Evaluation device for acid production effect of waste rock

Abstract

The utility model belongs to the technical field of environmental pollution evaluation, and particularly relates to a waste rock acid production effect evaluation device. Comprising a reaction shell, an acid production reactor, a metering pump and a circulating water tank, the circulating water tank is arranged at the bottom of the reaction shell, first supporting legs are arranged at the four corners of the bottom of the circulating water tank respectively, and a sampling emptying valve is arranged at a water outlet in the bottom of the circulating water tank; the acid production reactor and the metering pump are respectively fixed on two sides in the reaction shell, and a baffle plate is arranged in the reaction shell between the acid production reactor and the metering pump; a liquid inlet of the metering pump is communicated with the circulating water tank, a liquid outlet of the metering pump is communicated with the acid production reactor through a pipeline and a spray head, and a filter screen is arranged at the bottom of the acid production reactor; the device is convenient to carry, convenient to sample, fill waste rocks and the like, favorable for evaluating the acid production effect of the waste rocks and high in result accuracy.

Description

Technical Field

[0001] The utility model belongs to the technical field of environmental pollution assessment, and particularly relates to an evaluation device for the acid production effect of waste rock. Background Art

[0002] At present, a large amount of waste rock is inevitably generated during the process of mine development. Especially for gold mines, the waste rock production rate can sometimes reach nearly 100%. The heavy metal elements in the waste rock are released under the action of weathering, leaching, etc., which will affect the quality of the water and soil environment around the mining area. Therefore, it is urgent to evaluate the acid production effect of waste rock. At present, the research on the acid production law of waste rock and the behavior of releasing heavy metal ions is to study the influence of factors such as the pH value of the leaching solution, the particle size of the waste rock, and the leaching intensity (the flow rate of the leaching solution) on acid production and the release of heavy metal ions through dynamic leaching tests, and obtain the law of sulfate generation and heavy metal release, and then evaluate the acid production effect of waste rock. However, there is currently no systematic device that can be used to evaluate the acid production effect of waste rock, so the current evaluation of the acid production effect of waste rock is time-consuming and laborious. Summary of the Invention

[0003] In order to solve the above problems, the utility model provides an evaluation device for the acid production effect of waste rock, which is convenient to carry, has convenient operations such as sampling and waste rock filling, is beneficial to the evaluation of the acid production effect of waste rock, and has a high result accuracy rate.

[0004] An evaluation device for the acid production effect of waste rock includes a reaction housing 1, an acid production reactor 2, a metering pump 3, and a circulation water tank 12. Among them, a circulation water tank 12 is provided at the bottom of the reaction housing 1, and first legs 13 are respectively provided at the four corners of its bottom. A sampling drain valve 8 is provided at the water outlet at the bottom of the circulation water tank 12; the acid production reactor 2 and the metering pump 3 are respectively fixed on both sides inside the reaction housing 1, and a baffle 14 is provided inside the reaction housing 1 between the acid production reactor 2 and the metering pump 3; the inlet of the metering pump 3 is communicated with the circulation water tank 12, the outlet of the metering pump 3 is communicated with the acid production reactor 2 through a pipeline 4 and a spray head 7, and a filter screen 17 is provided at the bottom of the acid production reactor 2.

[0005] A first valve 5 and a second valve 6 are successively provided on the pipeline 4 between the metering pump 3 and the spray head 7, and a plurality of spray heads 7 communicated with it are provided on the pipeline 4 between the first valve 5 and the second valve 6, so that the spray head 7 is located at the top opening of the acid production reactor 2; a pH meter is provided on the circulation water tank 12.

[0006] A grille 15 is provided at the bottom of the reaction housing 1 between the reaction housing 1 and the circulation water tank 12. The acid production reactor 2 and the metering pump 3 are both placed on the grille 15, and the pipeline at the inlet of the metering pump 3 passes through the grille 15 and extends into the circulation water tank 12.

[0007] The pipeline 4 is fixed on the inner wall of the reaction housing 1 through a bracket.

[0008] The baffle 14 is hermetically connected inside the reaction housing 1.

[0009] The acid-producing reactor 2 is a cylindrical body with openings at both the top and bottom. The filter screen 17 at its bottom is fixed to the bottom opening of the acid-producing reactor 2 through two upper and lower sealing flanges 16, and a handle 19 is provided on the outer side wall of the acid-producing reactor 2.

