Grid type iron unloading device in material balance system

Abstract

The utility model discloses a grid type iron unloading device in a material balance system, which comprises an ore discharging system and a ball discharging system, the ore discharging system comprises a lifting cylinder, a guide cylinder and an ore discharging box body, the lifting cylinder and the guide cylinder are coaxially connected with a discharging bushing, a spiral rib with the same rotating direction as a mill is welded on the inner wall of the lifting cylinder, the left side of the ore discharging box body is matched with the guide cylinder, and the ball discharging system is arranged on the left side of the ore discharging box body. A conical opening is formed in the lower part of the ore discharge box body; the volleyball system comprises a magnetic arc, an iron receiving groove, a chute, a sprinkler pipe, a guide groove and a steel ball recovery box, the magnetic arc is fixed on the magnetic track, and the iron receiving groove is connected with a lower bent pipe through an upper horn-shaped groove; the chute is of a grid type structure, the upper end of the chute is coaxially connected with the iron receiving tank elbow flange, and the lower end of the chute is connected with the ore discharge box body and the guide chute; and a sprinkler pipe penetrating through the ore discharge box body is arranged above the chute. According to the utility model, the phenomenon of'ball milling 'in the mill is avoided, the slurry circulation efficiency of the mill is improved, and the separation of ore pulp and magnetic materials is facilitated.

Description

Technical Field

[0001] The utility model relates to an iron unloading device with a grid structure in a material balance system, belonging to the technical field of ore dressing equipment. Background Art

[0002] During the production process of a ball mill, steel balls of different sizes need to be added as grinding media. However, during the grinding process, due to long-term wear and corrosion, the steel balls will break. The broken small steel balls will cause the phenomenon of "iron passing" in crushers, hydrocyclones or circulating pumps, seriously damaging the service life of equipment such as hydrocyclones and pulp tanks in the subsequent classification and grinding circuit, seriously reducing the working efficiency of the mill, and further destroying the high efficiency of the crushing and grinding process. For this reason, most manufacturers install permanent magnet drums or hanging iron removers on the belt conveyor, but it is difficult to remove broken balls when the material layer is thick. For this reason, many manufacturers have developed arc-shaped iron removers (abbreviated as "magnetic arcs"), which have achieved good results in removing broken balls and iron impurities. However, due to the irregular shape of the broken balls, it is easy to cause the broken balls to roll over and fall back into the lifting cylinder during the lifting process, seriously affecting the iron removal efficiency and the normal use of the ball mill circulation system. And when the broken steel balls are recycled, they will carry some pulp particles, which will cause a waste of a large amount of mineral resources after long-term use. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide an iron unloading device with a grid structure in a material balance system to solve the problem that broken steel balls are easy to damage the circulating pump and hydrocyclone equipment in view of the defects existing in the prior art.

[0004] To solve this technical problem, the utility model provides a grid-type iron unloading device in a material balance system, which includes a discharge system and a volleyball system. The discharge system includes a lifting cylinder, a diversion cylinder and a discharge box body. The lifting cylinder and the diversion cylinder are coaxially connected to the discharge lining sleeve through a flange. Spiral ribs with the same rotation direction as the mill are welded on the inner wall of the lifting cylinder. The left side of the discharge box body is matched with the diversion cylinder to introduce pulp, and a conical opening is arranged at the lower part of the discharge box body to discharge the pulp into the slurry circulation box. The volleyball system includes a magnetic arc, an iron receiving groove, a chute, a water sprinkling pipe, a material guiding groove and a steel ball recovery box. The magnetic arc is fixed on the magnetic rail through anchor bolts. The iron receiving groove is connected by welding an upper trumpet-shaped groove and a lower elbow pipe. The chute is of a grid structure. The upper end of the chute is coaxially connected to the elbow flange of the iron receiving groove, and the lower end is connected to the discharge box body and the material guiding groove to recover broken steel balls. A water sprinkling pipe passing through the discharge box body is arranged above the grid-type chute, and the pulp particles carried by the broken steel balls in the chute are flushed into the discharge box body through the water sprinkling pipe.

