CN202621469U

CN202621469U - Mixed load-type multi-stage grading device

Info

Publication number: CN202621469U
Application number: CN 201220257227
Authority: CN
Inventors: 张再江; 张景杰; 徐蔚涛; 贾文浩; 方华
Original assignee: SHANGHAI XICUN POWDER TECHNOLOGY Co Ltd
Current assignee: SHANGHAI XICUN POWDER TECHNOLOGY Co Ltd
Priority date: 2012-06-01
Filing date: 2012-06-01
Publication date: 2012-12-26
Anticipated expiration: 2022-06-01

Abstract

The utility model provides a mixed load-type multi-stage grading device which comprises a crushing system, a grading machine, a pulse dust remover and a draught fan, wherein the grading machine comprises a vertical grading machine and a horizontal grading machine; the crushing system is connected with the vertical grading machine; the horizontal grading machine is connected with the vertical grading machine and the pulse dust remover; and the draught fan is connected with the pulse dust remover through an air duct. Due to the adoption of the mixed load-type multi-stage grading device, not only is the control to the upper limit of the grain sizes of powder under high concentration completed with the characteristics of low vertical grading linear velocity, large grain sizes of grading and small wear, but also the advantages of high linear velocity and small grain sizes of grading in horizontal grading are fully utilized, the control to the lower limit of the grain sizes is completed, and the required grading precision is realized.

Description

Mixed loading type multi-stage grading device

Technical Field

The utility model relates to an ore reducing mechanism especially relates to an ultramicro reducing mechanism.

Background

In the crushing operation, the finished products with the particle size of 150 to 10 microns or more are generally finished by a mechanical crusher and are subjected to crushing processing operations such as rough crushing, medium crushing, micro crushing and the like, wherein the most important step is a classification processing part.

Classification means a particle size sorting operation of a powder mixed with a particle size, and generally includes vertical classification in which a classification impeller is vertically installed and horizontal classification in which a classification impeller is horizontally installed; multistage means that a plurality of classification units are installed in a system. The vertical grading has the advantages of large treatment capacity, high efficiency and the like, but has the defect of low grading precision; horizontal classification has the advantage of high classification accuracy, but has the disadvantages of low efficiency and small processing capacity.

At present, the multistage grading systems are all assembled in series in a vertical grading manner, but are found in application: because the grading precision of a plurality of vertical graders is the same, narrow distribution products with strict upper and lower particle size limits are difficult to finish, and the grading is often required for a plurality of times, so that a good effect cannot be achieved. In view of this, how to break through this technical problem, solve the problem of the very strict narrow distribution product accurate classification of granularity upper limit, lower limit, be the problem that the utility model discloses need solve.

Disclosure of Invention

There is the defect to hierarchical precision among the prior art, the utility model provides a multistage grading plant of formula of loading in mixture.

According to the utility model discloses, a multistage grading plant of formula of loading in mixture is provided, including smashing the system, the grader, pulse dust collector and draught fan, the grader is the combination of vertical grader and horizontal grader, smashes the system and links to each other with vertical grader, and horizontal grader, pulse dust collector and draught fan are connected gradually to vertical grader.

Preferably, the number of vertical classifiers of the mixed multistage grading device is 1-3, and the number of horizontal classifiers is 1-3;

preferably, the vertical classifiers of the mixed-loading multistage grading device are connected in series, and the horizontal classifiers are also connected in series;

preferably, the vertical classifier of the mixed loading type multi-stage classifier is directly connected with the feeder;

preferably, the inner wall of the classifier of the mixed loading type multi-stage classifier is covered with the ceramic plate.

Adopt the utility model discloses a multistage grading plant of formula of loading in mixture, not only make full use of vertical hierarchical linear velocity low, hierarchical particle diameter is big, the little characteristics of wearing and tearing accomplish the upper limit control of powder granularity under the high concentration, simultaneously in the horizontal classification of back level, the horizontal hierarchical linear velocity of make full use of is high, the little advantage of hierarchical particle diameter accomplishes the lower limit control of granularity to reach required hierarchical precision.

Drawings

Various aspects of the invention will become more apparent after reading the detailed description of the invention with reference to the drawings. Wherein,

FIG. 1 shows a schematic of the structure of a vertical classifier;

FIG. 2 shows a schematic of the structure of a horizontal classifier;

fig. 3 shows a schematic connection diagram of a mixed-loading multistage classifier.