[0010] The bottom of the acid-producing reactor 2 is supported inside the reaction housing 1 by the second leg 18.

[0011] On both side walls of the reaction housing 1, a first operation side door 9 and a second operation side door 10 are respectively provided. The top is an upper cover 11, the bottom is open, and a circulation water tank 12 is connected to the opening. A grille 15 is provided between the top of the circulation water tank 12 and the reaction housing 1.

[0012] The bottom of the reaction housing 1 is open, and a grille 15 is fixed to the opening.

[0013] The second operation side door 10 is provided on the side wall of the reaction housing 1 close to the acid-producing reactor 2, and the first operation side door 9 is provided on the side wall of the reaction housing 1 close to the metering pump 3.

[0014] A handle 19 is provided on the side wall of the acid-producing reactor 2.

[0015] Advantages of the present utility model:

[0016] The present utility model has been successfully applied to the acid production evaluation work of waste rock in a certain mine in the gold industry. The entire system has a small floor area, is easy to carry, and operations such as sampling and waste rock filling are convenient. The design of the side doors and the top cover facilitates maintenance and replacement of parts. The solid cone nozzle of the present utility model evenly disperses the circulating spray liquid, and the acid production operation is stable, which is conducive to the evaluation of the acid production effect of waste rock, and the result accuracy is high.

[0017] The present utility model adopts simple process technologies, strengthens the anti-corrosion and acid resistance of the equipment, has a low system price, a small floor area, is easy to operate and transport, is convenient for maintenance, and has a good acid production effect.

[0018] The present utility model has obvious economic, social and environmental benefits, and has a good prospect of popularization and application. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings to be used in the description of the embodiments of the present utility model. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the embodiments of the present utility model and these drawings.

[0020] Figure 1 This is a schematic structural diagram of the present utility model.

[0021] Among them: reaction shell 1, acid-producing reactor 2, metering pump 3, pipeline 4, first valve 5, second valve 6, spray head 7, sampling and emptying valve 8, first operation side door 9, second operation side door 10, upper cover 11, circulation water tank 12, first support leg 13, baffle 14, grille 15, sealing flange 16, filter screen 17, second support leg 18, handle 19, waste rock 20. Specific embodiments

[0022] The present utility model will be further described in detail below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the convenience of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0023] Embodiment 1

[0024] An evaluation device for the acid production effect of waste rock includes a reaction shell 1, an acid-producing reactor 2, a metering pump 3 and a circulation water tank 12. Among them, a circulation water tank 12 is provided at the bottom of the reaction shell 1, and first support legs 13 are respectively provided at the four corners of its bottom. A sampling and emptying valve 8 is provided at the water outlet at the bottom of the circulation water tank 12; the acid-producing reactor 2 and the metering pump 3 are respectively fixed on both sides inside the reaction shell 1, and a baffle 14 is provided inside the reaction shell 1 between the acid-producing reactor 2 and the metering pump 3; the inlet of the metering pump 3 is communicated with the circulation water tank 12 through a pipeline, and the outlet of the metering pump 3 is communicated with the acid-producing reactor 2 through a pipeline 4 and a spray head 7. A filter screen 17 is provided at the bottom of the acid-producing reactor 2.

[0025] A first valve 5 and a second valve 6 are successively provided on the pipeline 4 between the metering pump 3 and the spray head 7, and a plurality of spray heads 7 communicated therewith are provided on the pipeline 4 between the first valve 5 and the second valve 6, so that the spray heads 7 are located at the top opening of the acid-producing reactor 2; a pH meter is provided in the circulation water tank 12.

[0026] A grille 15 is provided at the bottom of the reaction shell 1 between the reaction shell 1 and the circulation water tank 12. The acid-producing reactor 2 and the metering pump 3 are both placed on the grille 15, and the pipeline at the inlet of the metering pump 3 passes through the grille 15 and extends into the circulation water tank 12.

[0027] The pipeline 4 is fixed on the inner wall of the reaction shell 1 through a bracket.

[0028] The baffle 14 is sealingly connected inside the reaction shell 1.

[0029] The acid-producing reactor 2 is a cylinder with openings at both the top and bottom. The filter screen 17 at its bottom is fixed to the bottom opening of the acid-producing reactor 2 through two upper and lower sealing flanges 16, and a handle 19 is provided on the outer side wall of the acid-producing reactor 2.

