CN201350451Y - Powder concentrator of wide particle size distribution - Google Patents

Abstract

The utility model provides a powder concentrator of wide particle size distribution. A high efficiency powder concentrator of wide particle size distribution comprises a shell, a cage-type rotor, a material spreading plate, a central wind pipe and a coarse powder cone. The central wind pipe is arranged at the upper part of the shell; the material spreading plate and the rotor are arranged under the central wind pipe; the shell is provided with an air inlet and a feed port; the coarse powder cone is arranged under the rotor; the semicircular aggregate bin of a quadric selecting device is arranged at the upper part of the coarse powder cone; the lower port of the aggregate bin is communicated with the upper port of a four-way junction by an air locking valve; the two side ports of the four-way junction are respectively connected with a separator and overgrate air; the lower port of the four-way junction is connected with the air locking valve; the upper port of the separator is connected with an air outlet pipe; and the lower port of the separator is communicated with an overflow cabin by the air locking valve. The utility model is capable of selecting the fine powder, the finer powder and the coarser powder of wide particle size distribution, which are needed by the cement at one time; the particle distribution of the selected powder is improved; the cement water demand is reduced; the compatibility of the cement and admixture and the working performance of the cement are improved; and the energy consumption and the manufacture cost are reduced.

Description

The powder concentrator that a kind of wide particle diameter distributes

Technical field

The utility model relates to a kind of powder selection device, particularly a kind of powder concentrator that is applicable to the wide particle diameter distribution of cement closed-circuit grinding.

Background technology

At present, cement grinding is generally all used ball mill, is divided into out streaming and encloses two kinds of streamings by production technology.Drive stream mill and be grog and composite material mixed in proportion after, carry out grinding in the lump, the powder behind the grinding need not to select powder, directly is used for the cement manufacturing; But it is higher to open stream mill energy consumption, yields poorly, and production cost is big, now progressively is eliminated.It is low because of its energy consumes to enclose the stream mill, and the system throughput height helps advantages such as maximization and raising productivity per worker and is used widely in grinding system; But the powder behind the circle stream abrasive dust mill needs to select powder to handle through powder concentrator.In recent years, along with the development of high-efficient powder concentrator technology, the separation accuracy of powder concentrator is more and more higher, and the distribution of particles of cement is more and more narrow, and the ratio of composite material is on the low side, and the water requirement of cement is bigger than normal, and is poor with the compatibility of additive, and the service behaviour of cement descends.For the particle diameter that changes cement distributes, improve the service behaviour of cement, some factories are forced to make the closed-circuit grinding system into the open-circuit grinding system, but open-circuit grinding is being incomparable with closed-circuit grinding aspect energy consumption and the maximization; Also there are some producers to adopt and earlier partially mixed material carried out independent grinding, produce the thicker powder of part particle diameter, again these are joined in the cement that closed-circuit grinding goes out than coarse grain footpath composite material powder, thereby change the distribution of particles of cement, very effective in the distribution of particles that changes cement although it is so, but also make the cement grinding system become very complicated, investment increases greatly.

The utility model content

Technical problem to be solved in the utility model is, the powder concentrator that the wide particle diameter that provides a kind of confession to be applicable to cement closed-circuit grinding technology distributes, it can change the narrow shortcoming of distribution of particles of high-efficient powder concentrator in the past effectively, produce the cement that wide particle diameter distributes, the water requirement of cement is reduced, improve the compatibility of cement and additive.

The technical scheme in the invention for solving the technical problem is: comprise housing, cage-type rotor, spreading disk, central air hose and meal cone; Central air hose is loaded on the top of housing, and its below is provided with spreading disk and rotor, is provided with air inlet and charging aperture on housing; The below of rotor is provided with the meal cone; The secondary sorting unit that includes aggregate bin, four-way connection, separator and overflow storehouse, semi-circular aggregate bin is located at the top of meal cone, the end opening of aggregate bin interlinks by the suitable for reading of air valve and four-way connection, the both sides mouth of four-way connection connects with separator and secondary wind facies respectively, and its end opening is connected to air valve; The discharge pipe that is connected to suitable for reading of separator, the end opening of separator interlinks by air valve and overflow storehouse.

