Pretreatment device for recycling ore test waste acid

Abstract

The utility model relates to the technical field of ore separation waste acid treatment, and discloses an ore test waste acid recycling pretreatment device which comprises a treatment box, a separation assembly and a detection control module, the separation assembly comprises a first recovery mechanism and a second recovery mechanism, and the first recovery mechanism and the second recovery mechanism can respectively filter the waste acid liquid in the treatment box; the detection control module comprises a control unit and a pH sensor, the control unit is in control connection with the separation assembly, and when the pH value in the treatment box reaches a preset value, the first recovery mechanism and the second recovery mechanism respectively filter and recover the waste acid liquid in the treatment box. According to the utility model, the two groups of mutually independent recovery mechanisms are arranged, and different precipitates are respectively collected into different recovery mechanisms by utilizing different precipitation rates of different metal ions under different pH values, so that the resource recovery of lead and zinc can be realized in the pretreatment process of the lead-zinc ore beneficiation and smelting waste acid solution; the recovery efficiency of metal resources in the waste acid is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste acid treatment in ore dressing, in particular to a pretreatment device for recycling waste acid from ore testing. Background Art

[0002] In the process of lead-zinc ore dressing and smelting, a large amount of waste acid liquid is often generated, which mainly contains dissolved heavy metal ions (such as lead, zinc, iron, cadmium, arsenic, etc.), mainly lead and zinc elements; such waste acid has high acidity and strong toxicity. If directly discharged, it will seriously pollute the soil and water body and cause waste of resources; when environmentally treating waste acid, recovering valuable metals in the acid liquid can not only reduce the risk of environmental pollution but also reduce waste of resources.

[0003] However, the current waste acid treatment devices on the market usually adopt the neutralization method. Although a filter screen is provided inside, most of the designed filter screens are placed horizontally at the position of the water outlet pipe for use. This easily causes the filter residue after neutralization to stay and concentrate on the surface of the filter screen, unable to separate and recover different metal elements, and easily affecting the quality of subsequent waste acid neutralization products. Therefore, a pretreatment device for recycling waste acid from ore testing is proposed. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the disadvantages in the prior art that waste acid treatment devices usually use filter screens to collect and intercept the filter residue of waste acid treatment, resulting in concentrated filter residue, unable to separate and recover different metal elements, and low waste acid resource recovery efficiency, and to propose a pretreatment device for recycling waste acid from ore testing.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme: A pretreatment device for recycling waste acid from ore testing, comprising: a treatment tank;

[0006] A separation component, including a first recovery mechanism and a second recovery mechanism, the first recovery mechanism and the second recovery mechanism can respectively filter the waste acid liquid in the treatment tank, the first recovery mechanism includes a reflux tank and a recovery tank, and the recovery tank is movably installed in the reflux tank for recovering filter residue;

[0007] A detection and control module, including a control unit and a pH sensor, the control unit is connected to the separation component for control, and when the pH value in the treatment tank reaches a predetermined value, the first recovery mechanism and the second recovery mechanism respectively filter and recover the waste acid liquid in the treatment tank;

[0008] A circulation pipe, one end of the circulation pipe is installed at the bottom of the treatment tank, and the other end is connected to the tops of the first recovery mechanism and the second recovery mechanism, so that the waste acid liquid circulates between the treatment tank and the separation component.

[0009] As a further description of the above technical solution:

[0010] A guiding frame is arranged inside the reflux box, and the recycling box can be pulled and slid on the guiding frame;

[0011] One side of the reflux box is provided with a reflux port, and the reflux box is communicated with the inside of the treatment box through the reflux port.

[0012] As a further description of the above technical solution:

[0013] The recycling box is provided with filtering holes on both the bottom surface and the surface close to the reflux port.

[0014] As a further description of the above technical solution:

[0015] The waste acid recycling pretreatment device further includes a driving pump, the driving pump is fixedly installed on the treatment box, the input end of the driving pump is communicated with the inner bottom of the treatment box, one end of the circulation pipe is connected to the output end of the driving pump, and the other end of the circulation pipe is fixed on the top of the reflux box.

