0086-21-58386256
Direct reduction of garnierits ore for production of ferro-nickel with a rotary kiln at Nippon Yakin Kogyo Co., Ltd., Oheyama Works. Int. J. Miner. Process., 19: 173-187. During World War II, the Nippon Yakin Kogyo Co., Ltd. produced sponge iron with the Krupp- Renn process at the OheyAmA Works from laterite ore mined at the nearby OheyRma Mine.
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.
The invention relates to a method for producing ferronickel granules from nickel ore, in particular to a method that nickeliferous laterite ore is directly reduced to produce ferronickel granules in a rotary kiln, belonging to the technical field of metallurgy and chemical industry. The method comprises the following steps: nickeliferous laterite ore is crushed and milled, then carbonaceous ...
processes. This flexibility of the rotary kiln as compared with other reactors was one of the main reasons for our decision in favour of this device. I would like to mention that since 1930 Lurgi has been using this type of rotary kiln for the magnetizing roasting of haemetite iron ores, for the reduction of nickel ores…
The process of direct reduction . The process of direct reduction is carried out in a rotary kiln where the operating temperatures are maintained in a range from 1,000 deg C to 1,100 deg C. The product of the kiln (DRI and char mix) is then cooled in a rotary cooler with external water cooling system.
Direct Nickel has developed a game changing pro cess for extracting nickel from laterite deposits. It will position Direct Nickel as one of the lowest cash cost producers in the global nickel industry in the next 5 years. The Process offers unparalleled co st efficiency, capital savi ngs and environmental benefits.
DRI production. Direct reduction of iron is the removal of oxygen from iron ore or other iron bearing materials in the solid state, i.e. without melting, as in the blast furnace. The reducing agents are carbon monoxide and hydrogen, coming from reformed natural gas, syngas or coal. Iron ore is used mostly in pellet and/or lumpy form.
We claim 1. In the countercurrent fuel fired rotary kiln process for selectively reducing metal values from the group consisting of nickel, cobalt and copper contained in a lateritic ore wherein ore fed to the rotary kiln is passed successively through a preheat zone and through a reduction zone, and reduced ore is discharged from said kiln, the improvement for maintaining within the reduction ...
Process Description R&D Trends. In a direct reduction process, lump iron oxide pellets and/or lump iron ore, are reduced (oxygen removed) by a reducing gas, producing direct reduced iron (DRI). If the cooling stage is omitted, the DRI can be immediately briquetted into hot briquetted iron (HBI).
The process principles are the basis for numerous rotary kiln plants and still represent the dominant technology for the direct reduction of lump ore or pellets using coal. Operates with the widest range of iron-bearing materials, such as pellets, lump ore, beach sand, ilmenite and also iron ore …
Study of Nickeliferrous Laterite Reduction MacSphere McMaster . pyrometallurgy or can be used to produce ferronickel by pyrometallurgy The major First the ore is put into a rotary kiln or vertical shaft bound water it is then charged directly into electric furnace and subjected to reduction When studying garnierite samples Caron 27j found that when heated in a reducing gas the
direct reduction process of nickel ores using rotary kiln as the main equipm Rotary kiln - Wikipedia Rotary kiln (rust colored horizontal tube at right) at a Wyoming cement plant General layout of a direct fired countercurrent rotary kiln used in .
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. Thermodynamic analysis indicates that the …
Conomic. Direct reduction of iron ore by one or more processes un- der study by …. ore in a vertical shaft furnace, a rotary or tunnel kiln, or other types of hearth or grate furnaces to … and ores containing titanium, nickel, and other metals can be treated. Melting Behavior of Siliceous Nickel Ore in a Rotary Kiln to …. – J-Stage.