CN103526042A - Method for extracting gold and silver from gold concentrate - Google Patents
Method for extracting gold and silver from gold concentrate Download PDFInfo
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- CN103526042A CN103526042A CN201310513646.5A CN201310513646A CN103526042A CN 103526042 A CN103526042 A CN 103526042A CN 201310513646 A CN201310513646 A CN 201310513646A CN 103526042 A CN103526042 A CN 103526042A
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Abstract
The embodiment of the invention discloses a method for extracting gold and silver from gold concentrate, which comprises the steps of firstly, taking the gold concentrate as a raw material, roasting the gold concentrate in a one-stage or multi-stage fluidized bed furnace for desulfurization and dearsenification treatment to produce roasted product; mixing the calcine with a chlorinating agent and a slagging agent, heating to a molten state in a chlorination molten pool by electric heating or fuel combustion, and volatilizing gold and silver in the melt into flue gas in a chloride form after chlorination reaction; and washing and filtering the flue gas to obtain high-grade gold mud, and refining the gold mud to produce gold ingots. The method has the advantages of high gold and silver recovery rate, strong raw material adaptability, short process flow, low energy consumption and more friendly operation environment.
Description
Technical field
The present invention relates to put forward golden technical field of smelting, relate in particular to a kind of method of extracting gold and silver from gold ore.
Background technology
At present, for the smelting technology of gold ore, in prior art, conventionally adopt fluidized bed roasting-calcining Cyanide Process, but this method gold and silver comprehensive recovery is on the low side, in tailings, gold content, still up to 2～6g/t, needs to provide a kind of more efficient gold concentrate smelting technique for this reason.
Summary of the invention
The object of this invention is to provide a kind of method of extracting gold and silver from gold ore, the method recovery of gold and silver is high, adaptability to raw material is strong, technical process is brief, energy consumption is low and operating environment friendly.
From gold ore, extract a method for gold and silver, described method comprises:
Take gold ore as raw material, by described gold ore after one or more snippets boiling roaster desulfurization dearsenification is processed, output calcining;
Described calcining is heated to molten state through electric heating or fuel combustion after mixing with chlorizating agent and slag former in chlorination molten bath, and the gold and silver in melt, after chlorination reaction, enters flue gas with chloride form volatilization;
Described flue gas obtains higher-grade gold mud after washing, filtration, and described gold mud is produced ingot through refining.
When desulfurization with roasting technique dearsenification is processed, maturing temperature is 500～1000 ℃, and the flue gas that roasting is discharged through dedusting, receive arsenic after with contact process extracting sulfuric acid.
Described calcining is heated to molten state through electric heating or fuel combustion after mixing with chlorizating agent and slag former in chlorination molten bath, specifically comprises:
After described calcining and chlorizating agent and slag former mix in proportion, high-temperature fusion chlorination reaction is carried out in the chlorination molten bath that enters electric heating or fuel combustion heating, wherein the addition of chlorizating agent is 1～10% of described calcining weight, and assist and blast a certain amount of air or oxygen according to reaction needed, service temperature is 1000～1500 ℃, and gold and silver evaporation rate reaches 95%, more than 90%.
Described flue gas obtains higher-grade gold mud after washing, filtration, and described gold mud is produced ingot through refining, specifically comprises:
Described flue gas enters in washings gold and silver muriate through multistage washing, demist completely, described washings through dense, obtain higher-grade gold mud product after filtering, and more than in gold mud, gold content reaches 5kg/t, described gold mud is produced and is obtained ingot through refining again.
Described chlorizating agent comprises calcium chloride or sodium-chlor;
Described slag former comprises lime, Wingdale, quartz sand or ferric oxide;
The state that described calcining and described chlorizating agent, slag former mixture enter before molten bath comprises powder, bulk or sphere-like.
After described flue gas obtains higher-grade gold mud after washing, filtration, described method also comprises:
Filtered liquid after filtering is partly returned to washing system and recycles, and will the outer scheduling thing of part with lime or Wingdale in rear acquisition concentration be rare calcium chloride solution of 10% left and right, after evaporation concentration, return and the use of described calcining mixed cycle.
As seen from the above technical solution provided by the invention, the method recovery of gold and silver is high, adaptability to raw material is strong, technical process is brief, energy consumption is low and operating environment friendly.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 extracts the method flow schematic diagram of gold and silver for embodiment of the present invention provide from gold ore.
Embodiment
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 clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on embodiments of the invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to protection scope of the present invention.
The embodiment of the present invention be take gold ore as raw material, adopts the method for fluosolids roasting desulfurization dearsenification-calcining melting chloridizing volatilization to extract gold and silver.Below in conjunction with accompanying drawing, the embodiment of the present invention is described in further detail, the method flow schematic diagram that embodiment of the present invention provide is extracted gold and silver from gold ore is provided, described method comprises:
Step 11: take gold ore as raw material, by described gold ore after one or more snippets boiling roaster desulfurization dearsenification is processed, output calcining
In this step, when desulfurization with roasting technique dearsenification is processed, maturing temperature is controlled at 500～1000 ℃, and the flue gas that roasting is discharged can contact process extracting sulfuric acid after dedusting, receipts arsenic.