[0016] As a further description of the above technical solution:

[0017] The ore assay waste acid recycling pretreatment device further includes an adjusting assembly, and there are two groups of the adjusting assemblies, which are respectively used for adding acidic adjusting materials and alkaline adjusting materials into the treatment box.

[0018] As a further description of the above technical solution:

[0019] The adjusting assembly includes a storage tank for storing acidic adjusting materials or alkaline adjusting materials. A feeding driving part is fixedly installed on the storage tank, and a auger is arranged at the output end of the feeding driving part.

[0020] As a further description of the above technical solution:

[0021] A stirring structure is arranged on the treatment box, and the stirring structure includes a stirring driving part and a stirring part rotating on the treatment box. The stirring part is connected to the output end of the stirring driving part.

[0022] As a further description of the above technical solution:

[0023] The pH sensor is installed inside the treatment box for detecting the pH value of the liquid in the treatment box, and the pH sensor is electrically connected with the control unit.

[0024] As a further description of the above technical solution:

[0025] The first recycling mechanism and the second recycling mechanism have the same structure and are independently arranged;

[0026] The control unit is respectively connected to the first recovery mechanism and the second recovery mechanism in a controlled manner. When the pH value in the treatment tank reaches a predetermined value, the first recovery mechanism and the second recovery mechanism respectively drive the corresponding drive pumps to treat the waste acid.

[0027] The utility model has the following beneficial effects:

[0028] 1. In the utility model, a circulating flow is formed between the treatment tank and the separation component for the waste acid solution, so that the precipitate is filtered and recovered during the circulating flow. And through two sets of independent recovery mechanisms, due to the different precipitation rates of different metal ions at different pH values, different precipitates are respectively collected into different recovery mechanisms, which can realize the separation and recovery of lead and zinc resources during the pretreatment of the waste acid liquid in lead-zinc ore dressing, and improve the recovery efficiency of metal resources in the waste acid.

[0029] 2. The separation component filters the precipitate filter residue formed during the pretreatment process, and filters and recovers the precipitate during the circulation of the waste acid solution, so that the filter residue remains in the recovery tank for recovery, and the waste acid solution returns to the treatment tank, realizing the collection of the filter residue outside the acid liquid, facilitating the recovery of precipitates formed by different metals, and effectively ensuring the recovery utilization rate of resources;

[0030] 3. Two sets of independent recovery mechanisms can respectively recover the lead element precipitate and the zinc element precipitate, so that different metal elements are separated and recovered during the pretreatment process, which can simplify the subsequent recovery process and recovery cost. Description of the Drawings

[0031] Figure 1 is a perspective view of the pretreatment device for recycling waste acid in ore assay proposed by the utility model;

[0032] Figure 2 is a schematic internal structure diagram of the pretreatment device for recycling waste acid in ore assay proposed by the utility model;

[0033] Figure 3 is a schematic structural diagram of the first recovery mechanism of the pretreatment device for recycling waste acid in ore assay proposed by the utility model;

[0034] Figure 4 is a partial structural diagram of the first recovery mechanism;

[0035] Figure 5 is a schematic internal structure diagram of the adjustment component;

[0036] Figure 6 is a schematic structural diagram of the pretreatment device for recycling waste acid in ore assay proposed by the utility model.

