CN106669963A - Pre-concentration method for ore separation of gold tailings - Google Patents
Pre-concentration method for ore separation of gold tailings Download PDFInfo
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- CN106669963A CN106669963A CN201510763667.1A CN201510763667A CN106669963A CN 106669963 A CN106669963 A CN 106669963A CN 201510763667 A CN201510763667 A CN 201510763667A CN 106669963 A CN106669963 A CN 106669963A
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
Abstract
The invention discloses a pre-concentration method for ore separation of gold tailings. The method comprises the followings steps: (1) stirring, namely uniformly stirring the tailings according to a certain liquid to solid ratio, wherein the liquid to solid ratio is 4:1 to 1:1, and the tailings can be directly grinded without stirring operation if the tailings need to be grinded; (2) ore grinding, wherein according to the properties of ores, the concentration of the grinded ores is 50% to 75%, the fineness of 30% to 90% of the grinded ores is -200 meshes, and no stirring operation is needed when the tailings need to be grinded; and (3) ore separation, namely feeding ore pulp which is subjected to stirring and ore grinding operation into a Nelson concentrating machine for centrifugal ore separation to obtain gravity concentrate and tailings, wherein the obtained gravity concentrate is pre-selected gold concentrate satisfying the selection grade or is qualified gold concentrate. The pre-concentration method for ore separation disclosed by the invention is simple and short in process and simple and convenient to operate; the Nelson concentrating machine is small in floor space, large in treatment capacity and high in product concentration ratio; and no ore separation medicaments are used in the overall process, so the method is green and environmentally-friendly.
Description
Technical field
The present invention relates to a kind of processing method of precious metal ore, more particularly to a kind of ore dressing Preconcentration of gold ore mine tailing, are particularly suitable for gravel mine spoil reclaming, belong to technical field of mineral processing.
Background technology
Gold mineral product resource have it is non-renewable, China be gold big producing country and consumption big country, with the increasingly increase of gold demand amount, a large amount of developments and utilizations of mineral resources so that gold mineral product resource is day by day poor.Due to the second development and utilization of resource of tailings have the advantages that the short construction period, small investment, instant effect, can be mass produced, cost is relatively low, can the various valuable elements of synthetical recovery and nonmetalloid, therefore mine tailing is increasingly taken seriously as secondary resource.《Chinese 2l centuries agenda》" disposal of mine tailing, management and resource demonstration project " is listed in the Priority planning of pioneer field; National Development and Reform Committee, the Department of Science and Technology and Chinese Ministry of Environmental Protection are classified as resources conservation, comprehensive utilization and environmental protection technology that country encourages development resource of tailings comprehensive utilization, and China has brought up to considerable position the exploitation of resource of tailings.
Gold mine tailing is the solid powder that ore is discarded Jing after gold and other useful constituents are reclaimed in ore dressing or extraction of gold process, and particle diameter is typically in 0.15 below mm.At present China's gold mine tailing grade is most all in 0.3 more than g/t, even as high as more than the 3.0g/t having.Chinese gold industry mine mainly adopts flotation-cyaniding production technology.In the 70-80 ages in 20th century, due to being restricted by factors such as industrial policy, technical merit, dressing and smelting process methods, mostly in more than 1g/t, the low small mine of technical merit can reach 2-3 g/t to mine tailing gold grade, and hardly possible high for grade selects the Gold Concentrate under Normal Pressure of smelting, mine tailing gold grade to be up to 3-5 g/t.Simultaneously because the secondary utilization of resource of tailings need not dig up mine, crush and grinding operation, therefore there is fine size, quantity is big, utilizability is high, low price, the low feature of processing cost, therefore, there is gold ore mine tailing very high recycling to be worth, and be valuable secondary resource.
With the continuous progress of technique of preparing and other correlation techniques, Devoting Major Efforts To Developing gold tailings, secondary resource is fully reclaimed and is utilized, to protecting and improving the ecological environment, improve Utilization Rate of Mineral Resources, promote gold mine sustainable development to be significant.
