A method to recycle TiB2 articles, and in particular, a method to recycle a TiB2 feedstock including TiB2 articles and Ti-ore and/or Ti-slag by chlorination.

An object of the present invention is to recover a minor metal and/or rare-earth metal. The present invention provides a method for recovering a minor metal and/or rare-earth metal from a post-chlorination residue in titanium smelting. The minor metal and/or rare-earth metal is one or more metal selected from the group consisting of Sc, V, Nb, Zr, Y, La, Ce, Pr, and Nd.

The invention relates to non-ferrous metallurgy and concerns a device for chlorinating titanium-containing material in a solution of chloride salts. The technical effect of the invention is an increase in the service life of the device and a reduction in raw material losses. This technical effect is achieved by means of the proposed device for chlorinating titanium-containing material in a solution of chloride salts, comprising a housing, a lined upper cylindrical chamber for a gas-vapour mixture, a lined chlorinating chamber in the shape of an inverted truncated cone, the generatrix of which is inclined at an angle of 15-25° to the axis of the chamber, graphite electrodes, a hearth, tuyeres, chlorine feed lines, and a feedstock charging assembly, wherein the housing is provided with reinforcing ribs in the region of the chlorinating chamber and of an upper drainage pocket.

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.

An object of the present invention is to recover a minor metal and/or rare-earth metal.

The present invention provides a method for recovering a minor metal and/or rare-earth metal from a post-chlorination residue in titanium smelting.

The minor metal and/or rare-earth metal is one or more metal selected from the group consisting of Sc, V, Nb, Zr, Y, La, Ce, Pr, and Nd.

The present invention provides a method for recycling waste cemented carbide by molten salt chemistry, comprising the steps of: (1) carrying out vacuum dehydration on a molten salt media; (2) carrying out oxidation-dissolution reaction on waste cemented carbide in the molten salt media; (3) carrying out deoxidation treatment on a molten salt system; (4) carrying out thermal reduction reaction on the molten salt system; and (5) washing, filtering and vacuum drying obtained mixture by thermal reduction reaction to carry out separation and collection of the molten salt media and waste cemented carbide nanopowder. Compared with existing method for recycling waste cemented carbide, the invention has the advantages of short flow, simple equipment, low energy consumption, and excellent recycled products. Moreover, the invention doesn't produce solid/gas/liquid harmful substances to pollute the environment, and can create enormous economic and social benefits.

A micro-agglomerate of fines of a material that is predominantly titanium dioxide in which the fines are bound in the micro-agglomerate by a polysaccharide gum or cellulose derivative and in which the micro-agglomerate has been heated in the temperature range 250-600 C. so that the polysaccharide gum or cellulose derivative is an effective primary binder of the fines when the micro-agglomerate is subjected to high temperature gas flow conditions equivalent to those in the Chloride Process. Also disclosed is a method of agglomerating fines of a material that is predominantly titanium dioxide.

Provided is a method for preparing rutile from acid-soluble titanium slag, including: grinding acid-soluble titanium slag; adding a sodium carbonate modifier, and performing microwave irradiation treatment in a microwave device; adding an ammonium bifluoride additive; and performing acid purification and calcination to obtain rutile. By means of a microwave heating mode, the equipment investment needed by the method is low, and the energy consumption is low. The purity of artificial rutile is more than 91%, byproducts are fewer, and the environmental pollution is low.

Provided is a method for preparing rutile from acid-soluble titanium slag, including: grinding acid-soluble titanium slag; adding a sodium carbonate modifier, and performing microwave irradiation treatment in a microwave device; adding an ammonium bifluoride additive; and performing acid purification and calcination to obtain rutile. By means of a microwave heating mode, the equipment investment needed by the method is low, and the energy consumption is low. The purity of artificial rutile is more than 91%, byproducts are fewer, and the environmental pollution is low.

The present invention provides a method for recycling waste cemented carbide by molten salt chemistry, comprising the steps of: (1) carrying out vacuum dehydration on a molten salt media; (2) carrying out oxidation-dissolution reaction on waste cemented carbide in the molten salt media; (3) carrying out deoxidation treatment on a molten salt system; (4) carrying out thermal reduction reaction on the molten salt system; and (5) washing filtering and vacuum drying obtained mixture by thermal reduction reaction to carry out separation and collection of the molten salt media and waste cemented carbide nano powder. Compared with existing method for recycling waste cemented carbide, the invention has the advantages of short flow, simple equipment, low energy consumption, and excellent recycled products. Moreover, the invention doesn't produce solid/gas/liquid harmful substances to pollute the environment, and can create enormous economic and social benefits.