[0037] Legend Explanation:

[0038] 1. Separation component; 2. First recovery mechanism; 3. Second recovery mechanism; 21. Return flow tank; 212. Guide frame; 213. Return port; 214. Chute; 22. Recovery tank; 222. Filter holes; 23. Driving pump; 24. Circulation pipe; 4. Adjustment component; 41. Storage tank; 42. Feeding driving part; 43. Auger; 51. Stirring part; 52. Stirring driving part; 6. Processing tank; 7. Control unit; 8. pH sensor; 9. Drain valve. Specific embodiments

[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0040] In order to solve the problems that the waste acid treatment device usually uses a filter screen to collect and intercept the filter residue of waste acid treatment, resulting in concentrated filter residue, inability to separate and recover different metal elements, and low waste acid resource recovery efficiency, an ore assay waste acid reuse pretreatment device is designed in the embodiments of the present application, including a processing tank 6, a separation component 1, a circulation pipe 24 and a detection and control module; the separation component 1 includes a first recovery mechanism 2 and a second recovery mechanism 3, and the first recovery mechanism 2 and the second recovery mechanism 3 can respectively filter the waste acid liquid in the processing tank 6. The first recovery mechanism 2 includes a return flow tank 21 and a recovery tank 22, and the recovery tank 22 is movably installed in the return flow tank 21 for recovering the filter residue; the detection and control module includes a control unit 7 and a pH sensor 8, and the control unit 7 is connected to the separation component 1 for control. When the pH value in the processing tank 6 reaches a predetermined value, the first recovery mechanism 2 and the second recovery mechanism 3 respectively filter and recover the waste acid liquid in the processing tank 6; one end of the circulation pipe 24 is installed at the bottom of the processing tank 6, and the other end is connected to the tops of the first recovery mechanism 2 and the second recovery mechanism 3, so that the waste acid liquid circulates between the processing tank 6 and the separation component 1.

[0041] In this way, during the process of treating the waste acid from ore assay, by utilizing the characteristics that different metal elements form precipitates in different pH environments, when the waste acid liquid in the processing tank 6 is at the corresponding pH value, it can be introduced into different recovery mechanisms, and the precipitates in the waste acid can be separately collected. It is possible to separate and recover the precipitates of lead elements and zinc elements during the pretreatment of waste acid, and effectively improve the resource recovery efficiency of waste acid reuse treatment.

[0042] Moreover, a circulating flow is formed between the waste acid solution in the treatment tank 6 and the separation assembly 1. The pH value of the waste acid in the treatment tank 6 is monitored by the detection and control module, so that the waste acid solution flows from different recovery mechanisms at different pH values, enabling the waste acid to flow in two flow paths: treatment tank 6 - circulation pipe 24 - first recovery mechanism 2 - treatment tank 6, or treatment tank 6 - circulation pipe 24 - second recovery mechanism 3 - treatment tank 6. This can separate and recover lead and zinc elements by precipitation, filter and recover the precipitate during the circulating flow process, filter them out from the waste acid liquid in the optimal precipitation environment of lead and zinc elements, effectively guarantee the precipitation rate of lead and zinc, and thus ensure the resource recovery utilization rate.

[0043] In addition, compared with the method of collecting filter residues by setting a filter screen at the position of the water outlet pipe in the traditional waste acid treatment device, in the embodiment of the present application, the waste acid liquid is pumped into different recovery mechanisms for filtration. The waste acid liquid enters the recovery tank 22 for filtration and then flows back to the treatment tank 6 through the reflux tank 21, leaving the filter residue in the recovery tank 22. This enables the filter residue to be collected outside the acid liquid, facilitating the collection and replacement of the filter residue for filtration.

[0044] The waste acid reuse pretreatment device in the embodiment of the present application can be applied to ore dressing, specifically, it can be applied to the treatment of waste acid in lead-zinc ore dressing, but is not limited to waste acid from ore testing or silver ore testing, etc.

[0045] Refer to Figure 1 、 Figure 3 、 Figure 4 The separation assembly 1 is used to filter and separate the waste acid liquid with adjusted pH value in the treatment tank 6. It includes a first recovery mechanism 2 and a second recovery mechanism 3. The first recovery mechanism 2 and the second recovery mechanism 3 have the same structure and are independently arranged. When different metal elements need to be recovered, one of the recovery mechanisms is started separately, so that the corresponding metal filter residues precipitate and are collected in different recovery mechanisms, thereby realizing the separation and recovery of metal elements during the waste acid treatment process.

