CN2157833Y

CN2157833Y - Medium spiral classifier

Info

Publication number: CN2157833Y
Application number: CN 93208058
Authority: CN
Inventors: 赵中元
Original assignee: Beijing General Research Institute of Mining and Metallurgy
Current assignee: Beijing General Research Institute of Mining and Metallurgy
Priority date: 1993-04-03
Filing date: 1993-04-03
Publication date: 1994-03-02
Anticipated expiration: 2003-04-03

Abstract

The utility model relates to a medium spiral back grader is used in ore dressing, its characterized in that the device by drive arrangement, rotor, a sieve section of thick bamboo, interior spiral, dig the wooden dipper device and the medium constitutes, have according to the particle size classification, return sand promotes and continuity of operation's function, replace spiral classifier, reducible ore grinding is smashed, reach and improve classification efficiency and energy-conserving purpose, can extensively be used for the particle size classification of ore dressing ore grinding process.

Description

Sizing machine for dielectric

The utility model relates to the equipment of beneficiating and grinding ore process mineral granularity classification, is a kind of ore dressing grader, can be widely used in the Mineral Classification of department's ore dressing mill processes such as metallic ore and building materials, chemical industry, coal, geology.

So far the spiral classifier that continue to use in closed circuit grinding always in ore dressing plant both domestic and external mainly is made up of spiral, bracket, expansion chamber, downflow weir.It can make not promoted by spiral by levigate coarse granule and return in the ball mill, fine fraction gives next section beneficiating process by downflow weir, but the spiral classifier of this employing gravitational settling classification, exist in the sand return product (referring to the coarse granule mineral that spiral promotes) and be mingled with the particulate product, and these particulate products have the derichment phenomenon than great, of high grade in sand return, and these sand return products enter grinding machine and easily produced pulverizing, cause the ore grinding argillization, reduced grinding efficiency.The classification efficiency of this spiral classifier generally has only 20-40%, causes the ore grinding ability drop, the energy consumption height.The purpose of utility model is to overcome the problem that spiral classifier exists, and studies a kind of raising classification efficiency, improves the ore grinding disposal ability, and energy efficient reduces ore and crosses the grader of pulverizing.

Fig. 1 is a medium supination grader profilograph of the present utility model.

Fig. 2 digs the wooden dipper profile for medium supination grader medium of the present utility model.

Fig. 3 digs the wooden dipper profile for medium supination grader of the present utility model sand return.

Fig. 4 is a medium supination grader roller support roller profile of the present utility model.

Fig. 5 is a medium supination grader screen drum profile of the present utility model.

Fig. 6 is a medium supination grader big roller support roller profile of the present utility model.

Among Fig. 1

Reductor ［ 1 ］ underframe ［ 2 ］ universal coupling ［ 3 ］

Rotor ［ 10 ］ pulp tank ［ 11 ］ central tube ［ 12 ］

Internal classification blade ［ 13 ］ roller ［ 14 ］ is given ore deposit scalping tube ［ 15 ］

Screen drum ［ 16 ］ medium digs wooden dipper ［ 17 ］ sand return and digs wooden dipper ［ 18 ］

Among Fig. 2

Central tube ［ 12 ］ medium digs wooden dipper ［ 17 ］

Among Fig. 3

Wooden dipper ［ 18 ］ is dug in inside spin sand return tube ［ 7 ］ sand return

Among Fig. 4

Roller ［ 6 ］ support roller ［ 20 ］ roller bracket ［ 21 ］

The solid axle sleeve ［ 24 ］ of vertical shaft ［ 22 ］ vertical shaft sleeve ［ 23 ］ support

