Method for improving recovery rate of copper nickel associated precious metals

A precious metal and recovery technology, applied in chemical instruments and methods, wet separation, solid separation, etc., can solve the problems of low recovery rate of rare precious metals, low recovery rate of precious metals, etc., to ensure normal production and stable operation, recovery rate improved effect

Inactive Publication Date: 2013-03-20
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the production of non-ferrous industry, due to the close association of precious metals and useful minerals, most of them are embedded in gangue in the form of combination, resulting in a low recovery rate of precious metals
Compared with the counterparts in advanced developed countries, the recovery rate of rare and precious metals is about 5-8% lower. The main reason is that the precious metals enter the subsequent process as by-products of the main metal copper and nickel in the beneficiation process of copper-nickel ore, and there is no separate separation. Craftsmanship of precious metals

Method used

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  • Method for improving recovery rate of copper nickel associated precious metals

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Grinding the raw ore, when the weight percentage of the ore particles with a particle size of ≤200 mesh in the grinding pulp reaches 65%~70% of the total weight of the pulp, and the weight percentage concentration of the pulp is 67%~73%, add water through the ball mill to reduce the weight percentage When the concentration drops to 40%-45%, the slurry pump is transported to the agitation tank for buffering, a part of the slurry is returned to the original system through the overflow of the agitation tank, and the other part enters the Nelson centrifugal concentrator for separation, while ensuring water supply When the pressure is 276~690kpa and the acceleration of gravity reaches 110G, the sorting time is 35 minutes. Get Nelson concentrate (referred to as Nielsen) and Nielsen tailings (abbreviated as Niwei). Among them, Nijing is conveyed to the DUZ automatic intermittent horizontal belt vacuum filter for dehydration, and the obtained concentrate products with a moistur...

Embodiment 2

[0023] Grinding the raw ore, when the weight percentage of the ore particles with a particle size ≤ 200 mesh in the grinding pulp reaches 65% to 70% of the total weight of the pulp, and the weight percentage concentration of the pulp is 70% to 73%, classify to obtain overflow and Grit and two products; the overflow enters the flotation operation, and the grit as the raw ore of Nelson gravity enters the stirring tank for slurry adjustment. When the concentration is adjusted to 55~60%, a part of the pulp returns through the overflow of the stirring tank The other part of the original system enters the Nelson centrifugal concentrator for separation, while ensuring that the water supply pressure is 276~690kpa, and when the acceleration of gravity reaches 130G, the separation time is 45 minutes. Two products are obtained: Nielsen concentrate (referred to as Nielsen) and Nielsen tailings (abbreviated as Niwei). Among them, Nijing is conveyed to the DUZ automatic intermittent horizon...

Embodiment 3

[0026] Grinding the raw ore, when the weight percentage of the ore particles with a particle size ≤ 200 mesh in the grinding pulp reaches 65% to 70% of the total weight of the pulp, and the weight percentage concentration of the pulp is 70% to 73%, classify to obtain overflow and Grit and two products; the overflow enters the flotation operation, and the grit as the raw ore of Nelson gravity enters the stirring tank for slurry adjustment. When the concentration is adjusted to 45%~55%, a part of the pulp passes through the overflow of the stirring tank. Return to the original system, and the other part enters the Nelson centrifugal concentrator for separation, while ensuring that the water supply pressure is 276~690kpa, and when the acceleration of gravity reaches 120G, the separation time is 40 minutes. Get Nelson concentrate (referred to as Nielsen) and Nielsen tailings (abbreviated as Niwei). Among them, Nijing is conveyed to the DUZ automatic intermittent horizontal belt va...

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Abstract

The invention provides a method for improving the recovery rate of high copper nickel associated precious metal. A Nielsen centrifugal ore separator is utilized for a section of secondary grading sand setting and a section of secondary ball milling ore discharge to recover sperrylite separated in a monomer mode and ore containing the precious metals such as gold and silver. The technical principles include that in a high power strengthened gravity field, the gravity difference of ores large in specific gravity and ores small in specific gravity is enormously amplified so as to enable separation between the heavy oars and the light oars to be easier than that in a natural gravity field, and therefore ore particles sorted according to specific gravities is realized. A part of precious metals are enriched and recovered in advance, and ore concentrate after ore dressing directly enters an alloy vulcanizing oven to be processed, and therefore the recovery rate of the gold, the silver and other precious metals is improved by a large margin, and normal production and stable operation of an original production system can be ensured. Compared with the indexes of the original production system, concentrate grades of precious metals aurum and platinum are respectively improved by 1.1g / t and 2.0g / t, and recovery rates of the precious metals aurum and platinum are respectively improved by 5% and 10%.

Description

technical field [0001] The invention belongs to the technical field of ore dressing, and relates to a method for improving the recovery rate of precious metals associated with copper-nickel ore. Background technique [0002] The nickel ore in my country is mainly copper-nickel sulfide ore, often associated with precious metals such as Au and Ag. According to the flotation characteristics of nickel sulfide ore and the flotability of minerals, flotation is generally used to enrich and recover nickel and associated metals. In the production of non-ferrous industry, due to the close association of precious metals and useful minerals, most of them are embedded in gangue in the form of combination, resulting in a low recovery rate of precious metals. Compared with the counterparts in advanced developed countries, the recovery rate of rare and precious metals is about 5-8% lower. The main reason is that the precious metals enter the subsequent process as by-products of the main me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03B1/00B03D1/00
Inventor 高红崔忠远殷建强赖秋生苏晓晖陆斌刚刘立彦周虎英
Owner JINCHUAN GROUP LIMITED
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