[0030] The bottom of the acid-producing reactor 2 is supported in the reaction housing 1 by the second leg 18.

[0031] On both side walls of the reaction housing 1, a first operation side door 9 and a second operation side door 10 are respectively provided. The top is an upper cover 11, the bottom is open, and a circulation water tank 12 is connected to the opening. A grille 15 is provided between the top of the circulation water tank 12 and the reaction housing 1.

[0032] The bottom of the reaction housing 1 is open, and a grille 15 is fixed to the opening.

[0033] The second operation side door 10 is provided on the side wall of the reaction housing 1 close to the acid-producing reactor 2, and the first operation side door 9 is provided on the side wall of the reaction housing 1 close to the metering pump 3.

[0034] A handle 19 is provided on the side wall of the acid-producing reactor 2.

[0035] During use, acidic water with the required pH value is added to the circulation water tank 12, waste rock 20 is placed into the acid-producing reactor 2, the first valve 5 is opened, the second valve 6 is closed, the metering pump 3 is started, and the metering pump 3 pumps the acidic water in the circulation water tank 12 into the spray head 7 through the pipeline 4. The acid liquid sprayed from the spray head 7 is sprayed on the waste rock 20 in the acid-producing reactor 2. The acid liquid flowing down after spraying is filtered by the filter screen 17 and the grille 15 and then flows into the circulation water tank 12 for recycling. This is repeated until when the pH value of the liquid phase in the circulation water tank 12 is detected by the pH meter, and the difference between every two values in the continuously monitored values for three consecutive days is lower than 0.02, the acid production ends, the metering pump 3 is stopped, indicating that the waste rock 20 no longer produces acid at this time, the test stops, the sampling drain valve 8 is opened to drain the liquid in the circulation water tank 12, and the acid production capacity of the waste rock 20 is analyzed according to the detected pH information and acid liquid information.

[0036] Example 2

[0037] An acid production effect evaluation system for waste rock has been successfully applied to the evaluation of acid production from waste rock in a certain mine in the gold industry. An acid production effect evaluation system for waste rock includes a reaction housing 1, an acid production reactor 2, a metering pump 3, etc. Among them, the reaction housing 1 contains a pipeline 4, a first valve 5, a second valve 6, a spray head 7, a sampling and drainage valve 8, a first operation side door 9, a second operation side door 10, an upper cover 11, a circulation water tank 12, a first support leg 13, a baffle 14, a grille 15; the acid production reactor 2 contains a honeycomb flange 16, a filter screen 17, a second support leg 18, a handle 19. The size of the reaction housing 1 is: length 800 mm × width 400 mm × height 1300 mm. The size of the acid production reactor 2 is: inner diameter 200 mm × height 400 mm. The size of the circulation water tank 12 is: length 800 mm × width 400 mm. The circulation water tank 12 is divided into a straight section and a conical bottom. The height of the straight section is 200 mm, and the height of the conical bottom is 200 mm.

[0038] The reaction housing 1 provides a container and a platform for evaluating the acid production effect, realizes the circulating spraying of the generated acidic water, and can also conduct sampling and analysis at the same time. The main body of the reaction housing 1 is made of stainless steel 304 angle steel welded to form the main framework. The main body material of the metering pump 3 is made of polytetrafluoroethylene and stainless steel 304, and the others are all made of stainless steel 304 material. When the main framework needs to be connected to other structural parts, the corresponding welding electrodes are used for welding. In the reaction housing 1, the pipeline 4 realizes the circulating flow of the generated acidic water. A filter screen is installed at the front end of the pipeline 4 to prevent impurities from entering the spray head 7. The spray head 7 adopts a solid cone spray head to facilitate uniform spraying effect. The inner diameter of the pipeline 4 is DN15 mm, and the spray head 7 is matched with it. In the reaction housing 1, the first valve 5 facilitates the cleaning and replacement of the pipeline and the spray head. The second valve 6 is convenient for sewage discharge and cleaning. The sampling and drainage valve 8 is convenient for sampling. When sampling, a certain amount of liquid is first taken, and then it returns to the circulation water tank 12 from the upper part, and then sampling is carried out again. The sampling and drainage valve 8 is provided with a double valve to facilitate the maintenance of valve failures. In the reaction housing 1, the first operation side door 9 is arranged on one side of the metering pump 3, which is convenient for operating, replacing, and maintaining the metering pump 3. The second operation side door 10 is arranged on one side of the acid production reactor 2, which is convenient for operating, replacing, and maintaining the acid production reactor 2. The upper cover 11 can be opened as a whole, which is convenient for operating the pipeline, spray head, etc. in the reaction housing 1, the acid production reactor 2, and the metering pump 3. In the reaction housing 1, the circulation water tank 12 provides a buffer space for circulating spraying and sampling. The first support leg 13 provides stable support for the whole system. The bottom of the circulation water tank 12 adopts a conical bottom structure, which is convenient for emptying and cleaning. In the reaction housing 1, the baffle 14 is located between the acid production reactor 2 and the metering pump 3, which prevents mutual influence when both of them leak, and also ensures electrical safety. In the reaction housing 1, the grille 15 is located below the acid production reactor 2 and the metering pump 3. The function of the grille is to support the acid production reactor 2 and the metering pump 3, and at the same time ensure that the liquid can smoothly enter the circulation water tank 12.

