CN215465006U - Ore X-ray preselection-crushing system - Google Patents
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- CN215465006U CN215465006U CN202120441340.3U CN202120441340U CN215465006U CN 215465006 U CN215465006 U CN 215465006U CN 202120441340 U CN202120441340 U CN 202120441340U CN 215465006 U CN215465006 U CN 215465006U
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Abstract
The sorting effect of the X-ray sorting machine is limited by the granularity factor, and the sorting precision and the processing capacity are influenced because the granularity of the selected materials is too small; the selected material has too large granularity, and useful minerals and gangue minerals are not dissociated, so that the waste throwing rate is influenced. The utility model provides an ore X-ray pre-selection-crushing system for solving the problem. The system comprises the following devices: the device comprises a first vibrating screen for primary screening, a pre-screening crushing device, a sorting device and a dehydration treatment device. The pre-selection crushing device can select one-section crushing or two-section crushing according to whether the required crushing ratio is more than 6, wherein the two-section crushing is divided into open-circuit crushing or closed-circuit crushing. Different sorting processes of the system are selected, qualified size-class materials are separated as early as possible, so that not only is the influence of ore pulverization caused by excessive crushing on the ore quantity entering waste throwing operation avoided, but also the ore with proper size class suitable for being sorted by the X-ray sorting machine is obtained to the maximum extent; thereby ensuring the sorting effect, sorting precision and processing capacity of the X-ray sorting machine.
Description
Technical Field
The utility model relates to the technical field of mineral separation, in particular to an ore X-ray preselection-crushing system.
Background
With the continuous exploitation of mineral resources, the grade of the extracted ore is increasingly depleted, the proportion of low-grade ore is higher and higher, and enterprises face the pressure of reduced benefit, discharge of fine tailings and the like. In recent years, with the continuous and deep research on X-ray sorting machines, ore pre-selection technology has been applied to enterprises. Ore pre-concentration has a number of advantages: the grade of the selected ore is improved, and the influence of interference factors is weakened; the discharge amount of fine tailings is reduced, and coarse waste rocks obtained by preselection can be used as building material raw materials; the mining quantity of the raw ore can be enlarged, and the resource utilization rate is improved. However, the sorting effect of the X-ray sorting machine is limited by the granularity factor, and the sorting precision and the processing capacity are influenced because the granularity of the selected materials is too small; the selected material has too large granularity, and useful minerals and gangue minerals are not dissociated, so that the waste throwing rate is influenced. Therefore, the preparation of the selected raw material of the X-ray sorting machine is very important.
The granularity of the mined raw ore is generally less than 500mm, some underground mining mines carry out coarse crushing on the mined raw ore underground, and the granularity of the crushed ore is generally less than 200 mm. How to maximize the ore yield meeting the requirements of the pre-selection size fraction of the X-ray separator for the raw ore with the granularity is related to the pre-selection effect. In the existing ore X-ray preselection process method, research contents are mostly concentrated on an X-ray separator and the application field thereof. For example, the application of an XNDT-104 intelligent sorting system in the twinkling antimony industry, the application of an X-ray sorting technology in phosphate ore dressing, the application of a CXR-1000X-ray sorting machine in a fen-hong-dao-opening coal mine and the like adopt the X-ray sorting machine for preselection, so that the ore grade is improved, a large amount of gangue is removed, and the crushing process before the ore enters the X-ray sorting machine is not involved; the utility model discloses an intelligent dry separation process for grading lump and granular coal, which adopts a screening machine to carry out multi-stage screening on raw coal, and each screened grade enters an intelligent dry separation system corresponding to the grade to be separated, so that clean coal and gangue are obtained, and a process method for obtaining a proper grade suitable for intelligent dry separation to the maximum extent is not involved.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an ore X-ray preselection-crushing system aiming at the technical problems, which comprises the operations of ore washing, screening, X-ray preselection, crushing and the like, only crushes the materials with the granularity larger than the upper limit of the preselection granularity, reduces the total crushed quantity of the materials, reduces the quantity of the materials with the granularity smaller than the lower limit of the preselection granularity, ensures the maximization of the quantity of the materials entering an X-ray separator, and improves the rejection rate of the whole process.
