CN216440847U - Resource utilization system of gold mine tailings - Google Patents
Resource utilization system of gold mine tailings Download PDFInfo
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- CN216440847U CN216440847U CN202122092316.6U CN202122092316U CN216440847U CN 216440847 U CN216440847 U CN 216440847U CN 202122092316 U CN202122092316 U CN 202122092316U CN 216440847 U CN216440847 U CN 216440847U
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Abstract
The utility model relates to a resource utilization system of gold mine tailings, belongs to the technical field of gold mine tailing recovery, and solves the problems that in the prior art, valuable components are difficult to extract from the gold mine tailings through flotation, the requirements on the grade of the valuable components in the gold mine tailings are high, and the recovery rate of magnetic concentrate is low. The system comprises a first vibrating screen, a first high-gradient magnetic separator, a second vibrating screen, a third vibrating screen and a first filter which are connected in sequence; the device also comprises a concentration cyclone, a fourth vibrating screen and a second filter which are sequentially connected with the first high-gradient magnetic separator. The utility model realizes the resource utilization of gold mine tailings, has low production cost and good economic and social benefits.
Description
Technical Field
The utility model relates to the technical field of comprehensive utilization of mineral resources, in particular to a resource utilization system of gold mine tailings.
Background
Mineral resources are guarantee for national economic development, and gold ore is an important mineral resource and is characterized in that the associated mineral components are complex. Flotation is the primary technology for realizing metal separation and enrichment, a large amount of flotation tailings are generated in the process, and the traditional tailing treatment technology is tailing dam (reservoir) storage. The tailing dam (reservoir) occupies a large area and is high in maintenance cost, and the flotation gold mine tailings contain a large amount of harmful substances such as chemical reagents, heavy metals and the like, so that water and soil loss, water pollution, river channel silting and ecological environment damage are caused. Meanwhile, a large amount of valuable minerals are generated in gold mine tailings, so that serious resource waste is caused.
In the prior art, valuable components in gold tailings are difficult to extract through flotation, the requirement on the grade of the valuable components in the gold tailings is high, the existing magnetic separation method only has one section of magnetic field intensity, and the recovery rate of magnetic concentrate is low.
SUMMERY OF THE UTILITY MODEL
In view of the foregoing analysis, an embodiment of the present invention aims to provide a resource utilization system for gold mine tailings, so as to solve the problems that extraction of valuable components from gold mine tailings by flotation is difficult, requirements on the grade of valuable components in gold mine tailings are high, and the recovery rate of magnetic concentrate is low in the prior art.
The purpose of the utility model is mainly realized by the following technical scheme:
the utility model provides a resource utilization system of gold mine tailings, which comprises a first vibrating screen, a first high-gradient magnetic separator, a second vibrating screen, a third vibrating screen and a first filter, which are sequentially connected;
the device also comprises a concentration cyclone, a fourth vibrating screen and a second filter which are connected in sequence, wherein the concentration cyclone is connected with the first high-gradient magnetic separator.
Further, first shale shaker is first just gentle coupling elasticity sifter shale shaker, and the second shale shaker is the second just gentle coupling elasticity sifter shale shaker, and the third shale shaker is the third just gentle coupling elasticity sifter shale shaker, and the fourth shale shaker is the fourth just gentle coupling elasticity sifter shale shaker.
Further, the system also comprises a second high gradient magnetic separator and a third high gradient magnetic separator;
the first high gradient magnetic separator, the second high gradient magnetic separator and the third high gradient magnetic separator are sequentially connected, and the magnetic field intensity is sequentially increased, so that a three-section high gradient magnetic separation process is formed.
Further, the magnetic field intensity of the first high gradient magnetic separator, the second high gradient magnetic separator and the third high gradient magnetic separator is at least improved by 20 percent in sequence.
Further, the gold ore crushing and grading device also comprises a gold ore raw ore pretreatment unit, wherein the raw ore pretreatment unit is used for crushing and grading the gold ore raw ore.
Further, the gold mine tailing pretreatment unit comprises a crusher, a fifth rigid-flexible coupling elastic screen surface vibrating screen, a ball mill and a sixth rigid-flexible coupling elastic screen surface vibrating screen which are sequentially connected.
