CN104212974A - Method for synchronously recovering gold, iron and cobalt or nickel from iron-containing cyanide tailings of gold ore - Google Patents
Method for synchronously recovering gold, iron and cobalt or nickel from iron-containing cyanide tailings of gold ore Download PDFInfo
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- CN104212974A CN104212974A CN201410455720.7A CN201410455720A CN104212974A CN 104212974 A CN104212974 A CN 104212974A CN 201410455720 A CN201410455720 A CN 201410455720A CN 104212974 A CN104212974 A CN 104212974A
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a method for synchronously recovering gold, iron and cobalt or nickel from iron-containing cyanide tailings of gold ore. The method comprises the following steps: (1) after being evenly mixed with a reducing agent and a fluxing agent, the iron-containing cyanide tailings of gold ore are put into a crucible, are put into a constant-temperature muffle furnace for constant-temperature heating to perform the direct reduction reaction, and are taken out and subjected to water quenching to obtain a valuable metal-enriched iron ore concentrate after two-stage ore grinding and magnetic separation; (2) after the valuable metal-enriched iron ore concentrate obtained in the step (1) is dried and sampled, dilute sulfuric acid solution is added for leaching to obtain leaching slag and cobalt or nickel-containing ferrous sulfate solution; and (3) the leaching slag obtained in the step (2) is added in sodium cyanide solution for leaching to obtain a gold-containing pregnant solution. The leaching rate of gold reaches above 75%; the leaching rate of iron reaches above 83%; and the leaching rate of such other valuable metals as cobalt and nickel reaches above 60%.
Description
Technical field
The invention belongs to comprehensive utilization of resources and technical field of mineral processing, relate in particular to a kind of direct-reduction iron content gold mine cyaniding mine tailing and synchronously reclaim the method for Jin Hetie and cobalt or nickel.
Background technology
Gold mine cyaniding mine tailing is the waste that Gold Ore discharges after levigate, ore dressing Cyanide Leaching extract gold from, and mainly contains SiO
2, CaO and a certain amount of Fe
2o
3, Al
2o
3, MgO and a small amount of precious metal.Along with the high speed development of China's gold extractive technique, quantity, scale and the output day by day of gold mine, but ore Beneficiation Feed Grade but constantly reduces, mining intensity increases day by day, consequent mine tailing amount is surged, according to incompletely statistics, be often only more than state-run and local gold mine cyaniding tailings discharging amount just reaches 2,000 ten thousand t.The mine tailing discharging in gold production process, not only takies a large amount of soils, wastes valuable Mineral resources and have a strong impact on ecotope, also exists huge potential safety hazard.Gold mine cyaniding mine tailing has that fine size, quantity are large, low price, utilizability high, not only contain the gold of some amount, what have also contains other valuable metal that can comprehensively reclaim and mineral, as copper, silver, lead, zinc, iron, antimony, tungsten, bismuth, sulphur, carbonate, silicate etc.At present, the recycling of gold mine cyaniding mine tailing is mainly contained to following methods: the one, as material of construction, the 2nd, as secondary resource reclaiming, the 3rd, utilize Tailings Dam to reclaim and build up fields, the 4th, make underground filling material with mine tailing.Wherein mainly, by means such as flotation, high intensity magnetic separation, magnetizing roasting, Chemical Leachings, the gold and silver in gold mine cyaniding mine tailing and other association useful elements are carried out to secondary recovery as copper, lead, zinc, iron, molybdenum, bismuth, sulphur etc. as secondary resource.To gold mine cyaniding mine tailing rational exploitation and utilization, huge economic benefit and environmental benefit will be produced.
Chinese patent CN101363081A-nontoxic gold extracting method from contain golden mine tailing, relate to a kind of beneficiation method from high bismuth and the symbiosis of many metals or association type gold mine, particularly nontoxic gold extracting method from contain golden mine tailing, the method has been carried out nontoxic extraction to the gold in golden mine tailing, does not but relate to the wherein polymetallic recycling of symbiosis or association.And the technique of Chinese patent application CN103433124A-a kind of gold concentrator tailings comprehensive recovery of iron, molybdenum, sericite, relate to a kind of gold concentrator tailings by the technique of primary grinding, a stages of magnetic separation, two-stage flotation comprehensive recovery of iron, molybdenum, sericite, selected milltailings mineral embedding cloth is simple, can make object mineral effective monomer dissociate by primary grinding, not relate to the processing mode of the gold mine cyaniding mine tailing of multi-metal complex embedding cloth form.
