Method for recovering platinum group metal from ferrous nickel electrolysis anolyte

A technology of platinum group metals and anolyte, applied in the direction of improving process efficiency, etc., can solve the problem of difficult recovery of precious metals, achieve the effects of reducing the content of precious metals, low production costs, and easy implementation

Active Publication Date: 2014-09-03
JINCHUAN GROUP LIMITED
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a method for recovering platinum group metals in iron-containing nickel electrolysis anolyte, which can solve the problem that precious metals are difficult to recover in jarosite slag containing precious metals

Method used

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  • Method for recovering platinum group metal from ferrous nickel electrolysis anolyte

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Experimental program
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Effect test

Embodiment 1

[0016] Containing Ni68g / L, Cu0.23g / L, Co0.31g / L, Fe0.7g / L and a small amount of platinum group metals, the pH of the nickel electrolysis anolyte of 1.0 and the primary iron slag slurry obtained after iron removal and filtration are as follows Ni13.52%, Cu8.76%, Fe10.45%, platinum group metals total 8.58g / t. Based on the weight of the primary iron slag slurry, add sulfuric acid 100kg / t, acid dissolve the primary iron slag slurry at 30°C for 10 minutes, control the pH at the end point of acid dissolution between 1.0 and 2.0, then add sodium sulfide, add Amount of 8.0kg / t (based on the weight of primary iron slag ore slurry), react at 30°C for 30 minutes, and then use a filter medium with a pore size of 0.5 to 10 microns for precision filtration; the obtained filter residue has a platinum, palladium, and gold content of 123 g / t , enriched by 15 times, the precious metal yield was 97.6%, and the precious metal content of the jarosite slag obtained by removing iron from the filtrat...

Embodiment 2

[0018] Containing Ni63g / L, Cu0.18g / L, Co0.24g / L, Fe0.5g / L and a small amount of platinum group metals, the nickel electrolysis anolyte with a pH of 1.2 and the primary iron slag slurry obtained after iron removal and filtration are as follows: Ni16.11%, Cu9.35%, Fe8.78%, platinum group metals total 7.89g / t. Based on the weight of the primary iron slag slurry, add sulfuric acid 95kg / t, acid-dissolve the primary iron slag slurry at 20°C for 15 minutes, and control the pH at the end point of acid dissolution between 1.0 and 2.0, then add ammonium sulfide, add Amount of 4kg / t (based on the weight of primary iron slag ore slurry), reacted at 40°C for 180min, and then used a filter medium with a pore size of 0.5 to 10 microns for precision filtration; the obtained filter residue had a platinum, palladium, and gold content of 118 g / t. The enrichment was 15 times, the yield of precious metal was 98.1%, and the precious metal content of jarosite slag obtained by removing iron from the ...

Embodiment 3

[0020] Containing Ni73g / L, Cu0.35g / L, Co0.27g / L, Fe0.48g / L and a small amount of platinum group metals, the nickel electrolysis anolyte with a pH of 1.0 and the primary iron slag slurry obtained after iron removal and filtration are as follows Ni10.67%, Cu8.68%, Fe13.01%, platinum group metals total 10.37g / t. Based on the weight of the primary iron slag slurry, add sulfuric acid 108kg / t, acid-dissolve the primary iron slag slurry at 40°C for 20 minutes, and control the pH at the end point of acid dissolution between 1.0 and 2.0, then add sodium sulfide, add Amount of 12kg / t (based on the weight of primary iron slag ore slurry), after reacting at 50°C for 60 minutes, use a filter medium with a pore size of 0.5 to 10 microns for precision filtration; the obtained filter residue has a platinum palladium content of 138g / t, rich in The concentration is 13.3 times, the precious metal yield is 96.11%, and the precious metal content of the jarosite slag obtained by removing iron from ...

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Abstract

The invention relates to a method for recovering platinum group metals from iron-containing nickel electrolysis anolyte. The process flow is as follows: first neutralize and remove iron from the nickel electrolysis anolyte, return the filtrate to the production system, and obtain primary iron slag Add vulcanizing agent after acid dissolution at 20℃~50℃, after precision filtration, more than 96% of the precious metals are enriched in the filter residue, and the jarosite slag obtained after the filtrate removes iron by the jarosite method has a precious metal content of less than 1.0g / t. The invention solves the problem that the noble metal is lost in the anolyte and is difficult to recover during the electrolytic refining process of the nickel anode containing the noble metal, and has no influence on the existing production, can ensure the quality of the electrolytic nickel, and has simple process, low production cost, and easy implement.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy of nonferrous metals, and relates to the recovery of precious metals in nickel electrolysis anolyte, in particular to a method for recovering platinum group metals in iron-containing nickel electrolysis anolyte. Background technique [0002] Precious metals are relatively common associated minerals in nickel-copper sulfide ores. Generally, the content is relatively low. Most of them are recovered from the intermediate products produced in the smelting process. The dispersion is serious and the recovery rate is not high. Among them, the nickel anode plate is an intermediate product produced by enrichment, smelting and separation of nickel-copper sulfide minerals, and its content (%): Ni60.0~70.0, Cu2.0~4.0, Co0.6~1.5, Fe1. 5~3.0, the content of platinum and palladium is about 10g / t~20g / t. During the electrolytic refining process of nickel anode plate, the mixed acid electrolyte [Cl - 〕The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B11/00C22B3/44
CPCY02P10/20
Inventor 刘玉强张晗朱纪念陈国举豆银丽张鹏孙渊君赵秀丽
Owner JINCHUAN GROUP LIMITED
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