Grinding device for preparing low-carbon cement

Abstract

The utility model belongs to the technical field of low-carbon cement preparation, and particularly provides a grinding device for low-carbon cement preparation, which comprises a primary crusher, a vibrating screen, a middle conveying component, a middle stock bin and a grinding component, therefore, the materials can be put into the grinding assembly for further grinding. And the vibrating screen can perform multi-stage screening on the primarily crushed materials to obtain materials with different granularities, and the materials are respectively stored through the middle stock bin. During grinding operation, materials to be ground can be fed according to the sequence of granularity from large to small. According to the utility model, powdery materials which do not need to be ground can be screened out through the vibrating screen, so that the grinding assembly can grind more large-particle-size materials at a time, the adverse effect on buffering and energy absorption of the large-particle-size materials due to the fact that the powdery materials are doped in the large-particle-size materials can be reduced, and the crushing speed of the large-particle-size materials can be increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of cement preparation, and particularly relates to a grinding device for preparing low-carbon cement. Background Art

[0002] Low-carbon cement refers to a new type of cement material that uses industrial solid wastes such as slag, construction waste, and fly ash as raw materials for cement production, thereby reducing the use ratio of limestone to reduce carbon dioxide emissions.

[0003] Low-carbon cement uses industrial solid wastes (such as slag, construction waste, etc.) and limestone as main raw materials. It needs to be ground to obtain a mixture, and then the mixture is put into a decomposition furnace for decomposition. After decomposition, it enters a rotary kiln for calcination to obtain low-carbon cement clinker. In the cement industry, a ball mill is often used to grind the raw materials of low-carbon cement. Since the particle size diameter span of the industrial solid wastes used in the preparation of low-carbon cement is relatively large, it needs to be pre-crushed by a roll crusher or a hammer crusher before entering the ball mill. A small amount of powdery materials with smaller particle sizes will be generated after the raw materials are pre-crushed. It is not necessary to further grind these powdery materials through the ball mill. If these powdery materials are directly added into the ball mill together with the large-particle materials for grinding, on the one hand, it will occupy the internal space of the ball mill, and on the other hand, the powdery materials are mixed between the large-particle materials, which will play a role of buffering energy absorption and lubrication, and will affect the grinding efficiency of the ball mill, resulting in an increase in the grinding time. Summary of the Utility Model

[0004] The utility model provides a grinding device for preparing low-carbon cement, aiming to solve the problem that the powdery materials mixed inside will affect the grinding efficiency of the large-particle materials when grinding the raw materials of low-carbon cement in the prior art.

[0005] To achieve the above object, the technical solution adopted by the utility model is: to provide a grinding device for preparing low-carbon cement, including:

[0006] A primary crusher for crushing materials;

[0007] A vibrating screen is arranged on one side of the primary crusher. The vibrating screen has a first feed inlet with an upward opening and a plurality of first discharge outlets with downward openings;

[0008] An intermediate conveying assembly is arranged between the discharge side of the primary crusher and the first feed inlet for conveying the materials after primary crushing to the vibrating screen;

[0009] An intermediate bin includes a plurality of material storage chambers, and the material storage chambers correspond to the first discharge outlets one by one, and are respectively used for accommodating the materials discharged from the corresponding first discharge outlets; and

[0010] The grinding component is used to ball mill the materials in multiple material containing cavities in the order of decreasing particle size.

[0011] In a possible implementation, the primary crusher includes:

[0012] A box body having a crushing cavity with an open top, and the feeding end of the intermediate conveying component is arranged below the box body;

[0013] A crushing hammer arranged above the box body; and

[0014] A lifting mechanism for driving the crushing hammer to move vertically.

[0015] In a possible implementation, the box body includes:

[0016] A bottom plate arranged horizontally;

[0017] Two side plates respectively connected to both sides of the bottom plate;

[0018] A top material plate arranged between the two side plates, and the top material plate is slidably matched with the bottom plate along the extending direction of the side plates; and

[0019] A sealing plate arranged opposite to the top material plate, and the sealing plate abuts against one side of the bottom plate and the side plates away from the top material plate. The bottom plate, the side plates, the top material plate and the sealing plate jointly enclose the crushing cavity;

[0020] The primary crusher further includes:

[0021] A first telescopic member arranged on one side of the box body for driving the top material plate to move along the extending direction of the side plates; and

[0022] A second telescopic member arranged on one side of the box body for driving the sealing plate to move along the extending direction of the side plates.

