CN201537524U

CN201537524U - Single-helical grader overflow weir structure

Info

Publication number: CN201537524U
Application number: CN200920258444XU
Authority: CN
Inventors: 何海军; 左金宽; 武占保; 郭春波; 张建勇
Original assignee: Lingbao Jinyuan Mining Co Ltd
Current assignee: Lingbao Jinyuan Mining Co Ltd
Priority date: 2009-11-14
Filing date: 2009-11-14
Publication date: 2010-08-04
Anticipated expiration: 2019-11-14

Abstract

The utility model discloses a single-helical grader overflow weir structure, including a main body; four overflow weirs are arranged on periphery on the upper part of the main body; a single-helical blade is obliquely arranged in a water tank enclosed by four overflow weirs; the single-helical blade is rotatably connected with the main body; height of the overflow weir on the lower end of the single-helical blade is lower than that of the overflow weir on the higher end of the single-helical blade; and the upper surfaces of two overflow weirs connecting with two sides on the higher end overflow weir and two sides of the lower end overflow weir are obliquely disposed. The utility model has the simple structure and improved structure, changes conventional overflow on two sides to drain on one side, and improves the overflow fineness and the coarse particle settling speed so as to enhance the grinding effect.

Description

Single-spiral classifier downflow weir structure

Technical field

The utility model relates to a kind of grader that is used for ore dressing, relates in particular to a kind of single-spiral classifier downflow weir structure.

Background technology

Grader is widely used in being made into closed cycle with ball mill in the ore dressing plant and shunts ore deposit sand, or is used in and comes classification ore in sand form and thin mud in the gravity mill, and in the metal beneficiation flowsheet ore pulp is carried out grading, and operations such as the desliming in the washup operation, dehydration.Spiral classifier is to vary in size by means of the solid grain, proportion difference, thereby the different principle of the sinking speed in liquid, and thin ore particle swims to become in water and overflows, and rough grain is sunken to bottom land.Push top to by spiral and discharge, carry out a kind of classifying equipoment of mechanical classification, can filter the material powder that grinds in the ball mill, utilize coarse fodder helical blade to screw in the ball mill charging aperture then, the fines that filters out is discharged from downflow weir.At present, single-spiral classifier work in the middle of ubiquity such problem: the single-spiral classifier downflow weir from middle separated into two parts, sampling detects overflow fineness respectively, repeatedly the contrast back shows repeatedly, the fineness of grader helical blade entry one end is higher than the other end, and this is that coarse granule is under the drive of undercurrent because can take up the part coarse granule and form undercurrent during the single-screw blade water outlet of grader, have little time to sink to overflow, have influence on the coarse granule sinking speed.

The utility model content

The utility model provides a kind of single-spiral classifier downflow weir structure that can improve overflow fineness and coarse granule sinking speed in order to solve weak point of the prior art.

For solving the problems of the technologies described above, the utility model adopts following technical scheme: single-spiral classifier downflow weir structure, comprise body, be provided with four downflow weirs around the body upper, tilt to be provided with the single-screw blade in the tank that four downflow weirs surround, single-screw blade and body are rotationally connected, the height of weir plate of the low end of described single-screw blade is lower than the height of weir plate of the higher end of single-screw blade, and the downflow weir both sides of a higher end are obliquely installed with two downflow weir upper surfaces that the downflow weir both sides of low end are connected.

After adopting said structure, because a height of weir plate of the single-screw blade water intake end of grader is minimum, slurries in the tank just overflow from this end, the single-screw blade can take up the part coarse granule and just can not overflow very soon when rotating water outlet, so just strengthened the grader decanting zone, be convenient to the coarse granule sedimentation, the downflow weir of increasing can stop that undercurrent makes it to slow down, alleviate undercurrent to coarse grained influence, thereby reach the effect that improves fineness.The utility model is simple in structure, can improve on the original structure basis, changes original both sides overflow into one-sided discharging, improves overflow fineness and coarse granule sinking speed, to promote grinding efficiency.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

The specific embodiment

As shown in Figure 1, single-spiral classifier downflow weir structure of the present utility model, comprise body 1, be provided with four downflow weirs 2 around body 1 top, tilt to be provided with single-screw blade 3 in the tank that four downflow weirs 2 surround, single-screw blade 3 is rotationally connected with body 1, the height of the downflow weir 2-1 of single-screw blade 3 low ends is lower than the height of the downflow weir 2-2 of single-screw blade 3 higher ends, the downflow weir 2-2 both sides of a higher end are obliquely installed with two downflow weir 2 upper surfaces that the downflow weir 2-1 both sides of low end are connected, and downflow weir 2-1 place is provided with overfall 4.

During work, slurries in the grader overflow by overfall 4, obviously improve overflow fineness, single-screw blade 3 can take up the part coarse granule when rotating water outlet and just can not overflow very soon, so just strengthened the grader decanting zone, be convenient to the coarse granule sedimentation, the downflow weir 2-2 that increases can stop that undercurrent makes it to slow down, alleviate undercurrent to coarse grained influence, thereby reach the effect that improves fineness.

Claims

1. single-spiral classifier downflow weir structure, comprise body, be provided with four downflow weirs around the body upper, tilt to be provided with the single-screw blade in the tank that four downflow weirs surround, single-screw blade and body are rotationally connected, it is characterized in that: the height of weir plate of the low end of described single-screw blade is lower than the height of weir plate of the higher end of single-screw blade, and the downflow weir both sides of a higher end are obliquely installed with two downflow weir upper surfaces that the downflow weir both sides of low end are connected.