Magnetic attraction lining and double-medium energy-saving ore grinding system

Abstract

The utility model discloses a magnetic suction lining and double-medium energy-saving ore grinding system, which comprises an ore feeding port, an overflow type mill cylinder, a magnetic suction lining, double grinding media, a hollow shaft neck and a reverse spiral blade, the whole magnetic suction lining has magnetism and is tightly attached to the overflow type mill cylinder by means of magnetic force; double grinding media are arranged in the overflow type mill cylinder and are used for grinding minerals; a hollow shaft neck is arranged at one end part of the overflow type mill cylinder body and is used for discharging mineral products; an ore feeding opening is formed in the other end part of the overflow type mill cylinder body and is used for guiding a sand setting product of the hydraulic classification cyclone to enter the overflow type mill cylinder body; reverse spiral blades are arranged on the hollow shaft neck, and the rotating direction of the blades in the ore grinding operation is opposite to the rotating direction of the overflow type mill barrel. Through the multi-layer and multi-link fine design, the whole ore grinding process is more efficient and accurate, and the utilization rate and the production efficiency of mineral resources are greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mineral processing technical field, concretely is a kind of magnetic attraction inner lining and double medium energy-saving grinding system. BACKGROUND

[0002] In the field of mineral processing, the inner lining of the cylinder and the grinding medium are important parts affecting the production capacity of the mill, and in the production of the ore dressing plant, the grinding operation cost accounts for about 30-40% of the total cost, mainly reflected in the energy consumption of the grinding mill and the medium consumption. Therefore, from the importance of production and economic benefits, it has great practical significance to study and improve the grinding method, the material and structure shape of the inner lining of the mill cylinder, the material shape and grading of the grinding medium to reduce the beneficiation cost and ensure the selection index. At present, most magnetite ore dressing plants still use traditional manganese steel lining plate combined with steel medium overflow type ball mill in fine grinding operation, and the combined lining plate is easy to wear, high in energy consumption and medium consumption, which is not conducive to the cost management of the ore dressing plant. Therefore, in view of the deficiencies of the prior art, the present application provides a kind of magnetic attraction inner lining and double medium energy-saving grinding system, which aims to improve the production rate and grinding efficiency of the grinding mill and reduce the grinding operation cost under the condition of ensuring the fineness of the grinding product. SUMMARY

[0003] (I) Technical problem solved

[0004] In view of the deficiencies of the prior art, the present application provides a kind of magnetic attraction inner lining and double medium energy-saving grinding system, which solves the problem that most magnetite ore dressing plants still use traditional manganese steel lining plate combined with steel medium overflow type ball mill in fine grinding operation, and the combined lining plate is easy to wear, high in energy consumption and medium consumption, which is not conducive to the cost management of the ore dressing plant.

[0005] (II) Technical scheme

[0006] To achieve the above purpose, the utility model discloses a kind of magnetic attraction inner lining and double medium energy-saving grinding system, including ore feeding port, overflow type mill cylinder, magnetic attraction inner lining, double grinding medium, hollow shaft neck and anti-spiral blade, the overflow type mill cylinder has a certain camber, the magnetic attraction inner lining is magnetized as a whole, and is closely attached to the overflow type mill cylinder by magnetic force;Double grinding medium is arranged in the overflow type mill cylinder, for the grinding of mineral;The overflow type mill cylinder is provided with hollow shaft neck at one end, for discharging mineral product;The overflow type mill cylinder is provided with ore feeding port at the other end, which is used to guide the sand product of hydrocyclone into the overflow type mill cylinder;Anti-spiral blade is equipped on the above-mentioned hollow shaft neck, and the direction of rotation of these blades in grinding operation is opposite to the direction of rotation of the overflow type mill cylinder.

[0007] Preferably, the magnetic lining is approximately rectangular in front and has a certain arc groove in back, the arc is to tightly fit in the overflow mill cylinder inner wall by magnetic force;

[0008] The groove is further subdivided into multiple equal size areas, and a steel ball with a certain diameter is fixed in the center of each area.

[0009] Preferably, the double grinding medium adopts iron and non-ferrous ball-shaped medium mixing, the iron ball-shaped grinding medium is hot-rolled steel ball, and the non-ferrous ball-shaped grinding medium is alumina ceramic ball.

[0010] Further, the diameter of the overflow mill is 1-1.2 times of the overflow mill with manganese steel lining plate as the mill cylinder protection component and iron ball-shaped medium as the grinding medium, and the length of the overflow mill is the same as the overflow mill with manganese steel lining plate as the mill cylinder protection component and iron ball-shaped medium as the grinding medium.

[0011] Preferably, the reverse spiral blade is to intercept materials with density and particle size not meeting the standard, and then send them back to the overflow mill cylinder along the spiral track for regrinding.

[0012] Preferably, the outlet end of the hollow shaft neck can be equipped with a mine discharge interception net, and the interception effect can be further improved.

