CN111450990A - Gravity separation system and chromite beneficiation method - Google Patents
Gravity separation system and chromite beneficiation method Download PDFInfo
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- CN111450990A CN111450990A CN202010403082.XA CN202010403082A CN111450990A CN 111450990 A CN111450990 A CN 111450990A CN 202010403082 A CN202010403082 A CN 202010403082A CN 111450990 A CN111450990 A CN 111450990A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/62—Washing granular, powdered or lumpy materials; Wet separating by hydraulic classifiers, e.g. of launder, tank, spiral or helical chute concentrator type
- B03B5/626—Helical separators
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Abstract
The invention discloses a gravity separation system and a chromite beneficiation method, wherein the separation system 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 A of the roughly selected spiral chute is 0.50-0.55, and the transverse inclination angle B is 8.7-9.3 degrees; the ratio of the moment to the diameter A of the spiral slips selected for the first stage of refining and the spiral slips selected for the second stage of refining is 0.58-0.62, and the transverse inclination angle B is 9.5-10.5 degrees; the ratio of the moment to the diameter A 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 B is 8.2-8.6 degrees. The separation system is used for roughing, concentrating and scavenging, the processing capacity of ore dressing and the grade and recovery rate of chromite concentrate can be greatly improved, and the method has the advantages of simple and convenient production operation, low consumption, environmental protection, stable index and the like, can meet the production requirement of large-scale chromite ore dressing, and has superior production index.
Description
Technical Field
The invention belongs to the field of ore dressing, and particularly relates to a gravity separation system and an ore dressing method for chromite.
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. Due to the lack of chromite resources, China needs a large amount of imported chromite every year, primarily imports high-grade block ore raw ore, but as the high-grade block ore raw ore resources are gradually reduced, the chromite block ore raw ore with high grade is more and more difficult to obtain, and the stockpiling amount of the waste medium-low grade chromite raw ore in mines is more and more, so that an effective ore dressing method is urgently needed to be developed to select high-grade chromium concentrate from the medium-low grade chromite raw ore. Although the chromite beneficiation method has multiple types of gravity separation, magnetic separation, flotation and chemical beneficiation, the flotation has the defects of high cost and pollution of reagents, the magnetic separation has the defect of poor selectivity, and the chemical beneficiation has the problems of high cost and high pollution, so the chromite gravity separation method is the most effective and main beneficiation method, and a shaking table, a jigging table and a spiral chute are all applied, but the shaking table is applied most, and the jigging 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 (0.3-1 t/h) and large water consumption (1-3 m)3The table), high operating technical requirements of workers, large occupied area, difficult mass configuration and the like, and can not meet the requirements of large-scale chromite ore dressing production. With the increasing requirement of chromite beneficiation scale, the conventional beneficiation process adopting a 'shaking table' or a 'spiral chute + shaking table' configuration cannot meet the requirement of large-scale production, and the development of the chromite beneficiation process and method which have the advantages of simple flow, simple and convenient operation, easy maintenance, low consumption, cleanness and easy realization of large-scale production is urgently needed.
Disclosure of Invention
The invention develops a chromite beneficiation method which adopts a single gravity beneficiation method and a single type gravity concentration equipment configuration aiming at the requirements of large-scale, clean, low consumption and easy operation of chromite beneficiation. The adopted gravity separation equipment and the process not only can meet the requirement of large-scale production of chromite, but also have enough enrichment performance, can directly obtain chromium concentrate with qualified grade, and have metal recovery rate not lower than that of other ore dressing methods.
In order to achieve the purpose, the invention 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 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. The rough selection spiral chute has the moment-to-diameter ratio of 0.50-0.55 and the transverse inclination angle of 8.7-9.3 degrees; the ratio of the moment to the diameter of the spiral chute for the first-section two-section selection and the spiral chute for the second-section selection is 0.58-0.62, and the transverse inclination angle is 9.5-10.5 degrees; the ratio of the moment to the diameter of the spiral chute for the first-stage sweeping and the spiral chute for the second-stage sweeping is 0.43-0.47, and the transverse inclination angle is 8.2-8.6 degrees. The spiral chute moment-to-diameter ratio A is the ratio of the pitch H to the diameter D of the spiral groove, H is the pitch, and D is the diameter of the spiral groove; and the transverse inclination angle B is an included angle between a connecting line of the origin and the terminal of the cubic parabola and a horizontal line.
