Finished product stone powder removing process of small-scale sandstone processing system

Abstract

The invention belongs to the technical field of sandstone processing, and relates to a finished product stone powder removing process of a small-scale sandstone processing system.The small-scale sandstone processing system comprises a material receiving conveyor, a finished product conveyor and a head discharge hopper, and an integral sealing system is formed by a material receiving sealing guide groove, the head discharge hopper and a finished product sealing guide groove; a vibration discharging device and a spring material receiving plate are arranged in the head discharging hopper, so that bone meal separation of aggregate is accelerated; an air circulation pipeline is arranged between the head and the tail of the material receiving sealing guide groove, and a stone powder removing and collecting device is arranged on the air circulation pipeline and used for keeping air balance of the sealing system and removing and collecting stone powder in aggregate under the action of negative pressure. The process system is simple in composition, small in occupied area, low in investment cost, convenient to operate, good in economical efficiency and suitable for the finished product stone powder removing process of the small-scale gravel processing system.

Description

Technical Field

[0001] The present invention belongs to the technical field of sand and gravel processing, and more specifically, relates to a finished product stone powder removal process for a small-scale sand and gravel processing system. Background Art

[0002] Currently, there are many small-scale yards (production capacity ≤ 100 t / h) on the market, and most of them do not have a process for controlling the powder content. The dry powder separation process used in large and medium-sized sand and gravel processing systems has high requirements for sand and gravel raw materials. A large number of dust collection devices need to be installed during the production process. The powder separation station occupies a large area and has high costs. Therefore, the dry powder separation process is not very suitable for small-scale yards. Some sand and gravel processing systems adopt a wet powder removal process, which controls the powder content of the product by means of water flushing. It is only applicable to mining areas with relatively rich water resources. Moreover, fine sand and stone powder are seriously lost, the powder content rate of the finished product is too low, and a large amount of drainage and sewage treatment equipment needs to be added. The process is complex, the construction investment is large, and the by-product mud cake generated during the production process is difficult to handle.

[0003] Therefore, there is an urgent need to propose a finished product stone powder removal process for a small-scale sand and gravel processing system, which has a simple process system composition, a small floor area, low input costs, is easy to operate and has good economy. Summary of the Invention

[0004] The object of the present invention is to propose a finished product stone powder removal process for a small-scale sand and gravel processing system, which has a simple process system composition, a small floor area, low input costs, is easy to operate and has good economy.

[0005] To achieve the above-mentioned invention object, the present invention provides a finished product stone powder removal process for a small-scale sand and gravel processing system. The small-scale sand and gravel processing system includes a receiving conveyor, a finished product conveyor, and a head discharge hopper. The top of the head discharge hopper is correspondingly arranged with the discharge end of the receiving conveyor, and the bottom of the head discharge hopper is correspondingly arranged with the receiving end of the finished product conveyor. The finished product stone powder removal process includes the following steps:

[0006] 1) Arrange a receiving sealing guiding trough and a finished product sealing guiding trough on the receiving conveyor and the finished product conveyor respectively, and connect the head discharge hopper between the receiving sealing guiding trough and the finished product sealing guiding trough to form an overall sealing system;

[0007] 2) Set a vibrating feeding device and a spring receiving plate in the head discharge hopper to accelerate the separation of aggregate and bone powder and improve the air collection property of the upper space of the head discharge hopper;

[0008] 3) An air circulation pipeline is arranged between the head and the tail of the material receiving and sealing guiding chute. A stone powder removal and collection device is arranged on the air circulation pipeline, which is used to maintain the air balance of the sealing system and realize the removal and collection of stone powder in the aggregate under the action of negative pressure.

[0009] Preferably, the vibrating blanking device includes a vibrating motor and a blanking plate. The top of the blanking plate is hinged inside the bottom plate in the middle of the head discharge hopper. The vibrating motor is fixed under the bottom plate in the middle of the head discharge hopper and is fixedly connected to the blanking plate through a vibration conduction frame. The vibration conduction frame is hermetically and slidably connected to the bottom plate in the middle of the head discharge hopper, which is used to improve the separation effect of aggregate and stone powder in the head discharge hopper.

[0010] Preferably, the spring receiving plate includes a receiving plate and a spring. The receiving plate is arranged opposite to the head roller of the receiving conveyor, and the top end of the receiving plate is hinged to the head discharge hopper. The middle part of the bottom side of the receiving plate is elastically connected to the inner wall of the head discharge hopper through a spring. On the one hand, it helps to ensure the formation of negative pressure in the upper area of the head discharge hopper and ensure the removal effect of stone powder. On the other hand, it helps to strengthen the separation of stone powder in the aggregate.

[0011] Preferably, the stone powder removal and collection device includes a cyclone separator, a suction fan and a stone powder collection box. The cyclone separator and the suction fan are connected in series in the air circulation pipeline in sequence. The stone powder collection box is connected to the discharge pipe of the cyclone separator. The cyclone separator is used to remove stone powder. The removed stone powder can be stored and sold as an aggregate admixture. The clean air flow discharged by the cyclone separator is sent back to the tail of the material receiving and sealing guiding chute through the air circulation pipeline, which is used to maintain the air balance of the sealing system to reduce system dust emission.

