hot metal desulphurisation process

Trace Species Investigations for Integrated Steel Plants

The investigated process is consisting of the major process steps of a sinter plant two blast furnaces with hot blast stoves systems and a hot metal desulphurisation ladle The oxidic ore is charged together with additives and coke breeze after mixing to the sinter plant In the sinter process the mixture is agglomerated by ignition of...

Desulphurisation of Hisarna hot metal a comparisson study

Because of that desulphurisation of the HIsarna hot metal is one of the challenges to ensure its use for steelmaking Plant data from different Tata Steel plants in Europe and India was used to study the effect of carbon silicon phosphorus manganese titanium chromiumand temperature on hot metal desulphurisation by magnesium lime co-injection...

Metallurgical Injection Technology

the hot metal desulphurisation process is required Selection of the optimum process is performed by a metallurgical process computer The effectiveness of the process is therefore decisively determined by the programmed process knowhow Due to the large number of plants already supplied...

Metallurgical Injection Technologies Metal Challenge

Hot metal desulphurisation plants Precision work for every requirement In modern integrated metallurgical plants producing high grade steels the hot metal desulphurisation takes place outside the blast furnace The desulphurisation process precedes the steel treatment in the converter...

A Straightforward Mathematical Model of Hot Metal

A straightforward kinetic model for the hot metal desulphurization process is presented The model contains some of the most important parameters and variables that govern the process The inputs outputs and parameters of a desulphurization program employed at industry are discussed The model is able to cope with different injection policies of desulphurizers such as mono- injection co...

Initial Slag in Primary Desulphurisation of Hot Metal

In the theoretical part of the thesis the most common methods for desulphurisation of hot metal are presented as well as the main reactions and reaction mechanisms of the CaO-based reagent injection The desulphurisation of hot metal occurs mainly as a reagent-metal reaction but in this thesis the emphasis is on the slag-metal reaction...

Hot Metal Pretreatment can Lower Impurity Content

Hot metal pretreatment is a process which is performed after the tapping of a blast furnace BF and before decarburisation in a basic oxygen furnace BOF In most cases this process lowers the impurity content of hot metal Hot metal desulphurisation de-siliconisation and de-phosphorisation are processes that are included in this category...

Operational Costs of Hot Metal Desulphurization Processes

Iron in hot metal is trapped in the slag and the slag sometimes contains around 50 of iron Gadsdon Han 2010 33 Temperature Loss In the Basic Oxygen Furnace BOF the hot metal is converted into steel using a supersonic jet of gaseous oxygen The sensible heat of the hot metal represents around 50 of the energy input to the furnace...

Delft University of Technology Effect of graphite on hot

magnesium-lime co-injection process is the state-of-the-art hot metal desulphurisation HMD method Typically when the hot metal is tapped from the blast furnace it is not yet saturated with carbon This is because the dissolution of carbon in hot metal at the blast furnace is controlled by kinetics rather than thermodynamics 1...

Hot metal desulphurisation in torpedo ladles

More than 50 plants are desulphurising hot metal in torpedo and transfer ladles with capacities of 35 to 350 tonn Polysius injection systems can be used for all commercially standard desulphurisation reagents such as lime calcium carbide and magnesium using the mono- co-...

New way to cut hot metal sulphur

Sep 01 2013 0183 32 The new process is particularly suitable for treating large batch Simetal HM KR Desulf adds a stirrer-based solution to the current Siemens portfolio of desulphurisation plants that run on the injection process Due to the use of sulphur-containing fuels in the blast-furnace process hot metal always contains a certain amount of sulphur...

Dephosphorization

Jan 05 2012 0183 32 Typical hot metal desiliconization treatment processes are shown in Figure 1345 Because desiliconization readily occurs thermodynamically one of the popular processes is the BF runner method In this process Fe oxide is added on the hot metal in a BF runner or is added when the metal flows from the main runner to a tilting runner...

Steel and hot metal desulphurisation

Hot metal desulphurisation as basis for various production processes Our innovative hot metal desulphurisation reagents are used in all areas of metal processing industry Especially the production of high performance steel grades requires cost and time saving reagents...

