CN2442753Y

CN2442753Y - High-speed airflow multi-stage mill for producing ultra-thin powder

Info

Publication number: CN2442753Y
Application number: CN 00261436
Authority: CN
Inventors: 任良勇; 魏成刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-12-12
Filing date: 2000-12-12
Publication date: 2001-08-15
Anticipated expiration: 2010-12-12

Abstract

The utility model relates to a mechanical breaking and grinding device for super mircofine powder, wherein, at least on turbulent flow disk is coaxially arranged on a main shaft of a grinding cavity; the turbulent flow disk is formed by that both sides of a wheel disk are provided with vanes with the same rotating direction; a discharge port of the grinding cavity is connected with an airflow crushing chamber via a discharge pipe; the upper part of the airflow crushing chamber is connected with a separating chamber which is connected with at leat one stages of cyclone recovering hopper and a dust-removing powder collecting hopper which is connected with a draught fan. The utility model has the advantages of low energy consumption, large yeild and low loss; effective grinding ratio can reach 65 percents above; the fineness of products can reach 0.1 microns.

Description

High-speed air flow multi-stage ultrafine powder mill

The utility model relates to a kind of super-fine powder processing mechanical apparatus.

Powder industry is an important basic material industry, and the powder preparation technology is occupied critical role in chemical industry and material industry.In fact, human understanding and application for powder long ago just begins.Powder technology was grown up by the pottery preparation gradually from ancient times, and had stimulated the generation of the industrial revolution and chemical industry.Nineteen forty-three, the J.M.Dallavalle of the U.S. has published " micromeritis, particulate technology ", and anti-first powder preparation and application etc. are summarized in together.De Guo people such as Hans Rumpf classify to powder preparation subsequently, and physical chemistry and chemical thermodynamics are got involved the powder preparation process, have established the basis of powder technology development.

The eighties in 20th century, superfines grows up gradually, becomes the emphasis of various countries' research day by day.So-called superfines is meant yardstick between molecule, atom and bulk material, makes a general reference the small solid particle in the 1-100nm scope usually.Comprise multiple granular materials such as metal, nonmetal, organic and inorganic and biology.Ultra-fineization along with material, its surface electronic structure and crystal structure change, produced the skin effect that bulk material did not have, small-size effect, quantum effect and macro quanta tunnel effect, thereby the superfines of making and conventional granulates material compared have physics, the chemical property of a series of excellences.The good characteristic of superfines makes it to have showed wide application prospect as a kind of new material in fields such as aerospace, electronics, metallurgy, chemistry, biology and medical science.The product that with the powder is raw material in fine chemistry industry and field of new accounts for 50%, the powder stock cost accounts for the 30%-60% of totle drilling cost: according to statistics in U.S. Dupont company 1985 and 1992 3000 multiple products 62% be with powder or based on its product, its chemical industry 40% increment derives from the progress of micronizing.The superfines production technology has become traditional chemical industries such as transforming paint, coating, washing agent, cosmetics, the basis of impelling new industry development such as information recording carrier, fine ceramics, electronic technology.

But along with the fast development of the application of superfine powder, the bottleneck problem of restriction superfine powder application and development will be more and more outstanding.

The preparation of superfines comprises the synthetic gentle several different methods such as be combined to of mechanical crushing, liquid phase.

Wherein the exploitation main points of mechanical crushing are: improve effectively pulverize can, utilize mostly impact, cut cut, the comprehensive function of mechanical force such as friction carries out ultra-fine grinding.Main disintegrating apparatus has: (1) high speed machine impact type atomizer: (2) airslide disintegrating mill; (3) roller press type grinding machine; (4) medium motion formula grinding machine.

High speed machine impact type atomizer is to utilize the epitrochanterian hammer of high speed rotary, blade, excellent part etc. that material is clashed into, and the equipment that it is pulverized in the mutual powerful impact that produces high frequency between rotor and stator, between material particles and particle, shear action.Its technological process is to be subjected to the impact shear pulverizing by the material of batcher feeding pulverizing chamber between the stator of the rotor of high speed rotary and band tooth lining; Enter graded region then under the drive of air-flow, micro mist is crossed outside the classification worm gear discharge machine with air communication, is captured by dust-precipitator, and meal is pulverized in revolution is fallen in the gravity effect once more.

