A continuous leaching control system for pyrolusite or crude manganese dioxide

Abstract

The utility model provides a kind of pyrolusite or coarse manganese dioxide continuous leaching control system, it is related to hydrometallurgy equipment technical field, the control system for pyrolusite or coarse manganese dioxide wet continuous leaching manganese sulfate, including leaching device, burning sulfur power generation device, connecting pipeline, pulping bucket feed proportion control mechanism, first and second absorption tower feed control mechanism, first absorption tower discharge control mechanism, realize the automation device of pyrolusite or coarse manganese dioxide continuous steady state leaching.

Description

Technical Field

[0001] This utility model relates to the field of hydrometallurgical equipment technology, specifically to a continuous leaching control system for pyrolusite or crude manganese dioxide. Background Technology

[0002] Battery-grade manganese sulfate, as a key precursor in lithium-ion battery cathode materials (such as nickel-cobalt-manganese ternary materials), directly affects the battery's energy density and cycle life. The most commonly used manganese ore pre-reduction leaching methods are coal-roasting-sulfuric acid leaching and two-ore roasting-sulfuric acid leaching, while direct acid leaching methods include two-ore acid addition and SO2 reduction leaching. Currently, manganese sulfate production processes mostly employ intermittent operation, resulting in low production efficiency, significant non-productive time (such as loading, unloading, cleaning, heating / cooling, and waiting time), low equipment utilization, and output per unit time far lower than continuous production. Frequent manual intervention requires more operators to perform repetitive batch operations, monitoring, recording, and cleaning work, leading to relatively low automation. There is also the risk of batch-to-batch product quality variations. Each batch is operated independently, and factors such as feeding accuracy, operation sequence, time control, and equipment cleanliness can affect batch-to-batch product quality, posing a greater challenge to quality control.

[0003] Given the disadvantages of low automation in intermittent production, there is an urgent need for a system that can achieve continuous steady-state leaching, automated control, and energy cascade utilization. Utility Model Content

[0004] To address the problems of low efficiency, poor stability, and resource waste in existing traditional processes, this utility model proposes a continuous leaching control system for pyrolusite or crude manganese dioxide. It is an automated control system for the continuous wet leaching of manganese sulfate from pyrolusite. By integrating the leaching device, the sulfur incineration power generation device, and the multi-level control mechanism, it achieves continuous steady-state leaching and efficient resource utilization.

[0005] The technical method of the continuous leaching control system for pyrolusite or crude manganese dioxide described in this utility model is as follows: By using automated control mechanisms to achieve coordinated operation of slurry preparation, sulfur dioxide absorption, liquid level regulation, and sulfur incineration power generation, a control method for controlling the amount of liquid sulfur added and the amount of leached material produced has been developed, reducing the problem of manual intervention and achieving continuous steady-state operation.

[0006] The objective of this utility model is achieved through the following technical solution: A continuous leaching control system for pyrolusite or crude manganese dioxide includes a leaching device, a sulfur incineration power generation device, a control mechanism and control valves, and connecting pipelines. The leaching apparatus includes: a pyrolusite or crude manganese dioxide powder silo (A1), a pyrolusite or crude manganese dioxide belt scale (A2), a slurry mixing tank (A3), a slurry transfer pump (A4), a secondary absorption tower (A5), a secondary circulation pump (A6), a primary absorption tower (A7), a primary circulation pump (A8), a transfer tank (A9), and a transfer pump (A10); wherein, the pyrolusite or crude manganese dioxide powder silo (A1) stores pyrolusite or crude manganese dioxide powder with qualified particle size and moisture content. Manganese dioxide is prepared by mixing soft manganese ore or crude manganese dioxide with process water in a mixing tank (A3) via a belt scale (A2) and process water pipe (B2) to form a homogeneous slurry. The secondary absorption tower (A5) is connected in series with the primary absorption tower (A7). The secondary absorption tower (A5) reabsorbs the residual gas at the top of the primary absorption tower (A7) to improve the utilization rate of sulfur dioxide. The transfer tank (A9) is used to temporarily store the slurry output from the primary absorption tower and then sends it out through the transfer pump (A10). The sulfur-burning power generation unit includes: a sulfur hopper (A11), a sulfur conveyor belt (A12), a sulfur melting tank (A13), a liquid sulfur pump (A14), a sulfur incinerator (A15), a boiler (A16), and a generator set (A17); wherein, the sulfur melting tank (A13) melts sulfur into liquid sulfur by steam heating, the sulfur incinerator (A15) burns the liquid sulfur with dry air to generate high-temperature sulfur dioxide, the boiler (A16) recovers the waste heat to generate electricity, and the generator set (A17) generates electricity using the high-pressure steam from the boiler and discharges medium-pressure steam for downstream use; The control valves include: process water valve (C1), slurry feed regulating valve (C2), slurry feed limiting valve (C3), slurry bridging regulating valve (C4), slurry bridging limiting valve (C5), discharge regulating valve (C6), discharge limiting valve (C7), steam regulating valve (C8), and auxiliary sampling valve (C9). The control mechanisms include: a pulping tank feed ratio control mechanism, a secondary absorption tower feed control mechanism, a primary absorption tower feed control mechanism, a primary absorption tower discharge control mechanism, and a sulfur melting control mechanism in the sulfur combustion power generation unit; wherein: The feed proportioning control mechanism for the pulping tank includes a pulping tank level transmitter (D1), a pulping tank level display controller (D2), a weight recording transmitter for the soft manganese ore or crude manganese dioxide belt scale (D3), a process water flow transmitter (D4), and a process water flow proportioning display controller (D5); the feed control mechanism for the secondary absorption tower includes a secondary absorption tower bottom level transmitter (D6), a secondary absorption tower bottom level display controller (D7), and a secondary absorption tower bottom level high / low alarm (D8); the feed control mechanism for the primary absorption tower (i.e., the discharge from the secondary absorption tower) includes a secondary absorption tower... The system includes: a high / low level alarm at the bottom of the primary absorption tower (D8), a level transmitter at the bottom of the primary absorption tower (D9), and a level display controller at the bottom of the primary absorption tower (D10); a discharge control mechanism for the primary absorption tower including a low level alarm at the bottom of the primary absorption tower (D11), a liquid sulfur flow transmitter (D12), a discharge flow transmitter (D13), and a liquid sulfur discharge flow ratio display controller (D14); and a sulfur melting control mechanism in the sulfur combustion power generation unit including a sulfur melting tank level transmitter (D15), a sulfur melting tank level display controller (D16), and a sulfur melting tank temperature controller (D17). The connecting pipelines include: soft manganese ore or crude manganese dioxide feed (B1), process water pipe (B2), slurry conveying pipe (B3), secondary absorption circulation pipe (B4), gas phase bridge pipe (B5), tail gas pipe (B6), slurry bridge pipe (B7), primary absorption circulation pipe (B8), discharge pipe (B9), transfer pipe (B10); sulfur feed (B11), steam heating pipe (B12), condensate pipe (B13), dry air pipe (B14), liquid sulfur spraying pipe (B15), high temperature sulfur dioxide gas pipe (B16), and low temperature sulfur dioxide gas pipe (B17).

