CN87106650A

CN87106650A - Wet vibrating grader

Info

Publication number: CN87106650A
Application number: CN87106650.5A
Authority: CN
Inventors: 平林利康; 穴用信二
Original assignee: JGC Corp
Current assignee: JGC Corp
Priority date: 1986-09-26
Filing date: 1987-09-24
Publication date: 1988-04-06
Also published as: CN1009621B; JPH0557027B2; JPS6384654A

Abstract

Powder particle is supplied with on wire netting and so on sieve with the water slurry shape in the damp process vibrating grader, and sieve is sprayed at the water of necessary amount while vibrating and carries out classification above the sieve, sorts.Characteristics are that the upper side on inclined plane is by the mesh screen that is made into more than a section, lower side is made up of the slotted screen more than a section, the sieve of each section to pass through particle diameter identical, percent opening is hypomere littler than the epimere then, by speed the particle on the sieve do not carried out atomic the separation with the atomic liquid that matches by the speed of sieve of filtrate with luming.Filter efficiency is improved, and the auxiliary water yield reduces, and the particulate after the filtration is moisture few, and compass screen surface is long-pending to be dwindled, and remnant is discharged stable.

Description

The present invention about the classification of powder particles such as ore, clay, coal, sort the wet vibrating grader of usefulness.

The damp process vibrating grader is that powder particle is made water slurry basically, supplies on the mesh screen of wire netting and so on, make mesh screen vibration time, corresponding needed water is sprayed at carry out classification on the mesh screen, sort.Like this, prevent the cohesion of the powder on mesh screen, effectiveness of classification is improved, and avoided dispersing of powder particle.

But the such mesh screen that is made into of wire netting is its percent opening height in general, treating capacity is many, shortcoming is the result that the moisture of water slurry is emitted under the mesh screen in large quantities hastily, particulate blocks and the piece of generation particle on mesh screen, the particulate of piece inside descends filter efficiency owing to can not separate.Also have, the piece of the particle of generation is stagnated on mesh screen and the effective area of mesh screen is reduced, and the discharge of the remaining particle on the mesh screen also becomes irregular.

For fear of this phenomenon, just need on mesh screen, spray water more, the piece of particle is disperseed, but its result cause the atomic moisture that contains after separating, the i.e. increase of moisture content off the net.

With a plurality of by particle diameter identical in fact but the different mesh screen that is made into of percent opening make up and attempt to address this problem, can not get satisfied result.

The invention provides a kind of wet vibrating grader, solved above-mentioned such obstacle, liquid is matched by mesh screen speed by speed and filtration back the atomic of material, suppress the generation of the piece of the particle on the mesh screen, particulate is separated, do not increase the moisture in the particulate under the mesh screen, remaining on the mesh screen discharged particle-stabilisedly, effectiveness of classification and classifying capability are improved.

The design feature of wet vibrating grader of the present invention is that the upper side on the inclined plane disposes the mesh screen that is made into more than a section, at the slotted screen of lower side configuration more than one section, the particle diameter that passes through of the mesh screen of each section comes down to identical, simultaneously, its percent opening is that the mesh screen of hypomere is little than the mesh screen of epimere.Also have, the mesh screen of hypomere is preferably installed and can be adjusted to angle of inclination arbitrarily.

The percent opening of the general commercial goods of mesh screen that is made into that wire netting is such from 20-70% suitable be chosen as good.

Slotted screen is to be provided with the shaped hole that casting mold casts out or the non-sieve that is made into of punching hole, be metal, synthetic resin or synthetic rubber system, polyurethane resin system commercial goods for example, foursquare hole, rectangular hole, circular hole etc. have, percent opening is low, usually 6-20%.

Several characteristic and the classification purposes etc. according to handled particle of the mesh screen that uses, each decision at random more than one of mesh screen that is made into and slotted screen, yet the combination of adopting each 2-3 to open usually.

In addition, the formation of the percent opening of each mesh screen is that the mesh screen of hypomere diminishes in turn than the mesh screen of epimere.Also have, the mesh screen of hypomere is preferably installed and can be adjusted to angle of inclination arbitrarily, particularly big angle of inclination.

Use embodiment (be not be used for limiting of the present invention) to come the present invention is made specific description with reference to the accompanying drawings, wherein:

Fig. 1 is the side view that the formation of wet vibrating grader of the present invention is schematically shown,

Fig. 2 is the plane of Fig. 1,

Fig. 3 is with the wet vibrating grader that has earlier of the wire netting that has earlier and the filter efficiency figure of wet vibrating grader of the present invention.

In illustrated embodiment, the upper side on the inclined plane is disposing the mesh screen 11 that is made into and 12 2 sections, is disposing slotted

screen

13 and 14 2 sections in lower side, and the sieve 14 of hypomere installing by hinge 2, can be adjusted to arbitrarily angle of inclination.

The mesh screen 11 that is made into 12 and slotted

screen

13 and 14 are combinations by the in fact identical article of particle diameter. Preferably decide according to the classification purpose of processing raw material by particle diameter.

Make when in fact identical by particle diameter, at the mesh screen that is made into oh, during the occasion of the slotted screen of square hole, circular hole, the aperture is identical, during the occasion of the slotted screen of slot, can be short that The limit is hanked identical as benchmark and aperture.

In use the occasion of the slotted screen in rectangular hole is arranged, the minor face in rectangular hole and powder water slurry stream are harmonious like that, and namely long limit is to dispose sidewards.

The formation of the percent opening that respectively sieves in addition, is that the sieve of the sieve ratio epimere of hypomere reduces in turn.