[0013] Preferably, the filling rate of the double grinding medium in the overflow mill cylinder is 40-43%, and when the diameter of the iron ball-shaped grinding medium is 30mm, the non-ferrous ball-shaped grinding medium can include three diameters of 30mm, 25mm and 20mm.

[0014] Further, the gradation of the iron ball-shaped grinding medium and the non-ferrous ball-shaped grinding medium is

[0015] The steel ball: the ceramic ball: the ceramic ball: the ceramic ball = 43-48%: 8-13%: 30-35%: 8-13%.

[0016] Further, before the overflow ball mill with the magnetic lining is formally put into production, a certain mass and diameter of steel balls are added therein, the steel balls are magnetically attracted to the surface of the lining, and a grid-shaped protective layer can be formed with the steel balls in multiple same size areas in the groove of the magnetic lining, so as to prevent the grinding medium and the material from directly contacting the surface of the lining plate and causing wear, and meanwhile, the lifting effect of the grinding medium is enhanced.

[0017] (Three) beneficial effects

[0018] The utility model provides a kind of magnetic lining and double medium energy-saving grinding system. It has the following beneficial effects:

[0019] (1) Forming a magnetic grid liner is beneficial to increasing the service life of the liner, enhancing the lifting effect on the grinding media, reducing the downtime of the ball mill when replacing parts, and improving the mill's operating rate and energy transfer efficiency;

[0020] (2) Add a certain amount of iron grinding media, adopt a reasonable media gradation system and filling rate, effectively reduce the gap between media, ensure the effective crushing of minerals, and make up for the lack of fineness of minerals in the second stage of grinding due to the light density of ceramic balls.

[0021] (3) The use of magnetic lining and dual grinding media in combination for grinding reduces the media consumption and energy consumption of the two-stage grinding operation, improves grinding efficiency, and is beneficial to the cost management of magnetite beneficiation plants. Attached Figure Description

[0022] Figure 1 A schematic diagram of a magnetic lining and dual-media energy-saving grinding system;

[0023] In the diagram: 1. Feed inlet, 2. Overflow mill cylinder, 3. Magnetic lining, 4. Dual grinding media, 5. Hollow journal, 6. Reverse spiral blades. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1 This utility model provides a technical solution: a magnetically absorbing liner and dual-media energy-saving grinding system, including a feed inlet 1, an overflow mill cylinder 2, a magnetically absorbing liner 3, dual grinding media 4, a hollow shaft journal 5, and anti-spiral blades 6. The overflow mill cylinder 2 has a certain curvature, and the magnetically absorbing liner 3 is magnetically attached to the overflow mill cylinder 2 by magnetic force. The overflow mill cylinder 2 is equipped with dual grinding media 4 for grinding minerals. A hollow shaft journal 5 is provided at one end of the overflow mill cylinder 2 for discharging mineral products. The other end of the overflow mill cylinder 2 is equipped with a feed inlet 1, which is used to guide the sand products from the hydrocyclone into the overflow mill cylinder 2. Anti-spiral blades 6 are equipped on the hollow shaft journal 5, and these blades rotate in the opposite direction to the rotation direction of the overflow mill cylinder 2 during grinding operations.

[0026] The magnetic liner 3 is a groove with an approximately rectangular front and a certain curvature on the back, which allows it to be tightly attached to the inner wall of the overflow mill cylinder 2 by magnetic force.

[0027] The inside of the groove is further subdivided into multiple equal-sized areas, and a steel ball with a specific diameter is fixed in the center of each area.

[0028] The double grinding medium 4 uses a mixture of ferrous and non-ferrous spherical media, with hot-rolled steel balls as the ferrous spherical grinding medium and alumina ceramic balls as the non-ferrous spherical grinding medium.

[0029] The diameter of the overflow mill is 1-1.2 times that of the overflow mill with manganese steel lining as the mill cylinder protection component and ferrous spherical media as the grinding medium, and the length of the overflow mill is the same as that of the overflow mill with manganese steel lining as the mill cylinder protection component and ferrous spherical media as the grinding medium.

[0030] The counter-helix blade 6 intercepts materials that do not meet the standard in terms of density and particle size, and then sends them back along a helical trajectory to the overflow mill cylinder 2 for regrinding.

[0031] The outlet end of the hollow journal 5 can be equipped with a mine discharge intercepting net, which can further improve the intercepting effect.

[0032] The filling rate of the double grinding medium 4 in the overflow mill cylinder 2 is 40-43%; when the diameter of the ferrous spherical grinding medium is 30mm, the non-ferrous spherical grinding medium can include three diameters of 30mm, 25mm, and 20mm.

[0033] The gradation of the ferrous spherical grinding medium and the non-ferrous spherical grinding medium is

[0034] φ30mm steel ball: φ30mm ceramic ball: φ25mm ceramic ball: φ20mm ceramic ball = 43-48%: 8-13%: 30-35%: 8-13%.

