CN104941769A - Solid material grinding method and solid material grinding machine - Google Patents

Abstract

The invention relates to a solid material grinding method and a grinding machine. The solid material enters the grinding body of the grinding chamber after a wind selection, and is thrown to the liner plate in the radial direction under the centrifugal action of the high-speed rotating grinding body to be impacted and crushed. After returning, it collides with the new material and breaks it. The large-grained material falls under the action of gravity and is hammered at high speed, and then enters the working chamber through the conduit. The working chamber has both the functions of feeding and air-mixing elutriation. The materials enter the classifier for classification, and the finished materials meeting the particle size requirements are collected by the spiral collector and bag filter, and then discharged from the finished product discharger, and the materials that do not meet the particle size requirements are returned to the grinding chamber for grinding again. The beneficial effects of the present invention are: fine grinding particle size, high grinding efficiency and fine powder collection effect, and can produce powders with a particle size ranging from 80 to 1500 mesh, especially in the production of ultrafine powder above 800 mesh or materials with relatively high hardness. The advantages of high output and stable quality; compact equipment structure and low maintenance cost.

Description

A kind of solid material grinding method and solid material grinding machine

technical field

The invention relates to the technical field of solid material crushing, in particular to a solid material grinding method and a solid material grinding machine for finished material whose particle size ranges from 80 to 1500 mesh.

Background technique

The superfine pulverization technology of pulverizer is a new pulverization engineering technology developed along with modern high technology and new material industry in recent years, and has become one of the most important deep processing technologies of industrial minerals and other raw materials. The development of high-tech industries is of great significance. After the material is ultra-fine, with the increase of its surface area, other performance changes can be caused, and the use effect and utilization rate of the material can be greatly improved. Ultrafine powder is infiltrating the entire industrial sector and high-tech fields, and is known as the origin of modern high-tech. Ultrafine pulverization technology has been widely used in many fields such as chemical industry, metallurgy, mining, building materials, daily chemicals, food, medicine, agriculture, environmental protection and aerospace.

During the grinding process of the mill, due to the violent friction between the grinding body in the mill and the outer surface of the solid particles, the collision and friction between the solid particles, and the violent collision and friction between the solid particles and the inner wall of the cylinder, the solid particles are brought There is a large amount of static electricity, which causes the surface of the grinding body and the liner to be adhered by the fine powder, forming a so-called "buffer layer", which reduces the impact probability and grinding effect of the grinding medium on the material, thereby reducing the working efficiency of the mill and resulting in a decrease in the output of the mill. And the product quality is reduced, and the particle gradation is unreasonable. Scholars from the former Soviet Union pointed out: "A 200um material layer is bonded to the ball and the liner, and the resulting buffering effect reduces the impact energy by 80%." It can be seen that the buffering effect of the material layer reduces the severity of the impact energy.

At present, the most commonly used mills in China are Raymond mills and vertical mills, but they have the following problems in the process of use: 1) The product fineness is low, and the fineness of ordinary Raymond mills is generally below 500 mesh ; 2) High mechanical failure rate, high power consumption, high noise, and large emission pollution; 3) Low system efficiency, unsatisfactory separation effect of the product collection system, a large amount of fine powder cannot be effectively collected and repeated circulation in the system Cause power waste; 4) The larger particles in the material entering the grinding area and the particles that will not be ground in the future are often thrown into the bellows box and gathered at the tail of the volute box, and continue to extend forward, so that the air volume is gradually reduced, which is easy to cause traffic jams. Powder output or less powder output will affect the output; 5) Overhaul and maintenance are inconvenient, the service life of wearing parts and wear-resistant parts is short, and the replacement cost is high.

Contents of the invention

The invention provides a solid material grinding method, which has the characteristics of fine grinding particle size, high grinding efficiency and good fine powder collection effect. At the same time, the solid material grinding machine provided has a wide application range and can produce powders with a particle size ranging from 80 to 1500 mesh. , especially in the production of ultra-fine powder above 800 mesh or materials with high hardness (such as fused magnesium), its production efficiency is 3 to 5 times that of ordinary mills, and the product quality is stable; the equipment is compact in structure, easy to repair and maintain, Consumable parts and wear-resistant parts have long service life and low replacement cost, which can significantly reduce production costs.

