Ball mill for cement production

Abstract

The utility model relates to a ball mill for cement production, which comprises an inner cylinder, a sliding chute is arranged on the inner cylinder, a grid plate is connected with the sliding chute in a sliding manner, a plurality of springs are fixedly connected onto the grid plate, the other end of each spring is fixedly connected to the bottom of the sliding chute, a feed port is arranged at one end of the inner cylinder, and the feed port is rotatably connected with a support. The other end of the inner cylinder is fixedly connected with a rotating shaft which is rotationally connected with the support. According to the ball mill for cement production, the separation grid plate is arranged on the cylinder wall of the ball mill, ground particles can be rapidly separated out of the ball mill, the discharging speed of the ball mill is increased, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to building material processing technology, in particular to a ball mill for cement production. Background Art

[0002] Ball mill is the key equipment for crushing materials after they are broken. This type of grinding mill is a mill that is loaded with a certain number of steel balls as grinding media. It is widely used in cement, silicate products, new building materials, refractory materials, fertilizers, black and non-ferrous metal beneficiation, glass and ceramics and other production industries to grind various ores and other grindable materials in dry or wet manner. Ball mill is suitable for grinding various ores and other materials, and is widely used in mineral processing, building materials and chemical industries.

[0003] In cement production, a series of raw material crushing and aging are performed to finally form cement clinker. Cement clinker is mostly dehydrated and bonded during the firing process. Before cement is made, the cement clinker must be ground into the fineness of the finished product. However, the clinker grinding process in cement production is faster than the raw material grinding process, and the traditional ball mill has a slow discharge rate, which affects production efficiency. Utility Model Content

[0004] The utility model aims to provide a ball mill for cement production, which is used to solve the problem that the ball mill for cement production has slow material discharge and affects production efficiency.

[0005] In order to solve the above problems, the utility model provides a ball mill for cement production, including an inner cylinder, a slide groove is arranged on the inner cylinder, a grate plate is slidably connected to the slide groove, a plurality of springs are fixedly connected to the grate plate, the other ends of the plurality of springs are fixedly connected to the bottom of the slide groove, a feed port is arranged at one end of the inner cylinder, the feed port is rotatably connected to a bracket, the other end of the inner cylinder is fixedly connected to a rotating shaft, and the rotating shaft is rotatably connected to the bracket.

[0006] The utility model provides a ball mill for cement production which also has the following technical features:

[0007] Furthermore, three grate plates are provided and arranged in a circular array on the inner cylinder. The grate plates are provided along the entire length of the inner cylinder, and a lining plate is installed on the inner wall of the inner cylinder between the three grate plates.

[0008] Furthermore, the width of the grate plate is 1 / 24 of the circumference of the inner cylinder.

[0009] Furthermore, an outer cylinder is arranged outside the inner cylinder, and a collecting bin is formed between the outer cylinder and the inner cylinder. A feeding cylinder with an upper opening is fixedly connected to the bottom of the outer cylinder, and a screw conveying shaft is rotatably connected inside the feeding cylinder. One end of the screw conveying shaft is rotatably connected to the bracket, and one end of the discharge port of the feeding cylinder is fixedly connected to the bracket.

[0010] Furthermore, a belt is connected between the rotating shaft and the spiral conveying shaft, a motor is fixedly connected to the bracket, and a driving shaft of the motor is fixedly connected to the rotating shaft.

[0011] Furthermore, an ion fan is installed at one end of the outer tube, and an air outlet is installed at the other end, and a dust collecting bag is installed on the air outlet.

[0012] The utility model has the following beneficial effects: the ball mill for cement production described in the present application adopts a separation grate plate arranged on the cylinder wall of the ball mill, which can quickly separate the ground particles out of the ball mill, speed up the discharge speed of the ball mill, and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is an axonometric schematic diagram of a ball mill for cement production according to an embodiment of the utility model;

[0014] Figure 2 It is a partial cross-sectional schematic diagram of a front view of a ball mill for cement production according to an embodiment of the utility model;

[0015] Figure 3 It is a right side cross-sectional schematic diagram of a ball mill for cement production according to an embodiment of the utility model;

[0016] Figure 4 The ball mill for cement production of the utility model embodiment Figure 3 Enlarged view of node A in the middle.