Among Fig. 5

Screen drum ［ 16 ］ central tube ［ 12 ］ pulp tank ［ 11 ］

Underframe ［ 2 ］ wash tub pipe ［ 19 ］

Among Fig. 6

Roller ［ 14 ］ internal classification blade ［ 13 ］ central tube ［ 12 ］

Support roller ［ 20 ］ roller bracket ［ 21 ］ vertical shaft ［ 22 ］

The solid axle sleeve ［ 24 ］ of vertical shaft sleeve ［ 23 ］ support

Medium supination grader of the present utility model is dug by reductor ［ 1 ］, universal coupling ［ 3 ］, inside spin sand return tube ［ 7 ］, internal helical blades ［ 8 ］, rotor ［ 10 ］, rotor overcoat ［ 9 ］, pulp tank ［ 11 ］, central tube ［ 12 ］, internal classification helical blade ［ 13 ］, screen drum ［ 16 ］, scalping tube ［ 25 ］, medium mainly that wooden dipper ［ 17 ］, sand return dig wooden dipper ［ 18 ］ and central tube critical pieces such as ［ 12 ］ constitutes.As shown in Figure 1, the shaft of reductor ［ 1 ］ drives universal coupling ［ 3 ］, and universal coupling drives rotor ［ 10 ］ and rotates.Rotor ［ 10 ］ is made up of inside spin sand return tube ［ 7 ］, central tube ［ 12 ］, screen drum ［ 16 ］ and rotor overcoat ［ 9 ］.The cylindrical shell of rotor ［ 10 ］ is that internal classification helical blade ［ 13 ］ is set in the screen drum ［ 16 ］, and the left side of rotor ［ 10 ］ is scalping tube ［ 25 ］, and the screen drum of right-hand part is a fine screen mesh.Screen drum ［ 16 ］ and scalping tube ［ 25 ］ are provided in a side of on the identical drum surface of diameter, adopt two kinds of different screen clothes to be fixed on the screen drum.

The effect of rotor overcoat ［ 9 ］ is a undersize of collecting wide-meshed screen, and rotor overcoat ［ 9 ］ is established internal helical blades ［ 8 ］.

Roller ［ 6 ］ on the rotor ［ 10 ］, roller ［ 14 ］ are supported by support roller ［ 20 ］ to be formed.The revolute pair (seeing Fig. 4 and Fig. 6) that the roller idler pulley of rotor ［ 10 ］ supports.

Rotor ［ 10 ］ in use, the horizontal level of its installation is that left is high right-hand low, becomes 12.8 ° of angles, generation sliding force left on the axle, so establish horizontal wheels ［ 5 ］ axial support prevents axial downslide.

Support ［ 2 ］ supports reduction box base and two roller brackets ［ 24 ］, (seeing Fig. 4 Fig. 6), support roller ［ 20 ］ is supported by roller bracket ［ 21 ］, the vertical shaft ［ 22 ］ of solid welding is arranged at the support bottom, for being rotatably assorted, vertical shaft sleeve ［ 23 ］ solid welding is on support ［ 24 ］ by axle sleeve ［ 23 ］ for vertical shaft ［ 22 ］.

The undersize of the fine screen mesh of rotor ［ 10 ］ is discharged by the discharge pipe of bottom after being collected by pulp tank ［ 11 ］.

Can be clear that the dig sand structure of wooden dipper ［ 17 ］ of central tube ［ 12 ］ and medium collection by Fig. 2, its effect is that medium collection is arrived in the central tube ［ 12 ］, because an entire equipment left side is high right low, medium can be rolled into right-hand member by the left end in the central tube ［ 12 ］, enters to ore deposit end and ore pulp fusion again.It is the 20-25 millimeter that medium adopts diameter, and length is the small-sized rod iron of 25-40 millimeter, and the quantity that adds rod iron is generally 100-150.

As shown in Figure 1, the ore pulp that ball mill is discharged is directly delivered to the right-hand member lower position feed port ［ 15 ］ of rotor ［ 10 ］, meanwhile also 100-150 medium order is added from feed port one by one.At this moment after ore pulp feeds, at any time with the medium fusion, medium is under the effect of the inherent graded blade of screen drum ［ 16 ］［ 13 ］, medium rolls and beats screen cloth generation vibration, act on mutually with near mesh particle between wearing and tearing sieve crack, prevent that it from stopping up sieve aperture, thereby the quantity that can lead to sieve aperture is under the dynamic balance state, realize graded operation.

Oversize continues medium to stay on the sieve during by scalping tube ［ 25 ］, by dig wooden dipper ［ 17 ］ with medium collection to central tube ［ 12 ］ (see figure 2), medium turns back to again to the ore deposit end again, thereby realizes medium effect from closed circuit circulation in machine.

Undersize by wide-meshed screen ［ 25 ］ is the sand return thing, this sand return thing enters rotor overcoat ［ 9 ］, under the promotion of internal helical blades ［ 8 ］, be pushed into sand return and dig wooden dipper place (see figure 3), digging wooden dipper ［ 18 ］ as shown in Figure 3 collects inside spin ore discharge pipe ［ 7 ］ with sand return sand return is located to discharge by sand return outlet ［ 4 ］, these sand return ore pulps return ore mill again and reface, and constitute the closed circuit circulatory system in grind grading loop like this.Sand return then constitutes the open-circuit grinding hierarchy system if no longer return ore mill after discharging from gape ［ 4 ］.

