CN103721831A

CN103721831A - Powder concentrating device in dry ball mill

Info

Publication number: CN103721831A
Application number: CN201310300085.0A
Authority: CN
Inventors: 孙世林
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-07-12
Filing date: 2013-07-12
Publication date: 2014-04-16

Abstract

The invention provides a powder concentrating device in a mill of a dry ball mill. Separation is carried out in a way that a finished-product material can be timely concentrated from a first chamber section in the dry ball mill and from a mill tail by wind force and can be conveyed to all stages of dust collectors at the top of a storage warehouse through a finished product conveying pipe in an absorbing way. In an inner cavity of the dry ball mill, a powder concentrating pipe of the first chamber is connected with a powder concentrating connecting pipe 1 and a powder concentrating connecting pipe 2 in parallel. The finished-product material which is formed by powder milling at any time is concentrated and conveyed to the all stages of dust collectors through the finished product conveying pipe in an absorbing way, the separated finished-product material is classified or mixed and then unloaded into a finished product warehouse, purified air passes a silenced air duct, a blower, an air return pipe and a mill tail separating chamber, a semi-finished product which is discharged out of the mill is returned to the front part of a second chamber in the mill through a return pipe and a return outlet pipe to be milled, the rest air is discharged by a silencer, and dust which is produced by feeding equipment is brought into the mill through negative-pressure air at an inlet of the mill. Dust collecting equipment of a feeding system is omitted, electric eyes are arranged at the outer side of a power concentrating branch pipe of the first chamber and one end of an electric eye conduit, and the history that no electric eyes are arranged in the ball mill is changed.

Description

Powder selection device in mill of dry method ball mill

Affiliated technical field

Patent of the present invention relates to the dry method powder selection device of a kind of full closed type dry method ball mill grinding building materials, chemical products, the finished product that especially material can be formed at any time in grinding process in time, mill tail separation bin interior from grinding is directly selected, the isolated semi-product material of mill tail separation bin is returned and is sucked back two front portions, storehouse in mill by feed back pipe, continues to participate in the full closed type powder selection device in mill of dry method ball mill of grinding.

Background technology

At present, crowd knows dry method ball mill is closed circuit to be selected powder technology to join by feed system, ball mill, lifting means, powder concentrator, finished product elevator, semi-finished product feed back conveyer material circle the mill forming to select powder system and feed inlet of globe mill, inner chamber, discharging opening, blast pipe, deduster, air blast to be connected into outward to impel the air bypass system that in mill, material moves to mill tail speed to form.The material that is arrived certain particle size by grinding in mill is under the effect of air blast draft, driven by air-flow constantly mobile to the outlet of mill tail, after drawing off, by lifting means, be delivered to powder concentrator, finished product after separation is delivered to powdery finished product storage vault by finished product elevator, semi-finished product, irony and the large granular materials of thick material are delivered to bistrique feeding bin by elevator and feed back conveyer, and newly add material and synchronize after entering grinding machine and carry out grinding again; The fine powder that the air draft of mill tail is taken away is separated by the fiber bag precipitator trapping in air bypass system, and the material after separation is delivered to powdery finished product storage vault by lifting means, and the air after purification enters atmosphere through air blast.Like this, can partly avoid grinding " crossing grinding phenomenon " of interior material, alleviate grinding load, improve output and the product quality of ball mill, reduce power consumption, abrasion.But, the closed circuit choosing in powder system of dry method ball mill of practical application now, what air-flow and material presented after flowing out and grinding is operation along separate routes, air stream is failed to realize circle and is flowed, and runs, leaks grey point source many, is difficult to reach the requirement that environmental protection is administered comprehensively; Finished product select powder equipment complex structure, operating difficulties; The auxiliary device using in system is many, and one-time investment is large; Management and maintenance expense and operating cost are high; The finished product generating in mill is difficult to all select in time mill, does not fully solve veritably " crossing grinding phenomenon " of material in mill, and quality of the present invention is also very undesirable relatively, and power consumption, abrasion are also aobvious high; For high yield, the Super-fine grinder technology of recent year, outer exploitation, in mill, " cross grinding phenomenon " more outstanding.