The content of the invention
The purpose of the present invention is that and overcomes the shortcomings of that prior art is present, and develops the ore dressing Preconcentration that a kind of gold tailings are recycled, and makes gold tailings resource turn waste into wealth.The inventive method is mainly made up of steps such as stirring, ore grinding, Knelson concentrator pre-selections, according to ore properties, when processing gold tailings according to the inventive method, gold content can be made to reach qualified ore dressing Beneficiation Feed Grade in the gold tailings of more than 0.3g/t or directly obtain qualified Gold Concentrate under Normal Pressure.
The technical solution that the present invention is given is：The ore dressing Preconcentration of this gold ore mine tailing, its feature is made up of following steps.
（1）Stirring：Mine tailing is stirred by certain liquid-solid ratio, its objective is to break up it by strong stirring lumps, cementing shape, the parcel bulky grain mine tailing such as shape, reach fully dispersed, be conducive to follow-up sorting operation.Liquid-solid ratio is determined according to ore properties, typically 4：1 to 1：Between 1.If mine tailing needs ore grinding, operation need not be stirred, mine tailing is directly carried out ore grinding.
（2）Ore grinding：According to ore properties, ore milling concentration is typically between 50%-75%.Mog commonly reaches -200 mesh and accounts for 30%～90%, and concrete fineness determines regarding ore properties.When mine tailing needs ore grinding then without stirring for operation.
（3）Ore dressing：Ore pulp after stirring or the ore preparation work such as ore grinding is fed into Knelson concentrator carries out centrifugal separation, obtains gravity concentrate and mine tailing, the pre-selection Gold Concentrate under Normal Pressure of gravity concentrate now possibly according to Beneficiation Feed Grade, it is also possible to qualified Gold Concentrate under Normal Pressure.Gravity concentrate is that next step continues to sort or be directly sold to solution of gold smelting plant, is determined depending on mine tailing ore properties and sorting index.
Compared with prior art, the invention has the beneficial effects as follows.
1st, whole ore dressing preenrichment technological process is brief, easy to operate.
2nd, Knelson concentrator floor space is little, and treating capacity is big, and product concentration ratio is high.
3rd, whole process does not use any beneficiation reagent, environmental protection.
Description of the drawings
Accompanying drawing is the process chart of the present invention.
Specific embodiment
In conjunction with case study on implementation, technical scheme is described in detail.
Embodiment 1
Test ore be Hebei gravel mine mine tailing, Gold grade 0.33g/t.The mine tailing and water are pressed into 1：2 ratio is mixed, and after strong stirring, feeds Knelson concentrator process, is obtained result of the test and is shown in Table 1.Result of the test shows that gold concentrate grade is up to 9.6g/t, and the rate of recovery is 35.56%, the ore dressing Beneficiation Feed Grade of far super general gold mine, with the value that further ore dressing is processed.
The result of the test of the example 1 of table 1（%）.
| Name of product | Yield | Au grades | The Au rate of recovery |
| Concentrate | 1.22 | 9.6 | 35.56 |
| Mine tailing | 98.78 | 0.215 | 64.44 |
| Raw ore | 100 | 0.33 | 100 |
Embodiment 2.
Test ore be Liaoning gravel mine mine tailing, Gold grade 0.42g/t.The mine tailing and water are pressed into 1：2 ratio is mixed, and after strong stirring, feeds Knelson concentrator process, is obtained result of the test and is shown in Table 2.Result of the test shows that gold concentrate grade is up to 10.7g/t, and the rate of recovery is 46.21%, the ore dressing Beneficiation Feed Grade of far super general gold mine, with the value that further ore dressing is processed.
The result of the test of the example 2 of table 2（%）.
| Name of product | Yield | Au grades | The Au rate of recovery |
| Concentrate | 1.81 | 10.7 | 46.21 |
| Mine tailing | 98.19 | 0.23 | 53.79 |
| Raw ore | 100 | 0.42 | 100 |
Embodiment 3.