[0005] The magnetic arc consists of magnetic poles and a magnetic rail. The magnetic arc can slide left and right through the magnetic rail and is installed and disassembled in cooperation with the lifting cylinder. A 50-60 mm thick wooden board is filled between the flange of the magnetic arc and the lifting cylinder to prevent the magnetic arc from being magnetically attracted to the flange of the lifting cylinder.

[0006] A lifting bar passing through the spiral ribs is welded inside the lifting cylinder to improve the efficiency of grabbing steel balls.

[0007] Flange stop mouths that cooperate with each other are provided inside the flanges where the lifting cylinder, the diversion cylinder, and the discharge bushing are coaxially connected. The tolerance grade of the flange stop mouth is IT11, which prevents the lifting cylinder from jolting up and down and rubbing against the surface of the magnetic system.

[0008] The spiral ribs inside the lifting cylinder are of a double - headed spiral structure with 1 - 1.5 turns and a pitch of 500 mm.

[0009] The iron - receiving groove is made of low - magnetic 316 stainless steel material and is composed of an upper trumpet - shaped groove and a lower elbow pipe through welding. The structure of the lower elbow pipe can slow down the diving potential energy of the broken steel balls.

[0010] The chute is a grid - type structure composed of a chute flange, a round bar screen, and fastening bands. A groove with a depth of 5 - 8 mm is provided inside the chute flange. Both ends of the bar screen are inserted into the groove of the chute flange and welded by arc welding; multiple fastening bands are welded along the circumference of the bar screen to prevent the chute from deforming; the chute is placed at an overall inclination of 30°. The chute flange at the upper end is coaxially matched with the elbow flange of the iron - receiving groove, and the chute flange at the lower end is connected to the material - guiding groove by bolts. The broken steel balls are recycled through the material - guiding groove to the steel ball recovery box; the bar screen is composed of round steel with a diameter of 15 mm arranged along the circumference of the chute flange, and a gap with an included angle of 5 - 10° is provided between adjacent round steel; the distance between adjacent fastening bands is 300 mm.

[0011] A wool felt seal is adopted between the diversion cylinder and the ore - discharging box body. The wool felt is clamped by two steel plates and fixed to the ore - discharging box body by bolts.

[0012] A water - sprinkling pipe passing through the ore - discharging box body is arranged above the chute. The right end of the water - sprinkling pipe is welded to the ore - discharging box body, and the left side is suspended inside the ore - discharging box body by multiple steel wires. The water outlet is evenly perforated along the axis of the pipe, and the water - sprinkling mouth is placed downward. The ore pulp particles carried by the broken steel balls in the chute are washed into the ore - discharging box body through the water - sprinkling pipe to prevent resource waste caused by the broken steel balls carrying ore pulp.

[0013] Beneficial effects: The utility model recovers broken steel balls through an arc-shaped iron remover, avoiding the phenomenon of "ball milling balls" in the mill, reducing the steel ball loss by 3% - 4%, and at the same time solving the problem that broken steel balls are prone to damage the circulating pump and cyclone equipment, improving the slurry circulation efficiency of the mill, and reducing the comprehensive energy consumption of the slurry circulation system by 10% - 20%. In the lifting cylinder of the utility model, spiral ribs and lifting bars are welded, further avoiding the phenomenon that irregular broken balls fall into the cylinder due to magnetic tumbling during the grasping process, improving the grasping efficiency of the magnetic force on irregular broken balls, and the rotation of the spiral ribs in the lifting cylinder can also increase the flow rate of the pulp, ensuring the discharge rate of the mill. The utility model changes the discharge end of the iron receiving trough into a bent pipe structure, which can effectively slow down the diving potential energy of the steel balls during the falling process and improve the stability of the iron receiving trough and the grid-shaped chute structure. The utility model designs the chute as a bar screen type grid structure. When the sprinkler pipe flushes, the pulp particles adhered to the irregular broken balls can be washed into the pulp pool, preventing the waste of resources caused by the entrainment of broken steel balls with pulp and facilitating the separation of pulp and magnetic materials. Brief description of the drawings

[0014] Figure 1 is a schematic structural diagram of the utility model;

[0015] Figure 2 is a schematic structural diagram of the iron receiving trough and the chute of the utility model.