Summary of the invention

In order to change existing dry method ball mill, select many defects of powder technology, patent of the present invention provides a kind of powder selection device in mill of dry method ball mill of complete closed type, this device can not only utilize in air blast wind-force will grind, outer finished product is selected in time, reduce most possibly " crossing grinding phenomenon ", and can utilize the negative pressure producing in system, the dust of simultaneously bistrique feed system being kicked up sucks in mill, by pipeline, together with the direct wind of finished product, deliver to the diffusion type deduster on powdery finished product storage vault top, cyclone dust collector, in fiber bag precipitator, by finished product and air separation, finished product is discharged into storage vault, an air part after purification is delivered to mill tail separation bin by back of pipeline, pass through feed back pipe racks to two front portions, storehouse with semi-finished product, with grinding again after mixing of materials in mill, remaining wind is emptying through silencer, the irony material of separating packs dolly into and transports, large granular materials feeding ball mill.

Patent of the present invention solves the technical scheme that its technical problem adopts: a kind of powder selection device in mill of dry method ball mill, in ball mill inner chamber, by a storehouse, select tube cell, select powder connecting tube one, volume damper one, mill tail separation bin, select powder tube connector two, volume damper two, finished product carrier pipe, total blast volume control valve, diffusion type deduster, cyclone dust collector and fiber bag precipitator, quiet airduct, air blast, backwind tube, mill tail separation bin, feed back pipe, ball mill order gas, expect closed circuit connection, one storehouse selects tube cell one end to stretch into centrum connection center port position, mill internal lock wind storehouse, by the bearings being arranged on the closure plate of lock wind storehouse, the other end with select powder connecting tube one to be connected and with mill tail select powder connecting tube two to be in parallel, extract in mill and the finished product materials of grinding tail discharging spiral-tube, through finished product carrier pipe gas, material is connected in diffusion type deduster, cyclone dust collector and fiber bag precipitator, material is separated after classification or mixing, by powder conveyer, be discharged into storage vault, air after separation is again by quiet airduct, air blast, backwind tube, mill tail separation bin, separation bin flashboard, feed back pipe, feed back outlet, ball mill order gas, material connects, semi-product material is inhaled and sent into two forward positions, storehouse, participate in grinding, silencer vertical gas is connected on backwind tube, surplus air is entered in atmosphere.

Electric eye penetration pipe, feed back pipe are installed on a storehouse and select center or the top of tube cell; the electric wire of electric eye is electrically connected with external display by electric eye external connection box; electric eye is installed on the top of selecting tube cell outer wall and this electric eye penetration pipe by electric eye threading arm, and electric eye protection housing is installed.

One storehouse is selected tube cell one end to be supported on and is installed in the bearing block on the closure plate of lock wind storehouse, and the other end is fixed on mill tail separation bin end casing, and bearing two ends take sealing device to prevent that dust from entering bearing, and has cut off the gas phase communication in one, two storehouses.

Bearing block, bearing cap and bearing seal are fixed on the closure plate of lock wind storehouse by bolt of bearing cap, and a storehouse is selected on tube cell bearing seal lining is installed, and bearing seal and bearing seal lining are CONTACT WITH FRICTION.

In mill, a storehouse grinds the material below 3mm, along with progressively entering compartment poplar flitch by compartment grate plate and compartment sieve plate, kicks up air stream, fall in compartment cone, the centrum slipping on lock wind storehouse connects between the riser of lock wind storehouse, at this moment lock brake plates one closes under lock brake plates axle one rotates, lock one has further clamped lock brake plates one under the rotation of lock axle one, does not leak after making material enter Room 1; The rotation of lock brake plates axle two, makes to lock brake plates two and closes, and lock axle two is closed and rotated with lock two, does not leak after making the material of Room 3 enter Room 2; Grinding machine rotation, lock axle three rotates along with the gravity tenesmus of lock three position that goes out of lock, now lock brake plates axle three along with lock brake plates three is subject to the weight effect of gravity and material and automatically opens, the material of Room 3 enters Room 2, almost simultaneously, lock axle four is rotated away from latched position along with the gravity tenesmus of lock four, make to lock brake plates four along with gravity and material gravity and automatically open, 4 Room materials draw off, fall on compartment reverse taper, enter two storehouses, lock brake plates axle four also rotates thereupon; Grinding machine rotates again, lock five, lock axle five, lock six, lock axle six positions remain unchanged, lock brake plates five, lock brake plates six utilize deadweight priority to fall and close, and lock brake plates axle five, lock brake plates axle six rotate thereupon, and one, two storehouse gas, material seal obstructed; Grinding machine rotates again, lock brake plates seven, lock brake plates axle seven, lock brake plates eight, lock brake plates axle eight continue to close, at this moment, lock seven, lock eight utilize the centrifugal force of ball mill and its to fall from gravity, lock brake plates seven, lock brake plates eight have been clamped, lock axle seven, lock axle eight rotate thereupon, go round and begin again, and whole process plays the effect that lock wind is not locked material; Lock wind storehouse closure plate is locked on the riser of riser bolt lock wind storehouse, wind storehouse, and fluted blocking, and each lock axle, lock brake plates axle two ends are also blocked by the hole on lock wind storehouse dividing plate and lock wind storehouse closure plate, and can be freely movable.

