Ball hitting anti-crusting device of zinc smelting leaching residue drying kiln

Abstract

A ball hitting anti-crusting device of a zinc smelting leaching residue drying kiln comprises a plurality of angular buffer sets evenly arranged on the outer circumference of a drying kiln cylinder, each angular buffer set is composed of twelve angular buffers on the same circumference, and steel balls are arranged in each angular buffer. The angular buffer comprises a straight pipe impact section, a straight pipe ball holding section and an arc-shaped bent transition section formed between the straight pipe impact section and the straight pipe ball holding section, the straight pipe impact section is perpendicular to the surface of the drying kiln barrel, and the straight pipe ball holding section inclines in the direction opposite to the rotating direction of the drying kiln barrel through the arc-shaped bent transition section. The straight pipe ball holding section inclines by 60 degrees relative to the straight pipe impact section, a triangular reinforcing rib is welded between the bottom of the outer wall of the angular buffer and a bottom plate of the bottom face of the angular buffer, and an upper port of the angular buffer is connected with a top plate through a connecting flange and a bolt. Under the same additional torque of the drying kiln, larger impact energy and denser impact points are generated, and a better effect of preventing the kiln from crusting is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of wet zinc smelting equipment, and particularly relates to a ball-impact anti-crusting device for a zinc smelting leaching slag drying kiln. Background Art

[0002] Drying the slag is the first step in the pyrometallurgical treatment of hydrometallurgical zinc slag. High-temperature gases from a hot blast furnace flow countercurrently or concurrently through a 2.7×24m dia. drying kiln, drying the slag, which contains 25%-30% moisture, to below 15%. During the spiral discharge process within the kiln, the slag can adhere to the inner wall of the kiln, affecting drying efficiency. Severe crusting requires the kiln to be stopped for manual cleaning.

[0003] In the prior art, the leaching residue adhering to the inner wall of the drying kiln is removed by a ball-beating anti-crusting device. The anti-crusting device is usually composed of a plurality of straight tubes evenly distributed on the outer wall of the kiln tube. Steel balls are arranged in the straight tubes. When working, as the drying kiln rotates, the steel balls in the straight tubes fall freely under the action of their own gravity and hit the kiln tube, and the leaching residue adhering to the inner wall of the drying kiln is removed by the vibration of the tube wall.

[0004] However, in actual practice, it is found that some leached residue still adheres to the inner wall of the drying kiln. Therefore, how to further improve the anti-crusting effect of the ball-impact anti-crusting device in the drying kiln is a technical problem that needs to be solved urgently. Summary of the Invention

[0005] The purpose of the utility model is to overcome the deficiencies in the prior art and to provide a ball-impact anti-crusting device for a zinc smelting leaching slag drying kiln, so as to improve the anti-crusting effect.

[0006] The purpose of the utility model is achieved through the following technical solutions: a ball-impact anti-crusting device for a zinc leaching slag drying kiln, the ball-impact anti-crusting device for the zinc leaching slag drying kiln comprising a plurality of angular buffer groups evenly arranged on the outer circumference of the drying kiln cylinder, each angular buffer group consisting of 12 angular buffers on the same circumference, a steel ball being arranged in each of the angular buffers, the angular buffer comprising a straight tube impact section, a straight tube ball holding section and an arc-shaped transition section formed between the straight tube impact section and the straight tube ball holding section, the straight tube impact section being perpendicular to the surface of the drying kiln cylinder, the straight tube ball holding section being inclined in the opposite direction of the rotation direction of the drying kiln cylinder through the arc-shaped transition section, the straight tube ball holding section being inclined 60 degrees relative to the straight tube impact section, a bottom plate being welded to the bottom surface of the angular buffer, a triangular reinforcing rib being welded between the bottom of the outer wall of the angular buffer and the bottom plate, a connecting flange being arranged at the top opening of the angular buffer, and the connecting flange being connected to the top plate by bolts.

[0007] The inner diameter of the angular buffer is 80 mm, the diameter of the steel ball is 76 mm, and the weight of the steel ball is 6.5 kg.

[0008] The beneficial effects of the present invention are as follows: the present invention adopts a plurality of angular buffer groups on the outer surface of the drying kiln cylinder, each angular buffer group is composed of 12 angular buffers on the same circumference, and the angular buffer adopts a bent pipe structure that is bent 60 degrees in the opposite direction of the rotation direction of the drying kiln cylinder, so that under the same additional torque of the drying kiln, greater impact energy and more dense impact points are generated, thereby achieving a better anti-kiln crusting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural diagram of the present utility model.

[0010] In the figure: 1-drying kiln shell; 2-angular buffer; 3-straight tube impact section; 4-arc-shaped bend transition section; 5-straight tube ball holding section; 6-steel ball; 7-bottom plate; 8-top plate; 9-triangular reinforcement rib. DETAILED DESCRIPTION

[0011] The present invention will be described in detail below with reference to the accompanying drawings.

