CN114308375A - Gold tailing resource utilization and harmless disposal method - Google Patents
Gold tailing resource utilization and harmless disposal method Download PDFInfo
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- CN114308375A CN114308375A CN202210047040.6A CN202210047040A CN114308375A CN 114308375 A CN114308375 A CN 114308375A CN 202210047040 A CN202210047040 A CN 202210047040A CN 114308375 A CN114308375 A CN 114308375A
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Abstract
The invention discloses a resource utilization and harmless disposal method of gold tailings. The underflow after the tailing slurry of the dressing plant is deslimed enters a settling machine for grading, the graded underflow of the settling machine is screened out to obtain coarse sand products, and the screened tailing slurry is subjected to magnetic separation to obtain nonmagnetic products and magnetic products; wherein, the nonmagnetic product is graded by a swirler, the graded overflow enters a thickener for concentration, and the underflow of the swirler and the underflow of the thickener are mixed and then dehydrated to obtain feldspar concentrate; wherein the magnetic product is classified by a cyclone and then is conveyed to a high-frequency vibrating screen for dehydration to obtain magnetic separation minerals; and mixing tailing slurry screened by the high-frequency vibrating screen with desliming overflow and grading overflow, concentrating, performing filter pressing to obtain fine mud tailing filter cakes, and feeding backwater into a sedimentation tank for recycling. The invention provides a gold tailing disposal mode for a gold mine, solves the problem of unbalanced mining and filling of the gold mine, and has remarkable economic benefit and environmental benefit.
Description
Technical Field
The invention relates to the field of comprehensive utilization of tailings, in particular to a resource utilization and harmless disposal method of gold tailings.
Technical Field
Tailings are the inevitable products of mining and dressing. At present, most of small and medium-sized mines still adopt a traditional wet discharge method to discharge tailings to a tailing pond for stockpiling, and the tailing disposal mode not only has the potential safety hazard of dam break, but also has certain influence on the surrounding environment. In recent years, with the increasing national requirements on green and environmental protection of mines, the use of tailings for filling underground goafs gradually becomes the mainstream of harmless treatment of tailings. However, for gold mines, due to the fact that the grade of the existing ore is extremely low, the yield of tailings is as high as 99%, and due to the fact that the bulk weights of the raw ore and the tailings are different (about 1.5 times), the tailings cannot be completely used for filling of underground goafs, and mining and filling balance of the mine is difficult to achieve.
Although some tailings disposal methods such as solidification stockpiling, land reclamation, etc. have been successively reported in recent years, these methods are difficult to obtain economic benefits and are not very valuable for popularization in mines. Therefore, a tailing disposal method with simple process, stable operation, lower operation cost and better treatment effect is urgently needed to solve the problem of disposal of redundant tailings in the existing gold mine.
Disclosure of Invention
The invention aims to solve the technical problem of providing a gold tailing resource utilization and harmless treatment method aiming at the problems of the existing gold mine, so as to realize multi-stage utilization and harmless treatment of the gold tailings and create greater economic value for mine enterprises.
The technical scheme of the invention is as follows:
a resource utilization and harmless disposal method of gold tailings is characterized by comprising the following steps: desliming tailing slurry of a dressing plant, feeding the deslimed underflow into a settling machine for grading, screening coarse sand products from the graded underflow of the settling machine, and magnetically separating the screened tailing slurry to obtain nonmagnetic products and magnetic products; wherein, the nonmagnetic product is graded by a swirler, the graded overflow enters a thickener for concentration, and the underflow of the swirler and the underflow of the thickener are mixed and then dehydrated to obtain feldspar concentrate; wherein the magnetic product is classified by another cyclone and then is conveyed to a high-frequency vibrating screen for dehydration to obtain magnetic separation minerals; and mixing tailing slurry screened by the high-frequency vibrating screen, desliming overflow, sedimentation machine overflow and grading overflow of the other cyclone, concentrating and filter-pressing to obtain a fine mud tailing filter cake, and returning water to the sedimentation tank for recycling.
