Valve group for controlling parameters of concentrate nozzle of flash smelting furnace

Abstract

The utility model relates to the technical field of copper smelting flash furnaces, in particular to a valve group for controlling parameters of a concentrate nozzle of a flash smelting furnace, which comprises a natural gas flow regulation control valve group and an air oxygen regulation control valve group, the natural gas flow regulation control valve group comprises a natural gas pipe and a cooling air pipe, and a manual stop valve and a thermal resistor are arranged on the natural gas pipe. A manual stop valve and a pneumatic stop valve are arranged on a cooling air pipe, and a pressure transmitter, a pneumatic stop valve and a flow adjusting system are arranged on the cooling air pipe. The air and oxygen adjusting control valve set comprises an oxygen pipe, a distribution air drying pipe, a cooling water return pipe and a cooling water supply pipe. The oxygen pipe is provided with a manual stop valve, a thermal resistor, a pressure transmitter, a pneumatic stop valve and a flow adjusting system. The valve group can realize adjustment control of parameters such as process air speed, distribution air flow, oxygen flow and natural gas flow and equipment protection, and improves the production capacity and process index of the flash furnace.

Description

Technical Field

[0001] The utility model relates to the technical field of copper smelting flash furnaces, in particular to a valve group used for controlling parameters of a flash smelting furnace concentrate nozzle. Background Art

[0002] The concentrate nozzle is the core equipment of the flash furnace. The central injection nozzle is widely used at present. This nozzle has the advantages of large smelting capacity, good reaction performance, small damage to the tower wall, small smoke rate, and low fuel consumption. It is the most popular nozzle type at present.

[0003] Production practice shows that if the nozzle parameters are not properly controlled, such as changes in the oxygen-to-material ratio (O2 / material), a series of problems will occur, such as inadequate reaction, accumulation of raw materials in the sedimentation tank, nodules at the bottom of the nozzle, abnormal melt temperature, copper matte grade, slag type and smoke rate, abnormally high temperature of the reaction tower, serious loss of refractory materials at the top of the tower, and even deformation of the external steel support. These situations seriously trouble production.

[0004] Therefore, the control and adjustment of parameters such as process wind speed, distributed wind flow, oxygen flow, and natural gas flow of the concentrate nozzle are very critical to production. Utility Model Content

[0005] The utility model aims to provide a valve group for the reaction of the concentrate nozzle of a flash smelting furnace, which is used to realize the regulation and control of parameters such as process wind speed, distributed wind flow, oxygen flow, natural gas flow and equipment protection, so as to improve the production capacity and process indicators of the flash furnace.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions: a valve group for controlling the parameters of the concentrate nozzle of a flash smelting furnace, comprising a natural gas flow regulating control valve group and an air oxygen regulating control valve group, the natural gas flow regulating control valve group comprising a natural gas pipe and a cooling air duct, the natural gas pipe is provided with a manual stop valve, a thermal resistor, a pressure transmitter, a pneumatic shut-off valve, and a flow regulating system, the cooling air duct is provided with a manual stop valve and a pneumatic shut-off valve;

[0007] The air-oxygen regulating control valve group includes an oxygen pipe, a distribution air main pipe, a cooling water return pipe, and a cooling water supply pipe. The oxygen pipe is provided with a manual stop valve, a thermal resistor, a pressure transmitter, a pneumatic shut-off valve, and a flow regulating system. The distribution air main pipe is provided with a manual stop valve, a thermal resistor, a pressure transmitter, and a flow regulating system. The distribution air main pipe is connected to a first distribution air branch pipe and a second distribution air branch pipe, wherein the first distribution air branch pipe leads to the oxygen pipe. The first distribution air branch pipe is provided with a manual stop valve, a pneumatic shut-off valve, and a flow meter. The second distribution air branch pipe is provided with a manual stop valve and a pneumatic shut-off valve. The cooling water return pipe is provided with a manual stop valve, a flow meter, and a thermal resistor. The cooling water supply pipe is provided with a pressure transmitter, a manual stop valve, a flow meter, and a thermal resistor.

