CN2440584Y

CN2440584Y - Separator for small broken steel balls from iron powder

Info

Publication number: CN2440584Y
Application number: CN 00215930
Authority: CN
Inventors: 尹晓天; 姬广勤; 潘广春
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-08-15
Filing date: 2000-08-15
Publication date: 2001-08-01
Anticipated expiration: 2010-08-15

Abstract

The utility model relates to a separation and removal device for small broken steel balls and iron dust and iron powder of a ball miller, which is composed of elliptical or circular holes arranged on the upper peripheral side of a material output pipe of the ball miller, a metal circular pipe welded on the lower part of the holes, a baffle plate arranged on the back of the holes, a circular pipe arranged on the outlet of the baffle plate, a square circular short joint arranged under the circular pipe, an electromagnetic box arranged under the square circular short joint, an electromagnet arranged on the middle part of the electromagnetic box, a square circular short joint arranged on the lower end of the electromagnet, a power supply of the electromagnet, a circular pipe arranged on the lower end of the lower square circular short joint, a circular pipe welded on the peripheral side of the circular pipe, and a baffle plate arranged on the peripheral side of the circular pipe, and a material eliminating baffle plate arranged on the lower end of the circular pipe. The utility model can continuously remove the small broken steel balls, the iron dust, and the iron powder in the ball miller, and enhances the yield of milling coal.

Description

The broken small ball of ball mill separates scavenge unit with the iron filings iron powder

The utility model belongs to the broken small balls of enterprise's ball mill such as coal-burning power plant, cement plant, metallurgy and separates scavenge unit with the iron filings iron powder.

At present the removing of the broken small ball of ball mill is adopted usually and regularly shut down screening method, install additional at the grinding cylinder place and get rid of the ball mouth or place, mill tube entry and exit installs interim screen cloth screening additional, the method is wanted the trapping grinding machine, and holding time is long, the influence production of generating electricity; Labour intensity is big, takies artificial many.Though and the harmful nothing of iron filings that produce in the ball mill course of work and iron powder is sharp, the precedent of also not removing.

The different steel ball of diameter is housed in the ball mill, in the course of work, between steel ball and the steel ball, between steel ball and the cylindrical shell wave watt, the bump, the friction that do not stop mutually between steel ball and the raw coal, makes steel ball broken or grind little.Ball mill outlet tubular journal is equipped with spiral bar, purpose is to stop steel ball not go out cylindrical shell, because the cylindrical shell material level is higher than the hollow shaft outer, the cylindrical shell end is again a cone in the actual motion, small ball is had inevitable guide effect, thereby spiral bar does not stop the steel ball coal dust to enter hollow shaft at all.These irregular broken small balls accumulate in and grind mouth and tubular journal place, a part is clamp-oned and is ground a mouthful sound cooperation junction, hinder the mill tube normal rotation, cause the distortion of hollow diameter of axle end, sealing ring to damage, leak powder, severe contamination is caused at the scene, another part is under the suction of pulverized coal preparation system wind, and be carried to behind the certain altitude (usually to the wood block separator place) and fall back to again and grind mouth, and so forth Xun Huan result: (1) has quickened the wearing and tearing of this pipeline section.(2) increased SR, reduced milling efficiency, increased the ball mill power consumption, ball mill is difficult in operation under the optimal economic state.(3) cause ball mill to stop up canful easily, the influence generating is produced.Fine grain iron powder then enters burner hearth with coal dust not only influences burning, and causes pulverized coal preparation system and boiler plant wearing and tearing.In time remove if will accumulate in the broken small ball and the iron powder at grinding cylinder end and hollow shaft place, the problems referred to above are readily solved, and to preventing that stove four pipes from having great benifit because of the wearing and tearing explosion.

The purpose of this utility model is to provide broken small ball of a kind of ball mill and iron filings iron powder scavenge unit.

The technical solution of the utility model is: open an ellipse or circular port on the ball mill discharge nozzle, below, hole weldering one metal circular tube, be provided with baffle plate thereafter, install insulation, non-magnetic electromagnetic cage under the insertion plate door additional, in this case electromagnet is housed, electromagnet is circle or semicircle or ellipse or triangle, on the outlet pipe section of electromagnetic cage, connect an airduct, Pressure gauge is housed on the airduct and adjusts baffle plate, wind regime can be original Powder discharging fan, tertiary air machine, also can be other wind regime; Install isolating baffle additional in the airduct bottom and be used for material stock, flexible canvas bag of edge joint is collected broken small ball and iron powder under baffle plate.

