CN103526042B - 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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- CN103526042B CN103526042B CN201310513646.5A CN201310513646A CN103526042B CN 103526042 B CN103526042 B CN 103526042B CN 201310513646 A CN201310513646 A CN 201310513646A CN 103526042 B CN103526042 B CN 103526042B
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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 and put forward golden technical field of smelting, particularly relate to a kind of method extracting gold and silver from gold ore.
Background technology
At present, for the smelting technology of gold ore, in prior art, usually adopt fluidized bed roasting-calcining Cyanide Process, but this method gold and silver comprehensive recovery is on the low side, in tailings, gold content is still up to 2 ~ 6g/t, and need provides one 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 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 is 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 process, output calcining;
After described calcining mixes with chlorizating agent and slag former, in chlorination molten bath, be heated to molten state through electric heating or fuel combustion, the gold and silver in melt is after chlorination reaction, and volatilization enters flue gas in a chloride-form;
Described flue gas obtains higher-grade gold mud after washing, filtration, and described gold mud produces ingot through refining.
When desulfurization with roasting technique dearsenification process, maturing temperature is 500 ~ 1000 DEG C, and the flue gas that roasting is discharged through dedusting, receive after arsenic with contact process extracting sulfuric acid.
After described calcining mixes with chlorizating agent and slag former, in chlorination molten bath, be heated to molten state through electric heating or fuel combustion, specifically comprise:
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 entering electric heating or fuel combustion heating, wherein the addition of chlorizating agent is 1 ~ 10% of described calcining weight, and blast a certain amount of air or oxygen according to reaction needed is auxiliary, service temperature is 1000 ~ 1500 DEG C, 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 produces ingot through refining, specifically comprises:
Described flue gas makes gold and silver muriate enter completely in washings through multistage washing, demist, described washings through dense, filter after obtain higher-grade gold mud product, and in gold mud, gold content reaches more than 5kg/t, and described gold mud is produced through refining and obtained ingot.
Described chlorizating agent comprises calcium chloride or sodium-chlor;
Described slag former comprises lime, Wingdale, quartz sand or ferric oxide;
State before described calcining and described chlorizating agent, slag former mixture enter molten bath comprises powder, bulk or sphere-shape.
After described flue gas obtains higher-grade gold mud after washing, filtration, described method also comprises:
Filtered liquid part after filtration is returned washing system recycle, and by being rare calcium chloride solution of about 10% with rear acquisition concentration in the outer scheduling thing of part and lime or Wingdale, returning after evaporation concentration and using with 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 is 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 used required in describing embodiment 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, under the prerequisite not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 provides by the embodiment of the present invention method flow schematic diagram extracting gold and silver from gold ore.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on embodiments of the invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to protection scope of the present invention.
The embodiment of the present invention 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, be illustrated in figure 1 the embodiment of the present invention the method flow schematic diagram extracting 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 process, output calcining
In this step, when desulfurization with roasting technique dearsenification process, maturing temperature controls at 500 ~ 1000 DEG C, and the flue gas that roasting is discharged can contact process extracting sulfuric acid after dedusting, receipts arsenic.
Step 12: after calcining mixes with chlorizating agent and slag former, is heated to molten state through electric heating or fuel combustion 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 entering electric heating or fuel combustion heating, wherein the addition of chlorizating agent is 1 ~ 10% of described calcining weight, service temperature is 1000 ~ 1500 DEG C, and blast a certain amount of air or oxygen of melt according to reaction needed is auxiliary, the air or oxygen blasting melt can accelerate the rate of volatilization of gold, and gold and silver evaporation rate reaches 95%, more than 90%, other compositions form liquid phase tailings, and gold content wherein can lower than 1g/t.
Above-mentioned chlorizating agent comprises the muriate such as calcium chloride or sodium-chlor; Described slag former is the oxide compound or the mineral that help calcining material to form melt, comprise lime, Wingdale, quartz sand, ferric oxide or the unclassified stores etc. containing mentioned component, the addition of slag former changes with material properties difference, and object ensures the low melting point of mixture and the good fluidity of melt.
In addition, the slag of discharging from molten bath after above-mentioned melting chlorination can also can be used as building materials or other purposes after shrend.
