CN103243221A - Method for directly gathering gold by virtue of smelting of unmanageable gold ore molten pool containing arsenic and stibium - Google Patents
Method for directly gathering gold by virtue of smelting of unmanageable gold ore molten pool containing arsenic and stibium Download PDFInfo
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Abstract
The invention discloses a method for directly gathering gold by virtue of smelting of an unmanageable gold ore molten pool containing arsenic and stibium. The method comprises the following steps of: adding unmanageable gold ore containing arsenic and stibium with ferric oxide slag to a certain high-temperature melt after mixing and dosing the unmanageable gold ore; then leading oxygen-enriched air to oxidize and smelt, directly returning the produced gold iron sulfide concentrate to a smelting process; entering a low antimony metal matte phase into a selective blowing process to further gather gold; controlling the blowing final point to enable gold to enter into an expensive iron matte phase, finally extracting the gold from the expensive iron matte phase; producing Sb2O3 smoke after dust collection in the blowing process; merging tail gas containing SO2 with smoke in the smelting process to prepare sulfuric acid; and returning an iron oxide slag produced in the blowing process to the smelting process to dose. Efficient gathering and recovering of gold in the unmanageable gold ore are achieved by smelting and selective blowing processes of the molten bath; direct enrichment ratio of the gold can achieve 92-95%; and the total recovery rate of the gold can achieve over 99.0%.
Description
Technical fieldThe present invention relates to pyrometallurgical processes in the field of metallurgy, particularly contain the pyrometallurgy method of the direct enrichment gold of arsenic antimony difficult-treating gold mine bath smelting.
Background technologyDifficult-treating gold mine is called indissoluble gold ore deposit or obstinate gold mine usually again, even it refers to can not leach effectively with the cyanide process of routine through fine grinding the ore of most of gold.Therefore, usually said difficult-treating gold mine is for cyanide process, and the scholar who has thinks that the cyaniding leaching yield of gold is lower than 90% in the ore and is difficult-treating gold mine, is lower than 50% and then can be called utmost point difficult-treating gold mine.Difficult-treating gold mine mainly contains particulate parcel gold mine, copper gold, contains antimony gold mine, carbon containing gold mine and contain calaverite etc., these ores are why difficult mainly to be because exist sulfide parcel or other to influence the material of cyaniding process, therefore, must carry out pre-treatment with the factor of separating relevant metal or the gold of eliminating the effects of the act leaches to ore earlier, gold wherein can be extracted by cyanide process.
In all difficult-treating gold mines, the difficult-treating gold mine that contains arsenic and antimony then is again the most unmanageable in the difficult-treating gold mine, its reserves are also maximum, its development and use are global problems, this mainly is to be present in the sulphide ores because mustard gold or inferior micro-gold are parcel or contaminate shape, these sulfide are pyrite, mispickel and pyrrhotite normally, even most of gold can enter the lattice of pyrite and mispickel in some mineral deposits, exists with the state of submicroscopic gold.Even grind ore very thin, gold is dissociated, the cyaniding leaching effect extreme difference of gold.Usually need before golden cyaniding, to carry out pre-treatment for this treating refractory As-containing gold ore, the pyrite of parcel gold and mispickel are decomposed, allow gold expose out with cyanide solution and contact, thereby improve the cyaniding leaching yield of gold.
