Method for extracting metals from depulped ores

FIELD: metallurgy.

SUBSTANCE: method for extracting metals from depulped ores involves crushing, ore depulping in leached solution and sorption of metal. Leaching is performed in ultrasound pulp cavitation mode. Metal sorption on ion-exchange resin is performed from pulp filtration solution in intensity field of alternating current in sorption activation mode of extracted metal and suppression of sorption of impurities. At that, polarity of electrodes is constantly changed to avoid deposition of metal on cathode. Leaching and sorption of metal is performed in a unit providing solution circulation till the specified completeness of leaching from ore and its complete sorption on ion-exchange resin is achieved.

EFFECT: improving metal extraction intensity.

2 cl, 1 dwg

 

The invention relates to the field of mining and can be used in the leaching of metals from ores to intensify the leaching and sorption of metals by ion-exchange resins.

There is a method of extraction (leaching) of noble metals from ores (A.S. No. 1616158 from 25.10.1988, IPC C22B 3/00, C22B 11/00).

A disadvantage of the known solution is the impossibility of using the method on an industrial scale, since the creation of the electric spark discharge is possible at a small distance of the electrodes from each other and a high voltage on the electrodes (thousands of volts).

The closest technical solution is the way sorption leaching of gold, in which the grinding and raspulpovka gold ore in the leach solution, the application of the process of leaching and sorption of the field intensity of the electric current, leaching gold with cyanide, sorption on nanoantennas resin S-2B (Re-extraction of gold from tailings ore / Busin. - abstract. dis. on saisc. exercises. step. Dr technology. Sciences. - Almaty, 2004 - 43 C.).

The essence of the prototype method is that when raspulpovka crushed ore pulp saturated clayey silts. During electrosorption leaching together with gold in the pulp pass various impurities, including depressariidae toxic resin. Under these conditions, when applying the process of electric current there is a technical contradiction between the rate of leaching and sorption of gold. In this technical solution decreases the capacity of the resin for gold. Filtering the slurry in the method prototype is not provided and impossible in its implementation. In accordance with the specified technical solution the efficiency is low.

The technical result is an increase in the intensity and completeness of extraction of metal from raspolojennoi ore.

The technical solution of the declared object is that the leaching is carried out in the mode of ultrasonic cavitation and sorption of metal by applying to the process field intensity of the electric current in the regime of alternating the polarity of the electrodes, and the leaching and sorption of lead in the single device mode of a closed circular solution flow.

The method is illustrated in the drawing (figure 1).

The technical solution is in the ring system (figure 1), closed through the transfer pump 1. The apparatus is divided into two working sections of the filtering device 2. Section AB is used for leaching the metal from the solid phase of the pulp with the imposition of ultrasonic cavitation mode from magnetostrictive transducers 3 types of PMS. Section of the aircraft used for the sorption of metal on IONEX resin 4 with tax is the group of electric current from the electrodes 5 with variable polarity. The method is as follows.

On the pulp 6 impose ultrasound cavitation mode, under the action of shock waves arising from the collapse of cavitation cavities, is cavitation erosion surface ore part of the pulp due to svecokarelian effect occurs abnormally deep penetration of the solvent metal in the capillaries of the ore and removing the metal in the solution increases dramatically. Then the slurry was filtered from silt and parasitic impurities, filtered solution is passed into the section sorption, metal precipitated on IONEX resin, the deposition of lead in the field of the electric current with a current that activates the sorption of metal being recovered and suppressing the adsorption of impurities at the same time to increase the capacity of the sorbent (ion exchange resin) using the polarization effect due to an alternating electric field effect Hamurana. The field strength is creating removable mesh electrodes, the polarity of which is constantly changing, than eliminate the deposition of sorbed by the resin of the metal on the cathode. Leaching and sorption of lead in the circular mode of circulation of the solution, up to specified amounts of metal extraction in the solution and of the solution of resin.