[0023] In a possible implementation, the first telescopic member and the second telescopic member are respectively hydraulic telescopic rods.

[0024] In a possible implementation, the powder grinding device for preparing low-carbon cement further includes a feeding component, and the feeding component includes:

[0025] A raw material storage bin; and

[0026] A feeding conveyor arranged between the raw material storage bin and the primary crusher.

[0027] In a possible implementation, the loading conveyor is a plate chain conveyor. One end of the plate chain conveyor is arranged in the silo and forms a first loading end, and the first loading end is inclined in the vertical direction. The other end of the plate chain conveyor forms a first discharging end, and the first discharging end is located above the primary crusher.

[0028] In a possible implementation, a material retaining protrusion is formed on one side of the conveying plate chain of the plate chain conveyor for supporting materials.

[0029] In a possible implementation, the intermediate conveying assembly is a belt conveyor.

[0030] In a possible implementation, the grinding assembly is a ball mill.

[0031] In a possible implementation, a plurality of material transfer assemblies are further arranged between the intermediate silo and the grinding assembly. The material transfer assemblies correspond to the material receiving cavities one by one and are used to convey the materials in the corresponding material receiving cavities to the grinding assembly.

[0032] Compared with the prior art, the beneficial effects of the grinding device for preparing low-carbon cement provided by the present utility model are as follows:

[0033] The grinding device for preparing low-carbon cement provided by the present utility model includes a primary crusher, a vibrating screen, an intermediate conveying assembly, an intermediate silo and a grinding assembly. The primary crusher can initially crush the raw materials of low-carbon cement to make them in a suitable particle size for further grinding in the grinding assembly. The vibrating screen can perform multi-stage screening on the materials after primary crushing to obtain materials with different particle sizes and store them separately through the intermediate silo. When grinding, large-particle-size materials can be first put into the grinding assembly, and after it works for a period of time, smaller-particle-size materials can be put in according to the order from large to small particle size.

[0034] With such an arrangement, on the one hand, the vibrating screen can screen out the powdery materials that do not need to be ground. The powdery materials do not occupy the working space of the grinding assembly, so that the grinding assembly can grind more large-particle-size materials at one time. On the other hand, when the grinding assembly is working, adding materials in order from large to small particle size can reduce the adverse effect of small-particle-size materials mixed in large-particle-size materials on their buffering and energy absorption, which helps to improve the crushing speed of large-particle-size materials and thus improve the grinding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a schematic structural view of the grinding device for preparing low-carbon cement provided by the embodiment of the present utility model Figure 1 ;

[0036] Figure 2Structural schematic of the grinding device for preparing low-carbon cement provided by the embodiment of the present utility model Figure 2 ;

[0037] Figure 3 is Figure 2 a cross-sectional view taken along the A-A direction in

[0038] Figure 4 is Figure 2 a cross-sectional view taken along the B-B direction in

[0039] Explanation of reference numerals:

[0040] 1. Grinding device for preparing low-carbon cement; 10. Primary crusher; 11. Box body; 111. Bottom plate; 112. Side plate; 113. Top material plate; 114. Sealing plate; 12. Crushing hammer; 13. Lifting mechanism; 14. First telescopic member; 15. Second telescopic member; 20. Vibration sieve; 30. Intermediate conveying assembly; 40. Grinding assembly; 50. Feeding assembly; 51. Raw material storage bin; 52. Plate chain conveyor; 521. Material retaining projection. Detailed implementation manners

[0041] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0042] It should be noted that when an element is referred to as being "fixed to", "fixed", "fixedly provided on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to", "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. When an element is referred to as being "provided on", "provided in" another element, it can be directly on the other element or there may also be an intermediate element. "Multiple" means two or more quantities. "At least one" means one or more quantities. "Several" means one or more quantities.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs.

[0044] Please refer to Figures 1 to 4 together, and the grinding device 1 for preparing low-carbon cement provided by the embodiment of the present utility model will be described below.