Obtained three kinds of the main oxidizing roasting method for the treatment of refractory As-containing gold ore pretreatment process, pressure oxidation method of industrial application and bacterial oxidation methods (the poplar natural feet. precious metals metallurgy and product deep processing. press of Central South University, 2005 .).The oxidizing roasting method is to handle main, the most widely used method of sulfide coated difficult-treating gold mine.Pyrite and mispickel are through oxidizing roasting, the oxidized formation of arsenic and sulphur As
2O
3And SO
2Volatilization, the calcining of generation porous.The characteristics of oxidizing roasting method are strong to adaptability to raw material, are widely used along with the raising of flue gas acid preparing level, the reduction of waste gas pollution control and treatment cost etc. simultaneously, and this method has obtained good application and popularization in China.The method that industry is at present adopted has methods such as two sections boiling roasters, circulation boiling roaster, shower roasting method and microwave calcining method, wherein two sections fluidized bed roasting methods adopt the most extensive, the rate of recovery of the gold of bibliographical information is between 88～92%, gold content is 4g/t in the cyanidation tailings, and in actually operating, slag contains the index of gold and differing greatly of report after the rate of recovery index of gold and the cyaniding.Present domestic employing two-stage roasting art breading contains the arsenic golden ore concentrate hard to treat, calcining fluctuates in a bigger scope through gold content in the cyanidation tailings after the cyaniding, containing gold can change to 20g/t from 8g/t, phase research golden in the cyanidation tailings is shown the Fe that roasting generates
2O
3Therefore parcel gold again, when handling high arsenic fine gold ore, be taken into account that inclusion is opened in the dearsenification desulfurization and forming Fe
2O
3The time not wrap up gold be very difficult.
The pressure oxidation method refers in High Temperature High Pressure acidity and exists under the situation of oxygen, the oxidized decomposition of pyrite and mispickel, and the sulphur in the concentrate is oxidized to vitriol, and arsenic is oxidized to arsenate through arsenite, and the gold that is wrapped up is exposed.The pressure oxidation method has that oxidation is thorough, gold leaching rate is high, environmental pollution is little, to advantages such as poisonous metal susceptibility are low, gold leaching rate is up to 95～97%, the content of gold is between 1.5～2.0g/t in the cyanidation tailings.But this method to equipment material require high, investment is big and silver raising recovery rate is low, processing cost is higher than roasting method, domestic still do not have an application example.The bacterial oxidation method refers to utilize airborne oxygen to come oxidation pyrite and mispickel under the condition that bacterium exists, employed bacterium is optimum to be thiobacillus ferrooxidant, thiobacillus ferrooxidant can oxygenolysis pyrite and mispickel, expose parcel gold wherein, the rate of recovery of this method can reach 92～95%, also have advantage of simple technology simultaneously, but have shortcomings such as oxidation cycle length, environmental protection cost height and adaptability to raw material difference.
All drawbacks in view of the existence of biooxidized concentrate conventional pretreatment method, new treatment process is developed, propose among the happy and auspicious Chinese patent ZL200910020494.9 of Cui Zhi, with high arsenic fine gold ore through after two-stage roasting removes arsenic and sulphur, secondary calcining and copper ore concentrates together add the copper matte regulus that matte smelting in the oxygen-enriched bottom-blowing stove and output contain gold, copper matte regulus is through blowing, output cathode copper behind pyrorefining and the electrorefining, from the anode sludge of copper electrolyzing refining, reclaim Jin Heyin (Cui Zhixiang at last, Shen Dianbang, Wang Zhi, Li Weiqun, Bian Ruimin. the theory and practice of oxygen-enriched bottom-blowing molten bath copper, China YouSe metallurgy, 2010,12 (6): 21 ~ 26. 3. the king believe grace, high Zhenglin, Qu Shengli, Zhang Junfeng, Ma Shaowei, Zou Lin. the extracting method of high arsenic complicated golden ore concentrate multielement, Chinese patent, ZL200910020494.9 authorizes day: on August 11st, 2011 .).To catch golden method be gold in can efficient recovery high arsenic fine gold ore calcining though this makes sulfonium, but its high arsenic fine gold ore that thermal value is high is through adding the copper smelting process as flux behind the two-stage roasting, cause the waste of the energy on the one hand, on the other hand owing to the content of ferric oxide in the calcining and silicon-dioxide is all higher, be difficult to realize that it is as the effect of copper smelting flux, this just requires to enlarge the scale of copper smelting to alleviate its disadvantageous effect, and then big to the demand of copper ore concentrates, these shortcomings have seriously restricted applying of this technology.
Summary of the inventionIn order to overcome the deficiency of traditional difficult-treating gold mine treatment process, the invention provides the direct enrichment gold of a kind of difficult-treating gold mine bath smelting, and gold recovery height, pyrometallurgy method that cost is low.
