WO2007000113A1

WO2007000113A1 - A mineral element separating method and an apparatus therefor

Info

Publication number: WO2007000113A1
Application number: PCT/CN2006/001477
Authority: WO
Inventors: Tao Zhou; Mingming Zhou
Original assignee: Tao Zhou; Mingming Zhou
Priority date: 2005-06-29
Filing date: 2006-06-27
Publication date: 2007-01-04
Also published as: CN1714940A; CN101213024A

Abstract

A mineral element separating method includes the following steps: (a) to provide slurries containing mineral element particles; (b) to make said slurries in the step(a) to form an upflow fluid of an adjustable fluid resistance under an external force; (c) to separate the mineral element by adjusting the fluid resistance of the upflow fluid in the step(b) according to the settling velocities of the mineral element particles. In addition, the present invention also provides a sink-float mineral separating apparatus.

Description

Mineral element separation method and equipment thereof

The invention relates to a method for separating mineral elements and an apparatus therefor. Background technique

The slurry flows into the concentrator barrel through a certain tangential line through the slurry inlet, and rotates along the barrel under the action of centrifugal force. The heavy ore particles are thrown by the centrifugal force to the side of the barrel and settle down the wall of the barrel. Light ore particles are pushed up by the rising water stream. This is the working principle of a general centrifugal reselection machine. However, since the centrifugal force and the rising water flow cannot interact and match each other, they can only be used for concentration, de-sludge, and separation of minerals with a large specific gravity. It is difficult to select mineral elements with a specific gravity difference of less than 1.5, and the selection effect is not satisfactory. Mineral elements with a specific gravity difference of 1.25 or less cannot be effectively selected. Summary of the invention

An object of the present invention is to obtain a separation method capable of efficiently separating a mineral element having a small difference in specific gravity. An object of the present invention is to obtain a separation apparatus capable of efficiently separating a mineral element having a small difference in specific gravity.

Still another object of the present invention is to provide a use of the mineral element separation method or apparatus of the present invention. In a first aspect of the invention, there is provided a mineral element separation process comprising the steps of:

(a) providing a slurry containing mineral element particles;

(b) the slurry in step (a) forms an ascending fluid with adjustable fluid resistance under the action of an external force field;

(c) adjusting the fluid resistance of the ascending fluid in the step (b) with respect to the sedimentation velocity of the mineral element particles, so that the mineral elements are separated.

In a preferred embodiment of the invention, the ore is obtained by the following steps:

The granules having a particle size of 1 to 0.01 mm are obtained by pulverizing and/or finely grinding the ore or the industrial waste.

(ii) The granules and water in the step (i) are mixed at a weight ratio of 1: (3 - 30) to obtain a slurry.

In a preferred embodiment of the present invention, in the step (c), the fluid resistance is greater than or less than a sedimentation velocity of the mineral element particles, so that the mineral elements are layered to be separated;

Or the fluid resistance is slightly larger than the sedimentation velocity of a mineral element particle, and the specific gravity is slightly larger than the confirmation Other mineral elements of the mineral element are separated at the lower part to be separated;

Or the fluid resistance is slightly less than the sedimentation velocity of a mineral element particle, and other mineral elements having a specific gravity slightly smaller than the mineral element are separated at the upper portion to be separated. Another aspect of the present invention provides a method for separating mineral elements. When the mineral element is a weak magnetic or non-magnetic mineral, the separation method of the present invention is used for primary enrichment and impurity removal to obtain a separated mineral element. ;

When the mineral element is a medium or strong magnetic mineral, 'magnetic separation is first performed and then depuratized and purified by the method of the present invention described above to obtain a separated mineral element. Still another aspect of the present invention provides a layered beneficiation apparatus, mainly comprising a barrel body, an overflow tank, an electric motor, a rotating shaft, a slurry inlet, an enrichment tank, a discharge pipe, a coal mine, and an inlet/drainage port. Composition,

An upper stabilizing plate is installed above the enrichment tank in the barrel body, so that the mineral particles can be deposited into the bottom of the barrel body to flow into the poly mining area through the enrichment tank;

The lower portion of the enrichment tank is a poly mining area.