[0017] (1-inner cylinder, 2-chute, 3-grate plate, 4-spring, 5-feeding port, 6-bracket, 7-rotating shaft, 8-lining plate, 9-outer cylinder, 10-collecting bin, 11-feeding cylinder, 12-screw conveying shaft, 13-belt, 14-motor, 15-ion fan, 16-air outlet) DETAILED DESCRIPTION

[0018] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0019] like Figures 1 to 4 In the embodiment of the ball mill for cement production of the utility model shown, the ball mill for cement production includes an inner cylinder 1, a slide groove 2 is arranged on the inner cylinder 1, a grate plate 3 is slidably connected to the slide groove 2, a plurality of springs 4 are fixedly connected to the grate plate 3, the other ends of the plurality of springs 4 are fixedly connected to the bottom of the slide groove 2, a feed port 5 is arranged at one end of the inner cylinder 1, the feed port 5 is rotatably connected to a bracket 6, a rotating shaft 7 is fixedly connected to the other end of the inner cylinder 1, and the rotating shaft 7 is rotatably connected to the bracket 6.

[0020] Specifically, cement clinker to be refined is thrown into the inner cylinder 1 from the feed port 5, and the inner cylinder 1 is rotated to make the grinding balls and cement clinker rub and collide, and the ground cement powder particles leak out of the inner cylinder 1 at the grate plate 3. The grinding balls continuously fall down and hit the grate plate 3 as the inner cylinder 1 rotates. The grate plate 3 squeezes the spring 4 for buffering when the grinding balls hit. The vibration under the action of the spring 4 can prevent the cement powder particles from clogging the grate plate 3, thereby accelerating the separation efficiency. Compared with the traditional ball mill discharging method, the device has a faster discharging method and improves the production efficiency.

[0021] In one embodiment of the present application, preferably, three grate plates 3 are provided and arranged in a circular array on the inner cylinder 1, the grate plates 3 are provided along the entire length of the inner cylinder 1, and lining plates 8 are installed on the inner wall of the inner cylinder 1 between the three grate plates 3. Too many grate plates 3 will result in less friction for the grinding balls and they will not be able to form potential energy with the rotation of the inner cylinder 1, while too few grate plates 3 will not increase the separation efficiency. The lining plates 8 drive the grinding balls to rise and then fall to increase the efficiency of impact and friction crushing.

[0022] In one embodiment of the present application, preferably, the width of the grate plate 3 is 1 / 24 of the circumference of the inner cylinder 1, which is beneficial for the grinding balls to be carried to a high place by the liner 8 and fall on the liner 8 when falling. Reducing the impact frequency of the grate plate 3 is beneficial to extending the service life of the grate plate 3 and is also beneficial to the vibration of the grate plate 3.

[0023] In one embodiment of the present application, preferably, an outer cylinder 9 is arranged outside the inner cylinder 1, and a collecting bin 10 is formed between the outer cylinder 9 and the inner cylinder 1. A feeding cylinder 11 with an upper opening is fixedly connected to the bottom of the outer cylinder 9, and a screw conveying shaft 12 is rotatably connected inside the feeding cylinder 11. One end of the screw conveying shaft 12 is rotatably connected to the bracket 6, and one end of the discharge port of the feeding cylinder 11 is fixedly connected to the bracket 6. The cement powder leaked from the grate plate 3 gathers toward the bottom in the collecting bin 10 and enters the feeding cylinder 11. The powder in the collecting bin 10 is output from the device through the screw conveying shaft 12 in the feeding cylinder 11.