[0045] Please refer to Figures 1 to 4, an embodiment of the present utility model provides a grinding device 1 for preparing low-carbon cement, which includes a primary crusher 10, a vibrating screen 20, an intermediate conveying assembly 30, an intermediate bin, and a grinding assembly 40. The primary crusher 10 is used to crush materials; the vibrating screen 20 is arranged on one side of the primary crusher 10. The vibrating screen 20 has a first feed port with an upward opening and a first discharge port with a downward opening, and there are multiple first discharge ports; the intermediate conveying assembly 30 is arranged between the discharge side of the primary crusher 10 and the first feed port, and is used to convey the materials after primary crushing to the vibrating screen 20; the intermediate bin includes multiple material storage cavities, and the material storage cavities correspond to the first discharge ports one by one, and are respectively used to accommodate the materials discharged from the corresponding first discharge ports; the grinding assembly 40 is used to ball-mill the materials in the multiple material storage cavities in the order of decreasing particle size.

[0046] Compared with the prior art, the beneficial effects of the grinding device 1 for preparing low-carbon cement provided by the embodiment of the present utility model are:

[0047] The grinding device 1 for preparing low-carbon cement provided by the embodiment of the present utility model includes a primary crusher 10, a vibrating screen 20, an intermediate conveying assembly 30, an intermediate bin, and a grinding assembly 40. The primary crusher 10 can initially crush the raw materials of low-carbon cement to make them in a suitable particle size for further grinding and processing in the grinding assembly 40. The vibrating screen 20 can perform multi-stage screening on the materials after primary crushing to obtain materials with different particle sizes, and store them separately through the intermediate bin. When performing the grinding operation, the materials with large particle sizes can be first put into the grinding assembly 40, and after it works for a period of time, the materials with smaller particle sizes can be put in in the order of decreasing particle size. With such a setting, on the one hand, the powdery materials that do not need to be ground can be screened out by the vibrating screen 20, and the powdery materials will not occupy the working space of the grinding assembly 40, so that the grinding assembly 40 can grind more large-particle-size materials at one time. On the other hand, when the grinding assembly 40 is working, adding materials in the order of decreasing particle size can reduce the adverse effect of small-particle-size materials doping in large-particle-size materials on their buffering and energy absorption, which helps to improve the crushing speed of large-particle-size materials, thereby improving the grinding efficiency.

[0048] In the embodiment of the present utility model, the primary crusher 10 can be an existing hammer crusher, jaw crusher, roll crusher, etc. in the market, which can crush the raw materials for preparing low-carbon cement such as slag, furnace slag, and construction waste, and crush the materials with too large volume into a suitable particle size that can be put into the grinding assembly 40.

[0049] The vibrating screen 20 is used for multi-stage screening of the materials after preliminary crushing, screening out the powdery materials that do not need to be ground, and screening the materials that need to be ground in the order of decreasing particle size, and storing them in the intermediate bin. The vibrating screen 20 can directly select products with appropriate specifications on the market, and there is no limit to its specific model.

[0050] The intermediate conveying component 30 is used to realize the automatic conveying of materials between the primary crusher 10 and the vibrating screen 20. The intermediate conveying component 30 can be any one of a belt conveyor, a screw conveyor or a bucket conveyor, and the user can directly purchase equipment with appropriate specifications on the market.

[0051] The intermediate bin includes a plurality of material storage cavities for storing materials with different particle sizes screened by the vibrating screen 20. The intermediate bin can be arranged on one side of the vibrating screen 20, and a transport vehicle is used to send the materials screened by the vibrating screen 20 into different material storage cavities. The intermediate bin can be a square or cylindrical container. The intermediate bin is not drawn in the figure, and those skilled in the art should understand its structure.

[0052] Please refer to Figure 1 and Figure 3 In some possible embodiments, as shown in FIGS. and, the primary crusher 10 includes a box body 11, a crushing hammer 12 and a lifting mechanism 13. The box body 11 has a crushing cavity with an opening at the top, and the feeding end of the intermediate conveying component 30 is arranged below the box body 11; the crushing hammer 12 is arranged above the box body 11; the lifting mechanism 13 is used to drive the crushing hammer 12 to move vertically.

