CN101864520B - Method for recovering iron from gold concentrate - Google Patents
Method for recovering iron from gold concentrate Download PDFInfo
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- CN101864520B CN101864520B CN2010102269688A CN201010226968A CN101864520B CN 101864520 B CN101864520 B CN 101864520B CN 2010102269688 A CN2010102269688 A CN 2010102269688A CN 201010226968 A CN201010226968 A CN 201010226968A CN 101864520 B CN101864520 B CN 101864520B
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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
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Abstract
The invention provides a method for recovering iron from a gold concentrate, comprising the following steps: dividing the gold concentrate into a high sulfur part (the sulfur content is more than 47%) and a low sulfur part (the sulfur content is lower than 7%) by a floatation method, wherein the yield of each part is 50%; through separation and flotation, separating the high sulfur part with 47% of sulfur content to obtain the gold concentrate with high contents of gold, copper, lead and zinc and yield of 5% and obtain the gold concentrate in which the part with more than 48.5% of sulfur content accounts for 45%; and performing gold extraction on the part by cyaniding, calcinating cyanided dreg to obtain above 60% iron powder. By using the technology, more than 80% of iron from the cyanided dreg can be recovered; pyrite in the gold concentrate can be firstly purified to enable the purity of the pyrite to be above 90%, and then the pyrite is calcinated to prepare aid and wast heat is used for generating power; and the calcinated dreg has iron content above 60% so as to be served as a raw material for ironmaking in a steel mill, thus realizing comprehensive reclamation.
Description
(1), technical field
The present invention relates to the recovery method of iron in a kind of gold ore.
(2), background technology
At present; The cyaniding slag that refined gold ore cyaniding is carried behind the gold mainly is sold to the chemical plant as sulphur concentrate (sulphur: about 25%), baked for producing sulfuric acid, and the fired slags staple is mineral such as silicate, magnetite, rhombohedral iron ore; The total iron-holder of this part fired slags accounts for about 33%, can not be as iron-smelting raw material.Have few part unit will reduce the back magnetite and reclaim iron through magnetic separation, but such recovery only accounts for whole cyaniding slag about 5%, major part is made fusing assistant and is used for manufacture of cement, does Additive and be used for construction work.Because it is complicated to burn slag ingredient, be merely about 1/3rd in the utilization ratio of China, a large amount of burning slag or air storage pollute soil and water body, directly or indirectly jeopardize the eubiosis and HUMAN HEALTH.
(3), summary of the invention
Technical problem to be solved by this invention is, the recovery method of iron in a kind of gold ore is provided, and through optimizing the method for floating and the cyaniding slag sinter process of gold ore, the grade of the iron that reclaims in the gold ore is brought up to can be as the level of iron-smelting raw material.
In order to solve the problems of the technologies described above, the present invention has adopted following technical scheme.
The recovery method of iron in a kind of gold ore is characterized in that carrying out according to following steps:
The first step, ore grinding: gold ore is milled to 37 microns accounts for more than 95%;
Second step; Bulk flotation: flotation reagent and consumption thereof are: collecting agent butyl xanthate 50g/t, collecting agent butylamine black powder 50g/t, pore forming material MIBC36g/t; Floatation process is: one roughing; Twice selected, scans for twice, realizes that finally above high sulphur gold concentrate of S:47% and the following low-sulfur gold ore of S:7% respectively account for 50%;
In the 3rd step, separating flotation: the high sulphur gold concentrate that second step was obtained through the separating flotation method carries out separating flotation, and flotation reagent and consumption thereof are: collecting agent isoamyl xanthate 20g/t, quicklime 3000g/t bubbles
Agent 2# oil 10g/t, floatation process is: one roughing, triple cleaning is scanned for three times, obtains the high plumbous high zinc gold ore of high golden high-copper, and productive rate accounts for 5%, and obtains the above high sulphur gold concentrate of S:48.5%, and productive rate accounts for 45%;
The 4th step, cyanidation gold-extracted: as the high sulphur gold concentrate more than the 3rd S:48.5% that obtain of step to be carried out cyaniding according to common process extract gold;
In the 5th step, produce the smart powder of iron: the cyaniding slag that the 4th step obtained obtains the smart powder of iron, 750 ℃～900 ℃ of maturing temperatures, roasting time 60～90 minutes after through roasting.
Positively effect of the present invention is: through specific bulk flotation method gold ore is divided into two parts of high-sulfur (more than the S:47%) and low-sulfur (below the S:7%), productive rate respectively accounts for 50%.Separating flotation through uniqueness separates high sulphur gold concentrate again, obtains the above high sulphur gold concentrate of S:48.5%, accounts for 45%.After the above high sulphur gold concentrate of this part S:48.5% extracted gold through cyaniding, the cyaniding slag obtained the smart powder of the iron of iron grade more than 60% after roasting.
The present invention purifies the pyrite in the gold ore earlier, and pyrite purity is reached more than 90%, roasting relieving haperacidity then, and cogeneration, fired slags can reach iron content more than 60%, can realize comprehensive reutilization as the raw material of steel mill's ironmaking.
(4), embodiment
Further specify the present invention below in conjunction with embodiment.
The first step, ore grinding: adopt the KW-1250 vertical mill that gold ore is milled to 37 microns and account for more than 95%.
Second step, bulk flotation: two parts that gold ore are divided into high sulphur gold concentrate (more than the S:47%) and low-sulfur gold ore (below the S:7%) through the bulk flotation method.Flotation reagent and consumption thereof are: collecting agent butyl xanthate 50g/t, collecting agent butylamine black powder 50g/t, pore forming material methyl isobutyl carbinol (MIBC) 36g/t; Floatation process is: one roughing, twice selected, scans, realize that finally high sulphur gold concentrate and low-sulfur gold ore respectively account for 50% for twice.