The specific technical scheme of the utility model is as follows:
an ore X-ray pre-selection-crushing system comprising the following devices:
the device comprises a first vibrating screen, a pre-selection crushing device, a sorting device and a dehydration processing device, wherein the first vibrating screen is used for receiving raw ores and carrying out primary screening on the raw ores;
the feed inlet of the pre-selection crushing device is connected with the upper material discharge outlet of the first vibrating screen, the pre-selection crushing device comprises a first crusher and a second crusher, the device comprises a first vibrating screen, a second vibrating screen and a third vibrating screen, wherein a feed port of the first vibrating screen is connected with an upper-layer material discharge port of the first vibrating screen, a feed port of the second vibrating screen is connected with one of discharge ports of the first vibrating screen, the second vibrating screen is connected with the other discharge port of the first vibrating screen, the other discharge port of the first vibrating screen is connected with a feed port of the first vibrating screen, a discharge port of the second vibrating screen is connected with a feed port of the first vibrating screen, an upper-layer material discharge port of the second vibrating screen is connected with a feed port of the third vibrating screen, a discharge port of the third vibrating screen is connected with a feed port of the second vibrating screen, a middle-layer material discharge port of the second vibrating screen is connected with a feed port of an X-ray separator in a separation device, and a lower-layer material discharge port of the second vibrating screen is connected with a powder ore product receiving end outside the system;
the sorting device comprises an X-ray sorting machine, a fourth crusher and a third vibrating screen, wherein a feed inlet of the X-ray sorting machine is connected with a middle-layer material discharge port of the first vibrating screen and a middle-layer material discharge port of the second vibrating screen, a feed inlet of the fourth crusher is connected with a discharge port of concentrate sorted by the X-ray sorting machine, the X-ray sorting machine comprises a waste stone discharge port, a feed inlet of the third vibrating screen is connected with a discharge port of the fourth crusher, an upper-layer material discharge port of the third vibrating screen is connected with a feed inlet of the fourth crusher, and a lower-layer material discharge port of the third vibrating screen is connected with a powder and ore product receiving end outside the system;
the dehydration treatment device comprises a first dehydration device and a second dehydration device, wherein a feed inlet of the first dehydration device is connected with a lower-layer material discharge port of a first vibrating screen, a feed inlet of the second dehydration device is connected with a fine-grain ore pulp material discharge port of the first dehydration device, a coarse-grain fine ore product discharge port of the first dehydration device is connected with a fine ore product receiving end outside the system, a bottom flow discharge port of the second dehydration device is connected with an ore grinding system or an independent system outside the system, and an overflow discharge port of the second dehydration device is connected with an ore washing operation system or an ore grinding classification system outside the system.
Preferably, the first vibrating screen is a double-layer vibrating screen and is one of a linear vibrating screen and a circular vibrating screen, the diameter of the upper-layer screen hole is 60-100 mm, and the diameter of the lower-layer screen hole is 5-15 mm.
Preferably, the first dewatering equipment is one of a spiral classifier or a linear sieve, and the diameter of the sieve pore is less than or equal to 1 mm; the second dewatering equipment is a thickener or an inclined thickener box.
Further preferably, the first crusher is one of a jaw crusher and a cone crusher; the second crusher and the third crusher are cone crushers.
Further preferably, the second vibrating screen is a double-layer vibrating screen and is one of a linear vibrating screen and a circular vibrating screen.
More preferably, the fourth crusher is a cone crusher; the third vibrating screen is a single layer vibrating screen and is one of a linear vibrating screen or a circular vibrating screen.
The X-ray preselector is only suitable for sorting materials with certain granularity, and sorting results with too large or too small granularity are not ideal, so that the double-layer sieve is arranged to control the granularity of the selected materials. The sieve pores of the upper layer of the double-layer sieve are larger than those of the lower layer of the sieve. The material which penetrates through the lower screen is not suitable for X-ray preselection, but contains useful components, so that the next operation flow can be directly entered; the particle size of the oversize material of the upper screen is too large and is not suitable for X-ray pre-selection, so the crushing-screening process is needed, and the ore with the suitable size fraction is obtained and then enters the X-ray for sorting.