In a preferred embodiment of the present invention, the upper portion of the poly-concentrating zone is installed with a moderately stable flow plate along the lower side of the enrichment trough, and a lower steady flow plate is installed above the discharge opening at the bottom of the poly-concentrating area.

In a preferred embodiment of the invention, the motor is a stepless speed regulating motor.

In a preferred embodiment of the invention, the motor is an electromagnetically regulated motor or a variable frequency motor.

In a preferred embodiment of the invention, the impeller on the rotating shaft is a single impeller or a double impeller. In a preferred embodiment of the present invention, one or more beneficiation devices are further connected to the device, and the one or more beneficiation devices are selected from the group consisting of:

(1) a layered beneficiation apparatus of the present invention;

(2) Other applicable layered ore dressing equipment;

(3) Magnetic separation equipment. In still another aspect of the present invention, the mineral element separation method or apparatus of the present invention is provided for separating mineral elements having a specific gravity difference of less than 1.25. DRAWINGS

Figure 1 is a schematic view showing the structure of a separating apparatus of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

The inventors have conducted extensive and intensive research to obtain a good method for separating mineral elements by improving the process, and found that it is particularly excellent for separating mineral elements having a small difference in specific gravity, so it is particularly suitable for the separation of mineral elements. The present invention also provides a separation apparatus for separating a small difference in specific gravity. The present invention has been completed on this basis.

In order to achieve the above object, the technical solution of an embodiment adopted by the present invention to solve the technical problems thereof is as follows: crushing, screening, grinding, classification, first layering machine separation, second layering machine separation. Where "" means: After grinding, after the ore is classified, the ore particles smaller than the classification required particle size enter the next process, and the ore particles larger than the classification requirements are returned to the grinding (for example, grinding on a ball mill); "^" Indicates the next step. Layered ore dressing

The layered beneficiation process of the present invention may be carried out either singly or in combination. For example, for a weakly magnetic or non-magnetic mineral using a layered concentrator manufactured by the beneficiation principle of the present invention, a beneficiation method for performing a re-election process is referred to as a "layering method". For another example, a beneficiation method for a magnetic weight combined process consisting of a magnetic separation machine and a layered concentrator manufactured by the above-described beneficiation principle for medium and strong magnetic minerals, referred to as "magnetic separation method", is an embodiment of the present invention, The following separation method is used:

1. Weak magnetic or non-magnetic minerals First layering machine primary selection enrichment Second layering machine decontamination purification concentrate (product).

The first layering machine is a layering machine of the present invention, and the second layering machine can be either a layering machine of the present invention or a layering machine suitable for use in the art.

2. Magnetic minerals Magnetic separation The first layering machine is selected to remove impurities and concentrates (products). Mineral element

The mineral elements described in the present invention include, but are not limited to, metal mineral elements, solid non-metals. Metallic mineral elements include, but are not limited to: iron, tin, copper.

Sources of the mineral elements of the present invention include weakly magnetic or non-magnetic minerals, medium magnetic or ferromagnetic minerals. It may also be industrial waste, including but not limited to iron-containing industrial wastes such as sulfuric acid slag, phosphoric acid slag and steel slag. The magnetically-containing mineral may be subjected to a magnetic separation treatment and then re-selected and then separated according to the technical scheme of the present invention. Pulp

The ore containing mineral elements or industrial waste is pulverized and/or finely ground for screening to obtain 1

0. 01 awake particles; particles and water mixed to get the ore.

