Efficient dehydration system of physical mineral separation ceramic filter

Abstract

The utility model relates to the technical field of physical beneficiation, in particular to an efficient dehydration system of a physical beneficiation ceramic filter. The utility model discloses an efficient dehydration system of a physical mineral separation ceramic filter. The efficient dehydration system comprises a water collecting tank, a water pump and a cleaning tank, the water collecting tank is used for collecting filtrate of the plurality of ceramic filters; the water pump pumps water in the water collecting tank into the ceramic filter for flushing the filter plate; and the cleaning tank is used for soaking the filter plate. According to the efficient dehydration system of the physical mineral separation ceramic filter, the use amount of external clear water is reduced, filtrate adopts an internal circulation mode, inflow and outflow balance of flotation production water can be effectively maintained, and the occurrence rate of environmental accidents caused by water leakage is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of physical mineral processing, and in particular to a high-efficiency dehydration system of a physical mineral processing ceramic filter. Background Art

[0002] In the material beneficiation process, a ceramic filter is used to filter phosphate concentrate. The principle is: the ceramic filter is equipped with a rotor formed by several groups of ceramic filter plate discs. When the rotor is running, the filter plate is immersed in the slurry liquid level in the tank due to the effect of vacuum extraction, so that a layer of solid particles is formed on the surface of the filter plate. The liquid passes through the filter plate and is switched into the vacuum barrel by the distribution head; when the filter plate with the accumulation layer leaves the slurry liquid level to form a filter cake, the vacuum continues to dehydrate and further dry the filter cake. The rotor continues to rotate to the position where the scraper is installed to remove the filter cake. After the filter cake is removed, the filter plate operating position reaches the flushing position where the autocoupler switches to the opposite direction of the vacuum flow, forming a flushing effect from the inside of the filter plate to the outside to remove the particles blocked in the ceramic micropores; then it is re-immersed in the slurry to achieve a continuous and efficient filtering effect.

[0003] Therefore, the ceramic filter uses microporous ceramics as the filter medium, and utilizes the unique water-permeable and air-impermeable properties of microporous ceramics with a large number of narrow capillary effects, and achieves the purpose of solid-liquid separation under the negative pressure working state formed by a vacuum pump.

[0004] In the current physical mineral processing process, the primary water for external use is pumped from the mine sewage treatment station pool to the high-level water pool at the mineral processing site, and then retained in the pool to the filtration water system, and used as system water for the slurry pump, vacuum pump and filter plate backwash water, etc. The filtration water system has the disadvantages of low pressure and instability, which cannot fully meet the water pressure requirements of the pumping, and will cause the inflow and outflow of the entire flotation system to be unbalanced, thus affecting the normal production of the workshop.

[0005] Moreover, in the physical mineral processing process, due to the nature of the ore (containing some clay minerals), a small amount of fine particles will enter the micropores of the ceramic filter plate, causing the filter plate to be blocked. However, currently only a single nitric acid is used as the soaking liquid, and the effect of dissolving fine particles is not obvious; and it is difficult to wash away the clay minerals during the backwashing process, which will cause the filter plate to be blocked quickly and the ore to be thin.

[0006] To this end, the present application provides a physical mineral processing ceramic filter high-efficiency dehydration system. Utility Model Content

[0007] In order to overcome the shortcomings of existing process technology designs, the present application provides a physical mineral processing ceramic filter with high efficiency dehydration system, which reduces the amount of external clean water used. The filtrate adopts an internal circulation mode, which can effectively maintain the balance of flotation production water inlet and outlet, and reduce the incidence of environmental accidents caused by water leakage.

[0008] The technical solution adopted by this application to solve its technical problem is:

[0009] A high-efficiency dehydration system for a physical ore dressing ceramic filter, comprising a water collecting tank, a water pump and a cleaning tank;

[0010] The water collecting tank is used to collect the filtrate from several ceramic filters;

[0011] The water pump pumps the water in the water collection tank to the ceramic filter for washing the filter plate;

[0012] The cleaning tank is used for soaking the filter plate.

[0013] In some embodiments, a water pump is provided on the water outlet pipe of the water collecting tank; the water outlet pipe of the water collecting tank is connected to the water inlet pipe of the ceramic filter, and the water inlet pipe of the ceramic filter is used for flushing the filter plate.

[0014] Therefore, through the above technical solution, the water collecting tank collects the filtrate of several ceramic filters, and then the filtrate is pumped into the water inlet pipe of the ceramic filter by a water pump, and the filter plate is flushed through the water inlet pipe of the ceramic filter.

[0015] In some embodiments, the water outlet pipe of the ceramic filter is connected to the water inlet pipe of the water collecting tank.

[0016] In some embodiments, the water inlet pipe of the cleaning tank is connected to the water outlet pipe of the water collecting tank.