The technical solution used in the present invention is in order to achieve the above object:Join in the slag type composition certain high temperature melt after containing arsenic antimony difficult-treating gold mine and oxidation scum mix, feed oxygen-rich air oxidizing semlting then, make most of gold enter low antimony iron sulfonium phase, and arsenic and sulphur oxidation enter flue gas, through gathering dust output As
2O
3Flue dust, the SO after gathering dust
2Flue gas prepares sulfuric acid, and smelting slag carries out ore dressing behind overcooling and ore grinding handles, output contain the direct Returning smelting process of golden iron sulphide concentrate.Low antimony iron sulfonium enters the further enrichment gold of selectivity converting process mutually, and the control blow end point makes gold enter your iron sulfonium phase, your iron sulfonium finally to extract mutually golden from, and the converting process flue gas is output Sb after gathering dust
2O
3Flue dust contains SO
2Tail gas and fusion process flue gas combination system sulfuric acid, the oxidation scum Returning smelting process batching of converting process output.Core of the present invention be will contain constantly enrichment of gold in the arsenic antimony biooxidized concentrate, at first in the bath smelting process golden enrichment is entered low antimony iron sulfonium, be rich in your iron sulfonium of gold then in selectivity converting process output, finally your iron sulfonium to extract mutually golden from.
Concrete technological process and parameter are as follows:
1 bath smelting
The oxidation scum that will contain arsenic antimony difficult-treating gold mine and selectivity converting process output joins in 1100～1300 ℃ the high-temperature fusant, FeO/SiO in the control high-temperature fusant
2Ratio is stabilized in 1.5～2.2, adds small amount of limestone simultaneously and makes CaO/SiO in the high-temperature fusant
2Ratio is 0.1～0.4, continues to feed concentration and is 21～60% oxygen-rich air and carry out oxidizing semlting, enters flue gas after making arsenic and sulphur oxidized, again through gathering dust output As
2O
3Flue dust, the SO after gathering dust
2Flue gas prepares sulfuric acid, and the content of iron is 40～50% in the low antimony iron sulfonium of control, emits low antimony iron sulfonium and smelting slag successively, and low antimony iron sulfonium enters the selectivity converting process, and smelting slag is through overcooling and levigate back ore dressing, and output contains golden iron sulphide concentrate Returning smelting process.
The blowing of 2 selectivity
To hang down antimony iron sulfonium and carry out the selectivity further enrichment gold that blows, 1150～1300 ℃ of control blowing temperature, continue to blast concentration and be 21～60% oxygen-rich air, and adding appropriate amount of quartz sand, make low antimony iron sulfonium realize the expensive iron sulfonium of selective oxidation output, scum and flue gas, contain the direct Returning smelting process of the higher scum of iron protoxide, make antimony and the oxidation of part sulphur enter flue gas, through gathering dust output Sb
2O
3Flue dust, the SO after gathering dust
2Flue gas and fusion process merge relieving haperacidity, and iron level is 55～60% in your iron sulfonium by controlling, and make the enrichment of most of gold precipitation enter your iron sulfonium, and then extract gold from your iron sulfonium.
The present invention is applicable to handle and contains arsenic antimony difficult-treating gold mine that its main component scope is (%): Au20～200g/t, Ag 10～300g/t, As1.0～15.0, Sb0.5～10.0, S12～32, Fe15～35 and SiO by weight percentage
215～35, also be fit to handle the high-sulfur difficult-treating gold mine of other types.
The present invention and traditional difficult-treating gold mine method are relatively, following advantage is arranged: 1, by bath smelting and selectivity converting process, realize efficiently concentrating and the recovery of gold in the difficult-treating gold mine, the direct accumulation rate of gold can reach 92～95%, and the total yield of gold can reach more than 99.0%; 2, realize the selective separation of arsenic and antimony in bath smelting and selectivity converting process, reached the purpose of material heat output full use; 3, this technology directly is raw material with the difficult-treating gold mine, utilizes low antimony iron sulfonium to capture gold, does not need to allocate a large amount of non-ferrous metal concentrate into, and Technological adaptability is wide; 4, adopt beneficiation method to reclaim the gold that is mingled with in the smelting slag, reduced the difficulty of fusion process to golden recovery index control; 5, stop the environmental problem of traditional treatment method, eliminated the potential hazard of prussiate, realized the comprehensive recovery of valuable element; 6, labour intensity of the present invention is low, the treatment time is short, cost is low.
