CN107035375B - A kind of marine mining engineering machinery - Google Patents

Abstract

The invention discloses a marine mining engineering machinery, which comprises a hull with a concentrate bin, a tailing bin and two raw ore bins. The slurry is pumped into the second raw ore bin, and then the impurities are separated by a vibrating screen, and the concentrate sand selected by the magnetic separator is sent into the concentrate bin by a screw conveyor and a belt conveyor. When the concentrate reaches a certain position, the sand pump stops working; when all the raw ore in the first raw ore bin is pumped into the second raw ore bin, the concentrate in the concentrate bin is sent into the second slurry pump through the second slurry pump. A raw ore bin, while the tailings sand is transported to the seabed far away from the mining area through the tailings backfill pipeline for backfilling on site. The invention has simple treatment for the tailings, does not cause adverse impact on the environment, and can make full use of the ore storage space, so as to save transportation capacity and reduce mining costs.

Description

A marine mining engineering machinery

technical field

The invention relates to the technical field of mining, in particular to a marine mining engineering machine for collecting raw ore sand in the deep sea.

Background technique

With the dwindling of land mineral resources, people began to turn their attention to the sea, which is rich in mineral resources. In some areas, people found a large number of coastal placer, mainly titanium-containing magnetite. At present, the usual mining method It uses an offshore mining platform or a mining ship to pump the ore from the seabed to the mining platform or mining ship, and then uses the corresponding slurry pump to transport the collected raw ore to the transshipment transport ship. The transport ship will The raw ore is transported to the onshore concentrator for beneficiation to form concentrated ore that can be used for smelting. For example, a kind of " deep-sea collecting and distributing mining system " disclosed in Chinese patent document, announcement number is CN1065191C, and this system comprises mining machine, conveying pipe, water vessel or water platform, the upper end of conveying pipe and water vessel or water platform Connected, the lower end is equipped with a transfer warehouse that extends into the water at a certain height from the ocean bottom. The ore collector and the conveying pipe are split. The ore collector has its own power, driving device, and buoyancy adjustment device. Drive to collect mines.

However, the existing offshore mining method has the following problems: because mining and mineral processing are carried out in different places, the raw ore sand transported by the transport ship contains a large amount of useless tailings sand, which not only wastes a lot of transport capacity, but also increases the cost. Moreover, the remaining tailings sand after beneficiation needs to be transshipped again, thus further increasing the cost, and improper handling of tailings sand will also cause serious environmental problems.

In addition, the existing beneficiation process usually requires the use of a magnetic separator, the basic principle of which is as follows: the raw ore is transported to the upper magnetic field area of a rotating drum with a high-intensity magnetic field inside, and the magnetic raw ore is adsorbed on the surface of the drum , the non-magnetic ore will not be absorbed by the drum, but will be thrown away directly by the drum. With the rotation of the drum, the raw ore will reach the non-magnetic field area of the drum and be thrown away, so as to realize the screening and separation of the raw ore. For example, a "ferro-titanium ore magnetic separator" disclosed in the Chinese patent literature, the publication number is CN103447149A, includes a frame, a magnetic separation mechanism and a feeding hopper; the magnetic separation mechanism includes a titanium concentration device, an iron and titanium separation device, titanium selection motor and iron-titanium separation motor; the titanium selection device is driven by a titanium selection motor and the lower side is equipped with a titanium concentrate discharge hopper, a titanium ore recovery hopper and a tailings discharge hopper; a titanium concentrate discharge hopper and a titanium ore The inlet side of the recovery hopper is equipped with a titanium concentrate precision regulator; the side of the tailings outlet hopper is equipped with a tailings precision regulator; the iron-titanium separation device is driven by an iron-titanium separation motor and includes a second 1. The second iron-titanium separation device; the side of the iron-titanium mixture lower hopper and the iron-titanium powder lower hopper arranged on the lower side of the first iron-titanium separation device and the lower side of the second iron-titanium separation device Iron and titanium sorting precision regulators are installed on one side of the iron-medium titanium discharge hopper and the iron powder discharge hopper, which can screen and separate minerals.

However, there is a problem of inaccurate mineral separation with magnetic separators. Since the grade of raw ore in the raw ore is distributed in a gradient, the magnetic field strength in the drum needs to be set to a reasonable value in order to be able to absorb such as grades at 30%. above ore. Due to the impact of the raw ore, the ore falling on the surface of the drum with a grade slightly higher than 30% is likely to be directly thrown off by the drum due to the impact, resulting in a waste of resources. If the strength of the magnetic field in the drum is increased, the selected concentrated ore will be mixed with a part of tailings with a grade lower than 30%.