[0012] Preferably, the suction fan adopts a variable frequency suction fan, which is convenient to control the powder content of the product by adjusting the suction force.

[0013] The present invention also includes other devices or components that can enable it to be used normally, which are all conventional technical means in the art; in addition, the devices or components not defined in the present invention, such as cyclone separators, vibrating motors, springs, variable frequency suction fans, receiving conveyors, finished product conveyors, head discharge hoppers and each sealing guiding chute, etc. all adopt conventional means in the art. Those skilled in the art can select their models and installation methods according to actual usage requirements and clearly understand how to install and control them specifically. Therefore, it will not be described in detail here.

[0014] The working principle of the present invention is as follows: By forming an integral sealing system and an air circulation pipeline, the dust generation during transportation can be reduced and the air balance requirement of the entire sealing system can be met. A spring receiving plate and a vibrating feeding device are arranged in the head discharge hopper. The vibration source is provided by a small-power vibrating motor, so that when the aggregate is discharged from the head roller of the receiving conveyor, it is in a scattered state under the vibration effect, which is beneficial to the removal of powder from the aggregate. The setting of the spring receiving plate is beneficial to the formation of negative pressure in the sealing system. By providing a stone powder removal and collection device on the air circulation pipeline, the high-dust airflow in the head discharge hopper enters the stone powder removal and collection device under the action of negative pressure for air-powder separation, realizing the removal of stone powder from the aggregate. The clean airflow is sent back to the tail of the receiving sealing guiding trough through the air circulation pipeline to maintain the air balance of the sealing system. The collected stone powder can be stored and sold as an aggregate admixture.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. The small-scale sand and gravel processing system of the present invention is fully sealed throughout the process, which can reduce dust and is beneficial to environmental protection.

[0017] 2. The powder removal method of the present invention adopts the vibrating feeding method and is combined with a stone powder removal and collection device for negative pressure dust extraction. It will not completely remove the stone powder, and the powder content can be maintained within the required range.

[0018] 3. The power source of the present invention is provided by a variable-frequency exhaust fan, which can dynamically adjust the amount of stone powder removed.

[0019] 4. The stone powder removed by the present invention is stored and sold as an aggregate admixture, increasing the production efficiency.

[0020] In summary, the process system of the present invention is simple in composition, small in floor area, extremely low in input cost, convenient to operate and good in economy. It is suitable for small-scale processing yards, can dynamically adjust the amount of stone powder removed, and realizes the dynamic control of the finished product quality. In addition, there are few power equipment, which is convenient for maintenance and repair. The collected stone powder can be stored and sold as an aggregate admixture, increasing the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the drawings and embodiments.

[0022] Figure 1 It is a schematic process layout diagram of the present invention in the embodiment.

[0023] Figure 2 For Figure 1 The enlarged structural schematic diagram of part A in

[0024] Figure 3 For Figure 1 The enlarged structural schematic diagram of part B in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The present invention will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present invention and specific embodiments. The description here is only used to explain the present invention, but not to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts, any modifications, equivalent replacements, improvements, etc., shall be included in the protection scope of the present invention.

[0026] Embodiment

[0027] As Figures 1 to 3 shown, this embodiment provides a finished product stone powder removal process for a small-scale sand and gravel processing system. The small-scale sand and gravel processing system includes a receiving conveyor 1, a finished product conveyor 2, and a head discharge hopper 3. The top of the head discharge hopper is correspondingly arranged with the discharge end of the receiving conveyor, and the bottom of the head discharge hopper is correspondingly arranged with the receiving end of the finished product conveyor. The finished product stone powder removal process includes the following steps:

[0028] 1) A receiving sealed guiding trough 4 and a finished product sealed guiding trough 5 are respectively arranged on the receiving conveyor and the finished product conveyor, and the head discharge hopper is connected between the receiving sealed guiding trough and the finished product sealed guiding trough to form an overall sealed system;

[0029] 2) A vibrating feeding device and a spring receiving plate are arranged in the head discharge hopper to accelerate the separation of aggregate and bone powder and improve the air collection property of the upper space of the head discharge hopper;

[0030] 3) An air circulation pipeline 6 is arranged between the head and the tail of the receiving sealed guiding trough. The air circulation pipeline is provided with a stone powder removal and collection device for maintaining the air balance of the sealed system and realizing the removal and collection of stone powder in the aggregate under negative pressure.

[0031] In this embodiment, the vibrating feeding device includes a vibrating motor 7 and a bulk material plate 8. The top of the bulk material plate is hinged in the bottom plate in the middle of the head discharge hopper. The vibrating motor is fixed below the bottom plate in the middle of the head discharge hopper and is fixedly connected to the bulk material plate through a vibration conduction frame 9. The vibration conduction frame is hermetically and slidably connected to the bottom plate in the middle of the head discharge hopper to improve the separation effect of aggregate and stone powder in the head discharge hopper.

