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Method for separating molybdenum and rhenium from rhenium and molybdenum-containing concentrate

A technology of molybdenum concentrate and concentrate, which is applied in the field of molybdenum metallurgy, can solve the problems that molybdenum concentrate is easily brought into the flue gas, the oxidation rate of rhenium and molybdenum is low, and the oxidation is insufficient, so as to avoid the formation of by-products, Effect of optimizing roasting conditions and improving oxidation efficiency

Active Publication Date: 2014-09-03
DAYE NONFERROUS METALS
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0013] The purpose of the present invention is to solve the problems of insufficient oxidation, low oxidation rate of rhenium and molybdenum when the rhenium-containing molybdenum concentrate is separated by the oxidation roasting method, and the fine-grained molybdenum concentrate is easily carried into the flue gas , while the low flue gas temperature leads to the Re in the flue gas 2 o 7 Easy to be reduced to ReO which is insoluble in water 2 , the problem of low recovery rate of rhenium and molybdenum, providing a method for separating molybdenum and rhenium from rhenium-containing molybdenum concentrate

Method used

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  • Method for separating molybdenum and rhenium from rhenium and molybdenum-containing concentrate
  • Method for separating molybdenum and rhenium from rhenium and molybdenum-containing concentrate

Examples

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Embodiment 1

[0031] (1) Add a binder and an oxidant to the molybdenum grade 40%, rhenium grade 0.034%, particle size ≤200 mesh rhenium-containing molybdenum concentrate, and then add 3.0% water of the concentrate mass and stir evenly. A disc pelletizer was used to prepare a rhenium-containing molybdenum concentrate pellet 1 with a particle size of 3mm and a moisture content of 12%; the binder was any one of polyvinyl alcohol or polyacrylamide, and its addition The amount is 0.04% of the mass of rhenium-containing molybdenum concentrate; the oxidant is MnO 2 , The addition amount is 3.0% of the mass of rhenium-containing molybdenum concentrate, and the main active ingredient of the rhenium-containing molybdenum concentrate is molybdenite MoS 2 , Rhenium ReS 2 ;

[0032] (2) Spread the rhenium-containing molybdenum concentrate pellets on the grate bed 3 of the grate machine 2 with a thickness of 50mm, and then let the rhenium-containing molybdenum concentrate pellets enter the grate bed into the...

Embodiment 2

[0038] (1) Add binder and oxidant to molybdenum concentrate with molybdenum grade of 30%, rhenium grade of 0.02%, particle size ≤200 mesh, add binder and oxidant, and then add 2.0% water of concentrate mass and stir evenly. A cylindrical granulator is used to prepare pellets of rhenium-containing molybdenum concentrate with a particle size of 4mm and a moisture content of 10%; the binder is either polyvinyl alcohol or polyacrylamide, and the added amount It is 0.06% of the mass of rhenium-containing molybdenum concentrate; the oxidant is MnO 2 , The addition amount is 2.0% of the mass of rhenium-containing molybdenum concentrate;

[0039] (2) Spread the rhenium-containing molybdenum concentrate pellets on the grate bed of the grate machine with a thickness of 60mm, and then make the rhenium-containing molybdenum concentrate pellets enter the preheating chamber of the grate machine along with the grate bed. Drying for 25 minutes at 185°C and a drying wind speed of 1.5m / s, so that ...

Embodiment 3

[0045] (1) Add binder and oxidant to molybdenum grade of 50%, rhenium grade of 0.1%, particle size ≤200 mesh rhenium-containing molybdenum concentrate, and then add 2.5% water of the concentrate mass and stir evenly. A disc pelletizer is used to prepare pellets of rhenium-containing molybdenum concentrate with a particle size of 5mm and a moisture content of 11%; the binder is any one of polyvinyl alcohol or polyacrylamide, and its addition amount It is 0.08% of the mass of rhenium-containing molybdenum concentrate; the oxidant is MnO 2 , The addition amount is 2.5% of the mass of rhenium-containing molybdenum concentrate, and the main active ingredient of the rhenium-containing molybdenum concentrate is molybdenite MoS 2 , Rhenium ReS 2 ;

[0046] (2) Spread the rhenium-containing molybdenum concentrate pellets on the grate bed of the grate machine with a thickness of 80mm, and then make the rhenium-containing molybdenum concentrate pellets enter the preheating chamber of the gra...

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Abstract

The invention discloses a method for separating molybdenum and rhenium from rhenium and molybdenum-containing concentrate. The method comprises the following steps: adding an adhesive, an oxidant and water in rhenium and molybdenum-containing concentrate to prepare rhenium and molybdenum-containing concentrate pellets with grain size of 3-6mm and moisture of 8-12%, and distributing the concentrate pellets on a chain grate bed of a chain grate machine to carry out drying, oxidizing roasting and cooling, so that molybdenite in the pellets is oxidized into MoO3, and the rhenite is oxidized into Re2O7, which are volatilized to enter smoke and then are recovered by drip washing with water; in above process, the method of oxidizing roasting at two sections is adopted, the oxidizing efficiency of the molybdenite and the rhenite in the concentrate pellets are improved through different air roasting temperatures and air speeds, the Re2O7 concentration in the smoke is improved by circulating roasting smoke in a roasting chamber II to a roasting chamber I, and the smoke is maintained at 300-400 DEG C to effectively inhibit Re2O7 from being reduced by the SO2 so as to increase the recovery rate of the Re2O7; by adopting the roasting method disclosed by the invention, the volatilization rate of rhenium in the roasting process can be not less than 80%, the content of soluble molybdenum in roasted molybdenum is not less than 90%, the molybdenum and the rhenium are efficiently oxidized and separated.

Description

Technical field [0001] The invention belongs to the molybdenum metallurgy industry in the field of non-ferrous metallurgy, in particular to a method for separating molybdenum and rhenium from molybdenum concentrate containing rhenium. Background technique [0002] Rhenium is a rare and refractory metal. In recent years, the application of its super heat-resistant alloys in the aviation and aerospace industries has been increasing, and the demand has become more and more urgent. So far, only rhenium ore (ReS 2 ) And copper rhenium sulfide (CuReS 4 2) Two independent rhenium minerals, most of which are associated with molybdenum, copper, zinc, lead and other minerals, and the valuable raw material for extracting rhenium is mainly molybdenite MoS 2 , Which can be used to extract rhenium to rhenium ReS 2 Form exists. Since molybdenum and rhenium exist together in the same form, in order to purify and utilize rhenium, molybdenum and rhenium must be separated first. The current treatm...

Claims

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Application Information

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IPC IPC(8): C22B1/244C22B1/02C22B34/34C22B61/00
Inventor 甘敏张麟王勇范晓慧姜涛邱冠周李伟程志华吕重安曾祥龙汤雁斌刘朝辉李晓林邓琼陈许玲
Owner DAYE NONFERROUS METALS
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