匪。 The particle size of the particles is 0. 03-0. 6匪. The mixing ratio of the particles to water depends on the kind of the mineral element. Preferably, the weight ratio of the particles to water is 1: 3 - 30 , more preferably 1: 15-25. Ascending fluid

In the present invention, the slurry is formed into an ascending fluid whose fluid resistance is adjustable under the action of an external force field. The meaning of "rise" means: The flow of more than one fluid must be directed upwards.

The applied force field is formed by the interaction of mechanical force and rising water flow.

In one embodiment of the invention, the flow rate of the slurry is controlled at the rotational speed of the impeller, and the rotational speed of the impeller is determined based on the selected mineral. The impeller speed is preferably from 5 to 150 rpm, optimally, from 15 to 75 rpm, so that the flow rate of the slurry is suitable for separation, preferably 1. 8 ± 0.5 m/s. At the same time, the inlet flow rate, the bottom water supply flow rate and the bottom discharge flow rate are adjusted, so that the ore body forms a rising fluid with adjustable fluid resistance under the combined action of mechanical force and rising water flow. Preferably, the rotational speed of the impeller is adjusted by means of stepless shifting. Fluid resistance

The fluid resistance of the ascending fluid can be adjusted relative to the sedimentation velocity of the mineral element particles to separate the mineral elements. The sedimentation velocity of the mineral element particles has a specific value depending on the relative density of the elements to be separated.

When the fluid resistance is greater than or less than the sedimentation velocity (elevation threshold) of a certain mineral element particle, the mineral element particle will be separated from other mineral elements in the interference settlement. The water floats to the liquid surface as the rising current flows, flows out in the form of a flowing film in the form of a flowing film, flows out along the overflow tank in the upper part of the barrel body, or sinks to the bottom of the barrel and flows out through the rich tank.

When the rising fluid resistance is slightly larger than the sedimentation velocity of a mineral element particle, the other mineral elements having a specific gravity slightly larger than the mineral element are discharged at the lower portion to be separated. When the rising fluid resistance is slightly less than the sedimentation velocity of a mineral element particle, the other mineral elements having a specific gravity slightly smaller than the mineral element are overflowed at the upper portion to be separated.

If the water resistance formed by the upwelling is only slightly less than the sedimentation velocity of the mineral (the critical point of rise and fall), the element with a specific gravity slightly smaller than the mineral will overflow from the upper part. Otherwise, it is discharged from the lower part.

Therefore, this beneficiation method can effectively separate mineral elements with small difference in specific gravity. Layered concentrator

The layered ore dressing equipment of the invention is characterized by thick water layer beneficiation, combined with the thin water layer and part of the characteristics of the flow film beneficiation, and is integrated into one, and can be continuously produced without interruption. "Thick water layer beneficiation" is relative to "thin water layer beneficiation", and the thickness of the thick water layer is generally common knowledge. For example, the thick water layer has a thickness of 20 mm or more. Similarly, the thickness of a thin layer of water is also a common knowledge. For example, the thickness of the thin water layer is 2-20 mm. It should be noted that the influence of the downward suction generated by the bottom discharge port on the sedimentation of the ore in the slurry has not been noticed in the previous re-election machinery. In order to solve the influence of the suction generated by the bottom discharge port on the sedimentation of the ore in the slurry, the layering machine of the invention is installed on the bottom enrichment tank to force the sediment to settle to the bottom of the barrel to flow into the poly-concentration zone through the enrichment tank. Stabilize the flow board. The upper steady flow plate (the cone at the lower edge of the barrel) can isolate or weaken the interference of the suction generated by the discharge port on the swirling motion of the slurry and accelerate the sedimentation of the ore particles, and force the ore particles to be layered by specific gravity. The relatively dense mineral particles settle to the bottom of the barrel and flow into the poly-concentration area through the enrichment tank.

At the same time, a medium steady flow plate is installed in the poly mining area, and a lower steady flow plate is installed above the discharge port, so that impurities accompanying the sinking of the ore particles into the coal mining area can realize secondary separation under the pressure of water, and further reduce the row. The influence of the suction of the mine mouth on the sedimentation velocity of the ore in the slurry. At the time of separation, the medium/lower steady flow plate makes the second partial separation of the less dense mineral particles mixed in the denser ore with the pulp under the force of the slurry.

