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Deep metamorphic clay type gold ore leaching method with high recycle rate

A high-recovery, clay-based technology, applied in the field of metallurgy and mineral processing, can solve the problems of large dosage of chemicals, thick clay layer, high surface energy, etc., and achieve the effects of comprehensive utilization of resources, reduced usage, and simple treatment

Inactive Publication Date: 2016-08-24
KUNMING METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Clay-type gold deposits are formed by the accumulation of primary gold deposits after oxidation and weathering and leaching. Due to incomplete oxidation and desiliconization, the clay layer is thick. Using traditional excavators to pile up the ore is easy to be crushed. Solid, poor permeability, resulting in low gold leaching rate
However, the agitation and leaching process is used to treat the ore. Due to the serious mudification of the ore, the ore slime has the characteristics of small mass, large specific surface area, and high surface energy. It has the disadvantages of large dosage of chemicals and long leaching time. Adsorbs the dissolved gold in the pulp, resulting in low gold leaching rate

Method used

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  • Deep metamorphic clay type gold ore leaching method with high recycle rate

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Experimental program
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Effect test

Embodiment 1

[0033] The ore sample belongs to gold-bearing siliceous rock ore with severe weathering and metamorphism, the valuable component is only gold, the grade is 0.80g / t, and the main minerals are limonite, kaolinite, muscovite and quartz, etc. deal with:

[0034] Crush the raw ore and screen with a sieve to make all the ore crushed to 25 mm; divide the crushed raw ore into coarse-grained (+0.45 mm) and fine-grained (-0.45 mm); add 6000 g / t of lime To -0.45mm fine-grained grade, mix well; add 10% fine wood chips by volume to fine-grained grade; add 10% cement by volume to fine-grained grade, and then use granulator to granulate, Ensure that the compressive strength of a single ball is only about 1000N; the coarse-grained ore is piled at the bottom, and the pellets made of the fine-grained grade are placed on the upper part of the coarse-grained grade for heaping; when building the heap, it is pre-buried on the top of the ore heap Dripper. The pellets are piled up, and then cyanide...

Embodiment 2

[0036] The ore sample belongs to heavily weathered quartz feldspar complex vein gold-bearing ore, the valuable component is only gold, the grade is 1.3g / t, and the main minerals are quartz, plagioclase, limonite, muscovite, etc. The above raw ore is subjected to the following process steps deal with:

[0037] Crush the raw ore and screen with a sieve to make all the ore crushed to 20 mm; divide the crushed raw ore into coarse-grained (+0.45 mm) and fine-grained (-0.45 mm); add 5000 g / t of lime To -0.45 mm fine-grained grade, mix well; add 13% fine wood chips to the fine-grained grade; add 15% cement to the fine-grained grade, and then use a granulator to granulate to ensure its single ball The compressive strength is only about 1000N; the coarse-grained ore is piled at the bottom, and the pellets made of the fine-grained grade are placed on the upper part of the coarse-grained grade for heaping; the dripping pipe is pre-buried on the top of the ore heap when building the heap....

Embodiment 3

[0039] The ore sample belongs to the heavily weathered greenstone belt-type gold-bearing ore, the valuable component is only gold, the grade is 1.1g / t, and the main minerals are quartz, potassium feldspar, plagioclase, chlorite, sericite, etc. The following process steps are processed:

[0040] Crush the raw ore and screen with a sieve to make all the ore crushed to -18 mm; divide the crushed raw ore into coarse-grained (+0.45 mm) and fine-grained (-0.45 mm); add 5000 grams / ton of Lime to -0.45 mm fine-grained grade, and mixed; add 15% fine wood chips to the fine-grained grade; add 11% cement to the fine-grained grade, and then use a granulator to granulate to ensure its single The compressive strength of the ball is only about 1000N; the coarse-grained ore is piled at the bottom, and the pellets made of the fine-grained grade are placed on the upper part of the coarse-grained grade for heaping; the dripping pipe is pre-buried on the top of the ore heap when building the heap ...

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Abstract

The invention discloses a deep metamorphic clay type gold ore leaching method with high recycle rate, comprising: breaking raw ore, and adding lime to the broken fine-grain ore; adding thin saw dust to the obtained fine-grain ore, and mixing well; adding cement to the fine-grain ore, and granulating with a granulating machine; piling coarse-grain ore at the bottom, and placing fine-grain pellets above the coarse-grain core for heaping; sprinkling and heap leaching with cyanides to leach out elemental gold. In the heap leaching and gold leaching process, gold in the ore is efficiently recycled. By means of adding the saw dust and cement to granulate and pelletize for heaping and leaching, permeability of the heaped ore and chemicals consumption for slurry are optimized, usage of chemicals is reduced, leaching rate and leaching recycle rate are increased, and residual leachate after leaching is simple to treat. The national policies for clean production and cyclic economy are met, and energy conservation, emission reduction and resource comprehensive utilization are achieved.

Description

technical field [0001] The invention relates to the technical field of metallurgy and ore dressing, in particular to a high-recovery deep metamorphic clay-type gold ore leaching method. Background technique [0002] Since the invention of cyanide leaching gold recovery technology in 1887, cyanide gold extraction has become the main technology of modern gold production and extraction. Since gold is one of the metals discovered and used earlier in human history. Because gold has many advantages such as excellent stability and ductility, it has a wide range of uses in various fields of national economy and national defense construction. With the development of science and technology, the application fields of gold are expanding day by day, which leads to the increasing demand for gold in the world. With the reduction of placer gold and vein gold resources that are easy to mine and select, improving the level of separation of fine-grained and micro-grained gold resources and f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B11/08C22B1/00C22B1/243
CPCC22B11/08C22B1/00C22B1/243C22B11/04
Inventor 梁溢强乔吉波王祖旭杨林
Owner KUNMING METALLURGY INST
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