[0053] In this embodiment, when the primary crusher 10 is working, the raw materials of low-carbon cement are put into the box body 11, and the crushing hammer 12 is lifted to a certain height by the lifting mechanism 13, and then the crushing hammer 12 is allowed to fall. The impact force generated by the falling of the crushing hammer 12 is applied to the materials, so that the materials are crushed. One or more crushing hammers 12 can be provided according to needs. When there are multiple crushing hammers 12, the multiple crushing hammers 12 act simultaneously. The lifting mechanism 13 can be a winch, and the crushing hammer 12 can be driven to rise to a certain height through a steel wire rope. Or, the lifting mechanism 13 can also be a cylinder, an electric telescopic rod, a hydraulic telescopic rod, etc. arranged vertically. Or, the lifting mechanism 13 can also be a cam driven by a motor, and the outer peripheral surface of the cam abuts against the hammer rod of the crushing hammer 12, and the rotation of the cam can drive the crushing hammer 12 to move up and down. Or, the lifting mechanism 13 can also be an eccentric rubber wheel driven by a motor to rotate. When the eccentric rubber wheel rotates, a part of its outer peripheral surface can squeeze the hammer rod, and the friction force between the rubber and the hammer rod can be used to drive the crushing hammer 12 to rise when squeezing. When the eccentric rubber wheel rotates to not contact the hammer rod, the hammer rod freely falls under the action of gravity.

[0054] Please refer to Figure 1 and Figure 3, in some possible embodiments, the box body 11 includes a bottom plate 111, side plates 112, a top feeding plate 113 and a sealing plate 114. The bottom plate 111 is arranged in the horizontal direction; the two side plates 112 are respectively connected to both sides of the bottom plate 111; the top feeding plate 113 is arranged between the two side plates 112, and the top feeding plate 113 is slidably matched with the bottom plate 111 along the extending direction of the side plates 112; the sealing plate 114 is arranged opposite to the top feeding plate 113, and the sealing plate 114 abuts against the side of the bottom plate 111 and the side plates 112 away from the top feeding plate 113. The bottom plate 111, the side plates 112, the top feeding plate 113 and the sealing plate 114 together enclose a crushing cavity. The primary crusher 10 further includes a first telescopic member 14 and a second telescopic member 15. The first telescopic member 14 is arranged on one side of the box body 11 and is used to drive the top feeding plate 113 to move along the extending direction of the side plates 112; the second telescopic member 15 is arranged on the other side of the box body 11 and is used to drive the sealing plate 114 to move along the extending direction of the side plates 112.

[0055] In this embodiment, the bottom plate 111, the two side plates 112, the top feeding plate 113 and the sealing plate 114 enclose a square box body 11, and the top of the box body 11 is open for materials and the crushing hammer 12 to enter. After crushing, the second telescopic member 15 is used to control the sealing plate 114 to move away from the top feeding plate 113, and the first telescopic member 14 is used to control the top feeding plate 113 to push the materials towards the sealing plate 114, so that the materials after preliminary crushing fall onto the intermediate conveying assembly 30 below and are conveyed to the vibrating screen 20 through the intermediate conveying assembly 30.

[0056] Optionally, the first telescopic member 14 and the second telescopic member 15 are respectively one of a hydraulic telescopic rod, an electric telescopic rod or a pneumatic telescopic rod.

[0057] Please refer to Figure 1 and Figure 4 , in some possible embodiments, the grinding device 1 for preparing low-carbon cement further includes a feeding assembly 50. The feeding assembly 50 includes a raw material storage bin 51 and a feeding conveyor. The raw material storage bin 51 is used to store low-carbon cement raw materials, such as slag, gypsum, blast furnace ash, construction waste, etc.; the feeding conveyor is arranged between the raw material storage bin 51 and the primary crusher 10 and is used to convey the raw materials to the primary crusher 10 for preliminary crushing, so as to facilitate subsequent grinding operations in the ball mill.

[0058] The feeding conveyor can be a plate chain conveyor 52, a belt conveyor, a screw conveyor, a bucket elevator, etc. In a specific embodiment, the feeding conveyor adopts a metal plate chain conveyor 52. One end of the plate chain conveyor 52 is arranged in the storage bin and forms a first feeding end. The first feeding end is inclined in the vertical direction. The other end of the plate chain conveyor 52 forms a first discharging end. The first discharging end is located above the primary crusher 10 and can convey the low-carbon cement raw materials in the raw material storage bin 51 into the primary crusher 10.