[0016] In the figure: 1, magnetic arc; 2, lifting cylinder; 3, iron receiving trough; 4, guide cylinder; 5, chute; 6, discharge box; 7, sprinkler pipe; 8, guide trough; 9, steel ball recovery box; 51, chute flange; 52, bar screen; 53, fastening band. Specific embodiments

[0017] The following describes the utility model in detail with reference to the drawings and embodiments.

[0018] As Figure 1 and Figure 2As shown in the figure, the utility model provides a grid-type iron unloading device in a material balance system, which includes a discharge system and a volleyball system. The discharge system includes a lifting cylinder 2, a diversion cylinder 4 and a discharge box 6. The lifting cylinder 2 and the diversion cylinder 4 are coaxially connected to the discharge bushing through flanges. Spiral ribs with the same rotation direction as the mill are welded on the inner wall of the lifting cylinder 2 to ensure the fluidity of the pulp and improve the discharge rate. The left side of the discharge box 6 is matched with the diversion cylinder 4 to introduce the pulp. A conical opening is provided at the lower part of the discharge box 6 to discharge the pulp into the slurry circulation box. The volleyball system includes a magnetic arc 1, an iron receiving groove 3, a chute 5, a water sprinkling pipe 7, a material guiding groove 8 and a steel ball recovery box 9. The magnetic arc 1 is fixed on the magnetic track through anchor bolts to prevent the magnetic arc 1 from sliding when the mill is running. The iron receiving groove 3 is composed of an upper trumpet-shaped groove and a lower elbow connected by welding. The lower elbow structure can slow down the diving potential energy of the broken steel balls. The chute 5 is a grid-type chute structure composed of a chute flange 51, a round bar screen 52 and a fastening band 53. The upper end of the chute 5 is coaxially connected to the elbow flange of the iron receiving groove 3, and the lower end is connected to the discharge box 6 and the material guiding groove 8 to recover the broken steel balls. A water sprinkling pipe 7 passing through the discharge box 6 is arranged above the grid-type chute 5. The pulp particles carried by the broken steel balls in the chute 5 are washed into the discharge box 6 through the water sprinkling pipe 7 to prevent the waste of resources caused by the broken steel balls entraining the pulp.

[0019] The magnetic arc 1 is composed of a magnetic pole and a magnetic track. The magnetic arc 1 can slide left and right through the magnetic track and be installed and disassembled in cooperation with the lifting cylinder 2. A 50-60 mm thick wooden board is filled between the flange of the magnetic arc 1 and the flange of the lifting cylinder 2 to prevent the magnetic attraction between the magnetic arc 1 and the flange of the lifting cylinder 2.

[0020] Lifting bars passing through the spiral ribs are welded in the lifting cylinder 2, which can improve the efficiency of grasping steel balls.

[0021] Mutually cooperating flange stop mouths are provided in the flanges where the lifting cylinder 2, the diversion cylinder 4 and the discharge bushing are coaxially connected. The tolerance grade of the flange stop mouth is IT11 to prevent the lifting cylinder 2 from jumping up and down and rubbing against the surface of the magnetic system.

[0022] The spiral ribs in the lifting cylinder 2 are a double-headed spiral structure with 1-1.5 turns and a pitch of 500 mm.

[0023] The iron receiving groove 3 is made of low-magnetic 316 stainless steel material and is composed of an upper trumpet-shaped groove and a lower elbow connected by welding. The lower elbow structure can slow down the diving potential energy of the broken steel balls and is beneficial to the stability of the overall structure.