In mill tail separation bin, material amasss a timing, separation bin flashboard is opened, semi-product material in the air driven mill tail separation bin being entered by separation bin air intake pipe orifice, inhaled and sent into feed back pipe, from feed back outlet, spray, the unlatching of the separated rear order Jing tri-road gates of irony and bulky grain material, second gate, first gate, close then and draw off, and inner wind is pinned and do not leaked.

Discharging seal receptacle is fixed on discharging centrum above with discharging seal receptacle bolt, discharging sealing has been installed and has been arranged on a storehouse and selected the discharging sealing lining CONTACT WITH FRICTION on tube cell.

The beneficial effect of patent of the present invention is: in this dry method ball mill grinding process, utilizing suspends selects powder principle, adopt air negative pressure formula pipeline to select in time finished product materials, eliminated fully and effectively in mill material " crossing grinding phenomenon ", improve fully the quality of ball mill, can eradicate " the pernicious grinding phenomenon " of superfine-material parcel ball, section and sticky liner plate, grate plate etc. in mill; The powder that selects of the present invention is realized by the mobile of air entirely, regulates each wind speed that selects tube cell mouth can realize easily choosing of qualified products, is more conducive to the upgrading of product; The conveying of material has realized channelization, can accomplish that dust is without leaking, and is conducive to comprehensive improvement of environment; Can simplify technique, minimizing equipment, both can avoid regular plant maintenance, can improve again the running rate of system, had significantly improved output, further saved mass energy; Utilize pipeline to select powder, greatly dwindled the diameter of charging and discharging quill shafts, for sliding bearing bearing is transformed into rolling bearing bearing, provide condition, reduced the coefficient of friction that ball mill rotates, given to save the larger approach of the energy; Particularly transplant electric eye in ball mill, make management and operating personnel and professional researcher can directly observe the fine or not situation of the operation of material, abrasive body in mill and liner plate, grate plate, and corresponding situation when different grinding times, different material moisture content, in research and development mill, select powder technology better, for the distillation of dry method ball mill production technology provides novelty scientific and technical scheme intuitively, change ball mill and only had electric ear, there is no the history of electric eye.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, patent of the present invention is further illustrated.

Fig. 1 is the technology arrangement schematic diagram of patent of the present invention.

Fig. 2 is the vertical section structural map of Fig. 1 powder selection device in mill of dry method ball mill example I.

Fig. 3 is the screening lifting blade 1-1 cutaway view of Fig. 2.

Fig. 4 is the lock wind punishment in advance 2-2 cutaway view of Fig. 2.

Fig. 5 is the bearing arrangement 3-3 cutaway view of Fig. 2.

Fig. 6 is bearing external view and the feed back pipe outlet 4-4 cutaway view of Fig. 2.

Fig. 7 is the electric eye threading arm 5-5 cutaway view of Fig. 2.

Fig. 8 is the electric eye threading arm 6-6 cutaway view of Fig. 2.

Fig. 9 is discharging grate plate and the sealing 7-7 cutaway view of Fig. 2.