Airslide disintegrating mill is the energy that utilizes high velocity air (300-500m/s) or superheated steam (300-400 ℃), makes particle impact mutually, collision friction and pulverizes, and air-flow also drives pulverized particles and enters graded region and carry out after the classification outside the discharge machine simultaneously.

The roller press type grinding machine is to utilize a pair of roller of rotation in opposite directions that material is squeezed into the strip fritter, becomes thin product through separating after broken again.

Medium motion formula grinding machine is to utilize to add vibration or mixing power or medium material is ground.

It is little that the existing machinery disintegrating apparatus exists all that processing output is low, energy consumption greatly, is effectively pulverized merit, and the material feeding hardness that is suitable for is little, the shortcoming that product fineness is big.

The purpose of this utility model is that a kind of energy consumption is little in order to provide, output greatly, is effectively pulverized the high-speed air flow multi-stage super-fine powder mill that merit is big, product fineness is thin, loss is little.

The purpose of this utility model can realize by following measure:

A kind of high-speed air flow multi-stage ultrafine powder mill comprises Power Drive Unit, main shaft, mill chamber and fine powder retracting device etc.; Be coaxially installed with at least one turbulent flow dish on the main shaft of mill chamber, the turbulent flow dish is equipped with the blade of rotation direction by the wheel disc both sides to be made; The discharging opening of mill chamber links to each other with the air-flow pulverizing chamber by discharge nozzle, and the top of air-flow pulverizing chamber links to each other with the separation chamber, and the separation chamber is with one-level whirlwind recovery hopper is continuous with the dedusting receipts powder bucket that links to each other with air-introduced machine at least.

The utility model has following advantage compared to existing technology:

1, the utility model adopts when one-level turbulent flow dish rotates in cavity at least, in cavity, produce airflow and form high turbulence, high turbulence forms the high turbulence band on the wheel limit of turbulent flow dish, this turbulent flow band can make that material clashes at a high speed, autogenous grinding is pulverized, thus the high turbulence that forms by the turbulent flow dish also the discharge nozzle by mill chamber forms the high velocity jet air-flow and makes material also separated by pulverizing once more in the air-flow pulverizing chamber; Thereby the utilization rate of turbulent flow of the present utility model reaches the highest, and the efficient of turbulent flow reaches the highest efficient relatively, and effective pulverizing merit of the present utility model can reach more than 65% greatly, output is high thereby make.

2, the utility model can make the blade of turbulent flow dish be in not state of wear basically owing to be provided with fixedly guide vane and be coaxially installed with inertia accent wind wheel on main shaft at the mill chamber sidewall, and its loss is very little.

4, the utility model generation high turbulence has moment of inertia, can produce inertia torque to main shaft, thereby it is minimum that energy loss is reduced to, and can save the power of Power Drive Unit greatly; And it also is that the high velocity air that utilizes turbulent flow to produce is pulverized that the secondary of material is pulverized, and air-flow need not the secondary energy supply when pulverizing, therefore capacity usage ratio maximum of the present utility model in the grinding machine with Isoquant.

5, the utility model is because effectively to pulverize merit big, thereby it can break the various materials of mill Mohs' hardness 1-10 level, and the fineness of the powder of its processing carefully can reach tens nanometers to 100 micron, and raw meal particle size of its broken mill is thin, D ₉₇Reach below the 2 μ m, and the specific area of material is big.

6, utility model is owing to utilize turbulent flow and air-flow autogenous grinding processing comminuting matter, and coarse granule refluxes and pulverized again after the feed separation; Thereby the grain shape of powder is good, uniformity height, narrow particle size distribution, purity height, active big.

Concrete structure of the present utility model is provided by the following drawings:

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

1-Power Drive Unit 2-main shaft 3-is guide vane 4-turbulent flow dish fixedly

5-mill chamber 6-transfers the floating fish 7-air-flow pulverizing chamber 8-separation chamber of stream

Tube cell 11-fine powder pipe 12-whirlwind reclaims hopper among the 9-meal pipe 10-

Powder bucket 14-air-introduced machine 15-charging gear is received in the 13-dedusting

16-pressure modulating opening 17-discharge nozzle 18-return duct 19-inertia is transferred wind wheel

Fig. 2 is a turbulent flow dish structural representation of the present utility model

20-wheel disc 21-blade

Fig. 3 is the vertical view of turbulent flow dish of the present utility model

Fig. 4 is an air-flow pulverizing chamber structural representation of the present utility model

The 22-nozzle

The utility model is also incited somebody to action in conjunction with the accompanying drawings, and embodiment is described in further detail:

With reference to Fig. 1, a kind of high-speed air flow multi-stage ultrafine powder mill comprises Power Drive Unit 1, main shaft 2, mill chamber 5 and fine powder retracting device, charging gear 15 etc.; Described Power Drive Unit 1 is a frequency control motor; Described charging gear 15 is the autofeed device, and autofeed device 15 vertical turbulence dishes 4 link to each other with mill chamber 5; Be coaxially installed with two turbulent flow dishes 4 on the main shaft 2 of mill chamber 5, turbulent flow dish 4 is equipped with the blade 21 of rotation direction by wheel disc 20 both sides to be made; With reference to Fig. 2,3, the blade 21 of turbulent flow dish 4 is two arcs, and blade 21 is the inclined-plane by main shaft 2 places, and the axis angle of its inclined-plane and main shaft 2 is 20-39.5 °; The discharging opening of mill chamber 5 links to each other with air-flow pulverizing chamber 7 by discharge nozzle 17, is provided with to transfer the floating fish 6 of stream in the discharge nozzle 17 of mill chamber 5; The top of air-flow pulverizing chamber 7 links to each other with separation chamber 8, and separation chamber 8 reclaims hopper 12 and the dedusting that links to each other with air-introduced machine 14 by fine powder pipe 11 and one-level whirlwind at least, and to receive powder bucket 13 continuous; In separation chamber 8, also be connected with meal pipe 9, middle tube cell 10; The charging aperture that 8 bottoms are provided with return duct 18 and mill chamber 5 in the separation chamber links; Be provided with pressure modulating opening 16 in the bottom of mill chamber 5 in addition.

With reference to Fig. 4, air-flow pulverizing chamber 7 is provided with high velocity air nozzle 22 with mill chamber 5 discharge nozzles 17 connecting places.

Embodiment 2, are provided with fixedly guide vane 3 at mill chamber 5 sidewalls of the foregoing description over against turbulent flow dish 4 blades 21 places.

Embodiment 3, be coaxially installed with inertia and transfer wind wheel 19 between two turbulent flow dishes 4 of the mill chamber 5 of the foregoing description.

Claims

1, a kind of high-speed air flow multi-stage ultrafine powder mill comprises Power Drive Unit (1), main shaft (2), mill chamber (5) and fine powder retracting device etc.; It is characterized in that being coaxially installed with at least one turbulent flow dish (4) on the main shaft (2) of mill chamber (5), the blade (21) that turbulent flow dish (4) is equipped with rotation direction by wheel disc (20) both sides is made; The discharging opening of mill chamber (5) links to each other with air-flow pulverizing chamber (7) by discharge nozzle (17), the top of air-flow pulverizing chamber (7) links to each other with separation chamber (8), and separation chamber (8) are with one-level whirlwind recovery hopper (12) is continuous with the dedusting receipts powder buckets (13) that link to each other with air-introduced machine (14) at least.

2, high-speed air flow multi-stage ultrafine powder mill as claimed in claim 1 is characterized in that the blade (21) of described turbulent flow dish (4) is two arcs, and blade (21) locates to be the inclined-plane by main shaft (2), and the axis angle of its inclined-plane and main shaft (2) is 20-39.5 °.

3, high-speed air flow multi-stage ultrafine powder mill as claimed in claim 1 is characterized in that locating to be provided with fixedly guide vane (3) at mill chamber (5) sidewall over against turbulent flow dish (4) blade (21).

4, high-speed air flow multi-stage ultrafine powder mill as claimed in claim 1 is characterized in that being coaxially installed with inertia and transfers wind wheel (19) between two turbulent flow dishes (4) of mill chamber (5).

5, high-speed air flow multi-stage ultrafine powder mill as claimed in claim 1 is characterized in that being provided with in the discharge nozzle (17) of mill chamber (5) and transfers stream to float fish (6).

6, high-speed air flow multi-stage ultrafine powder mill as claimed in claim 1 is characterized in that being provided with pressure modulating opening (16) in the bottom of mill chamber (5).

7, high-speed air flow multi-stage ultrafine powder mill as claimed in claim 1 is characterized in that the charging aperture that is provided with return duct (18) and mill chamber (5) in the separation chamber bottom (8) links.

8, high-speed air flow multi-stage ultrafine powder mill as claimed in claim 1 is characterized in that also being connected with meal pipe (9), middle tube cell (10) on separation chamber (8).