CN101942559A - Gold extracting process through low-temperature roasting - Google Patents
Gold extracting process through low-temperature roasting Download PDFInfo
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- CN101942559A CN101942559A CN 201010276474 CN201010276474A CN101942559A CN 101942559 A CN101942559 A CN 101942559A CN 201010276474 CN201010276474 CN 201010276474 CN 201010276474 A CN201010276474 A CN 201010276474A CN 101942559 A CN101942559 A CN 101942559A
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- roasting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
- C22B11/08—Obtaining noble metals by cyaniding
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- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a gold extracting process through low-temperature roasting, which comprises the following steps of: feeding a material prepared for roasting to a roasting furnace through a feeder, and evenly feeding air supplied by an air supply port to a material layer; controlling roasting temperature of the roasting furnace to be 350-550 DEG C and roasting time to be 30-180 min according to the properties of the material, discharging the roasted material from a material discharge port to obtain calcine, and extracting the gold from the calcine through a conventional cyaniding process and a smelting process. Through low-temperature roasting, certain harmful minerals in the gold-containing material are oxidized and removed, the gold is exposed and dissociated, and meanwhile, the production of excessive metal oxides is avoided, thereby satisfactory roasting effect is achieved, and the recovery rate of the gold is increased. The invention solves the problem of difficult low-temperature roasting in the conventional fluidized bed roasting process, satisfies different requirements of the material for roasting conditions in the roasting process and increases the leaching rate of the gold.
Description
Technical field
The present invention relates to a kind of sinter process of refractory gold ore, particularly a kind of low-temperature bake gold extraction technology.
Background technology
Along with the fast development of China's gold industry, be easy to the gold ore resource exhaustion day by day that direct cyaniding is extracted, the difficult-treating gold mine resource has become the main raw material of gold industry from now on.Therefore, sinter process is applied rapidly in gold production and develops.
The sinter process that obtains more application in recent years is mainly conventional fluidized-bed roasting process, this technology has the unrivaled advantage of many other technologies, as the intensity of roasting height, the residual sulphur of slag is low, the siege temperature is even, furnace binding is simple, no-rotary part etc., but also exists limitation in actual production.Conventional fluidized-bed roasting process is when roasted concentrate, be that sulphur oxidizing reaction heat release by concentrate self reaches and keeps certain maturing temperature, when the lower concentrate of roasting raw ore and some sulfur-bearings, fuel such as needs interpolation coal are kept maturing temperature, because sulphur and coal burning-point height, therefore maturing temperature is higher, so this method only is applicable to the material of those suitable high-temperature roastings.For some materials that needs low-temperature bake, maturing temperature is too high, though can make some toxic mineral oxidation removals, has also generated many metal oxides that are unfavorable for that gold leaches simultaneously, has reduced the golden rate of recovery.The low-temperature bake gold extraction technology can effectively be avoided generating too much metal oxide in the roasting process, has improved the golden rate of recovery.
Technical scheme
The object of the present invention is to provide a kind of low-temperature bake gold extraction technology, this sinter process has solved the problem that conventional fluidized bed roasting gold extraction technology is difficult for low-temperature bake.
Technical scheme of the present invention is: the material of ready desire roasting is fed stoving oven by material feeder, and the gas of being gone into by the air feed confession feeds material bed equably; The maturing temperature of controlling stoving oven according to the character of material is 350 ℃～550 ℃, and roasting time is 30 minutes～180 minutes, and the material after the roasting is discharged from discharge gate becomes calcining, and the calcining that obtains extracts gold by conventional cyanidation technology and smelting technology.By low-temperature bake, the oxidized removal of some toxic minerals in the gold-bearing material, gold exposes and dissociates, and can avoid generating simultaneously too much metal oxide, obtains satisfied roasting effect, has improved the golden rate of recovery.
Concrete steps of the present invention are:
(1) the roasting material is prepared
The grinding particle size of control ore is between P60%=0.015mm～P95%=0.043mm;
(2) roasting operation
Ready material is fed stoving oven by material feeder, the gas of being gone into by the air feed confession feeds material bed equably, according to the requirement of ore character, conditions such as strict control material delivery rate, maturing temperature, oxygen-supplying amount, after material has kept certain temperature and time, discharge from discharge gate, the flue gas that roasting produces is discharged by flue;
(3) Jin extraction
Calcining extracts gold by conventional cyanidation technology and smelting technology.
The invention has the beneficial effects as follows: solved the problem that conventional fluidized-bed roasting process is difficult for low-temperature bake, satisfied that material has improved golden leaching yield to the different requirements of roasting condition in the roasting process.
Embodiment:
Embodiment 1:
(1), southwest certain gold mine MC thing carbonaceous particulate dip-dye type refractory gold ore, control grinding fineness be-0.074mm that content is 82% by weight percentage;
(2), air after the hotblast stove preheating, feed fluidizing reactor, the control maturing temperature is 450 ℃, roasting time is 60 minutes, the calcining sulfur oxidation rate is 82.78%, the organic carbon decreasing ratio is 88.83%;
(3), calcining is through conventional cyanidation technology, gold leaching rate is increased to 81.06% by 1.90%.
