established now after earlier hiccups. The process of Tunnel Kiln uses fines of Iron ore and Coal which are mixed together in specified propotions to ...

DRI UPDATE - Sponge Iron Manufacturer India

 · 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

(PDF) Production of Sponge Iron through Tunnel …

Production of Sponge Iron through Tunnel Kiln Process. April 2010; ... LRF route using DRI / sponge iron. July 2016. Swaren Bedarkar ... The amount of sponge iron in the charge mix varies from 0 ...

SPONGE IRON PLANT

 · Sponge iron being magnetic gets attracted and gets separated from non- magnetic char. The iron ore and coal crushed and screened to respective sizes are fed to rotary kiln through feed tube in pre-determined ratio. The rotary kiln is slightly inclined at an angle 2.5 deg and rotated by

2-3 Lime Kiln Chemistry & Effects on Kiln Operation

 · Lime Kiln Chemistry and Effects on Kiln Operations Honghi Tran Pulp & Paper Centre University of Toronto ... and silicate impurities in lime mud and bricks ... Guarded Sodium Formed inherently during the causticizing process: Ca(OH) 2 + Na 2CO 3 = 2 NaOH + CaCO 3 (Ca 1-xNa 2x)CO 3 Ca2+ Na+ Ca2+ Ca2+ Ca2+ Ca2+ Ca2+ CO 3 2-CO 3 2-CO 3 2-CO 3 2-CO ...

A Mathematical Modelling and Simulation for Reduction in ...

 · The flow process for a typical sponge iron and electricity production via rotary kiln is shown in figure below:-Fig 3: Sponge iron production in DRI rotary kiln. GEOMETRY AND BOUNDARY CONDITIONS. The geometry shown in fig 4 shows the overall dimension of the kiln considered for the paper. Fig 4: Length and cross-section of rotary kiln

Direct Reduced Iron (DRI) Refractories - Resco Products

Direct Reduced Iron (DRI) is an alternative to the blast furnace processes to produce a source of iron units. Greater availability of natural gas has replaced classic coke oven coal-based processes. Several processes are commercially viable today and they use a number of ways to achieve good quality DRI. Refractories for DRI

Rotary Kiln Manufacturers | Electrotherm E&T

Rotary Kiln with SL/RN Process. Coal Based Rotary Kiln for Direct Reduced Iron / Sponge Iron (100 TPD, 350 TPD, and 500 TPD) Solid-state reduction of Iron Ore using either coal/gas as a medium of reduction to produce a substitute raw material for steel making is termed as Direct Reduced Iron (DRI). Since DRI is produced by removing oxygen from ...

Prospects for Coal-based Direct Reduction Process

 · DRI, making DRI from iron-ore and coal. The process, however, has a drawback: the DRI produced may have a decreased iron content and/or increased sulfur content, depending on the quality of the coal used. This impedes the commercial use of the process for producing DRI from iron ore. On the other hand, with an eye to resource

Direct Reduction Process - an overview | ScienceDirect …

The basis of the direct reduction process is that solid sponge iron is produced by removing oxygen from the ore in a shaft furnace, rotary kiln furnace or fluidised bed. Sponge iron can be produced in the form of Direct Reduced Iron (DRI), Hot Briquetted Iron (HBI) and Cold Briquetted Iron (CBI); also Low Reduced Iron (LRI), which is pre ...