CN212263543U - Gravity sorting system - Google Patents
Gravity sorting system Download PDFInfo
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- CN212263543U CN212263543U CN202020787903.XU CN202020787903U CN212263543U CN 212263543 U CN212263543 U CN 212263543U CN 202020787903 U CN202020787903 U CN 202020787903U CN 212263543 U CN212263543 U CN 212263543U
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Abstract
The utility model discloses a gravity sorting system, which comprises a spiral chute for roughing, a spiral chute for first-stage concentration, a spiral chute for second-stage concentration, a spiral chute for first-stage scavenging and a spiral chute for second-stage scavenging; the moment-to-diameter ratio of the spiral chute for roughing is 0.50-0.55, and the transverse inclination angle is 8.7-9.3 degrees; the ratio of the moments of the first-stage spiral chute and the second-stage spiral chute for fine selection is 0.58-0.62, and the transverse inclination angle is 9.5-10.5 degrees; the ratio of the moments of the spiral chute for the first-stage scavenging and the spiral chute for the second-stage scavenging is 0.43-0.47, and the transverse inclination angle is 8.2-8.6 degrees; utilize above-mentioned sorting system through roughing, choice and scavenging, can promote the grade and the rate of recovery of concentrate greatly, just the utility model has the advantages of production operation is simple and convenient, low consumption, green, index are stable, can adapt to large-scale ore dressing production requirement, the production index is superior.
Description
Technical Field
The utility model belongs to the ore dressing field, concretely relates to gravity separation system.
Background
The chromite resources are mainly distributed in Africa, south Africa and Zimbabwe, and account for 97 percent of the total amount of the world. Because of the lack of chromite resources in China, a large amount of imported chromite is needed every year, the imported high-grade block ore raw ore is mainly used at first, but along with the gradual reduction of the high-grade block ore raw ore resources, the enough high-grade chromite block ore raw ore is more and more difficult to obtain, the stockpiling amount of the waste medium-low-grade chromite raw ore in the mine is more and more, and an effective ore dressing device and an effective ore dressing system are urgently needed to be developed to sort out high-grade chromium concentrate from the low-grade chromite raw ore. Although the chromite beneficiation device has multiple beneficiation devices such as gravity separation, magnetic separation, flotation and the like, the flotation device has the defects of high cost, pollution of chemicals and poor selectivity of the magnetic separation device, so the chromite beneficiation method and device are the most effective and main beneficiation method, and the gravity separation devices and devices such as a table concentrator, a jigger, a spiral chute and the like are all applied, but the table concentrator is applied most, and the jigger is usually only suitable for the beneficiation of lump ores and cannot be suitable for the beneficiation of fine-grained minerals. The conventional spiral chute is adopted to separate chromite, and because the enrichment performance of the conventional spiral chute is limited, chromium concentrate with high enough grade cannot be directly obtained, and a table concentrator is required to be configured for concentration so as to obtain qualified chromium concentrate. The shaking table has the advantages of small single machine processing capacity (0.3-1t/h table) and large water consumption (1-3 m)3The/h table), the technical requirement of the operation of workers is high, the occupied area is large, the large-scale configuration is not easy, and the like, and the requirements of large-scale chromite ore dressing production cannot be met. Along with the increasing requirement of chromite ore dressing scale, the original ore dressing system adopting the 'swing bed' or the 'spiral chute + swing bed' configuration can not meet the requirement of large-scale production, and the development of the chromite gravity dressing system which has simple configuration, simple and convenient operation, easy maintenance, low consumption, cleanness and easy realization of large-scale production is urgently neededA mine installation and a sorting system.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the needs that the ore dressing is extensive, clean, low consumption, easy operation, develop one kind and adopt single gravity to select separately the system. The adopted gravity separation equipment can meet the requirement of large-scale production, and has enough enrichment performance, and the metal recovery rate is not lower than that of other ore dressing devices.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a gravity sorting system is characterized by comprising a spiral chute for roughing, a spiral chute for first-stage concentration, a spiral chute for second-stage concentration, a spiral chute for first-stage scavenging and a spiral chute for second-stage scavenging; the ratio of the moments to the diameters of the spiral chutes for roughing is 0.50-0.55, and the transverse inclination angle is 8.7-9.3 degrees; the ratio of the moments of the first-stage spiral chute for fine selection and the second-stage spiral chute for fine selection is 0.58-0.62, and the transverse inclination angle is 9.5-10.5 degrees; the ratio of the moments to the diameters of the first-stage scavenging spiral chute and the second-stage scavenging spiral chute is 0.43-0.47, and the transverse inclination angle is 8.2-8.6 degrees; wherein the moment-to-diameter ratio A of the spiral chute is the ratio of the pitch H to the diameter D of the spiral groove. The transverse inclination angle B is the included angle between the horizontal line and the connecting line of the origin and the terminal of the shape curve (cubic parabola) of the cross section.