In figure 1, seal casing, 2, feeding machine, 3, belt conveyor, 4, feed hopper seal receptacle bolt, 5, feed hopper, 6, feed hopper seal receptacle, 7, charging quill shaft, 8, spiral feeder, 9, ball mill housing, 1O, charging quill shaft bolt, 11, one storehouse electric eye, 12, bearing block, 13, feed back outlet, 14, two storehouse electric eyes one, 15, two storehouse electric eyes two, 16, feed back pipe, 17, tube cell is selected in one storehouse, and 18, electric eye penetration pipe, 19, discharging quill shaft, 20, discharging spiral-tube, 21, separation bin air intake pipe orifice, 22, San road gate, 23, second gate, 24, first gate, 25, electric eye external connection box, 26, sampling nozzle one, 27, volume damper one, 28, discharging helixseal seat, 29, sampling nozzle two, 30, volume damper two, 31, separation bin flashboard, 32, total blast volume control valve, 33, silencer, 34, air blast, 35, clean wind pipe, 36, storage vault, 37, fiber bag precipitator, 38, cyclone dust collector, 39, diffusion type deduster, 40, powder conveyer, 41, compartment sieve plate, 42, discharging sieve plate, 43, mill tail separation bin, 44, backwind tube, 45, finished product carrier pipe, 46, discharging spiral bolt, 47, discharging helixseal, 48, discharging cone, 49, discharging seal receptacle bolt, 50, discharging seal receptacle, 51, discharging sealing, 52, discharging grate plate, 53, bearing cap, 54, bearing, 55, lock wind storehouse riser bolt, 56, bearing seal lining, 57, bearing seal, 58, compartment blind plate, 59, compartment reverse taper, 60, lock wind storehouse dividing plate, 61, compartment grate plate, 62, ball grinding machine lining board, 63, feed hopper sealing, 64, discharging quill shaft bolt, 65, discharging helixseal bolt, 66, select powder connecting tube one, 67, select powder connecting tube two, 68, compartment lifting blade, 69, compartment cone, 70, mill tail lifting blade, 71, lock wind storehouse riser, 72, lock brake plates axle two, 73, lock brake plates two, 74, lock two, 75, lock axle two, 76, lock brake plates axle one, 77, lock brake plates one, 78, lock one, 79, lock axle one, 80, lock three, 81, lock axle three, 82, lock brake plates three, 83, lock brake plates axle three, 84, lock four, 85, lock axle four, 86, lock brake plates four, 87, lock brake plates axle four, 88, lock five, 89, lock axle five, 90, lock brake plates five, 91, lock brake plates axle five, 92, lock six, 93, lock axle six, 94, lock brake plates six, 95, lock brake plates axle six, 96, lock seven, 97, lock axle seven, 98, lock brake plates seven, 99, lock brake plates axle seven, 100, lock eight, 101, lock axle eight, 102, lock brake plates eight, 103, lock brake plates axle eight, 104, centrum connects, and 105, bolt of bearing cap, 106, electric eye threading arm, 107, electric eye protection housing, 108, discharging sealing lining, 109, lock wind storehouse closure plate, 110, lock wind storehouse, 112, pipe group with one heart, 113, eccentric pipe group, 114, separation bin plate, 115, electric eye line.

