Coal gangue treatment system and treatment method

Abstract

The application discloses a coal gangue treatment system and a treatment method. The coal gangue treatment system comprises a crushing assembly, a screening assembly and an air jigging assembly. The crushing assembly is used for crushing coal gangue. One end of the screening assembly is connected with one end of the crushing assembly, so that the crushed coal gangue flows into the screening assembly. The screening assembly is used for screening the crushed coal gangue into coarse particles, fine particles and target particles according to particle size. The other end of the screening assembly is connected with the other end of the crushing assembly, so that the coarse particles screened by the screening assembly flow into the crushing assembly. The air jigging assembly is communicated with the screening assembly, so that the target particles flowing out of the screening assembly flow into the air jigging assembly. The air jigging assembly is used for sorting according to the density of the target particles. The air jigging assembly is communicated with the crushing assembly, so that the light material flowing out of the air jigging assembly flows into the crushing assembly. The coal gangue treatment system has the advantages of high treatment efficiency and low cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of comprehensive utilization of coal gangue, in particular to a coal gangue treatment system and a treatment method. BACKGROUND

[0002] Due to different production places and production ways, coal gangues have certain differences in mineral components, resulting in different physical and chemical properties such as mechanical strength and density of the coal gangues, which provides a basis for grading and quality classification of the coal gangues. Grading and quality classification of the coal gangues are beneficial to application of the coal gangues in energy, building materials, chemical industry, new materials, agriculture and other fields, so as to realize energy, resource and material utilization of the coal gangues and achieve good economic, social and environmental benefits, and provide important resource guarantee for sustainable development of China.

[0003] Grading of the coal gangues is based on that different minerals in the coal gangues are respectively assigned to certain particle size grades after crushing, and the coal gangues can be divided into particle size grades with different mineral compositions and properties by using a screening method, so as to realize grading of the coal gangues.

[0004] In the related art, particle size sorting and density sorting of the coal gangues are often carried out separately, and the two sorting processes are not fused according to target products and the sorting path is single, and the processing process has insufficient circulation amount. SUMMARY

[0005] The present application aims to at least solve one of the technical problems in the related art to some extent.

[0006] To this end, an embodiment of the present application provides a coal gangue treatment system with low treatment cost and high treatment efficiency.

[0007] An embodiment of the present application provides a coal gangue treatment method with simple steps and high treatment efficiency.

[0008] The coal gangue processing system according to the embodiment of the present application comprises: a crushing assembly for crushing coal gangue; a screening assembly, one end of which is connected to one end of the crushing assembly so that the coal gangue crushed by the crushing assembly flows into the screening assembly, the screening assembly being used for screening the crushed coal gangue according to particle size to divide the coal gangue into coarse particles, fine particles and target particles, the other end of the screening assembly being connected to the other end of the crushing assembly so that the coarse particles screened by the screening assembly flow into the crushing assembly to crush the coarse particles; and an air jigging assembly, which is in communication with the screening assembly so that the target particles flowing out of the screening assembly flow into the air jigging assembly, the air jigging assembly being used for separating the target particles according to density to separate the target particles into heavy materials and light materials, the air jigging assembly being in communication with the crushing assembly so that the light materials flowing out of the air jigging assembly flow into the crushing assembly to crush the light materials.

[0009] The coal gangue processing system according to the embodiment of the present application sets the crushing assembly, the screening assembly and the air jigging assembly, organically combines particle size separation and density separation, realizes the process of cyclic processing of particle size separation and density separation, and improves the processing efficiency of coal gangue.

[0010] In some embodiments, the particle size of the coarse particles is greater than 5 mm, the particle size of the fine particles is less than 3 mm, and the particle size of the target particles is greater than or equal to 3 mm and less than or equal to 5 mm.

[0011] In some embodiments, the coal gangue processing system further comprises a burning assembly, which is in communication with the screening assembly so that the fine particles flowing out of the screening assembly flow into the burning assembly to burn the fine materials as sintering raw materials in the burning assembly.

[0012] In some embodiments, the coal gangue processing system further comprises a sand making machine, which is in communication with the air jigging assembly so that the heavy materials flowing out of the sand making machine flow into the sand making machine to crush the heavy materials into machine-made sand.

[0013] In some embodiments, the crushing assembly can be any one of a pair-roller crusher, an impact crusher, a ring-hammer crusher, an impact crusher and the like.

[0014] In some embodiments, the screening assembly can be a roller screen or a vibrating screen.

