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7597873 Process and apparatus for the recovery of metal oxide particles  
A process for the recovery of metal oxides from a solution containing metallic salts by spray roasting of these solutions. The process is particularly suitable for spray roasting spent pickling...
7588741 Cyclical vacuum chlorination processes, including lithium extraction  
Cyclical batch processes for halogenation, such as chlorination, of minerals in a fixed bed using a plurality of cycles which include the steps of at least partially evacuating the bed, charging...
7571814 Method for separating metal values by exposing to microwave/millimeter wave energy  
Methods and apparatuses for separating metal values, such as nickel and nickel compounds, from mineral ores, including lateritic ores are disclosed. The method includes providing a mixture of...
6926752 Method for the stabilization of a fluidized bed in a roasting furnace  
This invention relates to a method for stabilizing a fluidized bed used in roasting by adjusting the oxygen content of the roasting gas in the bed. The fine-grained material for roasting is fed...
6770255 Process for chlorine recovery  
The specification discloses a process for recovering chlorine from a chlorinator waste. The process involves treating the chlorinator waste with oxygen in a fluidised bed under conditions which...
6746653 Process for recovering catalyst transition metals from salt-containing reaction mixtures  
Transition metals may be recovered from a salt-containing mixture containing at least one transition metal compound, salts, and organic compounds by separating from the salt-containing mixture a...
6627313 Spindle-shaped magnetic metal particles containing iron as main component and processes for producing the same  
Spindle-shaped magnetic metal particles containing iron as a main component of the present invention, have an average major axis diameter (L) of 0.05 to 0.15 μm; a coercive force of 111.4 to 143.2...
6627171 Method for producing iron carbide from granulated sponge iron  
Process for producing Iron carbide wherein, in a first stage, Iron ore is reduced to sponge iron using a reducing gas containing at least 90% hydrogen, on a nitrogen-free basis, to produce a sponge...
6599374 Method for producing a mixture of iron carbide and granular, directly reduced iron  
An end product containing iron carbide (Fe 3 C) is produced from an intermediate product consisting of granular, directly reduced iron. Said intermediate product is supplied by an iron ore...
6544673 Spindle-shaped magnetic metal particles containing iron as main component and processes for producing the same  
Spindle-shaped magnetic metal particles containing iron as a main component, having an average major axis diameter (L) of 0.05 to 0.15 μm; a coercive force of 111.4 to 159.2 kA/m; a Co content of...
6511646 Treatment of iron chloride from chlorination dust  
A process for producing chlorine and iron oxide from iron chloride (which may be generated as a by-product of the direct chlorination of titaniferous ores) comprises the steps of converting ferrous...
6488901 Method of adjusting a circulating fluidized bed and use of the method  
A process for adjusting a circulating fluidized bed, wherein a part of the carrier gas is recovered, mixed with a propellant and returned to the fluidized bed as a carrier gas.
6379426 Fluidized bed reduction of laterite fines with reducing gases generated in situ  
The present invention is concerned with a method for the pre-reduction of laterite fines in a reactor, preferably a fluidized bed, with reducing gases generated in situ by adding a reducing agent...
6277171 Method of reducing the iron content of steel slag  
A method of reducing the iron content of starting material containing calcium, silicon and oxygen, and iron in the form of a ferrite and/or oxide, for example a steel slag, includes the steps of...
5972302 Method for the microwave induced oxidation of pyritic ores without the production of sulphur dioxide  
Pyritic ores are heated with microwave energy in a fluidized bed to a temperature in the range of approximately 573 degrees Kelvin to 823 degrees Kelvin with a controlled amount of oxygen to...
5911967 Process and apparatus for production of ferric oxide from iron chloride solutions  
A process and an apparatus for the production of iron oxides having low chloride ion content comprising charging of a free HCl containing iron chloride solution into a spray roaster with a feeding...
