Top-blown furnace tin smoke dust closed type full-automatic injection system

Abstract

The utility model discloses a closed full-automatic tin smoke blowing system of a top blowing furnace. The closed full-automatic tin smoke blowing system comprises a tin smoke receiving part, a top inlet of the tin smoke dust blowing part is connected with a bottom outlet of the tin smoke dust receiving part, and a bottom outlet of the tin smoke dust blowing part is connected with an inlet of the screw feeder; the pressure relief part is connected with the tin smoke dust receiving part and the tin smoke dust blowing part; the vulcanizing part is connected with the tin smoke dust receiving part and the tin smoke dust blowing part; the purging part is connected with the vulcanization part; the spray gun part can extend into the top blowing furnace, can move to a first position and a second position and is used as a triggering condition for starting blowing and automatically spraying tin smoke dust particles to the top blowing furnace, the spray gun part is connected with a blowing pipeline, and an outlet of the spiral feeder and the blowing part are both connected with the blowing pipeline; and the blowing part is provided with a constant-pressure pore plate for conveying constant quantity of compressed air to the blowing pipeline. The system can provide constant blowing air, and the blowing effect is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of crude tin smelting technology, and more specifically to a closed-loop fully automatic tin fume blowing system for a top-blown furnace. Background Technology

[0002] The existing technology, disclosed in CN118816571A and entitled "A Closed-Loop Circulation Treatment Device and Method for Dust from a Top-Blowing Furnace in Tin Smelting," has certain problems. For example, the volume of compressed air supplied to the top-blown furnace is not constant, and sometimes the volume fluctuates. Excessive volume not only affects the stirring effect and furnace wall scouring, but also carries away some dust. Insufficient volume causes dust to accumulate in the air delivery pipe, resulting in pipe blockage.

[0003] Therefore, how to provide a fully automatic closed-loop blowing system for top-blown tin fumes that can smoothly deliver fumes into the furnace while ensuring a certain air volume to prevent large air volumes from affecting the stirring effect and furnace wall scouring is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the present invention provides a fully automatic closed-loop blowing system for top-blown furnace tin fume that can smoothly deliver fumes into the furnace while ensuring a certain air volume to prevent large air volumes from affecting the stirring effect and furnace wall scouring. Furthermore, the system can automatically execute purging and blowing commands according to the position of the spray gun, ensuring the correspondence between the spray gun position and the blowing program execution, thereby improving the smelting effect of top-blown furnace tin fume.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A fully automatic closed-loop blowing system for tin fume in a top-blown furnace includes:

[0007] Tin fume receiving section, used to collect tin fume particles generated by production equipment;

[0008] A tin fume blowing section, wherein the top inlet of the tin fume blowing section is connected to the bottom outlet of the tin fume receiving section, and is used to receive the tin fume particles discharged from the tin fume receiving section; the bottom outlet of the tin fume blowing section is connected to the inlet of the screw feeder.

[0009] The pressure relief section is connected to both the tin fume receiving section and the tin fume blowing section, and is used to relieve the pressure of the tin fume blowing section through the tin fume receiving section.

[0010] The vulcanizing section is connected to both the tin fume receiving section and the tin fume blowing section, and is used to vulcanize the tin fume particles in the tin fume receiving section and the tin fume blowing section respectively, so as to prevent the tin fume receiving section and the tin fume blowing section from becoming blocked.

[0011] A purging section, which is connected to the vulcanizing section, is used to supply compressed air to the vulcanizing section;

[0012] The spray gun section can extend into the top-blown furnace and can be moved to a first position and a second position to serve as a trigger condition for starting purging and automatically spraying tin fume particles into the top-blown furnace. The spray gun section is connected to a purging pipe. The outlet of the screw feeder and the purging section are both connected to the purging pipe. The purging section is provided with a constant pressure orifice plate for supplying a constant amount of compressed air to the purging pipe.

[0013] The control cabinet is electrically connected to the tin fume receiving section, the tin fume blowing section, the pressure relief section, the sulfidation section, the purging section, and the spray gun section, and is used to realize the automatic purging and blowing of fume particles by the system.

[0014] Furthermore, the spray gun unit includes: a spray gun sliding track, a winch, an encoder, a spray gun, an upper limit switch, and a lower limit switch. The upper limit switch and the lower limit switch are installed on the spray gun sliding track. The spray gun is connected to the spray pipe. The mounting base of the spray gun is slidably connected to the spray gun sliding track. The winch is fixed at the top of the spray gun sliding track. The encoder is installed on the shaft of the winch. The wire rope on the shaft of the winch is fixedly connected to the mounting base of the spray gun. The spray gun moves to the upper limit switch to the first position, and the spray gun moves to the lower limit switch to the second position.

[0015] Furthermore, the tin fume receiving section includes: a tin fume hopper for receiving tin fume particles generated by the production equipment, a bag filter, an outlet dome valve, and a tin fume hopper sulfidation ring. The top of the tin fume hopper is connected to the bag filter, and the bottom outlet of the tin fume hopper is connected to the outlet dome valve. The tin fume hopper sulfidation ring is provided on the inner wall of the tin fume hopper. The outlet dome valve is connected to the top inlet of the tin fume blowing section. The sulfidation section is connected to the tin fume hopper sulfidation ring to provide compressed air to the tin fume hopper sulfidation ring. The tin fume hopper is connected to the pressure relief section to filter and depressurize the air from the tin fume blowing section through the bag filter of the tin fume hopper.

