A magnetic stone and steel ball separation device

Abstract

The present invention relates to a magnetic stubborn stone and steel ball separation device, the magnetic stubborn stone and steel ball separation device is a mineral processing shaking table structure, including a transmission device, a frame and a bed surface, the bed surface is movably arranged on the frame, the upper end of the bed surface is connected to the transmission device, and the bed surface can be driven to reciprocate on the frame under the periodic motion of the transmission device; the entire bed surface is tilted around an angle of its lower end, and a plurality of grooves are arranged on the bed surface along the descending direction of the bed surface, and the bed surface is a shovel-shaped bed surface; a partition guide plate is arranged obliquely upward at the middle part of the bottom end of the bed surface, and the partition guide plate can play a role of diversion, so as to prevent the magnetic stubborn stone on the bed surface above the partition guide plate from falling into the steel ball feeding area; the groove width is 3-5 mm, and the groove depth is 1-2 mm; the plane angle between the bed surface and the horizontal plane is 8°-10°. The present invention can realize the efficient separation of most magnetic stubborn stones and steel balls.

Description

Technical Field

[0001] The invention relates to the technical field of iron ore dressing equipment, and in particular to a magnetic stone and steel ball separation device. Background Art

[0002] In the process of mineral resource development, most metal mine beneficiation plants have crushing and grinding processes. Since the semi-autogenous grinding process has the advantages of short process, high degree of automation, and good on-site working environment, most beneficiation plants usually use semi-autogenous grinding machines as grinding equipment. Steel balls are added to the semi-autogenous grinding machine as grinding media to grind the initially crushed ore. The steel balls as grinding media can fully dissociate the ore, but they will also be worn and reduced by the reaction as they work continuously, and eventually be discharged from the semi-autogenous grinding machine. In addition, due to the different causes of ores in nature, some ores are difficult to be further reduced after being ground to a certain size during the grinding process, forming relatively stable ores or gravels, called "stubborn stones", which will eventually be discharged from the semi-autogenous grinding machine.

[0003] In order to make full use of mineral resources and protect the environment, the stubborn stone needs to be further processed and the discharged steel balls need to be recycled, so the stubborn stone and steel balls discharged from the semi-autogenous mill need to be separated. For non-magnetic stubborn stone, it is easy to separate the waste steel balls from it through magnetic separation equipment; but for magnetic stubborn stone, it is difficult to separate the waste steel balls from it through magnetic separation equipment. The amount of stubborn stone and steel balls produced by the ore dressing plant is large, and it is not suitable to separate them manually.

[0004] The following methods are commonly used to separate the stubborn stones and steel balls discharged from the semi-autogenous mill:

[0005] (1) For non-magnetic stubborn stones, a magnetic arc and metal detector + electromagnet iron remover are usually used to remove scrap steel balls and other iron parts from the stubborn stones. However, for magnetic stubborn stones (magnetite ore), this method cannot separate them well, and some magnetic stubborn stones will be sucked out by the magnetic force, resulting in a low iron removal rate and a poor separation effect. In addition, the stubborn stones in this scheme are processed by returning the stubborn stones to the semi-autogenous mill for grinding again, and repeating this process until the stubborn stones are completely ground into powder. Since the stubborn stones are relatively stable ores or gravels formed after primary crushing and primary grinding, they can only be ground into powder after repeated cycles in the semi-autogenous mill, which will increase production costs invisibly.

[0006] (2) Small-scale production mines use manual sorting for separation. Although manual sorting can separate them well, the labor intensity is high and this method cannot be applied to mines with large production scales. In addition, the method of handling stubborn stones in this scheme is to return the stubborn stones to the semi-autogenous grinder for grinding again, and repeat this process until the stubborn stones are completely ground into powder. Since stubborn stones are relatively stable ores or gravels formed after primary crushing and grinding, they can only be ground into powder after repeated cycles in the semi-autogenous grinder, which will invisibly increase production costs.