Step 12: calcining is heated to molten state through electric heating or fuel combustion after mixing with chlorizating agent and slag former in chlorination molten bath
In this step, after described calcining and chlorizating agent and slag former mix in proportion, high-temperature fusion chlorination reaction is carried out in the chlorination molten bath that enters electric heating or fuel combustion heating, wherein the addition of chlorizating agent is 1～10% of described calcining weight, service temperature is 1000～1500 ℃, and according to the auxiliary a certain amount of air or oxygen of melt that blasts of reaction needed, the air or oxygen that blasts melt can be accelerated golden rate of volatilization, and gold and silver evaporation rate reaches 95%, more than 90%, other compositions form liquid phase tailings, and gold content wherein can be lower than 1g/t.
Above-mentioned chlorizating agent comprises the muriates such as calcium chloride or sodium-chlor; Described slag former is to help calcining material to form oxide compound or the mineral of melt, the unclassified stores that comprises lime, Wingdale, quartz sand, ferric oxide or contain mentioned component etc., the addition of slag former changes with material properties is different, and object is to guarantee the low melting point of mixture and the good fluidity of melt.
The slag of discharging from molten bath after above-mentioned melting chlorination in addition, can also can be used as building materials or other purposes after shrend.
Step 13: the gold and silver in melt, after chlorination reaction, enters flue gas with chloride form volatilization
Step 14: flue gas obtains higher-grade gold mud after washing, filtration, and described gold mud is produced ingot through refining.
In this step, the flue gas that discharge in chlorination molten bath is the muriatic carrier of gold and silver, described flue gas makes gold and silver muriate enter in washings completely through multistage washing, demist, described washings through dense, obtain higher-grade gold mud product after filtering, and more than in gold mud, gold content reaches 5kg/t, described gold mud is produced and is obtained ingot through refining again.
In specific implementation process, after described flue gas obtains higher-grade gold mud after washing, filtration, can also further the filtered liquid after filtering partly be returned to washing system recycles, and will in the outer scheduling thing of part and lime or Wingdale, be rare calcium chloride solution of 10% left and right with rear acquisition concentration, after evaporation concentration, return with described calcining mixed cycle and use, with maximized, economize on resources.
In sum, the embodiment of the present invention provides processing method recovery of gold and silver is higher, adaptability to raw material is strong, technical process is brief, energy consumption is low and operating environment is more friendly.
The above; be only the present invention's embodiment preferably, but protection scope of the present invention is not limited to this, is anyly familiar with in technical scope that those skilled in the art disclose in the present invention; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (6)
1. from gold ore, extract a method for gold and silver, it is characterized in that, described method comprises:
Take gold ore as raw material, by described gold ore after one or more snippets boiling roaster desulfurization dearsenification is processed, output calcining;
Described calcining is heated to molten state through electric heating or fuel combustion after mixing with chlorizating agent and slag former in chlorination molten bath, and the gold and silver in melt, after chlorination reaction, enters flue gas with chloride form volatilization;
Described flue gas obtains higher-grade gold mud after washing, filtration, and described gold mud is produced ingot through refining.
2. from gold ore, extract according to claim 1 the method for gold and silver, it is characterized in that, when desulfurization with roasting technique dearsenification is processed, maturing temperature is 500～1000 ℃, and the flue gas that roasting is discharged through dedusting, receive arsenic after with contact process extracting sulfuric acid.
3. from gold ore, extract according to claim 1 the method for gold and silver, it is characterized in that, described calcining is heated to molten state through electric heating or fuel combustion after mixing with chlorizating agent and slag former in chlorination molten bath, specifically comprises:
After described calcining and chlorizating agent and slag former mix in proportion, high-temperature fusion chlorination reaction is carried out in the chlorination molten bath that enters electric heating or fuel combustion heating, wherein the addition of chlorizating agent is 1～10% of described calcining weight, and according to the auxiliary a certain amount of air or oxygen of melt that blasts of reaction needed, service temperature is 1000～1500 ℃, and gold and silver evaporation rate reaches 95%, more than 90%.
4. from gold ore, extract according to claim 1 the method for gold and silver, it is characterized in that, described flue gas obtains higher-grade gold mud after washing, filtration, and described gold mud is produced ingot through refining, specifically comprises:
Described flue gas enters in washings gold and silver muriate through multistage washing, demist completely, described washings through dense, obtain higher-grade gold mud product after filtering, and more than in gold mud, gold content reaches 5kg/t, described gold mud is produced and is obtained ingot through refining again.
5. from gold ore, extract according to claim 1 the method for gold and silver, it is characterized in that,
Described chlorizating agent comprises calcium chloride or sodium-chlor;
Described slag former comprises lime, Wingdale, quartz sand or ferric oxide;
The state that described calcining and described chlorizating agent, slag former mixture enter before molten bath comprises powder, bulk or sphere-like.