Contents of the invention

An object of the present invention is to solve the problems of large waste of transport capacity and troublesome tailings disposal in the existing deep-sea mining mode, and provide a marine mining engineering machine whose tailings are easy to handle and will not cause adverse effects on the environment. And cocoa can make full use of the ore storage space to save transportation capacity and reduce mining costs.

Another object of the present invention is to provide a marine mining engineering machine capable of fully and accurately beneficiating raw ore sand in order to solve the problems of inaccurate ore separation and easy resource waste in deep-sea mining with magnetic separators. Effectively avoid waste of resources.

In order to achieve the above object, the present invention adopts the following technical solutions:

A kind of marine mining engineering machinery, including a self-propelled hull and a sand pump. The hull is provided with two separated raw ore bins, a concentrate bin and a tailing bin. The sand outlet of the sand pump passes through a pipeline. It is connected with the first raw ore bin, the first slurry pump is installed between the two raw ore bins, the second slurry pump is installed between the concentrate bin and the first raw ore bin, and the hull is also equipped with a magnet for beneficiation. Separator and tailings pump for extracting tailings sand. The magnetic separator has a tailings sand output port and a concentrate sand output port. A concentrate sand conveying device is connected between the concentrate sand output port and the concentrate bin, and the tailings sand output The mouth of the tailings pump is connected to the tailings bin through the tailings sand collection pipeline. The concentrate bin and the first raw ore bin are respectively equipped with liquid level sensors. The sand suction port of the tailings pump is connected to the lower part of the tailings bin through a pipeline. The sand outlet is connected to one end of a tailings backfill pipeline suspended on the sea surface, and the other end of the tailings backfill pipeline extends to the seabed outside the mining area, and the raw ore sand in the second raw ore bin is sent into the magnetic separator through corresponding pumps , the concentrate sand screened by the magnetic separator is output from the concentrate sand output port, and sent to the concentrate bin through the concentrate sand conveying device, and the tailing sand output from the sand outlet of the tailing sand pump is sent back to mining through the tailings backfill pipeline When the concentrate sand in the concentrate bin reaches the position of the liquid level sensor, the sand pump is controlled to stop working; when the raw ore sand in the first raw ore bin is fully pumped into the second by the first slurry pump In the raw ore bin, the liquid level sensor in the first raw ore bin sends out a signal, and at this time the second slurry pump starts to send the concentrate sand in the concentrate bin into the first raw ore bin.

The marine mining engineering machinery of the present invention integrates mining and beneficiation. First, the raw ore sand in the seabed of the mining area is pumped into the first raw ore bin by a sand pump, and the first slurry pump pumps the raw ore sand in the first raw ore bin. into the second raw ore bin to ensure the continuous operation of the sand pump, and the raw ore in the second raw ore bin is separated from the concentrate by a magnetic separator, so that the concentrate can be transported through the concentrate conveyor The tailings separated by the magnetic separator can be backfilled to the seabed far away from the mining area through the tailings backfill pipeline by the tailings pump, which can greatly reduce the waste of transport capacity and greatly simplify the tailing process. The processing procedure of ore sand reduces the processing cost of tailings sand. When the concentrated ore in the concentrate bin reaches the position of the liquid level sensor, the liquid level sensor sends out a signal to control the sand pump to stop working. At this time, the first slurry pump continues to work until the raw ore in the first raw ore bin. The ore is completely pumped into the second raw ore bin by the first slurry pump. In this way, the liquid level sensor in the first raw ore bin sends out an empty signal. The concentrated ore sand is sent into the first raw ore bin, that is to say, the first raw ore bin at this time is used to store the concentrated ore sand, so that the space of the hull can be fully utilized. In addition, since the tailings backfill pipeline for transporting the tailings sand is suspended on the sea surface, it is convenient to determine the location of the tailings sand transporting.

Preferably, the volume ratio between the first raw ore bin, the second raw ore bin and the concentrate bin is 1:1:2 to 1:1:4.

In this way, when the sand pump stops working, the first slurry pump can completely pump the raw ore in the first raw ore bin into the second raw ore bin, and when the concentrate in the concentrate bin reaches the position of the liquid level sensor To ensure that the concentrate bin still has enough space to store the concentrate until the raw ore in the first raw ore bin is completely pumped out, and the space of the last vacant second raw ore bin can be minimized.

As preferably, a vibrating screen is provided above the magnetic separator, the vibrating screen is arranged obliquely and is connected with a vibrating motor, the bottom of the vibrating screen is provided with an upwardly opening ore collecting funnel, and the outlet at the bottom of the ore collecting funnel Located above the feed inlet of the magnetic separator, a sand collection funnel is provided below the lower side of the vibrating screen, and the outlet of the sand collection funnel is connected to the tailings sand collection pipeline.