[0007] Furthermore, the leaching device includes: a pyrolusite or crude manganese dioxide powder silo (A1) for storing pyrolusite or crude manganese dioxide with acceptable particle size and moisture content; a pyrolusite or crude manganese dioxide belt scale (A2) for accurately measuring the weight of the pyrolusite or crude manganese dioxide; a slurry mixing tank (A3) for mixing the formulated weight of pyrolusite or crude manganese dioxide with the formulated volume of process water to form a uniform slurry; a slurry transfer pump (A4) for conveying the slurry from the tank to the secondary absorption tower (A5); and a primary absorption tower (A7) for the absorption of the pyrolusite slurry by the sulfur incineration power generation unit. The generated sulfur dioxide is absorbed in the first stage; the second stage absorption tower (A5) is used for the reabsorption of the residual gas at the top of the first stage absorption tower. The first stage absorption tower (A7) and the second stage absorption tower (A5) are connected in series; the first stage circulation pump (A8) is used for the circulation spraying and discharge pump of the slurry in the first stage absorption tower; the second stage circulation pump (A6) is used for the circulation spraying and discharge pump of the slurry in the second stage absorption tower (A5); the transfer tank (A9) is used as a temporary storage tank for the discharge of the first stage absorption tower (A7); the transfer pump (A10) is used to transport the material in the transfer tank to outside the control system.

[0008] Furthermore, in the aforementioned sulfur-fired power generation device: a sulfur hopper (A11) is used to store solid sulfur for later use; a sulfur conveyor belt (A12) is used to transport the solid sulfur in the sulfur hopper (A11) to the sulfur melting tank (A13); the sulfur melting tank (A13) is used to melt the solid sulfur into liquid sulfur by heating with steam coils; a liquid sulfur pump (A14) is used to pump the liquid sulfur in the sulfur melting tank (A13) into the sulfur-fired furnace (A15); the sulfur-fired furnace (A15) is used to mix the liquid sulfur with dry air in the combustion chamber to generate sulfur dioxide; a boiler (A16) is used to recover the high-pressure steam generated by the sulfur-fired furnace (A15); and a generator set (A17) uses the high-pressure steam produced by the boiler (A16) to drive a back-pressure steam turbine to generate electricity and discharge medium-pressure steam to the steam network for use by downstream users.

[0009] Furthermore, the connecting pipelines include: a soft manganese ore or crude manganese dioxide feedstock (B1) is transported from outside the control system into the control system; a process water pipe (B2) connects the control system's slurry tank (A3) to the process water network; a slurry conveying pipe (B3) connects the control system's slurry tank (A3) to the slurry conveying pump (A4) and the secondary absorption tower (A5); a secondary absorption circulation pipe (B4) connects the bottom of the secondary absorption tower (A5) to the tower body for internal slurry circulation; and a gas phase bridge pipe (B5) connects the primary absorption... The top gas phase of the receiving tower (A7) is connected to the bottom of the secondary absorption tower (A5) to form a series structure; the tail gas pipe (B6) connects the top gas phase of the secondary absorption tower (A5) to a desulfurization unit outside this control system for tail gas desulfurization treatment; the slurry bridge pipe (B7) connects the secondary absorption circulation pipe (B4) to the bottom of the primary absorption tower (A7) for transferring the slurry in the secondary absorption tower (A5) to the primary absorption tower (A7); the primary absorption circulation pipe (B8) connects the bottom of the primary absorption tower (A7) to its tower body for internal slurry circulation; the discharge pipe (B9) discharges... The primary absorption circulation pipe (B8) is connected to the transfer tank (A9) for transferring the slurry from the primary absorption tower (A7) to the transfer tank (A9); the transfer pipe (B10) is used to transport the material in the transfer tank (A9) to processes outside this control system; sulfur feed (B11) refers to the solid sulfur being loaded into the sulfur hopper (A11) using loading and unloading tools; the steam heating pipe (B12) is used to connect the heating coil in the sulfur melting tank (A13) to the steam network; the condensate pipe (B13) is used to connect the heating coil in the sulfur melting tank (A13) to the condensate network, discharging the heated water. Condensate in the coil; Dry air pipe (B14) is used to connect the dry air of the air drying system to the sulfur incinerator (A15); Liquid sulfur injection pipe (B15) connects the molten sulfur tank (A13) and the liquid sulfur pump (A14) to the sulfur incinerator (A15) for liquid sulfur transportation; High-temperature sulfur dioxide gas pipe (B16) is used to connect the sulfur incinerator (A15) and the boiler (A16) to transport high-temperature sulfur dioxide gas; Low-temperature sulfur dioxide gas pipe (B17) connects the sulfur dioxide generated by the sulfur incineration power generation unit and the leaching unit for transporting sulfur dioxide gas.

[0010] Furthermore, the control valves include: a process water valve (C1) installed on the process water pipe, valve position number (LV0201 FC), indicating a pneumatic control valve that closes due to power failure; a slurry feed control valve (C2) installed on the slurry delivery pipe (B3), valve position number (LV0202 FC), indicating a pneumatic control valve that closes due to power failure; a slurry feed limiting valve (C3) installed on the air supply line of the slurry feed control valve (C2), used to control the on / off of the air supply to the slurry feed control valve (C2), valve position number (XV0203 FO), indicating a solenoid valve that opens due to power failure; and a slurry bridging control valve (C4) installed on the slurry bridging pipe (B7), valve position number (LV0204 FC), indicating a pneumatic control valve that closes due to power failure. FC) indicates a pneumatic control valve that closes due to energy failure; the slurry bridging limiting valve (C5) is installed on the air supply line of the slurry bridging control valve (C4) to control the on / off state of the air supply to the slurry bridging control valve (C4), and its valve position number (XV0205 FO) indicates a solenoid valve that opens due to energy failure; the discharge control valve (C6) is installed on the discharge pipe (B9), and its valve position number (LV0206 FC) indicates a pneumatic control valve that closes due to energy failure; the discharge limiting valve (C7) is installed on the air supply line of the discharge control valve (C6) to control the on / off state of the air supply to the discharge control valve (C6), and its valve position number (XV0207 FO) indicates a solenoid valve that opens due to energy failure; the steam control valve (C8) is installed on the steam heating pipe (B12), and its valve position number (LV0101) indicates a solenoid valve that opens due to energy failure. FC) refers to a valve type that uses a pneumatic control valve to shut off in case of energy failure; the auxiliary sampling valve (C9) is installed on the outlet pipe of the low-temperature sulfur dioxide gas pipe (B17) to collect gas samples and detect their sulfur dioxide concentration.

