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Ore separating method for low-grade oxide gold ore

A beneficiation method and a technology for oxidizing ore, which are applied in chemical instruments and methods, wet separation, solid separation, etc., can solve the problems of low ore recovery rate, etc., and achieve the effects of improving comprehensive recovery rate, improving permeability, and shortening leaching cycle.

Inactive Publication Date: 2003-09-10
ZIJIN MINING GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an ideal beneficiation process for low-grade oxidized ore with a high mud content of 0.8-1g / t and a certain amount of coarse-grained gold, so that the recovery rate can be increased from 60-70% to 80%. Above, to solve the problem of low recovery rate of this type of ore

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1: According to the characteristics of the Zijinshan Gold Mine, the beneficiation process adopted is: after the gold-bearing ore is pre-screened, the on-screen product is crushed by a 1050×2100 jaw crusher, and the crushed ore and the under-screen product are crushed by a 2YAH2460 Screening by double-layer vibrating sieve, spraying water on the sieve to wash the ore, the product on the upper sieve enters the PYB1750 cone crusher for re-crushing, and the product under the lower sieve enters the fixed vibrating chute for gravity separation to recover coarse gold in advance; the fixed vibrating chute tailings are collected by 2FG-2 type spiral classifier for classification, the overflow of the classifier is secondarily classified by the ￠500 cyclone; the sand return of the spiral classifier, the sand settling of the cyclone, the product on the lower sieve of the double-layer vibrating screen and the The four products broken by the PYB1750 cone crusher are combined i...

Embodiment 2

[0022] Embodiment 2: Different from Embodiment 1, the sand settling after cyclone classification is returned to the spiral classifier, instead of returning sand with the spiral classifier, the product on the bottom sieve of the double-layer vibrating screen and the product through the PYB1750 garden cone The products broken by the crusher are combined; other processes are the same as in Example 1, and the main production technical indicators obtained are equivalent to Example 1.

[0023] The implementation of the above two embodiments shows that the application of the present invention not only significantly improves the recovery rate, but also lowers the beneficiation cost and has obvious economic and social benefits.

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PUM

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Abstract

The ore separating method for raising the recovering rate of low-grade oxide gold and with high mud content and containnig coarse gold grain has the three kinds of technological process of heap leaching, gravitational separation and charcoal leaching combined. After crushing, washing ore, sieving, secondary crushing and twice grading, the coarse one grains enter heap leaching system directly white the fine ore grains enter the charcoal leaching system; preliminary vibration chute is set before the grading machine to retain coarse gold grains via gravitational separation. The said method has gold core recovering rate obviously higher than that of single heap leaching method and can utilize the precious resource fully.

Description

1. Technical field [0001] The invention relates to a gold beneficiation process, in particular to a gold-bearing low-grade oxidized ore beneficiation process. 2. Background technology [0002] In the current gold production, heap leaching and granulation heap leaching are mainly used for the treatment of gold-bearing low-grade oxidized ores. The former is suitable for ores with low mud content and good permeability, while the latter is suitable for ores with high mud content. For the ore, a certain proportion of cement is added as a binder in the granulation process, and the granulation is solidified before heap leaching. Both belong to a single heap leaching process. [0003] The above two processes have the advantage of low beneficiation cost, but for low-grade oxidized ore containing coarse-grained gold, no matter which of the two processes is used, the ideal recovery rate cannot be obtained, generally only reaching 60-70%. cause waste of precious resources. 3. Content...

Claims

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Application Information

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IPC IPC(8): B03B7/00C22B3/04
CPCY02P10/20
Inventor 陈景河曾宪辉杨云忠邹来昌
Owner ZIJIN MINING GROUP
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