The upper ends of the spiral chute for roughing, the spiral chute for first-stage concentration, the spiral chute for second-stage concentration, the spiral chute for first-stage scavenging and the spiral chute for second-stage scavenging are provided with ore pulp inlets, the lower ends of the spiral chute for roughing, the spiral chute for first-stage concentration, the spiral chute for second-stage concentration, the spiral chute for first-stage scavenging and the spiral chute for second-stage scavenging are provided with a concentrate discharge port, a middling discharge port and a tailing discharge port, the concentrate discharge port of the spiral chute for roughing and the concentrate discharge port of the spiral chute for first-stage scavenging are connected with the ore pulp inlet of the spiral chute for first-stage concentration, the middling discharge port and the tailing discharge port of the spiral chute for roughing are connected with the ore pulp inlet of the spiral chute for first-stage concentration and the tailing discharge port of the spiral chute for second-stage concentration are; the concentrate discharge port of the spiral chute for first-stage concentration and the middling discharge port of the spiral chute for second-stage concentration are connected with the ore pulp inlet of the spiral chute for second-stage concentration, and the middling discharge port and the tailing discharge port of the spiral chute for first-stage scavenging are connected with the ore pulp inlet of the spiral chute for second-stage scavenging.
Further, the rough selection spiral chute, the first section spiral chute for fine selection, the second section spiral chute for fine selection, the first section spiral chute for scavenging and the second section spiral chute for scavenging are arranged at the same horizontal position.
Furthermore, a first ore pulp pool is connected between the concentrate discharge port of the spiral chute for roughing, the concentrate discharge port of the spiral chute for primary scavenging and the ore pulp inlet of the spiral chute for primary concentrating, and a second ore pulp pool is connected between the middling discharge port of the spiral chute for roughing, the tailing discharge port of the spiral chute for primary concentrating, the tailing discharge port of the spiral chute for secondary concentrating and the ore pulp inlet of the spiral chute for primary scavenging; and a third ore pulp pond is connected between the concentrate discharge port of the spiral chute for primary concentration, the middling discharge port of the spiral chute for secondary concentration and the ore pulp inlet of the spiral chute for secondary concentration, a fourth ore pulp pond is connected between the middling discharge port and the tailing discharge port of the spiral chute for primary sweeping and the ore pulp inlet of the spiral chute for secondary sweeping, and the first ore pulp pond, the second ore pulp pond, the third ore pulp pond and the fourth ore pulp pond are all provided with ore pulp pumps.
Furthermore, the number of the spiral chutes for rough selection, the spiral chutes for first-stage concentration, the spiral chutes for second-stage concentration, the spiral chutes for first-stage scavenging and the spiral chutes for second-stage scavenging is single or multiple and connected in parallel.
The middlings in the spiral chute for the first-stage concentration are directly returned to the ball mill for ball milling, the middlings and tailings in the spiral chute for the second-stage scavenging are directly discarded, and the concentrate in the spiral chute for the second-stage concentration is used as a final concentrate product.
The utility model has the advantages that: the utility model discloses a different moment radius ratio and the spiral chute at horizontal inclination constitute thick, smart, the gravity of sweeping is selected separately the flow, and in choice operation section, the spiral chute of configuration has bigger distance radius ratio and horizontal inclination, and the ore pulp velocity of flow is bigger, and centrifugal force is bigger, can effectively improve the grade of concentrate. In the scavenging operation section, the spiral chute has smaller distance-diameter ratio and transverse inclination angle, the pulp flow velocity is smaller, and the recovery effect of the fine chromium ore can be effectively improved. Just the utility model has the advantages of production operation is simple and convenient, the low consumption, green, the index is stable, can adapt to large-scale ore dressing production requirement, the production index is superior.
Drawings
Fig. 1 is a configuration diagram of a gravity sorting system.
Fig. 2 is a schematic view of the moment to diameter ratio a of the spiral chute.
Fig. 3 is a schematic diagram of a cross-sectional curve and a transverse inclination angle B of the spiral chute.