5733357 Process for converting iron oxide to iron carbide employing internally generated carbon oxide as the carbiding agent  
A process for converting iron oxide to iron carbide using hydrogen as a reducing gas. Water is generated by the reduction of the iron oxides using hydrogen. The amount of water present in the...
5667556 Method of reprocessing zinc- and iron oxide-containing residual material  
This invention describes a method of reprocessing zinc- and iron oxide-containing residual material. Zinc- and iron oxide-containing dust and/or sludge is granulated with water, granules and...
5560762 Process for the heat treatment of fine-grained iron ore and for the conversion of the heat treated iron ore to metallic iron  
Disclosed is a process for the heat treatment of fine-grained iron ore and for the conversion of the heat-treated iron ore to metallic iron, wherein a) the fine iron ore is reacted with at least...
5527379 Process for a direct reduction of iron oxide containing materials to form Fe.sub.3 C  
In order to effect a reduction and a carburization to form Fe 3 C to the highest possible degree in a relatively short time in an economical process, a treatment in two stages is effected in...
5490976 Continuous ore reaction process by fluidizing  
In a continuous process for reacting particulate ore with a liquid reagent in a counter-current vertical column the improvement comprising: (a) providing an upper and lower chamber for the...
5320815 Fluidized bed process  
In a fluidized bed process having a bed of fluidized particulate material which is susceptible to having at least some of the particulate material being entrained in the gases exiting the bed, the...
5316746 High purity iron oxide and method for production hereof  
A method for producing high-purity iron oxide which comprises pulverizing iron ore into powder having an average particle diameter of 20-150 μm, removing fine particles from the powder, and...
5277795 Process and apparatus for recovering heavy metal from carbonaceous material  
Heavy metal compounds, particularly vanadium pentoxide, are recovered from petroleum coke by combusting the coke under conditions constraining the temperatures to within the range 680° C. to...
5147619 Nickel recovery using a fluidized bed process  
A process for the recovery of nickel catalyst metal from a top portion of a fluidized bed consists essentially of the steps of providing a sludge material including spent catalyst including...
5118479 Process for using fluidized bed reactor  
A novel design for a fluidized bed reactor is provided. The fluidized bed reactor includes a baffle system to ensure the proper residence time of the feed materials. The fluidized bed reactor also...
4994255 Oxidation of ferrous chloride directly to chlorine in a fluid bed reactor  
A process for recovering elemental chlorine from ferrous chloride produced during chlorination of a titaniferous ore or ore beneficiate by oxidizing ferrous chloride in a fluidized bed of...
4789580 Process of reducing higher metal oxides to lower metal oxides  
Disclosed is a process to effect a reduction to a desired, constant degree as exactly as possible and to achieve a low surplus of carbon. The reduction by treatment with carbonaceous reducing...
4624843 Recovery of chlorine  
Chlorine may be recovered from residues from the fluidized bed chlorination of iron-containing metalliferous oxidic materials, such as ilmenite, bauxite, chromite, wolframite, scheelite, tantalite...
4619814 Process for the recovery of non-ferrous metals from sulphide ores and concentrates  
This invention relates to the development of a viable metallurgical process capable of treating low grade concentrates, bulk concentrates, dirty concentrates, or ore directly for the recovery of...
RE32247 Process for the direct production of steel  
A process for the direct production of steel from particulate iron oxides or concentrates including two major steps in which in Step (1) the iron oxides are converted to iron carbide and in Step...
4576636 Process for beneficiating oxidic ores  
A process for the beneficiation of an iron-containing material is carried out by first chlorinating the iron-containing material. Oxidation of ferrous chloride in the effluent gas from the...
4398945 Process for producing a ferronickel alloy from nickel bearing laterites  
The object of the invention is to provide a process for the recovery of iron and nickel from low iron content laterite ores. Said process comprises subjecting the ore to a carburizing step in the...
4396423 Process for recovering iron and zinc from steel making dusts  
The object of the invention is to provide a process for the recovery of iron and zinc from steel making flue dust. The process comprises subjecting the flue dust to a carbiding step in a fluid bed...