[0024] The chute 5 is a grid-type structure composed of a chute flange 51, a round bar screen 52, and a fastening band 53. There is a groove with a depth of 5 - 8 mm in the chute flange 51. Both ends of the bar screen 52 are inserted into the groove of the chute flange 51 and welded by arc welding. A plurality of fastening bands 53 with a width of 20 mm are welded along the circumference of the bar screen 52 to prevent the chute 5 from deforming. The chute 5 is placed at an overall inclination of 30°. The chute flange 51 at the upper end is coaxially fitted with the elbow flange of the iron receiving chute 3, and the chute flange 51 at the lower end is connected to the feeding chute 8 by bolts. The crushed steel balls are recovered through the feeding chute 8 and the steel ball recovery box 9. The bar screen 52 is composed of round steel with a diameter of 15 mm arranged along the circumference of the chute flange 51, and there is a gap with an included angle of 5 - 10° between adjacent round steel. The spacing between the fastening bands 53 is 300 mm, and the structural stability of the chute 5 is ensured by the fastening bands 53 and the chute flanges 51 at both ends.

[0025] A wool felt seal is adopted between the guide cylinder 4 and the ore discharge box body 6. The wool felt is clamped by two steel plates and fixed to the ore discharge box body 6 by bolts to prevent slurry leakage.

[0026] A water sprinkling pipe 7 passing through the ore discharge box body 6 is arranged above the chute 5. The right end of the water sprinkling pipe 7 is welded to the ore discharge box body 6, and the left side is suspended inside the ore discharge box body 6 by a plurality of steel wires. The water outlet holes are evenly perforated along the axis of the pipe, and the water sprinkling openings face downward. The ore pulp particles carried by the crushed steel balls in the chute 5 are washed into the ore discharge box body 6 through the water sprinkling pipe 7 to prevent the waste of resources caused by the crushed steel balls entraining the ore pulp.

[0027] The utility model can effectively recover the crushed steel balls through the arc-shaped iron remover, solves the problem that the slurry circulation pump and the hydrocyclone are damaged due to incomplete removal of the crushed steel balls, avoids the phenomenon of "ball milling ball" in the mill, can reduce the steel ball loss by 3% - 4%, and at the same time solves the problem that the crushed steel balls are easy to damage the circulation pump and the hydrocyclone equipment, improves the slurry circulation efficiency of the mill, and can reduce the comprehensive energy consumption of the slurry circulation system by 10% - 20%. In the lifting cylinder of the utility model, spiral ribs and lifting bars are welded to further avoid the phenomenon that the irregular crushed balls fall into the cylinder due to magnetic tumbling during the grabbing process, improve the grabbing efficiency of the magnetic force on the irregular crushed balls, and the flow rate of the ore pulp can also be increased by the rotation of the spiral ribs in the lifting cylinder to ensure the discharge rate of the mill. The utility model changes the discharge end of the iron receiving chute into an elbow structure, which can effectively slow down the diving potential energy of the steel balls during the falling process and improve the stability of the iron receiving chute and the grid-type chute structure. The utility model designs the chute as a bar screen type grid structure. When the water sprinkling pipe flushes, the ore pulp particles adhered to the irregular crushed balls can be washed into the ore pulp pool, preventing the waste of resources caused by the crushed steel balls entraining the ore pulp and facilitating the separation of the ore pulp and the magnetic materials.

[0028] The grid-type iron unloading device of the utility model solves the problem that when the existing mill operates, steel balls are broken or small steel balls are not thoroughly removed, resulting in damage to subsequent cyclones or crushing equipment, and further solves the problem of difficult recovery of broken steel balls carrying pulp particles.

[0029] The above embodiments of the utility model are only examples and not the only ones. All changes within the scope of the utility model or equivalent to the scope of the utility model are encompassed by the utility model.

Claims

1. A grid type iron unloading device in a material balance system, characterized in that: The invention comprises a discharge system and a discharge ball system, wherein the discharge system comprises a lifting cylinder (2), a guide cylinder (4) and a discharge box (6), wherein the lifting cylinder (2) and the guide cylinder (4) are coaxially connected with a discharge bushing through a flange, a spiral rib having the same rotation direction as that of a mill is welded on the inner wall of the lifting cylinder (2), the discharge box (6) cooperates with the guide cylinder (4) on the left side to introduce ore slurry, and a conical opening is provided at the bottom of the discharge box (6) to discharge the ore slurry into a slurry circulation box; the discharge ball system comprises a magnetic arc (1), an iron receiving trough (3), a chute (5), a watering pipe (7), a guide trough (8) ) and a steel ball recovery box (9), the magnetic arc (1) is fixed on the magnetic rail by anchor bolts, the iron trough (3) is connected to the lower elbow by welding through the upper trumpet-shaped groove; the chute (5) is a grid-type structure, the upper end of the chute (5) is coaxially connected to the elbow flange of the iron trough (3), and the lower end is connected to the ore discharge box (6) and the guide chute (8) to recover the broken steel balls; a watering pipe (7) is arranged above the grid-type chute (5) and passes through the ore discharge box (6), and the ore pulp particles carried by the broken steel balls in the chute (5) are flushed into the ore discharge box (6) through the watering pipe (7).