Further, the flotation device also comprises a flotation unit, and the flotation unit is used for floating the gold concentrate and the flotation tailings.
Further, the flotation unit comprises an ore pulp preprocessor and a flotation machine, wherein the ore grinding product generated by the gold ore raw ore preprocessing unit enters the ore pulp preprocessor, is added with a flotation reagent, is subjected to high-speed shearing and pulp mixing, and then enters the flotation machine for flotation to generate flotation concentrate and flotation tailings, and the flotation concentrate is dehydrated into gold concentrate; the flotation tailings enter a flotation tailing treatment unit.
Further, the mesh number of the first rigid-flexible coupling elastic screen surface vibrating screen is 40-50 meshes;
the mesh number of the second rigid-flexible coupling elastic screen surface vibrating screen is 70 meshes.
Further, the mesh number of the third rigid-flexible coupling elastic screen surface vibrating screen is 100 meshes; the mesh number of the fourth rigid-flexible coupling elastic screen surface vibrating screen is 120 meshes.
Compared with the prior art, the utility model can realize at least one of the following beneficial effects:
(1) after gold mine tailings are screened by a first vibrating screen, oversize products are used as building sand; the undersize products enter a first high-gradient magnetic separator for magnetic separation to obtain magnetic concentrate and magnetic tailings; dewatering and grading the magnetic concentrate through a second vibrating screen, taking oversize products as dry-mixed mortar materials, and dewatering undersize products through a third vibrating screen again to obtain undersize products of the third vibrating screen; and (4) filtering undersize of the third vibrating screen in a first filter, and taking oversize and filter cakes of the filter as dry-mixed mortar materials.
(2) The first high gradient magnetic separator is also connected with a concentration cyclone, a fourth vibrating screen and a second filter in sequence, and the processing process comprises the following steps: concentrating the magnetic separation tailings by a concentrating cyclone, and dehydrating and grading the underflow (namely the concentrated magnetic separation tailings) by a fourth vibrating screen; and (4) enabling overflow of the cyclone and undersize products of the fourth vibrating screen to enter a second filter, filtering to obtain filter cakes and filtrate, and mixing the filter cakes and oversize products of the fourth vibrating screen to obtain the building ceramic material.
(3) Compared with the prior art, the resource utilization system for gold mine tailings provided by the utility model enables the gold mine tailings to achieve nearly 100% resource utilization, avoids environmental pollution, resource waste and potential safety hazards caused by the adoption of tailing dam (reservoir) storage, has a simple process system and low production cost, and obviously improves the economic benefit and social benefit of mine enterprises.
(4) The utility model controls the water content of the recycled building sand to be 15-17%, the water content of the dry-mixed mortar material to be 18-20% and the water content of the building ceramic material to be 17-19%, and through controlling the water content of the gold mine tailings, the utility model is convenient for the transportation of the building sand, the dry-mixed mortar material and the building ceramic material on one hand and ensures the application requirements of the building industry on the other hand.
(5) The utility model takes the filtrate generated by the first filter and the second filter as the recycling water of the concentrating mill, thereby solving the problem of water consumption and realizing the comprehensive utilization of water resources.
In the utility model, the technical schemes can be combined with each other to realize more preferable combination schemes. Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model will be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the utility model, wherein like reference numerals are used to designate like parts throughout.
FIG. 1 is a process flow diagram of resource utilization of gold mine tailings.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the utility model and together with the description, serve to explain the principles of the utility model and not to limit the scope of the utility model.
The utility model provides a resource utilization system of gold mine tailings, which comprises a first vibrating screen, a first high-gradient magnetic separator, a second vibrating screen, a third vibrating screen and a first filter, which are sequentially connected; the device also comprises a concentration cyclone, a fourth vibrating screen and a second filter which are sequentially connected with the first high-gradient magnetic separator.