In order to achieve the above object, the present invention adopts the following technical solutions to realize:

A grinding method for solid materials. The grinding body rotates at high speed to generate an updraft. The upper working chamber of the grinding chamber has the functions of feeding and air-mixing elutriation, and the wall of the working chamber is provided with a ring-shaped air inlet to keep the positive pressure in the grinding body all the time. Air mixing and elutriation are also provided; pre-broken solid materials enter the grinder from the feed port of the working chamber, and enter the grinding body after the first winnowing; under the centrifugal action of the high-speed rotating grinding body, the The material ejection outlet on the body is thrown radially onto the lining plate of the side wall of the grinding chamber to be impacted and crushed, and after rebounding, it collides with the new material and crushes; After the hammering plate is hammered and ground at high speed, the material enters the working chamber through the duct upwards under the action of the airflow formed by the rotation of the grinding body, and enters the classifier after being eluted by air mixing, and the finished material that meets the particle size requirements passes through the spiral receiver and After being collected by the bag filter, the material is discharged from the finished product discharger, and the material that does not meet the particle size requirement is returned to the grinding chamber for crushing and grinding again.

When the grinding body is crushed, the maximum linear velocity of the material is 120m/s, and the particle size of the finished material is realized by adjusting the motor speed of the classifier.

A solid material grinder for realizing a solid material grinding method, including a grinding chamber, a working chamber and a classifier arranged sequentially from bottom to top, the middle of the grinding chamber is provided with a grinding body, and the side wall of the grinding chamber corresponding to the grinding body There is a liner on the top; the grinding body is a hollow structure, the upper material inlet is connected to the lower material opening of the working chamber, and there are multiple material throwing outlets and hammering plates in the circumferential direction; the grinding chamber and the working chamber are connected through multiple conduits, and the working chamber is equipped with Ring-shaped air inlet; the classifier is connected to the spiral collector and the bag filter in turn, and the outlets of the spiral receiver and the bag filter are respectively connected to the finished product outlet; the inlet of the working warehouse is also connected to the raw material warehouse through the material conveying device .

The grinding body is provided with a plurality of vertical or inclined hammering plates along the circumferential direction, and each hammering plate is provided with 1 to 10 wear-resistant blocks on one side of the rotation direction, and a high-wear-resistant alloy layer is provided on the surface of the wear-resistant blocks. The wear-resistant welding rod is used to weld the hammering plate and the grinding body body.

The hammering plates are arranged in groups, and each group is divided into an upper hammering plate and a lower hammering plate, and the upper hammering plates and the lower hammering plates are arranged alternately in the circumferential direction, and the parts of the upper hammering plates and the lower hammering plates Or the overall vertical or inclined setting, the inclination angle is 5°～30°.

The liner is a densely arranged concave arc-shaped tooth liner, and the surface is provided with a high wear-resistant alloy layer.

The high wear-resistant alloy layer is set by pasting, coating or surfacing, and the grade of the high wear-resistant alloy is YL8.

A plurality of arc-shaped deflectors are arranged in the grinding body along the circumferential direction, and the arc-shaped deflectors are located between the outlets for throwing out materials.

The finished product discharger is a two-way Jiaolong conveyor, the discharge port is set between the spiral receiver and the discharge port of the bag filter, and the spiral direction of the conveying blades on both sides of the finished product discharge port is opposite.

The classifier is a squirrel cage classifier.

Compared with prior art, the beneficial effect of the present invention is:

1) The grinding body has multiple functions, one is the blowing function, which transports the crushed materials to the working warehouse for air mixing and elutriation; the other is the material acceleration and radial throwing function, which can accelerate the materials to 110-120m /s and radially thrown directly hit the liner, which has a scouring effect on both the hammer plate and the liner, effectively breaking the "cushion cushion"; third, it has the hammering function, hammering the materials entering the grinding chamber; the grinding body The structure is the guarantee to achieve high-efficiency grinding, increase the mesh number of finished materials, and improve the grinding efficiency. Therefore, the grinding machine of the present invention has large output, high-quality finished products, and reasonable particle gradation;

2) The large-scale production of superfine powder up to 1500 mesh has been realized, and the products are widely used and have a good market prospect;

3) The open feeding port keeps positive pressure in the grinding chamber, prevents the waste of power caused by the circulation of fine powder above 800 mesh in the grinding chamber due to negative pressure, improves production efficiency, ensures the collection effect of fine powder, and can process the material Drying, air-cooling and cooling effect on the grinding chamber;

4) The working chamber has both the function of the feeding chamber and the air-mixing elutriator. It is connected with the grinding body through the duct, and the air is taken in through the annular air inlet, so that the materials falling from the classifier can be repeatedly elutriated, and the classification efficiency is high;