FIG. 4 is a process flow chart for chromite separation using the separation system of the present invention.
Wherein, 1 is the spiral chute for the rough concentration, 2 is one section spiral chute for the choice, 3 is the spiral chute for the second section essence, 4 is one section sweep for use the spiral chute, 5 is two sections spiral chute, 6 is first ore pulp pond, 7 is the second ore pulp pond, 8 is the third ore pulp pond, 9 is the fourth ore pulp pond, 10 is the ore pulp pump.
Detailed Description
The present invention will be further explained with reference to the following description of the drawings.
EXAMPLE 1
A gravity separation system is shown in figure 1 and comprises a spiral chute 1 for rough selection, a spiral chute 2 for first-stage refining, a spiral chute 3 for second-stage refining, a spiral chute 4 for first-stage sweeping, a spiral chute 5 for second-stage sweeping, a first slurry pool 6, a second slurry pool 7, a third slurry pool 8 and a fourth slurry pool 9; the spiral chute 1 for roughing, the spiral chute 2 for first-stage concentration, the spiral chute 3 for second-stage concentration, the spiral chute 4 for first-stage sweeping and the spiral chute 5 for second-stage sweeping are arranged at the same horizontal position, the spiral chute 1 for roughing, the spiral chute 2 for first-stage concentration, the spiral chute 3 for second-stage concentration, the spiral chute 4 for first-stage sweeping and the spiral chute 5 for second-stage sweeping are provided with ore pulp inlets at the upper ends, the spiral chute 1 for roughing, the spiral chute 2 for first-stage concentration, the spiral chute 3 for second-stage concentration, the spiral chute 4 for first-stage sweeping and the spiral chute 5 for second-stage sweeping are provided with ore pulp outlets, a middling discharge outlet and a tailing discharge outlet at the lower ends, the spiral chute 1 for roughing, the spiral chute 4 for first-stage sweeping and the ore pulp inlet of the spiral chute 2 for first-stage concentration are connected with a first ore pulp tank 6, and the middling discharge outlet, A tailing discharge port of the first-stage concentration spiral chute 2, a tailing discharge port of the second-stage concentration spiral chute 3 and an ore pulp inlet of the first-stage scavenging spiral chute 4 are connected with a second ore pulp pool 7; the concentrate discharge port of the spiral chute 2 is selected for first-stage concentration, the middling discharge port of the spiral chute 3 is selected for second-stage concentration, and the pulp inlet of the spiral chute 3 is connected with a third pulp pond 8, the middling discharge port of the spiral chute 4 is selected for first-stage sweeping, the tailing discharge port and the pulp inlet of the spiral chute 4 are connected with a fourth pulp pond 9, the first pulp pond 6, the second pulp pond 7, the third pulp pond 8 and the fourth pulp pond 9 are all provided with pulp pumps 10, and the pulp of each pulp pond is conveyed to the pulp inlet of each spiral chute through the pulp pumps 10.
As shown in fig. 2 and 3, the diameter of a spiral chute 1 for roughing, a spiral chute 2 for first-stage fine selection, a spiral chute 3 for second-stage fine selection, a spiral chute 4 for first-stage sweeping and a spiral chute 5 for second-stage sweeping are 1500mm, the ratio of the moment to the diameter A of the spiral chute 1 for roughing is 0.55, and the transverse inclination angle B is 9 degrees; the moment-to-diameter ratio A of a spiral chute 1 for roughing, a spiral chute 2 for first-stage fine selection, a spiral chute 3 for second-stage fine selection, a spiral chute 4 for first-stage sweeping and a spiral chute 5 for second-stage sweeping is 0.60, and the transverse inclination angle B is 10 degrees; the ratio of the moment to the diameter A of the spiral chute 4 for the first-stage sweeping and the spiral chute 5 for the second-stage sweeping is 0.45, and the transverse inclination angle B is 8.5 degrees.