Test ore is external certain gold mine tailings, Gold grade 1.2g/t.The mine tailing and water are pressed into 1：2 ratio is mixed, and after strong stirring, feeds Knelson concentrator process, is obtained result of the test and is shown in Table 3.Result of the test shows that gold concentrate grade reaches 45.21g/t, reaches qualified Gold Concentrate under Normal Pressure standard, and the rate of recovery is 65.39%, realizes the effectively utilizes of resource of tailings.
The result of the test of the example 3 of table 3（%）
| Name of product | Yield | Au grades | The Au rate of recovery |
| Concentrate | 1.74 | 45.21 | 65.39 |
| Mine tailing | 98.26 | 0.42 | 34.61 |
| Raw ore | 100 | 1.2 | 100 |
Claims (1)
1. a kind of ore dressing Preconcentration of gold ore mine tailing, it is characterised in that be made up of following steps：
（1）Stirring：Mine tailing is stirred by certain liquid-solid ratio, its objective is to break up it by strong stirring lumps, cementing shape, the parcel bulky grain mine tailing such as shape, reach fully dispersed, be conducive to follow-up sorting operation, liquid-solid ratio is determined according to ore properties, typically 4：1 to 1：Between 1, if mine tailing needs ore grinding, operation need not be stirred, mine tailing is directly carried out ore grinding；
（2）Ore grinding：According to ore properties, typically between 50%-75%, mog commonly reaches -200 mesh and accounts for 30%～90% ore milling concentration, and concrete fineness determines regarding ore properties, when mine tailing needs ore grinding then without stirring for operation；
（3）Ore dressing：Ore pulp after the ore preparation work such as stirring or ore grinding is fed into Knelson concentrator carries out centrifugal separation, obtain gravity concentrate and mine tailing, gravity concentrate now is the pre-selection Gold Concentrate under Normal Pressure or qualified Gold Concentrate under Normal Pressure for meeting Beneficiation Feed Grade, gravity concentrate is that next step continues to sort or be directly sold to solution of gold smelting plant, is determined depending on mine tailing ore properties and sorting index.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108300868A (en) * | 2018-01-12 | 2018-07-20 | 灵宝金源矿业股份有限公司 | A kind of method that gold ore leaches tailing high efficiente callback low content gold |
| CN108380381A (en) * | 2018-05-02 | 2018-08-10 | 陕西冶金设计研究院有限公司 | A kind of Quartz Vein Type slightly in the pure gravity concentration apparatus of grain gold mine and method |
| CN109847922A (en) * | 2019-01-28 | 2019-06-07 | 山西紫金矿业有限公司 | A kind of Quartz Vein Type fine grained gold mine reselecting method |
| CN110923445A (en) * | 2019-10-18 | 2020-03-27 | 广西森合高新科技股份有限公司 | Method for recovering tailings of non-cyanide gold beneficiation |
| CN112844816A (en) * | 2021-03-18 | 2021-05-28 | 河南金源黄金矿业有限责任公司 | Gravity separation regrinding process and equipment for treating Nielsen products |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108300868A (en) * | 2018-01-12 | 2018-07-20 | 灵宝金源矿业股份有限公司 | A kind of method that gold ore leaches tailing high efficiente callback low content gold |
| CN108380381A (en) * | 2018-05-02 | 2018-08-10 | 陕西冶金设计研究院有限公司 | A kind of Quartz Vein Type slightly in the pure gravity concentration apparatus of grain gold mine and method |
| CN109847922A (en) * | 2019-01-28 | 2019-06-07 | 山西紫金矿业有限公司 | A kind of Quartz Vein Type fine grained gold mine reselecting method |
| CN110923445A (en) * | 2019-10-18 | 2020-03-27 | 广西森合高新科技股份有限公司 | Method for recovering tailings of non-cyanide gold beneficiation |
| CN112844816A (en) * | 2021-03-18 | 2021-05-28 | 河南金源黄金矿业有限责任公司 | Gravity separation regrinding process and equipment for treating Nielsen products |
| CN112844816B (en) * | 2021-03-18 | 2024-01-19 | 河南金源黄金矿业有限责任公司 | Gravity dressing regrinding process and equipment for treating Nelson products |
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