Summary of the invention
The object of the invention is to, provide a kind of iron content gold mine cyaniding mine tailing synchronously to reclaim the method for Jin Hetie and cobalt or nickel, the method can effectively synchronously reclaim gold, iron and other valuable metals (cobalt or nickel etc.) in iron content gold mine cyaniding mine tailing, has remarkable economy and environment meaning.
For achieving the above object, the present invention has adopted following technical scheme:
The present invention is by adding reductive agent and solubility promoter, direct-reduction iron content gold mine cyaniding mine tailing is enriched in the valuable metals such as gold, cobalt, nickel in iron ore concentrate, in dilution heat of sulfuric acid, leach metallic iron, obtain containing the copperas solution of the valuable metals such as cobalt, nickel and soaking slag, last Cyanide Leaching soaks slag and extracts gold.
Its concrete steps are as follows:
1) iron content gold mine cyaniding mine tailing packs crucible into after mixing with reductive agent, fusing assistant, and put into the retort furnace of constant temperature, thermostatically heating is carried out direct reduction reactor, takes out shrend after reaction, and through two stage grinding, magnetic separation obtains the iron ore concentrate of concentration of valuable metals;
2) by step 1) iron ore concentrate of the concentration of valuable metals that obtains adds dilution heat of sulfuric acid to leach through drying, after sample preparation, obtains soaking slag and the copperas solution containing cobalt or nickel;
3) by step 2) gained soaks and in slag, adds sodium cyanide solution to leach, and obtains golden liquid.
Preferably, described step 1) in reductive agent consumption be the 20-30% of iron content gold mine cyaniding mine tailing quality, fusing assistant consumption is the 10-20% of iron content gold mine cyaniding mine tailing quality.
Preferably, described reductive agent is one or more in biomass char, coal, gac.Those skilled in the art can also select other to have the material of reductibility as required.
Preferably, described step 1) in thermostatically heating temperature be 1050-1300 DEG C, the thermostatically heating time is 40-80min.
Preferably, described step 1) in two stage grinding magnetic separation, two stage grinding concentration is 60-65%, first paragraph grinding fineness accounts for 70% for≤0.074mm, second segment grinding fineness accounts for 90% for≤0.074mm, two stages of magnetic separation intensity all adopts 80-120kA/m.
Preferably, described step 2) in dilute sulphuric acid concentration used be 2.5-4.0mol/L, leaching liquid-solid ratio is 10-20, extraction temperature is 60-80 DEG C, extraction time is 3-5h.
Preferably, described step 3) in sodium cyanide concentration be 2.5-4.0g/L, Cyanide Leaching liquid-solid ratio is 2.5-4.0, extraction time is 24-48h.
Iron in the handled iron content gold mine cyaniding of the present invention mine tailing mainly exists with the form of rhombohedral iron ore, and the valuable metals such as gold, cobalt, nickel be microfine compose exist in rhombohedral iron ore, general ore grinding leaching method can not be realized wherein effective leaching of valuable metal.
Compared with prior art, tool of the present invention has the following advantages:
1, adopt the iron mineral in the valuable metal gold mine cyaniding mine tailings such as direct-reduction iron content, cobalt, nickel, the method of the iron ore concentrate of the valuable metals such as the Concentration of Gold obtaining after ore grinding low intensity magnetic separation, cobalt, nickel being carried out to sulfuric acid leaching metallic iron, Cyanide Leaching gold reclaims other valuable metals in gold mine cyaniding mine tailing, has determined the effectively synchronous processing method that reclaims multiple valuable metal in gold mine cyaniding mine tailing of direct-reduction-sulfuric acid leaching metallic iron-Cyanide Leaching gold.
2, the copperas solution of sulfuric acid leaching iron ore concentrate gained can be used to produce ferrous sulfate crystal, and can synchronously reclaim the valuable metal such as cobalt, nickel.
3, in the present invention, the leaching yield of gold reaches more than 75%, and the leaching yield of iron reaches more than 83%, and other valuable metals reach more than 60% as the leaching yield such as cobalt, nickel.
4, the present invention can effectively synchronously reclaim gold and iron and other valuable metals in iron content gold mine cyaniding mine tailing, has remarkable economy and environment meaning.
