CN203220788U - Underflow anti-blocking device of thickener - Google Patents

Abstract

The utility model discloses an underflow anti-blocking device of a thickener. A cylindrical discharge well is mounted at the bottom of a cone hopper of the thickener, a feed port and a discharge port are respectively formed on the side wall of the discharge well, the discharge port is communicated with a feed pipe of a conveying pump, the feed port is communicated with a discharge pipe of a circulating pump, and the feed pipe of the circulating pump is communicated with a material supply pipe of the thickener; and the requirements are as follows: the discharge port is 200-500mm higher than the feed port, the feed port is positioned at the bottom of the side wall of the discharge well, and the axial line of the feed port is tangential to the side wall of the discharge well. Well thickened ore pulp is discharged through the discharge pipe of the conveying pump; the circulating pump can draw out the small quantity of the ore pump from the material supply pipe 5 of the thickener as a circulating medium for circulation under low-energy consumption conditions, material is supplied into the discharge well along the tangential direction during circulating discharge, the ore pulp in the discharge well can be kept in a state of moving always, and the blockage of an underflow discharge port of the thickener can be further prevented.

Description

An anti-blocking device for underflow of thickener

technical field

The utility model relates to solid-liquid separation equipment in mineral processing, in particular to a thickener.

Background technique

The thickener is one of the important equipment in the mineral processing industry. The main principle is based on the gravity settlement, and it is widely used in the solid-liquid separation operation of the mineral processing plant. There are many types of thickeners currently in use, mainly including round pool thickeners, inclined plate thickeners and high-efficiency thickeners. There are certain similarities in structure. Generally, the upper part is a cylinder, and the lower part is connected to a cone with a certain cone angle. The material discharged from the lower part after the slurry is thickened is called underflow, and the material overflowed from the upper part is called overflow. The overflow is an open discharge, which is generally smooth. The underflow usually needs to ensure a certain discharge concentration. When the required discharge concentration is high, the material may block the underflow outlet, resulting in the underflow not being discharged continuously. High, this problem is more prominent.

Contents of the invention

The purpose of this utility model is to design an anti-blocking device for the underflow of the thickener in order to prevent the underflow discharge port of the thickener; discharge.

The purpose of this utility model is implemented through the following technical solutions:

A thickener bottom flow anti-blocking device is characterized in that a cylindrical discharge well is installed at the bottom of the cone bucket of the thickener, and the side walls of the discharge well are respectively provided with a material inlet and a material outlet. The feed port is connected to the feed pipe of the conveying pump, the feed port is connected to the discharge pipe of the circulation pump, and the feed pipe of the circulation pump is connected to the feed pipe of the thickener; requirements: the discharge port is 200-500mm higher than the feed port, And the feed port is located at the bottom of the side wall of the discharge well, and the axis of the feed port is tangent to the side wall of the discharge well.

The diameter of the discharge well is preferably 1-3 meters, and the aspect ratio is preferably 0.5-1.

The advantages of the utility model are described below through the working principle of the utility model. The dense ore pulp is discharged through the discharge pipe of the delivery pump; the circulation pump extracts a small amount of ore pulp from the thickener feeding pipe 5 under the condition of low energy consumption as a circulation medium for circulation. During the circular discharge, the material is fed into the discharge well along the tangential direction, keeping the slurry in the discharge well in a state of constant movement, and preventing the blockage of the underflow discharge port of the thickener.

Description of drawings

Fig. 1 is the front view of the utility model, has shown the arrangement situation of the utility model anti-blocking device on the thickener among the figure;

Fig. 2 is the A-A view of Fig. 1 .

In the figure: 1-thickener, 2-discharging well, 3-delivery pump, 4-circulation pump, 5-feeding pipe, 6-feeding port, 7-feeding port.

Detailed ways

As shown in Figures 1 and 2, the bottom flow anti-blocking device of the thickener of the present invention is to install a cylindrical discharge well 2 at the bottom of the cone bucket of the thickener 1; The feed port 6 and the discharge port 6 are communicated with the delivery pump 3 feed pipes; The feed pipe is connected to the feed pipe 5 of the thickener 1; the height of the discharge port 6 higher than the feed port 7 is required to be 200-500mm (see Figure 1), and the axis of the feed port 7 is on the side of the discharge well 2 The walls are tangent (see Figure 2).

The diameter of the discharge well 2 is preferably 1-3 meters, and the aspect ratio is preferably 0.5-1.

Example: An iron ore concentrator needs to carry out thickening treatment on comprehensive tailings for underground cement filling. The feed concentration of the thickener is 30%, and the underflow concentration is required to reach more than 68%. According to the flow rate and settling velocity of the tailings in the concentrator, two thickeners with a diameter of 10m, a column height of 8m and a cone angle of 45° are selected for design and selection. The cone bucket adopts steel structural parts, and a round hole with a diameter of 2m is opened at the bottom of the cone bucket, which is rigidly connected with the discharge well 2. The discharge well 2 is a cylinder with a diameter of 2m and a height of 2m. The bottom of the discharge well 2 is made of steel. rack for support. Circulation pump 4 and conveying pump 3 are respectively installed on both sides of discharge well 2. Circulation pump 4 extracts a small amount of low-concentration ore slurry from thickener feeding pipe 5 as circulation medium, and feeds it tangentially to the bottom of discharge well 2 to form For swirling flow, the feeding pipe of the transfer pump 3 is located 200mm above the outlet pipe of the circulating pump 4.

After the equipment is put into use, the underflow concentration of the thickener can reach 70%, and the underflow can be discharged continuously and stably, which effectively solves the problem of blockage of the thickener caused by the settlement of high-concentration pulp at the bottom and the difficulty of underflow discharge, and achieves the expected goal Effect.

Claims (2)

1. A thickener bottom flow anti-blocking device is characterized in that a cylindrical discharge well is installed at the bottom of the thickener cone bucket, and the sidewall of the discharge well is respectively provided with a feed inlet and a discharge outlet , the discharge port is connected with the feed pipe of the conveying pump, the feed port is connected with the discharge pipe of the circulation pump, and the feed pipe of the circulation pump is connected with the feed pipe of the thickener; the discharge port is 200-500mm higher than the feed port, And the feed port is located at the bottom of the side wall of the discharge well, and the axis of the feed port is tangent to the side wall of the discharge well. the 2. The thickener underflow anti-blocking device according to claim 1, characterized in that the diameter of the discharge well is 1-3 meters, and the ratio of height to diameter of the discharge well is 0.5-1. the

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