[0039] In the acid-producing reactor 2, the sealing flange 16 consists of two upper and lower pieces, which are fastened with screws and leak-proofed with gaskets. The middle sandwich of the sealing flange is a filter screen 17, whose function is to prevent waste stones from entering the circulating water tank 12. In the acid-producing reactor 2, the second leg 18 provides support for the acid-producing reactor 2, and at the same time provides a certain space for the sealing flange 16 and the grille 15, facilitating the acidic water generated to enter the circulating water tank 12. In the acid-producing reactor 2, the handle 19 facilitates operations such as the transfer, maintenance, and waste stone replacement of the acid-producing reactor 2.

[0040] The metering pump 3 quantitatively circulates and transports the liquid to spray the waste stones 20 in a cycle. The flow rate of the metering pump 3 can be adjusted, and the flow rate of the metering pump 3 needs to meet the requirement that the nozzle 7 can spray a solid cone spray. Otherwise, the flow rate should be adjusted or the model of the nozzle 7 should be replaced.

[0041] Example 2

[0042] A waste stone acid-producing test device includes a reaction housing 1, an acid-producing reactor 2, a metering pump 3, etc. Among them, the reaction housing 1 includes a pipeline 4, a first valve 5, a second valve 6, a nozzle 7, a sampling and evacuation valve 8, a first operation side door 9, a second operation side door 10, an upper cover 11, a circulating water tank 12, a first leg 13, a baffle 14, a grille 15; the acid-producing reactor 2 includes a sealing flange 16, a filter screen 17, a second leg 18, a handle 19; in addition, a pH meter is also provided.

[0043] The function of the reaction housing 1 is: to provide a container and a platform for the acid-producing test, to realize the circulating spraying of the generated acidic water, and at the same time, sampling and analysis can be carried out. The whole of the reaction housing 1 is made of acid-resistant and corrosion-resistant material structural parts such as stainless steel 304 (such as stainless steel 304 angle steel, channel steel, etc.) to make the main body skeleton. When the main body skeleton is connected to other structural parts (such as the baffle 14, etc.), the corresponding welding rod welding method is adopted.

[0044] In the reaction housing 1, the pipeline 4 realizes the circulating flow of the generated acidic water. A filter screen is installed at the front end of the pipeline 4 to prevent impurities from entering the nozzle 7. The nozzle 7 adopts a solid cone nozzle to facilitate uniform spraying effect. Both the pipeline 4 and the nozzle 7 are made of acid-resistant and corrosion-resistant materials such as stainless steel 304, and the inner diameters of the pipeline 4 and the nozzle 7 should be large enough to prevent internal blockage.

[0045] In the reaction housing 1, the first valve 5 facilitates the cleaning and replacement of the pipeline and the nozzle, the second valve 6 is convenient for sewage discharge and cleaning, and the sampling and evacuation valve 8 is convenient for sampling. When sampling, a certain amount of liquid is first collected, then returned to the circulating water tank 12 from the upper part, and then sampling is carried out. The first valve 5, the second valve 6, and the sampling and evacuation valve 8 are all made of acid-resistant and corrosion-resistant materials such as stainless steel 304. The sampling and evacuation valve 8 should be provided with a double valve to facilitate the maintenance of valve failures.