Meanwhile, in a preferred embodiment of the present invention, in order to form a rising surge suitable for a certain mineral separation, the length, width and mounting angle of the impeller are determined by a beneficiation experiment. Make sure the impeller is a single impeller or a double impeller.

Meanwhile, in a preferred embodiment of the present invention, the ratio of the diameter of the barrel to the height 1 is determined: (1 - 2).

Thus, the concentrator of the present invention has a wide selection range, and can effectively separate minerals having a specific gravity difference of ± 0.5 or more (for example, a mineral element having a specific gravity difference of ± 1.25 to a specific gravity difference of ± 0.5) can be separated. The element overcomes the shortcomings of traditional separation equipment that can not effectively separate mineral elements with a specific gravity difference of less than ± 1.25, and can effectively treat tailings, waste residue, waste ore, and realize mineral recycling. The beneficiation apparatus of the present invention can be connected to one or more other beneficiation equipment to separate the slurry, for example:

The crushing, grinding, and grading steps may optionally be performed prior to the primary enrichment.

2. Magnetic minerals Magnetic separation equipment The first layering machine is selected for decontamination and purification. Concentrate (product) Before the magnetic separation, the crushing, grinding and grading steps can be carried out first.

The invention will be further elucidated below in conjunction with specific embodiments. It is to be understood that the examples are not intended to limit the scope of the invention. The experimental methods in which the specific conditions are not specified in the following examples are usually carried out according to conventional conditions or according to the conditions recommended by the manufacturer. Proportions and percentages are based on weight unless otherwise stated. Application examples of mineral element separation in mineral processing

1. High sulfur phosphorus magnetite

Brief description of the process:

Raw ore coarse crushing - fine crushing (- 15 let) dry magnetic throwing one grinding (+0. 3ram) one grade (-0. 3 legs) - primary magnetic secondary grinding (+0. 074mm) secondary classification ( - 0. 074 awake) Secondary magnetic separation layering machine (desulfurization) The layering machine selects and purifies ultra-high purity iron concentrate.

Note: A magnetic separation tailings is sent to the tailings recovery machine to recover the primary concentrate and return to the primary grinding. The secondary magnetic separation tailings are sent to the tailings recovery machine to recover the magnetic separation concentrate and return to the secondary grinding. The primary layering machine and the secondary layering machine tailings are recovered by magnetic separation and returned to the layering machine.

for example:

The high-phosphorus magnetite ore produced in the Mianyang region of Sichuan Province contains TFe (the density of Fe ₃ 0 ₄ is 5.18 g/cm ³ ) 25. 8~35. 8%, containing P (the FeP density is 4. 15 g) /cm ³ ) 1. 4~2. 8%. According to the above process, optional TFe70. 08~70·16%, Ρ0. 08~0· 096%, including S^O. 006%, containing As^O. 02% ultra-high purity iron concentrate. The average TFe recovery rate was 80.03%. After the second magnetic separation, after three times of grinding to -0.444 paintings, and then sent to the layering machine for secondary selection, it can be obtained with TFe71 ± 0.5%, containing P 0. 02% ultra-high purity iron concentrate. The TFe recovery rate averaged 78%.

2. High sulfur and high arsenic pyrrhotite

Brief description of the process: Raw ore ■ coarse crushed and fine crushed one time primary grinding (+0.2mm) primary classification (-0.2mm) primary magnetic separation secondary grinding (+0.074 awake) secondary classification (-0.074 leg) secondary magnetic separation ^ one layering machine Desulfurization ■ Secondary layering machine for removing arsenic and pure iron concentrate.