[0016] Furthermore, the tin fume blowing section includes: a blowing tank, an inlet dome valve, a main conveying pipe, a stamping pipe, and a vulcanizing ring for the blowing tank. The top inlet of the blowing tank is connected to the inlet dome valve, and the bottom of the outlet dome valve is connected to the top of the inlet dome valve via a rubber hose. The top of the blowing tank is connected to the main conveying pipe and the stamping pipe respectively. The vulcanizing ring is provided on the inner wall of the blowing tank. The vulcanizing section is connected to the main conveying pipe, the stamping pipe, and the vulcanizing ring for the blowing tank, and is used to provide compressed air to the blowing tank and the vulcanizing ring. A conveying valve is provided on the main conveying pipe, and a stamping valve is provided on the stamping pipe. The blowing tank is connected to the pressure relief section, and is used to filter and depressurize the air in the blowing tank through the bag filter dust collector of the tin fume chamber through the pressure relief section.

[0017] The blowing tank is equipped with a high material level detection switch and / or a weighing instrument, and the tin fume hopper and / or the blowing tank are equipped with a vibrator.

[0018] Furthermore, the pressure relief section includes a pressure relief branch pipe, an exhaust isolation valve, a pressure balancing valve, an exhaust flow regulating valve, an exhaust ball valve, and a pressure relief pipe;

[0019] The two ends of the pressure relief pipe are respectively connected to the top inner cavity of the tin fume dust chamber and the injection tank. One end of the pressure relief branch pipe is connected to the bottom inner cavity of the tin fume dust chamber, and the other end is connected to the inner cavity of the pressure relief pipe through the fifth three-way pipe. The pressure balance valve is installed on the pressure relief branch pipe.

[0020] The exhaust isolation valve is installed on the pressure relief pipe between the tin fume chamber and the fifth three-way pipe; the exhaust flow regulating valve and the blow-off can exhaust ball valve are installed sequentially from top to bottom on the pressure relief pipe between the fifth three-way pipe and the blow-off can.

[0021] Furthermore, the vulcanization section includes: a vulcanization pipe, a first vulcanization branch pipe, and a second vulcanization branch pipe. One end of the vulcanization pipe is connected to the purging section, and the other end is connected to the first port of a first tee pipe. The second port of the first tee pipe is connected to one end of the first vulcanization branch pipe, and the third port of the first tee pipe is connected to one end of the second vulcanization branch pipe. The first vulcanization branch pipe is connected in parallel to the main conveying pipe and the stamping pipe through a second tee pipe and a sixth tee pipe, respectively. The other end of the first vulcanization branch pipe is connected to the vulcanization ring of the dust silo, and the other end of the second vulcanization branch pipe is connected to the vulcanization ring of the injection tank. A main conveying pressure regulating valve is provided on the vulcanization pipe. A silo vulcanization valve is provided on the first vulcanization branch pipe between the sixth tee pipe and the dust silo vulcanization ring. An injection tank vulcanization valve is provided on the second vulcanization branch pipe between the first tee pipe and the injection tank vulcanization ring.

[0022] Furthermore, the purging unit includes a compressed air purging pipe, which is connected to one end of the vulcanizing pipe via a third tee pipe. A flow meter, a pipeline purging valve, a jet flow regulating valve, the constant pressure orifice plate, and a pressure meter are sequentially installed on the compressed air purging pipe from the third tee pipe at the inlet end to the fourth tee pipe. The compressed air purging pipe is connected to the jet pipeline and the jet branch pipe connected to the outlet of the screw feeder via the fourth tee pipe. The jet branch pipe is equipped with a jet tank outlet valve.

[0023] Furthermore, a pressure regulating valve is installed on the compressed air purge pipe behind the flow meter to control the pressure of the compressed air entering the top-blown furnace to not exceed the set value, ensuring a stable negative pressure inside the furnace, or / and an inlet pressure detector is provided on the air inlet side of the compressed air purge pipe.

[0024] The present invention discloses a method for blowing tin fumes in a closed-loop fully automatic blowing system for top-blown furnaces, comprising the following steps:

[0025] S1. Set the corresponding production parameters on the control cabinet;

[0026] S2. The control cabinet controls the spray gun to move to the first position, and the system starts to execute the purging step: the purging unit is opened and purifies the inner cavity of the spray pipe and the inside of the top-blown furnace, in order to clean the debris in the spray pipe to ensure smooth dust transportation, and effectively remove dust and debris inside the top-blown furnace to ensure unobstructed flow inside the top-blown furnace and prevent the accumulation of ash and debris from having an adverse effect on the operation of the top-blown furnace.