[0046] In the reaction housing 1, the first operation side door 9 is arranged on the side of the metering pump 3, facilitating the operation, replacement, and maintenance of the metering pump 3. The second operation side door 10 is arranged on the side of the acid-producing reactor 2, facilitating the operation, replacement, and maintenance of the acid-producing reactor 2. The upper cover 11 can be opened as a whole, facilitating the operation of pipelines, spray heads, etc. in the reaction housing 1, the acid-producing reactor 2, and the metering pump 3. The first operation side door 9, the second operation side door 10, the upper cover 11, etc. are all made of acid-resistant and corrosion-resistant materials such as stainless steel 304.

[0047] In the reaction housing 1, the circulation water tank 12 provides a buffer space for circulating spraying and sampling, and the first leg 13 provides stable support for the entire system. The circulation water tank 12 is made of acid-resistant and corrosion-resistant materials such as stainless steel 304. When the circulation water tank 12 is operating normally, a part of the solvent stores acidic water, and the other part is empty. The empty volume is larger than the volume of the acid-producing reactor 2 to ensure that there is no overflow of acidic water in this system. The bottom of the circulation water tank 12 adopts a conical bottom structure, which is convenient for emptying and cleaning.

[0048] In the reaction housing 1, the baffle 14 is located between the acid-producing reactor 2 and the metering pump 3, preventing mutual influence when both leak and ensuring electrical safety. The baffle 14 is made of acid-resistant and corrosion-resistant materials such as stainless steel 304.

[0049] In the reaction housing 1, the grille 15 is located below the acid-producing reactor 2 and the metering pump 3. The function of the grille is to support the acid-producing reactor 2 and the metering pump 3, and at the same time ensure that the liquid can smoothly enter the circulation water tank 12. The grille 15 is made of acid-resistant and corrosion-resistant materials such as stainless steel 304.

[0050] The function of the acid-producing reactor 2 is to produce acid from waste rock. The acid-producing reactor 2 is made of acid-resistant and corrosion-resistant materials such as stainless steel 304.

[0051] In the acid-producing reactor 2, the sealing flange 16 consists of two upper and lower pieces, which are fastened with screws and leak-proof with gaskets. The middle sandwich of the sealing flange is a filter screen 17, whose function is to prevent waste rock 20 from entering the circulation water tank 12. The sealing flange 16, the filter screen 17, etc. are all made of acid-resistant and corrosion-resistant materials such as stainless steel 304.

[0052] In the acid-producing reactor 2, the second leg 18 provides support for the acid-producing reactor 2, and at the same time provides a certain space for the sealing flange 16 and the grille 15, facilitating the acidic water produced to enter the circulation water tank 12. The second leg 18 is made of acid-resistant and corrosion-resistant materials such as stainless steel 304.

[0053] In the acid-producing reactor 2, the handle 19 facilitates operations such as the transfer, maintenance, and waste rock replacement of the acid-producing reactor 2. The handle 19 is made of acid-resistant and corrosion-resistant materials such as stainless steel 304.

[0054] The metering pump 3 quantitatively circulates and conveys liquid, and circularly sprays the waste rock 20. The flow rate of the metering pump 3 can be adjusted, and the flow rate of the metering pump 3 needs to meet the requirement that the nozzle 7 can spray a solid cone spray. Otherwise, the flow rate should be adjusted or the model of the nozzle 7 should be replaced. The main body of the metering pump 3 is made of acid-resistant and corrosion-resistant materials such as polytetrafluoroethylene.

[0055] The pH meter is used to continuously and dynamically monitor the pH value of the liquid phase in the circulation water tank 12, and the monitoring range is between 0 and 14. In the later stage of the acid production process, the pH value of the liquid phase in the circulation water tank 12 will decrease. When the pH value of the liquid phase in the circulation water tank 12 is continuously monitored for three days, and the difference between each two values is less than 0.02, the acid production ends and the metering pump 3 is stopped.

[0056] Example 3

[0057] A waste rock acid production test device has been successfully applied to the waste rock acid production test work of a certain mine in the gold industry. A waste rock acid production test device includes a reaction shell 1, an acid production reactor 2, a metering pump 3 and other parts. Among them, the reaction shell 1 includes a pipeline 4, a first valve 5, a second valve 6, a nozzle 7, a sampling and evacuation valve 8, a first operation side door 9, a second operation side door 10, an upper cover 11, a circulation water tank 12, a first support leg 13, a baffle 14, a grille 15; the acid production reactor 2 includes a sealing flange 16, a filter screen 17, a second support leg 18, a handle 19. The size of the reaction shell 1 is: length 800mm × width 400mm × height 1300mm. The size of the acid production reactor 2 is: inner diameter 200mm × height 400mm. The size of the circulation water tank 12 is: length 800mm × width 400mm. The circulation water tank 12 is divided into a straight section and a conical bottom. The height of the straight section is 200mm, and the height of the conical bottom is 200mm. In addition, a pH meter is also provided.

