CN2593903Y - Rib shaped ball mill - Google Patents

Abstract

The utility model relates to a rib-shaped ball mill, which comprises a cylindrical cavity body and is characterized in that an inner wall of the cavity body is fixedly provided with six to twelve roots of full-length ribs which are arranged in parallel with a rotary shaft. The production ability of the ball mill is increased, and the utility model can be used for producing flaky metal powders with super minute particle diameters and can not cause combustion or explosion especially in making zinc or aluminum powders with high safety.

Description

Muscle shape ball mill

Technical field

The utility model relates to a kind of ball mill, particularly a kind ofly is used to process ball mill ultra-thin, ultramicrofine metallic flakes, can be used for zinc, aluminium, copper alloy, ashbury metal and pure iron powder film-making processing.

Background technology

Ball mill processing is adopted at the ultrafine metal powders end usually, has purposes widely.With the zinc powder is example, and zinc flake is the important source material of environmental protection coating material, and what zinc powder production was at present generally adopted is atomization, though its particle diameter can reach ultramicro powder, is shaped as graininess, with being capped thing with a contact, tack, hiding rare are all not good enough, and the protection life-span is generally in 10 years; Another kind is wet method processing, owing to be working media with the solvent naphtha, grading is poor, and the powder footpath is inhomogeneous, and the surface is surrounded by one deck solvent naphtha, affine with other material in conjunction with poor, and the market relevance grade is narrow.And there is certain safety problem in existing ball ball machine with dry process zinc powder and aluminium powder the time.

This is actually because the grinding that existing ball mill does not reach flaky metal powder requires to cause, existing ball mill, be built-in with steel ball and metal powder material to be ground, when the ball mill housing rotates, drive ball and expect up, upset landing during to certain altitude, when ball mill reached certain rotating speed, ball and material were done the sub-elliptical motion, are fully overturn, make ball and ball, ball add grinding, realize ultramicrofine metal dust processing the material bump.Traditional ball mill comprises two kinds in circular cross-section and octagonal cross section, and accompanying drawing 4 is the working state schematic representation of orange grinding machine, and accompanying drawing 5 is the schematic diagram of octagonal ball mill, and the working speed interval of orange grinding machine is $n\&GreaterEqual;\frac{32}{\sqrt{D}}~\frac{42.4}{\sqrt{D}}$ (wherein D is the effective diameter of ball mill, is unit with rice), and the rotating speed interval in the practice of octagonal ball mill is $n\&GreaterEqual;\frac{32}{\sqrt{D}}~\frac{42.4}{\sqrt{D}},$ The number of times that above-mentioned rotating speed all reaches in per minute and, work as rotating speed $n<\frac{30}{\sqrt{D}}$ The time, then machine endosphere and material are done the landing campaign, also are operational failure.Under the routine work situation, when powder was clashed into, extension and fragmentation were almost carried out simultaneously, and product thickness is difficult to thinning, and the radius-thickness ratio of particle diameter stack pile can't meet the demands usually below 15; On the other hand, because speed of service height adds that steel ball size is big, ball is the instantaneous temperature height when impacting, and ball and ball impact easily produce spark, cause the burning and the blast of powder easily, and when particularly processing the zinc-aluminium powder, danger is bigger.

Summary of the invention

The utility model purpose provide a kind of can be at the muscle shape ball mill of operate as normal under the slow-speed of revolution, it has higher security, and can process the high laminar metal ultramicro powder of radius-thickness ratio.

For achieving the above object, the technical solution adopted in the utility model is: an effective reinforcement shape ball mill, comprise columniform cavity, and on cavity inner wall, be fixed with 6 to 12 elongated ribs, the arranged direction of rib and shaft parallel.

In the technique scheme, rib is fixed on the cavity inner wall, can adopt welding or screw to fix, and the distribution of rib is suitable evenly to be distributed as.

In the technique scheme, the cross sectional shape of described rib can be rectangle, also can be trapezoidal, can also be that the bottom, cross section is a rectangle, and the top is an arc, perhaps other similar shape.

With rib top central authorities to the distance of going to the bottom is the muscle height, with rectangle wide or trapezoidal in wide be that muscle is wide, then the muscle height is 5% to 10% of a ball mill effective diameter, muscle is wide to be high 0.5 times to 1.2 times of muscle.

Usually, ball mill is used for metal dust and adds man-hour, and its effective diameter interval is at 0.6～1.2 meter, and concrete rib configuration quantity, shape and size should comprehensively define according to the diameter and the material of equipment.

The utility model is in when work, can select for use usually diameter in the single-stage of φ below 12 than steel ball, working speed $n\&le;\frac{28}{\sqrt{D}},$ Wherein, D is the effective diameter (is unit with rice) of ball mill, this is the range of speeds of existing ball mill operational failure, its working mechanism is: when muscle shape ball mill rotates, ball, it is up that material is made circular motion at random, when ball and material rise to certain altitude, because rotating speed is low, up kinetic energy deficiency, then ball and material inertia glide, and rib is with ball and material down to the muscle surface layer, and under the support of rib, it is up still to make circular motion, thus, be higher than the ball of muscle face and material in the way that glides, produced reverse movement with the ball and the material of muscle face one deck, its power adds the gravity effect of steel ball, make powder be extruded extension, the mode that makes dumpling wrappers at ordinary times with us is approximate, makes that like this metal dust becomes sheet by graininess, and even thinning thinning again---the film-making form of the thinning again of rupturing naturally.Go round and begin again with upper type, ultra-thin, ultramicrofine metal dust promptly is made of.