[0027] S3. The control cabinet moves the spray gun to the second position, and the system begins to execute the automatic spraying procedure:

[0028] S3.1 The pressure relief section relieves pressure on the tin fume blowing section;

[0029] S3.2 The tin fume receiving section fills the spray can of the tin fume blowing section with tin fume particles. At the same time, the vulcanization section starts to vulcanize the tin fume particles in the tin fume receiving section to prevent the tin fume receiving section from being blocked. When the spray can is filled to the maximum set value, the weight is recorded as the "starting weight".

[0030] S3.3 The sulfurization section sulfurizes the tin fume particles in the injection tank, and at the same time starts the screw feeder to transport the sulfurized tin fume particles through the injection pipe and the spray gun to the top blow furnace for reduction smelting.

[0031] S3.4 When the weight of the injection can is lower than the empty can set value, the screw feeder is stopped. When the pressure of the injection can is lower than the lower limit value, the weight of the injection can at this time is recorded as "end weight". The system starts the filling circulation operation again from S3.2.

[0032] The control cabinet calculates the hourly blowing volume and the total amount of tin fume fed in each shift.

[0033] The formula for calculating the hourly injection volume is: Hourly injection volume = (starting weight - ending weight) / (total number of pulses ÷ resolution), where the total number of pulses is the number of revolutions of the rotary feeder per hour, and the resolution is the frequency of the rotary feeder.

[0034] The frequency of the rotary feeder = (set injection speed / current feeder rotation distance in one revolution) / 60

[0035] Among them, the amount of rotation of the rotary feeder in one revolution is equal to the weight reduction of the injection tank divided by the number of revolutions per minute of the rotary feeder;

[0036] The total amount of tin fume fed per shift = the difference between the "starting weight" and the "ending weight" of the tin fume blowing section for each run of the rotary feeder multiplied by the number of times the rotary feeder runs.

[0037] Furthermore, in S1, based on the actual situation and combined with the on-site data, the corresponding pressure regulating valve is adjusted to the required pressure value. First, the values ​​of the spray volume, the full weight of the spray tank, the empty weight of the spray tank, the high limit pressure of the compressed air purge pipe, and the exhaust flow regulating valve are set. The system control mode is then adjusted to automatic mode, and the system enters the one-button start state according to the operation of the spray gun.

[0038] In S2, the control cabinet monitors the spray gun's operation in real time and issues system purging and spraying commands. When the system detects that the spray gun has moved to the upper limit switch, it begins to execute the purging command.

[0039] The system automatically opens the pipeline purging valve, and the jet flow regulating valve automatically opens to 65% to purge the jet pipeline. The compressed air passes through the constant pressure orifice plate, and its delivery volume is maintained within a constant range before entering the jet pipeline and the top-blown furnace. The pressure detector detects the pressure in the compressed air purging pipe and determines whether the purging is successful based on the pipeline pressure detection value. If the purging is unsuccessful, it is determined that the pipeline is blocked and manual cleaning is performed. If the purging is successful, it is determined whether the spray gun position has reached the lower limit switch.

[0040] In S3, when the spray gun descends to the lower limit switch, the spray flow regulating valve automatically opens to 100% and automatically starts the spray circulation system, first depressurizing the spray tank:

[0041] S3.1, The pressure relief section is activated to relieve pressure:

[0042] The exhaust isolation valve, exhaust ball valve, pressure balance valve, and exhaust flow regulating valve automatically open to 50% to release pressure inside the injection tank.

[0043] S3.2 The tin fumes collected in the tin fume chamber enter the blowing can:

[0044] The control cabinet automatically determines whether the pressure of the injection tank is less than 30 kPa to confirm whether the injection tank has been depressurized. If so, it opens the inlet dome valve and continues to determine whether the weight of the injection tank is lower than the empty tank set value. If so, it opens the outlet dome valve and the silo vulcanization valve, and simultaneously starts the loading timer T1. The tin fumes in the tin fume bin enter the injection tank by gravity. Then, the control cabinet determines whether the weight of the injection tank has reached the maximum set value or whether the tank high material level detection switch has been triggered. If one of the above conditions is activated, the outlet dome valve is closed, and timer T2 is started. When the timer T2 expires, the inlet dome valve is closed, and timer T3 starts counting. When the timer T3 expires, the exhaust ball valve is closed, and after a 1-second delay, the weight at this time is recorded as the "starting weight". The exhaust isolation valve is then closed, and timer T4 starts counting, and the system enters the vulcanization operation.

[0045] S3.3, The vulcanization unit is activated to vulcanize the tin fume particles in the injection can:

[0046] When timer T4 expires, the vulcanization valve of the blow molding can is opened to vulcanize the tin fume inside the blow molding can. The conveying valve and the pressurizing valve are opened to pressurize the blow molding can, and timer T5 starts counting down. When timer T5 expires, it is determined whether the pressure of the blow molding can is greater than the pipeline pressure of the compressed air purging pipe. If so, the outlet valve of the blow molding can is opened, the pressurizing valve is closed, and timer T6 starts counting down. When timer T6 expires, the screw feeder is started to transport the vulcanized tin fume particles in the blow molding can through the blow molding pipe and the blow gun to the top blow furnace for reduction smelting.

