CN210434634U - Oval ceramic grinding body - Google Patents

Abstract

The utility model discloses an oval ceramic grinding body, it is including grinding body (1), it makes with ceramic material to grind the body, it is oval cylindricality to grind the body, its the ratio of the oval minor axis of grinding body (4) and the oval major axis of grinding body (3) is 0.6 ~ 0.9, it is 0.9 ~ 1.3 with the ratio of the oval major axis of grinding body height (2). The utility model discloses compare with traditional metal grinder and have the characteristics and be: the specific gravity is small, the relative load of ball-milling equipment is small, the power consumption of the equipment can be reduced, the equipment abrasion and equipment faults are reduced, the equipment operation rate and the ball-milling production efficiency are improved, the electrostatic adsorption can be greatly reduced, the grinding efficiency and the grinding effect are improved, the iron content and the chromium content in a grinding body are reduced, the powder quality is ensured, the grinding temperature and the noise are reduced, the grinding loss is reduced, and the working environment is improved.

Description

Oval ceramic grinding body

Technical Field

The utility model relates to an abrasive body especially relates to a ball-milling abrasive body for fineness powder material.

Background

When a ball mill is used for preparing powdery materials, grinding bodies capable of extruding, crushing and grinding raw materials into powder are arranged in the ball mill, and the grinding bodies are subjected to countless collisions and impacts in the rotating process of the ball mill, and the iron content of the powder is required to be low, so that the grinding bodies have high strength, high wear resistance and toughness, the grinding effect is improved, the service life is prolonged, and the ball milling cost is reduced. At present, in ball mills, especially in the cement and chemical industry, steel balls and high-manganese iron balls are used as grinding bodies, and along with the development of scientific technology, high-chromium iron balls or high-chromium ellipsoid bodies are mostly used as grinding bodies at present. Although the high-chromium iron sphere or the high-chromium ellipsoid as the grinding body has the characteristics of good specific grinding effect, long service life and low ball-milling cost, the high-chromium iron sphere has the following problems in use as the grinding body, firstly, compared with the weight of the ground body with the same volume, the high-chromium iron sphere has larger weight, large load of a ball mill, large electric energy consumption, poor ball-milling effect, high manufacturing cost and installation cost of ball-milling equipment, high use failure rate of the ball-milling equipment and short service life; and secondly, when the high-chromium ellipsoid is used as the grinding body, compared with the high-chromium ellipsoid, the high-chromium ellipsoid has the advantages of a high-chromium sphere, and because the high-chromium ellipsoid has low gravity center, good stability, high lifting, high impact force, increased contact surface with the ground body, large shearing action force, good pliers manufacturing use and improved grinding effect, in practical use, the grinding effect of some high-chromium ellipsoid grinding bodies is not good, which is mainly characterized in that the structural design of the ellipsoid is not reasonable.

SUMMERY OF THE UTILITY MODEL

The problem that the above-mentioned prior art of pertinence crowning chromium spheroid or high chromium ellipsoid of adoption exist as the rinding body, the utility model provides an adopt ceramic material to make by excelling in, the ellipsoid that has specific shape is as the rinding body, not only can improve ball-milling equipment's life, reduces ball-milling equipment's manufacturing and installation cost, saves the electric energy, and the pollution abatement can improve the oval ceramic rinding body of ball-milling effect greatly moreover.

The to-be-solved technical problem of the utility model is that: an elliptical ceramic grinding body comprises a grinding body made of ceramic materials, the grinding body is in an elliptical cylinder shape, the ratio of the elliptical minor axis of the grinding body to the elliptical major axis of the grinding body is 0.6-0.9, and the ratio of the height of the grinding body to the elliptical major axis of the grinding body is 0.9-1.3.

The two ends of the grinding body are planes or arc spherical surfaces, and the ratio of the height of the highest point of the arc spherical surface to the minor axis of the grinding body is 0.4-0.5.

The ceramic material is made of a high-strength, high-wear-resistance and high-toughness ceramic material, and the ceramic material is preferably silicon nitride ceramic, high-aluminum ceramic or high-aluminum ceramic (the content of aluminum oxide is more than 75%). The density of the ceramic material with high strength, high wear resistance and high toughness is 3.3-3.6 g/cm³The compression strength is not less than 500MPa, and the Rockwell hardness HRA of the surface is not less than 45.