[0017] In some embodiments, an oxalic acid solution is provided in the cleaning tank.

[0018] Therefore, through the above technical solution, the cleaning tank can prepare a 3%-5% oxalic acid solution, and the filter plate can be placed in the solution until it is completely immersed for more than 24 hours for standby use. Before using it again, use a 30% nitric acid solution combined with ultrasonic backwashing for 1 hour to effectively improve the micropore blockage of the filter plate and improve the filtration quality. When parking for a long time, soak the filter plate in the nitric acid solution, and it is strictly forbidden to place the filter plate in dry air.

[0019] In some embodiments, a plurality of filter plates are disposed in the ceramic filter, and a scraper is disposed below the filter plates.

[0020] In some embodiments, a feeding belt is provided below the scraper.

[0021] In some embodiments, the discharge conveyor is connected to a concentrate bin.

[0022] In some embodiments, a return water tank is further included, wherein the feed pipe of the return water tank is connected to the water collecting tank, the liquid outlet pipe of the return water tank is connected to the water inlet pipe of the ceramic filter, and the water inlet pipe of the water collecting tank is connected to the water outlet pipe of the ceramic filter. The filtrate water of the ceramic filter can be used as cooling water and filter plate backwash water to stabilize the cooling water pressure and ensure the quality and pressure of the backwash water, thereby maintaining the overall water balance of the flotation process and improving production efficiency.

[0023] In some embodiments, the feed port of the ceramic filter is connected to a slurry tank, and the slurry tank is connected to a thickening tank.

[0024] The beneficial effects of this application are:

[0025] 1. The physical ore dressing ceramic filter high-efficiency dehydration system described in this application shortens the start-up and shutdown time to achieve filtering effect: the start-up time is shortened from more than 2 days to 1 day; the shutdown filtering time is extended from the original 1 day of shutdown when the filter cake becomes thinner to more than 2 days after shutdown to filter the thinning phenomenon of filter cake, which greatly increases the time for filtering qualified concentrate;

[0026] 2. The physical mineral processing ceramic filter high-efficiency dehydration system described in this application reduces the external clean water consumption, and the filtrate adopts an internal circulation mode, which can effectively maintain the inflow and outflow balance of flotation production water and reduce the incidence of environmental accidents caused by water leakage.

[0027] 3. The physical mineral processing ceramic filter high-efficiency dehydration system described in this application can prolong the service life of the filter plate and significantly increase the filtration volume per unit time through cleaning and soaking treatment of the filter plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present application is further described below in conjunction with the accompanying drawings and embodiments.

[0029] Figure 1 It is a structural schematic diagram of a high-efficiency dehydration system of a physical ore dressing ceramic filter described in the present application;

[0030] Figure 2 It is a structural schematic diagram of the connection relationship between the ceramic filter, water collection tank, and water pump described in this application;

[0031] Figure 3 It is a structural schematic diagram of the ceramic filter described in this application;

[0032] Among them: 11, ceramic filter; 1101, filter plate; 1102, scraper; 12, unloading belt; 13, concentrate bin; 14, slurry tank; 15, thickening tank; 21, water collecting tank; 22, water pump; 23, cleaning tank; 24, return water tank. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the concept, specific structure and technical effects of the present application in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of them. Based on the embodiments of the present application, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the present application. In addition, all the connection / connection relationships involved in the patent do not simply refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features created in this application can be combined interactively without conflicting with each other.

[0034] Regarding the ceramic filter water system and filter plate cleaning and soaking liquid, clean water from outside the factory was originally used as the system water source, resulting in low and unstable water system pressure, which could not fully meet the pump water pressure requirements, and caused the entire flotation system to be unbalanced in water inlet and outlet, thus affecting the normal production of the workshop. In addition, the filter plate was soaked in a single nitric acid solution, which had an ineffective effect in dissolving fine particles. The present application provides a high-efficiency dehydration system for physical mineral processing ceramic filters.

[0035] A physical mineral processing ceramic filter high-efficiency dehydration system, comprising a water collecting tank 21, a water pump 22 and a cleaning tank 23;

[0036] The water collecting tank 21 is used to collect the filtrate of several ceramic filters 11;

[0037] The water pump 22 pumps the water in the water collecting tank 21 to the ceramic filter 11 for washing the filter plate 1101;

[0038] The cleaning tank 23 is used for soaking the filter plate 1101 .

[0039] Specifically, several ceramic filters are used to filter the slurry from the slurry tank. The filtrate obtained after filtration by the ceramic filter is collected in a water collecting tank, and the filtrate is then transported to the ceramic filter by a water pump to rinse the filter plate. The filter plate that is not completely rinsed is taken out and placed in a cleaning tank for soaking, and the fine particles in the filter plate are further removed by soaking.