[0047] When the dust particles in the injection tank are fed out slowly, the vibrator is activated to vibrate the inner wall of the tank, so that the dust particles attached to the inner wall of the tank can be smoothly fed into the top blower.

[0048] When the pressure of the compressed air purging pipe exceeds the set value, it is determined to be a pipe blockage. The system will automatically stop and trigger the alarm device to remind the operator to clean the pipe.

[0049] S3.4 When the weight of the blown can is lower than the empty can set value, the screw feeder is stopped, timer T7 starts counting, and when the timer T7 expires, the conveying valve and the vulcanizing valve of the blown can are closed, and timer T8 is started at the same time.

[0050] When the T8 timer expires, open the exhaust isolation valve and exhaust ball valve to release pressure;

[0051] When the pressure of the injection tank is lower than the minimum limit, record the weight at this time as the "end weight", and the system enters the packing circulation operation.

[0052] This invention's automatic blowing system, through the installation of a constant-pressure orifice plate, ensures that the blowing air remains within a constant range, meaning the compressed air blown into the blowing pipe is constant. The purpose is that the required compressed air volume is determined by the blowing volume, specifying the appropriate airflow to handle a given amount of fumes. Constant compressed air volume prevents fluctuations, as excessive volume not only affects furnace stirring but also carries away some fumes, while insufficient volume causes fumes to accumulate in the blowing pipe, leading to blockages. Furthermore, the system automatically executes blowing and purging commands based on the nozzle position, ensuring the correspondence between nozzle position and blowing program execution, thus improving the smelting effect of tin fumes in the top-blown furnace. This method also calculates the amount of tin fumes blown, facilitating statistical analysis of material batching to achieve optimal smelting results. Additionally, a pressurization pipe is installed to pressurize the blowing tank, thereby ensuring all tin fumes are fed into the top-blown furnace. Attached Figure Description

[0053] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0054] Figure 1 This utility model provides a structural schematic diagram of a fully automatic, sealed-loop blowing system for tin fume in a top-blown furnace. Detailed Implementation

[0055] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0056] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0058] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0059] This utility model embodiment discloses a fully automatic closed-loop blowing system for tin fume in a top-blown furnace, comprising:

[0060] Tin fume receiving section 1 is used to receive tin fume particles generated by production equipment;

[0061] Tin fume blowing section 2, the top inlet of tin fume blowing section 2 is connected to the bottom outlet of tin fume receiving section 1, and is used to receive tin fume particles discharged from tin fume receiving section 1. The bottom outlet of tin fume blowing section 2 is connected to the inlet of screw feeder 17.

[0062] The pressure relief section 3 is connected to both the tin fume receiving section 1 and the tin fume blowing section 2, and is used to relieve the pressure of the tin fume blowing section 2 through the tin fume receiving section 1.

[0063] The vulcanizing section 4 is connected to both the tin fume receiving section 1 and the tin fume blowing section 2, and is used to vulcanize the tin fume particles in the tin fume receiving section 1 and the tin fume blowing section 2 respectively, so as to prevent the tin fume receiving section 1 and the tin fume blowing section 2 from becoming blocked.

[0064] The purging section 5 is connected to the vulcanizing section 4 and is used to supply compressed air to the vulcanizing section 4.

[0065] The spray gun part 6 can extend into the top blow furnace 38 and can move to a first position and a second position to serve as a trigger condition for starting purging and starting to automatically spray tin fume particles into the top blow furnace 38. The spray gun part 6 is connected to the spray pipe 45. The outlet of the screw feeder 17 and the purging part 5 are both connected to the spray pipe 45. The purging part 5 is provided with a constant pressure orifice plate 20 for supplying a constant amount of compressed air to the spray pipe 45.

[0066] The control cabinet is electrically connected to the tin fume receiving section 1, the tin fume blowing section 2, the pressure relief section 3, the sulfurizing section 4, the purging section 5, and the spray gun section 6, and is used to realize the automatic purging and blowing of fume particles by the system.

[0067] In some embodiments, the spray gun unit 6 includes: a spray gun sliding track 50, a winch 34, an encoder 33, a spray gun 35, an upper limit switch 36, and a lower limit switch 37. The upper limit switch 36 and the lower limit switch 37 are installed on the spray gun sliding track 50. The spray gun 35 is connected to the spray pipe 45. The mounting base of the spray gun 35 is slidably connected to the spray gun sliding track 50. The winch 34 is fixed at the top of the spray gun sliding track 50. The encoder 33 is installed on the shaft of the winch 34. The wire rope on the shaft of the winch 34 is fixedly connected to the mounting base of the spray gun 35. The spray gun 35 is in the first position when it moves to the upper limit switch 36, and in the second position when it moves to the lower limit switch 37.

