Screen-free reverse belt type sand-making slurry gravity grading dehydration device

Abstract

The utility model discloses a sieve-free reverse belt type sand making slurry gravity grading dehydration device which comprises an annular conveying trough belt, skirt edges are vertically arranged on the two sides of the outer surface of the conveying trough belt respectively, a driving roller and a variable frequency driving motor are arranged at the starting end of the conveying trough belt, and a redirection tail roller is arranged at the tail end of the conveying trough belt. The driving roller and the redirection tail roller are rotationally arranged on the integral support, the integral support is provided with an upper carrier roller set and a lower carrier roller set which are used for supporting the inner side of the conveying trough belt, and the integral support makes contact with the ground through a plurality of sets of lifting adjustable support legs; according to the utility model, by utilizing the principle that particulate matters can be precipitated in sewage under the influence of gravity and flow velocity, the sewage passes through the groove-shaped structure with a certain gradient, so that the particles in the sewage are precipitated under the action of gravity to form a deposition layer, and then are output in a countercurrent manner, so that the efficient recovery of fine particles and superfine particles is realized; the technical problem that materials with the aperture smaller than that of screen holes of screening equipment are difficult to recycle is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of mines, in particular to a high-efficiency recovery device for mine tailings, machine-made fine sand and stone powder fine particles, a solid-liquid separation system and a processing method for solid-liquid separation using the system. Background Art

[0002] In the field of mineral processing, since tailings sand is treated by dry discharge, it can relieve the storage capacity pressure of tailings pond, reduce the potential safety hazards of tailings pond, increase the means of tailings recycling, etc., it is necessary to provide a tailings dry discharge equipment to treat tailings sand; and in the existing dry discharge technology and device, no matter what kind of dehydration dry discharge equipment is adopted, because it adopts a screening structure, it is necessary to overcome the surface tension of the liquid, and it is difficult to process the screen to a sieve hole of less than 1mm, and there is a problem that -100 mesh fine particles are difficult to recover, especially ultrafine sand, stone powder and other ultrafine particles (-200 mesh), the loss rate is as high as more than 20%. The loss of these fine particles and ultrafine particles will not only cause excessive tailings discharge, pollute the environment and occupy land, but also directly lead to the loss of machine-made sand production and unqualified grading for the machine-made sand industry, affecting product quality. Sand washing machines and high-frequency dewatering screens, which are currently widely used in the recovery of fine sand, stone powder and fine particles at home and abroad, also have technical defects such as high energy consumption, small processing capacity, low recovery rate, severe screen wear and high recovery cost. Utility Model Content

[0003] In order to solve the above technical problems, the technical solution provided by the utility model is as follows: a screenless reverse belt type sand making mud gravity classification dehydration device, comprising an annular conveyor trough belt, the outer surface of the conveyor trough belt is respectively provided with skirts vertically on both sides, the starting end of the conveyor trough belt is provided with a driving roller and a variable frequency driving motor, and the tail end is provided with a redirecting tail roller, the driving roller and the redirecting tail roller are rotatably arranged on an integral bracket, the integral bracket is provided with an upper roller group and a lower roller group supporting the inner side of the conveyor trough belt, and the integral bracket is in contact with the ground through an array of lifting and adjustable bracket legs;

[0004] The annular conveyor trough belt is divided into a fine sand water control dry row section, a fine sand sedimentation recovery section and a sewage discharge section along its running direction. The end of the fine sand water control dry row section is tilted upward, and its elevation angle is between 8 and 12 degrees; the fine sand sedimentation recovery section is set with a natural drainage slope, with a slope of 1 to 2 degrees from the fine sand water control dry row section to the sewage discharge section; the end of the sewage discharge section is drooping, forming an angle of 3 to 5 degrees.

