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Process of comprehensively recovering various metals from limonite

A technology for limonite and metal, applied in the field of comprehensive recovery of polymetals, can solve problems such as poor effect and weak magnetic properties, and achieve the effect of increasing the economic benefits of enterprises

Active Publication Date: 2015-04-01
河南黄金产业技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the weak magnetism of limonite, it is not effective to directly recover iron products by magnetic separation

Method used

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  • Process of comprehensively recovering various metals from limonite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The raw ore iron grade is 46.88wt%, gold grade is 0.40g / t, silver grade is 12.45 g / t, copper grade is 0.24wt%, lead content is 0.68wt%, and zinc content is 1.06wt%.

[0021] Such as figure 1 Shown, a kind of technique that comprehensively recovers multiple metals from limonite comprises the following steps:

[0022] (1) Crushing: crush 1200 tons of limonite to -10mm;

[0023] (2) Grinding and grading: The raw ore after crushing is wet-grinded. During the grinding process, a mixture of quicklime and sodium hydroxide with a mass ratio of 2:3 is added to control the pH value of the pulp at 10, and the graded overflow The fineness is -200 mesh and the content accounts for 80wt%;

[0024] (3) Concentration: The ore pulp is concentrated and dehydrated to control the concentration of the ore pulp at 40wt%, and the return water is returned to the grinding and classification operation;

[0025] (4) Cyanide leaching: the pulp enters the carbon slurry operation, and the con...

Embodiment 2

[0032] The raw ore iron grade is 46.88wt%, gold grade is 0.40g / t, silver grade is 12.45 g / t, copper grade is 0.24wt%, lead content is 0.68wt%, and zinc content is 1.06wt%.

[0033] Such as figure 1 Shown, a kind of technique that comprehensively recovers multiple metals from limonite comprises the following steps:

[0034] (1) Crushing: crushing 1500 tons of limonite to -10mm;

[0035] (2) Grinding and grading: The raw ore after crushing is wet-grinded. During the grinding process, a mixture of quicklime and sodium hydroxide with a mass ratio of 2:3 is added to control the pH value of the pulp at 11, and the graded overflow The fineness is -200 mesh and the content accounts for 80wt%;

[0036] (3) Concentration: The ore pulp is concentrated and dehydrated to control the concentration of the ore pulp at 45wt%, and the return water is returned to the grinding and classification operation;

[0037] (4) Cyanide leaching: the pulp enters the carbon slurry operation, and the ...

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Abstract

The invention relates to a process of comprehensively recovering various metals from limonite and belongs to the technical field of comprehensively recovering various metals. The process comprises the following steps: crushing, ore grinding, classifying, concentrating, cyanide leaching, carbon-in-pulp adsorption, pressure filtration, flash magnetization roasting, magnetic separation and flotation, wherein in the magnetic separation phase, an iron concentrate is obtained; and in the flotation phase, a mixed concentrate of gold, silver and copper is obtained. According to the process disclosed by the invention, by adopting the combined concentration and smelting process flow, concomitant gold, silver, copper and iron in the limonite can be recovered, the recovery rates of the gold and the silver are above 75 percent, the recovery rate of the copper is above 40 percent, and the recovery rate of the iron is above 98 percent, so that the mineral resources are fully utilized, and the economical benefit of an enterprise is also increased.

Description

technical field [0001] The invention belongs to the technical field of multi-metal comprehensive recovery, in particular to a process for comprehensive recovery of various metals from limonite. Background technique [0002] In recent years, with the continuous development and utilization of iron ore resources, high-content iron ore and iron ore that are easy to be selected have decreased year by year. According to investigations, there are still a large number of limonite ore resources in my country, and these ores often contain a small amount of gold and silver. , copper, lead, zinc and other associated metals, these metals are often discarded in the beneficiation process, it is necessary to comprehensively recover the associated metals from the perspective of resource utilization and enterprise benefits. Due to the weak magnetism of limonite, it is not effective to directly recover iron products by magnetic separation. With the increasing shortage of mineral resources and ...

Claims

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Application Information

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IPC IPC(8): C22B11/08B03C1/00B03D1/00B03B7/00
Inventor 王安理王青丽李建政冯芳萍张晓利刘海革赵海飞王娟萍
Owner 河南黄金产业技术研究院有限公司
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