Note: The tailings are recycled with reference to magnetite.

for example:

The original ore in the Ya'an area of Sichuan Province contains TFe (Fe ₂ 0 ₃ density of 5.24 _g / cm ³ ) 35~37%, containing S (its FeS ₂ density is .74 g/cm ³ ) ^0.80%, containing As (its FeAs density) It is 5.83 g/cm ³ , and the difference in density from Fe ₂ 0 ₃ is 0.59 g/cm ³ ) 0.40%, particle size: - 5 mm. According to the above process, TFe65.81~67.15%, containing SO, 052~0·1%, containing AS0.06~0·08% iron concentrate. The TFe recovery rate averages 75 to 76%.

3. High sulfur bismuth phosphorus hematite (weak magnetic)

Brief description of the process - raw ore fine crushing (-10 let) - strong magnetic dry magnetic tailing - secondary grinding o (+0.3 leg) primary classification (-0.3 mm) primary layering machine primary selection secondary grinding +0.1 awake) Secondary grading (-0.1 leg) ^ Secondary stratification machine selects three grindings (- 0.061 let) Water flow cyclone grading, divided into +0.037 let and - 0.037 legs two grades are sent to two The layering machine is selected and the resulting concentrate is combined into the final product iron concentrate.

for example:

Hematite in Mianyang, Sichuan Province contains TFe 33~35%, including P 0.8%. According to the above process, an iron concentrate containing 62% of TFe6 and containing P0.12~0.14% may be selected. The TFe recovery rate averaged 60.46%.

4. Sulfur-containing phosphorus-containing limonite

Brief description of the process:

Raw ore " coarse crushed - fine crushed - secondary grinding 0 (+0.3mm) - secondary classification (-0.3匪) - secondary layering machine primary selection secondary grinding (+0.074mm) secondary classification (- 0.074 wake up) twice The layering machine is re-selected. The hydrocyclone is classified into two grades of +0.037mm and -0.037mm and sent to the two layerers. The selected concentrates are combined into the final product iron concentrate.

For example - in the Liangshan Prefecture of Sichuan Province, the ore contains TFe44~46%, containing S 0.5%, including P 0.62%. According to the above process, iron concentrate containing TFe57.05~57.16%, containing SO.14% and containing P0.23% can be selected. The TFe recovery rate is 62.25% on average.

5. Sulfuric acid slag (pyrite slag)

Process flow brief - Raw slag (-0. 5mm) ^ - Secondary grinding (+0. 15mm) Primary grading (-0. 15mm) - Secondary magnetic separation secondary grinding (+0. 074mm) Secondary grading (-0. 074mm) The secondary magnetic separation primary layering machine removes the secondary layering machine to purify the high-purity iron concentrate.

Note: The tailings are recovered by the magnetic separator for the iron calibrator for the cement plant. The final tailings are made of non-burning and wear-resistant floor tiles.

In the Deyang area of Sichuan, the original slag contains TFe42. 83%, containing SO. 7~1. 0%, containing AS0. 1~0. 12%, particle size - 0. 5 let. According to the above process, TFe66. 5~67. 5%, containing SO. 044^0. 095%, including AS0. 02 . 06°/. Iron concentrate containing TFe45~49°/. Cement iron calibrator. The total recovery of TFe is 86. 39~89. 50%. 4%。 The iron concentrate calibrating agent TFe recovery rate of 35. 02~38. 14%.

6. Vanadium-titanium magnetite tailings

Brief description of the process:

Tailings (-0. 4 let) layering machine primary tailing grinding (+0. 1mm) classification (- 0. 1 wake up) - magnetic separation layering machine desulfurization layering machine selection.