On the other hand, on-stream some ball all the time of the utility model and material are taken out of the aspect of ball and material by muscle, and are undermost ball material, trickle down when these ball material are higher than the axis rear-inclined, powder flies upward, and this is muscle shape ball mill can stir material when low speed another big characteristics.Thus, the powder that flies upward can be gone out axis hole by airflow blow and suction, and the hierarchy system that is in series through pipeline by micropowders grader, whirlwind clarifier, dust cleaning case and blower fan filters out the product that needs with specification.

Because the technique scheme utilization, the utility model compared with prior art has following advantage:

1. because the utility model is provided with rib on the ball mill internal chamber wall, improved the film-making ability of ball mill, the radius-thickness ratio of its product cut size stack pile of traditional ball mill is usually below 15, and the product that adopts the utility model to produce, radius-thickness ratio is about 50～100, we oppose than test with the octagonal ball mill, the technology appropriateness is near the technological parameter of muscle shape ball mill, film-making thickness reaches about 1 micron, and obtaining powder sheet thickness at 0.1 to 0.3 micron with the utility model, particle diameter is at 5～8 micrometer ranges;

2. because the setting of rib, working speed of the present utility model $n\&le;\frac{28}{\sqrt{D}},$ Be lower than the working speed of ball mill in the prior art, can select for use single-stage less than φ 12 than steel ball, thereby operating temperature be low in the ball mill, is difficult for producing spark and causes burning or blast, safe in utilization;

3. the utility model still can make powder fully stir and fly upward when lower-speed state, is beneficial to the sucking-off classification, has guaranteed the low speed continuity of work down.

Description of drawings

Accompanying drawing 1 is the cross section structure schematic diagram of the utility model embodiment one;

Accompanying drawing 2 and accompanying drawing 3 are the structural representation of ball mill when two different operating positions;

Accompanying drawing 4 is the cross section structure schematic diagram of existing orange grinding machine;

Accompanying drawing 5 is the cross section structure schematic diagram of existing octagonal ball mill.

Wherein: [1], cavity; [2], powder; [3], steel ball; [4], rib.

The specific embodiment

Below in conjunction with drawings and Examples the utility model is further described:

Embodiment one: referring to accompanying drawing 1 to an effective reinforcement shape ball mill shown in the accompanying drawing 3, draw together columniform cavity 1, cavity 1 internal diameter is 0.6 meter, on cavity 1 inwall, be evenly distributed with 6 elongated ribs 4, rib 4 cross sections are rectangle, and muscle is high 4 centimetres, and muscle is wide 3 centimetres, the arranged direction of rib 4 and shaft parallel, each rib 4 is fixedly welded on cavity 1 inwall.

Shown in accompanying drawing 2 and accompanying drawing 3, when the muscle shape ball mill of present embodiment rotates, it is up that steel ball 3 and powder 2 are made circular motion at random, when steel ball 3 and powder 2 rise to certain altitude, because rotating speed is low, up kinetic energy deficiency, then steel ball 3 and powder 2 inertia glide, and rib 4 is with steel ball 3 and powder 2 down to the muscle surface layer, and under the support of rib 4, it is up still to make circular motion, thereby compare with the octagonal ball mill with existing circular, form brand-new working method, can under lower rotating speed, work, obtained the ultra tiny metal dust of sheet simultaneously.

Two: one effective reinforcement shapes of embodiment ball mill, comprise columniform cavity, the cavity internal diameter is 1 meter, be evenly distributed with 8 elongated ribs on cavity inner wall, the rib cross section is trapezoidal, and muscle is high 8 centimetres, hem width is 5 centimetres on the rib, 7 centimetres of following hem widths, the arranged direction of rib and shaft parallel, each rib is screwed in cavity inner wall.

Three: one effective reinforcement shapes of embodiment ball mill, comprise columniform cavity, the cavity internal diameter is 1 meter, on cavity inner wall, be evenly distributed with 10 elongated ribs, the rib cross section is following rectangle, upper end circular shape, and muscle is high 10 centimetres, and the rectangle width is 6 centimetres, the arranged direction of rib and shaft parallel, each rib is screwed in cavity inner wall.

Claims (5)

1. an effective reinforcement shape ball mill comprises columniform cavity [1], it is characterized in that: be fixed with 6 to 12 elongated ribs [4] on cavity [1] inwall, the arranged direction and the shaft parallel of rib [4].

2. muscle shape ball mill as claimed in claim 1 is characterized in that: the cross sectional shape of described rib [4] is a rectangle.

3. muscle shape ball mill as claimed in claim 1 is characterized in that; The cross sectional shape of described rib [4] is trapezoidal.

4. muscle shape ball mill as claimed in claim 1 is characterized in that: the bottom, cross section of described rib [4] is a rectangle, and the top is an arc.

5. as claim 2 or 3 or 4 described muscle shape ball mills, it is characterized in that: with rib [4] top central authorities to the distance of going to the bottom is the muscle height, with rectangle wide or trapezoidal in wide be that muscle is wide, then the muscle height is 5% to 10% of a ball mill effective diameter, muscle is wide to be high 0.5 times to 1.2 times of muscle.

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