CN104178627A - High-pressure pretreatment system for gold ores - Google Patents
High-pressure pretreatment system for gold ores Download PDFInfo
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- CN104178627A CN104178627A CN201410414647.9A CN201410414647A CN104178627A CN 104178627 A CN104178627 A CN 104178627A CN 201410414647 A CN201410414647 A CN 201410414647A CN 104178627 A CN104178627 A CN 104178627A
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- ore pulp
- gold
- autoclave
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention discloses a high-pressure pretreatment system for gold ores. The high-pressure pretreatment system comprises a material mixing tank, a feeding pump, a heat exchanger, an oxygen gas stirring high-pressure kettle and a tubular high-pressure kettle which are communicated in sequence, wherein an ore pulp inlet of the oxygen gas stirring high-pressure kettle is communicated with a filter press; an outlet of the tubular high-pressure kettle is communicated with an ore pulp inlet of a first-section flash evaporation tank; an ore pulp outlet of the first-section flash evaporation tank is communicated with an ore pulp inlet of a second-section flash evaporation tank; a gas outlet of the first-section flash evaporation tank is communicated with a gas inlet of the heat exchanger; an ore pulp outlet of the second-section flash evaporation tank is communicated with an inlet of the filter press; a gas outlet of the second-section flash evaporation tank is communicated with an inlet of an absorption tank; and an outlet of the absorption tank is communicated to the material mixing tank. The system can be used for treating gold cores with As less than 22% and C less than 5%, which are difficult to treat. In a high-temperature high-pressure oxidation environment, the high-pressure pretreatment system for gold ores can be used for effectively realizing gold packaging by pyrite as well as gold grabbing effects on carbons, and can be used for removing a great deal of arsenic in a pretreatment process.
Description
Technical field
The present invention relates to a kind of pre-press system of gold mine, be particularly useful for metallurgical genus of difficulty containing the high carbonaceous thing of high arsenic.
Background technology
Refractory Au-ores reserves account for 30% of world's gold mine total reserves.Along with the day by day exhaustion of world's gold ore resource, Refractory Au-ores is paid close attention to by people gradually.At China's Refractory Au-ores, mainly take card Carlin-type Gold Deposit as main, wherein the gold mine intractability of the high carbonaceous thing of high arsenic is maximum.Such ore adopts conventional cyanidation gold extraction technology to process, and the leaching yield of gold is very low.Therefore such ore need first carry out pre-treatment, then carry out again cyaniding.
At present, in the pretreatment process of such mineral, pressure oxidation method because of do not exist the advantages such as problem of environmental pollution, pretreated gold mine cyaniding efficiency is high, gold ore pretreatment scale is changeable compared with its method method have clear superiority gradually Bei Ge manufacturing enterprise adopt.Its pressure exerting device is also constantly modified along with the development of pressure oxidation preconditioning technique.
In such difficult-treating gold mine, gold is often contaminated in the sulphide oress such as mispickel, pyrite with form micro-or inferior micro-even Lattice Gold.By pressure oxidation process, thereby the sulphide ores oxidation in gold ore can be conducive to cyanating solution and golden contacting.The contingent principal reaction in oxidising process of such gold ore is as follows:
2FeS
2+2H
2SO
4+O
2＝2FeSO
4+2S
0+2H
2O
S
0+H
2O+3/2O
2＝H
2SO
4
FeS
2+Fe
2(SO
4)
3＝3FeSO
4+S
0
2FeSO
4+H
2SO
4+1/2O
2＝Fe
2(SO
4)
3+H
2O
When temperature of reaction is within the scope of 100～150 ℃, the oxidized formation one deck hydrophobicity elementary sulfur film in gold ore surface hinders cyanating solution and golden contacting.This elementary sulfur film is difficult to destroyed in sulfuric acid immersion liquid, need add HNO
3and Fe
3+deng catalyzer, accelerate the destruction of sulphur film.Under this processing environment, the consideration based on material corrosion resisting property, reactor material must adopt pure titanium or titanium composition board just can meet service requirements.Meanwhile, after this pre-treatment, also need to carry out again the pre-treatment of lime alkalescence further to remove the elementary sulfur film of mineral surface remnants.This also makes preprocessing process tediously long, complicated operation, and processing cost rises.
When pretreatment temperature reaches 170～190 ℃, the sulphur generating in gold ore oxidising process is completely oxidized, and reaction can a step directly complete, thereby has simplified operation.But so harsh processing environment has proposed high requirement for the solidity to corrosion of the material of reactor and corollary system.Meanwhile, in the treatment time (2～4h) that this treatment process need be longer, hindered to a certain extent the raising of manufacturing enterprise's economic benefit.
Summary of the invention
The object of the present invention is to provide a kind of pre-press system of gold mine, to overcome deficiency of the prior art.