[0008] It also includes an instrument compressed air pipe, which is used to supply air to the pneumatic valves on each pipeline.

[0009] In some embodiments, an on-site pressure gauge is provided on the natural gas pipeline.

[0010] In some embodiments, filters are provided on both the natural gas pipe and the cooling water supply pipe.

[0011] In some embodiments, the natural gas pipe, the cooling air pipe and the first distribution air branch pipe are all provided with check valves.

[0012] In some embodiments, a pressure reducing valve is provided on the cooling air duct.

[0013] In some embodiments, the flow regulation system includes a flow meter and a pneumatic regulating valve.

[0014] In some embodiments, the pneumatic shut-off valve on the oxygen pipe is signal-interlocked with the flow meter to form a low-flow control system.

[0015] In some embodiments, the oxygen pipe is interlocked with the valve position switch signal of the pneumatic shut-off valve on the first distribution air branch pipe.

[0016] In some embodiments, the pneumatic shut-off valve on the natural gas pipe is interlocked with the temperature in the flash smelting furnace.

[0017] In some embodiments, a field junction box is also included, and signals of all instruments and valves are connected to the field junction box. After being merged in the field junction box, they are sent to the DCS control system for centralized control in the DCS control system.

[0018] In summary, the utility model has the following beneficial effects:

[0019] The valve group can realize precise regulation and control of parameters such as process wind speed, distributed wind flow, oxygen flow, natural gas flow and so on of the flash smelting furnace concentrate nozzle, improve the production capacity and process indicators of the flash smelting furnace, ensure the full progress of the smelting reaction, reduce the occurrence of problems such as raw material accumulation, nodules, smoke dust rate, etc., reduce fuel consumption and furnace lining loss, and extend the furnace life.

[0020] The valve group also has the function of equipment protection. It can perform interlock control according to signals such as the furnace temperature and oxygen-to-material ratio, automatically cut off or replenish natural gas, oxygen, distributed air and other media, prevent the furnace temperature from being too high or too low, prevent the concentrate from flowing back into the gas pipeline, prevent the occurrence of explosion accidents, and ensure the safe operation of the equipment.

[0021] The valve group also has a centralized control function, which can connect the signals of various instruments and valves to the on-site junction box, and then centrally control them through the DCS control system, making it convenient for operators to monitor and adjust the parameters of the concentrate nozzles, thereby improving the convenience and efficiency of operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a flow chart of the natural gas flow regulating control valve group of the utility model;

[0023] Figure 2 It is a side view of the natural gas flow regulating control valve group of the utility model;

[0024] Figure 3 This is a front view of the natural gas flow regulating control valve group of the utility model;

[0025] Figure 4 This is a flow chart of the air-oxygen regulating control valve group of the utility model;

[0026] Figure 5 It is a side view of the air-oxygen regulating control valve group of the utility model;

[0027] Figure 6 This is the front view of the air-oxygen regulating control valve group of the utility model;

[0028] Figure 7 for Figure 5 The cross-sectional view at BB;

[0029] Figure 8 for Figure 5 Cross-sectional view at CC of .

[0030] In the figure: 1. Natural gas pipe; 101. Manual stop valve A; 102. On-site pressure gauge; 103. Filter A; 104. Thermal resistor A; 105. Pressure transmitter A; 106. Flow meter A; 107. Manual stop valve B; 108. Pneumatic shut-off valve A; 109. Pneumatic shut-off valve B; 110. Pneumatic shut-off valve C; 111. Pneumatic regulating valve A; 112. Check valve A; 113. Pressure transmitter B;

[0031] 2. Cooling air duct; 201. Manual stop valve C; 202. Pressure reducing valve; 203. Pneumatic shut-off valve D; 204. Check valve B;

[0032] 3. Instrument compressed air pipe;