Embodiment 2:
(1), northeast gold ore flotation gold ore, fineness is-0.074mm that content is 85% by weight percentage;
(2), in the stoving oven that utilizes globars heating bubbling air, the control maturing temperature is 500 ℃, roasting time is 90 minutes, the calcining sulfur oxidation rate is 96.76%;
(3), calcining is through conventional cyanidation technology, gold leaching rate is increased to 91.11% by 65.54%.
Embodiment 3:
(1), southwest certain gold mine poor sulfide carbonaceous micro-grain impregnation difficult gold containing ore, the control grinding fineness is-0.074mm that content is 80% by weight percentage;
(2), in microwave baking furnace bubbling air, be 500 ℃ by microwave radiation ore control maturing temperature, roasting time is 45 minutes, sulfur oxidation rate is 95.10%, the organic carbon decreasing ratio is 84.91%;
(3), calcining is through conventional cyanidation technology, gold leaching rate brings up to 81.12% by 4.83%.
Claims (1)
1. low-temperature bake gold extraction technology, this technology are that the material with ready desire roasting feeds stoving oven by material feeder, and the gas of being gone into by the air feed confession feeds material bed equably; The maturing temperature of controlling stoving oven according to the character of material is 350 ℃～550 ℃, and roasting time is 30 minutes～180 minutes, and the material after the roasting is discharged from discharge gate becomes calcining, and the calcining that obtains extracts gold by conventional cyanidation technology and smelting technology.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010276474 CN101942559A (en) | 2010-09-09 | 2010-09-09 | Gold extracting process through low-temperature roasting |
| PCT/CN2010/001726 WO2012031379A1 (en) | 2010-09-09 | 2010-10-29 | Method for extracting gold through low-temperature roasting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010276474 CN101942559A (en) | 2010-09-09 | 2010-09-09 | Gold extracting process through low-temperature roasting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101942559A true CN101942559A (en) | 2011-01-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010276474 Pending CN101942559A (en) | 2010-09-09 | 2010-09-09 | Gold extracting process through low-temperature roasting |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101942559A (en) |
| WO (1) | WO2012031379A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102560084A (en) * | 2012-01-14 | 2012-07-11 | 长春黄金设计院 | Arsenic removal process containing post-combustion technology |
| CN105219950A (en) * | 2014-06-17 | 2016-01-06 | 武汉理工大学 | A kind of sulfate slag puies forward golden roasting pretreatment method |
| CN107034353A (en) * | 2017-04-27 | 2017-08-11 | 中南大学 | A kind of method of low-temperature bake acidleach dissociation gold |
| CN107199116A (en) * | 2017-06-09 | 2017-09-26 | 烟台金奥冶炼有限公司 | A kind of carbon containing Gold Concentrate under Normal Pressure two-stage roasting slag selects carbon method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102766761B (en) * | 2012-08-20 | 2014-02-26 | 长沙矿冶研究院有限责任公司 | Method for extracting vanadium pentoxide from vanadium containing clay ores |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0622467A1 (en) * | 1993-04-30 | 1994-11-02 | Metallgesellschaft Ag | Process for roasting refractory gold ores |
| CN1161379A (en) * | 1997-01-15 | 1997-10-08 | 核工业北京化工冶金研究院 | Method for extracting gold from refractory ore |
| CN101285126A (en) * | 2008-06-05 | 2008-10-15 | 长春黄金研究院 | Gold extraction process with low pollution and high recovery for refractory gold concentrate |
-
2010
- 2010-09-09 CN CN 201010276474 patent/CN101942559A/en active Pending
- 2010-10-29 WO PCT/CN2010/001726 patent/WO2012031379A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0622467A1 (en) * | 1993-04-30 | 1994-11-02 | Metallgesellschaft Ag | Process for roasting refractory gold ores |
| CN1161379A (en) * | 1997-01-15 | 1997-10-08 | 核工业北京化工冶金研究院 | Method for extracting gold from refractory ore |
| CN101285126A (en) * | 2008-06-05 | 2008-10-15 | 长春黄金研究院 | Gold extraction process with low pollution and high recovery for refractory gold concentrate |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102560084A (en) * | 2012-01-14 | 2012-07-11 | 长春黄金设计院 | Arsenic removal process containing post-combustion technology |
| CN105219950A (en) * | 2014-06-17 | 2016-01-06 | 武汉理工大学 | A kind of sulfate slag puies forward golden roasting pretreatment method |
| CN107034353A (en) * | 2017-04-27 | 2017-08-11 | 中南大学 | A kind of method of low-temperature bake acidleach dissociation gold |
| CN107199116A (en) * | 2017-06-09 | 2017-09-26 | 烟台金奥冶炼有限公司 | A kind of carbon containing Gold Concentrate under Normal Pressure two-stage roasting slag selects carbon method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012031379A1 (en) | 2012-03-15 |
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Open date: 20110112 |