5) There are high wear-resistant alloy layers in the grinding chamber where the material collides with the material, which has good wear resistance and low iron content in the material; there are multiple wear-resistant blocks on the working surface of the hammering plate, which can be selectively replaced according to the degree of wear, and are mutually Good replaceability, which greatly reduces the cost of equipment maintenance and replacement of wearing parts;

6) The two-way Jiaolong conveyor is used as the finished product discharge equipment, which can be connected with the discharge port of the spiral receiver and the bag filter at the same time, and the conveying volume is even. Both sides of the discharge port of the two-way Jiaolong conveyor adopt two-way spiral blades to push the material , high discharge efficiency, good mixing;

7) The overall structure of the equipment is simple, the layout is compact, the volume is small, and it is easy to manufacture. The finished product has a large particle size range and is easy to adjust. Compared with other ultrafine powder mills, the production of products of the same level has high production efficiency and low cost. Advantage.

Description of drawings

Fig. 1 is a schematic structural view of a solid material grinder according to the present invention.

Figure 2-1 is the first cross-sectional view of A-A in Figure 1 .

Figure 2-1a is the M-direction view in Figure 2-1.

Figure 2-1b is the N-direction view 1 in Figure 2-1.

Figure 2-1c is the second N-direction view in Figure 2-1.

Figure 2-2 is the second cross-sectional view of A-A in Figure 1 .

Figure 2-2a is the M-direction view in Figure 2-2.

Figure 2-2b is the N-direction view in Figure 2-2.

Fig. 3 is a sectional view of the main body of the material grinding machine of the present invention.

Fig. 4 is a structural schematic diagram of the classifier of the present invention.

Fig. 5 is a schematic structural view of the two-way Jiaolong conveyor of the present invention.

In the figure: 1. Main frame 2. Main motor 3. Grinding chamber 31. Grinding body 310. Upper deflector 311. Lower deflector 32. Grinding chamber side wall 33. Liner 34. Grinding chamber connection flange 35. Hammering plate 35a. Upper hammering plate 35b. Lower hammering plate 36. Wear-resistant block 37. Curved deflector 4. Conduit 5. Working chamber 51. Material inlet 52. Annular air inlet 6. Classifier 61. Classifier motor 62. Belt transmission device 63. Classifier drive shaft 64. Support plate 65. Blade rotor 66. Classifier outlet 7. Material conveying device 8. Raw material bin 9. Raw material bin bracket 10. Spiral receiver 11 .Bag dust collector 12. Finished product discharge device 121. Two-way dragon conveyor motor 122. Two-way dragon conveyor drive shaft 123. Forward spiral blade 124. Reverse spiral blade 125. Spiral receiver discharge port 126. Cloth bag dust collector discharge port 127. Two-way Jiaolong conveyor discharge port 13. Axial flow induced draft fan

Detailed ways

The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

As shown in Fig. 1 and Fig. 3, a kind of solid material grinding method of the present invention, grinding body 31 rotates at a high speed to generate updraft, grinding chamber 3 upper working chamber 5 has concurrently feeding and air mixing elutriation function, and working chamber 5. There is an annular air inlet 52 on the warehouse wall to keep the positive pressure inside the grinding body 31 and provide wind for air mixing and elutriation; the pre-broken solid material enters the grinder from the feeding inlet 51 of the working chamber, and after the first After air selection, it enters the grinding body 31; under the centrifugal action of the high-speed rotating grinding body 31, the material is thrown from the material ejection port of the grinding body 31 to the lining plate 33 of the side wall 32 of the grinding chamber in the radial direction and is crushed. After bouncing back, it collides with the new material and breaks it; the large-grained material falls under the action of gravity and rebound force, and after being hammered and ground by the grinding body hammer plate 35 at high speed, the material moves upward under the action of the airflow formed by the rotation of the grinding body 31 It enters the working chamber 5 through the conduit 4, and enters the classifier 6 for classification after being elutriated by air mixing. The finished materials that meet the particle size requirements are collected by the spiral collector 10 and the bag filter 11, and then discharged by the finished product discharger 12. The material with the required particle size returns to the grinding chamber 3 for crushing and grinding again.

When the grinding body 31 is crushed, the maximum linear velocity of the material is 120 m/s, and the particle size of the finished material is realized by adjusting the motor speed of the classifier 6 .