The specific embodiment

At Fig. 1, Fig. 2, in Fig. 4, by seal casing (1), feeding machine (2), belt conveyor (3) adds material in feed hopper (5), the charging quill shaft (7) that has charging quill shaft bolt (10) to connect, spiral feeder (8) rotation, material is entered in ball mill housing (9) to be pulverized, the airborne dust of feed system is selected tube cell (17) to choose through choosing point tube connector one (66) with the finished product in a storehouse by a storehouse and is in parallel with the powder tube connector two (67) that selects that mill tail separation bin (43) is connected, through finished product carrier pipe (45), diffusion type deduster (39), cyclone dust collector (38), fiber bag precipitator (37) separates, finished product materials classification or be mixed into powder conveyer (40), storage vault (36), the air after purification is through quiet airduct (35), air blast (34), backwind tube (44), separation bin air intake pipe orifice (21) enters, and drives the semi-product material of sliding down along separation bin flashboard (31) from mill tail separation bin (43) through separating, most of by feed back pipe (16), feed back outlet (13) enters ball mill (9) two front portions, storehouse, continues to participate in grinding, a part of irony, large granular materials is along first gate (24), second gate (23), opening of San road gate (22), close and separate, irony material packs dolly into be transported, and large granular materials feeds feeding machine (2) again and participates in grinding, feed hopper seal receptacle bolt (4) has been fixed feed hopper sealing (63) and feed hopper seal receptacle (6), makes it without gas phase, to circulate between feed hopper (5), electric eye penetration pipe (18), feed back pipe (16), one storehouse selects tube cell (17) to be penetrated by the center of the discharging spiral-tube (20) in mill tail discharging quill shaft (19), through discharging seal receptacle (50), head stretches into bearing block (12), in mill, a storehouse grinds the material below 3mm, along with progressively entering compartment poplar flitch (68) by compartment grate plate (61) and compartment sieve plate (41), kicks up air stream, fall in compartment cone (69), the centrum slipping on lock wind storehouse (110) connects between (104) and lock wind storehouse riser (71), at this moment lock brake plates one (77) closes under lock brake plates axle one (76) rotates, lock one (78) has further clamped under the rotation of lock axle one (79), after making material enter Room 1, do not leak, the rotation of lock brake plates axle two (72), makes to lock brake plates two (73) and closes, and lock axle two (75) is closed and rotated with lock two (74), does not leak after making the material of Room 3 enter Room 2, grinding machine rotation, lock axle three (81) rotates along with the gravity tenesmus of lock three (80) position that goes out of lock, now lock brake plates axle three (83) along with lock brake plates three (82) is subject to the weight effect of gravity and material and automatically opens, the material of Room 3 enters Room 2, almost simultaneously, lock axle four (85) is rotated away from latched position along with the gravity tenesmus of lock four (84), make to lock brake plates four (86) along with gravity and material gravity and automatically open, 4 Room materials draw off, fall on compartment reverse taper (59), enter two storehouses, lock brake plates axle four (87) also rotates thereupon, grinding machine rotates again, lock five (88), lock axle five (89), lock six (93), lock axle six (92) positions remain unchanged, lock brake plates five (90), lock brake plates six (94) utilize deadweight successively to fall and close, lock brake plates axle five (91), lock brake plates axle six (95) rotate thereupon, and one, two storehouse gas, material seal obstructed, grinding machine rotates again, lock brake plates seven (98), lock brake plates axle seven (99), lock brake plates eight (102), lock brake plates axle eight (103) continue to close, at this moment, lock seven (96), lock eight (101) utilize the centrifugal force of ball mill to fall from gravity with it, lock brake plates seven (98), lock brake plates eight (102) have been clamped, lock axle seven (97), lock axle eight (100) rotate thereupon, go round and begin again, whole process plays the effect that lock wind is not locked material, when material is ground to substantially for finished product in two storehouses, enter discharging grate plate (52) and discharging sieve plate (42), through mill tail lifting blade (7O), kick up, fall in discharging cone (48), slip into discharging quill shaft bolt (64) connect discharging quill shaft (19) with discharging spiral bolt (46) install discharging spiral-tube (20), the selected powder connecting tube two (67) of finished product is taken away, remaining semi-finished product are discharged into mill tail separation bin (43), material reaches after constant weight, separation bin flashboard (31) is opened, semi-product material and iron particle material flow out through separation bin plate (114), semi-product material is aspirated into feed back outlet (13) and is entered ball mill housing (9) two front portions, storehouse by feed back pipe (16), grinding after the mixing of materials of coming with a storehouse, also supplemented the air in two storehouses simultaneously, this air main source is by backwind tube (44), mill tail separation bin air intake pipe orifice (21) is supplied with, for iron particle, large granular materials is by first gate (24) second gate (23), taking turns out of San road gate (22), close then and draw off, completely cut off leaking of air, iron particle material is pick-uped with flatcar, large granular materials packs feeding machine into and carries out grinding again, lock wind storehouse riser bolt (55) is being connected and fixed lock wind storehouse riser (71) and lock wind storehouse closure plate (109), compartment blind plate (58), ball grinding machine lining board (62) plays a part protection ball mill housing (9) and drives material to be taken up, one storehouse electric eye (11) is installed on electric eye penetration pipe (18) end, two storehouse electric eye one (14), two storehouse electric eyes two (15) are installed on a storehouse by electric eye threading arm (106) and select outside four of tube cell (17), by the electric eye line (115) on electric eye external connection box (25) and outside TV, electrically connect, to observe situation in mill, lock wind storehouse dividing plate (60) circulates and establishes for the material between lock wind storehouse (11O) and compartment lifting blade (68) is orderly, bearing seal lining (56) is arranged on a storehouse and selects tube cell (17) upper, and bearing block (12) is connected on lock wind storehouse closure plate (109) with bolt of bearing cap (105) with bearing cap (53), bearing (54), bearing seal (57) are installed on bearing seal lining (56), it is upper that discharging seal receptacle bolt (49) is connected to discharging centrum (48) by discharging seal receptacle (5O), and discharging sealing (51) is installed on discharging sealing lining (108), discharging helixseal seat (28), discharging helixseal (47) are connected and fixed on mill tail separation bin (43) side plate by discharging helixseal bolt (65).