Compared with the prior art, the utility model has the beneficial effects that:
by adding the proper crushing device before the ores enter the X-ray separator, reasonable multistage crushing and screening can be performed on the ores before the ores enter the X-ray separator according to the required ore crushing ratio, and qualified size fraction materials are separated as early as possible in the separation process, so that not only is the influence of ore pulverization caused by excessive crushing on the ore quantity entering waste throwing operation avoided, but also the proper size fraction ores suitable for the X-ray separator are obtained to the maximum extent; thereby guaranteeing the sorting effect, sorting precision and processing capacity of the X-ray sorting machine. The total amount of crushed materials is reduced, the amount of the materials smaller than the lower limit of the preselected particle size is reduced, the maximization of the amount of the materials entering the X-ray separator is ensured, and the waste throwing rate of the whole process is improved.
Drawings
FIG. 1 is a schematic diagram of the connection of an X-ray pre-selection-fragmentation system in accordance with an embodiment 1 of the present invention.
Illustration of the drawings:
wherein in FIG. 1: 1. a first double-layer circular vibrating screen; 2. jaw crushers; 3. a first cone crusher; 4. a second double-layer circular vibrating screen; 5. a second cone crusher; 6. an X-ray sorter; 7. a third cone crusher; 8. single-layer circular vibrating screen; 9. a spiral classifier; 10. a thickener.
Detailed Description
In order to facilitate an understanding of the utility model, the utility model is described more fully and in detail below, but the scope of the utility model is not limited to the following specific examples.
Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.
The working principle of the ore X-ray preselection-crushing system provided by the utility model is as follows:
1) adding water into the ore through a first vibrating screen, washing the ore and screening to obtain an upper layer material, a middle layer material and a lower layer material; the diameter sizes of the sieve pores of the upper layer screen and the lower layer screen respectively correspond to the upper limit and the lower limit of the granularity required by the X-ray separator;
2) the lower layer material is treated by first dewatering equipment to obtain coarse-grained qualified fine ore products and fine-grained ore pulp materials; the fine-fraction ore pulp material is treated by a second dewatering device, the underflow is fed into a subsequent ore grinding system or an independent system, and the overflow returns to ore washing operation or is fed into an ore grinding grading system;
3) selecting the crushing process of the upper layer material according to the maximum particle size, if the crushing ratio required by the upper layer material is less than or equal to 6, crushing the upper layer material by one section, feeding the material into a first crusher, and returning the crushed material to a first vibrating screen;
if the crushing ratio of the upper-layer materials is more than 6, adopting two-stage crushing, wherein the two-stage crushing is open-circuit crushing or closed-circuit crushing;
when the crusher is opened, the first crusher and the second crusher are connected in series, the material passes through the two crushers to obtain a crushed product, and the crushed product returns to the first vibrating screen;
when the closed-circuit crushing is carried out, the materials enter a first crusher to obtain crushed products, the crushed products enter a second vibrating screen for screening, the lower layer of materials are fine ore products with qualified granularity, the upper layer of materials enter a third crusher for crushing and then return to the second vibrating screen, and the middle layer of materials are merged into the middle layer of materials of the first vibrating screen to form ore feeding of the X-ray separator;
4) and (4) the middle layer material enters an X-ray separator for preselection to obtain preselection concentrate and waste rocks, and the preselection concentrate is subjected to closed-circuit crushing treatment consisting of a fourth crusher and a third vibrating screen to obtain a fine ore product with qualified granularity.
The X-ray pre-selection-crushing system provided by the utility model can select different crushing paths according to different required crushing ratios. The method for selecting the crushing flow path is to select different crushing paths by looking at the maximum grain size of the raw ore on the operation site. For a certain object, the maximum granularity of the raw ore is basically determined, and the granularity of the mined ore is limited in the mining operation; however, for a very small number of raw ores with the granularity larger than 400mm, the overlarge raw ores can be crushed by adopting an artificial mechanical monomer before entering the system.