[0058] The reaction housing 1 provides a container and a platform for the acid production test, enabling the recycled spraying of the generated acidic water and allowing for sampling and analysis at the same time. The overall reaction housing 1 is fabricated with a main framework welded from stainless steel 304 angle steel. The main body of the metering pump 3 is made of polytetrafluoroethylene, the pump body is made of stainless steel 304, and the rest are all made of stainless steel 304. When the main framework needs to be connected to other structural components, corresponding welding electrodes are used for welding. In the reaction housing 1, the pipeline 4 enables the recycled flow of the generated acidic water. A filter screen is installed at the front end of the pipeline 4 to prevent impurities from entering the nozzle 7. The nozzle 7 uses a solid cone nozzle to facilitate uniform spraying. The inner diameter of the pipeline 4 is DN15 mm, and the nozzle 7 is matched with it. In the reaction housing 1, the first valve 5 facilitates the cleaning and replacement of the pipeline and the nozzle. The second valve 6 is convenient for sewage discharge and cleaning. The sampling drain valve 8 is convenient for sampling. When sampling, a certain amount of liquid is first collected, then returned to the circulation water tank 12 from the upper part, and then sampling is carried out. The sampling drain valve 8 is provided with a double valve to facilitate the maintenance of valve failures. In the reaction housing 1, the first operation side door 9 is set on one side of the metering pump 3, which is convenient for operating, replacing, and maintaining the metering pump 3. The second operation side door 10 is set on one side of the acid production reactor 2, which is convenient for operating, replacing, and maintaining the acid production reactor 2. The upper cover 11 can be opened as a whole, which is convenient for operating the pipeline, nozzle, etc. in the reaction housing 1, the acid production reactor 2, and the metering pump 3. In the reaction housing 1, the circulation water tank 12 provides a buffer space for the recycled spraying and sampling. The first leg 13 provides stable support for the entire system. The bottom of the circulation water tank 12 adopts a conical bottom structure to facilitate drainage and cleaning. In the reaction housing 1, the baffle 14 is located between the acid production reactor 2 and the metering pump 3, preventing mutual influence when both leak and ensuring electrical safety at the same time. In the reaction housing 1, the grille 15 is located below the acid production reactor 2 and the metering pump 3. The function of the grille is to support the acid production reactor 2 and the metering pump 3, and at the same time ensure that the liquid can smoothly enter the circulation water tank 12.

[0059] In the acid production reactor 2, the sealing flange 16 consists of two upper and lower pieces, which are fastened with screws and sealed with gaskets to prevent leakage. The middle sandwich of the sealing flange is a filter screen 17, whose function is to prevent the waste rock 20 from entering the circulation water tank 12. In the acid production reactor 2, the second leg 18 provides support for the acid production reactor 2 and at the same time provides a certain space for the sealing flange 16 and the grille 15, facilitating the generated acidic water to enter the circulation water tank 12. In the acid production reactor 2, the handle 19 facilitates operations such as the transfer, maintenance, and waste rock replacement of the acid production reactor 2.

[0060] The metering pump 3 quantitatively circulates and transports the liquid to spray the waste rock 20 in a recycled manner. The flow rate of the metering pump 3 can be adjusted, and the flow rate of the metering pump 3 needs to ensure that the nozzle 7 can spray a solid cone spray. Otherwise, the flow rate should be adjusted or the model of the nozzle 7 should be replaced.

[0061] A pH meter, which functions to continuously and dynamically monitor the pH value of the liquid phase in the circulation water tank 12, and the monitoring range is between 0 and 14. In the later stage of the acid production process, the pH value of the liquid phase in the circulation water tank 12 will decrease. When the pH value of the liquid phase in the circulation water tank 12 is continuously monitored for three days, and the difference between every two monitored values is lower than 0.02, the acid production ends and the metering pump 3 is stopped.