The bottom in above-mentioned overflow storehouse is inverted V-shaped, lower part, type overflow storehouse is set as out feed bin and feed back storehouse, and the lower port that goes out feed bin is provided with bleeder valve, and it is relative with the end opening of separator to go out feed bin, make and at first falling into out in the feed bin of sub-electing overflow into the feed back storehouse automatically after feed bin to be gone out is filled than meal.

Behind the bleeder valve that goes out the feed bin lower end, be provided with weigher, sneak in the cement than the weight of meal, change the distribution of particles of cement easily with metering.

The last open area of above-mentioned aggregate bin be on the meal cone open area 1/5th to 1/8th, only intercept the part meal and carry out the secondary sorting, going out than fine powder with than the mixing match that meal enough is used for cement of sorting gets final product, to alleviate the operating pressure of secondary sorting.

Be provided with the adjusting butterfly valve in separator discharge pipe suitable for reading, to regulate the air quantity of secondary air easily, control enters the diameter of particle of separator; Because the density of composite material and clinker is different, the easier separator that enters of the clinker that the composite material specific density that density is lighter is bigger is collected, to improve in the composite material ratio than meal.

During work, fall into by charging aperture through the powder of grog behind the grinding machine grinding and composite material on the spreading disk of rotation at a high speed, shed to powder-separating area, under the effect of high speed rotor rotated, fine powder enters central air hose and extracts out, enters in the follow-up dust-precipitator to be collected.The meal major part directly falls in the meal cone, and fraction enters annular aggregate bin.Enter the meal in the annular aggregate bin, thick powder wherein directly falls in the meal cone by the air valve of four-way connection below, all the other powders enter in the separator in that the secondary wind action is next, enter the follow-up dust-precipitator from separator discharge pipe suitable for reading than fine powder to be collected; Then fall into the going out in the feed bin of overflow storehouse of separator below than meal, discharge, sneak in the cement after the metering from the bleeder valve that goes out the feed bin bottom; And after going out filling than meal in the feed bin, then flow into automatically in the feed back storehouse, return in the lump into grinding machine grinding again with meal in the meal cone.With the fine powder that sub-elects, mix in proportion, can obtain the cement that wide particle directly distributes than fine powder with than meal.

The beneficial effects of the utility model are: it is rational in infrastructure, can improve the distribution of particles of selected powder effectively, be convenient to produce the cement that wide particle diameter distributes, the water requirement of cement is reduced, improve the compatibility of cement and additive, and the service behaviour of cement, and capable of reducing energy consumption and production cost.

Description of drawings

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

Among the figure: 1 is that discharge valve, 2 is that meal cone, 3 is that housing, 4 is that air inlet, 5 is that cage rotor, 6 is that spreading disk, 7 is that charging aperture, 8 is that central air hose, 9 is that aggregate bin, 10 is that air valve, 11 is that four-way connection, 12 discharge pipes, 13 are that butterfly valve, 14 is that double-venturi flowmeter, 15 is that secondary air feed pipe, 16 is that separator, 17 is that air valve, 18 is that overflow storehouse, 18-1 are that feed back storehouse, 18-2 are that bleeder valve, 20 is that weigher, 21 is an air valve for going out feed bin, 19.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is described in further detail.

The utility model comprises housing 3, cage-type rotor 5, spreading disk 6, central air hose 8, meal cone 2 and secondary powder concentrator structure; Central air hose 8 is loaded on the top of housing 3, and its below is provided with spreading disk 6, is provided with charging aperture 7 on the housing 3 corresponding to spreading disk 6, spreading disk 6 have a cage rotor 5, be provided with air inlet 4 in tangential direction corresponding to the housing 3 of cage rotor 5; The below of cage rotor 5 is provided with meal cone 2, and the end opening of meal cone 2 is connected to bleeder valve 1.The secondary sorting unit includes aggregate bin 9, four-way connection 11, separator 16 and overflow storehouse 18, annular aggregate bin 9 is located at the top of meal cone 2, the last open area of aggregate bin 9 is the sixth of open area on the meal cone 2, and the end opening of aggregate bin 2 interlinks by air valve 10 and the suitable for reading of four-way connection 11; Be connected to air valve 21 under the end opening of four-way connection 11, the both sides mouth of four-way connection 11 links to each other with overfire air fan with the secondary air feed pipe 15 of separator 16 respectively; The discharge pipe 12 that is connected to suitable for reading of separator 16 is provided with butterfly valve 13 and double-venturi flowmeter 14 in discharge pipe 12; The end opening of separator 16 interlinks by air valve 17 and overflow storehouse 18; The bottom is 18 lower parts, reverse V-shaped overflow storehouse and is set as out feed bin 18-2 and feed back storehouse 18-1, and the lower port that goes out feed bin 18-2 is provided with bleeder valve 19.It is relative with the end opening of air valve 17 to go out feed bin 18-2, is provided with weigher 20 behind the bleeder valve 19; Lower port and the meal cone 2 of feed back storehouse 18-1 interlink.