4344792 Reduction smelting process  
A process for recovering metal values from sulfide ores or concentrates by a fluid bed roast-reduction smelting-converting process which delivers to the reduction smelting furnace either a blend of...
4304759 Process for obtaining metal oxide and SO.sub.2 -containing gases essentially free of SO.sub.3 and H.sub.2 SO.sub.4 from ferrous sulphate containing salt  
The invention provides a process for thermally decomposing salts, containing mainly ferrous sulfate wherein said feed material is contacted in a single suspension-type exchanger with exhaust gases...
4298460 Process for processing sulfur-containing heavy oil  
A process for processing a sulfur-containing heavy oil, which comprises: in a first zone, catalytically cracking a sulfur-containing heavy oil in the presence of fluidized catalyst particles...
4279640 Process for upgrading iron-containing materials  
Material containing iron in combination with chromium, such as chromite ore or sand, may be upgraded by removing at least some iron by a fluidized bed process in which iron is chlorinated to...
4259298 Recovery of chlorine values from iron chloride by-product in chlorination of aluminous materials  
The invention relates to a method of recovering the chlorine values from iron chloride obtained from the chlorination of an aluminous material containing iron oxide, such as bauxite. The method...
4244929 Recovery of chlorine values  
The invention relates to the recovery of chlorine values as ferric chloride from iron chloride dust which is obtained as a by-product from the chlorination of a titaniferous material containing...
4224140 Process for producing cracked distillate and hydrogen from heavy oil  
A process for producing a cracked distillate and hydrogen from a heavy oil which comprises cracking the heavy oil in the presence of laterite or a laterite-containing catalyst while simultaneously...
4220518 Method for preventing coking in fluidized bed reactor for cracking heavy hydrocarbon oil  
In a reactor for cracking heavy hydrocarbon oil through a fluidized bed of particles of natural ores, coke-like materials are deposited on a top of the reactor or pipe inside surfaces of a transfer...
4214901 Hydrometallurgical refining of nickeliferous sulfides  
Nickeliferous sulfidic materials containing at least one other metal selected from the group consisting of cobalt, copper and iron are leached with an at least 3 N hydrochloric acid solution to...
4179489 Chlorination of iron-containing materials  
A process for the chlorination of a material containing iron and titanium chemically combined with oxygen, comprising feeding the material to be chlorinated, in particulate solid form, into a...
4168157 Process for the suspension smelting of sulfide concentrates  
A process for the suspension smelting of sulfide concentrates by causing a suspension flowing downwards in a suspension reaction zone to impinge against the surface of a melt below the suspension...
4133865 Process for preparing metallic sulphates  
An improved process for preparing a metallic sulphate in a reaction zone from mixing of the corresponding metallic sulphide concentrates with ammonium sulphate and heating. Heating preferably...
4085189 Process for recycle beneficiation of titaniferous ores  
An improved process for beneficiating titaniferous ore to produce essentially iron-free titanium dioxide wherein a fluidized mixture of ore and a recycled iron-containing partially chlorinated...
4059673 Production of bauxite and aluminium chloride of low iron content  
Removal of iron from aluminous material such as bauxite is effected by treatment with a gas mixture comprising sulphur dioxide and carbon monoxide in a first step, followed by chlorination in a...
4055621 Process for obtaining titanium tetrachloride, chlorine and iron oxide from ilmenite  
A process for obtaining chlorine and iron oxide from iron chloride by adding iron oxide to iron chloride prepared by chlorinating iron-containing titanium ore, in an amount of above 10 percent by...
3950489 Chlorine treatment of titaniferous ores  
Artificial rutile of high TiO 2 grade is produced by chlorine treatment of titaniferous ore such as ilmenite which comprises a combination of (1) a pretreatment step in which the ore is oxidized...
Matches 1 - 50 out of 99 1 2 >