[0005] The advantages of the utility model compared with the prior art are as follows: the utility model utilizes the principle that particulate matter in sewage will precipitate under the influence of gravity and flow rate, and passes sewage through a trough structure with a certain slope, so that the particles in the sewage complete sedimentation under the action of gravity to form a sedimentation layer, and then outputs it through countercurrent, thereby realizing efficient recovery of fine particles and ultrafine particles, and solving the technical problem that materials below the sieve aperture of the screening equipment are difficult to recycle; the utility model adopts a three-stage independent bracket vertical adjustment structure, and the three-stage bracket can be adjusted at different angles to meet production needs. At the same time, since the utility model adopts a three-stage independent adjustment design, the fine sand recovery particle size can be flexibly adjusted by adjusting the drainage slope of the sedimentation section, breaking the problem of screening equipment not being adjusted The utility model eliminates the technical defect that the fineness of the product cannot be flexibly changed in the case of a screen; the utility model uses a skirt conveyor belt as a sedimentation trough structure, and utilizes the U-shaped structure of the trough belt to raise one side and lower the other side, so that it has the three functions of sedimentation, dehydration and sewage discharge, which are completed simultaneously on one trough belt; the utility model raises one end of the trough belt so that the water-carrying fine sand layer can control the water from the bottom, completes the dehydration process, and realizes the dry discharge of fine sand and ultra-fine sand; due to the use of non-screen dry discharge technology, there is no need to consider the influence of liquid surface tension on the water permeability effect during the production process, and the entire process basically relies on the self-gravity and fluidity of the sewage slurry, without additional energy consumption, so compared with other dry discharge methods, energy saving is more than 30%, and the fine particle recovery rate is increased by more than 15%. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 The utility model is a structural schematic diagram of a screenless reverse belt type sand making slurry gravity classification dehydration device.

[0007] Figure 2 It is a cross-sectional schematic diagram of a screenless reverse belt type sand-making slurry gravity classification dehydration device of the utility model.

[0008] Figure 3 The utility model is a schematic structural diagram of a skirt in a screenless reverse belt type sand making slurry gravity classification dehydration device.

[0009] Figure 4 The utility model is a connection diagram of an independent support 1 and an independent support 2 in a screenless reverse belt type sand making slurry gravity classification and dehydration device.

[0010] Figure 5 It is a connection schematic diagram of independent bracket 2 and independent bracket 3 in a screenless reverse belt sand-making slurry gravity classification and dehydration device in the utility model. DETAILED DESCRIPTION

[0011] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0012] In the description of the embodiments of the present utility model, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate an orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0013] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0014] In the description of the embodiments of the present invention, "multiple" means at least 2.

[0015] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 utility model can be understood according to specific circumstances.

[0016] Example:

[0017] Combined with Figure 1-5The present embodiment discloses a screenless reverse belt type sand making mud gravity classification dewatering device, comprising an annular conveyor trough belt 1, with skirts 2 vertically arranged on both sides of the outer surface of the conveyor trough belt 1, the skirts 2 are in a W-shape connected end to end, a driving roller 3 and a variable frequency driving motor are arranged at the starting end of the conveyor trough belt 1, and a redirecting tail roller 4 is arranged at the tail end, the driving roller 3 and the redirecting tail roller 4 are rotatably arranged on an integral support 5, and an upper roller group 6 and a lower roller group 7 supporting the inner side of the conveyor trough belt 1 are arranged on the integral support 5, and the integral support 5 is in contact with the ground through an array of lifting adjustable support legs 8;

[0018] The annular conveyor trough belt 1 is divided into a fine sand water control dry discharge section A, a fine sand sedimentation recovery section B and a sewage discharge section C along its running direction. The end of the fine sand water control dry discharge section A is tilted upward, and its elevation angle is between 8 and 12 degrees; the fine sand sedimentation recovery section B is set with a natural drainage slope, with a slope of 1 to 2 degrees from the fine sand water control dry discharge section A to the sewage discharge section C; the end of the sewage discharge section C is drooping, with an angle of 3 to 5 degrees.

[0019] The integral support 5 is an independent support 1 501, an independent support 2 502 and an independent support 3 503 corresponding to the fine sand control water dry row section A, the fine sand sedimentation recovery section B and the sewage discharge section C. The independent support 1 501 and the independent support 2 502 are hinged at the top, and the independent support 2 502 and the independent support 3 503 are hinged at the bottom, so that the inclination can be adjusted by the lifting adjustable support legs 8 respectively. There are at least 5 sets of lifting adjustable support legs 8 on the integral support 5; at least 3 sets of lifting adjustable support legs 8 are used to support the fine sand sedimentation recovery section B, at least 1 set of lifting adjustable support legs 8 is used to support the end of the fine sand control water dry row section A, and at least 1 set of lifting adjustable support legs 8 is used to support the end of the sewage discharge section C.