Specific ways of selecting a crushing path in the present invention are exemplified as follows:
1) if the maximum granularity of the raw ore is 160mm and the needed granularity after crushing is 35mm (the actual maximum granularity of discharged materials is 60mm), the crushing ratio is 4.57 and is less than or equal to 6, so that only one section of crushing is needed.
2) If the maximum particle size of the raw ore is 400mm and the desired particle size after crushing is 35mm (the actual maximum particle size of the discharged material is 60mm), the crushing ratio is 11.43 and > 6, so that two-stage crushing needs to be selected. The first stage of crushing is from 400mm to 100mm, and the crushing ratio is 4; the second stage of crushing is from 100mm to 35mm, and the crushing ratio is 2.86.
3) If there are few raw ores with the granularity larger than 400mm, the raw ores are mechanically crushed into the size smaller than 400mm before entering the system.
Example 1
An ore X-ray preselection-crushing system comprises a first double-layer circular vibrating screen 1 for receiving raw ore and primarily screening the raw ore, a pre-selection crushing device, a sorting device and a dehydration processing device as shown in figure 1.
The feed port of the pre-selection crushing device is connected with the upper-layer material discharge port of the first double-layer circular vibrating screen 1, the pre-selection crushing device comprises a jaw crusher 2, a first cone crusher 3, a second double-layer circular vibrating screen 4 and a second cone crusher 5, the feed port of the jaw crusher 2 is connected with the upper-layer material discharge port of the first double-layer circular vibrating screen 1, the feed port of the first cone crusher 3 is connected with one of the discharge ports of the jaw crusher 2, the second double-layer circular vibrating screen 4 is connected with two of the discharge ports of the jaw crusher 2, the other discharge port of the jaw crusher 2 is connected with the feed port of the first double-layer circular vibrating screen 1, the discharge port of the first cone crusher 3 is connected with the feed port of the first double-layer circular vibrating screen 1, the upper-layer material discharge port of the second double-layer circular vibrating screen 4 is connected with the feed port of the second cone crusher 5, the discharge port of the second cone crusher 5 is connected with the feed port of the second double-layer circular vibrating screen 4, the middle layer material discharge port of the second double-layer circular vibrating screen 4 is connected with the feed port of the X-ray separator in the separation device, and the lower layer material discharge port of the second double-layer circular vibrating screen 4 is connected with the powder ore product receiving end outside the system.
The sorting device comprises an X-ray sorting machine 6, a third cone crusher 7 and a single-layer cone vibrating screen 8, wherein a feed inlet of the X-ray sorting machine 6 is connected with a middle-layer material discharge hole of a first double-layer cone vibrating screen 1 and a middle-layer material discharge hole of a second double-layer cone vibrating screen 4, a feed inlet of the third cone crusher 7 is connected with a discharge hole of concentrate after the X-ray sorting machine 6 sorts, the X-ray sorting machine 6 comprises a waste stone discharge hole, a feed inlet of the single-layer cone vibrating screen 8 is connected with a discharge hole of the third cone crusher 7, an upper-layer material discharge hole of the single-layer cone vibrating screen 8 is connected with a feed inlet of the third cone crusher 7, and a lower-layer material discharge hole of the single-layer cone vibrating screen 8 is connected with a powder ore product receiving end outside the system.
The dehydration treatment device comprises a spiral classifier 9 and a thickener 10, wherein a feed inlet of the spiral classifier 9 is connected with a lower-layer material discharge port of the first double-layer circular vibrating screen 1, a feed inlet of the thickener 10 is connected with a fine-grain ore pulp material discharge port of the spiral classifier 9, a coarse-grain powder ore product discharge port of the spiral classifier 9 is connected with a powder ore product receiving end outside the system, a bottom flow discharge port of the thickener 10 is connected with an ore grinding system or an independent system outside the feeding system, and an overflow discharge port of the thickener 10 is connected with an ore washing operation system or an ore grinding classification system outside the system.