A vibrating screen is installed above the magnetic separator, so that the raw ore is roughed before entering the magnetic separator for beneficiation, and impurities such as large reefs and garbage mixed in the raw ore cannot pass through the mesh of the vibrating screen. With the vibration of the vibrating screen, it rolls down into the sand collection funnel, and enters the tailings bin through the tailings sand collection pipe. The raw ore sand with fine particles falls into the ore collecting funnel below through the mesh of the vibrating screen, and enters the magnetic separator through the outlet at the lower part of the ore collecting funnel for mineral separation, which is beneficial to improve the magnetic separator. beneficiation efficiency. The vibrating screen is vibrated by the vibrating motor, which can significantly improve its screening efficiency and prevent useful raw ore from adhering to impurities and entering the tailings bin.

As a preference, a number of horizontally arranged thrust bars are arranged at intervals from low to high on the upper side of the vibrating screen, so that a barrier can be formed for the fine raw ore, preventing the useful raw ore from being unable to pass through quickly. The mesh of the vibrating screen will roll down along with the impurities into the sand collecting funnel along with the vibrating screen, while the impurities with larger dimensions can roll over the thrust bar and fall into the sand collecting funnel.

As a preference, the magnetic separator includes a long ore-dressing trough, and a vertical partition plate is arranged horizontally in the long ore-dressing long trough, and the separator plate separates the long ore-dressing trough into a magnetic separator feed port with one side opening upward and another In one side of the beneficiation area, there is a sand gap between the partition plate and the bottom surface of the long beneficiation tank, and a rotary conveyor belt arranged along the length direction is provided in the beneficiation area of the long beneficiation tank, and the concentrate sand output is located in the beneficiation area The bottom surface of the bottom is far away from the end of the separation plate, and the tailings sand output port is set between the concentrate sand output port and the separation plate on the bottom of the mineral processing area. One end of the dividing plate is extended and arranged to the side close to the dividing plate on the output port of the corresponding concentrated ore.

The magnetic separator of the prior art is a rotating drum for beneficiation, and a magnet is arranged in the drum, and the raw ore to be selected falls directly on the drum, that is to say, all the raw ore falls first. onto the rollers. Because the raw ore falling on the drum is easy to cause accumulation, the thickness is thicker, and the contact time and distance between the raw ore and the drum are short, and the raw ore falling on the drum is easily affected by the impact of the subsequent raw ore, so it is difficult to do When sufficient beneficiation is achieved, more useful raw ore sand is likely to be mixed in the separated tailings sand, and more low-grade tailings sand is likely to be mixed in the selected concentrate sand, which reduces the quality of the concentrate sand. In the magnetic separator of the present invention, what is used for beneficiation is an oblong rotary conveyor belt, and the raw ore sand falls in the feed port of the magnetic separator in a long trough for mineral separation. The impact of ore sand on the rotary conveyor belt for mineral processing, the raw ore sand in the feed port of the magnetic separator smoothly enters the mineral processing area of the long slot for mineral processing through the sand gap at the bottom of the partition plate. At this time, the rotary conveyor belt in the rotation On the one hand, the conveyor belt drives the raw ore sand to move toward the tailings sand output port and the concentrated ore sand output port, and at the same time, uses the magnetic attraction force of its internal magnet to absorb the raw ore sand that meets the requirements to the surface of the rotary conveyor belt. When the raw ore sand with lower grade reaches the outlet of the tailings sand, it will fall into the outlet of the tailings sand due to the action of gravity, while the raw ore sand with higher grade adsorbed on the rotary conveyor belt will fall into the outlet of the concentrate sand when it reaches the outlet of the concentrate sand. There is no magnet inside the type conveyor belt, so the raw ore sand loses its magnetic attraction and falls into the concentrated ore output port below, so as to realize the selection of raw ore sand. By reasonably controlling the sand passing gap and the length of the beneficiation area, the thickness of the raw ore moving on the bottom of the beneficiation area can be easily controlled, which is conducive to a long period of full contact between the raw ore and the rotary conveyor belt, which can Ensure the complete adsorption of high-grade raw ore on the rotary conveyor belt. Since the magnetic attraction only needs to overcome the gravity of the raw ore itself, it is convenient to accurately control the magnetic attraction, and the raw ore is simply adsorbed to the rotary conveyor belt by the magnetic attraction, so it can effectively avoid the entrainment of low-grade raw ore , so that the quality of the selected concentrate can be significantly improved. In particular, by properly setting the length of the beneficiation area and the distance between the tailings output port and the concentrate output port, the concentrate and tailings can be separated fully and accurately conveniently.

Preferably, the surface of the rotary conveyor belt is provided with several rows of protruding pillars at intervals, and the protruding pillars of two adjacent rows are staggered.

