Ladle Furnace Operation Pdf

Secondary Refining - AISI: American Iron and Steel Institute

Description and Operation of a Ladle Furnace By James C Simmons, Sr Vice President Meltshop Division, Techint Technologies Inc A Ladle Furnace is used to relieve the primary melter of most secondary refining operations, and its primary functions are: § Reheating of liquid steel through electric power conducted by graphite electrodes

Understanding Electric Arc Furnace Operations

is toward ultra-high-power furnaces in the range of 900 to 1000 kVA per ton of furnace capacity A typical energy balance (Sankey diagram) for a modern EAF is shown in Figure 3 Depending upon the meltshop operation, about 60 to 65% of the total energy is elec- tric, the remainder being chemical

Ladle furnace

Ladle furnaces are used for a manifold of metallurgical applications As an example, for specialty steels the ladle furnace is used to desulfurize the melt after vacuum degassing A prominent example is the plasma ladle furnace for desulfurizing nickel-based alloys

(PDF) Effect of plug location on desulfurization

Effect of plug location on desulfurization characteristics of slag during Ladle Furnace operation Article (PDF Available) in Canadian Metallurgical Quarterly 45(2):175-180 · January 2006 with 98

LADLE FURNACES (LF) THE QUALITY LINK BETWEEN MELTING …

Ladle furnaces are available as single or twin ladle furnace, depending on productivity demand and cycle time of downstream equipment • Operation with submerged arc under synthetic slag • Efficient energy input with high active power and efficient heat transfer

Understanding electric arc furnace operations for steel

UHP furnaces, oxy-fuel burners, water- cooled side panels (which allow for higher power after the steel is molten), foamy slag practices (which also permit higher power), and ladle metallurgy (which removes the refining function from the furnace and shifts it to a ladle into which the molten metal is poured)

Ladle Furnace Refractory Lining: A review - ijlera

continuous, trouble-free ladle operation In this paper, the effect of various refractory combinations on the ladle system is reviewed Keywords: Heat loss, Ladle Furnace, Refractory Lining, Optimization, Steel manufacturing 1 INTRODUCTION Steel industries are important for the development of a nation In steel plant we use different types and

Ladle Refining Furnaces (LRF) - Inductotherm Corp

Ladle refining of liquid metal is a proven technology to produce high quality steel A Ladle Refining Furnace is used to raise the temperature and adjust the chemical composition of molten metal

Power transformers Special transformers Furnace and

Ladle furnaces (LF) are AC furnaces typically of 3 to40 MW The application is less demanding for the transformer than smelting, Transformers for DC furnace operation are normally provided in a transformer/rectier package DC furnaces are typically one of the largest arc furnaces…

Electric arc furnace - Wikipedia

Maintenance of the conductive furnace hearth is a bottleneck in extended operation of a DC arc furnace In a steel plant, a ladle furnace (LF) is used to maintain the temperature of liquid steel during processing after tapping from EAF or to change the alloy composition

Ladle furnace

Ladle furnaces are used for a manifold of metallurgical applications As an example, for specialty steels the ladle furnace is used to desulfurize the melt after vacuum degassing A prominent example is the plasma ladle furnace for desulfurizing nickel-based alloys

LADLE FURNACES (LF) THE QUALITY LINK BETWEEN MELTING …

Ladle furnaces are available as single or twin ladle furnace, depending on productivity demand and cycle time of downstream equipment • Operation with submerged arc under synthetic slag • Efficient energy input with high active power and efficient heat transfer

Ladle Refining Furnaces (LRF) - Inductotherm Corp

Ladle refining of liquid metal is a proven technology to produce high quality steel A Ladle Refining Furnace is used to raise the temperature and adjust the chemical composition of molten metal Without LRFs, higher tap temperatures are normally required from steel making furnaces due to heat losses during refining with conventional ladles

`INDUREF’ - Induction Ladle Refining Furnace for Secondary

Operation and maintenance of the AC-arc LRF is difficult due to the number of moving parts and the complex control system Furthermore, use of electrodes for processing of low carbon steel grades causes carbon pick up resulting in production of off grade steel or high cost 3 DEVELOPMENT OF LADLE REFINING FURNACE AT ELECTROTHERM

Surge Protection for Ladle Melt Furnaces - Eaton

Switching Operations For short outage, such as between heats, the is opened The operations are reversed for energizing the furnace VCB transformer circuits After a short outage, is closed which energizes the furnace transformer Each heat lasts for the VCB about an hour

Metallurgy LF-EMS Reducing cost and improving quality

feeding and inclusion removal Operation is characterized by low stirring cost, reliable and safe operation, optimum conditions for reproducible production of high quality steel and precise logistics ABB has developed a complete set of stirrers for ladle furnace, covering a wide range of ladle furnace sizes from 10 up to 330 tonnes

Making of Steel | Steelmaking | Blast Furnace

Liquid steel being tapped into a ladle car April 2013 n Tata Review 79 Large ladles an alloy that is tougher than iron capable of holding 170 tonnes of liquid metal700°C A water-cooled lance is lowered into the furnace to blow in pure oxygen

LECTURE 15 Electric Furnace S teelmaking - NPTEL

LECTURE 15 Electric Furnace S teelmaking Contents : Introduction Type of Electric furnaces Construction of AC Electric Arc Furnace Transformer power Charging materials Plant layout Arc furnace operation Comparison with oxygen steelmaking Key words: Electric arc furnace, Melt -down period, Transformer power Introduction:

AISI | Electric Arc Furnace Steelmaking

Electric Arc Furnace Steelmaking By Jeremy A T Jones, Nupro Corporation continued Furnace charging Melting Refining De-slagging Tapping Furnace turn-around Top Refining Refining operations in the electric arc furnace have traditionally involved the removal of phosphorus, sulfur, aluminum, silicon, manganese and carbon from the steel