In Fig. 3, a storehouse material is ground into 3mm and by compartment sieve plate (41), falls compartment lifting blade (68) above afterwards below, after being kicked up, slips on compartment centrum (69); Ball grinding machine lining board (62) is close to ball mill housing (9) and is installed; Electric eye penetration pipe (18) is installed in compartment centrum (69).

In Fig. 5, ball grinding machine lining board (62) is close to ball mill housing (9) and is installed; Compartment blind plate (58) Fen Nei garden and cylindrical two parts, be installed on respectively on compartment reverse taper (59) and lock wind storehouse closure plate (109), compartment reverse taper (59) is mainly to promote the material in lock wind storehouse (11O) to move to two storehouses, bearing block (12) all selects tube cell (17) to install with bearing (54) and bearing seal lining (56) around a storehouse, bolt of bearing cap (105) is arranged on bearing block (12).

In Fig. 6, electric eye penetration pipe (18) is through in the middle of feed back pipe (16), outside also cover has a storehouse to select tube cell (17), feed back outlet (13) is welded in feed back pipe (16) and a storehouse is selected between tube cell (17), bearing seal lining (56) is installed on a storehouse and selects the peripheral relevant position of tube cell (17), and the position part of bearing cap (53) has bolt of bearing cap (105) fixing.

In Fig. 7, Fig. 8, by electric eye penetration pipe (18), feed back pipe (16), a storehouse, select tube cell (17) to form concentric pipe group (112) and eccentric pipe group (113); Electric eye threading arm (106) is welded in electric eye penetration pipe (18), feed back pipe (16), a storehouse and selects tube cell (17) upper, and electric eye protection housing (107) is specially for protecting two storehouse electric eye one (14), two storehouse electric eyes two (15) to set up;

In Fig. 9, material enters discharging sieve plate (42) by discharging grate plate (52), arrive mill tail lifting blade (70), material is kicked up, slip into discharging centrum (48), discharging seal receptacle bolt (49) is connecting discharging centrum (48) and discharging seal receptacle (50), discharging sealing (51), discharging sealing (51) and discharging sealing lining (108) CONTACT WITH FRICTION, seal isolation is opened the circulation of air; One storehouse selects tube cell (17), feed back pipe (16), electric eye penetration pipe (18) to form one group of pipeline and be arranged in mill tail discharging centrum (48).

Claims

1. a powder selection device in mill of dry method ball mill, in ball mill inner chamber, selects tube cell by a storehouse, select powder connecting tube one, volume damper one, mill tail separation bin, select powder tube connector two, volume damper two, finished product carrier pipe, total blast volume control valve, diffusion type deduster, cyclone dust collector and fiber bag precipitator, quiet airduct, air blast, backwind tube, mill tail separation bin, feed back pipe, ball mill order gas, expect closed circuit connection, it is characterized in that: a storehouse selects tube cell one end to stretch into centrum connection center port position, mill internal lock wind storehouse, by the bearings being arranged on the closure plate of lock wind storehouse, the other end with select powder connecting tube one to be connected and with mill tail select powder connecting tube two to be in parallel, extract in mill and the finished product materials of grinding tail discharging spiral-tube, through finished product carrier pipe gas, material is connected in diffusion type deduster, cyclone dust collector and fiber bag precipitator, separate material after classification or mixing, by powder conveyer, is discharged into storage vault, and the air after separation is again by quiet airduct, air blast, backwind tube, mill tail separation bin, separation bin flashboard, feed back pipe, feed back outlet, ball mill order gas, material connects, and semi-product material is inhaled and sent into two forward positions, storehouse, participates in grinding, and silencer vertical gas is connected on backwind tube, and surplus air is entered in atmosphere.