[0007] (3) X-ray identification + spraying is used to remove iron. This technology has high requirements for the spraying device and metal parts development technology, more equipment control modules, high cost investment, high maintenance cost, and spraying cannot separate large steel balls. Another solution for the treatment of stubborn stones is to return the stubborn stones to the semi-autogenous mill for grinding again, and repeat this process until the stubborn stones are completely ground into powder. Since stubborn stones are relatively stable ores or gravels formed after primary crushing and primary grinding, they can only be ground into powder after repeated cycles in the semi-autogenous mill, which will increase production costs invisibly.

[0008] The ore dressing shaking table is a common equipment for sorting fine-grained ores. It is usually composed of three parts: the bed surface, the frame and the transmission mechanism. In addition, there are also flushing troughs, ore feeding troughs, machine bases, etc. The entire bed surface is supported or lifted by the frame, and a slope adjustment device is installed on the frame.

[0009] The ore-dressing shaking table can make the ore particles move in different directions according to their density and particle size, and spread out in a fan-shaped manner along the diagonal line from the feed trough, and then be discharged along the edge of the bed in sequence. The discharge line is very long and can accurately produce a variety of products of different qualities, such as concentrate, sub-concentrate, medium concentrate and tailings. The ore-dressing shaking table is used as a gravity separation equipment and has been widely used in the separation of minerals such as placer gold, mainly for gold or coal selection. The ore particles on the shaking table are acted upon by the following three mutually perpendicular forces: (1) the gravity of the ore particles in the medium; (2) the fluid dynamics of the lateral water flow and slurry flow; (3) the power of the differential reciprocating motion of the bed surface.

[0010] How to achieve efficient separation of magnetic rock and ore is of great practical significance to industrial and mining enterprises. Summary of the invention

[0011] In view of the above existing technologies and methods for separating steel balls and iron parts from hard stones, the purpose of the present invention is to provide a magnetic hard stone and steel ball separation device, which can achieve efficient separation of most magnetic hard stones and steel balls.

[0012] The specific technical scheme is: a magnetic stone and steel ball separation device, which is a mineral processing shaking table structure, including a transmission device, a frame and a bed surface, the bed surface is movably arranged on the frame, the upper end of the bed surface is connected to the transmission device, and can drive the bed surface to reciprocate on the frame under the periodic movement of the transmission device; the entire bed surface is tilted around an angle at its lower end, and a plurality of grooves are arranged on the bed surface along the descending direction of the bed surface; the bed surface is a shovel-shaped bed surface, that is, baffles are arranged on the upper end and both sides of the bed surface, and the lower end of the bed surface is open; a partition guide plate is arranged obliquely upward in the middle of the bottom end of the bed surface, and the partition guide plate can play a role of diversion to prevent the magnetic stone on the bed surface above the partition guide plate from falling into the steel ball unloading area; the groove width is 3~5mm, and the groove depth is 1~2mm; the plane angle between the bed surface and the horizontal plane is 8°~10°.

[0013] Furthermore, a stubborn stone bin is arranged at the discharge port above the dividing guide plate at the bottom end of the bed surface, and a steel ball bin is arranged at the discharge port below the dividing guide plate at the bottom end of the bed surface.

[0014] Furthermore, the total length of the partition guide plate is 1 / 10 to 1 / 5 of the length of the bed surface, and the acute angle between the partition guide plate and the bottom end of the bed surface is 45° to 80°.

[0015] Furthermore, the partition guide plate is arranged to cross the center line of the bed surface, and the length of the partition guide plate crossing the center line of the bed surface is less than 1 / 10 of the length of the partition guide plate.

[0016] Furthermore, the highest point on the top of the bed surface is set as the feeding end.

[0017] Furthermore, the diameter of the steel ball is greater than 3 cm.

