CN201799305U

CN201799305U - External circulation type vertical mill

Info

Publication number: CN201799305U
Application number: CN201020513383XU
Authority: CN
Inventors: 崔信明
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-09-02
Filing date: 2010-09-02
Publication date: 2011-04-20
Anticipated expiration: 2020-09-02

Abstract

The utility model relates to a material-milling device for materials of metallurgy, mining and building industries, in particular to an external circulation type vertical mill. The external circulation type vertical mill mainly comprises a powder-selecting part and a milling part, wherein a powder-selecting machine and a milling roller of the powder-selecting part form a vertical structure in a shell so as to be combined into the vertical mill. The vertical mill is provided with two air inlets, wherein an upper air inlet is arranged at the lateral side of the powder-selecting machine, and a lower air inlet is arranged at the lower part of a milling disc of the vertical mill. Thus, materials can be subject to mechanical external circulation, thereby eliminating the defects of the traditional roller type mill, lowering the air-based power consumption, greatly reducing the energy consumption for air-based lifting in the mill, ensuring the operating stability of the mill and achieving the obvious energy-saving effect.

Description

The outer circulation type Vertical Mill

Technical field

The utility model relates to the material grinding device of a kind of metallurgical mine, building material industry, particularly relate to material that an a kind of grinding crosses mainly by the mechanical type outer circulation, major part selects powder directly to advance the grinding roller of powder concentrator with wind, and powder concentrator and means of abrasion are presented down the outer circulation type Vertical Mill of integral type vertical structure.

Background technology:

Traditional vertical roller grinder is by gas most of material to be promoted in the powder concentrator by material vane place, and the power consumption of gas is big; If means of abrasion and powder concentrator implementation is split type, return powder with on the materials flow form feeding mill, can cause the decline of grinding usefulness, can increase energy consumption equally, and the Process configuration more complicated.

Summary of the invention:

Goal of the invention of the present utility model is big, the grinding usefulness decline of power consumption at traditional vertical roller grinder gas, increase the deficiency of energy consumption, a kind of power consumption of gas in mill that both reduced is provided, do not influence grinding usefulness, Remarkable Energy Saving outer circulation type Vertical Mill simultaneously again.

Realize above-mentioned purpose by the following technical solutions: a kind of outer circulation type Vertical Mill, comprise housing, powder selecting part divides and means of abrasion, the powder concentrator that described powder selecting part divides and the grinding roller of means of abrasion are up and down, and vertical structure is positioned at enclosure interior, the air inlet of described Vertical Mill divides two parts up and down, last air inlet is arranged on the powder concentrator side, and following air inlet is arranged on the bottom of Vertical Mill mill.

Adopt technique scheme, compared with prior art, the most of material of outer circulation type Vertical Mill promotes by mill outer circulation elevator, the powder concentrator of side air inlet is arranged on the grinding roller, the mill mode of returning of the meal that powder concentrator is selected is identical with traditional Vertical Mill, sub-fraction wind is entered in the mill by the mill bottom, and most of wind enters from the powder concentrator side.Material has been eliminated the defective of traditional roller mill by the mechanical type outer circulation, has reduced the strength power consumption, has reduced the power consumption by strength lifting in mill significantly, has guaranteed the stability of grinding machine operation, and energy-saving effect is remarkable.

Description of drawings:

Fig. 1 is an overall structure schematic diagram of the present utility model.

Fig. 2 is the utility model powder concentrator air inlet schematic diagram.

Fig. 3 is a process chart of the present utility model.

Among the figure, cage rotor 1, spreading disk 2, transmission support platform 3, vertical shaft 4, fine powder discharge pipe 5, tremie pipe 6, spout 7, buffer board 8, guide vane 9, last air inlet 10, vertical blade 11, horizontal baffle 12, meal discharge bucket 13, grinding roller 14, following air inlet 15, mill 16, circularly enhancing machine 17, gas 18, discharging opening 19, air outlet 20.