2. The grid type iron unloading device in the material balance system according to claim 1, characterized in that: The magnetic arc (1) is composed of a magnetic pole and a magnetic track. The magnetic arc (1) can slide left and right through the magnetic track and cooperate with the lifting cylinder (2) for installation and removal. A 50-60 mm thick wooden board is filled between the magnetic arc (1) and the flange of the lifting cylinder (2) to prevent the magnetic arc (1) and the flange of the lifting cylinder (2) from being magnetically attracted.

3. The grid type iron unloading device in the material balance system according to claim 1, characterized in that: A lifting bar passing through the spiral rib is welded inside the lifting cylinder (2), thereby improving the efficiency of grabbing the steel balls.

4. The grid type iron unloading device in the material balance system according to claim 1, characterized in that: The flanges coaxially connected to the lifting cylinder (2), the guide cylinder (4) and the discharge bushing are all provided with mutually matching flange stoppers, and the flange stopper tolerance grade is IT11 grade, so as to prevent the lifting cylinder (2) from jumping up and down and scratching the surface of the magnetic system.

5. The grid type iron unloading device in the material balance system according to claim 1, characterized in that: The inner spiral ribs of the lifting cylinder (2) are double-headed spiral structures with 1 to 1.5 turns and a pitch of 500 mm.

6. The grid type iron unloading device in the material balance system according to claim 1, characterized in that: The iron receiving groove (3) is made of low-magnetic 316 stainless steel material, and is formed by welding an upper trumpet-shaped groove and a lower curved pipe. The lower curved pipe structure can slow down the dive potential energy of the broken steel balls.

7. The grid type iron unloading device in the material balance system according to claim 1, characterized in that: The chute (5) is a grid-type structure consisting of a chute flange (51), a circular bar screen (52) and a fastening belt (53). A groove of 5 to 8 mm is provided in the chute flange (51). Both ends of the bar screen (52) are inserted into the groove of the chute flange (51) and welded by arc welding. The bar screen (52) is welded with a plurality of fastening belts (53) along the circumference to prevent the chute (5) from deformation. The chute (5) is placed at an inclination of 30° as a whole, and the upper The chute flange (51) at the end is coaxially matched with the elbow flange of the iron trough (3), and the chute flange (51) at the lower end is connected to the guide trough (8) by bolts, and the broken steel balls are recovered through the guide trough (8) and the steel ball recovery box (9); the bar screen (52) is composed of round steels with a diameter of 15 mm arranged along the circumference of the chute flange (51), and gaps with an angle of 5 to 10 degrees are provided between adjacent round steels; the spacing between each fastening belt (53) is 300 mm.

8. The grid type iron unloading device in the material balance system according to claim 1, characterized in that: A wool felt is used to seal between the guide tube (4) and the ore discharge box (6); the wool felt is clamped by two steel plates and fixed to the ore discharge box (6) by bolts.

9. The grid type iron unloading device in the material balance system according to any one of claims 1 to 8, characterized in that: A watering pipe (7) is arranged above the chute (5) and passes through the ore discharge box (6). The right end of the watering pipe (7) is welded to the ore discharge box (6), and the left end is suspended inside the ore discharge box (6) through a plurality of steel wire ropes. The water outlet is evenly perforated along the axial direction of the pipe, and the watering port is placed downward. The ore pulp particles carried by the crushed steel balls in the chute (5) are flushed into the ore discharge box (6) through the watering pipe (7), so as to prevent the waste of resources caused by the crushed steel balls carrying the ore pulp.

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