CN201200909Y - A dry ball mill classification equipment - Google Patents

Abstract

The utility model is a dry ball mill classification equipment, which consists of a transmission mechanism, a feeder, a stirring shaft, a ball mill crushing chamber, a classifier host I, a classifier host II, a cyclone collector, a bag filter, an induced fan, and an air inlet. constitute. The lower end of the feeder is connected with the ball mill crushing chamber, the center of the ball mill crushing chamber is the stirring shaft, which is connected with the transmission mechanism, and the upper end of the ball mill crushing chamber is connected with the main machine of the classifier I, the main machine of the classifier I, the main machine of the classifier II, the cyclone Collector, bag dust collector, and induced draft fan are connected through the air duct in turn, and the combination of dry ball mill and air classifier is used to crush and pre-classify the objects. The particle shape of the pulverized micropowder particles of the utility model is unique, which is very suitable for grinding And cutting, its shape is not as round and sharp as the jet mill, and it is also different from the long strips and needles after the Raymond mill is crushed, but the same area with sharp corners, suitable for cutting crystals The special cutting material used for round cells, and the single number output is as high as 75%.

Description

A dry ball mill classification equipment

Technical field

The utility model relates to a mechanical device, in particular to a dry ball mill classification device.

Background technique

Existing micro-powder crushing equipment includes: 1. Jet mill: high output, yield up to 75%, the silicon carbide micro-powder particles broken out have more equal-area shapes, accounting for more than 90%, round shape, no sharp corners, and There are pitted cracks in the particles, which is not conducive to cutting. 2. Raymond mill: high output, only 65% yield, broken silicon carbide micropowder particles, less equal-area shape, accounting for more than 50%, and more needle-shaped, flake-shaped, irregular-shaped particles, not resistant grind. 3. Wet ball mill: The output is low, the yield is only 30%, the over-grinding is serious, the particle shape is good, there are many equal-volume shapes, and there are sharp corners.

The dry ball mill classification equipment of the utility model solves the above defects. The combination of the dry ball mill and the airflow classifier is used to crush and pre-classify the objects. consumption, and the most important point is to overcome the above three equipment defects. The pulverized micro powder particles have a unique shape, which is very suitable for grinding and cutting. Raymond mill crushed long sheet, needle-shaped, but equal-area shape with sharp corners, suitable for cutting wafer cells used as a special blade, and the output of single number up to 75%.

Contents of the invention

In order to solve and overcome the deficiencies of the prior art, the utility model provides a dry ball mill classification equipment, which can increase the output and yield of single-number silicon carbide micropowder, change the particle shape, and improve the cutting force and durability of the micropowder particles. The technology has the characteristics of large output and low energy consumption.

The technical solution adopted by the utility model to solve its technical problems is: the utility model adopts a combination of a dry ball mill and an airflow classifier to crush and pre-classify objects, and is composed of a transmission mechanism, a feeder, a stirring shaft, and a ball mill crushing chamber. , Classifier host I, classifier host II, cyclone collector, bag filter, induced draft fan, and air inlet. The lower end of the feeder is connected with the ball mill crushing chamber, the center of the ball mill crushing chamber is the stirring shaft, and the stirring shaft is connected with the transmission mechanism, the upper end of the ball mill crushing chamber is connected with the classifier host I as a whole, the classifier host I, the classifier host II, the rotary The collector, bag filter and induced draft fan are connected in turn through the air duct. The main motor drives the stirring shaft through the belt device to drive the stirring arm to move at high speed, forcing the medium ball in the grinding chamber and the material to be ground to move irregularly, and the medium ball and the material collide, shear and rub against each other, so as to achieve the material Super fine grinding. When working, the silicon carbide raw material enters the cavity from the feeding port, and after grinding and crushing, under the action of the induced draft fan, the airflow enters from the air inlet and is inhaled in a tangential direction, blowing up the fine powder in the grinding area and sending it into the chamber through the cylinder. Classifier host 1 distributes. Coarse particles fall into the crushing cavity along the wall of the cylinder and are re-crushed. The fine particles enter the classifier host II to be sorted again. At this time, the speed of the classifier is adjusted, and the fine powder that does not meet the requirements is sent to the cyclone and bag filter for collection, and the fine powder collected from the first-stage discharge port is the required single-number qualified product.

