USA - Ported rotary kiln process for direct ...

Jul 11, 2018· The sticking phenomenon between molten slag and refractory is one of the crucial problems when preparing ferronickel from laterite ore using rotary hearth furnace or rotary kiln processes. This study aims to ameliorate sticking problems by using silicon dioxide (SiO2) to adjust the melting degree of the briquette during reduction roasting.

Completion of metallurgical test programme confirms ...

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 materials, such as coal ...

ROTARY KILNS - Thomasnet

Aug 15, 2012· direct reduction of iron ore from tunnel kiln process – Coal … laterite nickel ore kiln … rotary kiln, sponge iron etc. … Indonesia . On the Direct Reduction of Iron Ore in Rotary Kiln – [email protected] Lahiri, A K (1973) On the Direct Reduction of Iron Ore in Rotary Kiln. Get Price

Influence of Non-stoichiometric Serpentine in Saprolite Ni ...

rotary kilns increases by 40% in comparison to the industrial cases. Keywords: pre-reduction, iron-nickel, ore, rotary kiln, average, calcine, percentage. Introduction The metallurgical process in the new Foundry of the new Ferronikel in Drenas, is realized by a variety of ores both imported and local. A few types are used as fuel.

Preparation of ferronickel from nickel laterite via coal ...

A process is disclosed for prereducing metallic oxide and sulfide ores to a lower state of oxidation without passing through a liquid phase, at an accelerated rate. The ore particles are preheated to 1,800* or above. An unreformed hydrocarbon fuel such as natural gas (CH4) substantially free of any oxidizing agents is passed into a bed of such preheated ore particles to pyrolytically decompose ...

Modelling and optimization of a rotary kiln direct ...

To date, a pyrometallurgical method known as the rotary kiln–electric furnace (RKEF) process [13–14], has been applied to produce ferronickel from nickel laterite ore. The RKEF process involves calcination and pre-reduction at 800–1000 C for 4–6 h in a rotary kiln, followed by semlting

USA - Ported rotary kiln process for direct ...

metallurgical coke, and (4) direct production of crude steel, etc. Saprolite Ni-ore has been mainly smelted by Elkem process using an electric furnace. Whereas, an improved rotary-kiln process referred to as "Nippon Yakin Oheyama Process,"2) enables ferro-nickel to be produced by a nearly equivalent cost. However, it has the disadvantages ...

Rotary Kilns - FEECO International Inc.

Mar 11, 2016· The presentation gives features, properties and various details of direct reduced iron.

JOM World Nonferrous Smelter Survey, Part III: Nickel ...

during the reduction stage. Keywords: lateritic mineral, rotary kiln, nickel, direct reduction, particle size, linder reactor. Resumen Colombia posee mineral de níquel en las tierras altas de la región de San Jorge, al sur del departamento de Córdoba. El material extraído del área se procesa mediante calcinación y fusión en un horno ...

Effects of direct reduction process on the microstructure ...

the rotary kiln. Direct-fired rotary kilns can operate in either the co-current mode, where combustion gases and solids move in the same direction, or in the counter current mode, where the gases and solids move in opposition to each other. While all FEECO kilns are custom engineered around the material to be processed and the unique processing

Fines generation in kiln process of direct reduction

• ROTARY KILN ELECTRIC FURNACE • Drying and Crushing • Calcination and Reduction ... • In Jan 2014 Indonesia banned nickel laterite ore exports • Existing High Pressure Acid Leach (HPAL) and ferronickel processes are ... Direct Nickel has developed a game changing pro cess for extracting nickel from laterite deposits.

Direct Reduction of Limonitic Laterite Nickel Ore with ...

Rotary kilns (sometimes called calciners or rotary furnaces) are used for thermal treatment processes such as calcination, sintering, pyrolysis and firing, as well as for oxidation and reduction.These treatments can be applied to powders, granulates, suspensions and green bodies.A rotary kiln consists of a cylindrical, rotating body mounted between stationary material feed and outlet housings.

Factors Affecting the Increase in the Pre-reduction Scale ...

A series of laboratory tests designed to establish the suitability of the ore for rotary kiln ... (modified ASTM E279 test) Ore thermal analysis ... The nickel reduction in the kiln was lower than ...

Fines generation in kiln process of direct reduction

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. The results show that the metallization rate of iron and the compressive strength of metallized ...

process of iron reduction in tunel kin and rotary kiln

The ROTARY KILN HANDBOOK OPERATION | SIZING & DESIGN | CONSIDERATIONS | MAINTENANCE a product of Contents INTRO About FEECO 1 Intro to Rotary Kilns 3 ROTARY KILN OPERATION & PROCESSING How Rotary Kilns Work 5 Rotary Kiln Processes 8 SIZING & DESIGN Rotary Kiln Sizing & Design 11 Increasing Eficiency Through Customization 14 Thermal Testing 19 CONSIDERATIONS Direct …

Prospects for Coal-based Direct Reduction Process

ferrovanadium, nickel carbonate, nickel laterite, iron ore reduction, and spodumene (lithium) production. In this paper the direct reduction of iron ore to sponge iron is used as an example. The model incorporates a large number of variables covering, amongst others: feed properties and rates, combustion options, kiln

A Pilot-Plant Scale Test of Coal-Based Rotary Kiln Direct ...

ferrovanadium, nickel carbonate, nickel laterite, iron ore reduction, and spodumene (lithium) production. In this paper the direct reduction of iron ore to sponge iron is used as an example. The model incorporates a large number of variables covering, amongst others: feed properties and rates, combustion options, kiln

Modelling and optimization of a rotary kiln direct ...

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). As a result, the processes require about 12 hours of reduction

Modelling and optimization of a rotary kiln direct ...

Direct Reduction Studies : The rotary kiln process of direct reduction was simulated in the laboratory by conducting batch scale tests using Linder test apparatus. The equipment is an electrically heated horizontal reduction tube of size 160mm dia and 630mm length with a facility for rotation of the reduction tube at different speeds.

Direct reduced iron and production of DRI part 1 - YouTube

Calcining-Reduction The partially dry ore is calcined and reduced in slightly sloped rotary kilns (RKs). The exception is the Falcondo Smelter, where these process steps take place in rectangular section shaft fur-naces11 that are fed with partly dried ore as briquettes. In RKs, fuel is burned substoichio-metrically at the solids discharge end in

Direct Nickel Process – Breakthrough Technology

This study investigates the role of sulfur content of rotary kiln fuels on the composition of the calcine. The calcination-partial reduction experiments were conducted in a furnace at 900 °C for a 2-hour residence time. Various reducing gas mixtures representing combustion product of rotary kiln fuels (i.e., coal) were contacted with the ore.

Modelling and optimization of a rotary kiln direct ...

A Pilot‐Plant Scale Test of Coal‐Based Rotary Kiln Direct Reduction of Laterite Ore for Fe‐Ni Production. Guanghui Li. Search for more papers by this author. Junhao Liu. Search for more papers by this author. Mingjun Rao. E-mail address: [email protected] Search for more …