Description of drawings
Fig. 1: process flow diagram of the present invention.
Embodiment:
Embodiment 1:
The main component that contains arsenic antimony difficult-treating gold mine is (%): Au55g/t, Ag80g/t, As8.0, Sb5.5, S23.4, Fe29.8 and SiO by weight percentage
225.6.It is in 1280 ℃ the high-temperature fusant that the above-mentioned scum that contains arsenic antimony difficult-treating gold mine, converting process and an amount of Wingdale are joined temperature, FeO/SiO in the control high-temperature fusant
2=1.55, CaO/SiO
2=0.3, continue to feed concentration and be 50% oxygen-rich air oxidizing semlting, low antimony iron sulfonium, smelting slag and flue gas of output respectively, iron level is 46% in the low antimony iron sulfonium of control, and gold content is 134g/t in the low antimony iron sulfonium, and flue gas mainly contains As through the output of gathering dust
2O
3Flue dust, the back acid exhaust that gathers dust, smelting slag contains golden 3.0g/t, output contains golden iron sulphide concentrate Returning smelting process after overcooling and the ore dressing of levigate back.Low antimony iron sulfonium send the another one stove to carry out the selectivity blowing, 1280 ℃ of control blowing temperature, continue to blast concentration and be 40% oxygen-rich air, and adding appropriate amount of quartz sand, make low antimony iron sulfonium realize the expensive iron sulfonium of selective oxidation output, scum and flue gas, contain the direct Returning smelting process of the higher scum of iron protoxide, make antimony and the oxidation of part sulphur enter flue gas, through gathering dust output Sb
2O
3Flue dust, the SO after gathering dust
2Flue gas and fusion process merge relieving haperacidity, and iron level is 58% in your iron sulfonium by controlling, and make the enrichment of most of gold precipitation enter your iron sulfonium, and the content of gold is 468g/t in your iron sulfonium, further extract Jin Heyin again from your iron sulfonium.
Claims (2)
1. method that contains the direct enrichment gold of arsenic antimony difficult-treating gold mine bath smelting is characterized in that may further comprise the steps:
The A bath smelting
The oxidation scum that will contain arsenic antimony difficult-treating gold mine and selectivity converting process output joins in 1100～1300 ℃ the high-temperature fusant, FeO/SiO in the control high-temperature fusant
2Ratio is stabilized in 1.5～2.2, adds Wingdale simultaneously and makes CaO/SiO in the high-temperature fusant
2Ratio is 0.1～0.4, continues to feed concentration and is 21～60% oxygen-rich air and carry out oxidizing semlting, enters flue gas after making arsenic and sulphur oxidized, again through gathering dust output As
2O
3Flue dust, the SO after gathering dust
2Flue gas prepares sulfuric acid, and the content of iron is 40～50% in the low antimony iron sulfonium of control, emits low antimony iron sulfonium and smelting slag successively, and low antimony iron sulfonium enters the selectivity converting process, and smelting slag is through overcooling and levigate back ore dressing, and output contains golden iron sulphide concentrate Returning smelting process;
The blowing of B selectivity
To hang down antimony iron sulfonium and carry out the selectivity further enrichment gold that blows, 1150～1300 ℃ of control blowing temperature, continue to blast concentration and be 21～60% oxygen-rich air, and adding quartz sand, make low antimony iron sulfonium realize the expensive iron sulfonium of selective oxidation output, scum and flue gas, contain the direct Returning smelting process of the higher scum of iron protoxide, make antimony and the oxidation of part sulphur enter flue gas, through gathering dust output Sb
2O
3Flue dust, the SO after gathering dust
2Flue gas and fusion process merge relieving haperacidity, and iron level is 55～60% in your iron sulfonium by controlling, and make the enrichment of most of gold precipitation enter your iron sulfonium, and then extract gold from your iron sulfonium.