Specifically, as shown in fig. 1, the system for multistage screening and volume magnetic separation of gold mine tailings comprises a first vibrating screen, a first high gradient magnetic separator, a second vibrating screen, a third vibrating screen, a first filter, a concentration cyclone, a fourth vibrating screen and a second filter; wherein, first shale shaker, first high gradient magnet separator, second shale shaker, third shale shaker and first filter connect gradually, and its processing procedure is: after the gold mine tailings are screened by a first vibrating screen, oversize materials are used as building sand; the undersize products enter a first high-gradient magnetic separator for magnetic separation to obtain magnetic concentrate and magnetic tailings; dewatering and grading the magnetic concentrate through a second vibrating screen, taking oversize products as dry-mixed mortar materials, and dewatering undersize products through a third vibrating screen again to obtain undersize products of the third vibrating screen; and (3) filtering undersize of the third vibrating screen in a first filter, taking oversize and filter cakes of the first filter as dry-mixed mortar materials, and taking filtrate as circulating water of a concentrating mill. In addition, first high gradient magnet separator still connects gradually with concentrated swirler, fourth shale shaker and second filter, and its processing procedure is: concentrating the magnetic separation tailings by a concentrating cyclone, and dehydrating and grading the underflow (namely the concentrated magnetic separation tailings) by a fourth vibrating screen; and (3) enabling overflow of the cyclone and undersize products of the fourth vibrating screen to enter a second filter, filtering to obtain a filter cake and filtrate, mixing the filter cake and oversize products of the fourth vibrating screen to be used as a building ceramic material, and using the filtrate as circulating water of a concentrating mill to finish the recovery process of the gold tailings.
Compared with the prior art, the gold mine tailing multistage screening and gradient magnetic separation resource utilization system provided by the utility model has the advantages of low production cost and good economic and social benefits, and realizes 100% resource comprehensive utilization of gold mine tailings.
In order to improve the screening efficiency, the first vibrating screen, the second vibrating screen, the third vibrating screen and the fourth vibrating screen are all rigid-flexible coupling elastic screen surface vibrating screens. That is, first shale shaker is first just gentle coupling elasticity sifter shale shaker of rigidity, flexibility coupling elasticity sifter of second, the third shale shaker is the third just gentle coupling elasticity sifter shale shaker of rigidity, flexibility coupling elasticity sifter of rigidity, with the fourth shale shaker.
Specifically, the utility model adopts a rigid-flexible coupling elastic screen surface vibrating screen, and aims to: the rigid-flexible coupling elastic screen surface has the advantages of high strength of the rigid screen surface and large vibration of the flexible screen surface, high screening efficiency and long service life. Particularly for the grading-dehydration of gold tailings, the gold tailings slurry has high viscosity and density and very high requirements on the screen surface due to clear edges and corners and high hardness of gold tailings particles. Therefore, the first vibrating screen, the second vibrating screen, the third vibrating screen and the fourth vibrating screen are all rigid-flexible coupling elastic screen surface vibrating screens. The screen surface configured by the existing vibrating screen is a single rigid or single elastic screen surface, the vibration intensity of the single rigid screen surface is small, the material is easy to loosen and difficult, and the screen holes are easy to block, so that the screening efficiency is low; the single elastic screen surface overcomes the problem of a rigid screen surface due to large deformation of the single elastic screen surface, but is easy to damage and short in service life.
In order to improve the recovery rate of the gold mine tailings, the resource utilization system of the gold mine tailings further comprises a second high-gradient magnetic separator and a third high-gradient magnetic separator; the first high gradient magnetic separator, the second high gradient magnetic separator and the third high gradient magnetic separator are sequentially connected, and the magnetic field intensity is sequentially increased, so that a three-section high gradient magnetic separation process is formed.
Specifically, a first high gradient magnetic separator, a second high gradient magnetic separator and a third high gradient magnetic separator are connected in sequence, and the third high gradient magnetic separator is connected with a concentration cyclone in the next link; because the gold mine tailings have weak magnetism, the three-section high-gradient magnetic separator is adopted for magnetic separation for separating weak magnetic minerals, and compared with the common magnetic separation, the magnetic field intensity generated by the three-section high-gradient magnetic separation is increased in sequence and is high, so that the recovery rate of the gold mine tailings is much higher, namely, the yield of the magnetic concentrate is improved. It should be noted that the three-stage high gradient magnetic separation is due to the difference in the feeding materials of each stage of magnetic separation equipment, so that the parameters of each stage of magnetic separator are also different.