Comparative laboratory studies of the claimed method and prototype conducted in the AOR is oestergade ore, contains: Au - 7.0 g/t, Aq - 2.8 g/t, Zn and 0.03%, Cu - 0,012%, Al - 12.3 g/t, SiO2- 69% and other impurity elements. The leaching is carried out using alkali cyanide with the original content of NaCN - 5 g/l, the voltage on the electrodes 15 to 35 at an amperage of from 0.2 to 0.6 and the frequency from 50 to 440 Hz ± 5%. Sorption of gold on the resin S-2B with a full tank volume (RLP) for Cl-ion of 3.1 mEq/g of sorbent. Ultrasonic treatment of the pulp with a frequency of from 5 to 20 kHz at a rate of 1.5 to 2.5 W/cm210 min with 5 min break.

Comparison of the results of the experiments showed that when the present method compared with the method on the prototype of the intensity of the extraction of gold from ore pulp increased by 47.3%, and the complete saturation of the resin increased from 8.1 mg/g to 15.6 mg/g

1. The method of extraction of metals from raspolovennyh ores, including grinding, raspulpovka ore in the leach solution and sorption of metal, characterized in that the leaching of lead into the mode of ultrasonic cavitation in the slurry, and the sorption of metal ion-exchange resin lead from the solution, filtering the slurry in a field of tension alternating electric current in the activation mode sorption recoverable metal and suppression of adsorption of impurities, while the polarity of the electrodes is constantly changing to address the deposition of metal on the cathode.

2. The method according to claim 1, characterized in that the leaching and with whom rblu metal are in the same apparatus, providing a circulation of the solution until the desired fullness leaching from ore and completeness of its sorption on ionite resin.



 

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3 cl, 1 tbl, 6 ex

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4 tbl

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1 ex

FIELD: chemistry.

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1 dwg, 3 tbl, 4 ex

FIELD: metallurgy.

SUBSTANCE: procedure consists in preparation of water pulp from raw material, in introduction of sulphuric acid and anionite into it for leaching and in extraction of vanadium from pulp by sorption. Upon sorption saturated anionite is withdrawn and washed; vanadium is de-sorbed from anionite and regenerated anionite is introduced to the stage of leaching and sorption. Also, water vanadium pulp is prepared from vanadium containing raw material. As such there is used oxidised slag or slime at pH 11.5-7.5. Sulphuric acid is introduced into prepared water pulp at S:L=1:2 to pH 4.5-4.0. Vanadium is extracted from pulp by counter-flow sorption at pH 4.5-1.8 with following saturated ionite washing at drainage. Value of pH in pulp is maintained at 4.5-4.0 at withdrawal of saturated anionite, while at introduction of regenerated anionite - 2.0-1.8.

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2 cl, 4 tbl, 2 ex

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1 ex

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1 ex

FIELD: metallurgy.

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9 cl, 1 tbl, 5 ex

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1 dwg, 3 tbl

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4 tbl

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4 cl, 2 tbl, 1 ex

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2 cl, 2 ex, 4 dwg, 1 tbl

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2 cl, 2 tbl, 1 ex

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11 cl, 3 tbl, 1 ex

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22 cl, 1 dwg, 3 tbl

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2 tbl, 2 ex

FIELD: metallurgy.

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16 cl, 1 dwg, 3 ex

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2 cl, 1 dwg, 2 ex

FIELD: chemistry.

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1 dwg, 1 tbl, 1 ex

FIELD: metallurgy.

SUBSTANCE: invention relates to a method of treatment of copper electrolysis slime floatation concentrate containing precious metals. The method includes leaching and precious metal extraction. Prior to leaching, sintering of floatation concentrate is done in a saline mixture of NaNO3 and NaOH at a ratio 3: 2 at 350-370°C during an hour. The product produced by sintering is subjected to leaching conducted by water at a ratio S:L-1:3 resulting in metal fraction production. The latter is directed to extraction of precious metals through refining and pulp containing a salt fraction and a solution. The pulp is subjected to filtering, wherein the solution is used rot tellurium and selenium extraction, and the salt fraction is used for lead and antimony extraction.

EFFECT: separating of silver, aurum and platinum metals is simplified, silver and aurum loss in water solutions is reduced, and power inputs and labour expenditures are lowered.

1 dwg, 5 ex

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