Method for extracting rhenium from eluate of flue ash generated by baking enriched ore of molybdenum

A technology of flue ash and molybdenum concentrate, applied in the field of extracting rhenium from molybdenum concentrate roasting flue ash and eluent, can solve the problems of high impurity content, difficulty in obtaining purity, low recovery rate, etc., and achieve high purity Effect

Inactive Publication Date: 2007-10-10
锦州沈宏实业集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the recovery rate of rhenium extracted by a single method is low, the impurity content in the product is high, and it is difficult to obtain rhenium with high purity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1.1. Add water to the flue ash produced by roasting molybdenum concentrate, the liquid-solid ratio is 2:1, the temperature is 100°C, and the time is 2 hours, the rhenium in the flue ash is leached, and then the solid-liquid separation is carried out, and the solid is filtered out Impurities, obtain rhenium-containing leachate;

[0017] 1.2. Neutralize the leachate and eluent with ammonium bicarbonate to PH = 5, so that the molybdenum, iron, copper, lead and other metal ions in it form hydroxides, separate and precipitate from rhenium, and obtain the rhenium-containing extract after filtration. Prefluid;

[0018] 1.3. Add the pre-extraction solution into the extraction tank and extract with the extractant. The organic phase composition of the extractant is 2.5% N235 10% TBP 87.5% kerosene. The ratio of the extraction agent to the pre-extraction solution is O / A=1:2 , the residence time is 1 minute, so that rhenium enters the extractant, which is called rich oil, and the ...

Embodiment 2

[0024] 2.1. Add water to the flue ash produced by roasting molybdenum concentrate, the liquid-solid ratio is 4:1, the temperature is 80°C, and the time is 2.5 hours, the rhenium in the flue ash is leached, and then the solid-liquid separation is carried out, and the solid is filtered out Impurities, obtain rhenium-containing leachate;

[0025] 2.2. Neutralize the leachate and eluent with ammonium bicarbonate to PH = 5, so that the metal ions such as molybdenum, iron, copper, lead, etc. form hydroxides, separate and precipitate from rhenium, and obtain the rhenium-containing extract after filtration. Prefluid;

[0026] 2.3. Add the pre-extraction solution into the extraction tank and extract with the extractant. The organic phase composition of the extractant is 5% N235 20% TBP 75% kerosene. The ratio of the extraction agent to the pre-extraction solution is O / A=1:4 , the residence time is 4 minutes, so that rhenium enters the extractant, which is called rich oil, and the raff...

Embodiment 3

[0032] 3.1. Add water to the flue ash produced by roasting molybdenum concentrate, the liquid-solid ratio is 3:1, the temperature is 90°C, and the time is 3 hours, the rhenium in the flue ash is leached, and then the solid-liquid separation is carried out, and the solid is filtered out Impurities, obtain rhenium-containing leachate;

[0033] 3.2. Neutralize the leaching solution and eluent with ammonium bicarbonate to PH = 5, make the molybdenum, iron, copper, lead and other metal ions form hydroxides, separate and precipitate from rhenium, and obtain the rhenium-containing extract after filtration. Prefluid;

[0034] 3.3. Add the pre-extraction solution into the extraction tank and extract with the extractant. The organic phase composition of the extractant is 4% N235 16% TBP 80% kerosene. The ratio of the extraction agent to the pre-extraction solution is O / A=1:3 , the residence time is 2 minutes, so that rhenium enters the extractant, which is called rich oil, and the raff...

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Abstract

This invention relates to a method for extracting Re from flue dust and tail gas rinsing solution of Mo concentrate calcination. The method comprises: (1) adding water to flue dust, leaching out Re in the flue dust to obtain Re-containing leaching solution; (2) adjusting the pH value of the Re-containing leaching solution and tail gas rinsing solution to 5 with ammonium bicarbonate so that Mo, Fe, Cu and Zn ions are converted into hydroxides, separated from Re and precipitated, and filtering to obtain Re-containing solution for extraction; (3) extracting with extractant so that Re enters into the extractant, which is named enriched oil; (4) back-extracting the enriched oil with 3 N ammonia solution so that Re enters into the back extraction solution; (5) adding the back extraction solution into an ion exchange system so that Re is adsorbed onto the resin; (6) preparing 5-10% ammonium thiocyanate solution, adding ammonia solution to adjust the pH value to 8-9, and desorbing Re adsorbed onto the resin to obtain Re-containing desorption solution; (7) evaporating the desorption solution, concentrating, and crystallizing to obtain ammonium perrhenate product.

Description

technical field [0001] The invention belongs to a method for separating and extracting rhenium, in particular to a method for extracting rhenium from molybdenum concentrate roasting flue ash and eluate. Background technique [0002] Rhenium is an important industrial raw material, which is very expensive. At present, people have not found a suitable mineral for rhenium. It exists as a small element in molybdenite, or as a trace substance in niobite, yttrium yttrium and some magnesium, platinum and uranium ores. Currently, rhenium is generally separated from the roasting gases produced in the production of molybdenum and copper. The usual practice is to obtain rhenium-containing solution first, and then extract rhenium by ion exchange or extraction. The rhenium whiskers are extracted by ion exchange to neutralize the acidic solution to alkalinity. During the neutralization process, the entrainment loss of rhenium is relatively large, because the solution contains a large am...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B61/00C22B3/04C22B3/44C22B3/26C22B7/00
CPCY02P10/20
Inventor 白丹关振波白崇岩
Owner 锦州沈宏实业集团有限公司
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