[0046] The first recovery mechanism 2 refers to the mechanism for filtering and recovering the filter residue in the waste acid solution. It includes at least one recovery tank 22 for filtration; the recovery tank 22 is provided with filtration holes 222; when the waste acid solution enters the recovery tank 22, the liquid flows back to the treatment tank 6 through the filtration holes 222, and the filter residue is left in the recovery tank.

[0047] Refer to Figure 3 and Figure 4, in some embodiments, a guiding frame 212 is provided inside the reflux tank 21, and the recycling tank 22 can be pulled and slid on the guiding frame 212; a reflux port 213 is formed on one side of the reflux tank 21, and the reflux tank 21 is connected to the inside of the treatment tank 6 through the reflux port 213; the recycling tank 22 is provided with filtering holes 222 on both the bottom surface and the surface close to the reflux port 213; further included is a driving pump 23, which is fixedly installed on the treatment tank 6, the input end of the driving pump 23 is connected to the inner bottom of the treatment tank 6, one end of a circulation pipe 24 is connected to the output end of the driving pump 23, the other end of the circulation pipe 24 is fixed to the top of the reflux tank 21, and the outlet of the circulation pipe 24 faces the inside of the recycling tank 22.

[0048] The guiding frame 212 is used to carry the recycling tank 22, so that the recycling tank 22 can slide on the reflux tank 21. In one embodiment, specifically, a handle can be provided on the recycling tank 22 to facilitate the pulling and sliding of the recycling tank 22; the reflux tank 21 is provided with a reflux port 213 on the surface installed on the treatment tank 6, and the inside of the reflux tank 21 is connected to the inside of the treatment tank 6, and an inclined groove 214 is provided at the bottom of the reflux tank 21 to facilitate the liquid to flow back from the inside of the reflux tank 21 to the treatment tank 6; the recycling tank 22 is provided with filtering holes 222 on both the bottom surface and the surface close to the reflux port 213.

[0049] When adding sodium sulfide (commonly known as stench alkali) to the treatment tank 6, adjust the pH value of the solution in the treatment tank 6 to be between 2 and 2.5. At this time, lead ions form lead sulfide precipitate (PbS) with sulfide ions, and at this time, zinc ions hardly precipitate; start the first recycling mechanism 2 without starting the second recycling mechanism 3. The acid liquid in the treatment tank 6 is pumped into the recycling tank 22 through the driving pump 2, and after being filtered by the recycling tank 22, the lead-containing precipitate remains inside the recycling tank 22, and the acid liquid flows back to the inside of the treatment tank 6 after passing through the reflux tank 21, thereby filtering out lead elements from the waste acid liquid. The staff can recover the lead-containing precipitate by taking out the recycling tank 22, which is convenient for subsequent production of lead products; after the lead elements are recovered, add sodium hydroxide to the treatment tank 6, and when the pH value is between 7 and 9, zinc hydroxide precipitate is formed, and at this time, start the second recycling mechanism 3 without starting the first recycling mechanism 2, and leave the zinc-containing precipitate in the second recycling mechanism 3; so that the lead and zinc precipitates can be separately collected, which is convenient for subsequent recycling and utilization.

[0050] In one embodiment, specifically, a drain valve 9 is provided at the bottom of the treatment tank 6 for discharging the treated waste liquid.

[0051] In some embodiments, the ore assay waste acid reuse pretreatment device further includes an adjustment assembly 4. There are two sets of adjustment assemblies 4, which are respectively used to add acidic adjustment materials and alkaline adjustment materials into the treatment tank 6. The adjustment assembly 4 includes a storage tank 41 for storing acidic adjustment materials or alkaline adjustment materials. A feeding driving part 42 is fixedly installed on the storage tank 41, and a screw conveyor 43 is arranged at the output end of the feeding driving part 42. A stirring structure is arranged on the treatment tank 6, and the stirring structure includes a stirring driving part 52 and a stirring part 51 rotatably arranged on the treatment tank 6. The stirring part 51 is connected to the output end of the stirring driving part 52.

