موقعك الحالي:صفحة رئيسية>المنتجات
The basis of the direct reduction process is that solid sponge iron is produced by removing oxygen from the ore in a shaft furnace, rotary kiln furnace or fluidised bed. Sponge iron can be produced in the form of Direct Reduced Iron (DRI), Hot Briquetted Iron (HBI) and Cold Briquetted Iron (CBI); also Low Reduced Iron (LRI), which is pre-reduced iron ore with a reduction and metallisation degree lower than that for
Read More
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. This research aims to analyze the effect of reducing agents type on nickel limonitic nickel briquettes on Ni and Fe content
Read More
2014-8-5 Modelling and optimization of a rotary kiln direct reduction process 55 Figure 3. Kiln temperature distribution for the base case The feed material (bed) enters the kiln at ambient temperature and rapidly heats up due to the hot gas in the freeboard. At about 10 m into the kiln the volatiles in the coal are released, resulting in a local temperature spike due to combustion of the volatiles in the
Read More
ore using lower energy is needed. The novel method is done via direct reduction and magnetic separation. In laterite nickel processing by direct reduction, the challenges are to conduct selective reduction of nickel and to let iron unreduced. The addition of additive in the direct reduction process is needed to achieve this selective reduction.
Read More
2020-9-1 The optimal reduction temperature of the rotary kiln should be controlled at 1150 °C to 1250 °C with pellet basicity of 0.56 to prevent the ring-forming phenomenon. Under optimum process conditions, the metallized pellets mainly consist of ferronickel ([Fe,Ni]), forsterite ferroan (Mg 1.38 Fe 0.61 Ca 0.01 SiO 4 ), and pigeonite ((Ca 0.06 Mg 0.68 Fe 0.26 )SiO 3 ).
Read More
2015-6-11 rotary kiln. This is determined by (i) the maximum flow rate of the proposed burden through a kiln, and (ii) the residence time at temperatures that would allow sufficient reduction to take place. A calculation method was developed that allows for the prediction of the bed profile and residence time in a rotary kiln. The method is based on the principle of granular movement in a kiln as described by
Read More
2019-5-10 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 ...
Read More
Direct reduction of garnierite ore for production of ferro-nickel with a rotary kiln at Nippon Yakin Kogyo Co., Ltd., Oheyama Works Tetsuya Watanabe, Sadao
Read More
2011-1-6 Kobe Steel has developed coal-based direct reduction (DR) technologies, the FASTMET, FASTMELT and ITmk3 processes, which reduce carbon composite agglomerates (pellets or briquettes) on the hearth of a rotary hearth furnace (RHF). This paper outlines the features of each process, status of technical development and commercialization.
Read More
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.
Read More
Rotary Kiln Is the Commonly Used Mining Machine Essay - 433 . 2012516- Mobile Rotary Kiln used for nickel lateritic ores Essay .form. Dehydration is a minimum and some pre-reduction of the ore in a rotary ki.
Read More
A Pilot-plant Scale Test of Coal-based Rotary Kiln Direct Reduction ... A magnetic concentrate — Ferronickel powder — with 86.9% iron and 8.0% nickel ...
Read More
A pilot kiln was constructed and operated as described in the Helfrich patent with the preheat carried to temperatures as high as 1,800° F followed by the under bed admission of hydrocarbon fuel for reforming and then ore reduction at several different steady state reaction temperatures which in one test was below the 1,800° F preheat ...
Read More
Test Plant Design • Plant was designed to treat 1 tonne per day of laterite ore • Successfully treated a range of ores from Indones ia – 100% saprolite, 25% limonite/75% saprolite, and 50% limonite/50% saprolite – and a 50% lim onite/50% saprolite ore blend from Brazil
Read More2019-5-10 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 ...
Read More
2014-5-15 Pilot scale test of producing nickel concentrate from low-grade saprolitic laterite by direct reduction-magnetic separation ... was conducted by using pelletizing, rotary kiln reduction and magnetic separation process on a semi industrial scale, and the effects of reduction duration, mass ratio of coal to pellets(C/P), the types of magnetic ...