Brief description of the drawings
Fig. 1 is the process flow sheet that iron content gold mine cyaniding mine tailing of the present invention synchronously reclaims the method for Jin Hetie and cobalt or nickel.
Embodiment
Be described further of the present invention below in conjunction with accompanying drawing and example, but it does not limit the scope of the present invention.
As shown in Figure 1, a kind of iron content gold mine cyaniding mine tailing synchronously reclaims the method for Jin Hetie and cobalt or nickel, and described method comprises the steps:
1) iron content gold mine cyaniding mine tailing packs crucible into after mixing with reductive agent, fusing assistant, and put into the retort furnace of constant temperature, thermostatically heating is carried out direct reduction reactor, takes out shrend after reaction, and through two stage grinding, magnetic separation obtains the iron ore concentrate of concentration of valuable metals;
2) by step 1) iron ore concentrate of the concentration of valuable metals that obtains adds dilution heat of sulfuric acid to leach through drying, after sample preparation, obtains soaking slag and the copperas solution containing cobalt or nickel;
3) by step 2) gained soaks in slag and adds in sodium cyanide solution and leach, and obtains golden liquid.
Embodiment 1
Henan gold mine cyaniding mine tailing is containing golden 3.28g/t, and iron content 33.16%, contains cobalt 0.61%, and the coal of interpolation 30% makees reductive agent, and adds 10% fusing assistant, after mixing, packs in crucible, treats that retort furnace is warming up to 1300 DEG C and puts into sample, thermostatically heating 40min.After completing roasting, take out sample shrend, carry out two stage grinding magnetic separation, two stage grinding concentration is 65%, and primary grinding fineness accounts for 70% for≤0.074mm, and secondary grinding fineness accounts for 90% to≤0.074mm, and two stages of magnetic separation magneticstrength is 120kA/m.By iron ore concentrate oven dry, sample preparation, in dilution heat of sulfuric acid, leach metallic iron, wherein dilute sulphuric acid concentration is 3.5mol/L, and liquid-solid ratio is 15, and extraction temperature is 60 DEG C, and extraction time is 5h, obtains containing cobalt copperas solution and soaks slag.Sulphur acid leaching residue is carried out to cyanide gold-leaching, and wherein sodium cyanide concentration is 2.5g/L, and liquid-solid ratio is 4.0, and extraction time is 24h.Finally obtain golden leaching yield and reach 75.53%, the leaching yield of iron reaches 85.42%, and the leaching yield of cobalt reaches 62.13%.
Embodiment 2
Fujian gold mine cyaniding mine tailing is containing golden 2.83g/t, and iron content 29.43%, containing cobalt 1.21%, the biomass char of interpolation 20% makees reductive agent, and adds 20% fusing assistant, after mixing, packs in crucible, treat that retort furnace is warming up to 1050 DEG C and puts into sample, thermostatically heating 80min.After completing roasting, take out sample shrend, carry out two stage grinding magnetic separation, two stage grinding concentration is 63%, and primary grinding fineness accounts for 70% for≤0.074mm, and secondary grinding fineness accounts for 90% to≤0.074mm, and two stages of magnetic separation magneticstrength is 80kA/m.By iron ore concentrate oven dry, sample preparation, in dilution heat of sulfuric acid, leach metallic iron, wherein dilute sulphuric acid concentration is 4.0mol/L, and liquid-solid ratio is 10, and extraction temperature is 80 DEG C, and extraction time is 3h, obtains containing cobalt copperas solution and soaks slag.Sulphur acid leaching residue is carried out to cyanide gold-leaching, and wherein sodium cyanide concentration is 3.5g/L, and liquid-solid ratio is 2.5, and extraction time is 36h.Finally obtain golden leaching yield and reach 77.46%, the leaching yield of iron reaches 87.21%, and the leaching yield of cobalt reaches 60.01%.
