rotary kiln dri process

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.

Direct Reduction Process - an overview ScienceDirect Topics

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 ...

Direct Reduced Iron and its Production Processes – IspatGuru

Mar 16, 2013  DR process, DRI, HBI, Iron making. Metallization, reformed natural gas, residual elements, Rotary kiln, Direct Reduced Iron and its Production Processes. Direct reduced iron (DRI) is the product which is produced by the direct reduction of iron ore or other iron bearing materials in the solid state by using non-coking coal or natural gas.

Rotary Kiln - an overview ScienceDirect Topics

A. A Boateng, in Rotary Kilns (Second Edition), 2016. 10.4 The Cement-Making Process. Rotary kilns are synonymous with cement making, being the workhorses of this industry. There are many types of rotary kiln arrangements for producing cement clinker with each incremental design goal aimed at improving energy efficiency, ease of operation, and product quality and minimizing environmental ...

DRI production International Iron Metallics Association

coal based rotary kiln furnaces (mainly in India) - accounting for 17.5% of 2016 production. Generic illustrations of the types of process are shown in the graphics below. Overview of direct reduction process types. Direct reduction furnace types. Direct reduction processes for iron. Illustrations of the principal processes are shown below.

Prospects for Coal-based Direct Reduction Process

based DRI occupies 17.6 million tonnes, which equates to 25.7% of the total1). Most coal-based reduction processes including SL/RN2) employ rotary kilns. Pellets, or lump-ore, mixed with coal are/is charged into the rotary kilns2) and heated by coal burners to produce DRI. To avoid the significant formation of the kiln rings, their

DRI UPDATE - Sponge Iron Manufacturer India

the DRI rotary kiln to improve utilization of Thermal Energy. 2) Technological options for recovery of heat which is being lost a)from exhaust gas (which is at 170 -180°C ) b)Indirect cooling of

Rotary Kiln – Electrotherm – Engineering Technologies ...

Coal Based Rotary Kiln for Direct Reduced Iron / Sponge Iron (100 TPD, 350 TPD, 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).

Direct Reduced Iron (DRI) International Iron Metallics ...

DRI can be either hot or cold charged to the EAF. Some steel companies ship DRI from their captive direct reduction plants to their remote steel mills and a small volume of DRI is sold to third parties. In India there are many small rotary kiln furnaces producing DRI, known locally as sponge iron, using coal as energy and reductant source.

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.

SPONGE IRON PLANT

The rotary kiln process chosen for the unit considers reduction of iron ore (5-20 mm) with solid carbonaceous material like coal heated up to a temperature of 950-10000c in rotary kiln and then . spongeitc 10 cooled in a rotary cooler with external water cooling system. The

100Tpd/500Tpd Dri Rotary Kiln Equipment Rotary Kiln For ...

sponge iron dri rotary kiln The introduction of Rotary kiln: a, Rotary kiln is the main equipment for sintering cement clinker. b, The rotary kilns produced by our company can be divided into dry process and wet process.

(PDF) i) Direct Reduced Iron: Production

The industrial development program of any country, by and large, is based on its natural resources. Depleting resources of coking coal, the world over, is posing a threat to the conventional ...

Direct Reduction Process Description HeatTreatConsortium

Process Description RD Trends. In a direct reduction process, lump iron oxide pellets and/or lump iron ore, are reduced (oxygen removed) by a reducing gas, producing direct reduced iron (DRI). If the cooling stage is omitted, the DRI can be immediately briquetted into hot briquetted iron (HBI).

rotary kiln DRI production technology - YouTube

Our company is professionally engaged in research and development on direct reduced iron technology, we mainly popularize rotary kiln technology and rotary h...

SLRN process - Metso Outotec

Our standard rotary kiln (4.8 x 80 m) is capable of producing up to 160,000 tons DRI per annum depending on the raw material. In the SL/RN-Xtra version, this figure goes up to 200,000 t/a. Typical consumption figures per ton of DRI produced from lump ore or pellets are: Iron ore: 1.46 t ; Coal: 380–450 kg Cfix depending on coal properties

(PDF) Operability Analysis of Direct Reduction of Iron Ore ...

Case studies from the iron and steel industry on model-based optimization of production of direct reduced iron in a rotary kiln and induration of wet iron ore pellets on a moving packed bed ...

DRI production International Iron Metallics Association

coal based rotary kiln furnaces (mainly in India) - accounting for 17.5% of 2016 production. Generic illustrations of the types of process are shown in the graphics below. Overview of direct reduction process types. Direct reduction furnace types. Direct reduction processes for iron. Illustrations of the principal processes are shown below.