See Fig. 1, which is a schematic structural view of a solid material grinder according to the present invention. The solid material grinding machine for realizing a solid material grinding method according to the present invention includes a grinding chamber 3, a working chamber 5 and a classifier 6 arranged sequentially from bottom to top, and the middle part of the grinding chamber 3 is provided with a grinding body 31, A lining plate 33 is provided on the side wall 32 of the grinding chamber corresponding to the grinding body 31; the grinding body 31 is a hollow structure, and the upper feeding port is connected with the feeding port of the working chamber 5, and a plurality of material throwing ports and hammering plates 35 are arranged in the circumferential direction; The grinding chamber 3 and the working chamber 5 are connected by multiple conduits 4, and the working chamber 5 is provided with an annular air inlet 52; the classifier 6 is sequentially connected with the spiral collector 10 and the bag filter 11, and the spiral collector 10 and the bag filter 11 The outlets of the outlets are respectively connected to the finished product outlets 12;

See FIG. 2 , which is a schematic structural diagram of the grinding body 31 of the present invention. The grinding body 31 is provided with a plurality of vertical or inclined hammering plates 35 along the circumferential direction, and each hammering plate 35 is located on one side of the rotation direction to be provided with 1 to 10 wear-resistant blocks 36, and the surface of the wear-resistant blocks 36 is provided with a high The wear-resistant alloy layer, the hammering plate 35 and the body of the grinding body 31 are welded with a wear-resistant welding rod.

The hammering plates 35 are arranged in groups, each group is divided into an upper hammering plate 35a and a lower hammering plate 35b, and the upper hammering plates 35a and the lower hammering plates 35b are arranged alternately in the circumferential direction, the upper hammering plates 35a, A part or the whole of the lower hammer plate 35b is inclined, and the inclination angle is 5°-30°.

The liner 33 is a densely arranged concave arc-shaped tooth liner, and the surface is provided with a high wear-resistant alloy layer.

The high wear-resistant alloy layer is set by pasting, coating or surfacing, and the grade of the high wear-resistant alloy is YL8.

A plurality of arc-shaped deflectors 37 are arranged in the grinding body 31 along the circumferential direction, and the arc-shaped deflectors 37 are located between the outlets for throwing out materials.

The finished product discharge device 12 is a two-way Jiaolong conveyor, and the discharge port 127 is located between the discharge ports 125, 126 of the spiral receiver 10 and the bag filter 11, and the finished product discharge device discharge port 127 The helical directions of the conveying blades 123 and 124 on both sides are opposite.

The classifier 6 is a squirrel cage classifier.

See Fig. 3, which is a cross-sectional view of the main part of the material grinder of the present invention. The main part of the material grinder is composed of a grinding chamber 3, a working chamber 5 and a classifier 6, and is equipped with necessary feeding and discharging devices for the production line. The main body is erected on the main frame 1, and the grinding chamber 3 is connected with the main frame 1 through a connecting flange 34 to form a closed space. When working, the main motor 2 installed under the main frame 1 drives the grinding body 31 to rotate through the shaft sleeve, and the pre-broken solid material is stored in the raw material bin 8, and the raw material bin bracket 9 is arranged under the raw material bin 8, and the material is transported by the material The device 7 enters the working chamber 5 through the feed port 51 . The material conveying device 7 can be conventional feeding equipment such as a bucket elevator, a belt conveyor or a vibrating feeder, and a belt conveyor is taken as an example in FIG. 1 . The feeding port of the working chamber 5 is docked with the material receiving port opened in the middle of the grinding body 31, so that the material directly enters the grinding body 31 after a winnowing and then rotates at a high speed, and passes through the annular air inlet 52 set on the working chamber 5 at the same time. Air can be sucked in to ensure that the internal pressure of the grinding body 3 is always in a positive pressure state, and at the same time, it has the effect of air cooling the machine body. A slag outlet is provided at the bottom of the grinding chamber to regularly remove the remaining slag after grinding.

Grinding body 3 body is made up of upper deflector plate 310 and lower deflector plate 311, and one end of hammering plate 35 is welded with grinding body 3 body with wear-resistant welding rod, and the other end protrudes out of the body, and it also plays a role of hammering. It can play a guiding role for the centrifugally thrown material, so that there is a positive impact between it and the lining plate 33, and the impact force is increased. At the same time, the friction force in the process of material throwing can also play a role in scouring the hammering plate 35, so It can prevent the generation of "buffer layer" and greatly improve the grinding efficiency.

