High-voltage electric pulse pretreatment method for intensifying leaching of difficult-to-treat gold ore

A high-voltage electric pulse, refractory gold mine technology, applied in grain processing and other directions, can solve problems such as not being applicable, and achieve the effect of saving enterprise costs, improving the degree of monomer dissociation, and increasing enterprise profits

Active Publication Date: 2017-06-13
NORTHEASTERN UNIV
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  • 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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  • High-voltage electric pulse pretreatment method for intensifying leaching of difficult-to-treat gold ore
  • High-voltage electric pulse pretreatment method for intensifying leaching of difficult-to-treat gold ore

Examples

Experimental program
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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 0.034 0.029 Analytical components ZnO...

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% 0.87 0.21 0.0008 0.001 1.52 3.40 0.086 0.54 ...

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Abstract

The invention discloses a high-voltage electric pulse pretreatment method for intensifying the leaching of difficult-to-treat gold ore, and belongs to the technical field of the processing of minerals of gold ore. According to the method, the high-voltage electric pulse crushing pretreatment is realized by utilizing the differences of the dielectric properties of different minerals in ore; a high-voltage electric pulse discharge crushing device is used for carrying out selective crushing on gold-containing ore; gold and a gangue mineral in a gold-containing material are prompted to generate a micro crack and a running crack at an interface; a crystal of a gold-containing mineral is completely dissociated into monomer mineral particles; in this way, the exposed surface area of the gold is increased; therefore, the contact probability of cyanide and a gold grain is increased, so that the sufficient improvement of the leaching rate of the gold is facilitated.

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 Applications(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
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