Note: After the magnetic separation tailings are sorted by the layering machine, the primary ore particles (-0.11 leg~+0. 044 let) the grain size are selected by the middle magnetic separation, and then sent to the layering machine for re-election, then the coarse concentrate is selected. Pangang's existing process selects titanium concentrate.

for example:

The Panxi area of Sichuan Province has the final tailings after magnetic separation, re-election, chemical selection and electrification to take iron and recover sulphur-cobalt concentrate. The content of tailings elements is different in Panzhihua Iron and Steel, Heavy Steel and Weigang. This refers to the final tailings thrown away by the Panzhihua Iron and Minerals Concentrator. Containing TFel3~14%, Ti0 ₂ 9. 5~10. 0%, V0. 1%. 85%。 The iron concentrate containing TFe 55~57%, the TFe recovery rate of 42~46. 85%. Such as a magnetic separation and then grinding to - 0. 061mm sent to the layering machine desulfurization selection can be obtained with TFe58~60% iron concentrate, TFe recovery rate of 39~44%. The coarse concentrate is further composed of TFe40. 60%, Si0 ₂ 36. 89%. The titanium recovery was 41%.

7. Multi-element associated iron ore (weak magnetic) tailings

Brief description of the process:

Tailings (grain size -0. 15匪) Layering machine primary selection Grinding <= (+0. 074mm) classification (-0. 074 waking) Layering machine re-selection Layering machine desulfurization and phosphorus removal Layered selection.

Note: The layering machine is selected from the tailings and re-selected by the layering machine to obtain the brick clay. The clay is recovered as the total amount of tailings.

30%

for example: PT/CN2006/001477 Nanjing, Jiangsu Province, tailings containing TFe21. 59~22. 23%, containing SO. 92~1. 02%, including P0. 89~0, 98%. The tailings TFe combination: Fe ₃ 0 ₄ 0. 42~0· 46%, FeC0 ₃ 9. 98~10. 84%, FeS ₂ 0. 89~1. 09%, FeSi0 ₃ 0. 96~1. 12% , Fe ₂ 0 ₃ 8. 7Γ 9. 05%, particle size - 0·15mm. According to the above process, the iron concentrate containing TFe6 is 62%, containing SO. 37~0. 5%, containing P0. 12~0. 14%. The TFe recovery rate was 28.7%.

8. Pyrite tailings (non-metal beneficiation)

Brief description of the process - tailings (granularity - 5 legs) sanding machine crushing (-0. 5 legs) ^ layering machine primary selection ^ grinding (+0. 06 Sa) classification (-0. 06 let) layering The machine is re-selected with a periodic high gradient magnetic separator. _0. 5 awake The primary tailings are selected by a layering machine.

for example:

In the Yibin and Yinzhou regions of Sichuan Province, the pyrite tailings contain Si0 ₂ 33. 72~35. 81%, AI ₂ 0 ₃ 30. 36^31. 82%, Fe ₂ 0 ₃ 6. 14~ 6. 40%, S5~6%, Ti0 ₂ 3. 84~4. 84%, LOOS (burning vector) 15. 72~: L6. 21%, grain size - 5 legs. According to the above process -0. 06mm grain size of the tailings hierarchical machine available reselection containing _{Si0 2 42 ~ 43%, ΑΙ} 2 0 3 35 · 05 ~ 35, 47%, Fe 2 0 3 1. 80~ 1· 96%, S1. 0~1. 10%, Ti0 ₂ 0. 96% , L00S (burning vector) 15. 24% of the primary concentrate can be obtained by magnetic separation, containing Si0 ₂ 45~46%, ΑΙ ₂ 0 ₃ 36~37· 5%, Fe ₂ 0 ₃ 0. 8~1. 0%, SO. 6~0. 8%, Ti0 ₂ 0. 4~0. 66% of final concentrate kaolin (porcelain clay) . The mine consumption is 2. 5: 1. -0. 5 Sweeping grade primary tailings are re-selected by two layering machines, and selected sulfur concentrate containing S 2T 32%. The mine consumption is 20:1.

