A raw material rod mill for molybdic acid production

Abstract

The present invention relates to the technical field of rod mills, and proposes a raw material rod mill for molybdic acid production, comprising a frame, a drum rotatably arranged on the frame, two ends of the drum respectively being an inlet and an outlet, a screening component arranged in the drum, the screening component dividing the inside of the drum into a grinding cavity and a screening cavity, the screening component comprising an annular block, a conical cylinder and a rod body, the annular block being arranged in the drum, the inner diameter of the annular block being smaller than the inner diameter of the drum, the conical cylinder being arranged on the annular block, the end of the conical cylinder with a smaller diameter facing the outlet, the cylinder wall of the conical cylinder being provided with screening holes, and the rod body rollingly arranged in the grinding cavity of the drum. Through the above technical scheme, the problems of insufficient grinding and easy discharge of coarse materials in the prior art are solved.

Description

Technical Field

[0001] The invention relates to the technical field of rod mills, and in particular to a raw material rod mill for producing molybdic acid. Background Art

[0002] Rod mill is a common ore grinding machine, mainly used for dry or wet fine grinding of materials in the fields of mining, chemical industry, building materials, metallurgy, etc. It uses the rotating cylinder to drive the internal steel rods to rise, fall or roll, and impact and squeeze the materials in the cylinder to achieve a crushing effect.

[0003] In existing rod mills, the feed and discharge ports are directly connected to the cylinder, which results in the material flowing directly from the center area to the discharge port without being fully ground, causing coarse particles to mix into the final product. Therefore, the coarse particles must be frequently returned for re-grinding, which increases the operation cycle and energy consumption and reduces the overall efficiency. Summary of the invention

[0004] The invention provides a raw material rod mill for molybdic acid production, which solves the problem that the rod mill in the prior art easily mixes coarse material particles into the final product.

[0005] The technical solution of the present invention is as follows: A raw material rod mill for molybdic acid production, comprising:

[0006] frame,

[0007] The drum is rotatably arranged on the frame, and the two ends of the drum are respectively an inlet and an outlet.

[0008] A screening component is arranged in the drum, and the screening component divides the interior of the drum into a grinding cavity and a screening cavity. The screening component includes:

[0009] an annular block, arranged in the drum, the inner diameter of the annular block being smaller than the inner diameter of the drum,

[0010] A conical cylinder is arranged on the annular block, the end of the conical cylinder with a smaller diameter faces the outlet, and a screening hole is opened on the cylinder wall of the conical cylinder.

[0011] The rod body is rotatably arranged in the grinding cavity of the drum.

[0012] As a further technical solution, the screening assembly further includes:

[0013] An annular transition connection block is arranged in the grinding cavity, one end of the annular transition connection block is close to one end of the annular block, the inner diameter of the annular transition connection block is smaller than the inner diameter of the annular block, and the annular transition connection block has an arc surface, which smoothly connects the end face of the annular block with the inside of the annular transition connection block.

[0014] As a further technical solution, it also includes:

[0015] A cylindrical liner is arranged in the grinding cavity. The interior of the cylindrical liner is truncated cone-shaped. The end of the cylindrical liner with a smaller diameter is tightly attached to the end of the annular transition connection block. The inner diameters of the ends of the annular transition connection block and the cylindrical liner that are tightly attached to each other are the same.

[0016] As a further technical solution,

[0017] One end of the rod body facing the annular transition connection block has a hemispherical surface, and the diameter of the hemispherical surface is less than or equal to the diameter of the arc surface.

[0018] As a further technical solution, the screening assembly further includes:

[0019] The baffle is arranged at the end of the conical cylinder with a larger diameter. The baffle is provided with a plurality of material holes, some of which are located on one side of the inner wall of the conical cylinder.

[0020] As a further technical solution,

[0021] The weight of one end of the rod body close to the annular transition connection block is greater than the weight of the other end.

[0022] As a further technical solution, there are several screening holes, and the several screening holes are arranged in a spiral shape on the cylinder wall of the conical cylinder to form spiral screening holes. The spiral screening holes enable the conical cylinder to have a deformation space along its axial direction. After the conical cylinder is deformed along the axial direction, the conical cylinder becomes longer or shorter, and the spiral screening holes increase or decrease.