2. the method that contains the direct enrichment gold of arsenic antimony difficult-treating gold mine bath smelting as claimed in claim 1, it is characterized in that: the described main component scope that contains arsenic antimony difficult-treating gold mine is by weight percentage: Au20～200g/t, Ag 10～300g/t, As1.0～15.0, Sb0.5～10.0, S12～32, Fe15～35 and SiO
215～35.
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|---|---|---|---|---|
| CN104313328A (en) * | 2014-10-11 | 2015-01-28 | 中南大学 | Method for smelting and recovering lead and gold from reduction and sulfur fixation molten pool based on refractory gold ores and lead-containing residue raw materials |
| CN108152271A (en) * | 2017-11-27 | 2018-06-12 | 西北矿冶研究院 | Chemical separation analysis test method for gold in antimony electrolyte |
| CN108456777A (en) * | 2018-03-27 | 2018-08-28 | 广州万仕智投资有限公司 | A method of your antimony rich and honour lead is produced by |
| CN108823425A (en) * | 2018-07-13 | 2018-11-16 | 中南大学 | A kind of difficult-treating gold mine fused-extracting enrichment Method for extracting gold |
| CN108823426A (en) * | 2018-07-13 | 2018-11-16 | 中南大学 | A kind of method of rich golden iron sulfonium melting back extraction Concentration of Gold |
| CN110256079A (en) * | 2019-06-26 | 2019-09-20 | 中国科学院地球化学研究所 | A kind of preparation method of high-purity compact mispickel electrode |
| CN110373539A (en) * | 2019-08-28 | 2019-10-25 | 中南大学 | A kind of method that Concentration of Gold is strengthened in direct melting of difficult-treating gold mine |
| CN110777264A (en) * | 2019-12-05 | 2020-02-11 | 蒋开喜 | Method suitable for independent smelting of various complex gold concentrates |
| CN115369265A (en) * | 2022-07-18 | 2022-11-22 | 湖南辰州矿业有限责任公司 | Method for reducing gold-containing index of antimony matte of antimony gold blast furnace |
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| CN104313328A (en) * | 2014-10-11 | 2015-01-28 | 中南大学 | Method for smelting and recovering lead and gold from reduction and sulfur fixation molten pool based on refractory gold ores and lead-containing residue raw materials |
| CN108152271A (en) * | 2017-11-27 | 2018-06-12 | 西北矿冶研究院 | Chemical separation analysis test method for gold in antimony electrolyte |
| CN108456777A (en) * | 2018-03-27 | 2018-08-28 | 广州万仕智投资有限公司 | A method of your antimony rich and honour lead is produced by |
| CN108456777B (en) * | 2018-03-27 | 2020-01-14 | 广西万仕智稀贵金属科技有限公司 | Method for preparing rich noble lead from noble antimony |
| CN108823425A (en) * | 2018-07-13 | 2018-11-16 | 中南大学 | A kind of difficult-treating gold mine fused-extracting enrichment Method for extracting gold |
| CN108823426A (en) * | 2018-07-13 | 2018-11-16 | 中南大学 | A kind of method of rich golden iron sulfonium melting back extraction Concentration of Gold |
| CN110256079A (en) * | 2019-06-26 | 2019-09-20 | 中国科学院地球化学研究所 | A kind of preparation method of high-purity compact mispickel electrode |
| CN110256079B (en) * | 2019-06-26 | 2021-01-26 | 中国科学院地球化学研究所 | Preparation method of high-purity compact arsenopyrite electrode |
| CN110373539A (en) * | 2019-08-28 | 2019-10-25 | 中南大学 | A kind of method that Concentration of Gold is strengthened in direct melting of difficult-treating gold mine |
| CN110777264A (en) * | 2019-12-05 | 2020-02-11 | 蒋开喜 | Method suitable for independent smelting of various complex gold concentrates |
| CN115369265A (en) * | 2022-07-18 | 2022-11-22 | 湖南辰州矿业有限责任公司 | Method for reducing gold-containing index of antimony matte of antimony gold blast furnace |
| CN115369265B (en) * | 2022-07-18 | 2023-07-14 | 湖南辰州矿业有限责任公司 | Method for reducing gold-containing index of antimony matte of antimony-gold blast furnace |
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