[0015] In some embodiments, the screening assembly is located upstream of the crushing assembly and the air jigging system, and the coal gangue treatment system further comprises a hoist, two ends of the hoist being in communication with the crushing assembly and the screening assembly respectively, so that the hoist transports the crushed coal gangue from the crushing assembly to the screening assembly.

[0016] In some embodiments, the coal gangue treatment system further comprises a transportation assembly, the transportation assembly being connected with the crushing assembly, so as to transport the coal gangue to the crushing assembly.

[0017] In some embodiments, the transportation assembly can be a belt conveyor, a roller conveyor or a transport vehicle.

[0018] The coal gangue treatment method according to the embodiment of the present application comprises: S1, crushing coal gangue by using a crusher; S2, screening the crushed coal gangue by using a screening machine, the material with a particle size greater than 5 mm flowing into the crusher for re-crushing, and the material with a particle size less than 3 mm being used as sintering raw material; and S3, performing density separation on the material with a particle size greater than 3 mm and less than 5 mm by using an air jigging system, the material with small density flowing into the crusher for re-crushing, and the material with large density being used as machine-made sand raw material. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 is a flow chart of the coal gangue treatment system according to the embodiment of the present application.

[0020] Fig. 2 is a structural schematic diagram of the coal gangue treatment system according to the embodiment of the present application.

[0021] The coal gangue treatment system 100;

[0022] The crushing assembly 1; the screening assembly 2; the air jigging assembly 3; the incineration assembly 4; the hoist 5; the sand making machine 6; the transportation assembly 7; the crusher 8. DETAILED DESCRIPTION

[0023] The embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0024] The coal gangue treatment system 100 according to the embodiment of the present application is described below with reference to the accompanying drawings.

[0025] As Figs. 1-2 shown, the coal gangue treatment system 100 according to the embodiment of the present application comprises a crushing assembly 1, a screening assembly 2 and an air jigging assembly 3.

[0026] The crushing assembly 1 is used for crushing coal gangue. Specifically, the crushing assembly 1 has a crushing cavity, an inlet and an outlet, both of which are communicated with the crushing cavity, and the coal gangue flows into the crushing assembly 1 through the inlet and flows out from the outlet after being crushed into small particles in the crushing assembly 1.

[0027] One end of the screening assembly 2 is connected with one end of the crushing assembly 1, so that the coal gangue crushed by the crushing assembly 1 flows into the screening assembly 2, and the screening assembly 2 is used for screening the crushed coal gangue into coarse particles, fine particles and target particles according to the particle size, and the other end of the screening assembly 2 is connected with the other end of the crushing assembly 1, so that the coarse particles screened by the screening assembly 2 flow into the crushing assembly 1 to crush the coarse particles. Specifically, as shown in Figs. 1-2 the inlet of the screening assembly 2 is communicated with the outlet of the crushing assembly 1, so that the crushed coal gangue flows into the screening assembly 2, and the screening assembly 2 screens the crushed coal gangue into coarse particles, fine particles and target particles according to the particle size of the particles, and the outlet of the screening assembly 2 is communicated with the inlet of the crushing assembly 1, so that the coarse particles screened by the screening assembly 2 flow into the crushing assembly 1 to be crushed again, the fine particles can be recycled as sintering raw materials, and the target particles enter the next process.

[0028] The air jigging assembly 3 is communicated with the screening assembly 2, so that the target particles flowing out of the screening assembly 2 flow into the air jigging assembly 3, and the air jigging assembly 3 is used for sorting the target particles according to the density to separate the target particles into heavy materials with large density and light materials with small density, and the air jigging assembly 3 is communicated with the crushing assembly 1, so that the light materials flowing out of the air jigging assembly 3 flow into the crushing assembly 1 to crush the light materials. Specifically, as shown in Figs. 1-2 the air jigging assembly 3 is an air jigging system, the inlet of the air jigging assembly 3 is communicated with the outlet of the screening assembly 2, so that the target particles flow into the air jigging assembly 3, and the air jigging assembly 3 classifies the target particles according to the density and separates them into heavy materials and light materials, and the outlet of the air jigging assembly 3 is communicated with the inlet of the crushing assembly 1, so that the light materials flow into the crushing assembly 1 to be crushed again.

[0029] The coal gangue processing system 100 of the embodiment of the present application sets the crushing assembly 1, the screening assembly 2 and the air jigging assembly 3, organically combines the particle size sorting and the density sorting, combines the two sorting processes according to the target product, diversifies the sorting path, and has sufficient circulation amount in the processing process, thereby improving the coal gangue processing efficiency.