[0023] As a further technical solution, it also includes:

[0024] The telescopic member is arranged on the annular block and acts on the end of the conical cylinder with a smaller diameter. When the telescopic member is extended or contracted, the conical cylinder becomes longer or shorter.

[0025] As a further technical solution,

[0026] The cross section of the spiral screening hole is trapezoidal, and the width of one end of the spiral screening hole close to the inside of the conical cylinder is smaller than that of the other end.

[0027] Also includes,

[0028] A cleaning piece is slidably arranged in the spiral screening hole, and the cleaning piece is used to clean the materials blocked in the spiral screening hole.

[0029] As a further technical solution, the cleaning piece includes:

[0030] The first wheel is located in the conical cylinder.

[0031] The second wheel is located outside the conical cylinder.

[0032] A connecting piece passes through the spiral screening hole, and two ends of the connecting piece are respectively hinged to the first wheel and the second wheel.

[0033] The working principle and beneficial effects of the present invention are:

[0034] In the present invention, a rod body is arranged to roll in the grinding cavity of the drum, and the rod body has a plurality of rod bodies. When the drum rotates, the rod body rolls therein to grind the material. After the ground material reaches the conical cylinder, as the conical cylinder rotates, small particles that meet the requirements are discharged into the screening cavity through the screening holes, and then as the material increases, it is discharged through the outlet. Large particles of material, due to their high weight, will fall into the grinding cavity along the inner inclined surface of the conical cylinder, and can play the grinding role again until they meet the requirements and are discharged through the screening holes. Another key point is that the end of the conical cylinder with a larger diameter is arranged in the drum through an annular block, so that there is a certain distance between the conical cylinder and the inner wall of the grinding cavity. This can help larger materials fall from the conical cylinder into the grinding cavity on the one hand, and can reduce the direct force of the rod body on the conical cylinder on the other hand, reduce the damage to the conical cylinder, and improve the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0036] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0037] Figure 2 It is a right view structural schematic diagram of the present invention;

[0038] Figure 3 For the present invention Figure 2 Schematic diagram of the AA section structure;

[0039] Figure 4 For the present invention Figure 3 Middle D is a schematic diagram of the partially enlarged structure;

[0040] Figure 5 It is a schematic diagram of the rod structure of the present invention;

[0041] Figure 6 The structure of the screening component of the present invention is shown in FIG. Figure 1 ;

[0042] Figure 7The structure of the screening component of the present invention is shown in FIG. Figure 2 ;

[0043] Figure 8 This is a schematic diagram of the main structure of the screening assembly of the present invention;

[0044] Fig. 9 For the present invention Figure 8 Schematic diagram of the BB cross-section structure;

[0045] Fig.10 For the present invention Fig. 9 Middle C is a schematic diagram of a partially enlarged structure;

[0046] In the figure: 1-frame, 2-drum, 21-inlet, 22-outlet, 23-grinding cavity, 24-screening cavity, 3-screening assembly, 31-annular block, 32-conical cylinder, 33-screening hole, 34-annular transition connecting block, 35-baffle, 36-material hole, 341-arc surface, 4-rod body, 41-hemispherical surface, 5-cylindrical liner, 6-telescopic member, 7-cleaning member, 71-first wheel, 72-second wheel, 73-connecting piece, 74-annular groove, 81-into hopper. DETAILED DESCRIPTION

[0047] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0048] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0049] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0051] like Figure 1-10 As shown, the present invention proposes a raw material rod mill for molybdic acid production, comprising: a frame 1, a drum 2 rotatably arranged on the frame 1, two ends of the drum 2 are respectively an inlet 21 and an outlet 22, a screening component 3 is arranged in the drum 2, the screening component 3 divides the inside of the drum 2 into a grinding cavity 23 and a screening cavity 24, the screening component 3 comprises an annular block 31 arranged in the drum 2, the inner diameter of the annular block 31 is smaller than the inner diameter of the drum 2, a conical cylinder 32 is arranged on the annular block 31, the end of the conical cylinder 32 with a smaller diameter faces the outlet 22, a screening hole 33 is opened on the cylinder wall of the conical cylinder 32, and a rod 4 is rollingly arranged in the grinding cavity 23 of the drum 2.