Preferably, the desliming process is realized by using a desliming hopper, wherein the cone angle of the desliming hopper is 55 degrees, and the overflow granularity is 0.074 mm.
Preferably, the magnetic separation adopts a three-section high-gradient vertical ring magnetic separator magnetic separation process, and the magnetic separation strength is respectively as follows: the first-stage magnetic separation intensity is 0.5T, the second-stage magnetic separation intensity is 1.0T, and the third-stage magnetic separation intensity is 1.5T.
Preferably, the whole production area is divided into a comprehensive utilization workshop, a filter pressing workshop and a finished product workshop; the comprehensive utilization workshop is used for producing products including coarse sand, magnetic separation minerals and feldspar concentrates so as to realize resource utilization of tailings; the filter pressing workshop is used for filter pressing undersize tailings and overflow tailings into fine mud tailings filter cakes used as raw materials of building materials; the finished product workshop is used for storing finished products produced in the comprehensive utilization workshop.
Compared with the prior art, the invention has the following advantages:
the invention realizes zero emission of tailings. In the whole production flow, in order to ensure the hundred percent resource utilization and harmless disposal of tailings, tailing slurry screened by a high-frequency vibrating screen and desliming, settling and grading overflow tailings are concentrated and then are subjected to pressure filtration under the action of a two-section plate-and-frame filter press to form fine mud tailing filter cakes, the fine mud tailing filter cakes are transported and stockpiled outside an automobile, the fine mud tailing filter cakes can be used for producing building products such as cement bricks after certain treatment, and return water is returned to a sedimentation tank for recycling. The method has the advantages that the tailings generated by the gold mine can be utilized to the maximum extent while being environment-friendly, the environmental pollution is avoided, the method is clean and environment-friendly, and the national policies of clean production and circular economy are met.
Detailed Description
The invention is further described below with reference to specific embodiments.
The specific embodiment of the invention comprises the following steps:
s1: the tailing slurry of the concentrating mill is pumped to a desliming hopper by a slurry pump for desliming, and in the process, the fine slime attached to coarse ore particles in the slurry and a slime formed by the fine slime are dissociated and dispersed to achieve the purpose of removal; wherein the cone angle of the desliming hopper is 55 degrees, and the overflow granularity is 0.074 mm;
s2: the bottom flow of the desliming bucket automatically flows to a hindered settling machine under the action of gravity to carry out coarse and fine particle classification;
s3: after desliming and grading, removing coarse materials by a cylindrical deslagging screen to obtain coarse sand products; wherein the mesh of the cylinder deslagging screen is 40 meshes, and a coarse sand product with the grain diameter larger than 0.4mm can be obtained.
S4: after coarse removal by the cylindrical deslagging screen, tailing slurry under the screen still contains a large amount of useful elements, so that in order to realize multi-stage utilization of the tailing slurry, the tailing slurry under the cylindrical deslagging screen is subjected to strong magnetic separation, and a non-magnetic product and a magnetic product are obtained after the tailing slurry is subjected to a magnetic separation process by a three-section high-gradient vertical ring magnetic separator; the magnetic separation strength of the three-section high-gradient vertical ring magnetic separator can be respectively set as follows: the magnetic field intensity of the first-stage magnetic separation is 0.5T, the magnetic field intensity of the second-stage magnetic separation is 1.0T, and the magnetic field intensity of the third-stage magnetic separation is 1.5T.
The obtained nonmagnetic mineral is graded by a cyclone, the graded overflow is concentrated by a thickener, the underflow of the cyclone and the underflow of the thickener are mixed and then subjected to two-stage filter pressing and dehydration process by two belt filter presses to obtain the feldspar concentrate product with the whiteness of more than 60 percent, and the feldspar concentrate product is conveyed to a finished product workshop by a belt to be stocked and sold.