The beneficial effect of the utility model is that the particle shape of the crushed fine powder is unique, the equal-area shape has sharp angles, the single particle size number is large, and the output is high; the equipment has low energy consumption, and every 1 ton of material crushed can save 1000 kWh of electricity compared with jet mill crushing; The noise is low, the noise of the equipment is less than 60 decibels when the equipment is working, and the noise of the Raymond mill is as high as 80 decibels. Compared with the Raymond mill, the crushed material of this kind of equipment reduces the oil content in the material, and the total amount is reduced by 90%.

Description of drawings

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

Fig. 1 is a schematic diagram of the technological process layout of the present utility model.

In the figure 1. Feeder, 2. Stirring shaft, 3. Classifier host I, 4. Classifier host II, 5. Rotary collector, 6. Bag filter, 7. Induced fan, 8. Air inlet, 9 .Ball mill crushing cavity, 10.Transmission mechanism

Detailed ways

The lower end of the feeder (1) is connected with the ball mill crushing chamber (9). The inner center of the ball mill crushing chamber (9) is the stirring shaft (2). The stirring shaft (2) is connected with the transmission mechanism (10). The ball mill crushing chamber (9) The upper end is connected with the classifier host I (3), and the classifier host I (3), the classifier host II (4), the rotary collector (5), the bag filter (6), and the induced draft fan (7) pass through in sequence The air ducts are connected, and an embodiment is described below:

1. Take the silicon carbide sand after sieving, the particles of which are less than 5mm, and add it into the feeder continuously and evenly at a speed of 70kg per hour.

2. The amount of steel balls in the crushing chamber is about 400-500kg, the ratio of balls to materials is about 5:1, and the mill speed is 180RPM.

3. At the same time, set the speed of classifier host I above the grinding chamber to 820-850RPM, the speed of classifier host II to 1900-2200RPM, and set the air volume of induced draft fan to 3500m ³ /R.

4. At this time, the discharge particle size after crushing and classification, the first-grade discharge port is 15-4.8 μm (JIS#1200) accounts for 75%, and the output is 48.8kg/h. The discharge particle size of the cyclone outlet is 8-3.5 μm (by-product) accounting for 14.5% of the output, 9.4kg/h. The discharge particle size of the outlet of the bag filter is 3.5-0μm, accounting for 10%, the output is 6.5kg/h, the loss is 0.5%, and the output is 0.3kg/h. The obtained grade I outlet material is the single number daily standard JIS# 1200 products, others are paid products.

Comparative example, take the production of Japanese standard JIS#1200 as an example:

comparative index Dry ball mill classifier jet mill raymond mill Wet ball mill Particle shape Equal-area shape with sharp corners Equal-area shape without sharp corners Needle-like, flake-like equal-volume shape Equal-area shape with sharp corners Yield(%) 75 75 60 30 Noise (decibel) Less than 60 decibels Less than 60 decibels 80-100 decibels less than 40 decibels Output(kg/h) 48.8 0 40 15 oil content trace none more none production conditions Continuous production for 20 hours Continuous production for 20 hours Continuous production for 20 hours Produced in 3 batches, each batch lasts 8 hours

Claims (1)

1. ball grinder graded equipment of dry type, constitute by transmission mechanism, feeder, shaft, ball mill crushing chamber, grader main frame I, grader main frame II, cyclone collector, sack cleaner, air-introduced machine, air inlet, it is characterized in that: the feeder lower end links to each other with the ball mill crushing chamber, the center is a shaft in the ball mill crushing chamber, shaft links to each other with transmission mechanism, ball mill crushing chamber upper end connects as one with grader main frame I, grader main frame I, grader main frame II, revolves gatherer, sack cleaner, air-introduced machine and links to each other by airduct successively.

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