The foregoing is considered as illustrative of the preferred embodiments of the utility model and is not to be construed as limiting the utility model in any way. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (6)
1. An ore X-ray pre-selection-crushing system, characterized by comprising the following devices:
the device comprises a first vibrating screen, a pre-selection crushing device, a sorting device and a dehydration processing device, wherein the first vibrating screen is used for receiving raw ores and carrying out primary screening on the raw ores;
the feed inlet of the pre-selection crushing device is connected with the upper material discharge outlet of the first vibrating screen, the pre-selection crushing device comprises a first crusher and a second crusher, the device comprises a first vibrating screen, a second vibrating screen and a third vibrating screen, wherein a feed port of the first vibrating screen is connected with an upper-layer material discharge port of the first vibrating screen, a feed port of the second vibrating screen is connected with one of discharge ports of the first vibrating screen, the second vibrating screen is connected with the other discharge port of the first vibrating screen, the other discharge port of the first vibrating screen is connected with a feed port of the first vibrating screen, a discharge port of the second vibrating screen is connected with a feed port of the first vibrating screen, an upper-layer material discharge port of the second vibrating screen is connected with a feed port of the third vibrating screen, a discharge port of the third vibrating screen is connected with a feed port of the second vibrating screen, a middle-layer material discharge port of the second vibrating screen is connected with a feed port of an X-ray separator in a separation device, and a lower-layer material discharge port of the second vibrating screen is connected with a powder ore product receiving end outside the system;
the sorting device comprises an X-ray sorting machine, a fourth crusher and a third vibrating screen, wherein a feed inlet of the X-ray sorting machine is connected with a middle-layer material discharge port of the first vibrating screen and a middle-layer material discharge port of the second vibrating screen, a feed inlet of the fourth crusher is connected with a discharge port of concentrate sorted by the X-ray sorting machine, the X-ray sorting machine comprises a waste stone discharge port, a feed inlet of the third vibrating screen is connected with a discharge port of the fourth crusher, an upper-layer material discharge port of the third vibrating screen is connected with a feed inlet of the fourth crusher, and a lower-layer material discharge port of the third vibrating screen is connected with a powder and ore product receiving end outside the system;
the dehydration treatment device comprises a first dehydration device and a second dehydration device, wherein a feed inlet of the first dehydration device is connected with a lower-layer material discharge port of a first vibrating screen, a feed inlet of the second dehydration device is connected with a fine-grain ore pulp material discharge port of the first dehydration device, a coarse-grain fine ore product discharge port of the first dehydration device is connected with a fine ore product receiving end outside the system, a bottom flow discharge port of the second dehydration device is connected with an ore grinding system or an independent system outside the system, and an overflow discharge port of the second dehydration device is connected with an ore washing operation system or an ore grinding classification system outside the system.
2. An ore X-ray preselection-crushing system as claimed in claim 1, wherein the first vibrating screen is a double-deck vibrating screen and is one of a linear vibrating screen and a circular vibrating screen, the diameter of the upper screen hole is 60 to 100mm, and the diameter of the lower screen hole is 5 to 15 mm.
3. An ore X-ray pre-selection-crushing system according to claim 1, characterized in that the first dewatering equipment is one of a spiral classifier or a linear sieve, and the diameter of the sieve pore is less than or equal to 1 mm; the second dewatering equipment is a thickener or an inclined thickener box.
4. An ore X-ray pre-selection-crushing system as claimed in claim 1, wherein the first crusher is one of a jaw crusher or a cone crusher; the second crusher and the third crusher are cone crushers.
5. An ore X-ray preselection-crushing system as claimed in claim 1 wherein the second shaker is a double layer shaker and is one of a linear shaker or a circular shaker.
6. An ore X-ray preselection-crushing system as claimed in claim 1, wherein the fourth crusher is a cone crusher; the third vibrating screen is a single layer vibrating screen and is one of a linear vibrating screen or a circular vibrating screen.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112844763A (en) * | 2021-03-01 | 2021-05-28 | 长沙矿冶研究院有限责任公司 | Ore X-ray preselection-crushing system and process thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112844763A (en) * | 2021-03-01 | 2021-05-28 | 长沙矿冶研究院有限责任公司 | Ore X-ray preselection-crushing system and process thereof |
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