[0011] Furthermore, the control mechanism is used for: Pulping ratio control: The liquid level transmitter (D1) and the process water flow ratio display controller (D5) are linked to adjust the ratio of soft manganese ore or crude manganese dioxide to water; Dynamic liquid level regulation: The secondary absorption tower liquid level transmitter (D6) controls the feed through the regulating valve (C2), and the secondary absorption tower bottom liquid level high and low alarm (D8) triggers the limiting valve (C3) to prevent overflow; Sulfur combustion temperature control: Temperature controller (D17) of the molten sulfur tank (A13) regulates the steam valve (C8) to maintain a stable liquid sulfur temperature; Specifically: the pulping tank level transmitter (D1) monitors the liquid level signal of the pulping tank (A3) and transmits the signal to the pulping tank level display controller (D2). The pulping tank level display controller (D2) displays the liquid level value and controls the actuator process water valve (C1) to adjust the valve opening; the soft manganese ore or crude manganese dioxide belt scale (A2) weight recording transmitter (D3) monitors the weight signal of the soft manganese ore or crude manganese dioxide belt scale (A2) and transmits the signal to the process water flow proportional display controller (D5); the process water flow transmitter (D4) monitors the process water flow signal and also transmits the signal to the process water flow... The proportional display controller (D5) receives signals from the weight recording transmitter (D3) of the soft manganese ore or crude manganese dioxide belt scale and the process water flow transmitter (D4), performs proportional calculations based on preset parameters, and displays the calculation results. Based on the calculation results, it controls the operating frequency of the actuator motor of the soft manganese ore or crude manganese dioxide belt scale (A2) to achieve stable pulping control. The secondary absorber bottom level transmitter (D6) monitors the liquid level signal and transmits it to the secondary absorber bottom level display controller (D7). The secondary absorber bottom level display controller (D7) displays the liquid level signal. The system displays the liquid level and controls the slurry feed regulating valve (C2) to adjust its opening. The secondary absorber bottom liquid level alarm (D8) monitors the liquid level signal and transmits a 20mA high alarm signal and a 4mA low alarm signal. After receiving its 24mA high alarm signal, the slurry feed limiting valve (C3) closes its solenoid valve to cut off the gas supply to the slurry feed regulating valve C2 and stop the feed to the secondary absorber (A5). This achieves the function of stabilizing the liquid level feed to the secondary absorber (A5) and preventing overflow due to excessive liquid level. The secondary absorber bottom liquid level alarm (D8) monitors the liquid level signal and transmits a 20mA high alarm signal and a 4mA low alarm signal. The signal is transmitted from the liquid level transmitter (D9) at the bottom of the primary absorption tower to the liquid level display controller (D10). The liquid level display controller (D10) displays the liquid level value and controls the actuator slurry bridging regulating valve (C4) to adjust the valve opening. After receiving its 4mA low alarm signal, the solenoid valve of the slurry bridging limiting valve (C5) closes and cuts off the gas source of the slurry bridging regulating valve (C4) to stop the discharge of the secondary absorption tower (A5). This realizes the stable liquid level discharge of the secondary absorption tower (A7) and the control function of avoiding idling due to low liquid level, which is also the feeding function of the primary absorption tower (A7).The high / low level alarm (D11) at the bottom of the primary absorption tower monitors the liquid level signal and transmits a 20mA high alarm signal and a 4mA low alarm signal. The liquid sulfur flow transmitter (D12) monitors the liquid sulfur flow signal delivered by the liquid sulfur pump (A14) and transmits the signal to the liquid sulfur discharge flow ratio display controller (D14). The discharge flow transmitter (D13) monitors the flow in the discharge pipe (B9) and feeds back the discharge flow to the liquid sulfur discharge flow ratio display controller (D14). The liquid sulfur discharge flow ratio display controller (D14) receives the signals from the liquid sulfur flow transmitter (D12) and the discharge flow transmitter (D13), performs proportional calculations according to preset parameters, displays the calculation results, and controls the actuator discharge regulating valve (C6) based on the calculation results to adjust the valve opening to achieve liquid... The sulfur flow rate is proportional to the discharge flow rate. The discharge limiting valve (C7) receives a 4mA low-level alarm signal from the low-level alarm (D11) at the bottom of the primary absorption tower and cuts off the gas supply to the discharge regulating valve (C6) to stop discharge and prevent the liquid level in the primary absorption tower (A7) from becoming too low. The level transmitter (D15) in the molten sulfur tank (A13) monitors and transmits the liquid level signal to the level display controller (D16) of the molten sulfur tank (A13). The level display controller (D16) displays the liquid level value of the molten sulfur tank (A13) and controls the operating frequency of the sulfur conveyor belt (A12) motor to feed molten sulfur. The temperature controller (D17) in the molten sulfur tank (A13) monitors and displays the temperature of the molten sulfur tank (A13) and controls the steam regulating valve (C8) to adjust the valve opening, thus achieving controllable molten sulfur temperature.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. The continuous leaching control system for soft manganese ore or crude manganese dioxide described in this utility model can achieve continuous steady-state leaching and realize continuous feeding and discharging of slurry through multi-level liquid level control and proportional adjustment.

[0013] 2. The continuous leaching control system for soft manganese ore or crude manganese dioxide described in this utility model enables efficient resource utilization, reduces energy consumption by generating electricity from waste heat from the sulfur incinerator, and reduces the desulfurization load of the tail gas by using a series structure of two-stage absorption towers.

[0014] 3. The continuous leaching control system for soft manganese ore or crude manganese dioxide described in this utility model is automated. The liquid level alarm is linked with the pneumatic valve to avoid malfunctions such as overflowing tanks and dry running, and to reduce manual intervention. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a continuous leaching control system for soft manganese ore or crude manganese dioxide according to the present invention. Figure 2 This is a pulping control diagram of a continuous leaching control system for soft manganese ore or crude manganese dioxide according to the present invention. Figure 3This is a feed control diagram of the secondary absorption tower of a continuous leaching control system for soft manganese ore or crude manganese dioxide as described in this utility model. Figure 4 This is a diagram showing the feed and discharge control of the primary absorption tower in a continuous leaching control system for soft manganese ore or crude manganese dioxide as described in this utility model. Figure 5 This is a control diagram of the molten sulfur tank in a continuous leaching control system for soft manganese ore or crude manganese dioxide as described in this utility model.