Embodiment 3
Shandong gold mine cyaniding mine tailing is containing golden 2.12g/t, and iron content 25.78% is nickeliferous 1.83%, adds 25% coal and makees reductive agent, and add 20% fusing assistant, after mixing, packs in crucible, treats that retort furnace is warming up to 1200 DEG C and puts into sample, thermostatically heating 60min.After completing roasting, take out sample shrend, carry out two stage grinding magnetic separation, two stage grinding concentration is 65%, and primary grinding fineness accounts for 70% for≤0.074mm, and secondary grinding fineness accounts for 90% to≤0.074mm, and two stages of magnetic separation magneticstrength is 90kA/m.By iron ore concentrate oven dry, sample preparation, in dilution heat of sulfuric acid, leach metallic iron, wherein dilute sulphuric acid concentration is 2.5mol/L, and liquid-solid ratio is 20, and extraction temperature is 80 DEG C, and extraction time is 4.5h, obtains nickeliferous copperas solution and soaks slag.Sulphur acid leaching residue is carried out to cyanide gold-leaching, and wherein sodium cyanide concentration is 3.5g/L, and liquid-solid ratio is 3.0, and extraction time is 48h.Finally obtain golden leaching yield and reach 79.32%, the leaching yield of iron reaches 83.27%, and the leaching yield of nickel reaches 63.18%.
Embodiment 4
Guizhou gold mine cyaniding mine tailing is containing golden 3.57g/t, and iron content 28.87%, containing cobalt 0.84%, the gac of interpolation 25% makees reductive agent, and adds 15% fusing assistant, after mixing, packs in crucible, treat that retort furnace is warming up to 1300 DEG C and puts into sample, thermostatically heating 70min.After completing roasting, take out sample shrend, carry out two stage grinding magnetic separation, two stage grinding concentration is 60%, and primary grinding fineness accounts for 70% for≤0.074mm, and secondary grinding fineness accounts for 90% to≤0.074mm, and two stages of magnetic separation magneticstrength is 110kA/m.By iron ore concentrate oven dry, sample preparation, in dilution heat of sulfuric acid, leach metallic iron, wherein dilute sulphuric acid concentration is 3.0mol/L, and liquid-solid ratio is 15, and extraction temperature is 80 DEG C, and extraction time is 5h, obtains containing cobalt copperas solution and soaks slag.Sulphur acid leaching residue is carried out to cyanide gold-leaching, and wherein sodium cyanide concentration is 4.0g/L, and liquid-solid ratio is 4.0, and extraction time is 48h.Finally obtain golden leaching yield and reach 76.47%, the leaching yield of iron reaches 87.98%, and the leaching yield of cobalt reaches 65.72%.
It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described.Although the present invention is had been described in detail with reference to embodiment, will be understood by those skilled in the art that, technical scheme of the present invention is modified or is equal to replacement, do not depart from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (8)
1. iron content gold mine cyaniding mine tailing synchronously reclaims a method for Jin Hetie and cobalt or nickel, said method comprising the steps of:
1) iron content gold mine cyaniding mine tailing packs crucible into after mixing with reductive agent, fusing assistant, and put into the retort furnace of constant temperature, thermostatically heating is carried out direct reduction reactor, takes out shrend after reaction, and through two stage grinding, magnetic separation obtains the iron ore concentrate of concentration of valuable metals;
2) by step 1) iron ore concentrate of the concentration of valuable metals that obtains adds dilution heat of sulfuric acid to leach through drying, after sample preparation, obtains soaking slag and the copperas solution containing cobalt or nickel;
3) by step 2) gained soaks slag and adds in sodium cyanide solution and leach, and obtains golden liquid.
2. method according to claim 1, is characterized in that, the iron in described iron content gold mine cyaniding mine tailing mainly exists with the form of rhombohedral iron ore, and the valuable metals such as gold, cobalt, nickel be microfine compose exist in rhombohedral iron ore.
3. method according to claim 1, is characterized in that, described step 1) in reductive agent consumption be the 20-30% of iron content gold mine cyaniding mine tailing quality, fusing assistant consumption is the 10-20% of iron content gold mine cyaniding mine tailing quality.
4. method according to claim 1, is characterized in that, described reductive agent is one or more in biomass char, coal, gac.
5. method according to claim 1, is characterized in that, described step 1) in thermostatically heating temperature be 1050-1300 DEG C, the thermostatically heating time is 40-80min.
6. method according to claim 1, it is characterized in that, described step 1) in two stage grinding magnetic separation, two stage grinding concentration is 60-65%, first paragraph grinding fineness accounts for 70% for≤0.074mm, second segment grinding fineness accounts for 90% for≤0.074mm, and two stages of magnetic separation intensity all adopts 80-120kA/m.
7. method according to claim 1, is characterized in that, described step 2) in dilute sulphuric acid concentration used be 2.5-4.0mol/L, leaching liquid-solid ratio is 10-20, extraction temperature is 60-80 DEG C, extraction time is 3-5h.