The structure of the grinding chamber 3 directly determines the grinding efficiency and grinding quality. In the present invention, the hammer plate 35 can adopt various structural forms. As shown in Figure 2-1, three sets of hammering plates 35 are provided on the grinding body 3, and each set of hammering plates 35 is provided with an upper hammering plate 35a and a lower hammering plate 35b. The upper hammering plate 35a and the lower hammering plate 35b can be set in various forms, as shown in Figure 2-1b, the lower hammering plate 35b is vertically set, the main body of the upper hammering plate 35a is vertically set, but its upper part is set obliquely . As shown in Fig. 2-1c, both the upper hammering plate 35a and the lower hammering plate 35b are inclined, and the inclination directions are opposite. Fig. 2-1a is the front view of these two hammering plates 35, and each hammering plate 35 is provided with a plurality of wear-resistant blocks 36. As shown in Figure 2-2, three hammering plates 35 are provided on the grinding body 3, and each hammering plate 35 is set obliquely (as shown in Figure 2-2b), and there are multiple wear-resistant plates on it. Block 36 (shown in Figure 2-2a).

The lining plate 33 can also adopt various forms. As shown in Figure 2-1, the lining plate 33 adopts a densely arranged concave arc-shaped tooth lining plate, which has a large contact surface with the material and a long contact time, which can further improve the grinding efficiency. As shown in Figure 2-2, the liner 33 is a relatively common toothed liner, and its processing is relatively simple.

The body of the grinding body 3 is also equipped with an arc-shaped deflector 37, so that the grinding body 3 rotates to generate a spiral air flow, and the fine particles are transported upwards and enter the working chamber 5 through the conduit 4. The materials are in the working chamber 5. Under the action of air flow, it is fully mixed with air for elutriation.

See Fig. 4, which is a structural schematic diagram of the classifier of the present invention. The classifier 6 is powered by the motor 61, and the transmission shaft 63 is driven to rotate at a high speed through the belt transmission device 62. The classifier 6 adopts the principle of a squirrel-cage classifier, and the blade rotor 65 is fixed by the support plate 64 in the circumferential direction of the transmission shaft 63, and rotates The material is classified through the airflow channel formed by the gap between the vane rotors 65. The materials that pass through the classifier 6 are qualified finished products, and the materials that fail to pass fall into the working chamber 5 and return to the grinding chamber 3 for further grinding.

See Fig. 5, which is a structural schematic diagram of the two-way Jiaolong conveyor of the present invention. The finished product discharger 12 of the present invention can adopt two-way Jiaolong conveyor 12, and the discharge port 127 is located between the discharge ports 125, 126 of the spiral receiver and the bag filter, and the finished product discharge device discharge port 127 The helical directions of the conveying blades on both sides are opposite. The two-way two-piece structure of the two-way Jiaolong conveyor 12 can promote the full mixing of the finished products in the spiral receiver 10 and the bag filter 11 to achieve a reasonable particle gradation.

The qualified finished materials enter the spiral collector 10 through the outlet 66 of the classifier and the conveying pipe for collection, and the collection rate can reach about 70%. In addition, the fine particles mixed with the air enter the bag filter 11 from the upper part of the spiral collector 10 for further cleaning. Collection, the finished materials collected by the spiral receiver 10 and the bag filter 11 are all output through the two-way Jiaolong conveyor 12 in a unified manner. In the present invention, since the spiral receiver 10 and the bag filter 11 are arranged on both sides of the two-way Jiaolong conveyor 12, the discharge port 127 of the two-way Jiaolong conveyor is arranged at the outlet 125 of the spiral receiver and the bag dust collector. Between the discharge port 126 of the device, the helical blades of the two-way Jiaolong conveyor adopt two kinds of rotating blades, the forward helical blade 123 and the reverse helical blade 124, so that when the motor 121 drives the transmission shaft 122 to rotate, the material is collected by the helical The material flowing out of the discharge port of the bag filter and the bag filter is concentrated and mixed to the discharge port 127 of the two-way Jiaolong conveyor at the same time, thereby improving the discharge efficiency.

The following examples are carried out on the premise of the technical solutions of the present invention, and detailed implementation methods and specific operation processes are provided, but the protection scope of the present invention is not limited to the following examples. The methods used in the following examples are conventional methods unless otherwise specified.