[0068] The tin fume receiving section 1 includes: a tin fume bin 7 for receiving tin fume particles generated by the production equipment, a bag filter 60, an outlet dome valve 9, and a fume bin sulfidation ring 8. The top of the tin fume bin 7 is connected to the bag filter 60, and the bottom outlet of the tin fume bin 7 is connected to the outlet dome valve 9. The inner wall of the tin fume bin 7 is provided with a fume bin sulfidation ring 8. The outlet dome valve 9 is connected to the top inlet of the tin fume blowing section 2. The sulfidation section 4 is connected to the fume bin sulfidation ring 8 and is used to provide compressed air to the fume bin sulfidation ring 8. The tin fume bin 7 is connected to a pressure relief section 3 and is used to filter and depressurize the air from the tin fume blowing section 2 through the bag filter 60 of the tin fume bin 7.

[0069] The tin fume blowing section 2 includes: a blowing tank 11, an inlet dome valve 10, a main conveying pipe 52, a stamping pipe 56, and a blowing tank vulcanizing ring 15. The top inlet of the blowing tank 11 is connected to the inlet dome valve 10, and the bottom of the outlet dome valve 9 is connected to the top of the inlet dome valve 10 through a rubber hose. The top of the blowing tank 11 is connected to the main conveying pipe 52 and the stamping pipe 56 respectively. The blowing tank vulcanizing ring 15 is provided on the inner wall of the blowing tank 11. The vulcanizing section 4 is connected to the main conveying pipe 52, the stamping pipe 56, and the blowing tank vulcanizing ring 15 to provide compressed air to the blowing tank 11 and the blowing tank vulcanizing ring 15. The main conveying pipe 52 is provided with a conveying valve 12, and the stamping pipe 56 is provided with a stamping valve 54. The blowing tank 11 is connected to the pressure relief section 3 to filter and depressurize the air of the blowing tank 11 through the bag dust collector 60 of the tin fume chamber 7.

[0070] The blow molding tank 11 is equipped with a high material level detection switch 13 and / or a weighing instrument 14, and the tin fume hopper 7 and / or the blow molding tank 11 are equipped with a vibrator 16.

[0071] The pressure relief section 3 includes a pressure relief branch pipe 47, an exhaust isolation valve 26, a pressure balancing valve 27, an exhaust flow regulating valve 28, an exhaust ball valve 29, and a pressure relief pipe 46;

[0072] The two ends of the pressure relief pipe 46 are connected to the top inner cavity of the tin fume dust chamber 7 and the blow-off can 11, respectively. One end of the pressure relief branch pipe 47 is connected to the bottom inner cavity of the tin fume dust chamber 7, and the other end is connected to the inner cavity of the pressure relief pipe 46 through the fifth three-way pipe 43. The pressure balance valve 27 is installed on the pressure relief branch pipe 47.

[0073] The exhaust isolation valve 26 is installed on the pressure relief pipe 46 between the tin fume dust chamber 7 and the fifth three-way pipe 43; the exhaust flow regulating valve 28 and the exhaust ball valve 29 of the injection tank are installed sequentially from top to bottom on the pressure relief pipe 46 between the fifth three-way pipe 43 and the injection tank 11.

[0074] Vulcanizing section 4 includes: a vulcanizing pipe 44, a first vulcanizing branch pipe 51, and a second vulcanizing branch pipe 53. One end of the vulcanizing pipe 44 is connected to the purging section 5, and the other end is connected to the first port of the first tee pipe 40. The second port of the first tee pipe 40 is connected to one end of the first vulcanizing branch pipe 51, and the third port of the first tee pipe 40 is connected to one end of the second vulcanizing branch pipe 53. The first vulcanizing branch pipe 51 is connected to the main conveying pipe 52 and the stamping pipe 56 respectively via the second tee pipe 39 and the sixth... The three-way pipes 55 are connected in parallel. The other end of the first vulcanizing branch pipe 51 is connected to the vulcanizing ring 8 of the dust silo, and the other end of the second vulcanizing branch pipe 53 is connected to the vulcanizing ring 15 of the injection tank. The vulcanizing pipe 44 is equipped with a main conveying pressure regulating valve 31. The first vulcanizing branch pipe 51 is equipped with a silo vulcanizing valve 30 located between the sixth three-way pipe 55 and the dust silo vulcanizing ring 8. The second vulcanizing branch pipe 53 is equipped with an injection tank vulcanizing valve 19 located between the first three-way pipe 40 and the injection tank vulcanizing ring 15.

[0075] The purging unit 5 includes a compressed air purging pipe 49, which is connected to one end of the vulcanizing pipe 44 via a third tee pipe 41. A flow meter 21, a pipeline purging valve 23, a jet flow regulating valve 24, a constant pressure orifice plate 20, and a pressure meter 25 are sequentially installed on the pipe from the third tee pipe 41 at the inlet end to the fourth tee pipe 42. The compressed air purging pipe 49 is connected to the jet pipeline 45 and the jet branch pipe 48 connected to the outlet of the screw feeder 17 via the fourth tee pipe 42. The jet branch pipe 48 is equipped with a jet tank outlet valve 18.

[0076] A pressure regulating valve 22 is installed on the compressed air purge pipe 49 behind the flow meter 21 to control the pressure of the compressed air entering the top blow furnace 38 to not exceed the set value, so as to ensure the stable negative pressure environment inside the furnace. Or / and an inlet pressure meter 32 is provided on the air inlet side of the compressed air purge pipe 49.

