The invention discloses a tungsten-rhenium alloy which contains 65-75ppm of potassium and 0.45-0.55% of rhenium.

The invention also discloses a manufacturing method of the tungsten-rhenium alloy, which comprises the following steps: A. preparing doping tungsten-rhenium powder: mixing doping tungsten powder solid and ammonium rhenate solution to obtain a doping tungsten-rhenium instillation, and drying the instillation to obtain doping tungsten-rhenium powder, wherein in the mixing process, the temperature is kept at 30-50 DEG C and the solid-liquid weight ratio is (100-300):5; B. reducing to obtain tungsten-rhenium mixed powder; C. compacting; D. presintering; and E. sintering to obtain the tungsten-rhenium alloy.

The method has the advantages of simple technique, uniform distribution of doping rhenium in the alloy, and favorable material uniformity; and the prepared tungsten-rhenium alloy has favorable high temperature properties and processability, and thus, is an ideal new material for lamp filaments.




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The present invention relates to a micro-lanthanum-doped tungsten preparation method comprises the following steps: (1) pre-reduction to ammonium paratungstate blue tungsten; (2) the incorporation of silicon, potassium, aluminum nitrate solution, prepared doped tungsten blue; (3) the amino acid solution is sprayed onto the lanthanum doped tungsten blue stirring and drying, to obtain amino acid lanthanum doped tungsten blue; (4) a reduction reaction in the reduction furnace; (5) acid, to obtain a tungsten alloy powder of lanthanum ; (6) pressed into uniform density tungsten billet; (7) is pre-sintered to obtain a pre-sintered strip; (8) a sintered sintered to obtain a sintered article incipient fusion; (9) swaging, to obtain a tungsten rod; (10) annealing; (11) swaged to obtain tungsten rod; (12) Crude stretch; (13) the oxidation annealing; (14) via a plurality of motifs drawn into the required fine tungsten wire.

The invention has the advantages of simple process, easy to implement and cost advantages of production while using this method produced by micro-lanthanum-doped tungsten has a long life, good optical performance, strong seismic performance and a light bulb filament in the use of a small amount of sag features.




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The invention provides a method for recovering nickel and tungsten by a waste nickel and tungsten catalyst.

The method comprises the following steps of: first, reducing roasting the waste nickel and tungsten catalyst at a high temperature to reduce nickel and ferric ions in the waste nickel and tungsten catalyst to metals nickel and iron, wherein other oxidants are not reduced; then, adding a copper liquid to the roasted material, replacing metals nickel and iron with copper ions, wherein nickel and iron are in ionic states to enter into the liquid; then, filtering and extracting the replaced and leached liquid; separating nickel from copper and iron, wherein the raffinate obtained by extraction is a pure nickel liquid which can be directly concentrated and crystallized to obtain nickel crystals; mixing the filter residue replaced and leached with sodium carbonate, roasting at a high temperature and washing with hot water to obtain a liquid containing sodium tungstate, wherein the filter residue is used for recovering aluminum and copper; performing acidification to the liquid containing sodium tungstate; and washing and drying the filtered filter residue with hot water to obtain tungstic acid with purity over 98.5%.


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The present invention belongs to the technical field of metallurgy, in particular to provide a process for producing ultra-coarse tungsten powder method.

Wherein the intermediate product is ammonium tungstate solution of sodium tungstate and tungsten hydrometallurgy as raw material, by mixing the two solutions, concentrated by evaporation and drying by heating to obtain precursor, adding a certain proportion of the precursor thin tungsten powder recycle material, subjected to a hydrogen reduction in a tube furnace, and then washed with water to remove the sodium ions by means of ultrasonic waves, filtered and dehydrated with industrial alcohol, and finally dried under vacuum and sieved to obtain extra coarse tungsten powder, screening out the fine tungsten powder Returns the raw material recycling. The present invention is a simple process equipment, reducing the temperature is low, the reduction time is short, high efficiency, low cost, can be prepared in a particle size of 60 ~ 150μm ultra coarse tungsten powder, crystallized complete, spherical, good formability, high purity.


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