The sorting system is used for sorting, and as shown in fig. 4, the specific process flow is as follows: grade 26.75% (Cr)2O3) The chromite raw ore is crushed in two sections, enters a ball mill for grinding, is graded, the part with the granularity of more than 0.5mm returns to the ball mill for grinding, the raw ore with the granularity of less than 0.5mm enters a spiral chute 1 for roughing, and the concentrate after roughing is introduced into a spiral chute 1The ore pulp in the first ore pulp pool 6 is pumped into an ore pulp inlet of a first-stage spiral chute 2 for fine concentration by an ore pulp pump 10, middlings and tailings after rough concentration are discharged from an ore discharge port and then enter a second ore pulp pool, and the ore pulp in the second ore pulp pool 7 is pumped into an inlet of a first-stage spiral chute 4 for sweeping by the ore pulp pump 10; the concentrate obtained by the first-stage concentration is discharged and then pumped into the ore pulp inlet of the second-stage concentration spiral chute 3 through the third ore pulp tank 8 and the ore pulp pump 10, the middlings obtained by the first-stage concentration are returned to the ball mill for regrinding, and the tailings obtained by the first-stage concentration are pumped into the ore pulp inlet of the first-stage scavenging spiral chute 4 through the second ore pulp tank 7 and the ore pulp pump 10; concentrate obtained by second-stage concentration is used as final concentrate; middlings obtained by the second-stage concentration enter a third pulp tank 8 and are pumped into a pulp inlet of a spiral chute 3 for the second-stage concentration through a pulp pump 10, and tailings obtained by the second-stage concentration enter a second pulp tank 7 and enter a pulp inlet of a spiral chute 4 for the first-stage scavenging through the pulp pump 10; the concentrate obtained by the first-stage scavenging enters a first slurry pool 6, the concentrate is pumped into the slurry inlet of a first-stage concentration spiral chute 2 through a slurry pump 10, the middlings and the tailings obtained by the first-stage scavenging enter a fourth slurry pool 9, the concentrate obtained by the second-stage scavenging enters a slurry inlet of a second-stage scavenging spiral chute 5 through the slurry pump 10, the concentrate obtained by the second-stage scavenging returns to a ball mill for regrinding, and the middlings and the tailings obtained by the second-stage scavenging are directly removed. The concentrate grade of the obtained chromite is 49.56% (Cr)2O3) The yield was 48.67%, and the recovery was 90.16%.
Example 2
On the basis of the embodiment 1, the number of spiral chutes 1 for roughing, 2 for first-stage fine selection, 3 for second-stage fine selection, 4 for first-stage sweeping and 5 for second-stage sweeping is 3. The moment-to-diameter ratio A of the spiral chute 1 for roughing is 0.50, and the transverse inclination angle B is 8.7 degrees; the ratio of the moment to the diameter A of the first-stage spiral chute 2 and the second-stage spiral chute 3 for fine selection is 0.62, and the transverse inclination angle B is 10.5 degrees; the ratio of the moment to the diameter A of the spiral chute 4 for the first-stage sweeping and the spiral chute 5 for the second-stage sweeping is 0.43, the transverse inclination angle B is 8.2 degrees, and the grade is 26.75 percent (Cr)2O3) After the chromite is separated, the obtained concentrate of the chromiteBit 49.71% (Cr)2O3) The yield was 47.56% and the recovery was 88.38%.
Example 3
On the basis of the embodiment 1, the number of spiral chutes 1 for roughing, 2 for first-stage refining, 3 for second-stage refining, 4 for first-stage sweeping and 5 for second-stage sweeping is 4. The moment-to-diameter ratio A of the spiral chute 1 for roughing is 0.50, and the transverse inclination angle B is 9.3 degrees; the ratio A of the moment to the diameter of the first-stage spiral chute 2 and the second-stage spiral chute 3 for fine selection is 0.58, and the transverse inclination angle B is 9.5 degrees; the ratio of the moment to the diameter A of the spiral chute 4 for the first-stage sweeping and the spiral chute 5 for the second-stage sweeping is 0.47, the transverse inclination angle B is 8.6 degrees, and the concentrate grade of the obtained chromite is 48.81 percent (Cr)2O3) The yield was 49.12% and the recovery was 89.63%.
Through the utility model discloses technical scheme, the choice has bigger pitch diameter ratio and horizontal inclination with the spiral chute, and the ore pulp velocity of flow is bigger, and centrifugal force is bigger, can effectively improve the grade of concentrate. In turn, the spiral chute for scavenging has smaller distance-diameter ratio and transverse inclination angle, the pulp flow velocity is smaller, and the recovery effect of the fine-grained chromium ore can be effectively improved. Through the reasonable configuration of the process and the equipment, on the premise of ensuring the beneficiation index of the chromite, the production scale of chromite beneficiation is effectively improved, and compared with the traditional chromite beneficiation process, the method has the advantages that the large-scale production is easier to realize, the operation is easier, and the index is more stable.
