CN2236892Y

CN2236892Y - Multiple stage crushing and stage mill

Info

Publication number: CN2236892Y
Application number: CN 95202046
Authority: CN
Inventors: 夏光健; 蔡晓津; 张忠泽
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-01-23
Filing date: 1995-01-23
Publication date: 1996-10-09
Anticipated expiration: 2005-01-23

Abstract

The utility model relates to a multiple stage crushing and grading mill which is a closed-loop system that is composed of a drive motor, an arm tilting hammer blower, a plane grader, a disk hammer blower, a wheel basket type grader, a cyclone separator, a ventilator and an air channel. The closed-loop system has the functions of first level crushing, coarse grading, second level crushing, fine grading and product collecting that once complete the crushing course from ores to superfine powder. Since scientifically utilizing the comprehensive effects of hammer blowing, colliding and self-sharpening, the utility model has high efficiency and low energy dissipation.

Description

Multistage pulverizing and classification grinding machine

The utility model relates to ore to be pulverized, particularly a kind of equipment of ultramicro grinding.

In comminution process, the finished product that present 150～10 micron granularities are above is all finished by the mechanical type pulverizer, the front through thick broken, in broken, little broken all procedures, each procedure uses corresponding apparatus.As Hubei Province formula, gyratory crusher etc., can be crushed to 100～10 mm particle sizes; Roll-type, hammer mill can be crushed to the granularity below 10～5 millimeters; Ball mill, Raymond mill, high speed hammer, cintrifugal disintegrator etc. can be crushed to below 150 microns.And to obtain the ultrafine powder of 10 microns following granularities, more advanced, then mostly is to adopt airslide disintegrating mill.Airslide disintegrating mill can make the finished product granularity of processing about 5 microns, even littler, and when pulverizing, particle can carry out classification by its size voluntarily in air-flow.But, it is the huge kinetic energy that high velocity air bred that utilizes gases at high pressure to produce by nozzle that air-flow is pulverized, make material particles generation impact, or reach broken with the shock plate impact, thereby, consumption of energy is big inevitably for it, pulverizes the cost height, and requires a series of supporting optional equipments.In addition, the gas pulverizer has higher restriction to feed size, in other words, must as if in miscellaneous equipment with material precomminution after the granularity of regulation, could reprocess by airslide disintegrating mill, thereby reach the degree of ultra micro.In general, the finished product granularity that obtain is more little, and the operation of process is just many more.This multiple working procedure, the processing of multiple fractionation makes the hold facility amount big, material cycling often, thereby the waste that causes is big, also consumes the worker simultaneously in large quantities.People seeking always a kind of can some equipment just directly obtain the technology of ultrafine powder without the centre with tcrude ore.CN2122687U is disclosed, and name is called the utility model of " the broken centrifugal autogenous tumbling mill of formula whirlwind of vertical shaft hammer ", has made such trial.This equipment mainly is made up of drive motors, vertical shaft, conical surface dish, hammering plate, ore grinding tube, blower fan and air channel.In the described ore grinding tube, drive motors horizontally rotates through the vertical shaft drive conical surface dish of positioned vertical, on conical surface dish, evenly settles several hammering plates, and the air channel is communicated with wind pillow and ore grinding tube.The inventor of this utility model thinks, its practical novel operation principle is: after bulk materials enters the ore grinding tube, at first be subjected to the bump of the hammering plate of high-speed motion, and then be splashed to an inwall again and be subjected to bump for the second time, realized middle fragmentation and little fragmentation of material.Material after the fragmentation is done the spiral ascending motion with great kinetic energy along the tube inwall, produce autogenous grinding between the material, a wherein bigger material movement velocity constantly decays, under the promotion that rises material on the bottom, leave barrel, when dropping down onto conical surface dish, being impacted is thrown out of once more, so moves in circles until wearing into than granule, leaches qualified products from powder concentrator then under the effect of high velocity air.More than narrate as can be seen, this utility model can be simplified the grinding process flow process, broken, little broken and ore grinding in disposable the finishing.But practical result shows, the product that this utility model is produced, at sieving rate is 80% o'clock, and minimum particle size but can only reach 44 microns, and granularity rank broad, though than 150 micron granularities very big breakthrough has been arranged, still, has still failed to produce the product of the ultrafine powder of 10 microns following granularities.This be because, the structure of this equipment only has this grindability.In addition, since this machine ore grinding tube lower horizontal be mounted with one with its diameter circular cone dish about the same, after bulk materials is pulverized by the hammering plate of high-speed motion on conical surface dish bump, (this is because the obstruct of conical surface dish to have filled up narrow space between circular cone dish and the cylindrical shell soon, following particle can not be taken away by the high speed whirlwind in the tube), so, just cause: 1, often occur stuck in the work; When 2, involuntary stoppage was restarted after (as having a power failure), motor was in overload, starting difficulty; 3, to make motor energy normal starting, usually the particle that fills up will be drawn out, and this place be narrow, draws to dig very difficulty; 4, a kind of material of every replacing all must take very big strength and go to remove once; 5, owing to the friction of big damping, conical surface dish assembly is fragile, and every replacing is once pretty troublesome.These are because the fault that structure caused is again the unsatisfactory place of this utility model.

The purpose of this utility model is that a kind of broken disposable separate unit mechanical type disintegrating apparatus of finishing from the ore to the ultrafine powder will be provided.

