SL/RN Process | Industrial Efficiency Technology & Measures
SL/RN process - mogroup.com
In the standard SL/RN process, iron ore, coal, and dolomite or limestone as desulfurizing agent are charged into a rotary kiln and heated up by a countercurrent gas flow. Heat is generated by the controlled combustion of volatiles from the coal and surplus CO from the charge.
Coal based Direct Reduction Rotary Kiln Process – IspatGuru
Fig 1 Cross section of rotary kiln. Coal based direct reduction process is based on the solid reducing agent which is non-coking coal. The reaction takes place at high temp (1000 deg C to 1100 deg C). Coal plays a dual role in the kiln. Part of coal is used as fuel to supply the desired heat so as to take the raw materials to the desired temperature.
SL/RN | Downstream Consulting Pty Ltd
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 into 2 sections, the feed end is …
Nitrogen in SL/RN Direct Reduced Iron: Origin and Effect ...
rotary-kiln coal-based processes such as the Stelco-Lurgi/Republic-National (SL/RN) rotary kiln process.1 In this process, approximately 1.5 tons of lump ore (-31.5+3.15mm), 800 kg of coal and 40 kg of dolomite are fed to a kiln to produce 1 ton of DRI. At the kiln exit, the
Direct Reduction Process - an overview | ScienceDirect Topics
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 shaft furnaces, fluidized beds, rotary kilns, …
coal based sponge iron process - help4helpngo.com
Sep 01, 2015· The actual process of the coal based sponge iron production is based on SL/RN process (jointly developed by the Steel Company of Canada, Lurgi Chemie, Republic Steel Company and National Lead Corporation in 1964), which works on direct reduction of process is adopted by worldwide conventional sponge iron industries.
Energy survey of the coal based sponge iron industry ...
Sep 01, 2015 · The actual process of the coal based sponge iron production is based on SL/RN process (jointly developed by the S teel Company of Canada, L urgi Chemie, R epublic Steel Company and National Lead Corporation in 1964), which works on direct reduction of ore. This process is adopted by worldwide conventional sponge iron industries.
Sl Rn Natural Gas Based Rotary Kiln
Coal Based Rotary Kiln Sl Rn Process. The so-called Stelco-Lurgi/Republic Steel-National Lead (SL/RN) process is a widely used coal-based DRI-making process which uses a rotary kiln The process uses lump ore, pellets, beach sand or ilmenite ore and solid carbon to produce hot or cold DRI The process operates at high temperature and atmospheric ...
Direct Reduced Iron | Industrial Efficiency Technology ...
rotary kilns ( SL/RN process) rotary hearth furnaces ( Fastmet ® /Fastmelt ®, and ITmk3 ®) fluidised bed reactors ( Circored ®) (IPPC, 2009) As there is no melting and no slag phase in DRI production, all gangue elements of the iron ores remain in the DRI and need to be separated via a slag in the EAF.
Prospects for Coal-based Direct Reduction Process
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 operating temperatures must be maintained in a range from 1,000 to 1,100℃3).
how does a coal based rotary kiln operates
Design, engineering, delivery, and services for traditional SL/RN direct reduction plants based on a rotary kiln, with noncoking coal as the reductant and fuel. Design, engineering, delivery, and services for SL/ RNXtra plants, which use a combination of a prehardening grate and traditional SL/RN kiln for the treatment of iron ore fines.
(PDF) COMPARISON OF DIFFERENT COAL BASED DIRECT …
The coal-based processes can be grouped into four categories according to their reduction reactors. The rotary kiln processes include ACCAR/OSIL, DRC, Krupp-CODIR and SL/RN processes. Kinglor Metor...
NITROGEN IN SL/RN DIRECT REDUCED IRON: ORIGIN AND …
approximately 25% of DRI is produced in coal-based reductant processes. 2, one of which is the Stelco-Lurgi/Republic-National (SL/RN) rotary kiln process. In 2010, this process produced 2.5% of total DRI worldwide, primarily in India and secondly in South Africa (specifically at ArcelorMittal, Vanderbijlpark).
BHAGWATI POWER & STEEL LIMITED
SL/RN Process, useful when coal of low ash & sulphur content available ROTARY KILN Process, the most widely accepted process. The ITC Technology which has experience in operation of smaller plants using the wide range of raw materials from different sources like iron ores from Ballery-Hospet region, Bailadilla, Barbil etc.
Case Studies in Thermal Engineering
The actual process of the coal based sponge iron production is based on SL/RN process (jointly developed by the Steel Company of Canada, Lurgi Chemie, Republic Steel Company and National Lead...
Rotary kiln - Wikipedia
The process feedstock is fed into the upper end of the cylinder. As the kiln rotates, material gradually moves down toward the lower end, and may undergo a certain amount of stirring and mixing. Hot gases pass along the kiln, sometimes in the same direction as the process material (co-current), but usually in the opposite direction (counter-current).
Direct Reduced Iron and its Production Processes – IspatGuru
Mar 16, 2013 · The first plant of Midrex process came into operation in May 17, 1969 at Oregon Steel mills in Portland, Oregon. The coal based rotary kiln process combines the Republic Steel-National Lead (RN) process developed in 1920s for beneficiating low grade ores, and the Stelco-Lurgi (SL) process conceived in the early 1960s for producing high-grade DRI.
Direct and smelting reduction - Metso Outotec
Design, engineering, delivery, and services for traditional 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 grate and traditional SL/RN kiln …