The obtained magnetic product automatically flows into the buffer tank; classifying the magnetic product in the buffer tank by adopting another cyclone; the classified bottom flow is conveyed to a high-frequency vibrating screen for dehydration until the water content is about 10 percent, the oversize product (325 meshes) is magnetic separation mineral, and the magnetic separation mineral can be returned to a dressing plant for re-dressing to obtain beneficial metal mineral, and can also be directly transported for sale; wherein the high-frequency vibrating screen has 325 meshes; and mixing tailing slurry screened by the high-frequency vibrating screen, desliming overflow, sedimentation machine overflow and grading overflow of the other cyclone, and then concentrating and filter-pressing to obtain fine mud tailings for filter-piling.
In order to facilitate the operation management of the production system, the whole production area is divided into a comprehensive utilization workshop, a filter pressing workshop and a finished product workshop according to actual conditions. The comprehensive utilization workshop is used for producing products such as coarse sand, magnetic separation minerals, feldspar concentrates and the like, and can realize resource utilization of tailings; the filter pressing workshop is used for filter pressing undersize tailings and overflow tailings into fine mud tailing filter cakes and transporting the filter cakes outwards for storage, and the filter pressing workshop can be used for producing products such as cement bricks and the like after certain processing treatment; the finished product workshop is used for storing finished products produced in the comprehensive utilization workshop and selling the finished products by automobile outsourcing.
In the whole production process, in order to carry out harmless treatment on undersize tailings and overflow tailings and realize zero emission of the tailings, tailing slurry screened by a high-frequency vibrating screen and overflow tailings of a desliming hopper, a hindered settling machine and a cyclone are conveyed to a buffer tank for storage, then after the tailing slurry and the overflow tailings are concentrated by a thickener with the diameter of 18m, underflow is subjected to fine mud and tailing dehydration by two platen frame type filter presses to form fine mud and tailing filter cakes, the filter cakes are transported and stockpiled by an automobile, and return water is returned to a sedimentation tank for recycling.
The gold tailings resource utilization and harmless disposal method provided by the invention can realize multistage utilization of the gold tailings, is used for producing products such as coarse sand, feldspar concentrate, magnetic separation minerals and the like, creates great economic benefit for mine enterprises, simultaneously prepares the remaining fine mud tailings into filter cakes for outward transportation and stacking, can be used for preparing building products such as cement bricks and the like after certain treatment, realizes zero emission of the mine tailings, and meets the national requirements for clean production of mines.
Claims (4)
1. A resource utilization and harmless disposal method of gold tailings is characterized by comprising the following steps: desliming tailing slurry of a dressing plant, feeding the deslimed underflow into a settling machine for grading, screening coarse sand products from the graded underflow of the settling machine, and magnetically separating the screened tailing slurry to obtain nonmagnetic products and magnetic products; wherein, the nonmagnetic product is graded by a swirler, the graded overflow enters a thickener for concentration, and the underflow of the swirler and the underflow of the thickener are mixed and then dehydrated to obtain feldspar concentrate; wherein the magnetic product is classified by another cyclone and then is conveyed to a high-frequency vibrating screen for dehydration to obtain magnetic separation minerals; and mixing tailing slurry screened by the high-frequency vibrating screen, desliming overflow, sedimentation machine overflow and grading overflow of the other cyclone, concentrating and filter-pressing to obtain a fine mud tailing filter cake, and returning water to the sedimentation tank for recycling.
2. The resource utilization and harmless disposal method of gold tailings as claimed in claim 1, which is characterized in that: the desliming process is realized by using a desliming bucket, the cone angle of the desliming bucket is 55 degrees, and the overflow granularity is 0.074 mm.
3. The resource utilization and harmless disposal method of gold tailings as claimed in claim 1, which is characterized in that: the magnetic separation adopts a three-section high-gradient vertical ring magnetic separator magnetic separation process, and the magnetic separation strength is respectively as follows: the first-stage magnetic separation intensity is 0.5T, the second-stage magnetic separation intensity is 1.0T, and the third-stage magnetic separation intensity is 1.5T.