[0040] In some embodiments, a water pump 22 is provided on the water outlet pipe of the water collecting tank 21; the water collecting tank 21 is connected to the water outlet pipe of the ceramic filter 11, and the water outlet pipe of the water collecting tank 21 is connected to the water inlet pipe of the ceramic filter 11, and the water inlet pipe of the ceramic filter 11 is used to flush the filter plate 1101. The water outlet pipe of the ceramic filter 11 is connected to the water inlet pipe of the water collecting tank 21. Therefore, the water collecting tank is used to collect the filtrate of the ceramic filter, and the filtrate is clear and can be pumped to the filter plate for backwashing the filter plate, which ensures that the backwashing water pressure is continuous and stable, and can also improve the backwashing effect, so as to achieve the purpose of extending the ore hanging time and increasing the ore hanging.

[0041] In some embodiments, the water inlet pipe of the cleaning tank 23 is connected to the water outlet pipe of the water collecting tank 11. An oxalic acid solution is provided in the cleaning tank 23. Therefore, the filtrate water in the water collecting tank can be used to prepare the oxalic acid solution. Specifically, the cleaning tank can be used to prepare an oxalic acid solution with a concentration of 3%-5%. The filter plate is placed in the solution until it is completely immersed for more than 24 hours for standby use. Before it is used again, the filter plate is backwashed with a 30% concentration nitric acid solution combined with ultrasonic wave for 1 hour, which can effectively improve the micropore blockage of the filter plate and improve the filtration quality. When parking for a long time, the filter plate is soaked in a nitric acid solution. It is strictly forbidden to place the filter plate in dry air.

[0042] Due to the nature of the ore, which contains some clay and iron and aluminum minerals, a layer of sticky substance will adhere to the surface of the filter plate, which is difficult to wash off during the backwashing process, causing the filter plate to be blocked quickly and the ore to hang thinly. Oxalic acid can form water-soluble complexes with a variety of metals. For example, oxalic acid will react with aluminum to form aluminum oxalate. Oxalic acid will react with iron ions to produce a complex reaction. The filter plate is soaked in a single nitric acid solution, which is changed to soaking in oxalic acid solution + nitric acid solution. That is, the surface of the filter plate is first cleaned and soaked with oxalic acid, and the oxalic acid is fully reacted with the surface of the filter plate and the minerals containing iron and aluminum ions in the micropores. Then, the filter plate is soaked in nitric acid. At this time, the nitric acid reacts with other minerals in the micropores of the filter plate. Finally, it is combined with the circulating backwash water flushing to fundamentally solve the filter plate blockage problem and effectively improve the filtering effect and filtering quality of the filter plate.

[0043] In some embodiments, the ceramic filter 11 is provided with a plurality of filter plates 1101, and a scraper 1102 is provided below the filter plates 1101. A material discharge belt 12 is provided below the scraper 1102. The material discharge belt 12 is connected to a concentrate bin 13.

[0044] Specifically, the ceramic filter is equipped with a rotor formed by a plurality of groups of ceramic filter plates. During operation, the filter plates rotate and are immersed under the slurry liquid level in the tank due to the vacuum effect, so that a layer of solid particles is formed on the surface of the filter plates. The liquid (filtrate) passes through the filter plates and is switched from the distribution head to the vacuum barrel and then flows out through the outlet pipe of the ceramic filter 11. When the filter plates with the accumulated layer leave the slurry liquid level, a filter cake is formed. Due to the vacuum effect, the filter cake continues to be dehydrated and further dried. The rotor continues to rotate to the position where the scraper is installed to unload the filter cake, and the filter cake is transported to the concentrate bin through the unloading belt below.

[0045] In some embodiments, a return water pool 24 is further included, wherein the feed pipe of the return water pool 24 is connected to the water collecting tank 21, the liquid outlet pipe of the return water pool 24 is connected to the water inlet pipe of the ceramic filter 11, and the water collecting tank 21 is connected to the water outlet pipe of the ceramic filter 11. The filtrate from the water outlet pipe of the ceramic filter may contain some fine particles of impurities and cannot be directly used as cooling water for the ceramic filter, so a return water pool is added;

[0046] The return water tank receives the supernatant from the water collection tank. The supernatant is used as cooling water for the ceramic filter and backwash water for the filter plate. It can stabilize the cooling water pressure and ensure the quality and pressure of the backwash water, thereby maintaining the overall water balance of the flotation process and improving production efficiency.

[0047] In some embodiments, a feed port of the ceramic filter 11 is connected to a slurry tank 14 , and the slurry tank 14 is connected to a thickening tank 15 .

[0048] Specifically, the concentrate slurry with qualified indicators from the thickener goes through the slurry tank and is transported to the ceramic filter for filtration.