8. method according to claim 1, is characterized in that, described step 3) in sodium cyanide concentration be 2.5-4.0g/L, Cyanide Leaching liquid-solid ratio is 2.5-4.0, extraction time is 24-48h.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105349797A (en) * | 2014-08-20 | 2016-02-24 | 中国科学院过程工程研究所 | Method for carrying out pre-treatment desilication gold leaching of gold-containing tailings or cyanidation tailings |
| CN105603207A (en) * | 2016-03-18 | 2016-05-25 | 广州有色金属研究院 | Reinforced leaching method of gold in magnetite |
| CN113877525A (en) * | 2021-09-10 | 2022-01-04 | 中国地质大学（武汉） | Method for restoring heavy metal polluted water body by magnetic coke |
| CN114235734A (en) * | 2021-10-25 | 2022-03-25 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for determining high-sulfur content in pyrite |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4710361A (en) * | 1983-01-14 | 1987-12-01 | Ostrea Antonio M | Gold recovery by sulhydric-fatty acid flotation as applied to gold ores/cyanidation tailings |
| CN101942566A (en) * | 2010-09-09 | 2011-01-12 | 河南中原黄金冶炼厂有限责任公司 | Method for reclaiming gold and silver in tailings after roasting-cyaniding of gold concentrate |
| CN102690942A (en) * | 2012-06-18 | 2012-09-26 | 中南大学 | Method for reduction roasting and fortified acid dissolving of sulfur-containing gold concentrate calcine |
| CN103014319A (en) * | 2012-12-05 | 2013-04-03 | 中南大学 | Method for strengthening gold extraction of iron gold concentrate roasted product containing sulphur and arsenic |
| CN103305701A (en) * | 2013-07-02 | 2013-09-18 | 北京神雾环境能源科技集团股份有限公司 | Comprehensive recovery method of sulfuric-acid residue containing gold and silver |
-
2014
- 2014-09-09 CN CN201410455720.7A patent/CN104212974A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4710361A (en) * | 1983-01-14 | 1987-12-01 | Ostrea Antonio M | Gold recovery by sulhydric-fatty acid flotation as applied to gold ores/cyanidation tailings |
| CN101942566A (en) * | 2010-09-09 | 2011-01-12 | 河南中原黄金冶炼厂有限责任公司 | Method for reclaiming gold and silver in tailings after roasting-cyaniding of gold concentrate |
| CN102690942A (en) * | 2012-06-18 | 2012-09-26 | 中南大学 | Method for reduction roasting and fortified acid dissolving of sulfur-containing gold concentrate calcine |
| CN103014319A (en) * | 2012-12-05 | 2013-04-03 | 中南大学 | Method for strengthening gold extraction of iron gold concentrate roasted product containing sulphur and arsenic |
| CN103305701A (en) * | 2013-07-02 | 2013-09-18 | 北京神雾环境能源科技集团股份有限公司 | Comprehensive recovery method of sulfuric-acid residue containing gold and silver |
Non-Patent Citations (2)
| Title |
|---|
| 刘娜等: "某氰化尾渣直接还原焙烧一磁选选铁试验", 《金属矿山》 * |
| 马红周等: "焙烧氰化尾渣中氧化铁的磁化焙烧研究", 《稀有金属》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105349797A (en) * | 2014-08-20 | 2016-02-24 | 中国科学院过程工程研究所 | Method for carrying out pre-treatment desilication gold leaching of gold-containing tailings or cyanidation tailings |
| CN105349797B (en) * | 2014-08-20 | 2018-05-22 | 中国科学院过程工程研究所 | A kind of method containing golden tailing or cyanidation tailings pretreatment desiliconization leaching gold |
| CN105603207A (en) * | 2016-03-18 | 2016-05-25 | 广州有色金属研究院 | Reinforced leaching method of gold in magnetite |
| CN105603207B (en) * | 2016-03-18 | 2017-02-08 | 广州有色金属研究院 | Reinforced leaching method of gold in magnetite |
| CN113877525A (en) * | 2021-09-10 | 2022-01-04 | 中国地质大学（武汉） | Method for restoring heavy metal polluted water body by magnetic coke |
| CN114235734A (en) * | 2021-10-25 | 2022-03-25 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for determining high-sulfur content in pyrite |
| CN114235734B (en) * | 2021-10-25 | 2023-03-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for determining high-sulfur content in pyrite |
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