9. Polymetallic symbiotic ore tailings 1

Brief description of the process:

Tailings (0. 2 legs) - secondary magnetic separation - secondary grinding (+0. 088mm) classification (-0. 088mm) secondary magnetic separation secondary grinding = ( +0. 044mm) classification (-0. 044匪) Layered primary layering machine selection

Note: Two magnetic separation tailings were separately fed into two layering machines for primary selection, and the primary concentrate and medium ore were separately sorted into two layering machines. Available in non-ferrous metal minerals.

for example:

The tailings of the old city of Gejiu, Yunnan Province, containing TFe45~51%, containing SO. 84~1. 24%, including AS0. 54^0. 62%, containing SnO. 15~0· 25% 5%。 Containing ΖηΟ. 7~1%, containing Pb2~2. 5%, containing CuO. 2~0. 5%. According to the above process, TFe64 ~66%, including SO. 06~0. 15%, including AS0. 06^0. 08%, containing Sn, Cu, Zn, Pb are less than 0.1% ο TFe recovery rate 70. 59~73. 33%. Non-ferrous metal concentrate after sorting Can return to the local concentrator.

10. Polymetallic symbiotic ore tailings 2

Brief description of the process:

Tailings (particle size -0.5 let) layering machine primary selection strong magnetic separation grinding (+0.15mm) classification (-0.15mm) layering machine re-selection grinding (+0.074mm) classification (-0.074mm) layering machine Desulfurization ■ layering machine purification

Note: The strong magnetic tailings are selected by the layering machine and then selected into the layering machine to obtain copper coarse concentrate and return to the local concentrator.

for example:

The tin ore flotation tailings in the Gejiu area of Yunnan contain TFel6~26%, containing CuO.25~0.7%, containing SO.74%, and containing ASO.42%. According to the above procedure, an iron concentrate containing 60% to 62% of TFe, containing SO.24 to 0.3%, containing 0.08 to 0.12% of AS, and containing CuO.08% can be obtained. The TFe recovery rate is 38.75~47.69%, and the copper recovery rate is 44.29~60%.

11. Polymetallic symbiotic ore tailings 3

Brief description of the process - tailings (particle size -0.1mm) layering machine primary selection ^ layering machine re-election grinding ^ (+0.044 awake) classification (-0.044mm) ^ layering machine selection.

for example:

The copper tailings in a certain place contain TFe8.44%, containing MoO.24%, NiO.019%, and particle size - 0. lmm. According to the above procedure, molybdenum coarse concentrate containing Mo 2.84 ~ 3.92% can be obtained. Molybdenum recovery rate is 50~60%.

12. False hematite

Brief description of the process - raw ore coarse crushing - secondary grinding (+0.2 legs) classification (-0.2mm) medium strong magnetic separation ^ secondary grinding (+0.074 awake) classification (-0.074mm) desulfurization and dephosphorization The layerer is purified.

for example:

In the Liangshan Prefecture of Sichuan Province, the ore contains TFe 48~50%, containing SO.5%, including P0.8%. According to the above process, iron concentrate containing TFe 60~62%, containing S0.21% and containing P0.15% can be obtained. TFe recovery rate 69.44^70.60% Example of mineral element separation equipment