[0052] The feeding driving part 42 drives the screw conveyor 43 to rotate, adding the additives in the storage tank 41 into the treatment tank 6 to adjust the pH value of the waste liquid in the treatment tank 6. The stirring driving part 52 drives the stirring part 51 to rotate, enabling the additives to be quickly mixed in the treatment tank 6. At the same time, when precipitation forms, it can make the precipitate suspended, facilitating the separation assembly 1 to extract the precipitate.

[0053] Refer to Figure 1 and Figure 6 In some embodiments, a pH sensor 8 is installed inside the treatment tank 6 to detect the pH value of the liquid in the treatment tank 6. The pH sensor 8 is electrically connected to the control unit 7. The first recovery mechanism 2 and the second recovery mechanism 3 have the same structure and are independently arranged. The control unit 7 is respectively connected to the first recovery mechanism 2 and the second recovery mechanism 3 for control. When the pH value in the treatment tank 6 reaches a predetermined value, the first recovery mechanism 2 and the second recovery mechanism 3 respectively drive the corresponding driving pumps 23 to treat the waste acid.

[0054] The pH sensor 8 detects the pH value of the waste acid in the treatment tank 6 and transmits this information to the control unit 7. When the pH value in the treatment tank 6 reaches a predetermined value, the control unit 7 responds to the pH value of the pH sensor 8 and respectively starts the corresponding driving pumps 23.

[0055] To more clearly understand the working process of the ore assay waste acid reuse pretreatment device of the present application embodiment, refer to Figures 1 - 6 The following is described with a specific embodiment:

[0056] The waste acid liquid enters the treatment tank 6. The pH sensor 8 monitors the pH value of the liquid in the tank in real time and feeds back the data to the control unit 7. In the two storage tanks 41 of the adjustment assembly 4, acidic adjustment materials or alkaline adjustment materials are respectively stored. Sodium sulfide can be prepared for subsequent pH value adjustment to precipitate lead ions, and sodium hydroxide can be prepared to precipitate zinc ions.

[0057] The stirring driving part 52 drives the stirring part 51 to rotate, and the feeding driving part 42 drives the screw conveyor 43 to rotate, adding the materials in the storage tank 41 into the treatment tank 6.

[0058] First, sodium sulfide is added into the treatment tank 6 through the adjusting component 4. Under the action of the stirring member 51, sodium sulfide quickly mixes with the waste acid solution, and at this time, the pH value of the solution begins to change; the pH sensor 8 in the treatment tank 6 detects the pH value of the solution in real time and transmits the data to the control unit 7. When the pH value reaches 2 - 2.5, lead ions and sulfide ions form lead sulfide precipitate (PbS), and at this time, zinc ions hardly precipitate;

[0059] After the control unit 7 receives the signal that the pH value reaches the predetermined value, it responds and starts the drive pump 23 of the first recovery mechanism 2. The drive pump 23 pumps the waste acid solution at the bottom of the treatment tank 6 into the recovery tank 22 through the circulation pipe 24. The lead-containing precipitate remains in the recovery tank 22 after filtration, and the filtered acid solution flows back into the treatment tank 6 through the reflux tank 21. The staff can pull out the recovery tank 22 to recover the lead-containing precipitate for subsequent production of lead products;

[0060] Similarly, after the recovery of lead elements is completed, the first recovery mechanism 2 stops working, and the adjusting component 4 is started again to add sodium hydroxide into the treatment tank 6 to adjust the pH value to 7 - 9, so that zinc ions form zinc hydroxide precipitate. At this time, the control unit 7 starts the drive pump 23 of the second recovery mechanism 3, and the zinc-containing precipitate remains in the recovery tank of the second recovery mechanism 3, and the staff can recover the zinc-containing precipitate.