[0035] Before the overflow ball mill with magnetic lining is formally put into production, a certain mass and diameter of steel balls are added to it. The steel balls are magnetically attracted to the surface of the lining, forming a grid-shaped protective layer with the steel balls in the multiple same-size areas inside the magnetic lining groove, preventing direct contact between the grinding medium and the material and the lining surface, causing wear, while enhancing the lifting effect of the grinding medium.

[0036] In the working process of the embodiment, the sand product of the hydrocyclone is introduced into the overflow type mill barrel 2 of the φ4060 ball mill, and the magnetic attraction lining 3 is closely arranged on the barrel 2. Under the action of the double grinding medium 4, the mineral is crushed. The mineral product discharged from the ball mill is discharged through the hollow shaft neck 5, and the counter-helical blade 6 is arranged on the shaft neck. During the grinding process, the rotation direction of the counter-helical blade 6 is opposite to the rotation direction of the mill barrel, so as to ensure that the grinding medium and part of the unqualified particle size material with large density and coarse particle size in the discharged mineral product are blocked back and returned to the mill barrel along the spiral line for regrinding. In addition, the outlet end of the hollow shaft neck 5 is also provided with a discharge interception net to further enhance the interception effect.

[0037] In summary, the magnetic mesh lining is formed, which is beneficial to increase the service life of the lining plate, enhance the lifting effect of the grinding medium, reduce the downtime of the ball mill for replacing parts, improve the operation rate of the mill and the energy transmission efficiency. By adding a certain amount of iron grinding medium, adopting reasonable medium grading system and filling rate, effectively reducing the gap between the media, ensuring the effective crushing of the mineral, and making up for the deficiency of the ceramic ball due to its light density, the magnetic attraction lining is used in cooperation with the double grinding medium for grinding, which reduces the medium consumption and energy consumption of the secondary grinding operation, improves the grinding efficiency, and is beneficial to the cost management of the magnetite beneficiation plant. Through this multi-level and multi-link fine design, the whole grinding process is more efficient and accurate, which greatly improves the utilization rate and production efficiency of mineral resources.

[0038] It should be noted that, in this text, relational terms such as first and second and the like are used merely to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof are intended to cover non-exclusive inclusions, so that a process, method, article, or apparatus including a series of elements includes not only those elements, but also other elements not explicitly listed or inherent to such process, method, article, or apparatus.

[0039] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A magnetically absorbing liner and dual-media energy-saving grinding system, comprising a feed inlet (1), an overflow mill cylinder (2), a magnetically absorbing liner (3), dual grinding media (4), a hollow journal (5), and anti-spiral blades (6), characterized in that: The overflow mill cylinder (2) has a certain curvature, and the magnetic lining (3) is magnetic as a whole, and is tightly attached to the overflow mill cylinder (2) by magnetic force; the overflow mill cylinder (2) is provided with double grinding media (4) for grinding minerals; a hollow journal (5) is provided at one end of the overflow mill cylinder (2) for discharging mineral products; a feed port (1) is provided at the other end of the overflow mill cylinder (2), which is used to guide the sand products of the hydrocyclone into the overflow mill cylinder (2); anti-spiral blades (6) are provided on the hollow journal (5), and these blades rotate in the opposite direction to the rotation direction of the overflow mill cylinder (2) during the grinding operation.

2. The magnetic lining and dual-media energy-saving grinding system according to claim 1, characterized in that: The magnetic liner (3) is a groove with an approximately rectangular front and a certain curvature on the back, which is so as to fit tightly against the inner wall of the overflow mill cylinder (2) by magnetic force. The interior of the tank is further subdivided into multiple equal-sized areas, each with a steel ball of a specific diameter fixed in the center.

3. The magnetic lining and dual-media energy-saving grinding system according to claim 2, characterized in that: The dual grinding media (4) is a mixture of iron and non-iron spherical media. The iron spherical grinding media is hot-rolled steel balls, and the non-iron spherical grinding media is alumina ceramic balls.

4. The magnetic lining and dual-media energy-saving grinding system according to claim 1, characterized in that: The anti-spiral blades (6) intercept materials whose density and particle size do not meet the standards, and then send them back to the overflow mill cylinder (2) along the spiral trajectory for further grinding.

5. The magnetic lining and dual-media energy-saving grinding system according to claim 1, characterized in that: The outlet end of the hollow journal (5) can be equipped with a ore discharge interception net, which can further improve the interception effect.

6. The magnetic lining and dual-media energy-saving grinding system according to claim 3, characterized in that: The filling rate of the dual grinding media (4) in the overflow mill cylinder (2) is 40-43%; when the diameter of the iron spherical grinding media is 30mm, the non-iron spherical grinding media may include three diameters: 30mm, 25mm, and 20mm.

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