It should be noted that the dry resource utilization system further comprises a gold ore raw ore pretreatment unit, and the raw ore pretreatment unit is used for crushing and grading the gold ore raw ore.
Specifically, the gold mine tailing pretreatment unit comprises a crusher, a fifth rigid-flexible coupling elastic screen surface vibrating screen, a ball mill and a sixth rigid-flexible coupling elastic screen surface vibrating screen which are sequentially connected.
The dry resource utilization system also comprises a flotation unit, and the flotation unit is used for flotation of gold concentrate and flotation tailings.
Specifically, the flotation unit comprises an ore pulp preprocessor and a flotation machine, wherein an ore grinding product generated by the gold ore raw ore preprocessing unit enters the ore pulp preprocessor, is added with a flotation reagent, is subjected to high-speed shearing and size mixing, and then enters the flotation machine for flotation to generate flotation concentrate and flotation tailings, and the flotation concentrate is dehydrated into gold concentrate; the flotation tailings enter a flotation tailing treatment unit.
Wherein, the mesh number of the first rigid-flexible coupling elastic screen surface vibrating screen is 40 meshes to 50 meshes; the mesh number of the second rigid-flexible coupling elastic screen surface vibrating screen is 70 meshes; the mesh number of the third rigid-flexible coupling elastic screen surface vibrating screen is 100 meshes; the fourth rigid-flexible coupling elastic screen surface vibrating screen has 120 meshes.
The specific process of utilizing the gold mine tailing treatment unit comprises the following steps: the flotation tailings are subjected to 40-50-mesh classification through a first rigid-flexible coupling elastic screen surface vibrating screen, oversize products are used as building sand, moisture of the oversize products is 15-17%, and undersize products enter a first high-gradient magnetic separator, a second high-gradient magnetic separator and a third high-gradient magnetic separator to be subjected to three-section step magnetic separation, so that magnetic concentrate and magnetic tailings are obtained.
And (3) performing 70-mesh dehydration classification on the magnetic concentrate through a second rigid-flexible coupling elastic screen surface vibrating screen, taking oversize products as dry-mixed mortar materials, and performing 100-mesh dehydration on undersize products through a third rigid-flexible coupling elastic screen surface vibrating screen to obtain undersize products of the 100-mesh vibrating screen.
The undersize product of a vibrating screen of 100 meshes enters a first filter for filtering, the oversize product and the filter cake of the filter are used as dry-mixed mortar materials, the main components comprise amphibole, pyroxene, chlorite and the like, the moisture of the dry-mixed mortar materials is 18-20%, and the filtrate is used as the circulating water of a concentrating mill.
Concentrating the magnetic separation tailings by a concentrating cyclone, and performing 120-mesh dehydration classification on the underflow (namely the concentrated magnetic separation tailings) by a fourth rigid-flexible coupling elastic screen surface vibrating screen.
And (3) enabling undersize products of the cyclone overflow and a fourth rigid-flexible coupling elastic screen surface vibrating screen to enter a filter, filtering to obtain a filter cake and filtrate, mixing the filter cake and an oversize product of a 120-mesh screen to obtain an architectural ceramic material, wherein the main components comprise albite, potash feldspar, quartz and clay, the moisture of the architectural ceramic material is 17-19%, and the filtrate is used as circulating water of a concentrating mill.
Compared with the prior art, the resource utilization system for gold mine tailings with multi-stage screening and gradient magnetic separation provided by the utility model can realize 100% resource comprehensive utilization of the gold mine tailings.
The oversize product of the utility model refers to the material on the screen after the water is removed by the vibrating screen, and the filter cake of the filter refers to the filtered product.
