Feeding well for mixing incoming sand from dressing plant and flocculating agent at top of sand silo

Abstract

The utility model relates to the technical field of related equipment for backfilling in a goaf, in particular to a feeding well for mixing selected plant coming sand and a flocculating agent at the top of a sand silo, which is characterized in that the bottom of a central feeding barrel is fixedly connected with an inverted conical umbrella-shaped guide frame, a circular pipe is arranged at the top of the center of the inverted conical umbrella-shaped guide frame, and an annular fan impeller is sleeved on the circular pipe; and the central feeding barrel is fixed above the deep cone sedimentation sand silo. The utility model has the beneficial effects that as the density of sand from a separation plant is large, and the liquid level in the feeding barrel is lower than the clear water layer outside the barrel, clear water in a bin can flow into the barrel through the dilution water inlet of the central feeding barrel to dilute the sand, and the concentration is more suitable for reacting with a flocculating agent. The device is simple to maintain and uniform in stirring, and sand from a separation plant and a flocculating agent can be fully mixed to accelerate sedimentation.

Description

Technical Field

[0001] The utility model relates to the technical field of equipment related to backfilling of goaf areas, in particular to a feeding well for mixing sand from a concentrator with a flocculant at the top of a sand bin. Background Art

[0002] With the gradual depletion of mineral resources on the surface and in the shallow underground, the mining of mineral resources has shifted to deep mining, which has brought about a series of geological disasters such as surface subsidence, land accumulation of ore dressing tailings, and harm caused by solid waste. Among them, using mining tailings to prepare paste and backfill the goaf is an effective means to solve the above problems.

[0003] The initial concentration of the whole tailings slurry is low and the water content is high. It must be concentrated and settled before being discharged into the tailings pond or mixed with cement to prepare a paste to fill the goaf. However, the natural settling speed of the mortar is slow and time-consuming, and the natural settling is not complete. At the same time, the continuous influx of sand from the concentrator will muddy the sedimentation deep cone sand bin. In order to accelerate the settling, the method of adding flocculants must be adopted.

[0004] Unpowered deep cone sedimentation sand is generally provided with a sand inlet from the concentrator at the top, and a flocculant addition inlet is arranged around the top of the deep cone sedimentation sand bin. The sand from the concentrator and the flocculant cannot be evenly mixed, the tailings particles are not completely agglomerated, and the sedimentation rate is slow. The continuously injected tailings from the concentrator can easily muddy the upper clear water, which not only fails to accelerate the sedimentation but also causes a waste of flocculants. The heavy metals in the slurry also lead to ecological environmental pollution.

[0005] In order to achieve high-speed sedimentation of tailings in the concentrator, high requirements are put forward for the feeding method of tailings in the concentrator and the effective mixing and adding method with flocculants. Deep cone thickener is one of the commonly used equipment in mines. It has a small footprint, strong working capacity, good thickening effect, and can effectively treat tailings. However, the equipment price is high, and the later maintenance is complicated, which increases the production input and operating costs of the user department.

[0006] To this end, the present application designs a feeding well for mixing sand and flocculant from a sand bin top concentrator to solve the above problems. Utility Model Content

[0007] In order to make up for the deficiencies in the prior art, the utility model provides a feeding well for mixing sand and flocculant in a sand bin top selection plant.

[0008] A feeding well for mixing sand from a concentrator with a flocculant at the top of a sand bin, comprising a central feeding barrel, characterized in that:

[0009] The bottom of the central feeding bucket is fixedly connected with an inverted cone umbrella-shaped guide frame, the central top of the inverted cone umbrella-shaped guide frame is provided with a round tube, the round tube is sleeved with an annular impeller, and the central feeding bucket is fixed above the deep cone sedimentation sand bin.

[0010] Furthermore, in order to better realize the utility model, a bottom connecting frame is provided at the bottom of the central feeding barrel, a guide frame connecting seat is provided at the edge of the inverted cone umbrella-shaped guide frame, and the bottom connecting frame and the guide frame connecting seat are fixedly connected by connecting bolts.

