433

sl rn direct reduction process - BINQ Mining

Outotec – SL/RN direct reduction. SL/RN technology is a coal-based rotary kiln reduction process, where we have played a leading role and built over the years 32 SL/RN kilns, mainly in India and South . »More detailed. SL – RN, SL – RN process, SL – RN process characteristics – . Page up :Krupp method ( direct reduction in rotary kiln method) introduction, the development ...

269

Optimization of air distribution in direct .

An algorithm for optimization of the air distribution in direct reduction process in rotary kilns akin to the SL/RN process is proposed, based on Pontryagin's continuous maximum principle. The optimum air distribution has been obtained for given operating conditions. The optimum air distribution has been found to have a definite pattern with small changes due to variation in process .

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(PDF) 523-1 Designing of an Intelligent Fuzzy .

Sponge iron is an intermediate product of steel formed during direct reduction of iron ore with aid of regulated temperatures and pressures within a rotary kiln. The greatest challenge is the direct measurement of kiln shell temperatures due to the

17

Nitrogen in SL/RN direct reduced iron : origin .

Nitrogen in SL/RN direct reduced iron : origin and effect on the electric steelmaking process. Login. UPSpace Home → University of Pretoria: Research Output → Theses and Dissertations (University of Pretoria) → View Item; JavaScript is disabled for your browser. Some features of this site may not work without it. Show simple item record. dcntributor.advisor: Pistorius, .

544

SL/RN process - Outotec

The process principles are the basis for numerous rotary kiln plants and still represent the dominant technology for the direct reduction of lump ore or pellets using coal. Operates with the widest range of iron-bearing materials, such as pellets, lump ore, beach sand, ilmenite and also iron ore fines with SL/RN .

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SL - RN (Iron Making Rotary Kiln Process for DRI ...

01.11.2015· (SL/RN) Stelco-Lurgi/Republic-National rotary kiln process

219

Direct Reduction Process - an overview | .

However in the coal/oil-based DR process, the reducing gas is generated from hydrocarbons (primarily coal, but sometimes oil and natural gas) in the reduction zone of the furnace, which is typically a rotary kiln. Typical examples of the coal-based process include the SL/RN and ACCAR processes. The coal-based DR process is more popular in India and China. Different types of reactors, such as ...

429

OUTOTEC DIRECT REDUCTION AND SMELTING REDUCTION

direct reduction process, including laboratory and pilot plant programs. Our direct reduction offering covers: • Design, engineering, delivery, and services for tradi-tional SL/RN direct reduction plants based on a rotary kiln, with non-coking coal as the reductant and fuel. • Design, engineering, delivery, and services for SL/ RN-Xtra plants, which use a combination of a pre-hardening ...

354

Coal-Based Dr Processes Using Rotary Kilns | .

Most of the established rotary kiln-based DR processes operate on the principle that the reduction is carried out exclusively by carbon monoxide obtained by the gasification of the fixed carbon content in coal. In the year 1991, SL/RN plants alone produced 0.83 million tons of Direct reduced iron (DRI), accounting for about 56% of the world's total production of coal-based DR processes, and ...

170

(PDF) i) Direct Reduced Iron: Production

Direct reduction processes. ... Rotary kiln processes are SL/RN, ACCAR, KRUPP, CODIR, TDR, etc.; out of these, the SL/RN process is the . most common. The term SL/RN process stands for S .

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OPERATIONAL ASPECTS OF SPONGE IRON PRODUCTION IN A .

amalgamation which, in 1964, led to SL-RN process, For the development of the process upto the present state, three pilot plants have been erect-ed and operated and several commercial plants are already in operation or are in the state of erection. The SL-RN process also uses rotary kiln for reducing iron ore. The plant, as shown in Fig.

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SL/RN | Downstream Consulting Pty Ltd

The SL/RN process is a kiln based direct reduction process which produces hot or cold DRI from lump, pellets, fines (including iron sands and ilmenite ore). The process is coal based and works at high temperature and near atmospheric pressure. The iron oxide combined with coal (usually low cost non-coking coal) and fluxes is fed to the elevated end of the SL/RN rotary kiln. The kiln is divided ...