The convex column is beneficial to the rotary conveyor belt to push the raw ore to move along the bottom surface of the beneficiation long groove. At the same time, it can stir the moving raw ore, so that the useful concentrate in the raw ore can be fully absorbed into the rotary conveyor. Conveyor belt surface to avoid waste.

As a preference, the long ore dressing trough is provided with a water spray nozzle facing the sand passing gap at the bottom of the feed inlet of the magnetic separator.

The water flow sprayed from the water nozzle can push the raw ore sand to move while avoiding mutual interference with the convex posts on the surface of the rotary conveyor belt.

As a preference, the concentrate conveying device includes a screw conveyor and a belt conveyor, the screw conveyor includes a barrel, a rotating shaft arranged in the barrel, a spiral blade is arranged on the rotating shaft, and one end of the rotating shaft is related to the driving motor through a transmission mechanism One end of the barrel is provided with a material input port, and the other end is provided with a material output port. The input end of the belt conveyor is located below the material output port, and the output end of the belt conveyor is located above the concentrate bin. The pitch of the spiral blade From the end of the material input port to the end of the material output port, it gradually becomes smaller, and the barrel of the screw conveyor is provided with a water outlet hole.

In the prior art, a belt conveyor is usually used to transport concentrated ore. In the present invention, a screw conveyor is installed at the front end of the belt conveyor, and the pitch of the helical blade is from one end of the material input port to the other end of the material output port. Gradually become smaller, so that the screw conveyor can squeeze the concentrate while conveying the concentrate, so as to squeeze out the water in the concentrate, which is not only beneficial to the conveying of the belt conveyor, but also can reduce the concentration of the concentrate accordingly. The volume and weight of the ore are conducive to improving the storage efficiency of the concentrate bin.

As a preference, the rotating shaft of the screw conveyor is coaxially provided with a supporting hole at an end far away from the drive motor, a number of air injection holes passing through the supporting hole are provided on the circumferential surface of the rotating shaft, and the opening end of the supporting hole is adapted to a supporting shaft. A ventilation hole is arranged on the support shaft, one end of the ventilation hole communicates with the support hole, and the other end communicates with the compressed air source through the compressed air pipe.

When the screw conveyor is working, the compressed air can be sprayed out from the air jet hole on the rotating shaft through the ventilation hole and the support hole, so that the compacted raw ore sand in the barrel can be blown loose, and the raw ore sand in the barrel can be avoided from clogging.

As a preference, a gap opening and closing valve is connected to the compressed air pipe, and the gap opening and closing valve includes a cylindrical valve body, a rotatable valve core in the valve body, and a valve for driving the valve core at one end of the valve body. The speed-regulating motor, the side wall of the valve body is provided with an air inlet and an air outlet respectively connected with the compressed air pipe, and the valve core is provided with a compressed air passage which can be respectively connected with the air inlet and the air outlet.

When the speed regulating motor rotates, the compressed air channel of the valve core is briefly connected to the air inlet and the air outlet, so that the compressed air pipe forms a pulsed conduction, and then generates a pulsed air flow at the air jet hole of the rotating shaft, which can reduce The consumption of compressed air can also form a pulse-like impact on the raw ore, which is conducive to the loosening of the raw ore.

Therefore, the present invention has the following beneficial effects: the tailings are easily disposed of without adverse impact on the environment, and the ore storage space can be fully utilized to save transportation capacity and reduce mining costs.

Description of drawings

Fig. 1 is a kind of structural representation of the present invention.

Fig. 2 is a schematic flow chart of the present invention.

Fig. 3 is a structural schematic diagram of a magnetic separator in the present invention.

Fig. 4 is a structural schematic diagram of the screw conveyor and the gap opening and closing valve connected thereto in the present invention.

In the figure: 1. Hull 11, raw ore bin 12, tailings bin 13, concentrate bin 2, sand pump 3, magnetic separator 31, tailings sand output port 32, concentrate sand output port 33, beneficiation long slot 34, separation Separator 341, sand passing gap 35, magnetic separator feed port 36, beneficiation area 37, rotary conveyor belt 371, convex column 38, magnet 39, water spray nozzle 4, tailing sand pump 5, tailing sand collection pipe 6, tailing Mine backfill pipeline 61, floating ball 7, vibrating screen 71, thrust bar 8, slurry pump 81, ore collecting funnel 82, sand collecting funnel 83, first slurry pump 84, second slurry pump 9, Screw conveyor 90, belt conveyor 91, barrel 92, rotating shaft 921, support hole 922, air injection hole 93, material input port 94, material output port 95, support shaft 951, vent hole 96, gap opening and closing valve 961, valve Body 962, spool 963, speed regulating motor 964, air inlet 965, air outlet 966, compressed air channel.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1 and Figure 2, a marine mining engineering machinery is mainly used for the collection and beneficiation of seabed raw ore sand, specifically including a self-propelled hull 1 and a sand pump 2, which are separately arranged in the lower part of the hull There are two raw ore bins 11, a concentrate bin 13 and a tailings bin 12. The raw ore sand on the seabed is extracted by a high-power sand pump 2. The sand pump is powered by a diesel engine, and the sand suction port of the sand pump passes through The pipeline is connected to the seabed, and the sand outlet of the sand pump is connected to the first raw ore bin through the pipeline, so that the raw ore sand can be pumped into the first raw ore bin. In addition, the first slurry pump 83 needs to be set between the two raw ore bins, the second slurry pump 84 is set between the concentrate bin and the first raw ore bin, and the The liquid level sensors are respectively set inside.