General Ladle Maintenance Manual - moderneq

installation, operation, maintenance, curing and preheating of lining Failure to comply may result in explosion; which can cause death, severe personal injury, and/or equipment damage NOTE: If your ladle is equipped with a gearbox, skip Steps 4 - 9 and proceed with Step 10 Step 4: Before the ladle is filled with molten metal, place the

INDUCTION FURNACE VERSUS ELECTRIC ARC FURNACE IN

- Power on control during de-slagging operation - Ensuring full crucible before tapping - Minimum holding time - Proper scheduling of furnace - Scrap quality Proper scheduling of furnace is reported on figure 4 (IF-B) Three induction furnaces are in cycle in order to provide tap to tap time per each ladle in 45 to 50 minutes

Basic oxygen steelmaking - Wikipedia

Basic oxygen steelmaking (BOS, BOP, BOF, or OSM), also known as Linz–Donawitz-steelmaking or the oxygen converter process is a method of primary steelmaking in …

EXPLORING THE DESIGN SET POINTS OF REFINING …

The ladle furnace is one of the key unit operations for carrying out deoxidation and desulfurization to maintain the levels of oxygen and sulfur within a tolerable limit Deoxidation reaction during refining lead to formation of a number of which are deleterious in nature and should be removed The eff ectiveness of the ladle operation

Review of Our Investigations on Ladle Furnace

ladle cover, an approximate inert atmosphere is maintained above the molten steel bath 2 Flow and Thermal Modeling of Ladle Furnace In phase 1, mathematical modeling of fluid flow and heat transfer in ladle furnace was undertaken Details are available in the original publications [1, 2] A two-di-mensional model (axial and radial) was

Melting of large steel casting parts in the induction furnace

ready for pouring directly in the steelworks at the ladle furnace and in a further sequence in the RH process Fig 3 shows the pouring from a 150 t-ladle in the foundry Route 2: Here, according to pouring order, 15 to 50 t Simple and automatable operation

(PDF) Clean Steel Practices in Steelmaking Operations

ladle furnace and cast the liquid steel in a continuous caster Residual de-oxidation products such as alumina leads to formation of cracks and fatigue problems

Ladle Metallurgy | ispatguru

Ladle furnace A ladle furnace is used to relieve the primary process of steel making of many of the secondary refining operations The main functions of a ladle furnace are as follows Reheating of liquid steel by electric power which is conducted by graphite electrodes Homogenization of steel temperature and chemistry through inert gas rinsing

Neural Network Thermal Model of a Ladle Furnace

made in a ladle furnace, is the use of electric arcs to heat the steel Although the ladle furnace was initially developed to leave LD converter with primary refining and heating, the ladle furnace proved to have additional advantages in terms of productivity, quality and cost reduction, which has made it more and more necessary in the steel

INDUCTION FURNACE VERSUS ELECTRIC ARC FURNACE IN

- Power on control during de-slagging operation - Ensuring full crucible before tapping - Minimum holding time - Proper scheduling of furnace - Scrap quality Proper scheduling of furnace is reported on figure 4 (IF-B) Three induction furnaces are in cycle in order to provide tap to tap time per each ladle in 45 to 50 minutes

The history and development of the - SciELO

a successful blast furnace operation with similar ore (106% TiO2 versus 126% TiO2 in Highveld ore) is run by Panzhihua Iron and Steel in China2 They do, however, blend their basic oxygen furnaces, two ladle furnaces, and four continuous casting machines The steel plant has the ability to produce slabs, blooms, or billets at a typical

Innovation in Steel Ladle Life to 157 Heats at Rourkela

refractory dictates the availability of steel ladles in operation C Bottom In SMS-II, the liquid steel is tapped from a 150T converter into the steel ladle from a height of around 8m The impact of the steel on the ladle bottom causes erosion in the impact area With the improvement in ladle life this has become an area of concern

Electromagnetic stirring for ladle furnace operation

Stirring can be customized to match the needs of different ladle furnace process steps and is characterized by reliable and safe operation, precise logistics and optimum conditions for reproducible production of high-quality steel

Induction Furnace - A Review - Engg Journals

Combustion furnaces and induction furnaces produce heat in two entirely different waysIn a combustion furnace, heat is created by burning a fuel such as coke, oil or natural gas The burning fuel brings the interior temperature of the furnace above the melting point of the charge material placed inside This heats the surface of

Plasma Ladle Furnace

Plasma ladle furnace — alternative or additional refining for high specification grades based ladle furnace operation But for special purposes like the addition of electrically non-conductive synthetic Plasma Ladle Furnacepdf Created Date:

The Making of Iron & Steel - SEAISI

furnace However, if fine ore ere to be used as feed to a blast furnace its powdery nature would restrictw the passage of the blast air up through the furnace, limiting its permeability The problem of using the fines is overcome by agglomerating the ore into sinter or pellets

Maximizing steel productivity through technology and

Maximizing steel productivity through technology and service leadership NORTH AMERICA Toll Free Number in USA and Canada Maximizing Steel Productivity Through Technology and Service Leadership The National Carbon Company, founded in 1886, later became the •Ladle furnace operation •Electrical principles •Chemical energy

Complete solutions for quality steel - TENOVA

process technologies in Canada, and operations offices in China and Russia, it is a one-stop shop for the requirements of the steel industry and upstream lF the ladle Furnace lF is the fundamental secondary metallurgy solution for improved productivity, fiexibility and uality

Advanced Melting Technologies: echnologies

implement advanced technologies that involve replacing the entire furnace, even if they offer significant energy savings The prime criterion for the commercial acceptance of new advanced melting technologies is that they must not be capital intensive for installation

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