[0033] 4. Oxygen pipe; 401. Manual stop valve D; 402. Thermal resistor B; 403. Pressure transmitter C; 404. Pneumatic shut-off valve E; 405. Flow meter B; 406. Pneumatic regulating valve B; 407. Pressure transmitter D;

[0034] 5. Distributed air dry pipe; 501. Manual stop valve E; 502. Thermal resistor C; 503. Pressure transmitter E; 504. Flow meter C; 505. Pneumatic regulating valve C; 506. Manual stop valve F; 507. Pressure transmitter F;

[0035] 6. First distribution air branch pipe; 601. Manual stop valve G; 602. Pneumatic shut-off valve F; 603. Flow meter D; 604. Check valve C; 605. Manual stop valve H;

[0036] 7. Second distribution air branch pipe; 701. Manual shut-off valve I; 702. Pneumatic shut-off valve G;

[0037] 8. Cooling water return pipe; 801. Manual stop valve J; 802. Flow meter E; 803. Manual stop valve K; 804. Thermal resistor D;

[0038] 9. Cooling water supply pipe; 901. Pressure transmitter G; 902. Manual stop valve L; 903. Filter B; 904. Manual stop valve M; 905. Manual stop valve N; 906. Flow meter F; 907. Manual stop valve O; 908. Pressure transmitter H; 909. Thermal resistor E; 910. Manual stop valve P. DETAILED DESCRIPTION

[0039] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0040] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] The utility model relates to a valve group for controlling the parameters of the flash smelting furnace concentrate nozzle. The valve group can realize the precise adjustment and control of the process wind speed, distributed wind flow, oxygen flow, natural gas flow and other parameters of the flash smelting furnace concentrate nozzle, improve the production capacity and process indicators of the flash smelting furnace, ensure the full progress of the smelting reaction, reduce the occurrence of problems such as raw material accumulation, nodules, smoke dust rate, etc., reduce fuel consumption and furnace lining loss, and extend the life of the furnace. The valve group also has an equipment protection function, can perform interlocking control according to signals such as furnace temperature and oxygen-to-material ratio, automatically cut off or supplement natural gas, oxygen, distributed wind and other media, prevent the furnace temperature from being too high or too low, prevent the concentrate from flowing back into the gas pipeline, prevent the occurrence of explosion accidents, and ensure the safe operation of the equipment. The valve group also has a centralized control function, can connect the signals of various instruments and valves to the on-site junction box, and then perform centralized control through the DCS control system, so that the operator can monitor and adjust the parameters of the concentrate nozzle conveniently, and improve the convenience and efficiency of operation.

[0044] The technical solution of the utility model is achieved in this way:

[0045] The utility model provides a valve group for controlling parameters of a flash smelting furnace concentrate nozzle, comprising a natural gas flow regulating control valve group and an air-oxygen regulating control valve group.

[0046] like Figure 1-3 As shown, the natural gas flow regulating control valve group includes a natural gas pipe 1 and a cooling air pipe 2. Natural gas is used as fuel to add heat to the concentrate reaction, and the cooling air is used to cool the fuel port of the concentrate nozzle.

[0047] A manual stop valve A101, a field pressure gauge 102, a filter A103, a thermal resistor A104, a pressure transmitter A105, a flow meter A106, a manual stop valve B107, a pneumatic shut-off valve A108, a pneumatic shut-off valve B109, a pneumatic regulating valve A111, a check valve A112 and a pressure transmitter B113 are sequentially arranged on the natural gas pipe 1 along the transmission direction. A natural gas release pipe is connected to the positions between the manual stop valve B107 and the pneumatic shut-off valve A108 and between the pneumatic shut-off valve A108 and the pneumatic shut-off valve B109 on the natural gas pipe 1. The two natural gas release pipes are combined into one pipe at one end away from the natural gas pipe 1 for outward transmission, and a pneumatic shut-off valve C110 is arranged on the natural gas release pipe between the pneumatic shut-off valve A108 and the pneumatic shut-off valve B109.