Different from the prior art, the present invention is directly provided with a magnetic separator 3 for mineral separation on the hull, the magnetic separator has a tailings sand output port 31 and a concentrate sand output port 32, and at the concentrate sand output port A concentrate sand conveying device is connected with the concentrate bin.

In this way, when the sand pump pumps the raw ore from the seabed into the first raw ore bin, the first slurry pump starts, thereby pumping the raw ore in the first raw ore bin into the second raw ore bin, that is, It is said that the first raw ore warehouse here plays a turnover role. The raw ore in the second raw ore bin is sent to the magnetic separator through the corresponding slurry pump (not shown in the figure). The ore is output from the concentrate sand output port of the magnetic separator, and then transported to the concentrate bin by the concentrate conveying device for storage. The separated tailings sand is output from the tailings sand output port of the magnetic separator, and is transported to the tailings sand bin through the tailings sand collection pipeline 5 connected with the tailings sand bin. The lower part of the tailings bin is connected to the sand suction port of a tailings pump 4 through a pipeline, so the tailings pump can extract the tailings in the tailings bin in real time and transport them to the seabed away from the mining area through the tailings backfill pipeline 6 , so as to realize the on-site backfilling of tailings sand, so as to greatly simplify the processing difficulty of tailings sand and reduce the corresponding mining cost. In order to prevent the tailings backfill pipeline from being deviated from the seawater surge, we can connect a number of floating balls 61 on the tailings backfill pipeline at intervals close to the tailings pump, so that they can be suspended on the sea surface, so that they can be observed and controlled at any time. The position and state of the tailings sand can be smoothly and accurately backfilled to the seabed backfill area far away from the mining area.

When the concentrate sand in the concentrate bin gradually increases and reaches the position of the liquid level sensor, the liquid level sensor can send a signal to the controller, and the controller will control the sand pump to stop working. At this time, the first slurry pump continues to work and will The raw ore in the first raw ore bin is pumped into the second raw ore bin, and the raw ore in the second raw ore bin is continuously sent to the magnetic separator through the corresponding slurry pump for screening; when the first raw ore bin When the raw ore in the first slurry pump is completely pumped into the second raw ore bin, the first raw ore bin is in an empty state, and the liquid level sensor in the first raw ore bin sends a signal to the controller. At this time, the controller uses The second slurry pump is started to partially send the concentrate in the concentrate bin to the first raw ore bin for storage until all the raw ore in the second raw ore bin has been extracted and screened. At this time, the hull can Rely on its own power to return to the port to dock, so as to complete the deep sea mining work.

It can be understood that the liquid level sensor in the first raw ore bin can be arranged near the bottom of the first raw ore bin, while the liquid level sensor in the concentrate bin can be arranged near the upper part of the concentrate bin to ensure that When the sand pump stops working, the concentrate sand screened from the remaining raw ore sand in the first and second raw ore bins can be stored in the remaining space of the concentrate bin and the first raw ore bin. In addition, the volume ratio between the first raw ore bin, the second raw ore bin and the concentrate bin is 1:1:2 to 1:1:4, and the preferred value is 1:1:3, so as to minimize The last vacant space of the second raw ore warehouse improves the utilization efficiency of the hull space.