For achieving the above object, the invention provides following technical scheme:
The embodiment of the invention discloses a kind of pre-press system of gold mine, comprise the mixing tank for coating colors being communicated with successively, feeding pump, interchanger, oxygen agitated autoclave and tubular type autoclave, the ore pulp entrance of described oxygen agitated autoclave is communicated with pressure filter, the outlet of described tubular type autoclave is communicated with the ore pulp import of one section of flash drum, the ore pulp outlet of described one section of flash drum is communicated with the ore pulp entrance of two sections of flash drums, the pneumatic outlet of described one section of flash drum is communicated with the gas inlet of interchanger, described two sections of flash drum ore pulps outlet is communicated with pressure filter entrance, the pneumatic outlet of described two sections of flash drums is communicated with tourie entrance, the outlet of described tourie is communicated in described mixing tank for coating colors.
Preferably, in the pre-press system of above-mentioned gold mine, described oxygen agitated autoclave material is 316L type stainless steel, and its kettle comprises cell body, pipe core, oviduct, downtake, nozzle, bottom land and air chamber.
Preferably, in the pre-press system of above-mentioned gold mine, the diameter of described pipe core is 0.2～1m.
Preferably, in the pre-press system of above-mentioned gold mine, the material of described tubular type autoclave is 316L type stainless steel.
Preferably, in the pre-press system of above-mentioned gold mine, described feeding pump is reciprocation pump.
Preferably, in the pre-press system of above-mentioned gold mine, the material of described reciprocation pump is 316L type stainless steel.
Compared with prior art, the invention has the advantages that: this system has that gold ore pre-treatment speed is fast, processing efficiency is high, to the advantage such as equipment and materials requirement is low.Meanwhile, due to its efficient oxidation environment having and the feature such as processing environment is totally-enclosed, can process containing arsenic up to 22% and carbon containing up to 5% gold floatation concentrate.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, the accompanying drawing the following describes is only some embodiment that record in the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Figure 1 shows that the principle schematic of the pre-press system of gold mine in the specific embodiment of the invention;
Figure 2 shows that the structural representation that is oxidized agitated autoclave in the specific embodiment of the invention;
Figure 3 shows that the structural representation of tubular type autoclave in the specific embodiment of the invention.
Embodiment
The embodiment of the invention discloses a kind of pre-press system of gold mine, it comprises mixing tank for coating colors, feeding pump, oxygen agitated autoclave, tubular type autoclave, flasher and tail gas absorption tank.
This system is mainly used in the pre-treatment in the difficult metallurgical ore deposit of the high charcoal of high arsenic, and the difficult metallurgical ore deposit of the high charcoal of high arsenic major impurity composition is As<22%, C<5%.
Its formation material of oxygen agitated autoclave is 316L type stainless steel, and kettle is comprised of cell body, pipe core, oviduct, downtake, nozzle, bottom land and air chamber.Pipe core coordinates with nozzle, has the effect that the gas lift of making stirs ore pulp.Oxygen flow 50～200m3/t ore deposit, center caliber 0.2～1m, residence time <5min.
Its formation material of tubular type autoclave is 316L type stainless steel, and flow rate of pulp is 0.01～2m/s, center caliber 0.2～1m, residence time <5min.
Its formation material of feeding pump is the stainless reciprocation pump of 316L type.
Its formation material of flasher is 316L type stainless steel, and in integrated system, supporting flasher number is 1～3, and mode is series connection.
The environment for use of tubular type autoclave and pneumatic blending autoclave: nitric acid 50～100g/L, sulfuric acid 50～200g/L, 150～220 ℃ of temperature of reaction, reaction pressure 1～3MPa, ore pulp liquid-solid ratio 3～10, oxidization time <10min.
In tail gas absorption tank, absorption liquid used is 0.1～1%H
2o
2solution.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is described in detail, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, the every other embodiment that those of ordinary skills obtain under the prerequisite of not making creative work, belongs to the scope of protection of the invention.
Shown in ginseng Fig. 1 to 3, the pre-press system of gold mine comprises: mixing tank for coating colors, feeding pump, interchanger, oxygen agitated autoclave, tubular type autoclave, one section of flash drum, two sections of flash drums, tourie and pressure filter.
The ore pulp entrance of oxygen agitated autoclave 1 is communicated with the outlet of interchanger ore pulp and pressure filter 5 filtrate outlets, and the gas inlet of oxygen agitated autoclave 1 is communicated with oxygen row, and the ore pulp outlet of oxygen agitated autoclave 1 is communicated with the entrance of tubular type autoclave 2; The outlet of tubular type autoclave 2 is communicated with the ore pulp import of one section of flash drum 3; The ore pulp outlet of one section of flash drum 1 is communicated with the ore pulp entrance of two sections of flash drums 2, and the pneumatic outlet of one section of flash drum 1 is communicated with interchanger gas inlet; Two sections of flash drum 2 ore pulp outlets are communicated with pressure filter entrance, and two sections of flash drum 2 pneumatic outlets are communicated with tourie entrance.