[0016] Figure labels: A1, pyrolusite or crude manganese dioxide powder silo; A2, pyrolusite or crude manganese dioxide belt scale; A3, slurry tank; A4, slurry transfer pump; A5, secondary absorption tower; A6, secondary circulation pump; A7, primary absorption tower; A8, primary circulation pump; A9, transfer tank; A10, transfer pump; A11, sulfur hopper; A12, sulfur conveyor belt; A13, sulfur melting tank; A14, liquid sulfur pump; A15, sulfur incinerator; A16, boiler; A17, generator set; B1, pyrolusite or crude manganese dioxide powder silo. Manganese feed; B2, Process water pipe; B3, Slurry conveying pipe; B4, Secondary absorption circulation pipe; B5, Gas phase bridge connection; B6, Tail gas pipe; B7, Slurry bridge connection; B8, Primary absorption circulation pipe; B9, Discharge pipe; B10, Transfer pipe; B11, Sulfur feed; B12, Steam heating pipe; B13, Condensate pipe; B14, Dry air pipe; B15, Liquid sulfur spray pipe; B16, High-temperature sulfur dioxide gas pipe; B17, Low-temperature sulfur dioxide gas pipe; C1, Process water valve; C2, Slurry feed regulating valve C3. Slurry feed limiting valve; C4. Slurry bridging regulating valve; C5. Slurry bridging limiting valve; C6. Discharge regulating valve; C7. Discharge limiting valve; C8. Steam regulating valve; C9. Auxiliary sampling valve; D1. Slurry tank level transmitter; D2. Slurry tank level display controller; D3. Soft manganese ore or crude manganese dioxide belt scale weight recording transmitter; D4. Process water flow transmitter; D5. Process water flow proportional display controller; D6. Secondary absorption tower bottom level transmitter; D7. Secondary absorption tower bottom level transmitter. Display controller; D8, Secondary absorber tower bottom liquid level high / low alarm; D9, Primary absorber tower bottom liquid level transmitter; D10, Primary absorber tower bottom liquid level display controller; D11, Primary absorber tower bottom liquid level low alarm; D12, Liquid sulfur flow transmitter; D13, Discharge flow transmitter; D14, Liquid sulfur discharge flow proportional display controller; D15, Sulfur melting tank level transmitter in the sulfur combustion power generation unit; D16, Sulfur melting tank level display controller; D17, Sulfur melting tank temperature controller. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] The continuous leaching control system for soft manganese ore or crude manganese dioxide described in this embodiment includes a leaching device, a sulfur incineration power generation device, a control mechanism and control valves, and connecting pipelines. The leaching device includes: a silo for pyrolusite or crude manganese dioxide powder A1, a belt scale for pyrolusite or crude manganese dioxide A2, a slurry preparation tank A3, a slurry transfer pump A4, a secondary absorption tower A5, a secondary circulation pump A6, a primary absorption tower A7, a primary circulation pump A8, a transfer tank A9, and a transfer pump A10. The silo for pyrolusite or crude manganese dioxide powder A1 stores pyrolusite or crude manganese dioxide with acceptable particle size and moisture content. In the slurry preparation tank A3, pyrolusite or crude manganese dioxide added in proportion by the belt scale A2 and process water pipe B2 is mixed with process water to form a homogeneous slurry. The secondary absorption tower A5 is connected in series with the primary absorption tower A7. The secondary absorption tower A5 reabsorbs the residual gas at the top of the primary absorption tower A7, improving the utilization rate of sulfur dioxide. The transfer tank A9 is used to temporarily store the slurry output from the primary absorption tower and is then pumped out via the transfer pump A10. The sulfur incineration power generation unit includes: a sulfur hopper A11, a sulfur conveyor belt A12, a sulfur melting tank A13, a liquid sulfur pump A14, a sulfur incineration furnace A15, a boiler A16, and a generator set A17; wherein, the sulfur melting tank A13 melts sulfur into liquid sulfur through steam heating, the sulfur incineration furnace A15 burns the liquid sulfur with dry air to generate high-temperature sulfur dioxide, the boiler A16 recovers the waste heat to generate electricity, and the generator set A17 uses the high-pressure steam from the boiler to generate electricity and discharges medium-pressure steam for downstream use; The control valves include: process water valve C1, slurry feed regulating valve C2, slurry feed limiting valve C3, slurry bridging regulating valve C4, slurry bridging limiting valve C5, discharge regulating valve C6, discharge limiting valve C7, steam regulating valve C8, and auxiliary sampling valve C9. The control mechanisms include: a pulping tank feed ratio control mechanism, a secondary absorption tower feed control mechanism, a primary absorption tower feed control mechanism, a primary absorption tower discharge control mechanism, and a sulfur melting control mechanism in the sulfur combustion power generation unit; wherein: The feed ratio control mechanism for the pulping tank includes a pulping tank level transmitter D1, a pulping tank level display controller D2, a soft manganese ore or crude manganese dioxide belt scale weight recording transmitter D3, a process water flow transmitter D4, and a process water flow ratio display controller D5; the feed control mechanism for the secondary absorption tower includes a secondary absorption tower bottom level transmitter D6, a secondary absorption tower bottom level display controller D7, and a secondary absorption tower bottom level high / low alarm D8; the feed control mechanism for the primary absorption tower includes the secondary absorption tower... The system includes: a bottom liquid level alarm D8, a first-stage absorber bottom liquid level transmitter D9, and a first-stage absorber bottom liquid level display controller D10; the first-stage absorber discharge control mechanism includes a first-stage absorber bottom liquid level low alarm D11, a liquid sulfur flow transmitter D12, a discharge flow transmitter D13, and a liquid sulfur discharge flow ratio display controller D14; the sulfur melting control mechanism in the sulfur combustion power generation unit includes a sulfur melting tank level transmitter D15, a sulfur melting tank level display controller D16, and a sulfur melting tank temperature controller D17. The connecting pipelines include: soft manganese ore or crude manganese dioxide feed pipe B1, process water pipe B2, slurry conveying pipe B3, secondary absorption circulation pipe B4, gas phase bridge pipe B5, tail gas pipe B6, slurry bridge pipe B7, primary absorption circulation pipe B8, discharge pipe B9, transfer pipe B10; sulfur feed pipe B11, steam heating pipe B12, condensate pipe B13, dry air pipe B14, liquid sulfur spraying pipe B15, high temperature sulfur dioxide gas pipe B16, and low temperature sulfur dioxide gas pipe B17. The leaching apparatus includes: a pyrolusite or crude manganese dioxide powder silo A1 for storing pyrolusite or crude manganese dioxide with acceptable particle size and moisture content; a pyrolusite or crude manganese dioxide belt scale A2 for accurately measuring the weight of the pyrolusite or crude manganese dioxide; a slurry mixing tank A3 for mixing the prescribed weight of pyrolusite or crude manganese dioxide with the prescribed volume of process water to form a uniform slurry; a slurry transfer pump A4 for transporting the slurry from the tank to the secondary absorption tower A5; and a primary absorption tower A7 for the treatment of sulfur-fired power generation