In order to improve the beneficiation efficiency of the magnetic separator, we can conduct a rough separation of the raw ore sand to remove impurities such as reefs and garbage before the magnetic separator is beneficiated. Specifically, we can set an inclined vibrating screen 7 above the magnetic separator. Of course, a vibrating motor needs to be connected to the vibrating screen, and the mesh size of the vibrating screen should ensure that the raw ore can pass through smoothly. . The raw ore sand mixed with impurities in the second raw ore bin can be extracted to the top of the higher side of the vibrating screen through a motor-driven slurry pump 8, and the vibrating screen vibrates under the drive of the vibrating motor. Smaller raw ore and seawater mixed in raw ore can pass through the vibrating screen directly, while impurities such as reefs and garbage with larger particles roll down along the vibrating screen. In order to collect raw ore sand and impurities respectively, we can set an opening upwards ore collecting funnel 81 below the vibrating screen, and the outlet at the bottom of the ore collecting funnel is just above the feed inlet of the magnetic separator. In this way, the raw ore sand and seawater that pass through the vibrating screen are collected by the ore collecting funnel and can directly enter the magnetic separator for synchronous beneficiation to improve the efficiency of the entire mining process. In addition, we need to arrange a sand collecting funnel 82 under the lower side of the vibrating screen, and the outlet of the sand collecting funnel is connected to the tailings sand collecting pipeline. In this way, the impurities rolling down along the vibrating screen can be collected by the sand collection funnel, and enter the tailings bin through the tailings sand collection pipe.

In order to facilitate the separation of impurities by the vibrating screen, we can also set several horizontally arranged thrust bars 71 on the vibrating screen from low to high intervals, so that the raw ore falling on the vibrating screen Impurities will not roll down into the sand collection funnel quickly after being blocked by the thrust bar, so that the residence time of impurities on the vibrating screen can be appropriately increased, so that the impurities adhering to the impurities in the raw ore Iron ore is fully separated from impurities due to vibration, reducing the waste of raw ore. Of course, the height of the thrust bar should be appropriate to prevent impurities from being completely blocked and unable to roll down.

In addition, in order to increase the separation accuracy of the magnetic separator during ore dressing, as shown in Figure 3, the magnetic separator of the present invention includes a rectangular ore dressing long groove 33, and a vertical dividing plate is arranged horizontally in the ore dressing long groove 34, so that the long beneficiation groove located on one side of the partition plate forms an upward-opening magnetic separator feed port 35, while the long beneficiation groove located on the other side of the divider plate forms a large, rectangular beneficiation area 36 Of course, a sand gap 341 needs to be left between the partition plate and the bottom surface of the mineral processing long groove, so that the raw ore sand entering the feed port of the magnetic separator can enter the mineral processing area through the sand gap at the bottom of the partition plate. In addition, we need to set up a rotary conveyor belt 37 arranged along the length direction in the mineral processing area of the long channel for mineral processing. The outlet 32 is located on the bottom surface of the long slot mineral processing area away from the side of the partition plate, and the tailings sand output port 31 is arranged between the concentrate sand output port and the partition plate on the bottom surface of the mineral processing area, between the tailings sand output port and the concentrate sand output port There should be a gap between the ports for accurate separation of the concentrate and tailings. A magnet 38 for absorbing high-grade iron ore in the raw ore sand is arranged on the side of the rotary conveyor belt close to the bottom of the beneficiation long tank. The magnet extends from the end close to the partition plate to the side close to the partition plate on the corresponding concentrate output port. In this way, the raw ore sand entrained with seawater entering the feed port of the magnetic separator smoothly enters the ore dressing area of the long beneficiation tank through the sand passing gap at the bottom of the partition plate, and contacts with the rotary conveyor belt. At this time, the rotating rotary conveyor belt on the one hand drives the raw ore to move toward the tailings output port and the concentrate output port, and at the same time uses the magnetic attraction force of its internal magnet to absorb the iron ore with a grade that meets the requirements in the raw ore to the rotary conveyor belt. conveyor belt surface. When the iron ore sand with lower grade in the raw ore sand reaches the tailings sand output port driven by the rotary conveyor belt, it will fall into the tailings sand output port under the action of gravity, thus becoming tailings sand, and adsorbed on the rotary conveyor belt with a higher grade. When the high iron ore reaches the output port of the concentrate, because there is no magnet inside the rotary conveyor belt, the iron ore loses its magnetic attraction and falls into the output port of the concentrate below, thus becoming the concentrate, so as to realize the fineness of the raw ore. select. It is understandable that we can appropriately increase the length of the beneficiation area so that the outlet of the tailings sand and the outlet of the concentrate sand can be separated as much as possible, thereby ensuring effective separation between the concentrate sand and the tailings sand. In addition, we can appropriately control the height of the sand passing gap of the dividing plate, so as to control the thickness of the raw ore sand moving on the bottom of the beneficiation area, so that there is a long period of full contact between the raw ore sand and the rotary conveyor belt, ensuring high-grade Complete adsorption of raw ore sand.