[0030] In some embodiments, the coal gangue processing system 100 further includes a incineration assembly 4, which is communicated with the screening assembly 2, so that the fine particles flowing out of the screening assembly 2 flow into the incineration assembly to burn the fine materials as sintering raw materials in the incineration assembly. Specifically, as shown in Figs. 1-2As shown, the incineration assembly 4 can be an incinerator, and the inlet of the incineration assembly 4 is communicated with the outlet of the screening assembly 2, and the screened fine particles flow into the incineration assembly 4 to be incinerated in the incineration assembly 4, thereby improving the utilization rate of coal gangue.

[0031] Since the heavy material has the advantages of large density, high strength, and suitable particle size of the machine-made sand product recovery, in some embodiments, the coal gangue treatment system 100 further comprises a sand making machine 6, which is communicated with the air jigging assembly 3, so that the heavy material flowing out of the sand making machine 6 flows into the sand making machine 6 to crush the heavy material into machine-made sand. Specifically, as shown in Figs. 1-2 As shown, the inlet of the sand making machine 6 is communicated with the outlet of the air jigging assembly 3, and the heavy material separated by the air jigging assembly 3 flows into the sand making machine 6 to change the heavy material into machine-made sand by the sand making machine 6.

[0032] In some embodiments, the crushing assembly 1 can be any one of a pair of roller crushers, impact crushers, ring hammer crushers, impact crushers, etc. Thus, the crushing assembly 1 can be selected according to the actual situation, and the crushing assembly 1 is preferably an impact crusher.

[0033] It is worth noting that the further fine crushing of coal gangue can use a vertical mill, a rod mill, a ball mill, a single-sided cage type crusher, a double-sided cage type crusher, a column mill, etc. Generally speaking, the finer the crushing particle size, the more expensive the equipment. In actual production, a reasonable crushing equipment is selected according to the particle size requirement of the utilization approach of coal gangue, combined with the characteristics of coal gangue and the technical performance of the equipment.

[0034] In some embodiments, the vibrating screen has good treatment effect on relatively dry and loose materials, and the roller screen has the advantages of small footprint, low noise, not easy to block, high screening efficiency, etc. Therefore, in some embodiments, the screening assembly 2 can be a roller screen or a vibrating screen. Thus, the screening assembly 2 can be selected according to the actual situation, for example, when a screening assembly 2 with small footprint is needed, a roller screen can be selected, and when a screening assembly 2 with good screening effect is needed, a vibrating screen can be selected, so that the screening assembly 2 is more reasonably arranged.

[0035] In some embodiments, the screening assembly 2 is located upstream of the crushing assembly 1 and the air jigging assembly 3, and the coal gangue treatment system 100 further comprises an elevator 5, both ends of which are communicated with the crushing assembly 1 and the screening assembly 2, respectively, so that the elevator 5 transports the crushed coal gangue of the crushing assembly 1 to the screening assembly 2.

[0036] Specifically, as shown in Figs. 1-2As shown, the crushing assembly 1 is located above the screening assembly 2, and the inlet of the elevator 5 can be communicated with the outlet of the crushing assembly 1, and the outlet of the elevator 5 can be communicated with the inlet of the screening assembly 2, so that the crushed coal gangue in the crushing assembly 1 is transported into the screening assembly 2 through the elevator 5, and the coarse particles and the target particles after screening flow into the crushing assembly 1 and the air jigging system according to their own gravity, so that the transportation assembly does not need to be added for transportation, and the processing manufacturing cost of the coal gangue processing system 100 is reduced.

[0037] In some embodiments, the coal gangue processing system 100 further comprises a transportation assembly (not shown in the figure) connected with the crushing assembly 1, so as to transport the coal gangue to the crushing assembly 1. Thus, the coal gangue is transported to the vicinity of or into the crushing assembly 1 through the transportation assembly.

[0038] In some embodiments, the transportation assembly 7 can be a belt conveyor, a roller conveyor or a transport vehicle. Thus, different transportation assemblies 7 are selected according to actual conditions, so that the coal gangue processing method is more reasonable, and the coal gangue is transported into the crusher 8 by the transportation assembly 7 for crushing, and then flows into the roller press 1 through the crusher 8, so that the crushing efficiency of the coal gangue is improved.

[0039] In some embodiments, the particle size of the coarse particles is greater than 5 mm, the particle size of the fine particles is less than 3 mm, and the particle size of the target particles is greater than or equal to 3 mm and less than or equal to 5 mm. Thus, the crushed particles are separated according to the size of the particle size, so that the crushed coal gangue can be further processed.