[0052] In this embodiment, Figure 3 and Figure 4 As shown, a rod body 4 is arranged to roll in the grinding cavity 23 of the drum 2, and the rod body 4 has a plurality of rod bodies. When the drum 2 rotates, the rod body 4 rolls therein to grind the material. After the ground material reaches the conical cylinder 32, as the conical cylinder 32 rotates, the small particle material that meets the requirements is discharged into the screening cavity 24 through the screening hole 33, and then discharged through the outlet 22 as the material increases. The large particle material, due to its high weight, will fall into the grinding cavity 23 along the inner inclined surface of the conical cylinder 32, and can play the grinding role again until it meets the requirements and is discharged through the screening hole 33. In addition, the key point is that the end of the conical cylinder 32 with a larger diameter is arranged in the drum 2 through the annular block 31, so that there is a certain distance between the conical cylinder 32 and the inner wall of the grinding cavity 23. This can facilitate the larger material to fall from the conical cylinder 32 into the grinding cavity 23 on the one hand, and reduce the direct force of the rod body 4 on the conical cylinder 32 on the other hand, reduce the damage to the conical cylinder 32, and improve the service life.

[0053] Furthermore, the screening assembly 3 also includes an annular transition connection block 34 arranged in the grinding cavity 23, one end of the annular transition connection block 34 is close to one end of the annular block 31, the inner diameter of the annular transition connection block 34 is smaller than the inner diameter of the annular block 31, and the annular transition connection block 34 has an arc surface 341, which smoothly connects the end surface of the annular block 31 with the interior of the annular transition connection block 34.

[0054] In this embodiment, Figure 4 and Fig. 9 As shown, the annular transition connection block 34 and the annular block 31 are smoothly connected through the arc surface 341, which can prevent large particles of materials falling from the conical cylinder 32 from remaining in the dead corner, so that the grinding is more complete.

[0055] Furthermore, it also includes that the cylindrical liner 5 is arranged in the grinding cavity 23, the interior of the cylindrical liner 5 is a truncated cone, the end of the cylindrical liner 5 with a smaller diameter is tightly attached to the end of the annular transition connection block 34, and the inner diameter of the annular transition connection block 34 and the end of the cylindrical liner 5 that are tightly attached to each other are the same.

[0056] In this embodiment, the provision of the cylindrical lining plate 5 can reduce the impact of the rod body 4 or the material on the drum 2 and increase the service life. In addition, the interior of the cylindrical lining plate 5 is a truncated cone, that is, the surface inside the cylindrical lining plate 5 is inclined, so the rod body 4 has a tendency to move toward the arc surface 341 in the conical cylinder 32, and the rod body 4 can grind the material at the arc surface 341. When one end of the rod body 4 is blocked by the material at the arc surface 341, the rod body 4 will have a certain lateral displacement. After the blocking is completed, due to the effect of the inclined surface, there will be an opposite lateral displacement, which further improves the grinding effect, and has a certain impact effect on the material at the arc surface 341, thereby fully grinding the material.

[0057] Furthermore, one end of the rod body 4 facing the annular transition connection block 34 has a hemispherical surface 41 , and the diameter of the hemispherical surface 41 is less than or equal to the diameter of the arc surface 341 .

[0058] In this embodiment, Figure 4 As shown, the hemispherical surface 41 at the end of the rod body 4 can fully contact the arc surface 341. In addition, the curvature of the hemispherical surface 41 is greater than the curvature of the arc surface 341, which can prevent the existence of unground space when the hemispherical surface 41 completely falls on the arc surface 341.

[0059] Furthermore, the screening assembly 3 also includes a baffle 35 disposed at the end of the conical cylinder 32 with a larger diameter. The baffle 35 has a plurality of material holes 36 , some of which are located on one side of the inner wall of the conical cylinder 32 .