equipment with the pyrolusite slurry. The generated sulfur dioxide is absorbed in the first stage; the second-stage absorption tower A5 is used for the reabsorption of the residual gas at the top of the first-stage absorption tower; the first-stage absorption tower A7 and the second-stage absorption tower A5 are connected in series; the first-stage circulating pump A8 is used for the circulating spray and discharge pump of the slurry in the first-stage absorption tower; the second-stage circulating pump A6 is used for the circulating spray and discharge pump of the slurry in the second-stage absorption tower A5; the transfer tank A9 is used as a temporary storage tank for the discharge of the first-stage absorption tower A7; the transfer pump A10 is used to transport the material in the transfer tank to outside this control system. The sulfur-fired power generation unit comprises: a sulfur hopper A11 for storing solid sulfur for later use; a sulfur conveyor belt A12 for conveying the solid sulfur in the sulfur hopper A11 to a sulfur melting tank A13; a sulfur melting tank A13 for melting the solid sulfur into liquid sulfur through a steam coil; a liquid sulfur pump A14 for pumping the liquid sulfur in the sulfur melting tank A13 into a sulfur-fired furnace A15; a sulfur-fired furnace A15 for mixing the liquid sulfur with dry air in a combustion chamber to generate sulfur dioxide; a boiler A16 for recovering the high-pressure steam generated by the sulfur-fired furnace A15; and a generator set A17 using the high-pressure steam produced by the boiler A16 to drive a back-pressure turbine to generate electricity and discharge medium-pressure steam to the steam network for use by downstream users. The connecting pipelines include: Soft manganese ore or crude manganese dioxide feed material B1 is transported from outside the control system into the control system; process water pipe B2 connects the control system's slurry tank A3 to the process water network; slurry conveying pipe B3 connects the control system's slurry tank A3 to the slurry conveying pump A4 and the secondary absorption tower A5; secondary absorption circulation pipe B4 connects the bottom of the secondary absorption tower A5 to the tower body for internal slurry circulation; gas phase bridge pipe B5 connects the top gas phase of the primary absorption tower A7 to the bottom of the secondary absorption tower A5 to form a series structure; tail gas pipe B6 connects the top gas phase of the secondary absorption tower A5 to a desulfurization device outside the control system for tail gas desulfurization treatment; slurry bridge pipe B7 connects the secondary absorption circulation pipe B4 to the bottom of the primary absorption tower A7 for transferring slurry from the secondary absorption tower A5 to the primary absorption tower A7; primary absorption circulation pipe B8 connects the bottom of the primary absorption tower A7 to its tower body for internal slurry circulation; and discharge pipe B9 connects the primary absorption... Circulation pipe B8 connects to transfer tank A9 and is used to transfer slurry from primary absorption tower A7 to transfer tank A9; transfer pipe B10 is used to transport material from transfer tank A9 to processes outside this control system; sulfur feed B11 refers to the loading of solid sulfur into sulfur hopper A11 using loading and unloading tools; steam heating pipe B12 connects the heating coil in sulfur melting tank A13 to the steam network; condensate pipe B13 connects the heating coil in sulfur melting tank A13 to the condensate network, draining the condensate from the heating coil. Condensate; Dry air pipe B14 is used to connect the dry air of the air drying system to the sulfur incinerator A15; Liquid sulfur injection pipe B15 connects the molten sulfur tank A13 and the liquid sulfur pump A14 to the sulfur incinerator A15 for liquid sulfur transportation; High-temperature sulfur dioxide gas pipe B16 is used to connect the sulfur incinerator A15 and the boiler A16 to transport high-temperature sulfur dioxide gas; Low-temperature sulfur dioxide gas pipe B17 connects the sulfur dioxide generated by the sulfur incineration power generation unit and the leaching unit for transporting sulfur dioxide gas. The control valves include: process water valve C1 installed on the process water pipe, valve position number LV0201 FC (meaning it is a pneumatic control valve that closes due to power failure); slurry feed control valve C2 installed on the slurry delivery pipe B3, valve position number LV0202FC (meaning it is a pneumatic control valve that closes due to power failure); slurry feed limiting valve C3 installed on the air supply line of slurry feed control valve C2, used to control the on / off of the air supply to slurry feed control valve C2, valve position number XV0203 FO (meaning it is a solenoid valve that opens due to power failure); slurry bridging control valve C4 installed on the slurry bridging pipe B7, valve position number LV0204 FC (meaning it is a pneumatic control valve that closes due to power failure); and slurry bridging limiting valve C5 installed on the air supply line of slurry bridging control valve C4, used to control the on / off of the air supply to slurry bridging control valve C4, valve position number XV0205. FO indicates a solenoid valve that opens in case of power failure; discharge regulating valve C6 is installed on discharge pipe B9, valve number LV0206; FC indicates a pneumatic regulating valve that closes in case of power failure; discharge limiting valve C7 is installed on the gas supply line of discharge regulating valve C6 to control the on / off of the gas supply to valve C6, valve number XV0207; FO indicates a solenoid valve that opens in case of power failure; steam regulating valve C8 is installed on steam heating pipe B12, valve number LV0101; FC indicates a pneumatic regulating valve that closes in case of power failure; auxiliary sampling valve C9 is installed on the outlet pipe of low-temperature sulfur dioxide gas pipe B17 to collect gas samples and detect its sulfur dioxide concentration. The control mechanism is used for: Pulping ratio control: The liquid level transmitter D1 and the process water flow ratio display controller D5 are linked to adjust the ratio of soft manganese ore or crude manganese dioxide to water; Dynamic liquid level regulation: The liquid level transmitter D6 of the secondary absorption tower controls the feed through the regulating valve C2, and the high and low liquid level alarm D8 at the bottom of the secondary absorption tower triggers the limiting valve C3 to prevent overflow; Sulfur combustion temperature control: Temperature controller D17 of molten sulfur tank A13 regulates steam valve C8 to maintain stable liquid sulfur temperature; Specifically: Level transmitter D1 of pulping tank A3 monitors the liquid level signal of pulping tank A3 and transmits the signal to level display controller D2 of pulping tank A3. Level display controller D2 of pulping tank A3 displays the liquid level value and controls actuator process water valve C1 to adjust the valve opening; Weight recording transmitter D3 of belt scale A2 for soft manganese ore or crude manganese dioxide monitors the weight signal of belt scale A2 for soft manganese ore or crude manganese dioxide and transmits the signal to process water flow proportional display controller D5; process water flow transmitter D4 monitors the process water flow signal and also transmits the signal to process water... The flow ratio display controller D5 receives signals from the weight