4. The resource utilization and harmless disposal method of gold tailings as claimed in claim 1, 2 or 3, which is characterized in that: dividing the whole production area into a comprehensive utilization workshop, a filter pressing workshop and a finished product workshop; the comprehensive utilization workshop is used for producing products including coarse sand, magnetic separation minerals and feldspar concentrates so as to realize resource utilization of tailings; the filter pressing workshop is used for filter pressing undersize tailings and overflow tailings into fine mud tailings filter cakes used as raw materials of building materials; the finished product workshop is used for storing finished products produced in the comprehensive utilization workshop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210047040.6A CN114308375A (en) | 2022-01-17 | 2022-01-17 | Gold tailing resource utilization and harmless disposal method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210047040.6A CN114308375A (en) | 2022-01-17 | 2022-01-17 | Gold tailing resource utilization and harmless disposal method |
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| CN114308375A true CN114308375A (en) | 2022-04-12 |
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| CN202210047040.6A Withdrawn CN114308375A (en) | 2022-01-17 | 2022-01-17 | Gold tailing resource utilization and harmless disposal method |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000026801A (en) * | 1998-10-23 | 2000-05-15 | 이경운 | Method for separation and collection of organic minerals from dressing ore wastes of gold mine |
| KR20030089109A (en) * | 2002-05-16 | 2003-11-21 | 한국지질자원연구원 | Treating method for harmfullessness and recycling of mine tailings on scheelite ore |
| CN103816990A (en) * | 2014-02-19 | 2014-05-28 | 哈巴河金坝矿业有限公司 | Method and device for comprehensively recycling gold flotation tailings |
| CN105057088A (en) * | 2015-08-10 | 2015-11-18 | 山东华晟投资有限公司 | Method for recycling quartz and feldspar mixtures from gold flotation tailings |
| CN109894259A (en) * | 2019-04-04 | 2019-06-18 | 山东华特磁电科技股份有限公司 | Gold tailings method of comprehensive utilization containing gold, iron, feldspar |
| CN111871596A (en) * | 2020-07-22 | 2020-11-03 | 山东水天缘环境科技有限公司 | System for treating gold ore flotation tailing mud and processing technology for producing raw materials for buildings by using system |
| CN113856890A (en) * | 2021-08-31 | 2021-12-31 | 中国矿业大学 | Resource comprehensive utilization system and method for gold ore associated minerals |
-
2022
- 2022-01-17 CN CN202210047040.6A patent/CN114308375A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000026801A (en) * | 1998-10-23 | 2000-05-15 | 이경운 | Method for separation and collection of organic minerals from dressing ore wastes of gold mine |
| KR20030089109A (en) * | 2002-05-16 | 2003-11-21 | 한국지질자원연구원 | Treating method for harmfullessness and recycling of mine tailings on scheelite ore |
| CN103816990A (en) * | 2014-02-19 | 2014-05-28 | 哈巴河金坝矿业有限公司 | Method and device for comprehensively recycling gold flotation tailings |
| CN105057088A (en) * | 2015-08-10 | 2015-11-18 | 山东华晟投资有限公司 | Method for recycling quartz and feldspar mixtures from gold flotation tailings |
| CN109894259A (en) * | 2019-04-04 | 2019-06-18 | 山东华特磁电科技股份有限公司 | Gold tailings method of comprehensive utilization containing gold, iron, feldspar |
| CN111871596A (en) * | 2020-07-22 | 2020-11-03 | 山东水天缘环境科技有限公司 | System for treating gold ore flotation tailing mud and processing technology for producing raw materials for buildings by using system |
| CN113856890A (en) * | 2021-08-31 | 2021-12-31 | 中国矿业大学 | Resource comprehensive utilization system and method for gold ore associated minerals |
Non-Patent Citations (1)
| Title |
|---|
| 李永亭;张云龙;: "高效高频脱水筛在尾矿干排处理中的应用实践", 黄金, no. 05, pages 66 - 70 * |
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Application publication date: 20220412 |
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