6. from gold ore, extract according to claim 1 the method for gold and silver, it is characterized in that, after described flue gas obtains higher-grade gold mud after washing, filtration, described method also comprises:
Filtered liquid after filtering is partly returned to washing system and recycle, and by being rare calcium chloride solution of 10% left and right with rear acquisition concentration in the outer scheduling thing of part and lime or Wingdale, after evaporation concentration, return with calcining mixed cycle and use.
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| CN201310513646.5A CN103526042B (en) | 2013-10-25 | 2013-10-25 | Method for extracting gold and silver from gold concentrate |
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| CN201310513646.5A CN103526042B (en) | 2013-10-25 | 2013-10-25 | Method for extracting gold and silver from gold concentrate |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104388690A (en) * | 2014-11-01 | 2015-03-04 | 中南大学 | Method for carrying out bath smelting concentration on valuable metals in arsenic-containing refractory gold ore |
| CN105112677A (en) * | 2015-09-16 | 2015-12-02 | 中国地质科学院郑州矿产综合利用研究所 | Method for comprehensively recovering valuable metals in gold smelting slag |
| CN105200240A (en) * | 2015-10-12 | 2015-12-30 | 上海第二工业大学 | Method for selectively leaching and recovering gold in surface coating of printed circuit board |
| CN106702144A (en) * | 2015-07-20 | 2017-05-24 | 北京中科云腾科技有限公司 | Method for comprehensively recycling metal from mineral substances containing multi-metal |
| CN107354309A (en) * | 2017-07-13 | 2017-11-17 | 北京矿冶研究总院 | Comprehensive recovery method of gold concentrate |
| CN107815553A (en) * | 2017-10-20 | 2018-03-20 | 湖南行者环保科技有限公司 | A kind of method that short route environment-friendly type is completely separated gold from refractory gold |
| CN109423558A (en) * | 2017-08-25 | 2019-03-05 | 中冶长天国际工程有限责任公司 | A kind of technique of municipal administration and metallurgical difficult solid waste collaboration resource utilization |
| CN110863218A (en) * | 2019-11-27 | 2020-03-06 | 东北大学 | Method for extracting gold by adopting molten salt electrolysis enrichment |
| CN113789437A (en) * | 2021-07-30 | 2021-12-14 | 烟台市金奥环保科技有限公司 | Process method for recovering gold and silver by desulfurization and dearsenification of high-arsenic gold concentrate |
| US11319613B2 (en) | 2020-08-18 | 2022-05-03 | Enviro Metals, LLC | Metal refinement |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104388690A (en) * | 2014-11-01 | 2015-03-04 | 中南大学 | Method for carrying out bath smelting concentration on valuable metals in arsenic-containing refractory gold ore |
| CN106702144A (en) * | 2015-07-20 | 2017-05-24 | 北京中科云腾科技有限公司 | Method for comprehensively recycling metal from mineral substances containing multi-metal |
| CN105112677A (en) * | 2015-09-16 | 2015-12-02 | 中国地质科学院郑州矿产综合利用研究所 | Method for comprehensively recovering valuable metals in gold smelting slag |
| CN105200240A (en) * | 2015-10-12 | 2015-12-30 | 上海第二工业大学 | Method for selectively leaching and recovering gold in surface coating of printed circuit board |
| CN105200240B (en) * | 2015-10-12 | 2017-03-29 | 上海第二工业大学 | A kind of method that Selectively leaching reclaims gold in print circuit board surface coating |
| CN107354309A (en) * | 2017-07-13 | 2017-11-17 | 北京矿冶研究总院 | Comprehensive recovery method of gold concentrate |
| CN109423558A (en) * | 2017-08-25 | 2019-03-05 | 中冶长天国际工程有限责任公司 | A kind of technique of municipal administration and metallurgical difficult solid waste collaboration resource utilization |
| CN107815553A (en) * | 2017-10-20 | 2018-03-20 | 湖南行者环保科技有限公司 | A kind of method that short route environment-friendly type is completely separated gold from refractory gold |
| CN110863218A (en) * | 2019-11-27 | 2020-03-06 | 东北大学 | Method for extracting gold by adopting molten salt electrolysis enrichment |
| CN110863218B (en) * | 2019-11-27 | 2021-11-30 | 东北大学 | Method for extracting gold by adopting molten salt electrolysis enrichment |
| US11319613B2 (en) | 2020-08-18 | 2022-05-03 | Enviro Metals, LLC | Metal refinement |
| US11578386B2 (en) | 2020-08-18 | 2023-02-14 | Enviro Metals, LLC | Metal refinement |
| CN113789437A (en) * | 2021-07-30 | 2021-12-14 | 烟台市金奥环保科技有限公司 | Process method for recovering gold and silver by desulfurization and dearsenification of high-arsenic gold concentrate |
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