[0062] Example 4

[0063] Same as Example 3, the difference is that: the size of the reaction shell 1 is: length 700mm × width 400mm × height 1500mm; the size of the circulation water tank 12 is: length 700mm × width 400mm. The circulation water tank 12 is divided into a straight section and a conical bottom. The height of the straight section is 250mm, the height of the conical bottom is 200mm, and the inner diameter of the pipeline 4 is DN12 mm.

[0064] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the protection scope of the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, any person skilled in the art within the technical scope disclosed by the present invention can make equivalent substitutions or changes according to the technical solution and the inventive concept of the present invention. These simple variations all belong to the protection scope of the present invention.

[0065] In addition, it should be noted that, among the various specific technical features described in the above specific embodiments, they can be combined in any suitable way without contradiction. To avoid unnecessary repetition, the present invention will not describe various possible combination methods separately.

[0066] In addition, any combination can be made between various different embodiments of the present invention as long as it does not violate the idea of the present invention, and it should also be regarded as the content disclosed by the present invention.

Claims

1. A waste rock acid production effect evaluation device, characterized in that: The invention comprises a reaction shell (1), an acid generating reactor (2), a metering pump (3) and a circulating water tank (12), wherein a circulating water tank (12) is provided at the bottom of the reaction shell (1), and first legs (13) are respectively provided at the four corners of the bottom thereof, and a sampling and emptying valve (8) is provided at the water outlet at the bottom of the circulating water tank (12); the acid generating reactor (2) and the metering pump (3) are respectively fixed on both sides of the inside of the reaction shell (1), and a baffle (14) is provided in the reaction shell (1) between the acid generating reactor (2) and the metering pump (3); the liquid inlet of the metering pump (3) is connected to the circulating water tank (12), the liquid outlet of the metering pump (3) is connected to the acid generating reactor (2) through a pipeline (4) and a nozzle (7), and a filter screen (17) is provided at the bottom of the acid generating reactor (2).

2. The waste rock acid generation effect evaluation device according to claim 1, characterized in that: A first valve (5) and a second valve (6) are provided in sequence on the pipeline (4) between the metering pump (3) and the nozzle (7), and a plurality of nozzles (7) in communication with the first valve (5) and the second valve (6) are provided on the pipeline (4) between the first valve (5) and the second valve (6), so that the nozzles (7) are located at the top opening of the acid generating reactor (2); and a pH meter is provided on the circulating water tank (12).

3. The waste rock acid generation effect evaluation device according to claim 1, characterized in that: A grid (15) is provided at the bottom of the reaction shell (1) between the reaction shell (1) and the circulating water tank (12); the acid-generating reactor (2) and the metering pump (3) are both placed on the grid (15); and the pipeline at the liquid inlet of the metering pump (3) passes through the grid (15) and extends into the circulating water tank (12).

4. The waste rock acid generation effect evaluation device according to claim 1, characterized in that: The pipeline (4) is fixed on the inner wall of the reaction shell (1) via a bracket.

5. The waste rock acid generation effect evaluation device according to claim 1, characterized in that: The baffle (14) is sealed and connected inside the reaction shell (1).

6. The waste rock acid generation effect evaluation device according to claim 1, characterized in that: The acid generating reactor (2) is a cylindrical body with upper and lower openings, and the filter screen (17) at the bottom is fixed to the bottom opening of the acid generating reactor (2) through two upper and lower sealing flanges (16), and a handle (19) is provided on the outer side wall of the acid generating reactor (2).

7. The waste rock acid generation effect evaluation device according to claim 1, characterized in that: The bottom of the acid generating reactor (2) is supported in the reaction shell (1) by a second support leg (18).

8. The waste rock acid generation effect evaluation device according to claim 1, characterized in that: The reaction shell (1) is provided with a first operating side door (9) and a second operating side door (10) on both side walls, the top is an upper cover (11), the bottom is open, a circulating water tank (12) is connected to the opening, and a grille (15) is provided between the top of the circulating water tank (12) and the reaction shell (1).

9. The waste rock acid generation effect evaluation device according to claim 1, characterized in that: A second operating side door (10) is provided on the side wall of the reaction shell (1) close to the acid generating reactor (2), and a first operating side door (9) is provided on the side wall of the reaction shell (1) close to the metering pump (3); a handle (19) is provided on the side wall of the acid generating reactor (2).

Images