[0048] Manual stop valve A101 and manual stop valve B107 are used to isolate the natural gas pipeline 1 to facilitate maintenance and overhaul.

[0049] The on-site pressure gauge 102 facilitates on-site observation of the natural gas pressure value.

[0050] Filter A103 filters natural gas to remove impurities such as moisture, tar and dust that may exist in the natural gas to ensure the quality of the natural gas.

[0051] Thermal resistor A104 is used to measure the temperature of natural gas and transmit the temperature signal to the DCS control system for temperature monitoring and control.

[0052] Pressure transmitter A105 is used to measure the pressure of natural gas and transmit the pressure signal to the DCS control system for pressure monitoring and control.

[0053] Flow meter A106 is used to measure the flow of natural gas and transmit the flow signal to the DCS control system for flow monitoring and control.

[0054] The three pneumatic shut-off valves, namely, pneumatic shut-off valve A108, pneumatic shut-off valve B109 and pneumatic shut-off valve C110, are interlocked with the temperature in the flash smelting furnace. When the temperature in the furnace reaches a certain value, pneumatic shut-off valve A108 is closed and pneumatic shut-off valve C110 is opened, so that air is filled between pneumatic shut-off valve A108 and pneumatic shut-off valve B109. When the temperature in the furnace is lower than a certain value, pneumatic shut-off valve A108 is opened and pneumatic shut-off valve C110 is closed, and the supply of natural gas is restored. This increases the safety of the natural gas flow regulating control valve group.

[0055] The pneumatic control valve A111 is used to adjust the flow of natural gas. According to the instructions of the DCS control system, the valve opening is automatically adjusted to achieve precise control of the natural gas flow. The flow meter A106 and the pneumatic control valve A111 form a flow control system to ensure the stability of the natural gas flow.

[0056] Check valve A112 is used to prevent the concentrate nozzle / concentrate in the furnace from flowing back into the gas pipeline under abnormal circumstances, blocking the pipeline and even causing an explosion.

[0057] The pressure transmitter B113 is used to measure the outlet pressure of the natural gas pipeline 1 and transmit the pressure signal to the DCS control system for pressure monitoring and control.

[0058] A manual stop valve C201, a pressure reducing valve 202, a pneumatic shut-off valve D203 and a check valve B204 are sequentially arranged on the cooling air duct 2 along the transmission direction. The cooling air duct 2 leads to the position between the check valve A112 and the pressure transmitter B113 on the natural gas pipe 1.

[0059] Manual stop valve C201 is used to isolate the cooling air duct 2 to facilitate maintenance and inspection.

[0060] The pressure reducing valve 202 is used to reduce the pressure of the cooling air, control the pressure of the cooling air entering the concentrate nozzle, and ensure the effect of the cooling air.

[0061] The pneumatic shut-off valve D203 is used to control the supply of cooling air. According to the instructions of the DCS control system, the valve is automatically opened or closed to cut off or supplement the cooling air.

[0062] Check valve B204 is used to prevent the concentrate nozzle / concentrate in the furnace from flowing back into the gas pipeline under abnormal circumstances, blocking the pipeline and even causing an explosion.

[0063] like Figure 4-8As shown, the air-oxygen regulating control valve group includes an oxygen pipe 4, a distributed air dry pipe 5, a cooling water return pipe 8 and a cooling water supply pipe 9. The distributed air is the main driving force for the concentrate to be radially distributed in the reaction tower of the flash smelting furnace. The flow rate of the distributed air mainly affects the reaction time and integrity of the concentrate. The main function of oxygen is to prevent the central axis area of ​​the reaction tower body of the furnace from not getting enough reactive oxygen due to over-dense materials, and to maintain a certain oxygen-to-material ratio. The cooling water pipe is used to cool the bottom plate of the concentrate nozzle.