recording transmitter D3 (for soft manganese ore or crude manganese dioxide belt scale) and the process water flow transmitter D4. It performs proportional calculations based on preset parameters and displays the results. Based on the calculation results, it controls the operating frequency of the actuator motor A2 (for soft manganese ore or crude manganese dioxide belt scale) to achieve stable pulping control. The bottom liquid level transmitter D6 of the secondary absorption tower A5 monitors the liquid level signal and transmits it to the bottom liquid level display controller D7 of the secondary absorption tower A5. Controller D7 displays the liquid level value and... The actuator controls the slurry feed regulating valve C2 to adjust the valve opening. The secondary absorber A5's bottom liquid level alarm D8 monitors the liquid level signal and transmits a 20mA high alarm signal and a 4mA low alarm signal. Upon receiving its 24mA high alarm signal, the slurry feed limiting valve C3 closes its solenoid valve, cutting off the C2 gas supply and stopping the feed to the secondary absorber A5. This achieves stable liquid level feeding to the secondary absorber A5 and prevents overflow due to excessive liquid level. The secondary absorber A5's bottom liquid level alarm D8 monitors the liquid level signal and transmits a 20mA high alarm signal. The level transmitter D9 at the bottom of the first-stage absorber A7 monitors the level signal and transmits it to the level display controller D10 at the bottom of the first-stage absorber A7. The controller D10 displays the level value and controls the actuator slurry bridging regulating valve C4 to adjust the valve opening. After receiving the 4mA low alarm signal, the solenoid valve of the slurry bridging limiting valve C5 closes and cuts off the gas source of the slurry bridging regulating valve C4 to stop the discharge of the second-stage absorber A5. This realizes the stable level discharge of the second-stage absorber A7 and the control function of avoiding idling due to low level, which is also the feeding function of the first-stage absorber A7.The high / low level alarm D11 at the bottom of the primary absorption tower A7 monitors the liquid level signal and transmits a 20mA high alarm signal and a 4mA low alarm signal. The liquid sulfur flow transmitter D12 monitors the liquid sulfur flow rate signal delivered by the liquid sulfur pump A14 and transmits the signal to the liquid sulfur discharge flow rate proportional display controller D14. The discharge flow rate transmitter D13 monitors the flow rate in the discharge pipe B9 and feeds back the discharge flow rate to the liquid sulfur discharge flow rate proportional display controller D14. The liquid sulfur discharge flow rate proportional display controller D14 receives the signals from the liquid sulfur flow transmitter D12 and the discharge flow rate transmitter D13, performs proportional calculations based on preset parameters, displays the calculation results, and controls the actuator discharge regulating valve C6 based on the calculation results. The valve opening is adjusted to achieve the function of proportional discharge of liquid sulfur flow rate and discharge flow rate. After receiving the 4mA low alarm signal from the low liquid level alarm D11 at the bottom of the first-stage absorption tower, the discharge limiting valve C7 cuts off the gas source of the discharge regulating valve C6 to stop the discharge and prevent the liquid level of the first-stage absorption tower A7 from being too low. The liquid level transmitter D15 of the molten sulfur tank A13 monitors and transmits the liquid level signal to the liquid level display controller D16 of the molten sulfur tank A13. The controller D16 displays the liquid level value of the molten sulfur tank A13 and controls the operating frequency of the actuator sulfur conveyor belt A12 motor to feed molten sulfur. The temperature controller D17 of the molten sulfur tank A13 monitors and displays the temperature of the molten sulfur tank A13 and controls the actuator steam regulating valve C8 to adjust the valve opening to achieve the function of controllable molten sulfur temperature. Specifically: 1. See Figures 1-4 As shown, the slurry preparation and conveying control mechanism involves the following steps: pyrolusite or crude manganese dioxide is metered by belt scale A2 and then enters the slurry preparation tank A3. Process water valve C1 injects water proportionally according to the weight of pyrolusite or crude manganese dioxide, and level transmitter D1 provides real-time feedback and adjustment to form a uniform slurry. Slurry conveying pump A4 pumps the slurry into the secondary absorption tower A5, and level controller D7 controls the flow rate through regulating valve C2. When the level exceeds the limit, limiting valve C3 cuts off the air source and stops the feeding. 2. See Figures 1-4 As shown, the sulfur dioxide absorption and leaching control mechanism is as follows: the high-temperature sulfur dioxide generated by the sulfur incinerator A15 is cooled by the boiler A16 and then enters the primary absorption tower A7 through the low-temperature sulfur dioxide gas pipe B17, where it reacts with the slurry in a countercurrent manner to generate manganese sulfate; the unabsorbed residual gas enters the secondary absorption tower A5 through the gas phase bridge pipe B5 for secondary absorption, and the tail gas is discharged after being treated by the desulfurization device. 3. See also Figures 1-5 As shown, the liquid sulfur and discharge control mechanism is as follows: the liquid level of the molten sulfur tank A13 is regulated by the frequency of the sulfur conveyor belt A12, and the temperature controller D17 maintains the liquid sulfur temperature through the steam valve C8; the discharge flow rate of the primary absorption tower A7 is dynamically adjusted by the liquid sulfur discharge flow rate proportional display controller D14 according to the liquid sulfur flow rate D12, and the discharge valve C6 is cut off when the liquid level is too low. Specific control measures include: Stable discharge of liquid sulfur from the primary absorption tower A7; a high / low level alarm D11 at the bottom of the primary absorption tower A7 monitors the liquid level signal and transmits a 20mA high alarm signal and a 4mA low alarm signal; a liquid sulfur flow transmitter D12 monitors the liquid sulfur flow rate delivered by the liquid sulfur pump A14 and transmits the signal to the liquid sulfur discharge flow rate proportional display controller D14; and a discharge flow transmitter D13 monitors the discharge pipe flow rate and feeds it back to the liquid sulfur discharge flow rate proportional display controller D14. The liquid sulfur discharge flow rate proportional display controller (D14) receives signals from the liquid sulfur flow transmitter D12 and the discharge flow transmitter D13, performs proportional calculations based on preset parameters, and displays the calculation results. Based on the calculation results, it controls the actuator discharge regulating valve C6 to adjust the valve opening and achieve the function of proportional discharge of liquid sulfur flow rate and discharge flow rate. After receiving the 4mA low alarm signal from the low liquid level alarm D11 at the bottom of the first-stage absorption tower, the discharge limiting valve C7 cuts off the gas source of the discharge regulating valve C6 to stop the discharge and prevent the liquid level of the first-stage absorption tower A7 from being too low.