2. powder selection device in mill of dry method ball mill according to claim 1; it is characterized in that: electric eye penetration pipe, feed back pipe are installed on a storehouse and select center or the top of tube cell; the electric wire of electric eye is electrically connected with external display by electric eye external connection box; electric eye is installed on the top of selecting tube cell outer wall and this electric eye penetration pipe by electric eye threading arm, and electric eye protection housing is installed.

3. according to thousand method ball mill powder selection device in mill described in claims 1, it is characterized in that: a storehouse is selected tube cell one end to be supported on and is installed in the bearing block on the closure plate of lock wind storehouse, the other end is fixed on mill tail separation bin end casing, bearing two ends take sealing device to prevent that dust from entering bearing, and have cut off the gas phase communication in one, two storehouses.

4. piece according to the powder selection device in mill of dry method ball mill described in claims 1, it is characterized in that: bearing block, bearing cap and bearing seal are fixed on the closure plate of lock wind storehouse by bolt of bearing cap, one storehouse is selected on tube cell bearing seal lining is installed, and bearing seal and bearing seal lining are CONTACT WITH FRICTION.

5. according to the powder selection device in mill of dry method ball mill described in claims 1, it is characterized in that: in mill, a storehouse grinds the material below 3mm, along with progressively entering compartment poplar flitch by compartment grate plate and compartment sieve plate, kicks up air stream, fall in compartment cone, the centrum slipping on lock wind storehouse connects between the riser of lock wind storehouse, at this moment lock brake plates one closes under lock brake plates axle one rotates, lock one has further clamped lock brake plates one under the rotation of lock axle one, does not leak after making material enter Room 1; The rotation of lock brake plates axle two, makes to lock brake plates two and closes, and lock axle two is closed and rotated with lock two, does not leak after making the material of Room 3 enter Room 2; Grinding machine rotation, lock axle three rotates along with the gravity tenesmus of lock three position that goes out of lock, now lock brake plates axle three along with lock brake plates three is subject to the weight effect of gravity and material and automatically opens, the material of Room 3 enters Room 2, almost simultaneously, lock axle four is rotated away from latched position along with the gravity tenesmus of lock four, make to lock brake plates four along with gravity and material gravity and automatically open, 4 Room materials draw off, fall on compartment reverse taper, enter two storehouses, lock brake plates axle four also rotates thereupon; Grinding machine rotates again, lock five, lock axle five, lock six, lock axle six positions remain unchanged, lock brake plates five, lock brake plates six utilize deadweight priority to fall and close, and lock brake plates axle five, lock brake plates axle six rotate thereupon, and one, two storehouse gas, material seal obstructed; Grinding machine rotates again, lock brake plates seven, lock brake plates axle seven, lock brake plates eight, lock brake plates axle eight continue to close, at this moment, lock seven, lock eight utilize the centrifugal force of ball mill and its to fall from gravity, lock brake plates seven, lock brake plates eight have been clamped, lock axle seven, lock axle eight rotate thereupon, go round and begin again, and whole process plays the effect that lock wind is not locked material.

6. the powder selection device in mill of dry method ball mill of being confused according to claims 1, it is characterized in that: lock wind storehouse closure plate is locked on the riser of riser bolt lock wind storehouse, wind storehouse, and fluted blocking, each lock axle, lock brake plates axle two ends are also blocked by the hole on lock wind storehouse dividing plate and lock wind storehouse closure plate, and can be freely movable.

7. according to the powder selection device in mill of dry method ball mill described in claims 1, it is characterized in that: in mill tail separation bin, material amasss a timing, separation bin flashboard is opened, semi-product material in the air driven mill tail separation bin being entered by separation bin air intake pipe orifice, inhaled and sent into feed back pipe, from feed back outlet ejection, the unlatching of the separated rear order Jing tri-road gates of irony and bulky grain material, second gate, first gate, close then and draw off, and inner wind is pinned and do not leaked.

8. according to the powder selection device in mill of dry method ball mill described in claims 1, it is characterized in that: it is upper that discharging seal receptacle discharging seal receptacle bolt is fixed on discharging centrum, discharging sealing has been installed and has been arranged on a storehouse and selected the discharging sealing lining CONTACT WITH FRICTION on tube cell.