Direct Reduced Iron (DRI) International Iron Metallics ...

DRI can be either hot or cold charged to the EAF. Some steel companies ship DRI from their captive direct reduction plants to their remote steel mills and a small volume of DRI is sold to third parties. In India there are many small rotary kiln furnaces producing DRI, known locally as sponge iron, using coal as energy and reductant source.

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.

Direct Reduction Process Description HeatTreatConsortium

Process Description RD Trends. In a direct reduction process, lump iron oxide pellets and/or lump iron ore, are reduced (oxygen removed) by a reducing gas, producing direct reduced iron (DRI). If the cooling stage is omitted, the DRI can be

SLRN process - Metso Outotec

Our standard rotary kiln (4.8 x 80 m) is capable of producing up to 160,000 tons DRI per annum depending on the raw material. In the SL/RN-Xtra version, this figure goes up to 200,000 t/a. Typical consumption figures per ton of DRI produced from lump ore or pellets are: Iron ore: 1.46 t ; Coal: 380–450 kg Cfix depending on coal properties

OPERATIONAL ASPECTS OF SPONGE IRON PRODUCTION

Rotary Kiln Reduction Process at NML The rotary kiln at NML (Fig. 3) consists of a steel shell of 900 mm diameter and 10700 mm in length. The kiln is provided with spring load-ed stationary inlet and outlet segments with pro-. per air tight seals to prevent infiltration of air or gas leakage between the stationary heads and the rotary kiln.

(PDF) Modeling of Rotary Kiln for Sponge Iron Processing ...

From this prospective, the rotary kiln (coal based) Due to its process advantages and product quality, SL/RN is mostly practiced. Some companies also adopt this after some modification. Use of Rotary Kiln as reactor makes it known as Rotary Kiln based Direct Reduction (RKDR). Strengths of Rotary Kiln produced Sponge Iron. Govt.

Direct Reduced Iron Industrial Efficiency Technology ...

Direct Reduced Iron (DRI), also known as Sponge Iron, offers an alternative steel production route to BF-BOF and Scrap-EAF routes. In DRI, iron ore is reduced in its solid state – unlike BF process where a liquid metal is formed during reduction. DRI can then be transformed to steel in electric arc furnaces. DRI production is common in Middle East, South America, India and

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

The process of the direct reduction of haematite in a rotary kiln is schematically described in the Fig. 1. Haematite and non-coking coal are fed to the kiln at controlled rates without pre-mixing and the charge moves through the kiln depending upon the rotation speed and inclination of the kiln. In combination with the feed

Coal Gas based DRI Plant - Rotary Kiln for Making Sponge ...

Manufacturer of Coal Gas based DRI Plant - Rotary Kiln for Making Sponge Iron, Sponge Iron Plant, Gas Based HYL DRI Plant and Coal Based DRI Plant offered by Remso Control Technologies Private Limited, Greater Noida, Uttar Pradesh.

100Tpd/500Tpd Dri Rotary Kiln Equipment Rotary Kiln For ...

sponge iron dri rotary kiln The introduction of Rotary kiln: a, Rotary kiln is the main equipment for sintering cement clinker. b, The rotary kilns produced by our company can be divided into dry process and wet process.

Principles of Heat Transfer as Applied to Rotary Dryers ...

Whether you are using a rotary dryer, rotary kiln, or rotary cooler, there is one thing that all these instruments have in common: they all use methods of heat transfer to carry out their jobs.Heat transfer is how heat moves from one source to another. Understanding the types of heat transfer, and how they differ, is an important part in understanding how a rotary dryer, cooler, or kiln

WORLD DIRECT REDUCTION STATISTICS

Rotary Kiln 17.6% 20.2% 24.0% Rotary Kiln 24% Other 0.2% PERED® 2.1% World DRI production surpasses 108M tons in 2019 from production increases in India, Iran and Algeria 2019 Top 5 DRI Producing Nations COUNTRY PRODUCTION (Million Tons) India 33.74 Iran 28.52 Russia 8.03 Mexico 5.97 Saudi Arabia 5.79

Cement Rotary Kiln Refractory Lining Selection Principle ...

The refractory lining on the interior of the cement rotary kiln is a crucial component in ensuring the kiln’s working efficiency and protecting the kiln shell from melting down.. There are many refractory materials that can be used to form the refractory lining of cement rotary kilns.