[0064] A manual stop valve D401, a thermal resistor B402, a pressure transmitter C403, a pneumatic shut-off valve E404, a flow meter B405, a pneumatic regulating valve B406 and a pressure transmitter D407 are sequentially arranged on the oxygen pipe 4 along the transmission direction.

[0065] The manual stop valve D401 is used to isolate the oxygen pipe 4 to facilitate maintenance and overhaul.

[0066] Thermal resistor B402 is used to measure the temperature of oxygen and transmit the temperature signal to the DCS control system for temperature monitoring and control.

[0067] Pressure transmitter C403 is used to measure the pressure of oxygen and transmit the pressure signal to the DCS control system for pressure monitoring and control.

[0068] The pneumatic shut-off valve E404 is used to control the supply of oxygen. According to the instructions of the DCS control system, the valve is automatically opened or closed to cut off or replenish oxygen. The pneumatic shut-off valve E404 is signal interlocked with the flow meter B405 to form a low flow control system. When the signal of the flow meter B405 on the oxygen pipe 4 is lower than the set value, the pneumatic shut-off valve E404 on the oxygen pipe 4 is automatically closed to prevent the oxygen inlet temperature of the concentrate nozzle valve group from being too high due to low oxygen flow.

[0069] Flow meter B405 is used to measure the flow of oxygen and transmit the flow signal to the DCS control system for flow monitoring and control.

[0070] The pneumatic control valve B406 is used to adjust the flow of oxygen. According to the instructions of the DCS control system, the valve opening is automatically adjusted to achieve precise control of the oxygen flow. The flow meter B405 and the pneumatic control valve B406 form a flow control system to ensure the stability of the oxygen flow.

[0071] The pressure transmitter D407 is used to measure the outlet pressure of the oxygen pipe 4 and transmit the pressure signal to the DCS control system for pressure monitoring and control.

[0072] A manual stop valve E501, a thermal resistor C502, a pressure transmitter E503, a flow meter C504, a pneumatic regulating valve C505, a manual stop valve F506 and a pressure transmitter F507 are sequentially arranged on the distribution air main pipe 5 along the transmission direction.

[0073] Manual stop valve E501 and manual stop valve F506 are used to isolate the distribution air main pipe 5 to facilitate maintenance and inspection.

[0074] Thermal resistor C502 is used to measure the temperature of the distributed air and transmit the temperature signal to the DCS control system for temperature monitoring and control.

[0075] Pressure transmitter E503 and pressure transmitter F507 are used to measure the pressure of distributed air and transmit the pressure signal to the DCS control system for pressure monitoring and control.

[0076] Flow meter C504 is used to measure the flow of distributed air and transmit the flow signal to the DCS control system for flow monitoring and control.

[0077] The pneumatic control valve C505 is used to adjust the flow of distributed air. According to the instructions of the DCS control system, the valve opening is automatically adjusted to achieve precise control of the distributed air flow. The flow meter C504 and the pneumatic control valve C505 form a flow control system to ensure the stability of the distributed air flow.

[0078] The distributed air main pipe 5 is connected to a first distributed air branch pipe 6 and a second distributed air branch pipe 7, wherein the first distributed air branch pipe 6 leads to the oxygen pipe 4, and the starting points of the first distributed air branch pipe 6 and the second distributed air branch pipe 7 are both located between the pressure transmitter E503 and the flow meter C504 on the distributed air main pipe 5, wherein the first distributed air branch pipe 6 leads to a position between the pneumatic regulating valve B406 and the pressure transmitter D407 on the oxygen pipe 4.

[0079] A manual stop valve G601, a pneumatic shut-off valve F602, a flow meter D603, a check valve C604 and a manual stop valve H605 are sequentially arranged on the first distribution air branch pipe 6 along the transmission direction.

[0080] The manual stop valve G601 and the manual stop valve H605 are used to isolate the first distribution air branch pipe 6 to facilitate maintenance and overhaul.