[0040] The coal gangue processing method according to the embodiment of the present application comprises steps S1, S2 and S3.

[0041] S1: crushing the coal gangue by using a crusher.

[0042] S2: screening the crushed coal gangue by using a screening machine, and the material with a particle size greater than 5 mm flows into the crusher for crushing again, and the material with a particle size less than 3 mm is used as sintering raw material.

[0043] S3: performing density separation on the material with a particle size greater than 3 mm and less than 5 mm by using an air jigging system, and the material with small density flows into the crusher for crushing again, and the material with large density is used as machine-made sand raw material.

[0044] The coal gangue processing method according to the embodiment of the present application has the advantages of simple steps, better processing efficiency, low cost and the like.

[0045] In the description of the present application, it is to be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the devices or elements indicated thereby must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0046] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated thereby. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0047] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication or interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0048] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or it can only mean that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or it can only mean that the horizontal height of the first feature is less than that of the second feature.

[0049] In this disclosure, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that a particular feature, structure, material, or characteristic is included in at least one embodiment or example of the present disclosure. The illustrative appearances of the above-mentioned terms in various places in the specification are not necessarily referred to the same embodiment or example. Moreover, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Furthermore, the terminology "comprising" is used in the disclosure as comprising but not limited to, that is, it is open-ended and does not exclude the presence of additional features, structures, materials, or characteristics.

[0050] Although the embodiments of the present disclosure have been shown and described above, it is understood that the above-described embodiments are exemplary, and are not to be interpreted as limiting the present disclosure, and the ordinary skilled in the art can make changes, modifications, replacements, and variations to the above-described embodiments within the scope of the present disclosure.

Claims

1. A coal gangue processing system, characterized in that, include: A crushing assembly for crushing coal gangue; A screening component is provided, one end of which is connected to one end of the crushing component so that the coal gangue crushed by the crushing component flows into the screening component. The screening component is used to separate the crushed coal gangue into coarse particles, fine particles, and target particles according to their particle size. The particle size of the target particles is between that of the coarse particles and the fine particles. The other end of the screening component is connected to the other end of the crushing component so that the coarse particles screened by the screening component flow into the crushing component to crush the coarse particles. An air jigging assembly is connected to a screening assembly. The screening assembly is located upstream of the crushing assembly and the air jigging assembly so that target particles flowing out of the screening assembly flow into the air jigging assembly. The air jigging assembly is used to sort the target particles according to their density into heavy materials with high density and light materials with low density. The air jigging assembly is connected to the crushing assembly so that light materials flowing out of the air jigging assembly flow into the crushing assembly to crush the light materials. A sand making machine is connected to the air jig assembly so that heavy material flowing out of the air jig assembly flows into the sand making machine to crush the heavy material into manufactured sand.

2. The coal gangue processing system according to claim 1, characterized in that, The coarse particles have a diameter greater than 5 mm, the fine particles have a diameter less than 3 mm, and the target particles have a diameter greater than or equal to 3 mm and less than or equal to 5 mm.

3. The coal gangue processing system according to claim 1, characterized in that, It also includes an incineration assembly connected to the screening assembly, so that fine particles flowing out of the screening assembly flow into the incinerator so that the fine particles are burned in the incinerator as sintering raw materials.

4. The coal gangue processing system according to claim 1, characterized in that, The crushing component is any one of a double roll crusher, a ring hammer crusher, or an impact crusher.

5. The coal gangue processing system according to claim 1, characterized in that, The screening component is a roller screen or a vibrating screen.

6. The coal gangue processing system according to claim 1, characterized in that, The coal gangue processing system also includes a hoist, the two ends of which are connected to the crushing component and the screening component, respectively, so that the hoist can transport the coal gangue crushed by the crushing component to the screening component.

7. The coal gangue processing system according to any one of claims 1-6, characterized in that, It also includes a transport component connected to the crushing component to transport the coal gangue to the crushing component.

8. The coal gangue processing system according to claim 7, characterized in that, The transport component is a belt conveyor, roller conveyor, or transport vehicle.

9. A method for treating coal gangue, employing the coal gangue treatment system according to any one of claims 1-8, characterized in that, include: S1: Use a crusher to crush coal gangue; S2: The crushed coal gangue is screened using a screening machine. Materials with a particle size greater than 5mm flow into the crusher for further crushing, while materials with a particle size less than 3mm are used as sintering raw materials. S3: The air jigging system is used to sort materials with a particle size greater than 3mm and less than 5mm by density. The materials with lower density flow into the crusher for further crushing, while the materials with higher density are used as raw materials for manufactured sand.

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