In the present invention, the coupling of oxygen agitated autoclave and tubular type still has improved oxygen rate of utilization and the reaction process mass-and heat-transfer efficiency in preprocessing process greatly, and the nitric acid adding in leaching environment when pretreatment temperature reaches 170～190 ℃ simultaneously can make pre-treating speed significantly increase as catalyzer.And metal erosion experiment confirms at HNO
3-H
2sO
4-H
2in O system, the erosion rate of 316L type stainless steel under 100 ℃ and boiling temperature is all no more than 0.1mm/a, therefore in this system, uses 316L type stainless steel can meet production requirement as the material of autoclave and support equipment.
It should be noted that, in this article, relational terms such as the first and second grades is only used for an entity or operation to separate with another entity or operational zone, and not necessarily requires or imply and between these entities or operation, have the relation of any this reality or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby the process, method, article or the equipment that make to comprise a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or be also included as the intrinsic key element of this process, method, article or equipment.The in the situation that of more restrictions not, the key element being limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.
The above is only the specific embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. the pre-press system of a gold mine, it is characterized in that, comprise the mixing tank for coating colors being communicated with successively, feeding pump, interchanger, oxygen agitated autoclave and tubular type autoclave, the ore pulp entrance of described oxygen agitated autoclave is communicated with pressure filter, the outlet of described tubular type autoclave is communicated with the ore pulp import of one section of flash drum, the ore pulp outlet of described one section of flash drum is communicated with the ore pulp entrance of two sections of flash drums, the pneumatic outlet of described one section of flash drum is communicated with the gas inlet of interchanger, described two sections of flash drum ore pulps outlet is communicated with pressure filter entrance, the pneumatic outlet of described two sections of flash drums is communicated with tourie entrance, the outlet of described tourie is communicated in described mixing tank for coating colors.
2. the pre-press system of gold mine according to claim 1, is characterized in that: described oxygen agitated autoclave material is 316L type stainless steel, and its kettle comprises cell body, pipe core, oviduct, downtake, nozzle, bottom land and air chamber.
3. the pre-press system of gold mine according to claim 2, is characterized in that: the diameter of described pipe core is 0.2～1m.
4. the pre-press system of gold mine according to claim 1, is characterized in that: the material of described tubular type autoclave is 316L type stainless steel.
5. the pre-press system of gold mine according to claim 1, is characterized in that: described feeding pump is reciprocation pump.
6. the pre-press system of gold mine according to claim 5, is characterized in that: the material of described reciprocation pump is 316L type stainless steel.
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|---|---|---|---|
| CN201410414647.9A CN104178627B (en) | 2014-08-21 | 2014-08-21 | A kind of pre-press system of gold mine |
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| CN201410414647.9A CN104178627B (en) | 2014-08-21 | 2014-08-21 | A kind of pre-press system of gold mine |
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| CN104178627A true CN104178627A (en) | 2014-12-03 |
| CN104178627B CN104178627B (en) | 2016-07-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113846213A (en) * | 2021-09-24 | 2021-12-28 | 中国恩菲工程技术有限公司 | Refractory gold ore processing system |
| WO2022217350A1 (en) * | 2021-04-12 | 2022-10-20 | Hatch Ltd. | Hydrometallurgical treatment of ores or concentrates for removal of preg-robbing organic carbon material |
Citations (3)
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|---|---|---|---|---|
| CN203530398U (en) * | 2013-10-09 | 2014-04-09 | 北京矿冶研究总院 | Laterite-nickel ore jointly leaches system |
| CN103952546A (en) * | 2014-05-09 | 2014-07-30 | 长沙有色冶金设计研究院有限公司 | Steam heating device and method for pressurized oxygen leaching of zinc sulfide concentrate |
| CN204039461U (en) * | 2014-08-21 | 2014-12-24 | 江苏申港锅炉有限公司 | A kind of pre-press system of gold mine |
-
2014
- 2014-08-21 CN CN201410414647.9A patent/CN104178627B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203530398U (en) * | 2013-10-09 | 2014-04-09 | 北京矿冶研究总院 | Laterite-nickel ore jointly leaches system |
| CN103952546A (en) * | 2014-05-09 | 2014-07-30 | 长沙有色冶金设计研究院有限公司 | Steam heating device and method for pressurized oxygen leaching of zinc sulfide concentrate |
| CN204039461U (en) * | 2014-08-21 | 2014-12-24 | 江苏申港锅炉有限公司 | A kind of pre-press system of gold mine |
Non-Patent Citations (1)
| Title |
|---|
| 中国科学院化工冶金研究所编译: "《黄金提取技术（译文集）》", 30 April 1991, 北京大学出版社出版 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022217350A1 (en) * | 2021-04-12 | 2022-10-20 | Hatch Ltd. | Hydrometallurgical treatment of ores or concentrates for removal of preg-robbing organic carbon material |
| CN113846213A (en) * | 2021-09-24 | 2021-12-28 | 中国恩菲工程技术有限公司 | Refractory gold ore processing system |
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| Publication number | Publication date |
|---|---|
| CN104178627B (en) | 2016-07-06 |
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