The utility model medium supination grader is characterized in that:

A. medium supination grader is to be connected with inside spin sand return tube by universal coupling by reductor, and drives rotor by inside spin sand return tube, and scalping tube, screen drum, central tube and rotor overcoat are rotated synchronously;

B., internal helical blades is installed in the inside spin sand return tube, the internal classification helical blade is installed in the screen drum, establish helical blade in the rotor overcoat, be provided with in the scalping tube that wooden dipper is dug in sand return and medium digs the wooden dipper device;

C. add some media and ore pulp fusion, move, enter medium and dig wooden dipper, by self-loopa in the low-angle dip central tube realization machine along screen drum, scalping tube direction.

In sum, the utility model can realize giving continuously the function of ore deposit, sand return continuously, continuous overflow and continuous media circulation.Also have simultaneously the function that sand return promotes, therefore just can realize constituting closed circuit feature with ore mill without sand pump.It should be noted owing to have these functions, use to have simple in equipment so it can replace spiral classifier, in light weight, install and use characteristics easy to maintenance.This equipment all can use on the graded operation in ore dressing plants such as coloured, black, building materials, chemical industry, has the wide feature of usage range.

Embodiment 1:

Adopt the version of medium supination grader of the present utility model, made a model machine, its following (unit: mm) of basic specification

Diameter phi 1200, effective length I=2400, total length L=6500, pitch s=125, helical pitch m=500,

Wooden dipper width B 1=180, B2=200, B3=250 are dug in sieve crack δ=0.75

Select factory and the supporting use of φ 1500 * 3000 ball mills at certain iron ore, partition size 0.3mm classification efficiency can reach 65-75%, when the grinding machine disposal ability is increased to 9-12 ton/platform during by original 7 tons/platform.The classification that processing is contained the magnetic iron ore of mud plays the desliming effect, can reduce the argillization in the grinding machine, improves grinding efficiency.

Embodiment 2:

Adopt Che He ore dressing plant and the ore mill supporting use of the model machine of medium supination grader of the present utility model in Guangxi Da Chang mineral bureau, overground to solving cassiterite, sulphide ore is owed mill and has been received obvious effects.This cassiterite ore grinding is crossed and pulverized is a great problem that perplexs production for many years, and in order to address this problem, various screening plants were once tried out at the scene, and because of cassiterite ore deposit ore grinding is corner angle later on, near mesh particle that is wedge shape is many, therefore test has all been failed because of sieve pore blockade.And adopt the continuous industry test of medium supination grader of the present utility model, and obtain following technical indicator: during disposal ability 8-14 ton/platform, (sieve is throughput down) classification efficiency 60-70%, partition size 0.3mm.Be not difficult to find out by index, reduced refaced crushing phenomenon and derichment phenomenon, improve the disposal ability and the classification efficiency of grinding machine, reach the purpose that cuts down the consumption of energy.

Claims

1, the utility model is a kind of ore dressing with medium supination grader, this device be characterised in that by reductor [1], rotor [10], inside spin sand return tube [7], central tube [12], screen drum [16], rotor overcoat [9], scalping tube [25], medium dig wooden dipper [17], sand return is dug critical pieces such as wooden dipper [18] and medium and is interconnected to constitute.

2, medium supination grader according to claim 1, it is characterized in that rotor ［ 10 ］ is made up of inside spin sand return tube ［ 7 ］, central tube ［ 12 ］, screen drum ［ 16 ］ and rotor overcoat ［ 9 ］, internal classification helical blade ［ 13 ］ is set in the screen drum ［ 16 ］, and the left side of rotor ［ 10 ］ is that the screen drum of scalping tube ［ 25 ］, right-hand part is a fine screen mesh.

3, medium supination grader according to claim 1 is characterized in that rotor overcoat ［ 9 ］ establishes internal helical blades ［ 8 ］.

4, medium supination grader according to claim 1 is characterized in that being provided with in the scalping tube ［ 25 ］ sand return and digs wooden dipper ［ 18 ］ and medium and dig wooden dipper ［ 17 ］ device.

5, medium supination grader according to claim 1 is characterized in that it is that 20-25 millimeter, length are the small-sized rod iron of 25-40 millimeter that medium adopts diameter, and quantity is 100-150.

6, medium supination grader according to claim 1 is characterized in that screen drum ［ 16 ］, scalping tube ［ 25 ］ are located on the identical drum surface of diameter, adopt two kinds of different screen clothes to be fixed on the screen drum.