[0024] In one embodiment of the present application, preferably, a belt 13 is connected between the rotating shaft 7 and the spiral conveying shaft 12, a motor 14 is fixedly connected to the bracket 6, a drive shaft of the motor 14 is fixedly connected to the rotating shaft 7, the motor 14 provides power for the rotation of the inner cylinder 1, and the rotating shaft 7 provides rotational power for the spiral conveying shaft 12 through the belt 13.

[0025] In one embodiment of the present application, preferably, an ion fan 15 is installed at one end of the outer cylinder 9, and an air outlet 16 is installed at the other end. A dust bag (not shown in the figure) is installed on the air outlet 16. Cement particles are prone to generate static electricity during the rotation and friction process and are adsorbed on the grate plate 3, grinding balls and cylinder walls. The ion fan 15 outputs positive and negative ions to neutralize the positive and negative charges on the cement particles and the equipment to make the dust fall, which is beneficial to dust collection at the bottom of the outer cylinder 9. The dust bag on the air outlet 16 prevents the particles from diffusing into the atmosphere when the outer cylinder 9 discharges air.

[0026] In summary, the ball mill for cement production in the above-mentioned embodiment of the utility model, specifically, throws the cement clinker to be refined into the inner cylinder 1 from the feed port 5, rotates the inner cylinder 1 to make the grinding balls and the cement clinker rub and collide, and the ground cement powder particles leak out of the inner cylinder 1 at the grate plate 3, and the grinding balls continuously fall down and hit the grate plate 3 as the inner cylinder 1 rotates. The grate plate 3 squeezes the spring 4 for buffering when the grinding balls hit, and the vibration under the action of the spring 4 can prevent the cement powder particles from clogging the grate plate 3, and the cement powder particles fall into the collecting bin 10 between the outer cylinder 9 and the inner cylinder 1, and are accelerated to sink into the feeding cylinder 11 at the bottom of the outer cylinder 9 under the action of the ion fan 15, and the screw conveying shaft 12 is started to output the cement powder. The device arranges a separation grate plate on the wall of the ball mill, which can quickly separate the ground particles from the ball mill, thereby accelerating the discharge speed of the ball mill and improving the production efficiency.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A ball mill for cement production, characterized in that: It includes an inner cylinder, a slide groove is arranged on the inner cylinder, a grate plate is slidably connected to the slide groove, a plurality of springs are fixedly connected to the grate plate, the other ends of the plurality of springs are fixedly connected to the bottom of the slide groove, a feed port is arranged at one end of the inner cylinder, a bracket is rotatably connected to the feed port, a rotating shaft is fixedly connected to the bracket at the other end of the inner cylinder, and the rotating shaft is rotatably connected to the bracket.

2. The ball mill for cement production according to claim 1, characterized in that: The grate plates are provided in three pieces and are arranged in a circular array on the inner cylinder. The grate plates are arranged along the entire length of the inner cylinder, and a lining plate is installed on the inner wall of the inner cylinder between the three grate plates.

3. The ball mill for cement production according to claim 2, characterized in that: The width of the grate plate is 1 / 24 of the circumference of the inner cylinder.

4. The ball mill for cement production according to claim 1, characterized in that: An outer cylinder is arranged outside the inner cylinder, and a material collecting bin is formed between the outer cylinder and the inner cylinder. A feeding cylinder with an upper opening is fixedly connected to the bottom of the outer cylinder, and a screw conveying shaft is rotatably connected inside the feeding cylinder. One end of the screw conveying shaft is rotatably connected to the bracket, and one end of the discharge port of the feeding cylinder is fixedly connected to the bracket.

5. The ball mill for cement production according to claim 4, characterized in that: A belt is connected between the rotating shaft and the spiral conveying shaft, a motor is fixedly connected to the bracket, and a driving shaft of the motor is fixedly connected to the rotating shaft.

6. The ball mill for cement production according to claim 4, characterized in that: An ion blower is installed at one end of the outer cylinder, and an air outlet is installed at the other end, and a dust collecting bag is installed on the air outlet.

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