Detailed Description

Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

The utility model discloses a turbine ultramicro classifier, the branch sieve theory of turbine classification wheel is: the balance between the centrifugal force generated by the rotating turbine and the centripetal force created by the air. The upper part of the turbine ultramicro classifier comprises a classification cavity and a multi-blade classification impeller, and the lower part is a secondary sorting device with a secondary air inlet device. Fig. 1 shows a schematic structural diagram of a vertical classifier. Referring to fig. 1, the material to be classified is sucked into the classification cavity 30 by the high-pressure negative pressure suction system under the driving of the classification motor 50, the classification impeller 40 is arranged on the upper part of the classification cavity 30, the material is acted by a strong and powerful centrifugal force field near the volute and the classification impeller 40, the micro powder meeting the requirement is sucked out of the classification impeller 40 and is collected by the collecting device through the discharge port 60, and the coarse material falls down into the classification cavity 30. The bottom of the grading box 30 is provided with a secondary sorting device 20, a secondary air inlet 21 is arranged on the secondary sorting device, coarse materials fall into the grading cavity 30 and are dispersed again under the influence of secondary air inlet, fine powder mixed in the coarse powder enters the sorting area along with air flow again, and the coarse materials fall along the inner wall. Because the turbine and the upper box body adopt the air flow sealing mechanism, the sealing effect is very excellent, and the discharging granularity is more uniform. The best grading effect can be obtained by adjusting the rotating speed of the grading motor 50 and the secondary air intake.

Fig. 2 shows a schematic structural diagram of the horizontal classifier. Fig. 2 is similar to the structure of the classifier of fig. 1, except that the classifying impeller 41 is installed horizontally and the classifying motor 51 is horizontally disposed at one side of the classifying impeller.

The vertical grading has the advantages of large treatment capacity, high efficiency and the like, but has the defect of low grading precision; horizontal classification has the advantage of high classification accuracy, but has the disadvantages of low efficiency and small processing capacity.

Fig. 3 shows a schematic connection diagram of a mixed-loading multistage classifier. Referring to fig. 3, the material is primarily crushed by the feeding machine 70 and enters the vertical classifier 80 to classify the coarse particle size, multiple vertical separators 80 can be connected in series, one separator is adopted in the embodiment, 2-3 separators are adopted in other embodiments, and the effect of the product separated by the classifiers after the series connection is better. The fine powder from which the coarse fraction finished product is separated by the vertical classifier 80 enters the horizontal classifier 90 through a connecting pipeline for classifying with a finer particle size, one horizontal separator 90 is adopted in the embodiment, and 2-3 separators can be adopted in other embodiments. The horizontal classifier 90 is connected with the pulse dust collector 100, fine powder from the horizontal classifier 90 enters the pulse dust collector 100 to be collected, and clean air is discharged through the induced draft fan 110. Adopt the utility model discloses a multi-stage grading plant of mixed loading formula has overcome because the grading precision of many vertical classifiers is the same, be difficult to accomplish the problem to the narrow distribution product that the granularity upper limit, the lower limit is very strict, not only make full use of vertical hierarchical linear velocity low, hierarchical particle diameter is big, the upper limit control of powder granularity under the high concentration is accomplished to the little characteristics of wearing and tearing, simultaneously in the horizontal classification of back level, the horizontal hierarchical linear velocity of make full use of is high, the little advantage of hierarchical particle diameter, accomplish the lower limit control of granularity, thereby reach required grading precision. The grader can adopt a ceramic grading wheel, and the ceramic plates are bonded on the inner wall of the grader, so that materials with higher hardness, such as quartz, can be graded.

Hereinbefore, specific embodiments of the present invention have been described with reference to the accompanying drawings. However, those skilled in the art will appreciate that various modifications and substitutions can be made to the specific embodiments of the present invention without departing from the spirit and scope of the invention. Such modifications and substitutions fall within the scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a multistage grading plant of mixed loading formula, is including smashing the system, the grader, pulse dust collector and draught fan, its characterized in that, the grader is the combination of vertical grader and horizontal grader, smash the system with vertical grader links to each other, vertical grader connects gradually horizontal grader pulse dust collector, and the draught fan.

2. The mixed loading type multistage classifier according to claim 1, wherein the number of the vertical classifiers is 1 to 3, and the number of the horizontal classifiers is 1 to 3.

3. The mixed loading type multistage classifier as claimed in claim 2, wherein the vertical classifiers are connected in series, and the horizontal classifiers are also connected in series.

4. The mixed loading type multistage classifier of claim 1, wherein the vertical classifier is directly connected to the feeder.

5. The hybrid multilevel gradation apparatus of claim 1, wherein the inner wall of the classifier covers a ceramic sheet.