[0060] In this embodiment, Figure 7 As shown, the setting of the baffle 35 can prevent the rod body 4 from entering the conical cylinder 32, reducing the possibility of damage to the conical cylinder 32. In addition, the material hole 36 can allow the material to enter the conical cylinder 32, and can also allow the material to return to the grinding cavity 23 from the conical cylinder 32. A part of the material hole 36 is close to the inner wall of the conical cylinder 32, which can effectively prevent the baffle 35 from blocking large particles.

[0061] Further, if Figure 5As shown, the weight of one end of the rod body 4 close to the annular transition connection block 34 is greater than the weight of the other end. On the one hand, it can fully grind the large particles of material at the arc surface 341, and on the other hand, it can maintain the posture of the rod body 4 in the grinding cavity 23, that is, the end with larger weight faces the arc surface 341.

[0062] Further, if Figure 6 and Fig. 9 As shown, there are a plurality of screening holes 33, which are arranged in a spiral shape on the wall of the conical cylinder 32 to form spiral screening holes. The spiral screening holes allow the conical cylinder 32 to have a deformation space along its axial direction. After the conical cylinder 32 is deformed along the axial direction, the conical cylinder 32 becomes longer or shorter, and the spiral screening holes increase or decrease. The increase or decrease of the spiral screening holes can control the size of the discharged material, thereby obtaining the material of the required size.

[0063] Furthermore, the telescopic member 6 is arranged on the annular block 31, and the telescopic member 6 acts on the end of the conical cylinder 32 with a smaller diameter. After the telescopic member 6 is extended or contracted, the conical cylinder 32 becomes longer or shorter.

[0064] In this embodiment, the telescopic member 6 is an electric cylinder or a pneumatic cylinder.

[0065] Furthermore, the cross-section of the spiral screening hole is trapezoidal, and the width of one end of the spiral screening hole close to the inside of the conical cylinder 32 is smaller than that of the other end. It also includes a cleaning piece 7, which is slidably arranged in the spiral screening hole and is used to clean the material blocked in the spiral screening hole.

[0066] In this embodiment, Fig. 9 and Fig.10 As shown, the cross-section of the spiral screening hole is trapezoidal, and the width of one end close to the conical cylinder 32 is smaller, which can effectively prevent clogging. After the material enters the spiral screening hole, the discharge process space gradually increases, so it can effectively prevent clogging.

[0067] Furthermore, the cleaning member 7 includes a first wheel 71, a second wheel 72 and a connecting piece 73. The first wheel 71 is located inside the conical cylinder 32, and the second wheel 72 is located outside the conical cylinder 32. The connecting piece 73 passes through the spiral screening hole, and both ends of the connecting piece 73 are hinged to the first wheel 71 and the second wheel 72 respectively.

[0068] In this embodiment, Fig. 9 and Fig.10As shown, when the conical cylinder 32 rotates, due to the effect of gravity, the cleaning piece 7 will always be located below the conical cylinder 32 and will move along the spiral screening hole. When the material needs to be ground, the drum 2 rotates to one side, and the cleaning piece 7 is located at the end with a smaller diameter close to the conical cylinder 32. When the spiral screening hole needs to be cleaned, the drum 2 is rotated to the other side, and the cleaning piece 7 will move along the spiral screening hole, and the connecting piece 73 will clean up the material blocking the spiral screening hole.

[0069] Furthermore, the first wheel 71 has an annular groove 74 in the middle, one end of the connecting piece 73 is hingedly arranged in the annular groove 74, the second wheel 72 has a diamond-shaped cross section, and a part of the second wheel 72 extends into the spiral screening hole.

[0070] In this embodiment, Fig. 9 and Fig.10 As shown, the cross-section of the second wheel 72 is diamond-shaped, and a part of it extends into the spiral screening hole. In this way, during the movement of the second wheel 72, there will be a force pushing the blocked material toward the central axis of the conical cylinder 32, so that the blocked material can be better discharged, which is very convenient for cleaning the blocked material. The reason why a part of the second wheel 72 located outside the conical cylinder 32 extends into the spiral screening hole is that it is often difficult for the blocked material to come out from the inside of the conical cylinder 32, so it is easier to push the blocked material back into the conical cylinder 32. A hopper 81 is provided on one side of the drum 2 for adding materials.