[0077] In some embodiments, the main delivery pipe 52, the second vulcanizing branch pipe 53, the stamping pipe 56, and the spray can 11 are all connected by rubber flexible connections. The spray branch pipe 48 and the fourth tee pipe 42 are also connected by rubber hoses. This avoids the problem of excessive noise pollution caused by the vibration of the spray can causing the main delivery pipe 52, the second vulcanizing branch pipe 53, the stamping pipe 56, and the spray branch pipe 48 to vibrate together due to the vibration of the rapper.

[0078] This utility model provides a method for blowing tin fume in a closed-loop fully automatic blowing system for top-blown furnaces, comprising the following steps:

[0079] S1. Set the corresponding production parameters on the control cabinet;

[0080] S2. The control cabinet controls the spray gun 6 to move to the first position, and the system starts to execute the purging step: the purging unit 5 is opened and purifies the inner cavity of the spray pipe 45 and the inside of the top-blown furnace 38 to clean the debris in the spray pipe 45 to ensure smooth dust transportation, and effectively remove dust and debris inside the top-blown furnace 38 to ensure unobstructed flow inside the top-blown furnace 38 and prevent the accumulation of ash and debris from having an adverse effect on the operation of the top-blown furnace 38.

[0081] S3. The control cabinet moves the spray gun unit 6 to the second position, and the system begins to execute the automatic spraying procedure:

[0082] S3.1, The pressure relief section 3 relieves the pressure on the tin fume blowing section 2;

[0083] S3.2 The tin fume receiving section 1 fills the blowing can 11 of the tin fume blowing section 2 with tin fume particles. At the same time, the vulcanizing section 4 starts to vulcanize the tin fume particles in the tin fume receiving section 1 to prevent the tin fume receiving section 1 from being blocked. When the blowing can 11 is filled to the maximum set value, the weight is recorded as the "starting weight".

[0084] S3.3, the sulfurization section 4 sulfurizes the tin fume particles in the blowing tank 11, and at the same time starts the screw feeder 17 to transport the sulfurized tin fume particles through the blowing pipe 45 and the spray gun section 6 to the top blowing furnace 38 for reduction smelting.

[0085] S3.4 When the weight of the injection tank 11 is lower than the empty tank set value, the screw feeder 17 is stopped. When the pressure of the injection tank 11 is lower than the lower limit value, the weight of the injection tank 11 at this time is recorded as the "end weight". The system starts the filling circulation operation again from S3.2.

[0086] The control cabinet calculates the hourly blowing volume and the total amount of tin fume fed in each shift.

[0087] The formula for calculating the hourly injection volume is: Hourly injection volume = Starting weight - Ending weight / (Total number of pulses ÷ Resolution), where the total number of pulses is the number of revolutions of the rotary feeder per hour, and the resolution is the frequency of the rotary feeder.

[0088] The frequency of the rotary feeder = set blowing speed / amount of rotation of the feeder in one revolution / 60

[0089] The amount of rotation of the rotary feeder in one revolution is equal to the weight reduction of the blow tank 11 divided by the number of revolutions per minute of the rotary feeder; the purpose of calculating the frequency is to output it to the rotary feeder so that it can operate at this frequency to ensure the smelting process's demand for tin fume.

[0090] The total amount of tin fume fed per shift = the difference between the "starting weight" and the "ending weight" of the tin fume blowing section 2 for each run of the rotary feeder multiplied by the number of times the rotary feeder runs.

[0091] In step S1 above, based on the actual situation and combined with the on-site data, the corresponding pressure regulating valve is adjusted to the required pressure value. First, the values ​​of the spray volume, the full weight of the spray tank 11, the empty weight of the spray tank 11, the high limit pressure of the compressed air purge pipe 49, and the exhaust flow regulating valve 28 are set. The control mode of the system is then adjusted to automatic mode, and the system enters the one-button start state according to the operation of the spray gun 35.

[0092] In S2, the control cabinet monitors the operation of the spray gun 35 in real time and issues system purging and spraying commands. When the system detects that the spray gun 35 has moved to the upper limit switch 36, it starts to execute the purging command:

[0093] The system automatically opens the pipeline purging valve 23, and the jet flow regulating valve 24 automatically opens to 65% to purge the jet pipeline 45. The compressed air, after passing through the constant pressure orifice plate 20, maintains its delivery rate within a constant range and enters the jet pipeline 45 and the top-blown furnace 38. The pressure detector 25 detects the pressure in the compressed air purging pipe 49 and determines whether the purging is successful based on the pipeline pressure detection value. If the purging is unsuccessful, it is determined that the pipeline is blocked and manual cleaning is performed. If the purging is successful, it is determined whether the position of the spray gun 35 has reached the lower limit switch 37.

