A technique is provided, in which impure metal is efficiently separated and removed from titanium-containing raw material such as titanium slag or ilmenite and high titanium-containing raw material is produced. The method for improving quality of titanium-containing raw material containing slag, including steps of: oxidizing the titanium-containing raw material, selectively chlorinating impurities in the titanium-containing raw material, and separating and removing the impure chlorides to obtain high titanium-containing raw material. Alternatively, in this method, the oxidizing treatment and the selective chlorinating treatment are performed simultaneously.

Provided are a method for processing titanium extraction slag and a carbon extraction and dechlorination tailing. The method comprises the following steps that a titanium extraction slag raw material is ground to obtain a treated material with a particle size being 0.3˜120 μm and d.sub.90≤90 μm; a first solvent and a treated material are mixed with a liquid-solid ratio of (3.5˜4.5): 1 L/kg, and a first capturing agent and a first foaming agent are added for mixing and then subjected to a primary flotation to obtain a floating product and a sinking product; and a second solvent is added into the floating product to adjust the liquid-solid ratio to (4˜5): 1 L/kg, a second capturing agent and a second foaming agent are added for mixing and then subjected to a secondary flotation to obtain a foam product; the foam product is filtered and dried to obtain a refined carbon, and the sinking product is filtered and dried to obtain the carbon extraction and dechlorination tailing, wherein the d.sub.90≤90 μm means that more than 90% of the powder in the treated material has a particle size of less than 90 μm. The method has the advantages that carbon in the titanium-extracted slag can be recycled, chlorine is removed, and the carbon extraction and dechlorination tailing can be used as a building material raw material.

The present invention relates to metallurgical processes, and more particularly to a process for producing titaniferous feedstock and fines, a process for agglomerating titaniferous fines, and a process for producing titaniferous metals and titaniferous alloys. Recovery of rare-earth, vanadium and scandium from titanium iron bearing resources is also disclosed. Selective leaching for Scandium recovery from all magnetite type resources such as ilmenite, ferro titanic resources, nickel laterites, magnetite iron resources etc.

The invention relates to a method for starting up a fluidized bed boiler, such as a circulating fluidized bed (CFB) or a bubbling fluidized bed (BFB) boiler, for operation with a predetermined concentration of ilmenite particles in the bed material. The invention also relates to a method for pre-oxidizing ilmenite, to pre-oxidized ilmenite and to the use of pre-oxidized ilmenite in a fluidized bed boiler.

The invention relates to a method for starting up a fluidized bed boiler, such as a circulating fluidized bed (CFB) or a bubbling fluidized bed (BFB) boiler, for operation with a predetermined concentration of ilmenite particles in the bed material. The invention also relates to a method for pre-oxidizing ilmenite, to pre-oxidized ilmenite and to the use of pre-oxidized ilmenite in a fluidized bed boiler.

The invention relates to a method for starting up a fluidized bed boiler, such as a circulating fluidized bed (CFB) or a bubbling fluidized bed (BFB) boiler, for operation with a predetermined concentration of ilmenite particles in the bed material. The invention also relates to a method for pre-oxidizing ilmenite, to pre-oxidized ilmenite and to the use of pre-oxidized ilmenite in a fluidized bed boiler.

A method for enriching niobium and titanium in a mineral containing iron, niobium, and titanium, includes: reacting raw materials comprising 1 part by weight of a mineral containing iron, niobium, and titanium, 0.1-0.8 part by weight of a nickel-containing substance and 0.2-1 part by weight of carbon at 800-1500 C. to obtain a nickel-iron alloy and a niobium-titanium rich slag, where an amount of the mineral containing iron, niobium, and titanium is counted in terms of iron element, and an amount of the nickel-containing substance is counted in terms of nickel element. The nickel-containing substance is one or more selected from the group consisting of oxides of nickel and nickel minerals.

Disclosed is a method of producing titanium and titanium alloy nanopowder from titanium-containing slag through a shortened process. The method includes: (1) subjecting titanium-containing slag to high-temperature oxidation and enrichment and then melting to precipitate titanium-enriched slag; (2) subjecting the titanium-enriched slag to pulverization and gravity flotation; (3) carrying out secondary enrichment; (4) preparing a molten salt reaction system; (5) synthesizing titanium and salt-containing titanium alloy nanopowder by reduction reaction; and (6) vacuum filtering, pickling, washing and vacuum drying the salt-containing titanium alloy nanopowder; and then separating titanium alloy nanopowder from the molten salt. Using the present method, the titanium-containing slag can be continuously treated to produce titanium and titanium alloy nanopowder. It requires a shortened process, a simple equipment and low energy consumption. The process is environmentally friendly and produces excellent products without solids, gas or liquids that are harmful to environment.

A method is disclosed including: (a) use of sized respectively, ilmenite concentrates and leucoxene concentrates with less than 20% weight of minus 100 microns and titania slags in the 75 to 850 micron range containing minor alkaline oxides within the market limits for chloride TiO2 feedstocks; (b) oxidizing respectively the sized, ilmenite concentrates, leucoxene concentrates and titania slags by contacting with and oxygen containing gas at the temperature of at least of 850 C. for a period of at least 1.5 hours such that, a substantial portion of iron oxide are converted to the ferric state; (c) reducing respectively, the oxidized ilmenite concentrates, oxidized leucoxene concentrates and oxidized titania slags in a reducing atmosphere at a temperature of at least about 1150 C. for a period of at least 1 hour such that the ferric state iron oxides are converted to the metallic iron state; (d) Chlorination respectively, of the resulting oxidized and subsequently reducednamely treated, ilmenite concentrates, leucoxene concentrates and titania slags at a temperature of at least about 800 C., for a period of at least about 1 hour; (e) washing in water and drying respectively, the Upgraded chlorinated ilmenite concentrates, Upgraded chlorinated leucoxene concentrates and Upgraded chlorinated titania slags. The method produces respective products with high TiO2 content suitable for the chloride process of TiO2 pigment production and, ferric chloride condensate By-product suitable for the waste water and water treatment industry.

Provided are a method for processing titanium extraction slag and a carbon extraction and dechlorination tailing. The method comprises the following steps that a titanium extraction slag raw material is ground to obtain a treated material with a particle size being 0.3120 m and d.sub.9090 m; a first solvent and a treated material are mixed with a liquid-solid ratio of (3.54.5): 1 L/kg, and a first capturing agent and a first foaming agent are added for mixing and then subjected to a primary flotation to obtain a floating product and a sinking product; and a second solvent is added into the floating product to adjust the liquid-solid ratio to (45): 1 L/kg, a second capturing agent and a second foaming agent are added for mixing and then subjected to a secondary flotation to obtain a foam product; the foam product is filtered and dried to obtain a refined carbon, and the sinking product is filtered and dried to obtain the carbon extraction and dechlorination tailing, wherein the d.sub.9090 m means that more than 90% of the powder in the treated material has a particle size of less than 90 m. The method has the advantages that carbon in the titanium-extracted slag can be recycled, chlorine is removed, and the carbon extraction and dechlorination tailing can be used as a building material raw material.