The utility model is a multistage pulverizing and classification grinding machine, have drive motors 1, stick up arm hammer 2, plane clasfficiator 3, disk hammer 4, cradle stye grader 5, cyclone separator 6, air channel 7, blower fan 8, housing 9, their constitute one and have the closed-loop system that one-level pulverizing chamber, rough classification, secondary pulverizing chamber, subfractionation, product are collected.In the one-level pulverizing chamber 10, stick up arm hammer 2 and be vertically set on its bottom, drive motors 1 drives its rotation by driving member, plane clasfficiator 3 is between one-level pulverizing chamber 10 and secondary pulverizing chamber 11, secondary is pulverized indoor, disc type hammer 4 is horizontally set on the plane clasfficiator 3, link to each other with drive motors 1 by driving member, on the top board in disk hammer 4 sky, hang cradle stye grader 5, its rotor is driven by motor 1, at its discharge gate place, connect cyclone separator 6, from the air channel 7 UNICOM's one-level pulverizing chamber 10 and cyclone separator 6 that blower fan 8 is extended.

Below in conjunction with accompanying drawing, with an embodiment have a talk structure of the present utility model and operation principle.

Open charging aperture 12 on the wall on one-level pulverizing chamber 10 tops, bottom vertical is provided with one and sticks up arm hammer 2, at charging aperture 12 and stick up on the casing between the arm hammer 2 tangent air inlet 13 evenly is set, drive motors 1 drives and sticks up 2 rotations of arm hammer, rotating speed can obtain by frequency conversion according to the hardness of processing materials, proportion etc.Stick up the tup on the arm hammer 2, can or pulverize needed different hardness and change according to its damaged condition; Stick up between the arm and to be neutral, even add dowel, its density also will with not can to its down material play and stop and be advisable.Plane clasfficiator 3 (for example adopting 325 purpose horizontal screens) is arranged at the top of one-level pulverizing chamber 10, also constitutes the separate layer with secondary pulverizing chamber 11 simultaneously.In the secondary pulverizing chamber 11, disc type hammer 4 is horizontally set on the central authorities of plane clasfficiator 3, it is to be made of the tup that some handles are distributed on the disk, tup has 20～30 degree inclination angles, rotation is to constituting a parabola that makes progress with disk is common, and maximum cylindrical is about the same with the diameter of casing 9 on every side.Disk hammer 4 is driven by motor 1 by major axis.Cradle stye grader 5 is installed on the top board in disc type hammer 4 sky, and its feed end is closed in the pulverizing chamber, and exhaust end and cyclone separator 6 link, and is driven by motor 1, and can obtain different rotating speeds by frequency conversion.Blower fan 8 forms systemic circulation through cyclone separator 6 at last by air inlet 13 air-supplies of air channel 7 to one-level pulverizing chamber 10.

Operation principle of the present utility model is, bulk materials (ore) enters in the one-level pulverizing chamber from charging aperture, at first be subjected to the tup bump of high-speed motion, simultaneously because the high pressure draught that annular is sent into makes material upwards dish out along helix, under certain speed, the size material forms the fluidized material post of certain altitude, because the acceleration that differs from one another aloft bumps each other, rubs, and has realized thick, middle fragmentation and little fragmentation.Fine grained after the fragmentation is under the attraction of the powerful air-flow that makes progress, and through the plane clasfficiator, rough classification enters the secondary pulverizing chamber; Thicker particle is slowed down by the plane clasfficiator and falls behind down, is stuck up the arm hammer to throw once more, repeats above-mentioned motion, moves in circles, and enters the secondary pulverizing chamber up to wearing into than fine grained.Because the effect of eddy current below the disc type hammer, many by high speed rotating on the very fast arrival disk of the material that enters, further refinement tup pulverizing once more, upthrow, autogenous grinding.Under the updraft effect, material enters graded region through cradle stye grader bullet, reaches the powder of ultra micro fineness, and the gap between blade upwards enters cyclone separator, carries out the collection of qualified products; The particle that does not reach ultra micro is strikeed back by blade, is subjected to the collision of housing then again, and the still bigger disk that falls into repeats hammering, upthrow, autogenous grinding process, until finally entering grader.The screening precision of ultra micro granularity guarantees by regulating wheel basket rotor speed.Open an air inlet 14 on the housing between disc type hammer and the wheel basket grader, allow air flow enter in the machine through this mouthful, flow through the coarse-grained material of whereabouts, and the particulate that it is mingled with is told, upwards dispatch is to improve classification efficiency.

The utility model is with simple structure, the disposable processing of finishing from the ore to the ultrafine powder, the ratio of reduction is great, efficient is high, and product granularity at 10 microns to assign 97%; Owing to scientifically utilized the comprehensive effect of hammering, collision, autogenous grinding, made the equipment power consumption few, low production cost; Be equipped with the wideband speed governing, processing object is wide, and energy-conservation.

Claims

1, a kind of multistage pulverizing and classification grinding machine, has drive motors 1, stick up arm hammer 2, plane clasfficiator 3, disk hammer 4, cradle stye grader 5, cyclone separator 6, air channel 7, blower fan 8, housing 9, it is characterized in that, they constitute one and have the one-level pulverizing chamber, rough classification, the secondary pulverizing chamber, subfractionation, the closed-loop system that product is collected, in the one-level pulverizing chamber 10, stick up arm hammer 2 and be vertically set on its bottom, drive motors 1 drives its rotation by driving member, plane clasfficiator 3 is between one-level pulverizing chamber 10 and secondary pulverizing chamber 11, secondary is pulverized indoor, disc type hammer 4 is horizontally set on the plane clasfficiator 3, link to each other with drive motors 1 by driving member, on the top board in disk hammer 4 sky, hang cradle stye classification pillow 5, its rotor is driven by motor 1, at its discharge gate place, connect cyclone separator 6, from the air channel 7 UNICOM's one-level pulverizing chamber 10 and cyclone separator 6 that blower fan 8 is extended.

2, according to the multistage pulverizing and the classification grinding machine of claim 1, it is characterized in that, describedly stick up sticking up between the arm of arm hammer 2 and be neutral.