The method comprises the steps of carrying out 40-50-mesh classification through a first rigid-flexible coupling elastic screen surface vibrating screen, carrying out 70-mesh dehydration classification on magnetic concentrate through a second rigid-flexible coupling elastic screen surface vibrating screen, and carrying out 100-mesh classification on undersize through a third rigid-flexible coupling elastic screen surface vibrating screen again to obtain undersize of a 100-mesh vibrating screen; concentrating the magnetic separation tailings by a concentrating cyclone, and performing 120-mesh dehydration classification on the tailings flowing through a fourth rigid-flexible coupling elastic screen surface vibrating screen at the bottom. Taking the 70-mesh dehydration classification as an example, when the 70-mesh dehydration classification is carried out, magnetic concentrate is fed into a screen surface, under the vibration action of a screen body and the screen surface, materials with the mesh size smaller than 70 and moisture penetrate through screen holes to become undersize materials, and materials with the mesh size larger than 70 become oversize materials. In the utility model, the reason that the screening mesh number is controlled in each step is that the components in the tailings with different particle size compositions are different, and resource utilization is carried out according to the components of the tailings.
The components of the dry-mixed mortar material comprise amphibole, pyroxene, chlorite, quartz and clay; the moisture of the dry-mixed mortar material is 18-20%.
The building ceramic material comprises albite, potash feldspar, quartz and clay; the moisture of the architectural ceramic material is 17-19%.
It should be noted that, in the multi-stage screening in the present invention, the classified particle size is determined according to the components in the gold mine tailings with different particle sizes, and the main compositions of different particle sizes are different.
Example 1
The embodiment provides a resource utilization system of gold mine tailings, which comprises the steps of firstly, carrying out 40-50-mesh classification on the gold mine flotation tailings through a first rigid-flexible coupling elastic screen surface vibrating screen, taking oversize products as building sand, enabling the moisture of the oversize products to be 16%, and enabling undersize products to enter a first high-gradient magnetic separator to a third high-gradient magnetic separator to carry out three-section step magnetic separation, so as to obtain magnetic concentrate and magnetic tailings.
And (3) performing 70-mesh dehydration classification on the magnetic concentrate through a second rigid-flexible coupling elastic screen surface vibrating screen, taking oversize products as dry-mixed mortar materials, and performing 100-mesh dehydration on undersize products through a third rigid-flexible coupling elastic screen surface vibrating screen to obtain undersize products of the 100-mesh vibrating screen.
The undersize product of a vibrating screen of 100 meshes enters a first filter for filtering, the oversize product and the filter cake of the filter are used as dry-mixed mortar materials, the main components comprise amphibole, pyroxene, chlorite and the like, the moisture of the dry-mixed mortar materials is 19%, and the filtrate is used as the circulating water of a concentrating mill.
Concentrating the magnetic separation tailings by a concentrating cyclone, and performing 120-mesh dehydration classification on the tailings flowing through a fourth rigid-flexible coupling elastic screen surface vibrating screen at the bottom.
And (3) enabling underflow of the cyclone and undersize of a fourth rigid-flexible coupling elastic screen surface vibrating screen to enter a second filter, filtering to obtain a filter cake and filtrate, mixing the filter cake and the oversize of a 120-mesh screen to obtain an architectural ceramic material, wherein the main components comprise albite, potassium feldspar and the like, the water content of the architectural ceramic material is 18%, and the filtrate is used as circulating water of a concentrating mill.
Example 2
The embodiment provides a resource utilization system of gold mine tailings, which comprises the steps of firstly, carrying out 40-50-mesh classification on the gold mine flotation tailings through a first rigid-flexible coupling elastic screen surface vibrating screen, taking oversize products as building sand, enabling the moisture of the oversize products to be 15%, and enabling undersize products to enter a first high-gradient magnetic separator to a third high-gradient magnetic separator to carry out three-section step magnetic separation, so as to obtain magnetic concentrate and magnetic tailings.
And (3) performing 70-mesh dehydration classification on the magnetic concentrate through a second rigid-flexible coupling elastic screen surface vibrating screen, taking oversize products as dry-mixed mortar materials, and performing 100-mesh dehydration on undersize products through a third rigid-flexible coupling elastic screen surface vibrating screen to obtain undersize products of the 100-mesh vibrating screen.