[0032] Among them, the spring receiving plate includes a receiving plate 10 and a spring 11. The receiving plate is arranged opposite to the head roller 12 of the receiving conveyor, and the top end of the receiving plate is hinged to the head discharge hopper. The middle part of the bottom side of the receiving plate is elastically connected to the inner wall of the head discharge hopper through a spring. On the one hand, it helps to ensure the formation of negative pressure in the upper area of the head discharge hopper and ensure the stone powder removal effect. On the other hand, it helps to strengthen the separation of stone powder in the aggregate.

[0033] Among them, the stone powder removal and collection device includes a cyclone separator 13, a suction fan 14, and a stone powder collection box 15. The cyclone separator and the suction fan are connected in series in the air circulation pipeline in sequence. The stone powder collection box is connected to the discharge pipe of the cyclone separator. The cyclone separator is used to remove stone powder, and the removed stone powder can be stored and sold as an aggregate admixture. The clean air flow discharged by the cyclone separator is sent back to the tail of the material receiving and sealing guiding trough through the air circulation pipeline to maintain the air balance of the sealing system and reduce system dust emission.

[0034] Specifically, the suction fan adopts a variable frequency suction fan, which is convenient for controlling the powder content of the product by adjusting the suction force.

[0035] The working principle of the present invention is as follows: By forming an overall sealing system and an air circulation pipeline, dust emission during transportation can be reduced and the air balance requirement of the entire sealing system can be met. A spring material receiving plate and a vibrating blanking device are arranged in the head discharge hopper, and the vibration source is provided by a small-power vibration motor, so that when the aggregate is discharged from the head roller of the material receiving conveyor, it is in a scattered state under the vibration effect, which is beneficial to the separation of powder from the aggregate. The setting of the spring material receiving plate is beneficial to the formation of negative pressure in the sealing system. By providing a stone powder removal and collection device on the air circulation pipeline, the high-dust air flow in the head discharge hopper enters the stone powder removal and collection device under the action of negative pressure for air-powder separation, realizing the removal of stone powder in the aggregate. The clean air flow is sent back to the tail of the material receiving and sealing guiding trough through the air circulation pipeline to maintain the air balance of the sealing system, and the collected stone powder can be stored and sold as an aggregate admixture.

[0036] The embodiments of the present invention have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments.

Claims

1. A finished product stone powder removal process for a small-scale sand and gravel processing system, the small-scale sand and gravel processing system comprising a material receiving conveyor, a finished product material conveyor, and a head discharge hopper, wherein the top of the head discharge hopper is correspondingly arranged with the discharge end of the material receiving conveyor, and the bottom of the head discharge hopper is correspondingly arranged with the material receiving end of the finished product material conveyor, characterized in that, The finished product stone powder removal process includes the following steps: 1) Arrange a receiving material sealing guide trough and a finished product material sealing guide trough on the receiving conveyor and the finished product conveyor respectively, and connect the head discharge hopper between the receiving material sealing guide trough and the finished product material sealing guide trough to form an overall sealing system; 2) Set a vibrating feeding device and a spring receiving plate in the head discharge hopper to accelerate the separation of bone powder from the aggregate and improve the air gathering property of the upper space of the head discharge hopper; 3) Set an air circulation pipeline between the head and the tail of the receiving material sealing guide trough. The air circulation pipeline is provided with a stone powder removal and collection device, which is used to maintain the air balance of the sealing system and realize the removal and collection of stone powder in the aggregate under the action of negative pressure.

2. The finished product stone powder removal process according to claim 1, wherein The vibrating feeding device includes a vibrating motor and a material spreading plate. The top of the material spreading plate is hinged inside the bottom plate in the middle of the head discharge hopper. The vibrating motor is fixed below the bottom plate in the middle of the head discharge hopper and is fixedly connected with the material spreading plate through a vibration conduction frame. The vibration conduction frame is hermetically and slidably connected with the bottom plate in the middle of the head discharge hopper.

3. The finished product stone powder removal process according to claim 1, characterized in that, The spring receiving plate includes a receiving plate and a spring. The receiving plate is arranged opposite to the head roller of the receiving conveyor, and the top end of the receiving plate is hinged to the head discharge hopper. The middle part of the bottom side of the receiving plate is elastically connected with the inner wall of the head discharge hopper through a spring.

4. The finished product stone powder removal process according to claim 1, characterized in that: The stone powder removal and collection device includes a cyclone separator, a suction fan and a stone powder collection box. The cyclone separator and the suction fan are connected in series in the air circulation pipeline in sequence. The stone powder collection box is connected to the blanking pipe of the cyclone separator.

5. The finished product stone powder removal process according to claim 4, characterized in that: The suction fan adopts a variable frequency suction fan.

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