In the 3rd step, separating flotation: the high sulphur gold concentrate that second step was obtained through the separating flotation method carries out separating flotation; Flotation reagent and consumption thereof: collecting agent isoamyl xanthate 20g/t, quicklime 3000g/t, pore forming material 2# flotation oil (monohydroxy-alcohol content 50%) 10g/t; Floatation process is: one roughing, and triple cleaning is scanned for three times, obtains the high plumbous high zinc gold ore of high golden high-copper, and productive rate accounts for 5%, and obtains high-sulfur (more than the S:48.5%) gold ore, and productive rate accounts for 45%.Extract copper, lead, zinc more respectively behind the high plumbous high zinc refined gold ore cyaniding of high golden high-copper.
The 4th step, cyanidation gold-extracted: the high sulphur gold concentrate that the 3rd step was obtained carries out cyaniding extraction gold according to common process.
In the 5th step, produce the smart powder of iron: the cyaniding slag that the 4th step obtained obtains the iron essence powder of purity 60% or more after through roasting.
Extract the chemical equation of iron: 4FeS
2+ 11O
2=2Fe
2O
3+ 8SO
2
The smart powder staple of the iron that obtains at last is rhombohedral iron ore and the magnetite that is reduced on a small quantity.
Wherein, 750 ℃～900 ℃ of maturing temperatures, roasting time 60～90 minutes.
Gold ore bulk flotation-copper sulphur content separating test result and overall target are seen table 1
Table 1
Sulphur concentrate oxidizing roasting test-results is seen table 2.
Table 2
Test conditions: chamber type electric resistance furnace (retort furnace); Temperature: 750 ℃; Time: 1.5 hours.
Claims (1)
1. the recovery method of iron in the gold ore is characterized in that carrying out according to following steps:
The first step, ore grinding: gold ore is milled to 37 microns accounts for more than 95%;
Second step; Bulk flotation: flotation reagent and consumption thereof are: collecting agent butyl xanthate 50g/t, collecting agent butylamine black powder 50g/t, pore forming material MIBC36g/t; Floatation process is: one roughing; Twice selected, scans for twice, realizes that finally above high sulphur gold concentrate of S:47% and the following low-sulfur gold ore of S:7% respectively account for 50%;
In the 3rd step, separating flotation: the high sulphur gold concentrate that second step was obtained through the separating flotation method carries out separating flotation, and flotation reagent and consumption thereof are: collecting agent isoamyl xanthate 20g/t; Quicklime 3000g/t, pore forming material 2# oil 10g/t, floatation process is: one roughing; Triple cleaning is scanned for three times, obtains the high plumbous high zinc gold ore of high golden high-copper; Productive rate accounts for 5%, and obtains the above high sulphur gold concentrate of S:48.5%, and productive rate accounts for 45%;
The 4th step, cyanidation gold-extracted: as the high sulphur gold concentrate more than the 3rd S:48.5% that obtain of step to be carried out cyaniding according to common process extract gold;
In the 5th step, produce the smart powder of iron: the cyaniding slag that the 4th step obtained obtains the smart powder of iron, 750 ℃～900 ℃ of maturing temperatures, roasting time 60～90 minutes after through roasting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010102269688A CN101864520B (en) | 2010-07-15 | 2010-07-15 | Method for recovering iron from gold concentrate |
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| CN2010102269688A CN101864520B (en) | 2010-07-15 | 2010-07-15 | Method for recovering iron from gold concentrate |
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| CN101864520A CN101864520A (en) | 2010-10-20 |
| CN101864520B true CN101864520B (en) | 2012-05-09 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102327817A (en) * | 2011-09-07 | 2012-01-25 | 山东黄金矿业(莱州)有限公司三山岛金矿 | Method for recovering low-grade valuable metals from gold mine cyanidation slag |
| CN102787233A (en) * | 2012-07-18 | 2012-11-21 | 山东国大黄金股份有限公司 | Method for circulative and comprehensive utilization of waste acids generated in acid preparation process through smoke smelting |
| CN103752422B (en) * | 2014-01-10 | 2017-01-04 | 新疆星塔矿业有限公司 | Flotation method for sulfur iron in refractory concentrate |
| CN108246494A (en) * | 2018-01-11 | 2018-07-06 | 江苏盐城环保科技城重金属防治研究中心 | A kind of method for detaching iron in high ferro cyanidation tailings |
| CN108515073B (en) * | 2018-05-02 | 2021-03-02 | 东北大学 | Harmless treatment method for cyanidation tailings |
| CN112295725A (en) * | 2020-10-17 | 2021-02-02 | 云南天朗再生资源有限责任公司 | Solid waste treatment method |
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| CN1228461C (en) * | 2004-10-25 | 2005-11-23 | 昆明易明兴矿冶设备有限公司 | Method for producing cinder of sulfur iron ore in high iron and low sulfur type |
| CN101078051A (en) * | 2007-06-20 | 2007-11-28 | 山东国大黄金股份有限公司 | Integrated utilization technique for cyanidation gold-extracted waste slag |
| CN101348859B (en) * | 2008-08-19 | 2010-08-25 | 昆明理工大学 | Method for comprehensively recovering gold, iron and sulphur resource from gold-containing sulfurous iron ore |
| CN101403042A (en) * | 2008-11-11 | 2009-04-08 | 罗仙平 | Recovery processing method for cyanogen golden mine tailing |
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Effective date of registration: 20171222 Address after: 261441, No. 888, dragon village, Jin Town, Yantai City, Shandong, Laizhou Patentee after: Shandong gold smelting Co., Ltd. Address before: 261441 Jincheng Jiaojia, Laizhou City, Shandong Province Patentee before: Shandong Gold Mine (Laizhou) Co., Ltd. Refinery |
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