2.3 Direct reduction of laterite nickel ore in industrial scale. Most laterite nickel ore processing is carried out using Elkem process. The Elkem process uses Rotary Kiln and Electric Furnace (RKEF) to reduce and smelt laterite nickel ore. Commercialization of Elkem process itself began with the development of a pilot plant in 1953–1954.
The increasing demand for stainless steel and the scarcity of sulfide nickel ore affect the increase of laterite nickel ore processing. One of the processes that has been proven can be applied to process laterite nickel ore is direct reduction. In the direct reduction, the reduction atmosphere was adjusted by controlling the volume of CO and CO2 from carbon source …
DRI, nickel and iron oresDangerous solid cargoes in bulk DRI, nickel and iron ores A selection of articles previously published by Gard AS.Pellets for Direct ReductionTable of ContentsProperties and Quality DemandsMetallurgical Test MethodsLKAB Pellets for Direct Reduction The iron ores mined by LKAB in the north of Sweden have excellent beneficiation properti This gives …
Nickel laterite ores are reduced by carbon monoxide before an ammoniacal leach. Nickel oxide reduction reactions are simple one-step reactions, as follows: (1.22) N i O s + H 2 g or C O g = N i s + H 2 O g or C O 2 g Both reactions have negative Gibbs free energy values.
Keywords: laterite nickel ore, selective reduction, direct reduction, additives 1. Nickel General Nickel is an important alloying metal with widerange application in the industry.1) Nickel is one of the most important strategic metals which is widely applied to stainless steel, electroplating, catalyst, and petrochemical
Direct Reduction Of Nickel Laterite Limonitic Ore Using A Coal-Dolomite Mixture Bed And NA 2 SO 4 as A Selective Agent Dr. A.K.S.Ansari, Dr. K.V.N.S. Rao 1(Mechanical Engineering, Gandhi Engineering College, Bhubaneswar) 2(Mechanical Engineering, Gandhi Engineering College, Bhubaneswar) ABSTRACT Nickel finds a wide industrial application.
The Midrex Direct Reduction process is based upon a low pressure, moving bed shaft furnace where the reducing gas or syngas moves counter-current to the lumpiron oxide ore or iron oxide pellet solids in the bed. The reducing gas is producedfrom reforming of natural gas using two nickel based catalyst types and one inert ceramic support ...
Therefore, in this work, the selective reduction of saprolite and limonite was carried out to reveal the effect of lateritic nickel ore basicity (MgO/SiO 2 ratio) on phase transformation and microstructure of reduced nickel ore. The raw materials, such as nickel ore, bituminous coal, and sodium sulfate, were crushed into −100 mesh.
One of the processes that has been proven can be applied to process laterite nickel ore is direct reduction. In the direct reduction, the reduction atmosphere was adjusted by controlling the volume of CO and CO 2 from carbon source materials, such as coal, charcoal, and green cokes.
processing, laterite nickel ore processing requires higherprocessing energy through smelting.Therefore, a novel method to process laterite nickel ore using lower energy is needed. The novel method is done via direct reduction and magnetic separation. In laterite nickel processing by direct
Laterite Nickel Ore Rotary Kiln/Rotary kiln- GroupApplication field : Large laterite nickel ore roasting reduction rotary kiln is one of the key equipment of the laterite kiln smelting processThe ore dried into laterite kiln,kiln heated to 800 celsius after the removal of water surface of ore and water of crystallization,and iron,nickel and cobalt oxide reduction in ores,into the furnace ...
A coal-based direct reduction process was used to recover the ferronickel from low-grade nickel laterite ore. The effects of basicity on the compressive strength, metallization rate, microstructure, and reduction characteristics of carbon-bearing nickel laterite ore pellets were investigated.
Nickel laterite ores are reduced by carbon monoxide before an ammoniacal leach. Nickel oxide reduction reactions are simple one-step reactions, as follows: (1.22) ... or via direct reduction of iron ore in solid form using natural gas. The sponge iron formed in the direct reduction process is then melted in an electric arc furnace.
Nickel finds a wide industrial application. It is obtained through extraction from nickel-containing ores. The metal extraction using a lateritic nickel ore becomes an important alternative because of nickel sulphide ore reserves decrease. This study aims to determine the coal to dolomite mass ratio that can produce ferronickel products of high nickel recovery, content, and selectivity.
The ore and coal as reductant were ground to obtain the grain size of less than 0.25 mm and 0.425 mm, respectively. Both ground laterite ore and coal were mixed, agglomerated in the form of...
Direct reduction of low grade nickel laterite ore to produce ferronickel using isothermal – temperature gradient January 2017 AIP Conference Proceedings 1805(1):040003
A coal-based direct reduction process was used to reduce the nickel laterite ore under a constant C: O ratio (1.2: 1) and reduction time (90 min). The effect of basicity and reduction temperature on microstructure and reduction characteristics and of carbon-bearing nickel laterite ore pellets was investigated.