[0019] The continuous leaching control system for soft manganese ore or crude manganese dioxide described in this utility model can achieve a continuous manganese leaching rate of over 90%, a sulfur dioxide absorption rate of over 98%, waste heat power generation to meet 50% of the device's energy consumption requirements, and a 60% reduction in tail gas desulfurization costs, making it suitable for large-scale industrial production.

[0020] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations of these embodiments without departing from the principles and spirit of this utility model still fall within the protection scope of this utility model.

Claims

1. A continuous leaching control system for pyrolusite or crude manganese dioxide, characterized in that: Includes leaching equipment, sulfur incineration power generation equipment, control mechanisms and control valves, and connecting pipelines; The leaching device includes: a pyrolusite or crude manganese dioxide powder silo (A1), a pyrolusite or crude manganese dioxide belt scale (A2), a slurry preparation tank (A3), a slurry transfer pump (A4), a secondary absorption tower (A5), a secondary circulation pump (A6), a primary absorption tower (A7), a primary circulation pump (A8), a transfer tank (A9), and a transfer pump (A10). The pyrolusite or crude manganese dioxide powder silo (A1) stores pyrolusite or crude manganese dioxide with acceptable particle size and moisture content. In the slurry preparation tank (A3), pyrolusite or crude manganese dioxide is added in proportion by the belt scale (A2) and process water pipe (B2) with process water to form a homogeneous slurry. The secondary absorption tower (A5) is connected in series with the primary absorption tower (A7), and the secondary absorption tower (A5) reabsorbs the residual gas at the top of the primary absorption tower (A7). The transfer tank (A9) is used to temporarily store the slurry output from the primary absorption tower and is then pumped out via the transfer pump (A10). The sulfur-burning power generation unit includes: a sulfur hopper (A11), a sulfur conveyor belt (A12), a sulfur melting tank (A13), a liquid sulfur pump (A14), a sulfur incinerator (A15), a boiler (A16), and a generator set (A17); wherein, the sulfur melting tank (A13) melts sulfur into liquid sulfur by steam heating, the sulfur incinerator (A15) burns the liquid sulfur with dry air to generate high-temperature sulfur dioxide, the boiler (A16) recovers the waste heat to generate electricity, and the generator set (A17) generates electricity using the high-pressure steam from the boiler and discharges medium-pressure steam for downstream use; The control mechanisms include: a slurry tank feed ratio control mechanism, a secondary absorption tower feed control mechanism, a primary absorption tower feed control mechanism, a primary absorption tower discharge control mechanism, and a sulfur melting control mechanism in the sulfur combustion power generation unit; wherein: The feed proportioning control mechanism for the pulping tank includes a pulping tank level transmitter (D1), a pulping tank level display controller (D2), a weight recording transmitter for the soft manganese ore or crude manganese dioxide belt scale (D3), a process water flow transmitter (D4), and a process water flow proportioning display controller (D5); the feed control mechanism for the secondary absorption tower includes a secondary absorption tower bottom level transmitter (D6), a secondary absorption tower bottom level display controller (D7), and a secondary absorption tower bottom level high / low alarm (D8); the feed control mechanism for the primary absorption tower includes the secondary absorption tower bottom level... The system includes a low / high level alarm (D8), a liquid level transmitter at the bottom of the primary absorption tower (D9), and a liquid level display controller at the bottom of the primary absorption tower (D10); the discharge control mechanism of the primary absorption tower includes a low liquid level alarm at the bottom of the primary absorption tower (D11), a liquid sulfur flow transmitter (D12), a discharge flow transmitter (D13), and a liquid sulfur discharge flow ratio display controller (D14); the sulfur melting control mechanism in the sulfur combustion power generation unit includes a sulfur melting tank level transmitter (D15), a sulfur melting tank level display controller (D16), and a sulfur melting tank temperature controller (D17). The control valves include: process water valve (C1), slurry feed regulating valve (C2), slurry feed limiting valve (C3), slurry bridging regulating valve (C4), slurry bridging limiting valve (C5), discharge regulating valve (C6), discharge limiting valve (C7), steam regulating valve (C8), and auxiliary sampling valve (C9). The connecting pipelines include: soft manganese ore or crude manganese dioxide feed (B1), process water pipe (B2), slurry conveying pipe (B3), secondary absorption circulation pipe (B4), gas phase bridge pipe (B5), tail gas pipe (B6), slurry bridge pipe (B7), primary absorption circulation pipe (B8), discharge pipe (B9), transfer pipe (B10); sulfur feed (B11), steam heating pipe (B12), condensate pipe (B13), dry air pipe (B14), liquid sulfur spraying pipe (B15), high temperature sulfur dioxide gas pipe (B16), and low temperature sulfur dioxide gas pipe (B17).

2. The continuous leaching control system for pyrolusite or crude manganese dioxide according to claim 1, characterized in that: The leaching apparatus includes: a pyrolusite or crude manganese dioxide powder silo (A1) for storing pyrolusite or crude manganese dioxide with acceptable particle size and moisture content; a pyrolusite or crude manganese dioxide belt scale (A2) for accurately measuring the weight of the pyrolusite or crude manganese dioxide; a slurry mixing tank (A3) for mixing the prescribed weight of pyrolusite or crude manganese dioxide with the prescribed volume of process water to form a uniform slurry; a slurry transfer pump (A4) for conveying the slurry from the tank to the secondary absorption tower; and a primary absorption tower (A7) for the pyrolusite slurry to the sulfur-fired power generation unit. The generated sulfur dioxide undergoes primary absorption; the secondary absorption tower (A5) is used for the reabsorption of residual gas at the top of the primary absorption tower, and the primary absorption tower (A7) and the secondary absorption tower (A5) are connected in series; the primary circulation pump (A8) is used for the circulation spraying and discharge pumping of the slurry in the primary absorption tower; the secondary circulation pump (A6) serves as the circulation spraying and discharge pumping of the slurry in the secondary absorption tower; the transfer tank (A9) serves as a temporary storage tank for the discharge from the primary absorption tower; and the transfer pump (A10) is used to transport the material in the transfer tank to outside this control system.

3. The continuous leaching control system for pyrolusite or crude manganese dioxide according to claim 1, characterized in that: The sulfur-fired power generation device comprises: a sulfur hopper (A11) for storing solid sulfur for later use; a sulfur conveyor belt (A12) for conveying the solid sulfur in the sulfur hopper to a sulfur melting tank (A13); a sulfur melting tank (A13) for melting the solid sulfur into liquid sulfur by heating with steam coils; a liquid sulfur pump (A14) for pumping the liquid sulfur in the sulfur melting tank into a sulfur-fired furnace (A15); a sulfur-fired furnace (A15) for mixing the liquid sulfur with dry air in a combustion chamber to generate sulfur dioxide; a boiler (A16) for recovering the preheated high-pressure steam generated by the sulfur-fired furnace (A15); and a generator set (A17) for using the high-pressure steam generated by the boiler to drive a back-pressure turbine to generate electricity and discharge medium-pressure steam to the steam network for use by downstream users.

4. The continuous leaching control system for pyrolusite or crude manganese dioxide according to claim 1, characterized in that: The connecting pipelines include: a soft manganese ore or crude manganese dioxide feedstock (B1) transported from an external soft manganese ore or crude manganese dioxide unit into the control system; a process water pipe (B2) connecting the control system's slurry tank (A3) to the process water network; a slurry conveying pipe (B3) connecting the control system's slurry tank (A3) to the slurry conveying pump and the secondary absorption tower (A5); a secondary absorption circulation pipe (B4) connecting the bottom of the secondary absorption tower to the tower body for internal slurry circulation; and a gas phase bridge. Connector (B5) connects the top gas phase of the primary absorber to the bottom of the secondary absorber, forming a series structure; tail gas pipe (B6) connects the top gas phase of the secondary absorber to a desulfurization unit outside this control system for tail gas desulfurization treatment; slurry bridge connector (B7) connects the secondary absorption circulation pipe (B4) to the bottom of the primary absorber, used for transferring slurry from the secondary absorber to the primary absorber (A7); primary absorption circulation pipe (B8) connects the bottom of the primary absorber to its body, used for internal slurry circulation; discharge pipe... (B9) Connects the primary absorption circulation pipe (B8) to the transfer tank (A9) for transferring the slurry from the primary absorption tower to the transfer tank (A9); the transfer pipe (B10) is used to transport the material from the transfer tank to the process outside this control system; sulfur feed (B11) refers to the solid sulfur being loaded into the sulfur hopper (A11) using loading and unloading tools; the steam heating pipe (B12) is used to connect the heating coil in the sulfur melting tank to the steam network; the condensate pipe (B13) is used to connect the heating coil in the sulfur melting tank to the condensate network. Pipeline connection to drain condensate from heating coils; Dry air pipe (B14) connects the dry air from the air drying system to the sulfur incinerator; Liquid sulfur injection pipe (B15) connects the molten sulfur tank and liquid sulfur pump to the sulfur incinerator for liquid sulfur transport; High-temperature sulfur dioxide gas pipe (B16) connects the sulfur incinerator to the boiler for transporting high-temperature sulfur dioxide gas; Low-temperature sulfur dioxide gas pipe (B17) connects the sulfur dioxide generated by the sulfur incineration power generation unit and cooled to the leaching unit for transporting sulfur dioxide gas.