Compared with a spherical grinding body with the same mass, the elliptical ceramic grinding body has the advantages that the elliptical grinding body is low in gravity center, good in slope stability, higher in material lifting capacity, higher in crushing capacity and enhanced in shearing acting force; secondly, the grinding body has different curvature radiuses, can form different contact angles with materials, has more chances of contacting with the materials at the same time, and has a contact area of the elliptical grinding body and the materials which is 30 percent higher than that of the spherical grinding body; thirdly, the material has selective grinding and good screening effects, the particle composition and the particle shape of the material are improved, and the specific surface area of the grinding body can be increased by 20m²Per Kg; and the micro-material adsorption at the two ends of the elliptical ceramic grinding body can be reduced, so that the grinding efficiency is improved.

According to the grinding principle of oval rinding body, the utility model discloses carry out new optimization integrated design to oval ball major axis, minor axis and the structure that highly reasonable outfit formed to further improve oval rinding body's grinding effect and grinding efficiency.

The utility model discloses compare with traditional metal grinder and have following characteristics:

1. the specific gravity is small, the ball milling equipment has small relative load, not only can reduce the power consumption of the equipment, but also can reduce the abrasion and the failure of the equipment, improve the running rate of the equipment and the ball milling production efficiency,

2. in ball milling, the electrostatic adsorption can be greatly reduced, and the grinding efficiency and the grinding effect can be improved;

3. the iron content and the chromium content in the grinding body can be greatly reduced, and the powder quality can be ensured;

4. the grinding temperature and noise can be reduced, the wear resistance can be improved, the grinding loss is reduced, and the working environment is improved;

5. the grinding particle size distribution can be improved, and the grinding quality is improved.

Drawings

Figure 1 is a schematic structural view of the utility model,

figure 2 is a schematic view of state i during grinding,

figure 3 is a schematic illustration of state ii during grinding,

figure 4 is a schematic illustration of state iii during polishing,

fig. 5 is another schematic structural diagram of the present invention.

In the figure, 1, a polishing body 2, a polishing body height 3, a polishing body ellipse major axis 4, a polishing body ellipse minor axis 5, a first clamping angle 6, a second clamping angle 7, a third clamping angle 8, and an arc body.

Detailed Description

In fig. 1, an elliptical ceramic grinding body comprises a grinding body 1 made of a ceramic material containing silicon nitride, silicon carbide and high aluminum, and the density of the grinding body is 3.3-3.6 g/cm³The compressive strength is more than 500MPa, and the Rockwell hardness HRA of the surface is more than or equal to 45. The grinding body is in an elliptic cylinder shape, and the ratio of the elliptic minor axis 4 of the grinding body to the elliptic major axis 3 of the grinding body is determined to be 0.6-0.9 and the ratio of the height 2 of the grinding body to the elliptic major axis 3 of the grinding body is determined to be 0.9-1.3 through an elliptic ball grinding principle, test and accurate calculation. The two ends of the grinding body are planes or arc spherical surfaces, the ratio of the height of the highest point of the arc spherical surface to the minor axis of the grinding body is 0.4-0.5, and the two end surfaces of the grinding body are planes.

In fig. 5, an elliptical ceramic abrasive body is different from the abrasive body shown in fig. 1 in that: one end or two ends of the grinding body are arc bodies 8, and the height of the arc bodies is less than half of the length of the minor axis of the ellipse.

Fig. 2, 3 and 4 are three different state diagrams in the polishing process, wherein in the first state, the short axes of the two polishing bodies are vertically and collinearly overlapped, the holding angle between the two polishing bodies is a first holding angle 5 (theta 1), in the second state, the lower polishing body and the upper polishing body deviate towards the short axis direction of the polishing bodies, and the holding angle between the two short axes is a second holding angle 6 (theta 2); in the third state, the lower polishing body and the upper polishing body are largely deviated in the minor axis direction of the polishing body, the holding angle between the polishing bodies between the two minor axes is a third holding angle 7 (θ 3), and θ 1 < θ 2 < θ 3.

Claims (2)

1. An oval ceramic grinding body, it includes grinding body (1), characterized by: the grinding body is made of a ceramic material, the grinding body is in an elliptic cylinder shape, the ratio of the elliptic minor axis (4) of the grinding body to the elliptic major axis (3) of the grinding body is 0.6-0.9, and the ratio of the height (2) of the grinding body to the elliptic major axis of the grinding body is 0.9-1.3.

2. The elliptical ceramic abrasive body of claim 1, wherein: one end or two ends of the grinding body (1) are arc bodies (8).

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