During work, fall into by charging aperture 7 on the spreading disk 6 of rotation at a high speed through grog behind the grinding machine grinding and composite material powder, powder is shed to powder-separating area, under the effect of the cage rotor 5 that rotates at a high speed, fine powder enters central air hose 8 and extracts out, enter in the follow-up dust-precipitator and be collected, the particle diameter of fine powder is mainly 3um～50um.The meal major part directly falls in the meal cone 2, and fraction enters annular aggregate bin 9; Enter the meal in the annular aggregate bin 9, thick powder wherein directly falls in the meal cone 2 by the end opening and the air valve 21 of four-way connection 11, all the other powders and secondary wind enter in the separator 16 in the lump, under the secondary wind action, enter the follow-up dust-precipitator from separator 16 discharge pipes 12 suitable for reading than fine powder and to be collected, the particle diameter of fine powder is mainly 10um～50um; By observing the flow of double-venturi flowmeter 14 in the discharge pipe 12, by regulating butterfly valve 13, controlling the air quantity of secondary wind easily, thereby control enters the diameter of particle of separator 16.Then fall into the going out in the feed bin 18-2 of overflow storehouse 18 of separator 16 belows than meal, discharge from the bleeder valve 19 that goes out feed bin 18-2 bottom, sneak in the cement after weigher 20 meterings, this particle diameter than meal is mainly 45um～80um; And after going out filling than meal among the feed bin 18-2, then flow into automatically among the 18-1 of feed back storehouse, be drained in the meal cone 2, return in the lump into grinding machine grinding again with meal.The fine powder that this powder concentrator is once sub-elected, mix in proportion, can obtain the cement that wide particle directly distributes than fine powder with than meal.

Claims (5)

1, a kind of powder concentrator of wide particle diameter distribution comprises housing, cage-type rotor, spreading disk, central air hose and meal cone; Central air hose is loaded on the top of housing, and its below is provided with spreading disk and rotor, is provided with air inlet and charging aperture on housing; The below of rotor is provided with the meal cone; It is characterized in that: the secondary sorting unit that includes aggregate bin, four-way connection, separator and overflow storehouse, semi-circular aggregate bin is located at the top of meal cone, the end opening of aggregate bin interlinks by the suitable for reading of air valve and four-way connection, the both sides mouth of four-way connection connects with separator and secondary wind facies respectively, and its end opening is connected to air valve; The discharge pipe that is connected to suitable for reading of separator, the end opening of separator interlinks by air valve and overflow storehouse.

2, the powder concentrator of a kind of wide particle diameter distribution according to claim 1, it is characterized in that: the bottom in above-mentioned overflow storehouse is inverted V-shaped, lower part, type overflow storehouse is set as out feed bin and feed back storehouse, and it is relative with the end opening of separator to go out feed bin, and the lower port that goes out feed bin is provided with bleeder valve.

3, the powder concentrator of a kind of wide particle diameter distribution according to claim 1 is characterized in that: be provided with weigher behind the bleeder valve that goes out the feed bin lower end.

4, the powder concentrator that distributes of a kind of wide particle diameter according to claim 1 is characterized in that: the last open area of above-mentioned aggregate bin be on the meal cone open area 1/5th to 1/8th.

5, the powder concentrator of a kind of wide particle diameter distribution according to claim 1 is characterized in that: be provided with butterfly valve in separator discharge pipe suitable for reading.