[0081] The pneumatic shut-off valve F602 is used to control the supply of the first distributed air branch pipe 6. According to the instruction of the DCS control system, the valve is automatically opened or closed to realize the shut-off or replenishment of the first distributed air branch pipe 6. The pneumatic shut-off valve F602 is interlocked with the valve position switch signal of the pneumatic shut-off valve E404. When the pneumatic shut-off valve E404 on the oxygen pipe 4 is closed, the pneumatic shut-off valve F602 on the first distributed air branch pipe 6 is automatically opened to replenish the distributed air to the oxygen pipe 4. Ensure that there is sufficient airflow in the oxygen pipe 4 to prevent the oxygen inlet temperature of the concentrate nozzle valve group from being too high due to low oxygen flow.

[0082] The flow meter D603 is used to measure the flow of the first distributed air branch pipe 6 and transmit the flow signal to the DCS control system for flow monitoring and control.

[0083] Check valve C604 is used to prevent the concentrate nozzle / concentrate in the furnace from flowing back into the gas pipeline under abnormal circumstances, blocking the pipeline and even causing an explosion.

[0084] A manual stop valve I701 and a pneumatic shut-off valve G702 are sequentially arranged on the second distribution air branch pipe 7 along the transmission direction.

[0085] The manual stop valve I701 is used to isolate the second distribution air branch pipe 7 to facilitate maintenance and inspection.

[0086] The pneumatic shut-off valve G702 is used to control the supply of the second distributed air branch pipe 7. According to the instruction of the DCS control system, the valve is automatically opened or closed to realize the shut-off or replenishment of the second distributed air branch pipe 7. The cooling water return pipe 8 is provided with a manual shut-off valve J801, a flow meter E802, a manual shut-off valve K803 and a thermal resistor D804 in sequence along the transmission direction.

[0087] Manual stop valve J801 and manual stop valve K803 are used to isolate the cooling water return pipe 8 to facilitate maintenance and overhaul.

[0088] Flow meter E802 is used to measure the return flow of cooling water and transmit the flow signal to the DCS control system for flow monitoring and control.

[0089] Thermal resistor D804 is used to measure the return temperature of cooling water and transmit the temperature signal to the DCS control system for temperature monitoring and control.

[0090] The cooling water supply pipe 9 is provided with pressure transmitter G901, manual stop valve L902, filter B903, manual stop valve M904, manual stop valve N905, flow meter F906, manual stop valve O907, pressure transmitter H908, thermal resistor E909 and manual stop valve P910 in sequence along the transmission direction. The cooling water supply pipe 9 is used to cool the bottom plate of the concentrate nozzle.

[0091] Pressure transmitter G901 and pressure transmitter H908 are used to measure the cooling water supply pressure and transmit the pressure signal to the DCS control system for pressure monitoring and control.

[0092] Manual stop valve L902, manual stop valve M904, manual stop valve N905, manual stop valve O907 and manual stop valve P910 are used to isolate the cooling water supply pipe 9 to facilitate maintenance and overhaul.

[0093] Filter B903 is used to filter cooling water, remove impurities that may exist in the cooling water, and ensure the quality of the cooling water.

[0094] Flow meter F906 is used to measure the cooling water supply flow rate and transmit the flow signal to the DCS control system for flow monitoring and control.

[0095] Thermal resistor E909 is used to measure the feed water temperature of cooling water and transmit the temperature signal to the DCS control system for temperature monitoring and control.

[0096] like Figure 2 , 3 As shown in Figures 5 and 6, the valve group for controlling the parameters of the flash smelting furnace concentrate nozzle also includes an instrument compressed air pipe 3, which is used to supply air to the pneumatic valves on each pipeline. The pipeline and each component are fixedly assembled into a valve group by a fixed bracket.