In order to facilitate the driving of the raw ore by the rotary conveyor belt, several rows of bosses 371 can be arranged at intervals on the surface of the carousel belt, and the two adjacent rows of bosses can be misplaced. In this way, on the one hand, the convex column is beneficial to the rotary conveyor belt to push the raw ore to move along the bottom surface of the long beneficiation groove; Attracted to the surface of the carousel, avoiding waste. Further, we can also set a water spray nozzle 39 facing the sand passing gap at the bottom of the ore dressing long groove located in the feed inlet of the magnetic separator away from the dividing plate. In this way, when the magnetic separator is working, the water nozzle can eject high-speed water flow, thereby assisting in pushing the raw ore in the feeding port of the magnetic separator into the beneficiation area.

The concentrated ore conveying device of the present invention comprises a screw conveyor 9 and a belt conveyor 90 connected thereto, as shown in Figure 4, wherein the screw conveyor includes a barrel 91, a rotating shaft with helical blades arranged in the barrel 92. One end of the rotating shaft is associated with the drive motor through a transmission mechanism. A material input port 93 is set at one end of the barrel close to the drive motor, and a material output port 94 is set at the other end. The input end of the belt conveyor is located below the material output port. The output end of the belt conveyor is located above the concentrate bin. When the screw conveyor is working, the drive motor drives the rotating shaft to rotate, and the spiral blades on the rotating shaft can push the concentrate to move forward. Since the screw conveyor has a squeezing effect when conveying the concentrate, it can squeeze out the concentrate. The water content is not only beneficial to the subsequent belt conveyor transportation, but also reduces the weight of the concentrate and improves the efficiency of the concentrate warehouse for storing the concentrate. Of course, we need to set corresponding water outlet holes on the barrel of the screw conveyor so that the water in the concentrate can be squeezed out from the water outlet holes. By controlling the diameter of the water outlet holes, it is possible to prevent the concentrate from being squeezed out out. At the same time, we can also make the pitch of the screw blade gradually decrease from the end of the material input port to the end of the material output port, so that the conveying speed of the screw conveyor also gradually decreases from the end of the material input port to the end of the material output port, so that The extrusion force on the concentrate is gradually increased from the end of the material input port to the end of the material output port, which is beneficial to the extrusion of water in the concentrate. The concentrated ore sent from the material output port of the screw conveyor is sent to the concentrate bin for storage through the belt conveyor.

In order to facilitate the flow of concentrated ore from the output port of the concentrated ore and avoid the blockage of the concentrated ore in the screw conveyor, we can coaxially set a support hole 921 on the rotating shaft of the screw conveyor away from the end of the drive motor, and on the circumferential surface of the rotating shaft A number of air injection holes 922 passing through the support hole are arranged on the top, and a support shaft 95 is fitted in the opening end of the support hole. A vent hole 951 is arranged on the support shaft. One end of the vent hole communicates with the support hole, and the other end communicates with the compressed air through a compressed air pipe. source connectivity. In this way, the compressed air can pass through the ventilation hole and the supporting hole and then be sprayed out from the jet hole. The compressed air jetted from the jet hole can loosen the compacted concentrate in the barrel, thereby avoiding the blockage of the concentrate in the barrel. In order to improve the shock effect of the compressed air, we can also connect a gap opening and closing valve 96 on the compressed air pipe, which includes a cylindrical valve body 961 with a rotatable valve core 962, the valve body One end is provided with a speed regulating motor 963 for driving the valve core, a radial air inlet 964 is arranged on the side wall of the valve body, and a radial air outlet is arranged on the side wall opposite to the air inlet 965, the air inlet and the air outlet are coaxially arranged and communicated with the compressed air pipe respectively. through the sides of the spool respectively. In this way, when the speed regulating motor drives the valve core to rotate so that one end of the compressed air passage is aligned with the air inlet, the other end is just aligned with the air outlet, thereby playing the role of connecting the air inlet and the air outlet respectively. The opening and closing valve is in the open state, and the compressed air can be ejected at high speed from the air injection hole of the rotating shaft through the opening and closing valve through the gap; The closing valve is in a closed state, and the compressed air is cut off. Repeatedly, the compressed air in the rotating shaft is ejected in pulses, which can effectively loosen the concentrated ore in the barrel.

Claims (10)