Broken small ball moves upward in the process with coal dust under the swabbing action of system's wind, owing to its proportion falls into electromagnetic cage greater than the proportion of coal dust, and is received by electromagnet, and after the electromagnet outage, broken small ball, iron filings iron powder fall into canvas bag and transport.Broken small ball relies on gravity from the separation process of ball mill discharge nozzle, there is thick pulverized coal particle also to enter in the electromagnetic cage unavoidably, be provided with airduct for this reason, after electromagnet outage discharging front opening windshield plate blows, the coal dust of light specific gravity blown get back in the ball mill discharge nozzle, after purging baffle plate in jar draft gauge is housed, with adjust blast, air quantity is moderate.

The effect of invention: the powder process of (1) ball mill is exerted oneself and is improved at least more than 15%; (2) mill is exported to wood block separator pipeline section wear extent and significantly reduces, and can effectively prolong service life of equipment 5-7 doubly; (3) under the identical coal-grinding amount of ball mill, economize on electricity more than 15%; (4) can prevent effectively that broken small ball from clamp-oning the coal-grinding outlet place of being association of activity and inertia, solve sealing ring and come off and leak the powder problem; (5) can suck steel ball and the iron filings that differ in size, vary in weight by adjustment, not need to shut down again regular screening steel ball, not influence boiler for producing, not delay the generating set generating electromagnet magnetic flux; (6) help improving boiler combustion, prevent the formation and the slagging scorification of di-iron trioxide; (7) wear extent at minimizing pulverized coal preparation system and each each position of heating surface of boiler reduces stove " four pipes " explosion number of times, the service life of improving equipment.

For further disclosing the technical solution of the utility model, pass through below in conjunction with Figure of description

Embodiment is further elaborated:

The broken small ball of Fig. 1-ball mill, iron powder separate scavenge unit installation site figure

The broken small ball of Fig. 2-ball mill, iron powder separate the scavenge unit structure chart

The outlet of 1-ball mill inlet 2-ball mill barrel 3-ball mill

4-baffle plate 5-pipe 6-circumference pipe nipple 7-electromagnet

8-power supply box 9-electromagnetic cage 10-pipe 11-air intake baffle plate

12-pipe 13-removes the material baffle plate

The utility model is to separate like this to remove to broken ball in the ball mill and iron powder:

Coal enters ball mill barrel 2 from ball mill inlet 1, the different steel ball of specification is housed in the cylindrical shell, cylindrical shell rotates and drives the ball rotation, the coal grinding that to come in, taken away by air exhauster, normal condition baffle plate 4 is opened, the broken steel ball of being smoked by air exhauster, iron filings or iron powder pass through baffle plate 4 under gravity and centrifugal action, round pipe 5, circumference pipe nipple 6 falls into electromagnetic cage 9, held by magnet 7, when receiving broken steel ball and iron filings or iron powder, deenergization 8 demagnetizations, broken steel ball and iron filings or iron powder fall into pipe 12 by circumference pipe nipple 6, open baffle plate 11, gas enters by pipe 10, the coal dust that enters is blown afloat, enter ball mill outlet 3, be pumped to storeroom or enter in the balling drum with the good coal dust of mill.Open baffle plate 13, broken steel ball and iron filings or iron powder drop in the canvas bag or transport on the dolly and get final product.

Claims

1, a kind of coal-fired power plant that is used for, the broken small ball of the ball mill of cement plant and smelter separates scavenge unit with the iron filings iron powder, it is characterized in that on the discharge nozzle of ball mill outlet, opening an ellipse or circular port, the below, hole is welded with metal circular tube, be provided with baffle plate thereafter, be provided with pipe in the baffle plate exit, the pipe below is provided with the circumference pipe nipple, be provided with electromagnetic cage in its bottom, be provided with electromagnet at the electromagnetic cage middle part, the electromagnetic cage lower end is provided with the circumference pipe nipple, the both positive and negative polarity of electromagnet both positive and negative polarity and power supply box links separately, under have an area of the pipe nipple lower end and be provided with pipe, all face down bondings of pipe have pipe and baffle plate are installed, the lower end of pipe is equipped with baffle plate.

2, the broken small ball of ball mill according to claim 1 separates scavenge unit with the iron filings iron powder, it is characterized in that electromagnet ovalize or circle or triangle, inserts the contact site with electromagnetic cage and belongs to hermetically-sealed construction.

3, the broken small ball of ball mill according to claim 1 separates scavenge unit with the iron filings iron powder, it is characterized in that pipe and baffle plate, circumference pipe nipple are connected to flange or clamp connection or welding.

4, the broken small ball of ball mill according to claim 1 separates scavenge unit with the iron filings iron powder, it is characterized in that electromagnetic cage and circumference pipe nipple are connected, have an area of pipe nipple and pipe and be connected to flange or be welded to connect.