iron solid state reduction with coal

Reduction and Swelling of Fired Hematite Iron Ore Pellets ...

Seaton, Foster, and Velasco (1983), working on the reduction of hematite and magnetite iron ore pellets containing coal char, found catastrophic swelling in the temperature range ....

Iron Essential Chemical Industry

Manufacture of iron. Coke, a porous solid, provides carbon for the reduction reactions and is also the main fuel used in the furnace. It is made on site by heating coal to ca 1200 K in the absence of air for up to 20 hours in a battery of cokeovens. The residue is ....

Wrought iron Wikipedia

Wrought iron is a form of commercial iron containing less than % of carbon, less than % of impurities total of sulfur, phosphorus, silicon and manganese, and less than 2% slag by weight. Wrought iron is redshort or hot short if it contains sulfur in excess quantity. It has sufficient tenacity when cold, but cracks when bent or finished ......

Coal Base DRI Operation

Oct 22, 2017· Due to reduction of iron oxide of the Iron ore in the solid state, the porosity of the mass increases 5070%. Thus, the surface to volume ratio of the iron ore becomes very high, as a result of which reoxidation of DRI takes place at a faster rate. ROUGH SURFACE The ruptured surface of the DRI permits dust to accumulate and become solidly lodged....

STUDY OF REDUCTION BEHAVIOUR OF IRON ORE .

DRI(directly reduced iron) or sponge iron is a porous solidstate production of direct reduction process. This is produced in lump or pellet form. DRI is being used in steel making through various routes such as EAF( electric arc furnace) BOF( basic oxygen furnace), as it is very economical and...

EIA: India's steel industry dominated by electricbased ...

Direct reduction of iron removes oxygen from iron ore or other ironbearing materials in the solid state— without melting, as is done in a blast furnace. The reducing agents are carbon monoxide and hydrogen, coming from reformed natural gas, syngas or coal....

Solid state reduction of Panzhihua titanomagnetite ...

Jul 01, 2011· Graphical abstract This paper describes a new process of solid state reduction of Panzhihua titanomagnetite concentrates with pulverized coal. In this process, the titanomagnetite concentrates was preoxidized firstly and then reduced at different temperatures. Effect of different reduction parameters was investigated....

SolidState Metalized Reduction of MagnesiumRich Low ...

Apr 24, 2017· The solidstate metalized reduction of magnesiumrich lownickel oxide ore using coal as a reductant was studied based on thermodynamic analysis. The major constituent minerals of the ore were silicates and goethite. The former was the main nickelbearing mineral, and the latter was the main ironbearing mineral....

Resources Trend and Use of Direct Reduced Iron in ...

Direct reduction is a process for reducing iron ore in the solid state. It requires much less capital investment than the BF process and requires no coke. Therefore, DR plants have nbeen built mainly in oil and natural gas producing countries to supply raw iron for EAF processes. Particularly in the...

Direct Reduced Iron | Industrial Efficiency Technology ...

Direct Reduced Iron (DRI), also known as Sponge Iron, offers an alternative steel production route to BFBOF and ScrapEAF 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 Mexico....

sponge iron process

Jul 29, 2010· We are the largest producer of sponge iron using non coking coal as a reductant and and are having the largest coal based plant in the world. We shall discuss in detail all technical aspects of coal base sponge iron making with particular reference to control of important process parameters to achieve quality sponge iron in this august gathering....

Direct Reduced Iron – IspatGuru

Dec 14, 2013· Direct Reduced Iron. Direct reduced iron (DRI) is also known as sponge iron. It is produced by the reduction of iron ore (in the form of lumps or pellets) by either noncoking coal or a reducing gas produced by reforming of natural gas. The reducing gas can also be produced by the gasification of coal. The reducing gas is normally a mixture....

STUDY OF REDUCTION BEHAVIOUR OF IRON ORE .

STUDY OF REDUCTION BEHAVIOUR OF IRON ORE LUMPS BY COAL A ... LITERATURE REVIEW ON REDUCTION OF IRON ORE BY COAL AIMS AND OBJECTIVES OF THE PRESENT CHAPTER 2 PROXIMATE ANALYSIS OF COAL ... or sponge iron is a porous solidstate production of direct reduction process. This is produced in lump or pellet form....

Powder Metallurgy – Powder Processes (Solid State ...

There are many ways in which metals may be produced in powder form, comminution of solid metal precipitation from solution of a salt; thermal decomposition of a chemical compound; reduction of a compound, usually the oxide, in the solid state, electrodeposition, and the atomization of ....

SL/RN process Outotec

Heat is generated by the controlled combustion of volatiles from the coal and surplus CO from the charge. The reduction of iron oxides in the solid state is achieved at ....

Making Ferronickel from Laterite Nickel Ore by CoalBased ...

The main reason was as follows: 1) the reduction temperature of 656˚C 710˚C had not reached the temperature of rapid gasification reaction of carbon, so it was unable to realize the fully reduction of nickel oxide that only rely on solidphase reduction between laterite nickel ore and coal; 2) because the nickel and iron were present as isomorphous, even if the full reduction of NiO did not change its ....

Cost Effectiveness Analysis of HYL and Midrex DRI ...

Another alternative to hot molten iron making is the direct reduction method. In this method, iron is reduced in its solid state using either coal or natural gas as a fuel. One advantage of this method is that iron can be added as lumps, pellets, or fines, and if coal is ....

REDUCTION BEHAVIOUR OF FIRED IRON ORE PELLETS

8%. The pellets fired at 1100 C were treated for reduction studies in different types of coal. The degree of reduction of fired ironore pellets increased with increase in reduction temp and time up to the range studied. The degree of reduction of fired pellets was found to be increasing with increase in the reactivity of the coal....

Reduction in packed bed of iron ore and coal under one ...

Solidstate reduction of iron ore Þnes with coal as reductant is of interest in the development of several ironmaking processes, including the Ifcon Given the highly endothermic nature of carbon based reduction, and the low thermal conductivity of a packed bed of ore and coal, study of the kinetics of this type of process requires quantiÞcation of the rate of heat...

What is DIRECTLYREDUCED IRON? What does ... YouTube

Oct 12, 2017· Directreduced iron (DRI), also called sponge iron, is produced from the direct reduction of iron ore (in the form of lumps, pellets or fines) to iron by a reducing gas or elementary carbon ......