CN2225303Y

CN2225303Y - Labyrinth type ball mill

Info

Publication number: CN2225303Y
Application number: CN 95200229
Authority: CN
Inventors: 吉源
Original assignee: Individual
Current assignee: Ji Yuan
Priority date: 1995-01-01
Filing date: 1995-01-01
Publication date: 1996-04-24
Anticipated expiration: 2005-01-01

Abstract

The utility model relates to a labyrinth type ball mill which belongs to the ball mill used for ore milling in building material industry, metallurgy industry, etc. A labyrinth type partition plate is adopted in the mill, and labyrinth type wind holes which are used for stopping material and ventilating and are composed of a plurality of wind inlet holes, wind outlet holes and diversion holes are respectively arranged on a subboard and a motherboard. The best height of the subboard is not greater than the vertical height of a grinding body after surfacing in a milling barn near the material input end of the mill and the subboard and the motherboard. The ball mill can extend the stay time of the material in the mill, and can eliminate the invalid zone of a tail barn. The utility model can achieve the purposes of high production, high thinness, simple structure, less investment and high efficiency.

Description

Labyrinth ball mill

The utility model belongs to the invention of ore grinding usefulness tube ball mill in the industries such as building materials, metallurgy.

Existing ball mill is made up of cylindrical shell, liner plate etc., and individual layer partition panel and tabular mill tail sheet plate is installed in the cylindrical shell.Improve mill hourly output in producing use, regular meeting causes its fineness chap that goes out to wear into product, is to guarantee finish fineness, cause that again output descends, and fineness is difficult for stable control.Formed raising output and caused the fineness chap, reduced fineness and cause that again output decline energy consumption increases this vicious circle.Trace it to its cause, material time of staying in mill generally is constant, strengthens feeding capacity material flow will be increased, and causes material time of staying in mill to reduce, thereby " running thick ".In addition, at tail storehouse exit region, pole-changing is thin owing to material, good fluidity, and flow velocity is fast.Material is being wanted much less near sieve plate zone, tail storehouse with tail sheet same one period regional time of staying of plate comparing away from mill.By to the screen analysis curve analysis, the grinding of material in this zone is poor efficiency or invalid.Entering grinding machine, also can obviously to observe this zone (section) ratio of grinding media to material relatively large.This zone is referred to as " district of losing efficacy ".

For addressing the above problem, No. 1024101 Soviet Union's works certificates of the former Soviet Union (seeing phase in 83 on June 23, the 23rd " invention, creation, production piece, trade mark " circular) disclose a kind of toroidal membrane perpendicular to the cylindrical shell longitudinal axis, its technical characterictic is that the internal diameter of a part of dividing plate is less and with holes in the dividing plate, all the other dividing plate internal diameters are bigger, not with holes, be entity.With holes and the alternate installation of dividing plate not with holes.

In addition, on April 20th, 1994 also disclose a kind of name at the Chinese patent communique and be called " improvement of grinding machine partition panel and grate plate " (patent No.: ZL93216261.4) this utility model.

These two pieces of documents, though the problem that above-mentioned conventional mill exists has been made bigger improvement, but brought a disadvantage that can not be ignored, promptly all exist the blind plate of some or solid plate not with holes, to reduce limited available ventilation area in the mill like this, increase flowing resistance, weakened mill inner ventilation.This phenomenon is more obvious in the grinding machine of natural exhaust.

As everyone knows, the ball mill mill inner ventilation produces greatly influence to the output and the quality of product.When winter-spring season mill feed material moisture content is slightly high, can produce a large amount of water vapours in the grinding process, cause " sticking with paste mill ".

Secondly, summer can be because ambient temperature and mill feed material (especially grog) temperature be higher during pulverizing cement, add and produce a large amount of frictional heat in the grinding process, cause extreme temperatures in the mill, deficiency in draught, can not in time take away these heats, cause gypsum dehydration, cause out mill cement " false set ".

Once more, the another effect of mill inner ventilation is that the fine powder of part in the preceding storehouse is brought to the mill tail, and phenomenon that grinding " is crossed " in minimizing corase grind storehouse increases output.Obviously, deficiency in draught can not better be realized this purpose.

The utility model purpose is that a kind of labyrinth ball mill will be provided, this confidential vicious circle of finding the solution determine traditional ball mill output and fineness, i.e. fineness chap when improving output, desire reduces fineness, must reduce output again, and the contradiction that power consumption rises again, under the situation that reduces fineness, increase substantially output, this grinding machine is reached eliminate tail storehouse " district of losing efficacy ", stop material flowing fast in the tail storehouse, make in its nearly discharge end zone material ball ratio and the storehouse and be close away from discharge end zone material ball ratio, improve " district of losing efficacy " grinding efficiency, and will satisfy the inner necessary conventional ventilation of grinding machine

The mode of finishing of the present utility model can form existing ball mill transformation.Labyrinth type partition panel, labyrinth type collet, labyrinth type mill tail sheet plate are installed in its mill, and they form mother baby plate by fan-shaped daughter board and fan-shaped motherboard combination respectively, and some labyrinth type wind hole is arranged on daughter board and motherboard.

Use the utlity model has following advantage and effect, and it can prolong material time of staying in mill, fully absorbs abrasive body grinding merit, solves output and the long-standing contradiction of fineness in the grinding machine.It has also kept tail storehouse (section) ratio of grinding media to material constant, has eliminated " district of losing efficacy ", has improved mill inner ventilation simultaneously, reduces flowing resistance, thereby has increased ventilation.This machine had both adapted to one-level and had driven stream mill, also adapted to closed circuit mill, but new mechanism make, but yet retrofitting of used machine is not only applicable to the grinding machine of existing individual layer partition panel in transformation, be applicable to the ball mill that uses double-layered isolating plate and other form partition panels, mill tail sheet plate yet.