Claims (5)
1. A gravity sorting system is characterized by comprising a spiral chute for roughing, a spiral chute for first-stage concentration, a spiral chute for second-stage concentration, a spiral chute for first-stage scavenging and a spiral chute for second-stage scavenging; the ratio of the moments to the diameters of the spiral chutes for roughing is 0.50-0.55, and the transverse inclination angle is 8.7-9.3 degrees; the ratio of the moments of the first-stage spiral chute for fine selection and the second-stage spiral chute for fine selection is 0.58-0.62, and the transverse inclination angle is 9.5-10.5 degrees; the ratio of the moments of the spiral chute for the first-stage scavenging and the spiral chute for the second-stage scavenging is 0.43-0.47, and the transverse inclination angle is 8.2-8.6 degrees.
2. The gravity separation system according to claim 1, wherein the upper ends of the spiral chute for roughing, the spiral chute for first-stage concentration, the spiral chute for second-stage concentration, the spiral chute for first-stage scavenging and the spiral chute for second-stage scavenging are all provided with ore pulp inlets, the lower ends of the spiral chute for roughing, the spiral chute for first-stage concentration, the spiral chute for second-stage concentration, the spiral chute for first-stage scavenging and the spiral chute for second-stage scavenging are all provided with a concentrate discharge port, a middling discharge port and a tailing discharge port, the concentrate discharge port of the spiral chute for roughing and the concentrate discharge port of the spiral chute for scavenging are connected with the ore pulp inlet of the spiral chute for selecting, the middling discharge port and the tailing discharge port of the spiral chute for roughing, the tailing discharge port of the spiral chute for first-stage concentration and the tailing discharge port of the spiral chute for second-stage concentration are connected with the ore pulp inlet of the spiral chute for first-stage scavenging; the concentrate discharge port of the spiral chute for first-stage concentration and the middling discharge port of the spiral chute for second-stage concentration are connected with the ore pulp inlet of the spiral chute for second-stage concentration, and the middling discharge port and the tailing discharge port of the spiral chute for first-stage scavenging are connected with the ore pulp inlet of the spiral chute for second-stage scavenging.
3. The gravity sorting system according to claim 1, wherein the roughing spiral chute, the first-stage concentration spiral chute, the second-stage concentration spiral chute, the first-stage scavenging spiral chute and the second-stage scavenging spiral chute are arranged at the same horizontal position.
4. The gravity separation system according to claim 1, wherein a first slurry tank is connected between the concentrate discharge port of the spiral chute for roughing, the concentrate discharge port of the spiral chute for primary scavenging and the slurry inlet of the spiral chute for primary concentrating, and a second slurry tank is connected between the middling discharge port of the spiral chute for roughing, the tailing discharge port of the spiral chute for primary concentrating, the tailing discharge port of the spiral chute for secondary concentrating and the slurry inlet of the spiral chute for primary scavenging; and a third ore pulp pond is connected between the concentrate discharge port of the spiral chute for primary concentration, the middling discharge port of the spiral chute for secondary concentration and the ore pulp inlet of the spiral chute for secondary concentration, a fourth ore pulp pond is connected between the middling discharge port and the tailing discharge port of the spiral chute for primary sweeping and the ore pulp inlet of the spiral chute for secondary sweeping, and the first ore pulp pond, the second ore pulp pond, the third ore pulp pond and the fourth ore pulp pond are all provided with ore pulp pumps.
5. The gravity sorting system according to claim 1, wherein the number of the spiral chutes for rough selection, the spiral chutes for first-stage concentration, the spiral chutes for second-stage concentration, the spiral chutes for first-stage scavenging and the spiral chutes for second-stage scavenging is single or multiple and connected in parallel.
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| CN202020787903.XU CN212263543U (en) | 2020-05-13 | 2020-05-13 | Gravity sorting system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111450990A (en) * | 2020-05-13 | 2020-07-28 | 江西理工大学 | Gravity separation system and chromite beneficiation method |
| CN113145294A (en) * | 2021-04-02 | 2021-07-23 | 中钢天源安徽智能装备股份有限公司 | Chromite beneficiation system and beneficiation process |
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2020
- 2020-05-13 CN CN202020787903.XU patent/CN212263543U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111450990A (en) * | 2020-05-13 | 2020-07-28 | 江西理工大学 | Gravity separation system and chromite beneficiation method |
| CN113145294A (en) * | 2021-04-02 | 2021-07-23 | 中钢天源安徽智能装备股份有限公司 | Chromite beneficiation system and beneficiation process |
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