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.
Further, a concentrate discharge port of the spiral chute for roughing, a concentrate discharge port of the spiral chute for primary scavenging and an ore pulp inlet of the spiral chute for primary concentrating are connected with a first ore pulp pool, and a middling discharge port and a tailing discharge port of the spiral chute for roughing, a tailing discharge port of the spiral chute for primary concentrating, a tailing discharge port of the spiral chute for secondary concentrating and an ore pulp inlet of the spiral chute for primary scavenging are connected with a second ore pulp pool; the ore concentrate discharge port of the spiral chute for the first-stage concentration, the middling discharge port of the spiral chute for the second-stage concentration and the ore pulp inlet of the spiral chute for the second-stage concentration are connected with a third ore pulp pond, the middling discharge port of the spiral chute for the first-stage sweeping and the tailing discharge port of the spiral chute for the second-stage sweeping are connected with a fourth ore pulp pond, 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.
A chromite beneficiation method utilizing the gravity separation system comprises the following steps:
the raw ore is crushed in two sections and then enters a ball mill for grinding, then the raw ore is graded, the part with the granularity larger than 0.5mm returns to the ball mill for regrinding, the raw ore with the granularity smaller than 0.5mm enters a spiral chute for roughing, the concentrate after roughing is discharged from a concentrate discharge port of the spiral chute for roughing and then enters an ore pulp inlet of the spiral chute for first section of fine separation, and the middlings and tailings after roughing are discharged and then enter an inlet of the spiral chute for first section of scavenging; the concentrate obtained by the first-stage concentration enters an ore pulp inlet of a spiral chute for the second-stage concentration, the middlings obtained by the first-stage concentration return to a ball mill for regrinding, and the tailings obtained by the first-stage concentration enter the ore pulp inlet of the spiral chute for the first-stage scavenging; concentrate obtained by second-stage concentration is used as final concentrate; the middlings obtained by the second-stage concentration enter an ore pulp inlet of a spiral chute for the second-stage concentration, and the tailings obtained by the second-stage concentration enter an ore pulp inlet of a spiral chute for the first-stage scavenging; the concentrate obtained by the first-stage scavenging enters an ore pulp inlet of a spiral chute for the first-stage concentration, the middlings and the tailings obtained by the first-stage scavenging enter an ore pulp inlet of a spiral chute for the second-stage scavenging, 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 invention has the beneficial effects that: the invention adopts the spiral chutes with different moment-diameter ratios and transverse inclination angles to form a gravity ore dressing process of rough ore dressing, fine ore dressing and sweeping, and the spiral chutes arranged in the selection operation section have larger distance-diameter ratio and transverse inclination angle, larger ore pulp flow velocity and larger centrifugal force, thereby effectively improving the grade of the 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. The invention has the advantages of simple and convenient production operation, low consumption, environmental protection, stable index and the like, can meet the requirement of large-scale chromite ore dressing production, and has superior production index. If the Zimbabwe is used for transforming the table chromite ore dressing plant which treats 50 tons of raw ore per day, 10 spiral chutes related to the invention are used for replacing 50 tables to build the table chromite ore dressing plant which treats 500 tons of raw ore per day, the processing capacity is improved by 10 times, the grade of the chromite concentrate reaches 49.56%, the recovery rate is 90.16%, and the index is obviously improved compared with the original table gravity dressing process.
Drawings
FIG. 1 is a schematic layout of a gravity sorting system.
FIG. 2 is a schematic process flow diagram of the present invention.
FIG. 3 is a schematic illustration of the moment to diameter ratio A of the spiral chute.
Fig. 4 is a schematic diagram of a cross-sectional curve and a transverse inclination angle B of the spiral chute.
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 invention is further illustrated in the following description with reference to 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. 3 and 4, 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; 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, a spiral chute 5 for second-stage sweeping, wherein the ratio of the moment to the diameter A 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 ratio of the moment to the diameter A of the spiral chute 5 for the second-stage sweeping are 0.45, and the transverse inclination angle B is 8.5 degrees.