Hot Metal Desulphurisation SKW Metallurgie

Hot metal desulphurisation serves to relieve downstream metallurgical processes from desulphurisation work Being a market leader in Europe SKW Stahl-Metallurgie offers customers specific problem solutions based on the desulphurisation agent components Calcium Carbide Magnesium as well as Lime...

hot metal desulphurisation process

Hot metal desulphurisation stations Hot metal desulphurisation HMD is effected by a powder deep injection system with refractory lined immersion lance s The unit consists of one or more treatment chambers withCharacteristics of the design are mono- co- or triple-injection of desulphurisation agents THE PROCESS Read more...

DESULPHURIZATION OF STEEL AND PIG IRON

crease the metal desulphurisation in course of the metal oxidisingrefining applying the chemical composition of metal the principal possibility of the desulphurisation process control lays though in rather limited extend in the control of the slag chemical composition Basic oxi-dising slag having common composition contain always...

Lowering iron losses during slag removal in hot metal

To lower the iron losses of the hot metal desulphurisation HMD process slag modifiers can be added to the slag Slag modifiers decrease the apparent...

Hot metal treatment SMS group

In order to ensure the efficiency and flexibility of hot metal desulphurisation desulphurisation agents are injected in mono- or co-injection process For the co-injection process a plant must have different hardware configurations...

Efficient Economical Ecological Hot Metal

for hot metal desulphurisation externally Ladle based hot metal desulphurization is done with the help of reagents like magnesium carbide based compounds and lime Different types of External Desulphurization techniques are used nowadays and are frequently adopted by the steel makers Some of the important techniques are mono-injection co-...

SLAG AND IRON DROPLET FORMATION DURING

Desulphurisation agents eg lime calcium carbide and magnesium are injected by sub-merged lances into the metal bath in modern hot metal treatment Process vessels can be torpedo cars or hot metal ladl The generated slag is skimmed off after the injection...

High Efficiency Hot Metal Desulfurization by Enhancing

Hot metal desulfurization with mechanical stirring is a process which accelerates the reaction between hot metal and desulfurization flux by immersing or inserting an impeller made of refractory material in hot metal and stirring the bath by rotating the impeller causing entrainment of the added desulfurization flux in hot metal...

Sulphur removal in ironmaking and oxygen steelmaking

Sulphur removal in the ironmaking and oxygen steelmaking process is reviewed A sulphur balance is made for the steelmaking process of Tata Steel IJmuiden the Netherlands There are four stages where sulphur can be removed in the blast furnace BF during hot metal HM pretreatment in the...

Optimisation of hot metal desulphurisation slag in the CaO

In this study the effect of the hot metal desulphurisation slag chemistry on the separation of metal from slag was investigated for the varying hot metal desulphurisation conditions eg BF slag carryover the amount of CaO/Mg injected hot metal temperature etc via theoretical calculation and laboratory experiments...

PDF RECENT PROGRESS IN INTERNAL HOT METAL

injection process for internal hot metal desulphurisation The develo pment started with the mono -injection of magnesium blends in the mid-80ies followed by the co-injection of magnesium a nd...

Mathematical Model of Hot Metal Desulfurization by Powder

Jun 30 2011 0183 32 Although there have been a numerous number of studies on mathematical model of hot metal desulfurization by deep injection of calcium carbide the research field as a whole is not well integrated This paper presents a model that takes into account the kinetics thermodynamics and transport processes to predict the sulfur levels in the hot metal throughout a blow...

Tata Steel Capability Development

Desulphurization of hot metal is an important step in the steel production process Sulphur in steel negatively influences both mechanical and corrosion properties of the steel and causes of hot shortness A major source of sulphur in the hot metal is from the coal used in the blast furnace...

Effect of magnesium injection process on hot metal

To solve the technical problems of hot metal desulfurization by injecting magnesium particulate a new method of hot metal desulfurization by bottom-blowing magnesium vapor combined with mechanical agitation was put forward The effects of three different desulfurization processes on the desulfurization efficiency were studied in view of thermodynamics and kinetics It was found that the...

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