The utility model most preferred embodiment will be described in detail in conjunction with the following drawings:

Figure (1) is a labyrinth ball mill general assembly schematic diagram.

Figure (2) is a labyrinth type partition panel front view in the labyrinth ball mill.

Figure (3) is a labyrinth type partition panel A-A cutaway view among the figure (2).

Figure (4) is a labyrinth type collet front view.

Figure (5) is a labyrinth type collet B-B cutaway view among the figure (4).

Figure (6) is a labyrinth type mill tail sheet plate front view.

Figure (7) is a labyrinth type mill tail sheet plate C-C cutaway view among the figure (6).

Figure (8) is the another kind of modified that labyrinth type wind hole adopts concentric circles to distribute on the mother baby plate in the labyrinth ball mill.

Figure (9) is a labyrinth type partition panel D-D cutaway view among the figure (8).

Figure (10) is the radiation wire distribution schematic diagram in labyrinth type wind hole in the labyrinth ball mill.

Figure (11) is a labyrinth type partition panel E-E cutaway view among the figure (10).

By figure (1) as seen, labyrinth ball mill is made up of feed end (1), cylindrical shell (2), liner plate (3), labyrinth type partition panel (4), bolt (5), labyrinth type collet (6), labyrinth type mill tail sheet plate (7), discharge end (8) etc.Referring to figure (2), figure (3) as seen, labyrinth type partition panel (4) is made up of a shorter plank plate (10) and a higher plate motherboard (9), and motherboard directly links to each other with cylindrical shell, and daughter board is to fasten as one by bolt and motherboard.Daughter board has some fresh air inlets on (10), motherboard has some exhaust vents on (9), the enterprising exhaust vent of the mother baby plate position certain distance that staggers mutually, have pod apertures (11) on daughter board (10) or the motherboard (9), it is communicated with fresh air inlet, exhaust vent on daughter board and the motherboard, and the three constitutes labyrinth type wind hole jointly.Advancing the exhaust vent hole width is 3mm to 10mm.In addition referring to figure (4), figure (5), figure (6), figure (7), equally as seen, labyrinth type collet, mill tail sheet plate also are made up of daughter board and motherboard respectively, they daughter board and motherboard on also have the common labyrinth type wind hole that constitutes of fresh air inlet, exhaust vent and pod apertures, hole width also is 3mm to 10mm.The effect in this labyrinth type hole is that resistance material ventilates.The height of their daughter boards is to be advisable less than contiguous mother baby plate and near the vertical height that forms after abrasive body is paved in the feeding end mill storehouse.Labyrinth type collet mother baby plate height equates.Referring to figure (8), figure (9) as seen, in this machine on the mother baby plate distribution in labyrinth type wind hole be good with concentric circles, also radiate the wire distribution.

Have on the mother baby plate overlapping region the labyrinth type hole on labyrinth type partition panel, mill tail sheet plate, all the other scallop branches have straight-through shape comb hole on the motherboard, and hole width is 2mm to 12mm.

In manufacturing and installation process, for alleviating single-piece weight and simplifying casting technique, can make mother baby plate respectively, in mill, they are tightened to one then by bolt.To large-sized grinder, can will open straight-through shape hole and two parts separate machined moulding of labyrinth type hole on the motherboard, assembling in mill again.This grinding machine is in use according to the concrete process conditions of each factory, can only use certain part or two parts in labyrinth type collet, partition panel, the mill tail sheet plate, also can mix into single storehouse or compartment mill, to realize that high yield, low consumption are purpose with other form partition panels or mill tail sheet plate.

Claims

1, a kind of ball mill is made up of feed end, cylindrical shell, liner plate etc., it is characterized in that being equipped with in the mill labyrinth type partition panel, labyrinth type collet, labyrinth type mill tail sheet plate, and they are made up of fan-shaped mother baby plate respectively, and some labyrinth type wind hole is arranged on the mother baby plate.

2, labyrinth ball mill according to claim 1 is characterized in that having on the fan-shaped mother baby plate fresh air inlet, exhaust vent, fresh air inlet and the exhaust vent position certain distance that staggers mutually, and hole width is 3mm to 10mm.

3, labyrinth ball mill as claimed in claim 1 or 2 is characterized in that having pod apertures on daughter board or the motherboard, and he is communicated with fresh air inlet, exhaust vent, and the three constitutes labyrinth type wind hole jointly.

4, as labyrinth ball mill as described in the claim 3, the height that it is characterized in that fan-shaped daughter board is advisable with the vertical height of paving the back less than abrasive body in contiguous this mother baby plate and the storehouse of close mill with the grinding machine feeding end and forming.

5, labyrinth ball mill according to claim 1, it is characterized in that in labyrinth type partition panel and the labyrinth type mill tail sheet plate, fan-shaped mother baby plate has labyrinth type wind hole on the overlapped zone, and remaining fan-shaped part should have straight-through shape comb hole on the motherboard, and hole width is 2mm to 12mm.

6, labyrinth ball mill according to claim 1 is characterized in that fan-shaped mother baby plate height equates on the labyrinth type collet.

7, labyrinth ball mill according to claim 1 is characterized in that the distribution in labyrinth type wind hole on the mother baby plate is a concentric circles, also can be that the radiation wire distributes.