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A high-voltage electric pulse pretreatment method for strengthening the leaching of refractory gold ore

A high-voltage electric pulse, refractory gold ore technology, applied in grain processing and other directions, can solve problems such as not being applicable, and achieve the effect of saving enterprise costs, shortening time, and increasing fine-grain content.

Active Publication Date: 2018-10-23
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, roasting, wet chemical, pressurized oxidation and biological oxidation methods in the pretreatment methods of refractory gold ore are not suitable for refractory quartz-encapsulated gold ore. Reserves account for a relatively high proportion of

Method used

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  • A high-voltage electric pulse pretreatment method for strengthening the leaching of refractory gold ore
  • A high-voltage electric pulse pretreatment method for strengthening the leaching of refractory gold ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The ore samples used in this example are Carlin-type gold deposits. In this type of gold ore, metal sulfides mainly composed of pyrite, stibnite and arsenopyrite are disseminated in the ore in scattered form, and gold is usually wrapped in sulfide minerals in the form of fine particles or submicroscopic particles. It is also difficult to dissociate and belongs to refractory ore. The chemical composition analysis results are as follows, see Table 1 and Table 2:

[0025] Table 1 The semi-quantitative analysis results of raw ore spectrum

[0026] Analytical components

SiO 2

al 2 o 3

CaO

Fe 2 o 3

K 2 o

content%

57.59

19.98

8.01

4.88

4.17

Analytical components

MgO

SO 3

TiO 2

As 2 o 3

Na 2 o

content%

2.30

1.25

0.67

0.43

0.18

Analytical components

Sb 2 o 3

P 2 o 5

MnO

SrO

WO 3

content%

0.14

0.14

0.13

...

Embodiment 2

[0032] The ore sample used in this embodiment is a certain arsenic-containing refractory gold ore, in which quartz porphyry gold ore accounts for 45% and sandstone-type gold ore accounts for 55%. The results of multi-element analysis and raw ore gold phase analysis are shown in Table 3 and Table 4. It can be seen from Table 3 that the gold grade of this gold mine is 2.38g / t, and the Cu content is 0.09%. higher gold ore. Table 4 shows that the content of exposed and semi-exposed gold in the ore is very small, only 14.29%, and about 80% of the gold is wrapped by sulfide, carbonate and silicate, which brings difficulties to the gold extraction process .

[0033] Table 3 Results of multi-element analysis of raw ore

[0034] element

Aug / t

Agg / t

Cu

Pb

Zn

S

P

K 2 o

content%

2.38

2.0

0.09

0.061

0.030

1.24

0.28

3.16

element

As

Sb

Mo

co

Tc

TF

mn

Na 2 o

content%

...

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Abstract

The invention discloses a high-voltage electric pulse pretreatment method for enhancing the leaching of refractory gold ore, and belongs to the technical field of gold ore mineral processing. This method utilizes the differences in dielectric properties of different minerals in the ore to achieve high-voltage electric pulse crushing pretreatment. The high-voltage electric pulse discharge crushing device selectively crushes the gold-bearing ore, promoting the separation of gold and gangue minerals in the gold-bearing material. Micro-cracks and extended cracks are generated at the interface, which completely dissociates the crystals of gold-containing minerals into single mineral particles, thereby increasing the exposed surface area of ​​gold, thereby increasing the contact probability between cyanide and gold particles, thereby facilitating the leaching rate of gold. fully improved.

Description

technical field [0001] The invention belongs to the technical field of gold ore mineral processing, and in particular relates to a high-voltage electric pulse pretreatment method for strengthening the leaching of refractory gold ores, so as to increase the gold leaching rate of refractory gold ores. Background technique [0002] With technological progress and economic development, the market demand for gold is also increasing. The substantial increase in gold production consumes a large amount of gold ore resources, the average grade of gold ore declines, the easy-to-handle gold ore resources are increasingly exhausted, and the difficult-to-handle gold ore has become an important resource of gold. However, the gold in refractory gold ores is mostly wrapped in fine particles in associated minerals and gangue minerals, which cannot be in contact with cyanide solution and dissolved oxygen. This is the main reason why some gold cannot be extracted directly by cyanide. Moreover...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C19/18B02C23/14B02C23/10C22B11/08
CPCB02C19/18B02C23/10B02C23/14B02C2019/183C22B11/08
Inventor 高鹏韩跃新李艳军孙永升袁帅李宏达
Owner NORTHEASTERN UNIV LIAONING
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