As shown in Fig. 1, the barrel 1 is made of steel plate, and the upper side of the barrel 1 is equipped with a channel bracket, and the barrel is 1 The upper part is surrounded by a ring of overflow trough 2, which is connected to the upper edge of the bracket and the barrel 1 by means of splicing. A bucket cover is mounted above the overflow tank 2, a vertical variable frequency motor 3 is mounted above, and a coupling is coupled to the motor shaft and the rotating shaft 4 below. The lower end of the rotating shaft 4 is mounted in a bearing case at the bottom of the barrel. An impeller 6 of four blades is mounted at the 1/3 of the barrel below the feed port 5. Install the slurry inlet port 5 (with external valve) along the 1/3 barrel below the overflow tank 2. An enrichment tank 8 is opened in each of the four directions (for example, evenly distributed) on the steel plate at the bottom of the barrel. Of course, it is also possible to provide four or more enrichment tanks. Above the enrichment tank 8, an upper flow plate 7 (welded by steel plates) having a length and a width larger than that of the enrichment tank 8 is attached. The lower part of the enrichment tank 8 is a poly-concentration zone, and a middle steady flow plate 12 is installed obliquely along the enrichment trough 8 in the upper part of the poly-concentration zone. A total of four medium-stabilized flow plates 12 made of steel plates are installed in the four enrichment tanks. Above the discharge opening at the bottom of the poly mining area, a circular lower steady flow plate 11 is mounted. The diameter of the lower steady flow plate 11 is larger than the diameter of the discharge port. The upper part of the cone of the mining area is equipped with inlet and outlet ports 10 (can be connected to the valve). Below the discharge port at the bottom of the cone, there are welded steel pipes connected, and a valve 9 is installed to facilitate the outflow of the slurry. The mineral processing ability is strong, and the mineral elements having a specific gravity difference of ±0.5 or more can be effectively separated.

All documents mentioned in the present application are hereby incorporated by reference in their entirety in their entireties in the the the the the the the the the In addition, it should be understood that various modifications and changes may be made by those skilled in the art in the form of the present invention.

Claims

Rights request

1. A method for separating mineral elements, which is characterized by the following steps:

(a) providing a slurry containing mineral element particles;

2. The method of claim 1 wherein: said slurry is obtained by the following steps -

(i i) The granules and water in the step (i) are mixed at a weight ratio of 1: (3 - 30) to obtain a slurry.

3. The method according to claim 1, wherein: in the step (c),

The fluid resistance is greater than or less than a sedimentation velocity of the mineral element particles, such that the mineral elements are layered to be separated;

Or the fluid resistance is slightly larger than the sedimentation velocity of a mineral element particle, and the other mineral element having a specific gravity slightly larger than the mineral element is discharged at the lower portion to be separated;

Or the fluid resistance is slightly less than the sedimentation velocity of a mineral element particle, and the other mineral element having a slightly smaller specific gravity than the mineral element is separated at the upper portion to be separated.

4. A method for separating mineral elements, characterized in that

When the mineral element is a weakly magnetic or non-magnetic mineral, the primary enrichment and impurity purification are carried out by the method of claim 1 to obtain a separated mineral element;

When the mineral element is a medium or strong magnetic mineral, magnetic separation is first performed and then depuratization and purification are carried out by the method according to claim 1, thereby obtaining a separated mineral element.

5. A layered ore dressing equipment, which is mainly composed of a barrel body, an overflow tank, a motor, a rotating shaft, a slurry inlet port, an enrichment tank, a discharge pipe valve, a coal mining area and an inlet/drainage port, and is characterized by:

An upper steady flow plate is installed above the enrichment tank in the barrel body, so that the mineral particles can be deposited into the bottom of the barrel body to flow into the poly-concentration area through the enrichment tank;

The lower portion of the enrichment tank is a poly mining area.

6. The apparatus according to claim 5, wherein the upper portion of the poly-concentrating zone is installed with a medium-stabilizing flow plate obliquely along the lower edge of the enrichment trough, and the lower steady-state flow plate is installed above the discharge opening at the bottom of the poly-concentrating area.

7. The apparatus according to claim 5, wherein the motor is a motor that performs stepless speed regulation.

8. Apparatus according to claim 5 wherein the impeller on said rotating shaft is a single impeller or a double impeller.

9. Apparatus according to claim 5 wherein said apparatus is further coupled to one or more beneficiation apparatus, said one or more beneficiation apparatus being selected from the group consisting of:

(1) The layered beneficiation apparatus of claim 5;

(2) Other applicable layered ore dressing equipment;

(3) Magnetic separation equipment.

10. A mineral element separation process according to claim 1 or an apparatus according to claim 5 for separating mineral elements having a specific gravity difference of less than 1.25.