Read More
nickel, which is mostly used as a nickel source for stainless steel. The calcination to around 1000°C by the rotary kiln provides drying and pre-reduction of ores, the calcinated product being subsequently charged into the electric furnace to be melt reduced. The slag and metal are tapped at around 1600 and 1400°C, respectively. On the other ...
Read More
Rotary kilns work by processing material in a rotating drum at high temperatures for a specified retention time to cause a physical change or chemical reaction in the material being processed. The kiln is set at a slight slope to assist in moving material through the drum. Direct-fired kilns utilize direct contact between the material and ...
Read More
2014-5-5 promote the reduction of nickel/iron oxide and nickel/ iron silicate. 2.2Ex p erimntalocdu T hepr ocdurof ts i wnFg. 2.Ra laterite ores was dried through a rotary kiln with a inner diameter of 800 mm and a length of 10000 mm, with a moisture content around 10%
Read More
2012-2-7 The selective reduction ratio was high, 7.4 and 6.1 for conditions 1 and 2 respectively, where this ratio is defined as the nickel recovery to metal divided by the iron recovery to metal. Example 4 - 500kW test: Rotary kiln calciner dust smelting
Read MoreRotary Kiln Is the Commonly Used Mining Machine Essay - 433 . 2012516- Mobile Rotary Kiln used for nickel lateritic ores Essay .form. Dehydration is a minimum and some pre-reduction of the ore in a rotary ki.
Read MoreA Pilot-plant Scale Test of Coal-based Rotary Kiln Direct Reduction ... A magnetic concentrate — Ferronickel powder — with 86.9% iron and 8.0% nickel ...
Read More2019-5-10 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 ...
Read More
Pilot scale test of producing nickel concentrate from low-grade saprolitic laterite by direct reduction-magnetic separation ZHENG Guo ... 18.47% Fe, 10.61% MgO and 42.27% SiO 2, was conducted by using pelletizing, rotary kiln reduction and magnetic , mass ...
Read More
2020-3-16 metallurgical process is the rotary kiln-electric furnace reduction smelting process, which is a pyrometallurgical process widely used in laterite nickel ore smelters. When handling laterite nickel ores with high copper and cobalt contents, a wet process is more conducive to the comprehensive recovery of various valuable metals and the
Read MoreRotary kilns work by processing material in a rotating drum at high temperatures for a specified retention time to cause a physical change or chemical reaction in the material being processed. The kiln is set at a slight slope to assist in moving material through the drum. Direct-fired kilns utilize direct contact between the material and ...
Read More
2012-1-5 derable number of full-scale rotary kiln instal-lations have been successfully delivered in the past (4 kilns, 4.2 m dia., 110 m long, for the Essen-Borbeck Renn plant; 2 kilns, 4.2 m dia., 90 m long and 1 kiln, 5.2 m dia., 90 m long, for the pre-reduction of nickel ores at Larymna, Greece; 1 kiln, 4.2 m dia., 60 m long, for a Waelz
Read More
2020-5-6 nickel [2]. INCO carried out test research work at a Laboratory and small pilot plant scale on Cu and Ni segregation, but the process was not commercialized for nickel production. Xstrata recently carried out laboratory scale test work on segregation roasting of laterite (Saprolite) ore
Read More
2012-2-7 Nickel laterite ores have high moisture contents (typically up to 40%) as well as chemically bonded water in the hydroxide form. Dehydration as a minimum, and some pre-reduction of the ore in a rotary kiln is used to optimize the utilization of electric energy for smelting operations in the conventional submerged-arc furnace process.
Read More
Reduction of the pellets in the reduction zone 38 in the manner described, after their having been strengthened and heat hardened in the induration zone 34, enables the pellets 10 to further withstand the tumbling and advancing action of the rotary kiln throughout the reduction process in the reduction
Read More
الصين -تشنغ تشو -المنطقة الوطنية للتنمية الصناعية للتكنولوجيا المتطورة، جادة العلوم رقم 169.
الاتصال: 0371-86549132.