【Example 1】

The ground material is talc slag, and the specific process parameters are shown in Table 1;

Table 1

Analyzer speed 280 rpm 550 rpm 835 rpm 1110 rpm Finished product size 800 mesh 1000 mesh 1250 mesh 1500 mesh Yield 2 tons/hour 1.5 tons/hour 0.9 tons/hour 0.5 tons/hour

[Example 2]

The grinding material is fused magnesium, and the specific process parameters are shown in Table 2;

Table 2

Analyzer speed 280 rpm Finished product size 200 mesh Yield 1.5 tons/hour

[Example 3]

The ground material is sintered magnesia, and the specific process parameters are shown in Table 3;

table 3

Analyzer speed 280 rpm Finished product size 200 mesh Yield 1.5 tons/hour

In the above three embodiments, the pass rates of all finished products all reach more than 95%.

Claims (10)

1. a solid material Ginding process, is characterized in that, abrasive body High Rotation Speed produces ascending air, grinding chamber top working bin has charging concurrently and wind mixes elutriation function, and working bin bulkhead offers circular air inlet mouth, make to remain malleation in abrasive body, and provide wind to mix elutriation wind; Solid material after pre-broken enters grinder from working bin charging aperture, enters in abrasive body after first time selection by winnowing; Under the centrifugal action of the abrasive body of High Rotation Speed, material throws away from the material abrasive body that opening's edge is radial is clashed into broken by the liner plate being thrown grinding chamber sidewall, after rebounding with newly enter material and to liquidate percussion fragmentation; Large granular materials falls by gravity, bounce effect, after abrasive body hammering plate high-energy-rate hammering, grinding, material upwards enters working bin by conduit rotate the airflow function formed at abrasive body under, classifier is entered after mixing elutriation by wind, the finished product materials reaching granularity requirements is by the discharging of finished product discharger after spiral collector and sack cleaner are collected, and the material not reaching granularity requirements returns grinding chamber and again carries out crushing grinding.

2. a kind of solid material Ginding process according to claim 1, is characterized in that, when abrasive body is broken, the maximum line velocity of material is 120m/s, and the granularity of finished product materials is realized by the motor speed of adjustment clasfficiator.

3. for realizing the solid material grinder of a kind of solid material Ginding process according to claim 1, it is characterized in that, comprise the grinding chamber, working bin and the clasfficiator that set gradually from the bottom to top, in the middle part of described grinding chamber, be provided with abrasive body, the grinding chamber sidewall corresponding with abrasive body establishes liner plate; Abrasive body is hollow structure, and top material receiving port is connected with working bin feed opening, is circumferentially with multiple material and throws away mouth and hammering plate; Grinding chamber and working bin are by multiple tubes connection, and working bin is provided with circular air inlet mouth; Clasfficiator connects spiral collector and sack cleaner successively, and spiral collector is connected finished product discharger respectively with the discharging opening of sack cleaner; The charging aperture of working bin connects raw material cabin additionally by device for transporting objects.

4. a kind of solid material grinder according to claim 3, it is characterized in that, described abrasive body is along the circumferential direction provided with multiple vertical or hammering plate of tilting, each hammering plate is positioned at direction of rotation side and establishes 1 ~ 10 piece of wear-resistant block, wear-resistant block surface is provided with high-wear-resistant alloy layer, adopts wear resistance electrode to weld between hammering plate with abrasive body body.

5. a kind of solid material grinder according to claim 3 or 4, it is characterized in that, described hammering plate is arranged in groups, every component is upper hammering plate and lower hammering plate, and upper hammering plate and lower hammering plate are crisscross arranged at circumferencial direction, a part or whole part of upper hammering plate, lower hammering plate is vertical or be obliquely installed, and angle of inclination is 5 ° ~ 30 °.

6. a kind of solid material grinder according to claim 3, is characterized in that, described liner plate is the indent arc-shaped gear liner plate of dense arrangement, and surface is provided with high-wear-resistant alloy layer.

7. a kind of solid material grinder according to claim 4 or 6, is characterized in that, described high-wear-resistant alloy layer is arranged by stickup, coating or built-up welding mode, and the trade mark of high-wear-resistant alloy is YL8.

8. a kind of solid material grinder according to claim 3, is characterized in that, along the circumferential direction establish multiple arc deflector in described abrasive body, arc deflector throws away between mouth at each material.

9. a kind of solid material grinder according to claim 3, it is characterized in that, described finished product discharger is two-way flood dragon conveyer, and discharging opening is located between spiral collector and the discharging opening of sack cleaner, and the hand of spiral of finished product discharger discharging opening both sides conveying blade is contrary.

10. a kind of solid material grinder according to claim 3, is characterized in that, described clasfficiator is squirrel-cage clasfficiator.