[0018] The invention provides a magnetic pebble and steel ball separation device. The device utilizes the difference in density between steel balls and pebble. By adjusting the bed angle of a pebble and steel ball vibration separation device, the pebble and steel balls moving forward and backward on the bed are separated left and right under the action of vibration force and gravity, and then fall into a pebble bin and a steel ball bin respectively through fine grooves and partition plates on the bed, thereby realizing efficient separation of most magnetic pebble and steel balls. The device is used to solve the problems of the inability to effectively separate magnetic pebble and steel balls in a semi-autogenous grinding mill, complex operation, high manual labor intensity, high equipment investment, high maintenance cost and production cost, low iron removal efficiency, and sufficient recycling of pebble. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view schematic diagram of the present invention;

[0020] Figure 2 It is a top view schematic diagram of the present invention;

[0021] Among them, 1 – transmission device; 2 – feed end; 3 – bed surface; 4 – frame; 5 – steel ball bin; 6 – stone bin; 7 – groove; 8 – partition guide plate; 9 – baffle. DETAILED DESCRIPTION

[0022] like Figure 1 and 2 As shown, a magnetic stone and steel ball separation device is a mineral processing shaking table structure, including a transmission device 1, a frame 4 and a bed surface 3, the bed surface 3 is movably arranged on the frame, and the upper end of the bed surface 3 is connected to the transmission device 1. When the transmission device 1 moves periodically, it can drive the bed surface 3 to reciprocate on the frame. It is well known to those skilled in the art that the mineral processing shaking table structure is an existing mature technology.

[0023] The difference is that the entire bed surface is tilted around an angle at its lower end, and the plane angle between the bed surface 3 and the horizontal plane is 8°~10°; a number of grooves 7 are arranged on the bed surface 3 along the descending direction of the bed surface, and the width of the grooves 7 is 3~5mm, and the depth of the grooves is 1~2mm; because the stubborn stone is an irregular shape (with edges and corners), the grooves can be set to block the stubborn stone to a certain extent, and the steel ball is generally larger than 3cm in size, and its movement will not be restricted by the grooves; this arrangement can make the stubborn stone descend along the bed surface ( Figure 2 From right to left), and the steel ball will tilt the bed surface ( Figure 2 The magnetic stone and the steel ball are then rolled in the direction of top to bottom to separate.

[0024] The bed surface 3 is a shovel-shaped bed surface, that is, the upper end of the bed surface 3 (corresponding to Figure 1 and 2 The right side of the bed) and both sides (corresponding to Figure 1 and 2 The upper and lower ends of the bed surface are provided with baffles 9, and the lower end of the bed surface 3 is open, so that the stubborn stone and the steel ball are finally removed from the lower end of the bed surface (the lower end of the bed surface is the end of the bed surface, corresponding to Figure 1 and 2 The left end of the bed surface) is used to prevent the steel ball from rolling out from the side of the bed surface.

[0025] A partition guide plate 8 is disposed obliquely upward in the middle of the bottom end of the bed surface. The total length of the partition guide plate 8 is 1 / 10 to 1 / 5 of the length of the bed surface 3, and the acute angle between the partition guide plate 8 and the bottom end of the bed surface 3 is 45° to 80°. The partition guide plate 8 can play a role of diversion, preventing the magnetic stubborn stone on the bed surface above the partition guide from falling along the bed surface groove to the lower part of the bed surface. As the bed surface becomes steeper and steeper, the stubborn stone is easy to cross the center line of the bed surface and fall into the steel ball feeding area. The partition plate cannot be too long, otherwise it is easy to intercept the steel ball in advance and cause the steel ball to roll out of the stubborn stone feeding area. The partition plate cannot be too short, otherwise it will not have a good diversion effect. Because the shapes of the pebbles are different, the magnetic size of the pebbles and the size of the steel balls vary, so the length and inclination of the separating guide plate 8 are not very precise values, and an optimal value needs to be determined based on a large number of tests. Therefore, this method can achieve the separation of most of the magnetic pebbles and steel balls. For the magnetic pebbles and steel balls that are not completely separated, manual sorting is sufficient due to their small number.