[0020] The lifting and adjustable support leg 8 includes an upper support leg 801 connected to the integral support 5 and a lower support leg 802 arranged opposite to the upper support leg 801. The upper support leg 801 and the lower support leg 802 are connected by a threaded column 803, and a locking bolt 804 is arranged at the connection between the threaded column 803 and the upper support leg 801 and the lower support leg 802.

[0021] In the specific implementation, the tailings wastewater or sand washing wastewater falls on the fine sand sedimentation recovery section B near the fine sand water control dry discharge section A, and then flows slowly with the natural drainage slope of the trough belt. During the flow, the larger particles slowly sink under the action of gravity and fall to the bottom of the trough belt, and the fine particles continue to be suspended in the wastewater, and continue to flow toward the sewage discharge section C in the form of a suspension under the action of water flow; when all the slurry flows through the trough belt of the fine sand sedimentation recovery section B, the particulate solids in the sand washing wastewater or tailings wastewater are basically precipitated, and only the ultrafine particles suspended in the sewage enter the sewage discharge section C with the sewage; the sewage entering the sewage discharge section C begins to accelerate the flow due to the change in the flow slope. The movement of the belt creates a certain scouring force on the trough belt, which washes away the fine mud and other attachments on the belt and discharges them with the sewage. Since the running direction of the belt is opposite to the flow direction of the sewage, the fine sand and stone powder that are deposited at the bottom of the belt in the fine sand sedimentation and recovery section B by the sand washing sewage or tailings sewage are driven by the belt to slowly move toward the end of the fine sand water control and dry discharge, and gradually move out of the water surface. In the belt with a positive elevation angle, the saturated water in the sedimentation layer is controlled while moving, so that the sedimentation layer is gradually dehydrated to form a fine sand sedimentation layer with a lower water content. When the dehydrated fine sand sedimentation layer runs to the driving roller, it is unloaded from the roller along with the belt trough, completing the dehydration and dry discharge process of the ultra-fine sand.

[0022] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A screenless reverse belt sand making slurry gravity classification dehydration device, characterized in that: It comprises an annular conveyor belt, the outer surfaces of which are respectively provided with skirts vertically on both sides, the starting end of the conveyor belt is provided with a driving roller and a variable frequency driving motor, the tail end is provided with a redirecting tail roller, the driving roller and the redirecting tail roller are rotatably provided on an integral support, the integral support is provided with an upper roller group and a lower roller group supporting the inner side of the conveyor belt, and the integral support is in contact with the ground through an array of lifting and adjustable support legs; The annular conveyor trough belt is divided into a fine sand water control dry row section, a fine sand sedimentation recovery section and a sewage discharge section along its running direction. The end of the fine sand water control dry row section is tilted upward, and its elevation angle is between 8 and 12 degrees; the fine sand sedimentation recovery section is set with a natural drainage slope, with a slope of 1 to 2 degrees from the fine sand water control dry row section to the sewage discharge section; the end of the sewage discharge section is drooping, forming an angle of 3 to 5 degrees.

2. The screenless reverse belt sand making slurry gravity classification and dehydration device according to claim 1 is characterized in that: The skirt is in a W-shape connected end to end.

3. The screenless reverse belt sand making slurry gravity classification and dehydration device according to claim 1 is characterized in that: The integral support is an independent support one, an independent support two and an independent support three corresponding to the fine sand water control dry drainage section, the fine sand sedimentation recovery section and the sewage discharge section. The independent support one and the independent support two are hinged at the top, and the independent support two and the independent support three are hinged at the bottom.

4. The non-screen reverse belt sand making slurry gravity classification and dewatering device according to claim 3 is characterized in that: The integral support has at least 5 groups of lifting adjustable support legs.

5. The non-screen reverse belt sand making slurry gravity classification and dehydration device according to claim 1 is characterized in that: At least three groups of the lifting adjustable support legs are used to support the fine sand sedimentation and recovery section, at least one group of the lifting adjustable support legs is used to support the end of the fine sand water control and dry drainage section, and at least one group of the lifting adjustable support legs is used to support the end of the sewage discharge section.

6. The non-screen reverse belt sand making slurry gravity classification and dehydration device according to claim 1 is characterized in that: The lifting and adjustable support leg includes an upper support leg connected to the overall support and a lower support foot arranged opposite to the upper support leg. The upper support leg and the lower support foot are connected by a threaded column, and a locking bolt is arranged at the connection between the threaded column and the upper support leg and the lower support foot.

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