The specific embodiment:

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

See Fig. 1, Fig. 3, in the present embodiment, mainly by selecting powder and grinding two parts and form, the powder selecting part branch mainly is made of powder concentrator this outer circulation type Vertical Mill, and means of abrasion mainly is made up of grinding roller 14 and mill 16.Powder concentrator is positioned at the top of grinding roller 14, is up and down structure with grinding roller 14 and is installed as one and is positioned at housing and is combined into Vertical Mill.The spout 7 and the tremie pipe 6 of Vertical Mill are one, are positioned at top one side of powder concentrator.Fine powder discharge pipe 5 is positioned at the top of selecting blower fan.Meal discharge bucket 13 is arranged on the bottom of powder concentrator.The air inlet of Vertical Mill is divided into two parts up and down, and last air inlet 10 is arranged on the powder concentrator side, and following air inlet 15 is arranged on the bottom of grinding roller 14, mill 16.This set makes air intake divide two parts up and down, and sub-fraction wind (following air intake) is entered in the mill around mill 16 by the following air inlet 15 of mill 16 bottoms, and most of wind (going up air intake) enters from the last air inlet 10 of powder concentrator side.The air outlet 20 of Vertical Mill is arranged on the axis of powder concentrator.Circularly enhancing machine 17 is positioned at the outside of Vertical Mill.Arrow shown in Fig. 1 is represented the trend of wind, and among Fig. 3 shown in the arrow is the direction and the discharging direction of air-flow 18.

See Fig. 1, Fig. 2, the main body of powder concentrator is a spiral case, the both sides of this spiral case are provided with two tangential air intake passages that are mutually 180 degree at least, the both sides of present embodiment spiral case be two be mutually 180 the degree be the tangential air intake passage of one with last air inlet 10, when if the Vertical Mill specification is big, also can makes three and be mutually 120 degree or a plurality of air intake passages that along the circumferential direction evenly distribute.Be provided with the cage-type rotor 1 that is fixed on the speed governing rotary vertical shaft 4 in the housing, cage-type rotor 1 is by evenly the vertical blade 11 and the horizontal baffle 12 of substep are formed along circumference.Be with one outside the cage-type rotor 1 and enclose the guide vane 9 that certain angle (can adjust as required) arranged that is fixed on the housing, spreading disk 2 is arranged on the top of cage-type rotor 1, and spreading disk 2 is an one with cage-type rotor 1, and the outer ring of spreading disk 2 is provided with buffer board 8.

Powder concentrator housing top cover is provided with frame and transmission support platform 3, is used for supports main shaft and motor, reductor.

The course of work of the present utility model:

Material is fed on the spreading disk 2 by spout 7 and tremie pipe 6, the rotation spreading disk 2 with material to around dish out, lose kinetic energy and change direction through buffer board 8 bumps, freely fall to graded region along guide vane 9 inboards equably, form a continuous vertical material curtain, the cage-type rotor 1 that rotates makes air-flow produce outside centrifugal force by vertical blade 11, with from the tangential centripetal force generation effect jointly that imports and produce through the eddy airstream of the inside rotation of guide vane 9 rectifications of air inlet, form a compulsory eddy current classification flow field, material produces classification in the classification flow field in dropping process, qualified fine powder passes vertical blade 11 with air-flow 18 and enters cage-type rotor 1, discharge through fine powder discharge pipe 5 again, fail to be fallen on the Vertical Mill mill 16 as meal by the part that air-flow is taken away, mill 16 rotations drive grinding roller 14 and rotate, material is moved to mill 16 edges by action of centrifugal force, and pulverized by engaging-in grinding roller 14 bottoms, material is fallen the chamber that gathers materials by the material vane behind mill 16 edges, discharge outside the mill by material scraping plate and discharging opening 19, after belt conveyor and 17 liftings of bucket type circularly enhancing machine, in spout 7 feeding mills.Constitute outer circulation.

Claims

1. outer circulation type Vertical Mill, comprise housing, powder selecting part divides and means of abrasion, it is characterized in that, the powder concentrator that described powder selecting part divides and the grinding roller of means of abrasion are up and down, and vertical structure is positioned at enclosure interior, the air inlet of described Vertical Mill divides two parts up and down, and last air inlet is arranged on the powder concentrator side, and following air inlet is arranged on the bottom of Vertical Mill mill.

2. outer circulation type Vertical Mill according to claim 1, it is characterized in that, the main body of described powder concentrator is a worm frame, the both sides of this spiral case are provided with two tangential air intake passages that are mutually 180 degree at least, be provided with the cage-type rotor that is fixed on the speed governing rotary vertical shaft in the housing, this cage-type rotor is made up of vertical blade and horizontal baffle, the cage-type rotor periphery is provided with one and encloses the guide vane that is fixed on the housing, spreading disk is arranged on the top of cage-type rotor, with cage-type rotor be one, the spreading disk outer ring is provided with buffer board.