[0097] In addition, in order to realize centralized automatic control, the valve group used for flash smelting furnace concentrate nozzle parameter control also includes a field junction box. The signals of all instruments and valves are connected to the field junction box, and then sent to the DCS control system after being merged in the field junction box for centralized control in the DCS control system.

[0098] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A valve group for controlling parameters of a flash smelting furnace concentrate nozzle, comprising a natural gas flow regulating control valve group and an air and oxygen regulating control valve group, characterized in that: The natural gas flow regulating control valve group comprises a natural gas pipe (1) and a cooling air pipe (2); the natural gas pipe (1) is provided with a manual shut-off valve, a thermal resistor, a pressure transmitter, a pneumatic shut-off valve, and a flow regulating system; the cooling air pipe (2) is provided with a manual shut-off valve and a pneumatic shut-off valve; The air-oxygen regulating control valve group comprises an oxygen pipe (4), a distribution air main pipe (5), a cooling water return pipe (8), and a cooling water supply pipe (9). The oxygen pipe (4) is provided with a manual stop valve, a thermal resistor, a pressure transmitter, a pneumatic shut-off valve, and a flow regulating system. The distribution air main pipe (5) is provided with a manual stop valve, a thermal resistor, a pressure transmitter, and a flow regulating system. The distribution air main pipe (5) is connected to a first distribution air branch pipe (6) and a second distribution air branch pipe (7). The first distribution air branch pipe (6) leads to the oxygen pipe (4). The first distribution air branch pipe (6) is provided with a manual stop valve, a pneumatic shut-off valve, and a flow meter. The second distribution air branch pipe (7) is provided with a manual stop valve and a pneumatic shut-off valve. The cooling water return pipe (8) is provided with a manual stop valve, a flow meter, and a thermal resistor. The cooling water supply pipe (9) is provided with a pressure transmitter, a manual stop valve, a flow meter, and a thermal resistor. It also comprises an instrument compressed air pipe (3), wherein the instrument compressed air pipe (3) is used to supply air to the pneumatic valves on each pipeline.

2. A valve group for controlling parameters of a flash smelting furnace concentrate nozzle according to claim 1, characterized in that: The natural gas pipe (1) is provided with an on-site pressure gauge (102).

3. A valve group for controlling parameters of a flash smelting furnace concentrate nozzle according to claim 1, characterized in that: The natural gas pipe (1) and the cooling water supply pipe (9) are both provided with filters.

4. A valve group for controlling parameters of a flash smelting furnace concentrate nozzle according to claim 1, characterized in that: The natural gas pipe (1), the cooling air pipe (2) and the first distribution air branch pipe (6) are all provided with check valves.

5. A valve group for controlling parameters of a flash smelting furnace concentrate nozzle according to claim 1, characterized in that: The cooling air duct (2) is provided with a pressure reducing valve (202).

6. A valve group for controlling parameters of a flash smelting furnace concentrate nozzle according to claim 1, characterized in that: The flow regulating system comprises a flow meter and a pneumatic regulating valve.

7. A valve group for controlling parameters of a flash smelting furnace concentrate nozzle according to claim 6, characterized in that: The pneumatic shut-off valve on the oxygen pipe (4) is signal-interlocked with the flow meter to form a low-flow control system.

8. The valve group for controlling parameters of a flash smelting furnace concentrate nozzle according to claim 1, characterized in that: The oxygen pipe (4) is interlocked with the valve position switch signal of the pneumatic shut-off valve on the first distribution air branch pipe (6) for control.

9. A valve group for controlling parameters of a flash smelting furnace concentrate nozzle according to claim 1, characterized in that: The pneumatic shut-off valve on the natural gas pipe (1) is interlocked with the temperature in the flash smelting furnace for control.

10. A valve group for controlling parameters of a flash smelting furnace concentrate nozzle according to claim 1, characterized in that: It also includes a field junction box, and the signals of all instruments and valves are connected to the field junction box. After the lines are merged in the field junction box, they are sent to the DCS control system, and centralized control is performed in the DCS control system.

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