[0012] like Figure 1 As shown, a ball-impact anti-crusting device for a zinc leaching slag drying kiln comprises a plurality of angular buffer groups uniformly arranged on the outer circumference of a drying kiln cylinder 1, each angular buffer group being composed of 12 angular buffers 2 on the same circumference, a steel ball 6 being arranged in each angular buffer 2, the angular buffer 2 comprising a straight tube impact section 3, a straight tube ball-holding section 5 and an arc-shaped bend transition section 4 formed between the straight tube impact section 3 and the straight tube ball-holding section 5, the straight tube impact section 3 being perpendicular to the surface of the drying kiln cylinder 1, the straight tube ball-holding section 5 being inclined in the opposite direction of the rotation direction of the drying kiln cylinder 1 through the arc-shaped bend transition section 4, the straight tube ball-holding section 5 being inclined 60 degrees relative to the straight tube impact section 3, a bottom plate 7 being welded to the bottom surface of the angular buffer 2, a triangular reinforcing rib 9 being welded between the bottom of the outer wall of the angular buffer 2 and the bottom plate 7, a connecting flange being provided at the top opening of the angular buffer 2, and the connecting flange being connected to the top plate 8 by bolts.

[0013] During operation, the drying kiln rotates, and the steel ball 6 in the angular buffer 2 at the low point contacts the top plate 8. When the angular buffer 2 at the low point rotates with the drying kiln to the high point, the steel ball 6 automatically falls along the angular buffer 2 and strikes the drying kiln cylinder 1, achieving a shocking effect. The additional torque of the drying kiln rotation is proportional to the distance between the center of the steel ball 6 in the angular buffer 2 at the low point and the center of the drying kiln. Multiple angular buffer groups are used on the outer surface of the drying kiln cylinder 1. Each angular buffer group consists of 12 angular buffers 2 on the same circumference, and the angular buffer 2 adopts a curved pipe structure that is bent 60 degrees in the opposite direction of the rotation direction of the drying kiln cylinder 1. At the top of the straight pipe impact section 3, a counterclockwise inclined straight pipe ball holding section 5 is designed. When the drying kiln rotates clockwise, the straight pipe impact section 3 is at 11 o'clock. In the clockwise direction, the straight tube ball holding section 5 is in a horizontal state, and the steel ball 6 is relatively stationary in the straight tube ball holding section 5. When the drying kiln continues to rotate, the straight tube ball holding section 5 begins to tilt, and the steel ball 6 rolls away from the straight tube ball holding section 5 due to gravity. In the straight tube impact section 3, the steel ball 6 can achieve full free fall and then hit the drying kiln cylinder 1, outputting maximum impact energy to the kiln cylinder, so that under the same additional torque of the drying kiln, greater impact energy and more dense impact points are generated, achieving better anti-kiln crusting effect, reducing the number of kiln shutdowns due to kiln crusting, and reducing the number of people entering the kiln for cleaning.

[0014] Since the steel ball 6 hits the bottom plate 7, damage to the drying kiln shell 1 is avoided. The bottom plate 7 is welded to the bottom surface of the angular buffer 2. A triangular reinforcing rib 9 is welded between the bottom of the outer wall of the angular buffer 2 and the bottom plate 7, making the connection between the bottom surface of the angular buffer 2 and the bottom plate 7 more reliable, preventing the large impact energy of the steel ball 6 from damaging the utility model.

[0015] The upper end of the angular buffer 2 is connected to a top plate 8 via a connecting flange and bolts, which makes it easy to open the top plate 8 for equipment maintenance and repair.

[0016] The effective impact energy generated by the ball-impact anti-crusting device on the kiln tube is related to the weight of the steel ball 6. The inner diameter of the angular buffer 2 is 80 mm, the diameter of the steel ball 6 is 76 mm, and the weight of the steel ball 6 is 6.5 kg. This allows the steel ball 6 to move smoothly in the angular buffer 2 and obtain better impact force at the same height.

[0017] Finally, it should be noted that the above content is only used to illustrate the technical solution of the utility model, rather than to limit the scope of protection of the utility model. Simple modifications or equivalent replacements of the technical solution of the utility model by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the utility model.

Claims

1. A ball-impact anti-crusting device for a zinc smelting leaching slag drying kiln, characterized by: The ball impact anti-crusting device of the zinc leaching slag drying kiln includes a plurality of angular buffer groups evenly arranged on the outer circumference of the drying kiln cylinder, each angular buffer group is composed of 12 angular buffers on the same circumference, and a steel ball is arranged in each angular buffer. The angular buffer includes a straight tube impact section, a straight tube ball holding section and an arc-shaped transition section formed between the straight tube impact section and the straight tube ball holding section. The straight tube impact section is perpendicular to the surface of the drying kiln cylinder, and the straight tube ball holding section is inclined in the opposite direction of the rotation direction of the drying kiln cylinder through the arc-shaped transition section. The straight tube ball holding section is inclined 60 degrees relative to the straight tube impact section. A bottom plate is welded to the bottom surface of the angular buffer, and a triangular reinforcement rib is welded between the bottom of the outer wall of the angular buffer and the bottom plate. A connecting flange is provided at the top of the angular buffer, and the connecting flange is connected to the top plate by bolts.

2. The ball-impact anti-crusting device for the zinc smelting leaching slag drying kiln according to claim 1, characterized in that: The inner diameter of the angular buffer is 80 mm, the diameter of the steel ball is 76 mm, and the weight of the steel ball is 6.5 kg.

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