In the occasion that Fig. 1 and Fig. 2 make up like that, its formation is that the aperture opening ratio of for example mesh screen that is made into 11 of epimere is 60%, the aperture opening ratio of the mesh screen that is made into 12 of next section is 20%, and the aperture opening ratio of the slotted screen 13 of next section is 10%, and the aperture opening ratio of the slotted screen 14 of hypomere is 6%.

The structure of the sieve of each section and the relativeness of aperture opening ratio are seen shown in the example below Fig. 2.

From the flow direction of raw material water slurry, the relative length of the sieve of each section from identical scope to about 2 times, get be decided to be good.

The length of the sieve of particular segment is made more than 2 times of length of the sieve of other sections, still this section further is divided into two sections, make good that percent opening can change.

The angle of inclination (θ 1 of Fig. 1) of sieve can freely be selected, but preferably is set in usually in the 15-20 degree scope.

The angle of inclination (θ 1) of the sieve of therefore hypomere and the section of top as irrelevant ground arbitrarily angle of inclination (θ 2 of Fig. 1) all right, particularly the angle of inclination can be done the earth adjustable ground and installed.Its reason is that the sieve of terminal section is simultaneously being kept the function as sieve, for remaining object on sieving is discharged (falling) easily, must tilt.

As the means of carrying vibration to sieve, available eccentric drive mechanism input circular vibration.This occasion, amplitude frequency and so on can both freely be selected.

Also have,, be preferably in sieve and go up configuration sprinkling nozzle 3 for auxiliary water can be sprayed out by suitable necessary place.

Describe with Fig. 1 and Fig. 2, the stoste that contains powder particle of water slurry shape, supply with continuously on the mesh screen that is made into 11 of percent opening 60% earlier from supply port 4, at this, water in the stoste and an atomic part are sized to come and drop to the below, remaining water and powder particle continue to move on the mesh screen that is made into 12 of percent opening 20%, also have a water and an atomic part to be sized to come at this and fall downwards.

Remaining water and powder particle continue to move on the slotted screen 13 of percent opening 10%, more have a water and an atomic part to be sized to come at this and fall downwards.

The water slurry that the water of remnants on the slotted screen 13 and powder particle form continues to move to the slotted screen 14 of percent opening 6%.

The percent opening of sieve is not the occasion that diminishes in turn, for example, percent opening is under 60% the situation, water from the stoste that supply port 4 supplies come is below almost major part drops to before the arrival here, generate the piece that blocks the particle that forms by particulate on the sieve of hypomere, the particulate of piece inside produces the phenomenon of not falling under the sieve, and mesh screen and slotted screen that the such handle of the present invention is made into combine, the percent opening of the sieve of the sieve ratio epimere of hypomere is to diminish in turn to constitute like this, water on the sieve of hypomere in the stoste also can arrive, therefore avoided the generation of the piece of particle, particulate also can be sized on the sieve of hypomere.

The moisture that arrives herein is quite few, water slurry flows and becomes difficult, but the slotted screen 14 of hypomere is installed to be adjusted to angle of inclination arbitrarily, by the inclination angle of slotted screen 14 is suitably regulated, water slurry does not flow down on sieve stagnantly, in addition, particulate is sized out when sieve falls down, and the remaining object being treated that moisture has reduced stably is discharged from unchangeably.

Also have, because the variation of proterties of stoste and so on, atomic generation often neither be said impossible, so spray processing with suitable auxiliary water by spraying nozzle 3 in the incidental place of piece.

Embodiment 1

The water slurry of the particle of using the chippy coal of pulverizer, the aperture that only is used as the mesh screen that is made into is 150 μ m * 150 μ m, the wet vibrating grader of the wire netting of percent opening 37% (second: device is arranged earlier), with half of the upper side of same device with identical wire netting, half of lower side aperture 150 μ m * 7mm, wet vibrating grader (the first: apparatus of the present invention) of the slotted screen combination of the polyurethane resin system of percent opening 7%, auxiliary water with necessary amount sprays separately, and the filter efficiency when carrying out classification is shown in Fig. 3.

The longitudinal axis is filter efficiency η among Fig. 3, and transverse axis is load (ton/time/rice ²), the containing ratio of raw material, the particle of holding the following diameter in aperture after filtering, on the sieve respectively represents that with f, p, r filter efficiency η is

η＝ (p（f-r）)/(f（p-r）)

When being thought of as the particle after filtering all than the little occasion in aperture, P is 1,

η＝ (（f-r）)/(f（1-r）)

As shown in Figure 3, the occasion that wire netting (mesh screen that is made into) and slotted screen are used in combination, its filter filter efficient (A-wire) when load becomes big than only the filter efficiency (second line) with the occasion of wire netting is significantly superior.

Also have, use the occasion of device of the present invention, the necessary auxiliary water yield has also been saved 30-50%.

Effect of the present invention is as follows:

(1) improved filter efficiency.

(2) auxiliary water reduces.

(3) can obtain particulate after the few filtration of moisture content.

(4) owing to the raising of filter efficiency, required compass screen surface is amassed reduce.

(5) remaining handled thing can stably be discharged unchangeably.

Claims

1, a kind of wet vibrating grader, it is characterized by upper side and disposing the mesh screen that is made into more than one section on the inclined plane, disposing slotted screen more than one section in lower side, the particle diameter that passes through of the sieve of each section comes down to identically, and its percent opening is that the sieve of the sieve ratio epimere of hypomere is little simultaneously.

2, as the wet vibrating grader in the claim 1, the sieve that it is characterized by hypomere is dressed up may be adjusted to angle of inclination arbitrarily.