145

sponge iron process

Flow chart of SL/RN process has been shown in fig. 1.Sized Iron Ore and Non Coking Coal along with Dolomite are fed continuously to the charge end of Rotary Kiln inclined at 2.5%. Coal is also injected through an Injection Pipe at the discharge end of Kiln. Due to the inclination and rotation of Kiln the charge material moves along the length of Kiln where it is discharged continuously after ...

435

(PDF) 523-1 Designing of an Intelligent Fuzzy .

Sponge iron is an intermediate product of steel formed during direct reduction of iron ore with aid of regulated temperatures and pressures within a rotary kiln. The greatest challenge is the direct measurement of kiln shell temperatures due to the

469

Prospects for Coal-based Direct Reduction Process

Prospects for Coal-based Direct Reduction Process Haruyasu MICHISHITA*1, ... 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 operating temperatures must be maintained in a range from 1,000 to 1,100℃3 ...

223

Nitrogen in SL/RN direct reduced iron : origin .

Nitrogen in SL/RN direct reduced iron : origin and effect on the electric steelmaking process. Login. UPSpace Home → University of Pretoria: Research Output → Theses and Dissertations (University of Pretoria) → View Item; JavaScript is disabled for your browser. Some features of this site may not work without it. Show simple item record. dcntributor.advisor: Pistorius, Petrus ...

496

Outotec Sl Rn Rotary Kiln Direct Reduction .

Outotec Sl Rn Rotary Kiln Direct Reduction Technology. reduction processes including SLRN2 employ rotary kilns Pellets or lumpore mixed with coal areis charged into the rotary kilns2 and heated by coal burners to produce DRI To avoid the significant formation of the kiln rings their operating temperatures must be maintained in a range from 1000 to 11003 As a result the

85

Coal based Direct Reduction Rotary Kiln Process – .

The process of direct reduction is carried out in a rotary kiln where the operating temperatures are maintained in a range from 1,000 deg C to 1,100 deg C. The product of the kiln (DRI and char mix) is then cooled in a rotary cooler with external water cooling system. The products of the kiln is screened and magnetically separated. DRI being magnetic gets attracted and gets separated from non ...

288

Present State of the Sl/Rn Process and Its .

The paper describes the present state of development of the SL/RN Process, discussing the reasons for using solid fuels as reductants and the application of a rotary kiln as reactor. Especially critical thought is given to the problem of economy,of the direct reduction processes with regard to the prices of ore, coal and energy. In connec-tion with the description of the SL/RN or Lurgi rotary ...

318

SL - RN (Iron Making Rotary Kiln Process for DRI ...

01.11.2015· (SL/RN) Stelco-Lurgi/Republic-National rotary kiln process

490

STATE OF THE DIRECT REDUCTION AND REDUCTION SMELTING PROCESSES

MIDREX, HYLSA, SL/RN, TECNORED, FASTMET/FASTMELT, REDSMELT, INMETCO, AISI. ... - Rotary kiln: many processes employ rotary kiln for primary reduction; solid or gaseous reducing agents (or the mixtures thereof) are permissible: REDSMELT, FASTMET/FASTMELT, INMETCO. - Fluosolid reactors: Processes based on small-grained ore, in the course of which the ore is fluidized .

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Simulation of Rotary Kiln Used in Sponge Iron Process ...

Rotary kiln is cylindrical in shape and is 80m long having 4.2m internal diameter. This is the reactor of the process where reduction as well as combustion reactions are carried out. The role of kiln is to convert the raw material (iron ore, coal and dolomite) into the sponge iron [8]. Detail reaction mechanism of the process is discussed below:

378

sponge iron process

Flow chart of SL/RN process has been shown in fig. 1.Sized Iron Ore and Non Coking Coal along with Dolomite are fed continuously to the charge end of Rotary Kiln inclined at 2.5%. Coal is also injected through an Injection Pipe at the discharge end of Kiln. Due to the inclination and rotation of Kiln the charge material moves along the length of Kiln where it is discharged continuously after ...

519

Rotary Kilns | ScienceDirect

We start with the cement and lime processes and then move on to describe some of the carbothermic reduction processes that employ the rotary kiln as the primary device where we examine two processes, iron ore reduction (the SL/RN (acronym for steel-making companies Stelco, Lurgi, and Republic National) process) and ilmenite ore reduction (the Becher process). We then examine the .