[0061] After that, according to the acidity and alkalinity of the waste liquid in the treatment tank 6, the corresponding neutralizing agent is added into the treatment tank 6 through the adjusting component 4, and the waste acid is neutralized and discharged from the drain valve 9.

[0062] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An ore assay waste acid reuse pretreatment device, characterized in that, Comprising: A processing tank (6); A separation component (1), including a first recycling mechanism (2) and a second recycling mechanism (3), the first recycling mechanism (2) and the second recycling mechanism (3) being capable of respectively filtering the waste acid liquid in the processing tank (6), the first recycling mechanism (2) including a reflux tank (21) and a recycling tank (22), the recycling tank (22) being movably installed in the reflux tank (21) for recycling filter residues; A detection and control module, including a control unit (7) and a pH sensor (8), the control unit (7) being controllably connected to the separation component (1), when the pH value in the processing tank (6) reaches a predetermined value, the first recycling mechanism (2) and the second recycling mechanism (3) respectively filter and recycle the waste acid liquid in the processing tank (6); A circulation pipe (24), one end of the circulation pipe (24) being installed at the bottom of the processing tank (6), and the other end being connected to the tops of the first recycling mechanism (2) and the second recycling mechanism (3), so that the waste acid liquid circulates between the processing tank (6) and the separation component (1).

2. The ore assay waste acid reuse pretreatment device according to claim 1, characterized in that: A guiding frame (212) is provided inside the reflux tank (21), and the recycling tank (22) can be pulled and slid on the guiding frame (212); One side of the reflux tank (21) is provided with a reflux port (213), and the reflux tank (21) is connected to the inside of the processing tank (6) through the reflux port (213).

3. The pretreatment device for recycling waste acid in ore analysis according to claim 2, characterized in that: The recycling tank (22) is provided with filter holes (222) on both the bottom surface and the surface close to the reflux port (213).

4. The pretreatment device for recycling waste acid from ore assay according to claim 3, wherein: The waste acid reuse pretreatment device further includes a driving pump (23), the driving pump (23) being fixedly installed on the processing tank (6), the input end of the driving pump (23) being connected to the inner bottom of the processing tank (6), one end of the circulation pipe (24) being connected to the output end of the driving pump (23), and the other end of the circulation pipe (24) being fixed to the top of the reflux tank (21).

5. The pretreatment device for recycling waste acid in ore analysis according to claim 1, wherein: The ore assay waste acid reuse pretreatment device further includes an adjustment component (4), there being two groups of the adjustment component (4), respectively used for adding acidic adjustment materials and alkaline adjustment materials into the processing tank (6).

6. The pretreatment device for recycling waste acid in ore analysis according to claim 5, wherein: The adjustment component (4) includes a storage tank (41), the storage tank (41) being used for storing acidic adjustment materials or alkaline adjustment materials, a feeding driving member (42) being fixedly installed on the storage tank (41), and a screw conveyor (43) being provided at the output end of the feeding driving member (42).

7. The pretreatment device for recycling waste acid in ore assay according to claim 1, characterized in that: A stirring structure is provided on the processing tank (6), the stirring structure including a stirring driving member (52) and a stirring member (51) rotating on the processing tank (6), the stirring member (51) being connected to the output end of the stirring driving member (52).

8. The ore assay waste acid reuse pretreatment device according to claim 1, wherein: The pH sensor (8) is installed inside the processing tank (6) for detecting the pH value of the liquid in the processing tank (6), and the pH sensor (8) is electrically connected to the control unit (7).

9. The ore assay waste acid reuse pretreatment device according to claim 4, wherein: The first recovery mechanism (2) and the second recovery mechanism (3) have the same structure and are independently arranged; The control unit (7) is respectively connected to the first recovery mechanism (2) and the second recovery mechanism (3) for control. When the pH value in the treatment tank (6) reaches a predetermined value, the first recovery mechanism (2) and the second recovery mechanism (3) respectively drive the corresponding drive pumps (23) to treat the waste acid.

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