CN201394479Y

CN201394479Y - Spiral overflow grading discharging device for wet-type grinder

Info

Publication number: CN201394479Y
Application number: CN200920172105XU
Authority: CN
Inventors: 唐新民
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-05-15
Filing date: 2009-05-15
Publication date: 2010-02-03
Anticipated expiration: 2019-05-15

Abstract

The utility model discloses a spiral overflow grading discharging device of a wet-type grinder, characterized in that the discharging device comprises a cylindrical barrel (1) and a truncated cone shape discharging pipe (3) of which one end is connected with the outer end of the barrel (1) in the sealing way, spiral bosses (2) are arranged on the inner wall of the barrel, wherein the spiral boss (2) at one side of the inner end of the barrel (1) is a four-start or more spiral, the height of the spiral boss (2) is more than or equal to 50 mm, the spiral boss (2) at one side of the outer end isa twin-feed or more spiral, the end-face of the other end of the discharging pipe (3) is connected with a screen plate (5) of which the mesh is circular or in circular arc. According to the utility model, the self-weight revolving mass of the grinder can be decreased, the actual mixing filling ratio of the grinder can reach above 60%, the operation is stable, the granularity of the product can beguaranteed to be smaller than 200 mushes, and the granularity of the product is better and no coarse products occur.

Description

Wet mill spiral overflow size separation discharger

Technical field

The utility model relates to a kind of discharger of wet mill, especially a kind of wet mill screw classifying discharger.

Background technology

Grinding machine is to be used for the key equipment of broken material (ore).The grinding machine that adds water at broken comminution process claims wet mill.It has overflow type and lattice type two big classes.Lattice type is interrupted ore discharge for forcing, and overflow type is a center overflow ore discharge.

The discharge end of overflow type grinding machine is made up of discharging end cap, aside-liner, discharging opening and drum sieve.Wherein the discharging opening endoporus is cylindrical by cylindrical shell the inner, and the outer end is tubaeform (inner small and outside big); The corresponding cylindrical shell pack completeness of interior circular hole has only about 30%.Helical blade is generally arranged in the circular hole, but spiral head number is generally 2 (also having 1).Blade height has only about 25mm, and pitch is very short, sand return poor ability in cylindrical shell.The cylindrical shell rotation, the mixed filling rate of steel ball and ore (slurry) is more than 30%, and they are slipped into discharging opening by the copper body under discrepancy in elevation effect; They press granule size elder generation postprecipitation in this flow process, the coarse grain sand setting is by sand return screw propulsion cylindrical shell, and particulate is discharged with ore pulp." running thick " will occur when actual mixed filling rate reaches more than 38%, promptly steel ball and coarse grain are discharged with ore pulp.The actual mixed filling rate about 35% that runs well, but when the start-stop car, " run thick " still in various degree, for reducing " running thick " influence, adopt emptying parking and discharging drum sieve.

The discharging portion of lattice type grinding machine is made up of discharging end cap, big or small grate, center liner plate, big or small elevator bucket, discharging opening and drum sieve.Its discharging size grate and center liner plate, the passages more than big or small elevator bucket and discharging opening formed 8 groups separate.The discharging opening endoporus is cylinder (interior) loudspeaker (outward) shapes, no helical blade.The cylindrical shell running, ore particle (slurry) and steel ball less than the grate sieve aperture, pour in the elevator bucket of bottom, elevator bucket rotates with cylindrical shell and promotes, ore (slurry) face in the bucket is higher than ore (slurry) face in the cylindrical shell, under discrepancy in elevation effect, and the ore pulp that a part of fine particle content is more, preferentially flow back to cylindrical shell by sieve aperture, all the other pour into discharging opening and discharge.General granularity is pounded cataclasm greater than the steel ball of sieve aperture, and the probability of " running thick " is also more, for reducing " running thick " influence, uses the discharging drum sieve.Lattice type grinding machine general not though " running thick ", because of its operation reason, actual mixed filling rate, especially ore pulp pack completeness are 25% to more than 50%, and its product granularity and treating capacity alter a great deal.

The utility model content

The purpose of this utility model solves the problem that the actual mixed filling rate of overflow grinding machine reaches " running thick " very little exactly.

The technical solution adopted in the utility model is: wet mill spiral overflow size separation discharger, it comprises the truncated cone shape discharge nozzle that a cylindrical drum and an end and cylindrical shell outer end are tightly connected, cylinder inboard wall is provided with the spirality projection, the spirality projection of the inner side of cylindrical shell is more than or equal to 4 spirals, the spirality projection of outer end one side is more than or equal to 2 spirals, the end face of the other end of discharge nozzle is connected with sieve plate, and the sieve aperture of sieve plate is circle or circular arc.

Adopt technique scheme, its actual mixed filling rate is more than or equal to 50%; Owing to dwindle the discharging opening internal diameter of the overflow grinding machine of knowing clearly and strengthen the propelling movement ability of sand return spiral, and set up discharge nozzle, strengthened precipitation fractionation as the settling zone; The sieve aperture of the sieve plate of end face is circle or circular arc, " the running thick " when preventing the start-stop car.

The beneficial effects of the utility model are: the deadweight rotating mass that has reduced grinding machine; The actual mixed filling rate of grinding machine reaches about 60%, and stable operation; The granularity of having guaranteed ore milling product is less than 200 orders, and the ore milling product granularity is better, and " does not run thick ".

Description of drawings

Fig. 1 is the utility model structural representation.

Fig. 2 is the sieve plate schematic diagram.

Among the figure, 1, cylindrical shell, 2, spiral salient, 3, discharge nozzle, 4, sieve plate, 5, flange, 6, sieve aperture.

The specific embodiment

The utility model wet mill spiral overflow size separation discharger, as shown in Figure 1, it comprises the truncated cone shape discharge nozzle 3 that a cylindrical drum 1 and an end and cylindrical shell 1 outer end are tightly connected, the internal diameter on the cylindrical shell of present embodiment is 600mm.Cylindrical shell 1 inwall is provided with spiral salient 2, and the spirality projection of cylindrical shell 1 an inner side is a four-start spiral projection 2, and the spiral salient 2 of outer end one side is two spirals, and the height of spiral salient 2 is 70mm, and thickness is 16mm.The end face of the other end of discharge nozzle 3 is connected with sieve plate 4, sieve plate 4 as shown in Figure 2, sieve plate 4 is realized being connected with discharge nozzle 3 end faces by flange 5.The sieve aperture 6 of sieve plate 4 is a circular arc.

Claims

1, wet mill spiral overflow size separation discharger, it is characterized in that it comprises the truncated cone shape discharge nozzle [3] that a cylindrical drum [1] and an end and cylindrical shell [1] outer end are tightly connected, cylinder inboard wall is provided with spiral salient [2], the spiral salient [2] of the inner side of cylindrical shell [1] is more than or equal to 4 spirals, the height of spiral salient [2] is more than or equal to 50mm, the spiral salient [2] of outer end one side is more than or equal to 2 spirals, the end face of the other end of discharge nozzle [3] is connected with sieve plate [5], and the sieve aperture of sieve plate [5] is circle or circular arc.