5. The continuous leaching control system for pyrolusite or crude manganese dioxide according to claim 1, characterized in that: The control valves include: a process water valve (C1) installed on the process water pipe, valve position number LV0201 FC (meaning it is a pneumatic control valve that closes due to power failure); a slurry feed control valve (C2) installed on the slurry delivery pipe, valve position number LV0202 FC (meaning it is a pneumatic control valve that closes due to power failure); a slurry feed limiting valve (C3) installed on the air supply line of the slurry feed control valve (C2) to control the on / off state of the air supply to the slurry feed control valve (C2), valve position number XV0203 FO (meaning it is a solenoid valve that opens due to power failure); a slurry bridging control valve (C4) installed on the slurry bridging pipe, valve position number LV0204 FC (meaning it is a pneumatic control valve that closes due to power failure); and a slurry bridging limiting valve (C5) installed on the air supply line of the slurry bridging control valve (C4) to control the on / off state of the air supply to the slurry bridging control valve (C4), valve position number XV0205. FO indicates a solenoid valve that opens in case of power failure; the discharge regulating valve (C6) is installed on the discharge pipe, valve number LV0206. FC indicates a pneumatic regulating valve that closes in case of power failure; the discharge limiting valve (C7) is installed on the air supply line of the discharge regulating valve (C6) to control the opening and closing of the air supply to the discharge regulating valve (C6), valve number XV0207. FO indicates a solenoid valve that opens in case of power failure; the steam regulating valve (C8) is installed on the steam heating pipe, valve number LV0101. FC indicates a pneumatic regulating valve that closes in case of power failure; the auxiliary sampling valve (C9) is installed on the outlet pipe of the low-temperature sulfur dioxide gas pipe (B17) to collect gas samples and detect their sulfur dioxide concentration.

6. The continuous leaching control system for pyrolusite or crude manganese dioxide according to claim 1, characterized in that: The control mechanism is used for: Pulping ratio control: The liquid level transmitter (D1) of the pulping tank and the process water flow ratio display controller (D5) are linked to adjust the ratio of soft manganese ore or crude manganese dioxide to water; Dynamic liquid level regulation: The liquid level transmitter (D6) at the bottom of the secondary absorption tower receives the liquid level signal at the bottom of the secondary absorption tower (A5) and controls the feed of the slurry through the feed regulating valve (C2). The high and low liquid level alarm (D8) at the bottom of the secondary absorption tower triggers the feed limiting valve (C3) to prevent overflow. Sulfur combustion temperature control: The sulfur melting tank temperature controller (D17) controls the steam regulating valve (C8) to maintain a stable liquid sulfur temperature; Specifically: the pulping tank level transmitter (D1) monitors the pulping tank level signal and transmits the signal to the pulping tank level display controller (D2). The pulping tank level display controller (D2) displays the level value and controls the actuator process water valve (C1) to adjust the valve opening; the soft manganese ore or crude manganese dioxide belt scale weight recording transmitter (D3) monitors the soft manganese ore or crude manganese dioxide belt scale weight signal and transmits the signal to the process water flow proportional display controller (D5); the process water flow transmitter (D4) monitors the process water flow signal and also transmits the signal to the process water flow proportional display controller. The display controller (D5) receives signals from the weight recording transmitter (D3) of the soft manganese ore or crude manganese dioxide belt scale and the process water flow transmitter (D4), performs proportional calculations based on preset parameters, and displays the calculation results. Based on the calculation results, it controls the operating frequency of the actuator motor of the soft manganese ore or crude manganese dioxide belt scale (A2) to achieve stable pulping control. The secondary absorber bottom level transmitter (D6) monitors the liquid level signal and transmits it to the secondary absorber bottom level display controller (D7), which displays the liquid level. The actuator controls the slurry feed regulating valve (C2) to adjust the valve opening. The secondary absorber bottom liquid level high / low alarm (D8) monitors the liquid level signal and transmits a 20mA high alarm signal and a 4mA low alarm signal. After receiving its 24mA high alarm signal, the slurry feed limiting valve (C3) closes the solenoid valve to cut off the slurry feed regulating valve (C2) and the air source to stop the secondary absorber feed. This achieves the function of stabilizing the liquid level feed of the secondary absorber (A5) and preventing excessive liquid level overflow. The secondary absorber bottom liquid level high / low alarm (D8) monitors the liquid level signal and transmits a 20mA high alarm signal and a 4mA low alarm signal. A 4mA low alarm signal is received. The liquid level transmitter (D9) at the bottom of the primary absorption tower monitors the liquid level signal and transmits it to the liquid level display controller (D10) at the bottom of the primary absorption tower. The liquid level display controller (D10) displays the liquid level value and controls the actuator slurry bridging regulating valve (C4) to adjust the valve opening. After receiving the 4mA low alarm signal, the solenoid valve of the slurry bridging limiting valve (C5) closes and cuts off the gas source of the slurry bridging regulating valve (C4) to stop the discharge of the secondary absorption tower (A5). This achieves the function of stabilizing the liquid level of the secondary absorption tower (A5) and preventing the idling due to excessively low liquid level.The high / low level alarm (D11) at the bottom of the primary absorption tower monitors the liquid level signal and transmits a 20mA high alarm signal and a 4mA low alarm signal. The liquid sulfur flow transmitter (D12) monitors the liquid sulfur flow signal delivered by the liquid sulfur pump (A14) and transmits the signal to the liquid sulfur discharge flow proportional display controller (D14). The discharge flow transmitter (D13) monitors the flow in the discharge pipe (B9) and feeds back the discharge flow to the liquid sulfur discharge flow proportional display controller (D14). The liquid sulfur discharge flow proportional display controller (D14) receives the signals from the liquid sulfur flow transmitter (D12) and the discharge flow transmitter (D13), performs proportional calculations according to preset parameters, displays the calculation results, and controls the actuator to adjust the discharge flow based on the calculation results. The regulating valve (C6) adjusts the valve opening to achieve the function of proportional discharge of liquid sulfur flow and discharge flow. The discharge limiting valve (C7), upon receiving a 4mA low-level alarm signal from the low-level alarm device (D11) at the bottom of the primary absorption tower, cuts off the gas supply to the discharge regulating valve (C6) to stop discharge and prevent the liquid level in the primary absorption tower from becoming too low. The molten sulfur tank level transmitter (D15) monitors and transmits the liquid level signal to the molten sulfur tank level display controller (D16). The molten sulfur tank level display controller (D16) displays the molten sulfur tank level value and controls the operating frequency of the sulfur conveyor motor to feed molten sulfur. The molten sulfur tank temperature controller (D17) monitors and displays the molten sulfur tank temperature and controls the steam regulating valve (C8) to adjust the valve opening, achieving controllable molten sulfur temperature.

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