The sorting system is used for sorting, and as shown in fig. 2, 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 larger than 0.5mm returns to the ball mill for grinding again, the raw ore with the granularity smaller than 0.5mm enters a spiral chute 1 for roughing, the concentrate after roughing enters a first pulp tank 6 through a concentrate discharge port, a pulp pump 10 pumps the pulp in the first pulp tank 6 into a pulp inlet of a spiral chute 2 for roughing, the middlings and tailings after roughing enter a second pulp tank 7 after being discharged from a ore discharge port, and the pulp in the second pulp tank 7 is pumped into an inlet of a spiral chute 4 for sweeping in one section through the 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 a third ore pulp tank 8 and an 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 enter the ore pulp inlet of the first-stage scavenging spiral chute 4 through a second ore pulp tank 7 and the ore pulp pump 10; concentrate obtained by second-stage concentration is used as final concentrate; the middlings obtained by the second-stage concentration enter a third pulp tank 8 and are pumped into the pulp inlet of the spiral chute 3 for the second-stage concentration through a pulp pump 10, and the tailings obtained by the second-stage concentration enter a second pulp tank 7 and are pumped into the pulp inlet of the spiral chute 4 for the first-stage scavenging through the pulp pump 10; the concentrate obtained by the first-stage scavenging enters a first pulp tank 6, is pumped into an ore pulp inlet of a first-stage concentration spiral chute 2 through an ore pulp pump 10, and middlings and tailings obtained by the first-stage scavenging enter a fourth pulp tank 9 and pass through ore pulpThe pump 10 pumps the ore pulp into the ore pulp inlet of the spiral chute 5 for the second-stage scavenging, the concentrate obtained by the second-stage scavenging returns to the 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 concentrate grade of the obtained chromite is 49.71 percent (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%.
According to the technical scheme of the invention, in the concentration operation section, the configured spiral chute has larger distance-diameter ratio and transverse inclination angle, the ore pulp flow velocity is larger, the centrifugal force is larger, and the grade of the concentrate can be effectively improved. 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. 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 (6)
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.
6. A chromite beneficiation process using the gravity separation system of any one of claims 1 to 5, comprising the steps of: the raw ore is crushed in two sections and then enters a ball mill for grinding, then the raw ore is graded, the part with the granularity larger than 0.5mm returns to the ball mill for regrinding, the raw ore with the granularity smaller than 0.5mm enters a spiral chute for roughing, the concentrate after roughing is discharged from a concentrate discharge port of the spiral chute for roughing and then enters an ore pulp inlet of the spiral chute for first section of fine separation, and the middlings and tailings after roughing are discharged and then enter an inlet of the spiral chute for first section of scavenging; the concentrate obtained by the first-stage concentration enters an ore pulp inlet of a spiral chute for the second-stage concentration, the middlings obtained by the first-stage concentration return to a ball mill for regrinding, and the tailings obtained by the first-stage concentration enter the ore pulp inlet of the spiral chute for the first-stage scavenging; concentrate obtained by second-stage concentration is used as final concentrate; the middlings obtained by the second-stage concentration enter an ore pulp inlet of a spiral chute for the second-stage concentration, and the tailings obtained by the second-stage concentration enter an ore pulp inlet of a spiral chute for the first-stage scavenging; the concentrate obtained by the first-stage scavenging enters an ore pulp inlet of a spiral chute for the first-stage concentration, the middlings and the tailings obtained by the first-stage scavenging enter an ore pulp inlet of a spiral chute for the second-stage scavenging, 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.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010403082.XA CN111450990A (en) | 2020-05-13 | 2020-05-13 | Gravity separation system and chromite beneficiation method |
| AU2021102528A AU2021102528A4 (en) | 2020-05-13 | 2021-05-12 | Gravity Concentration System and Chromite Ore Dressing Method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010403082.XA CN111450990A (en) | 2020-05-13 | 2020-05-13 | Gravity separation system and chromite beneficiation method |
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| CN111450990A true CN111450990A (en) | 2020-07-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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