Abstract: Provided is a method for producing pellets by which, when nickel oxide ore is being pelletized and smelted to produce ferronickel, which is an iron-nickel alloy, it is possible to allow the smelting reaction to proceed effectively. A method for producing pellets according to the present invention is for producing pellets which are used in producing iron-nickel alloy and which are produced by mixing raw materials including nickel oxide ore and agglomerating the resulting mixture, wherein the method comprises: a mixing step S11 for mixing at least nickel oxide ore, a carbonaceous reducing agent, and iron oxide to generate a mixture; and a pellet formation step S12 for agglomerating the resulting mixture and forming pellets. In the mixing step S11, the mixture is generated such that the total weight of nickel and iron accounts for 30 wt % or more of the total weight of the pellets formed.

Abstract: The present invention describes an advantageous and effective streamlined process for the production of iron ore pellets, the green pellets replacing the burnt pellets for covering the metallic surface in “travelling grate” furnace during the burning step, the process comprising at least some or all of the steps of grinding the iron ore; filtering the crushed iron ore; mixing the filtered iron ore with at least one binder; pelletizing the mixture; drying the green pellets; transferring the pellets to the side and bottom grids of a “travelling grate” furnace equipment and screening the burnt iron ore pellets. An optimized process for the production of iron ore pellets is provided that is innovative, efficient and economical when compared to currently known processes.

Abstract: A slurry of particulate ore material is concentrated to form a smeltable concentrate on a re-concentrating mineral table arranged to separate concentrate ore at a concentrate discharge from middlings and tailings. The table is set such that the concentrate forms a smeltable concentrate and thus at least the middlings contain significant quantities of the concentrate to be collected. The ore to be concentrated is fed to a bin in batch form and carried from the bin by a screw through a screen to the table. The table is operated in processing of the batch for a first period of time during which both the middlings and tailings are returned to the feeder for recirculation to the table. The period of time is such that the material is circulated over the table repeatedly to separate out the concentrate. After the first period, for a second period, the table is operated while directing at least the tailings and possibly the middlings to discard so as to reduce the batch sufficiently to receive the next batch.

Abstract: A traveling gate system for treating mineral ores that incorporate a cooling zone intermediate to heating zones to enable the use of a longer gate chain and additional heating zones to further refine the heat treating process of a traveling gate system. In the cooling zone the gas is forced upward to initially contact the gate chain and cool it and prevent the chain parts from exceeding their high temperature limit. Appropriate gases such as air can be selected for the cooling gas to further enhance the treatment of the material being processed on the gate chain.

Abstract: The present invention relates to a method for making sponge iron briquettes from fine ore with a maximum grain size of less than 2 mm, preferably less than 0.5 mm, wherein hot fine ore is fed to a roller press and is briquetted by the roller press to form sponge iron briquettes. Apart from briquettes, fine ore which is compacted in the spaces of briquette pockets of the roller press, as well as fines in dust form are produced during briquetting. These components are designated as returns and separated from the sponge iron briquettes. The returns are then fed to the fine ferrous ore prior to briquetting. The processing of fine ore has so far entailed great problems in the technical field. The invention suggests that the returns be directly fed to a conveyor system after having been separated from the sponge iron briquettes and that the returns which are still hot be fed by the conveyor system substantially evenly and continuously to the hot fine ore to be still briquetted.

Abstract: The subject invention relates to method for briquetting fines and ultrafines comprising mixing the fines and ultrafines on a continuous basis with a binder system having low viscosity of up to about 200 cps and at least 50% solids, such that the resulting briquette contains less than about 3% binder by weight of the briquette.

Abstract: Composite pieces of high density and strength are made continuously from mixtures of fine particles of bituminous or subbituminous or lignite coals and particles of carbon reducible oxides. The particles are mixed with water, compressed to squeeze out some of the water to obtain single bodies which are heat processed lying on a traveling grate on which the composites undergo drying, pyrolyzing, carbonizing and cooling.A modification includes mixing in with the coal material(s) listed above, coke fines or char or anthracite coal. The carbon reducible oxides utilized are such as the oxidic ores of Fe, Mn, Cr and quartzite in recited important proportions that make the formed composite bodies usable in a submerged arc furnace or in a low shaft blast furnace or in an open hearth to produce desired intermediate or end metallic products such as ferromanganese, Fe-Cr base metal for stainless steel, iron, ferro-alloys or silicon.

Abstract: The subject invention relates to method for briquetting fines and ultrafines comprising mixing the fines and ultrafines on a continuous basis with a binder system having low viscosity of up to about 200 cps and at least 50% solids, such that the resulting briquette contains less than about 3% binder by weight of the briquette.

Abstract: A process and apparatus are described for agglomerating metal-containing fine sized particles of metallurgical waste materials continuously by means of a combustible agglomerating agent. The process and apparatus may be adapted to dust and fine particles of different origins and having any particular particle size range and bulk specific gravity. The agglomerates are obtained by feeding the dust or fine sized particles and a combustible agglomerating agent to a continuous mixer, then to a heated rotatable kiln. The agglomerates are subsequently allowed to fall onto one or more conveyor belts, arranged in sequence. The agglomerates on the conveyor belts may be cooled, either by water or compressed air jets impinging upon them, or by cooling the belt surfaces on which the agglomerates are carried. The agglomerating agent may be a low melting point hydrocarbon such as wax, tar, pitch, or the hydrocarbon may be emulsified with water to form an emulsion and then mixed with the particles.

Abstract: A method for manufacturing agglomerates of sintered pellets comprises the steps of mixing and pelletizing fine iron ore, flux, binder and return fines, coating pelletized materials, charging the green pellets into a sintering machine, drying charged green pellets in a drying furnace and igniting the pellets in an ignition furnace, sintering the green pellets in the sintering machine, and measuring a noise level by the use of a noise sensor arranged on a sintering bed and controlling a sintering operation on the basis of the noise level.The noise level during igniting of the green pellets is measured by the use of noise sensors arranged on an ignition furnace and permeability of the green pellets are controlled on the basis of the noise level.The noise level is measured by the use of plurality of noise sensors arranged in the longitudinal direction of the sintering machine followed by the ignition furnace and the burn through point is controlled on the basis of the noise level.

Abstract: In an apparatus for feeding a sintering raw mix, a plurality of bars downwardly sloped in a falling direction of the sintering raw mix onto a pallet of a sintering apparatus is provided so that the falling direction of the raw mix is opposite to the advancing direction of the pallet, a screen is formed by rotatably supporting the bars, and the upper ends of the bars are connected to a rotating drive(s).