[0011] Furthermore, in order to better realize the utility model, a sand inlet and a dilution water inlet are provided above the central feeding barrel, the surface of the clean water in the deep cone sedimentation sand bin just covers the sand inlet but does not submerge the dilution water inlet, and a circular spiral slope guide plate spiraling downward is provided at the elevated position of the bottom surface of the sand inlet to receive the incoming sand and rotate in the barrel.

[0012] Furthermore, in order to better implement the utility model, guide plates are provided at intervals on the barrel wall along the upper edge of the annular slope of the central feeding barrel to better gather the sand to the center of the barrel.

[0013] Furthermore, in order to better realize the utility model, the spiral slope guide plate and the inner wall of the central feeding barrel are covered with polymer wear-resistant materials, including cast stone, to reduce the scouring of the barrel wall by the incoming sand and extend the service life of the spiral slope guide plate.

[0014] Furthermore, in order to better realize the utility model, the sand inlet is tangent to the side of the central feed barrel, reducing the resistance of the tailings entering the central feed barrel and the impact on the barrel wall, so that the tailings can smoothly spiral into the central feed barrel to prevent splashing.

[0015] Furthermore, in order to better realize the utility model, the umbrella guide frame of the inverted cone umbrella guide frame can make the tailings particles agglomerated and better diverted downward, and evenly settle at the bottom of the sand bin. The center of the middle hollow circular tube of the inverted cone umbrella guide frame serves as a vent, and the circular tube is above the water surface so that the pressure inside and outside the umbrella cover is equal, preventing negative pressure from occurring inside the umbrella cover.

[0016] Furthermore, in order to better implement the utility model, the blades of the annular impeller are tilted and deflected at an angle of 10° to the horizontal, which can increase the mixing time of the incoming sand and additives such as flocculants, thereby presenting a better sedimentation effect.

[0017] Furthermore, in order to better realize the utility model, flocculant agent adding pipelines are arranged at multiple points in the central feed barrel, so that the incoming sand can be better and more evenly mixed with the flocculant in the feed barrel.

[0018] The beneficial effects of the utility model are:

[0019] Since the density of the incoming sand from the concentrator is large, the liquid level in the feed barrel of the utility model is lower than the clear water layer outside the barrel, and the clear water in the bin can flow into the barrel through the dilution water inlet of the central feed barrel to dilute the incoming sand to reach a concentration more suitable for reacting with the flocculant. The utility model is easy to maintain and stirs evenly, and can fully mix the incoming sand from the concentrator with the flocculant to accelerate sedimentation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a three-dimensional structural diagram of the installation position of the feed well and the sand bin adopted in the utility model;

[0021] Figure 2 This is the assembly front view of the feed well of the utility model;

[0022] Figure 3 It is a top view of the feeding well of the utility model;

[0023] Figure 4 It is a side sectional view of the feed well of the utility model;

[0024] Figure 5 It is a schematic diagram of the axial side of the annular impeller of the utility model.

[0025] In the figure,

[0026] 1. Center feeding bucket, 2. Inverted cone umbrella guide frame, 3. Annular fan impeller, 4. Connecting bolts, 101. Sand inlet, 102. Dilution water inlet, 103. Spiral slope guide plate, 104. Guide plate, 105. Bottom connecting frame, 201. Guide frame connecting seat, 202. Vent, 301. Swing blade. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only some embodiments of the utility model, not all 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.

[0028] Therefore, the following detailed description of the embodiments of the utility model provided in the accompanying drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents selected embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0029] Figure 1-Figure 5This is a specific embodiment of the utility model, which is a feeding well for mixing sand from a beneficiation plant and flocculant at the top of a sand bin. The water surface in the sand bin is above the sand inlet of the central feeding barrel 1 and must not be above the dilution water inlet, so that clean water can smoothly enter the central feeding barrel 1.

[0030] The center hole of the annular impeller 3 passes through the round tube on the inverted cone umbrella-shaped guide frame 2 and is placed inside the central feed barrel 1 as a whole, and arranged concentrically. The bottom connecting frame 105 of the central feed barrel 1 is connected and fixed to the guide frame connecting seat 201 of the inverted cone umbrella-shaped guide frame 2 using connecting bolts 4. After the installation is completed, the feed well is hoisted at the center of the top of the sand bin.