Step 13: the gold and silver in melt is after chlorination reaction, and volatilization enters flue gas in a chloride-form
Step 14: flue gas obtains higher-grade gold mud after washing, filtration, and described gold mud produces ingot through refining.
In this step, the flue gas that chlorination molten bath is discharged is the muriatic carrier of gold and silver, described flue gas makes gold and silver muriate enter completely in washings through multistage washing, demist, described washings through dense, filter after obtain higher-grade gold mud product, and gold content reaches more than 5kg/t in gold mud, described gold mud is produced through refining and is obtained ingot.
In specific implementation process, after described flue gas obtains higher-grade gold mud after washing, filtration, further the filtered liquid part after filtration can also be returned washing system to recycle, and will be rare calcium chloride solution of about 10% with rear acquisition concentration in the outer scheduling thing of part and lime or Wingdale, return after evaporation concentration and use with described calcining mixed cycle, economize on resources with maximized.
In sum, the processing method recovery of gold and silver that provides of the embodiment of the present invention 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 preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within 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 (5)
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 process, output calcining;
After described calcining mixes with chlorizating agent and slag former, in chlorination molten bath, be heated to molten state through electric heating or fuel combustion, the gold and silver in melt is after chlorination reaction, and volatilization enters flue gas in a chloride-form;
Described flue gas obtains higher-grade gold mud after washing, filtration, and described gold mud produces ingot through refining;
Wherein, after described calcining mixes with chlorizating agent and slag former, in chlorination molten bath, be heated to molten state through electric heating or fuel combustion, specifically comprise:
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 entering electric heating or fuel combustion heating, wherein the addition of chlorizating agent is 1 ~ 10% of described calcining weight, and blast a certain amount of air or oxygen of melt according to reaction needed is auxiliary, service temperature is 1000 ~ 1500 DEG C, and gold and silver evaporation rate reaches 95%, more than 90%.
2. from gold ore, extract the method for gold and silver according to claim 1, it is characterized in that, when desulfurization with roasting technique dearsenification process, maturing temperature is 500 ~ 1000 DEG C, and the flue gas that roasting is discharged through dedusting, receive after arsenic with contact process extracting sulfuric acid.
3. from gold ore, extract the method for gold and silver according to claim 1, it is characterized in that, described flue gas obtains higher-grade gold mud after washing, filtration, and described gold mud produces ingot through refining, specifically comprises:
Described flue gas makes gold and silver muriate enter completely in washings through multistage washing, demist, described washings through dense, filter after obtain higher-grade gold mud product, and in gold mud, gold content reaches more than 5kg/t, and described gold mud is produced through refining and obtained ingot.
4. from gold ore, extract the method for gold and silver according to claim 1, 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;
State before described calcining and described chlorizating agent, slag former mixture enter molten bath comprises powder, bulk or sphere-shape.
5. from gold ore, extract the method for gold and silver according to claim 1, it is characterized in that, after described flue gas obtains higher-grade gold mud after washing, filtration, described method also comprises:
Filtered liquid part after filtration is returned washing system recycle, and by being rare calcium chloride solution of 10% with rear acquisition concentration in the outer scheduling thing of part and lime or Wingdale, returning after evaporation concentration and using with calcining mixed cycle.
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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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| CN104388690B (en) * | 2014-11-01 | 2016-08-24 | 中南大学 | A kind of method for the treatment of refractory As-containing gold ore bath smelting concentration of valuable metals |
| 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 |
| CN105112677B (en) * | 2015-09-16 | 2017-10-17 | 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 |
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| CN107354309A (en) * | 2017-07-13 | 2017-11-17 | 北京矿冶研究总院 | Comprehensive recovery method of gold concentrate |
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| CN110863218B (en) * | 2019-11-27 | 2021-11-30 | 东北大学 | Method for extracting gold by adopting molten salt electrolysis enrichment |
| WO2022040334A1 (en) | 2020-08-18 | 2022-02-24 | 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 |
| WO2024081797A1 (en) * | 2022-10-12 | 2024-04-18 | William Marsh Rice University | Electrothermal chlorination and carbochlorination systems and methods for selective metal recovery |
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