[0049] The operation process of a physical mineral processing ceramic filter high-efficiency dehydration system described in this application is as follows:

[0050] Slurry filtration stage: First, the slurry is pumped from the slurry tank to the ceramic filter; the ceramic filter has a built-in rotor formed by multiple groups of ceramic filter plate discs. During the operation of the rotor, the filter plate is immersed under the slurry liquid surface due to the vacuum effect. At this time, the solid particles in the slurry form an accumulation layer on the surface of the filter plate, and the liquid is sucked into the vacuum barrel through the micropores of the filter plate to achieve solid-liquid separation. As the rotor continues to rotate, the filter plate containing the accumulation layer leaves the slurry liquid surface to form a filter cake, which is further dehydrated under the vacuum effect until it reaches a dry state.

[0051] Filter cake unloading and cleaning stage: When the filter plate rotates to the position where the scraper is installed, the filter cake is unloaded and conveyed to the concentrate bin for storage through the unloading belt. Then, the filter plate moves to the flushing position, at which time the filtrate in the water collection tank flushes the filter plate and removes the debris on the filter plate

[0052] Filter plate soaking and reuse stage: In order to completely remove stubborn blockages on the filter plate, especially clay minerals, the filter plate needs to be taken out and soaked in a cleaning tank. The cleaning tank is equipped with a 3%-5% concentration of oxalic acid solution, and the filter plate needs to be completely soaked in it for more than 24 hours. Before reuse, it is necessary to backwash with a 30% concentration of nitric acid solution combined with ultrasound to further optimize the cleaning effect.

[0053] Filtrate recovery and reuse stage: The filtrate produced by the ceramic filter is collected in a water collection tank. These filtrates can be pumped back to the ceramic filter through a water pump to flush the filter plate, thereby realizing the internal recycling of the filtrate. In addition, the filtrate can also be introduced into the return water pool as cooling water or backwash water for the filter plate to further stabilize the water pressure and ensure the water balance of the flotation system.

[0054] The above is a specific description of the preferred implementation of the present application, but the invention of the present application is not limited to the described embodiments. Technical personnel familiar with the field can also make various equivalent modifications or substitutions without violating the spirit of the present application. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A physical mineral processing ceramic filter high efficiency dehydration system, characterized in that: It comprises a water collecting tank (21), a water pump (22) and a cleaning tank (23); The water collecting tank (21) is used to collect filtrates from a plurality of ceramic filters (11); The water pump (22) pumps water in the water collecting tank (21) into the ceramic filter (11) for flushing the filter plate (1101); The cleaning tank (23) is used for soaking the filter plate (1101).

2. The physical ore dressing ceramic filter high-efficiency dehydration system according to claim 1 is characterized in that: A water pump (22) is provided on the water outlet pipe of the water collecting box (21); the water outlet pipe of the water collecting box (21) is connected to the water inlet pipe of the ceramic filter (11), and the water inlet pipe of the ceramic filter (11) is used for flushing the filter plate (1101).

3. The physical ore dressing ceramic filter high-efficiency dehydration system according to claim 1 is characterized in that: The water outlet pipe of the ceramic filter (11) is connected to the water inlet pipe of the water collecting tank (21).

4. The physical ore dressing ceramic filter high-efficiency dehydration system according to claim 1 is characterized in that: The water inlet pipe of the cleaning tank (23) is connected to the water outlet pipe of the ceramic filter (11).

5. The physical ore dressing ceramic filter high-efficiency dehydration system according to claim 1 is characterized in that: An oxalic acid solution is provided in the cleaning tank (23).

6. The physical ore dressing ceramic filter high-efficiency dehydration system according to claim 1 is characterized in that: A plurality of filter plates (1101) are arranged in the ceramic filter (11), and a scraper (1102) is arranged below the filter plates (1101).

7. The physical ore dressing ceramic filter high-efficiency dehydration system according to claim 6 is characterized in that: A material unloading belt (12) is arranged below the scraper (1102).

8. The physical ore dressing ceramic filter high-efficiency dehydration system according to claim 7 is characterized in that: The unloading belt (12) is connected to the concentrate bin (13).

9. The physical ore dressing ceramic filter high-efficiency dehydration system according to claim 1 is characterized in that: It also comprises a water return pool (24), wherein the feed pipe of the water return pool (24) is connected to the water collecting tank (21), the liquid outlet pipe of the water return pool (24) is connected to the water inlet pipe of the ceramic filter (11), and the water collecting tank (21) is connected to the water outlet pipe of the ceramic filter (11).

10. The physical ore dressing ceramic filter high-efficiency dehydration system according to claim 1, characterized in that: The feed port of the ceramic filter (11) is connected to a slurry tank (14), and the slurry tank (14) is connected to a thickening tank (15).

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