[0031] When in use, the incoming sand from the beneficiation plant enters the central feed barrel 1 through the incoming sand inlet 101. Under the action of the spiral slope guide plate 103 and the guide plate 104, the incoming sand is mixed with the dilution water flowing in through the dilution water inlet 102, and rotates in the central feed barrel 1. Flocculants and other additives are added at multiple points above the barrel, and are fully mixed with the tailings under the action of the swing blades 301 of the annular impeller 3, increasing the contact mixing time and contact surface, so that the solid particles in the tailings are quickly condensed and sunk to the bottom of the sand bin. The conical surface of the inverted cone umbrella guide frame 2 can slow down the sedimentation speed of the tailings and prevent the clear water on the top of the sand bin from returning to muddy water.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. A feeding well for mixing sand from a sand processing plant with a flocculant at the top of a sand bin, comprising a central feeding barrel (1), characterized in that: The bottom of the central feed bucket (1) is fixedly connected to an inverted cone-shaped guide frame (2), the central top of the inverted cone-shaped guide frame (2) is provided with a round tube, and an annular impeller (3) is sleeved on the round tube. The central feed bucket (1) is hoisted above the deep cone sedimentation sand bin.

2. The feeding well for mixing sand from the sand processing plant and flocculant at the top of the sand bin according to claim 1 is characterized by: A bottom connecting frame (105) is provided at the bottom of the central feeding barrel (1), a guide frame connecting seat (201) is provided at the edge of the inverted cone umbrella-shaped guide frame (2), and the bottom connecting frame (105) and the guide frame connecting seat (201) are fixedly connected by connecting bolts (4).

3. The feeding well for mixing sand from the sand processing plant and flocculant at the top of the sand bin according to claim 1 is characterized by: A sand inlet (101) and a dilution water inlet (102) are provided above the central feeding barrel (1); the surface of the clean water in the deep cone sedimentation sand bin just covers the sand inlet (101) but does not submerge the dilution water inlet (102); and a spiral downward annular spiral slope guide plate (103) is provided at a raised position on the bottom surface of the sand inlet (101) to receive the sand and rotate in the barrel.

4. The feeding well for mixing sand from the sand processing plant and flocculant at the top of the sand bin according to claim 3 is characterized by: Guide plates (104) are provided at intervals on the barrel wall along the upper edge of the annular slope of the central feed barrel (1), so as to better gather the sand to the center of the barrel.

5. The feeding well for mixing sand from the sand processing plant and flocculant at the top of the sand bin according to claim 3 is characterized by: The spiral slope guide plate (103) and the inner wall of the central feed barrel (1) are covered with a polymer wear-resistant material, including cast stone, so as to reduce the scouring of the barrel wall by the incoming sand and extend the service life of the spiral slope guide plate (103).

6. The feeding well for mixing sand from the concentrator with flocculant at the top of the sand bin according to claim 3, characterized in that: The sand inlet (101) is tangent to the side of the central feed barrel (1), thereby reducing the resistance of the tailings entering the central feed barrel (1) and the impact on the barrel wall, so that the tailings can smoothly spirally flow into the central feed barrel (1) to prevent splashing.

7. The feeding well for mixing sand from the sand processing plant and flocculant at the top of the sand bin according to claim 1 is characterized by: The umbrella-shaped guide frame of the inverted cone-shaped umbrella-shaped guide frame (2) can guide the tailing sand particles downward better after agglomeration, and evenly settle at the bottom of the sand bin. The center of the middle hollow circular tube of the inverted cone-shaped umbrella-shaped guide frame (2) serves as a vent (202), and the circular tube is above the water surface so that the pressure inside and outside the umbrella cover is equal, thereby preventing negative pressure from occurring inside the umbrella cover.

8. The feeding well for mixing sand from the concentrator with flocculant at the top of the sand bin according to claim 1, characterized in that: The blades of the annular impeller (3) are tilted and tilted at an angle of 10° with respect to the horizontal, which can increase the mixing time of the incoming sand and the flocculant, thereby achieving a better sedimentation effect.

9. The feeding well for mixing sand from the sand processing plant and flocculant at the top of the sand bin according to claim 1 is characterized by: The central feed barrel (1) is provided with flocculant adding pipelines at multiple points, so that the incoming sand and the flocculant can be mixed more evenly in the feed barrel.

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