The undersize product of a vibrating screen of 100 meshes enters a first filter for filtering, the oversize product and the filter cake of the filter are used as dry-mixed mortar materials, the main components comprise amphibole, pyroxene, chlorite and the like, the moisture of the dry-mixed mortar materials is 18%, and the filtrate is used as the circulating water of a concentrating mill.
Concentrating the magnetic separation tailings by a concentrating cyclone, and performing 120-mesh dehydration classification on the tailings flowing through a fourth rigid-flexible coupling elastic screen surface vibrating screen at the bottom.
And (3) enabling underflow of the cyclone and undersize of a fourth rigid-flexible coupling elastic screen surface vibrating screen to enter a second filter, filtering to obtain a filter cake and filtrate, mixing the filter cake and the oversize of a 120-mesh screen to obtain an architectural ceramic material, wherein the main components comprise albite, potash feldspar and the like, the water content of the architectural ceramic material is 19%, and the filtrate is used as circulating water of a concentrating mill.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (10)
1. A resource utilization system of gold mine tailings is characterized by comprising a first vibrating screen, a first high-gradient magnetic separator, a second vibrating screen, a third vibrating screen and a first filter which are sequentially connected;
the magnetic separator also comprises a concentration cyclone, a fourth vibrating screen and a second filter which are connected in sequence, wherein the concentration cyclone is connected with the first high-gradient magnetic separator.
2. The resource utilization system of gold mine tailings according to claim 1,
the first vibrating screen is a first rigid-flexible coupling elastic screen surface vibrating screen, the second vibrating screen is a second rigid-flexible coupling elastic screen surface vibrating screen, the third vibrating screen is a third rigid-flexible coupling elastic screen surface vibrating screen, and the fourth vibrating screen is a fourth rigid-flexible coupling elastic screen surface vibrating screen.
3. The resource utilization system of gold mine tailings of claim 2, wherein the system further comprises a second high gradient magnetic separator and a third high gradient magnetic separator;
the first high-gradient magnetic separator, the second high-gradient magnetic separator and the third high-gradient magnetic separator are sequentially connected, and the magnetic field intensity is sequentially increased to form a three-section high-gradient magnetic separation process.
4. The resource utilization system of gold mine tailings of claim 3, wherein the magnetic field strength of the first high gradient magnetic separator, the second high gradient magnetic separator and the third high gradient magnetic separator is sequentially increased by at least 20%.
5. The resource utilization system of gold mine tailings of claim 1 further comprising a gold mine raw ore pretreatment unit, wherein the raw ore pretreatment unit is used for crushing and grading the gold mine raw ore.
6. The resource utilization system for gold mine tailings of claim 5, wherein the gold mine tailings pretreatment unit comprises a crusher, a fifth rigid-flexible coupled elastic screening surface vibrating screen, a ball mill and a sixth rigid-flexible coupled elastic screening surface vibrating screen, which are sequentially connected.
7. The resource utilization system for gold mine tailings of claim 6 further comprising a flotation unit, wherein the flotation unit is used for flotation of gold concentrate and flotation tailings.
8. The gold mine tailing resource utilization system according to claim 7, wherein the flotation unit comprises an ore pulp preprocessor and a flotation machine, the ore grinding product generated by the gold mine raw ore preprocessing unit enters the ore pulp preprocessor, is added with a flotation reagent and is subjected to high-speed shearing and pulp mixing, and then enters the flotation machine for flotation to generate flotation concentrate and flotation tailings, and the flotation concentrate is dehydrated into gold concentrate; the flotation tailings enter a flotation tailing treatment unit.
9. The resource utilization system of gold mine tailings of claim 2, wherein,
the mesh number of the first rigid-flexible coupling elastic screen surface vibrating screen is 40-50 meshes;
the mesh number of the second rigid-flexible coupling elastic screen surface vibrating screen is 70 meshes.
10. The resource utilization system of gold mine tailings of claim 9, wherein the mesh number of the third rigid-flexible coupling elastic screen surface vibrating screen is 100 meshes; the mesh number of the fourth rigid-flexible coupling elastic screen surface vibrating screen is 120 meshes.
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