[0094] In S3, when the spray gun 35 descends to the lower limit switch 37, the spray flow regulating valve 24 automatically opens to 100% and automatically starts the spray circulation system, first depressurizing the spray tank:

[0095] S3.1, Pressure relief section 3 is activated to relieve pressure:

[0096] The exhaust isolation valve 26, exhaust ball valve 29, pressure balance valve 27, and exhaust flow regulating valve 28 are automatically opened to 50% to release the pressure inside the spray tank 11;

[0097] S3.2, The tin fume collected in the tin fume bin 7 enters the blow-off can 11:

[0098] The control cabinet automatically determines whether the pressure of the injection tank 11 is less than 30 kPa to determine whether the injection tank 11 has been depressurized. If so, the inlet dome valve 10 is opened, and the weight of the injection tank 11 is determined to be lower than the empty tank set value. If so, the outlet dome valve 9 and the silo vulcanization valve 30 are opened, and the loading timer T1 is started at the same time. The tin fume in the tin fume bin 7 enters the injection tank 11 by gravity. In addition, the air blown out by the fume bin vulcanization ring (8) blows the fume particles in the tin fume bin 7 to make them easier to discharge and prevent blockage. After that, the control cabinet determines whether the weight of the injection tank 11 has reached the maximum set value or whether the tank high material level detection switch 13 has been triggered. If one of the above conditions is activated, the outlet dome valve 9 is closed, and the timer T2 is started at the same time. When the timer T2 expires, the inlet dome valve 10 is closed, and the timer T3 starts counting. When the timer T3 expires, the exhaust ball valve 29 is closed, and the weight at this time is recorded as the "starting weight" after a delay of 1 second. The exhaust isolation valve 26 is closed, and the timer T4 starts counting. The system enters the vulcanization operation.

[0099] S3.3, The vulcanization section is activated to vulcanize the tin fume particles in the injection tank 11:

[0100] When timer T4 expires, the vulcanization valve 19 of the blow-through can is opened. The air blown out through the vulcanization pipe 15 of the blow-through can loosens the tin fume particles in the blow-through can 11, making it easier to discharge and preventing blockage. The conveying valve 12 and the pressure valve 54 are opened to pressurize the blow-through can 11, and timer T5 starts counting. When timer T5 expires, it is determined whether the pressure of the blow-through can 11 is greater than the pipeline pressure of the compressed air purging pipe 49. If so, the outlet valve 18 of the blow-through can is opened, the pressure valve 54 is closed, and timer T6 starts counting. When timer T6 expires, the screw feeder 17 is started to transport the vulcanized tin fume particles in the blow-through can 11 through the blow-through pipe 45 and the spray gun section 6 to the top-blown furnace for reduction smelting.

[0101] When the dust particles in the spray tank 11 are fed out slowly, the vibrator 16 is activated to vibrate the inner wall of the tank, so that the dust particles attached to the inner wall of the tank can be smoothly fed into the top blower.

[0102] When the pressure of the compressed air purge pipe 49 is higher than the set value, it is determined that the pipe is blocked. The system will automatically stop and trigger the alarm device to remind the operator to clean the pipe.

[0103] S3.4 When the weight of the blown can 11 is lower than the empty can set value, the screw feeder 17 is stopped, the timer T7 starts counting, and when the timer T7 expires, the conveying valve 12 and the blown can vulcanizing valve 19 are closed, and the timer T8 is started at the same time.

[0104] When the T8 timer expires, open the exhaust isolation valve 26 and the exhaust ball valve 29 to release pressure;

[0105] When the pressure in the injection tank 11 is lower than the minimum limit, the weight at this time is recorded as the "end weight", and the system enters the packing circulation operation.

[0106] The control cabinet of this utility model utilizes a PLC control system to collect and set initial data and execute automatic control operations. When the spray gun reaches the upper limit, a purging operation is initiated to purge the spray pipe. When the spray gun reaches the lower limit, a spraying operation is initiated to feed tin fumes into the top-blown furnace. When the weight of tin fumes in the spray can is lower than the set weight of the empty can, the loading operation begins, and a depressurization operation is performed simultaneously. During the loading period, the can vulcanization and the spraying operation into the top-blown furnace are stopped. After loading is completed, the tin fumes in the feeding can are vulcanized through the vulcanization section, and tin fumes particles are sprayed into the top-blown furnace for reduction melting.

[0107] This utility model system automatically starts the blowing system according to the crude tin smelting situation in the top-blown furnace; during the start-up process, each execution system executes according to the set conditions, and the whole process realizes one-click automatic control, which greatly reduces manual intervention and improves production efficiency, highlighting the process control highlights in the global crude tin smelting industry.

[0108] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section.