1. A marine mining engineering machinery, comprising a self-propelled hull and a sand pump, the hull is provided with two separated raw ore bins, a concentrate bin and a tailing sand bin, characterized in that the sand pump The sand outlet is connected to the first raw ore bin through pipelines, the first slurry pump is installed between the two raw ore bins, and the second slurry pump is installed between the concentrate bin and the first raw ore bin. It is equipped with a magnetic separator for ore dressing and a tailings pump for extracting tailings. The magnetic separator has a tailings output and a concentrate output. A concentrate is connected between the concentrate output and the concentrate bin. The conveying device, the tailings sand output port is connected to the tailings bin through the tailings sand collection pipe, the concentrate bin and the first raw ore bin are respectively equipped with liquid level sensors, and the sand suction port of the tailings pump is connected to the lower part of the tailings bin through the pipeline The sand outlet of the tailings pump is connected to one end of a tailings backfill pipeline suspended on the sea surface, and the other end of the tailings backfill pipeline extends to the seabed outside the mining area, and the raw ore sand in the second raw ore bin passes through the corresponding Pumped into the magnetic separator, the concentrate sand screened by the magnetic separator is output from the concentrate sand output port, and sent into the concentrate bin through the concentrate sand conveying device, and the tailing sand output from the sand outlet of the tailing sand pump passes through the tailing sand The ore backfill pipeline is sent back to the seabed outside the mining area; when the concentrate sand in the concentrate bin reaches the position of the liquid level sensor, the sand pump is controlled to stop working; when the raw ore sand in the first raw ore bin is pumped by the first slurry pump When all the slurry is pumped into the second raw ore bin, the liquid level sensor in the first raw ore bin sends out a signal, and the second slurry pump starts at this time, so that the concentrate sand in the concentrate bin is sent into the first raw ore bin. 2. A marine mining construction machine according to claim 1, characterized in that the volume ratio between the first raw ore bin and the second raw ore bin and the concentrate bin is 1:1:2 to 1:1 than 4. 3. A kind of marine mining engineering machinery according to claim 1, characterized in that, a vibrating screen is provided above the magnetic separator, the vibrating screen is arranged obliquely and is connected with a vibrating motor, and the vibrating screen is vibrated. There is an ore-collecting funnel with an opening facing upwards at the bottom. The outlet of the lower part of the ore-collecting funnel is located above the feed inlet of the magnetic separator. A sand-collecting funnel is provided under the lower side of the vibrating screen, and the outlet of the sand-collecting funnel is connected to the tailings sand. Collection pipes. 4. A marine mining construction machine according to claim 3, characterized in that a number of horizontally arranged thrust bars are arranged at intervals from low to high on the upper side of the vibrating screen. 5. A kind of marine mining engineering machinery according to claim 1, characterized in that, said magnetic separator comprises a mineral dressing long trough, and in the ore dressing long trough, a vertical dividing plate is horizontally provided, and the separating plate will The long mineral processing trough is divided into the feed inlet of the magnetic separator with an upward opening on one side and the mineral processing area on the other side. There is a sand gap between the partition plate and the bottom surface of the long mineral processing trough. The rotary conveyor belt arranged in the length direction, the concentrate sand output port is located at the bottom of the dressing area away from the end of the partition plate, the tailings sand output port is set between the concentrate sand output port and the partition plate on the bottom surface of the mineral processing area, the rotary conveyor belt A magnet is arranged on the side close to the bottom surface of the long ore dressing tank, and the magnets are extended from one end close to the partition plate to the side close to the partition plate on the corresponding concentrated ore output port. 6 . The marine mining construction machinery according to claim 5 , wherein the surface of the rotary conveyor belt is provided with several rows of bosses at intervals, and the two adjacent rows of bosses are staggered. 7 . 7. A marine mining construction machine according to claim 5, characterized in that, the long ore-dressing trough is provided with a water spray nozzle facing the sand passing gap at the bottom of the feeding port of the magnetic separator. 8. A kind of marine mining engineering machinery according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7, characterized in that, the concentrate sand conveying device comprises a screw conveyor and a belt conveyor, and the screw conveyor It includes a material barrel and a rotating shaft arranged in the material barrel. The rotating shaft is provided with a helical blade. One end of the rotating shaft is associated with the drive motor through a transmission mechanism. One end of the material barrel is provided with a material input port, and the other end is provided with a material output port. Belt The input end of the conveyor is located below the material output port, and the output end of the belt conveyor is located above the concentrate bin. The pitch of the spiral blade gradually decreases from the end of the material input port to the end of the material output port. Has a sink hole. 9. A kind of marine mining engineering machinery according to claim 8, characterized in that, the rotating shaft of the screw conveyor is coaxially provided with a supporting hole at the end far away from the drive motor, and a number of through holes are provided on the circumferential surface of the rotating shaft. The air jet hole of the support hole, the opening end of the support hole is fitted with a support shaft, the support shaft is provided with a vent hole, one end of the vent hole communicates with the support hole, and the other end communicates with the compressed air source through a compressed air pipe. 10. A kind of marine mining construction machinery according to claim 9, characterized in that a gap opening and closing valve is connected to the compressed air pipe, and the gap opening and closing valve includes a cylindrical valve body, which can be The rotating spool and the speed-regulating motor set at one end of the valve body to drive the spool, the side wall of the valve body is provided with an air inlet and an air outlet respectively connected to the compressed air pipe, and the valve core is provided with Compressed air channels for inlet and outlet.