[0026] Preferably, the partition guide plate 8 is arranged to cross the center line of the bed surface 3, and the length of the partition guide plate 8 crossing the center line of the bed surface 3 is less than 1 / 10 of the length of the partition guide plate 8, that is, the partition guide plate 8 preferably crosses the center line of the bed surface 3, but not too long; the position of the partition guide plate 8 is determined based on the inclination angle of the partition guide plate 8, the length and the relationship with the center line of the bed surface.

[0027] Preferably, a stone bin 6 is provided at the discharge port above the dividing guide plate 8 at the bottom end of the bed surface, and a steel ball bin 5 is provided at the discharge port below the dividing guide plate 8 at the bottom end of the bed surface, so as to facilitate the timely collection of stones and steel balls.

[0028] Furthermore, the highest point on the top of the bed surface 3 is set as the feed end 2 (in the dotted box), that is, the feed end 2 is at least above the center line of the bed surface, ensuring that the stubborn stone falls onto the bed surface 3 above the center line, avoiding the stubborn stone being restricted by the groove and directly falling along the groove into the steel ball unloading area.

[0029] Basic principle: Since the density of gangue is 1-4g / cm 3 The density of magnetite is 5.16~5.18g / cm 3 , the density of the steel ball is 7.0~7.8g / cm 3 , adjust the bed angle of the stone and steel ball vibration separation device, and under the action of vibration force and gravity, the stones and steel balls moving back and forth on the bed are separated left and right, and then fall into the stone bin and steel ball bin respectively through the grooves and partition plates of the bed, thereby realizing the separation of the stones and steel balls.

Claims

1. A magnetic stone and steel ball separation device, the magnetic stone and steel ball separation device is a mineral processing shaking table structure, comprising a transmission device (1), a frame and a bed surface (3), the bed surface (3) is movably arranged on the frame (4), the upper end of the bed surface (3) is connected to the transmission device (1), and when the transmission device (1) moves periodically, it can drive the bed surface (3) to make reciprocating motion on the frame (4); It is characterized in that The entire bed surface is tilted around an angle at its lower end, and a plurality of grooves (7) are arranged on the bed surface (3) along the descending direction of the bed surface; The bed surface (3) is a shovel-shaped bed surface, that is, baffles (9) are provided at the upper end and both sides of the bed surface (3), and the lower end of the bed surface (3) is open; A partition guide plate (8) is arranged obliquely upward in the middle of the bottom end of the bed surface, and the partition guide plate (8) can play a role of diversion, thereby preventing the magnetic stubborn stones located on the bed surface above the partition guide plate from falling into the steel ball unloading area; The width of the groove (7) is 3-5 mm, and the depth of the groove is 1-2 mm; The plane angle between the bed surface (3) and the horizontal plane is 8° to 10°; The diameter of the steel ball is greater than 3cm; The total length of the partition guide plate (8) is 1 / 10 to 1 / 5 of the length of the bed surface (3), and the acute angle between the partition guide plate (8) and the bottom end of the bed surface (3) is 45° to 80°; The partition guide plate (8) is arranged to cross the center line of the bed surface (3), and the length of the partition guide plate (8) crossing the center line of the bed surface (3) is less than 1 / 10 of the length of the partition guide plate (8).

2. A magnetic stone and steel ball separation device as claimed in claim 1, characterized in that: A stone bin (6) is provided at the discharge port above the dividing guide plate (8) at the bottom end of the bed surface, and a steel ball bin (5) is provided at the discharge port below the dividing guide plate (8) at the bottom end of the bed surface.

3. A magnetic stone and steel ball separation device as claimed in claim 1, characterized in that: The highest point on the top of the bed surface (3) is set as the feeding end (2).

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