[0071] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A raw material rod mill for molybdic acid production, characterized in that: include, Rack (1), The drum (2) is rotatably mounted on the frame (1), and the two ends of the drum (2) are respectively an inlet (21) and an outlet (22). A screening component (3) is arranged in the drum (2), and the screening component (3) divides the interior of the drum (2) into a grinding cavity (23) and a screening cavity (24). The screening component (3) comprises: An annular block (31) is arranged inside the drum (2), and the inner diameter of the annular block (31) is smaller than the inner diameter of the drum (2). A conical cylinder (32) is arranged on the annular block (31), the end of the conical cylinder (32) with a smaller diameter faces the outlet (22), and a sieve hole (33) is provided on the cylinder wall of the conical cylinder (32). The rod body (4) is rotatably disposed in the grinding cavity (23) of the drum (2). There are a plurality of sieve holes (33), and the plurality of sieve holes (33) are arranged in a spiral shape on the cylinder wall of the conical cylinder (32) to form spiral sieve holes. The spiral sieve holes allow the conical cylinder (32) to have a deformation space along its axial direction. After the conical cylinder (32) is deformed along the axial direction, the conical cylinder (32) becomes longer or shorter, and the spiral sieve holes are enlarged or reduced. The telescopic member (6) is arranged on the annular block (31), and the telescopic member (6) acts on the end of the conical cylinder (32) with a smaller diameter. When the telescopic member (6) is extended or contracted, the conical cylinder (32) becomes longer or shorter. The cross section of the spiral screening hole is trapezoidal, and the width of one end of the spiral screening hole close to the inside of the conical cylinder (32) is smaller than that of the other end. Also includes, A cleaning member (7) is slidably disposed in the spiral screening hole, and the cleaning member (7) is used to clean the material blocked in the spiral screening hole. The cleaning member (7) comprises: The first wheel (71) is located in the conical cylinder (32). The second wheel (72) is located outside the conical cylinder (32). A connecting piece (73) passes through the spiral screening hole, and two ends of the connecting piece (73) are respectively hinged to the first wheel (71) and the second wheel (72).

2. A raw material rod mill for molybdic acid production according to claim 1, characterized in that: The screening assembly (3) further comprises: An annular transition connection block (34) is arranged in the grinding cavity (23), one end of the annular transition connection block (34) is in close contact with one end of the annular block (31), the inner diameter of the annular transition connection block (34) is smaller than the inner diameter of the annular block (31), and the annular transition connection block (34) has an arcuate surface (341), and the arcuate surface (341) smoothly connects the end surface of the annular block (31) and the interior of the annular transition connection block (34).

3. A raw material rod mill for molybdic acid production according to claim 2, characterized in that: Also includes, A cylindrical liner (5) is arranged in the grinding cavity (23); the interior of the cylindrical liner (5) is truncated; the end of the cylindrical liner (5) with a smaller diameter is in close contact with the end of the annular transition connection block (34); and the inner diameters of the ends of the annular transition connection block (34) and the cylindrical liner (5) that are in close contact with each other are the same.

4. The raw material rod mill for molybdic acid production according to claim 3, characterized in that: One end of the rod body (4) facing the annular transition connection block (34) has a hemispherical surface (41), and the diameter of the hemispherical surface (41) is less than or equal to the diameter of the arc surface (341).

5. The raw material rod mill for molybdic acid production according to claim 1, characterized in that: The screening assembly (3) further comprises: The baffle (35) is arranged at the end of the conical cylinder (32) with a larger diameter. The baffle (35) has a material hole (36). There are a plurality of material holes (36), and some of the material holes (36) are located on one side of the inner wall of the conical cylinder (32).

6. A raw material rod mill for molybdic acid production according to claim 2, characterized in that: The weight of one end of the rod body (4) close to the annular transition connection block (34) is greater than the weight of the other end.

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