[0059] Please refer to Figure 2 and Figure 4 , in some possible embodiments, a material retaining protrusion 521 is formed on the side of the conveying plate chain of the plate chain conveyor 52 for supporting the material to prevent the material from slipping. The material retaining protrusion 521 is a strip-shaped or plate-shaped member. The material retaining protrusion 521 can be integrally formed when manufacturing the conveying plate chain, or can be obtained by subsequent methods such as screw fixation and welding. In order to improve the service life, the material retaining protrusion 521 can be made of wear-resistant materials.

[0060] In some possible embodiments, in order to facilitate the feeding of the ball mill, a plurality of material transfer components are further provided between the intermediate storage bin and the grinding component 40. The material transfer components correspond to the material receiving cavities one by one and are used to convey the materials in the corresponding material receiving cavities to the grinding component 40. The material transfer components can be material conveying devices such as belt conveyors and screw conveyors, and there is no limitation on their specific specifications and models.

[0061] It can be understood that the various parts in the above embodiments can be freely combined or deleted to form different combined embodiments. The specific contents of the various combined embodiments will not be elaborated here. After this explanation, it can be considered that the specification of the present utility model has recorded the various combined embodiments and can support different combined embodiments.

[0062] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A grinding device for preparing low carbon cement, characterized in that: include: Primary crusher, used to crush materials; A vibrating screen is arranged at one side of the primary crusher, the vibrating screen has a first feed port opening upward and a first discharge port opening downward, and a plurality of the first discharge ports are provided; An intermediate conveying assembly, disposed between the discharge side of the primary crusher and the first feed port, for conveying the primary crushed material to the vibrating screen; An intermediate silo, comprising a plurality of material containing cavities, each of which corresponds to the first material outlets and is used to contain materials discharged from the corresponding first material outlets; as well as The grinding assembly is used to ball-mill the materials in the plurality of material holding chambers in order of particle size from large to small.

2. The grinding device for preparing low carbon cement according to claim 1, characterized in that: The primary crusher comprises: The box body has a crushing chamber with an opening at the top, and the feeding end of the intermediate conveying assembly is arranged below the box body; A breaker hammer is disposed above the box; and The lifting mechanism is used to drive the breaker to move vertically.

3. The grinding device for preparing low carbon cement according to claim 2, characterized in that: The box body comprises: Base plate, set horizontally; Two side panels, respectively connected to two sides of the bottom panel; A top plate, disposed between the two side plates, the top plate slidingly cooperates with the bottom plate along the extension direction of the side plates; and A sealing plate is arranged opposite to the top material plate, the sealing plate abuts against a side of the bottom plate and the side plate away from the top material plate, and the bottom plate, the side plate, the top material plate and the sealing plate together enclose the crushing chamber; The primary crusher also includes: A first telescopic member, disposed on one side of the box body, for driving the ejector plate to move along the extending direction of the side plate; and The second telescopic member is arranged on one side of the box body and is used to drive the sealing plate to move along the extending direction of the side plate.

4. The grinding device for preparing low carbon cement according to claim 3, characterized in that: The first telescopic member and the second telescopic member are hydraulic telescopic rods respectively.

5. The grinding device for preparing low carbon cement according to claim 1, characterized in that: The grinding device for preparing low-carbon cement further comprises a feeding assembly, which comprises: Raw materials storage silos; and A feeding conveyor is arranged between the raw material storage bin and the primary crusher.

6. The grinding device for preparing low carbon cement according to claim 5, characterized in that: The loading conveyor is a plate chain conveyor, one end of which is arranged in the silo and forms a first loading end, and the first loading end is inclined in the up and down directions. The other end of the plate chain conveyor forms a first discharging end, and the first discharging end is located above the primary crusher.

7. The grinding device for preparing low carbon cement according to claim 6, characterized in that: A material-blocking protrusion is formed on one side of the conveying plate chain of the plate chain conveyor for supporting materials.

8. The grinding device for preparing low carbon cement according to claim 1, characterized in that: The intermediate conveying component is a belt conveyor.

9. The grinding device for preparing low carbon cement according to claim 1, characterized in that: The grinding component is a ball mill.

10. The grinding device for preparing low carbon cement according to claim 1, characterized in that: A plurality of material transfer components are further provided between the intermediate silo and the grinding component. The material transfer components correspond to the material containing cavities one by one and are used for conveying the materials in the corresponding material containing cavities to the grinding component.

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