[0109] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A closed automatic injection system for tin fume of top-blown furnace, characterized in that, include: Tin fume receiving section (1) is used to receive tin fume particles generated by production equipment; Tin fume blowing section (2), the top inlet of the tin fume blowing section (2) is connected to the bottom outlet of the tin fume receiving section (1) for receiving the tin fume particles discharged from the tin fume receiving section (1), and the bottom outlet of the tin fume blowing section (2) is connected to the inlet of the screw feeder (17). Pressure relief section (3), which is connected to both the tin fume receiving section (1) and the tin fume blowing section (2), is used to relieve the pressure of the tin fume blowing section (2) through the tin fume receiving section (1) via the pressure relief section (3); The vulcanizing section (4) is connected to both the tin fume receiving section (1) and the tin fume blowing section (2), and is used to vulcanize the tin fume particles in the tin fume receiving section (1) and the tin fume blowing section (2) respectively, so as to prevent the tin fume receiving section (1) and the tin fume blowing section (2) from becoming blocked. A purging section (5) is connected to the vulcanizing section (4) and is used to supply compressed air to the vulcanizing section (4); The spray gun (6) can extend into the top-blown furnace (38) and can be moved to a first position and a second position to serve as a trigger condition for starting purging and automatically spraying tin fume particles into the top-blown furnace (38). The spray gun (6) is connected to a spray pipe (45). The outlet of the screw feeder (17) and the purging part (5) are both connected to the spray pipe (45). The purging part (5) is provided with a constant pressure orifice plate (20) for conveying a constant amount of compressed air to the spray pipe (45). The control cabinet is electrically connected to the tin fume receiving part (1), the tin fume blowing part (2), the pressure relief part (3), the sulfidation part (4), the purging part (5), and the spray gun part (6) to realize the automatic purging and blowing of fume particles of the system.

2. A closed type fully automatic injection system for tin fume of a top-blown converter according to claim 1, wherein The spray gun unit (6) includes: a spray gun sliding track (50), a winch (34), an encoder (33), a spray gun (35), an upper limit switch (36), and a lower limit switch (37). The upper limit switch (36) and the lower limit switch (37) are installed on the spray gun sliding track (50). The spray gun (35) is connected to the spray pipe (45). The mounting base of the spray gun (35) is slidably connected to the spray gun sliding track (50). The winch (34) is fixed at the top of the spray gun sliding track (50). The encoder (33) is installed on the shaft of the winch (34). The wire rope on the shaft of the winch (34) is fixedly connected to the mounting base of the spray gun (35). The spray gun (35) moves to the upper limit switch (36) as the first position, and the spray gun (35) moves to the lower limit switch (37) as the second position.

3. A closed type fully automatic injection system for tin fume of a top-blown converter according to claim 1, characterized in that, The tin fume receiving part (1) includes: a tin fume bin (7) for receiving tin fume particles generated by the production equipment, a bag filter (60), an outlet dome valve (9), and a fume bin sulfidation ring (8). The top of the tin fume bin (7) is connected to the bag filter (60), and the bottom outlet of the tin fume bin (7) is connected to the outlet dome valve (9). The inner wall of the tin fume bin (7) is provided with the fume bin sulfidation ring (8). 8) The outlet dome valve (9) is connected to the top inlet of the tin fume blowing section (2), the vulcanizing section (4) is connected to the vulcanizing ring (8) of the fume chamber, and is used to provide compressed air to the vulcanizing ring (8) of the fume chamber. The tin fume chamber (7) is connected to the pressure relief section (3), and is used to filter and depressurize the air of the tin fume blowing section (2) through the bag filter (60) of the tin fume chamber (7) via the pressure relief section (3).

4. A closed type fully automatic injection system for tin fume of a top-blown converter according to claim 3, wherein The tin fume blowing unit (2) includes: a blowing tank (11), an inlet dome valve (10), a main conveying pipe (52), a stamping pipe (56), and a blowing tank vulcanizing ring (15). The top inlet of the blowing tank (11) is connected to the inlet dome valve (10). The bottom of the outlet dome valve (9) is connected to the top of the inlet dome valve (10) through a rubber hose. The top of the blowing tank (11) is connected to the main conveying pipe (52) and the stamping pipe (56). The blowing tank vulcanizing ring (15) is provided on the inner wall of the blowing tank (11). The vulcanizing section (4) is connected to the main conveying pipe (52), the stamping pipe (56), and the vulcanizing ring (15) of the injection tank, and is used to provide compressed air to the injection tank (11) and the vulcanizing ring (15). The main conveying pipe (52) is provided with a conveying valve (12), and the stamping pipe (56) is provided with a stamping valve (54). The injection tank (11) is connected to the pressure relief section (3), and is used to filter and depressurize the air of the injection tank (11) through the bag dust collector (60) of the tin fume chamber (7) through the pressure relief section (3). The blow tank (11) is equipped with a high material level detection switch (13) and / or a weighing instrument (14), and the tin fume chamber (7) and / or the blow tank (11) are equipped with a vibrator (16).

5. A closed type fully automatic injection system for tin fume of a top-blown converter according to claim 4, wherein The pressure relief section (3) includes a pressure relief branch pipe (47), an exhaust isolation valve (26), a pressure balancing valve (27), an exhaust flow regulating valve (28), an exhaust ball valve (29), and a pressure relief pipe (46); The two ends of the pressure relief pipe (46) are respectively connected to the top inner cavity of the tin fume chamber (7) and the spray can (11). One end of the pressure relief branch pipe (47) is connected to the bottom inner cavity of the tin fume chamber (7), and the other end is connected to the inner cavity of the pressure relief pipe (46) through the fifth three-way pipe (43). The pressure balance valve (27) is installed on the pressure relief branch pipe (47). The exhaust isolation valve (26) is installed on the pressure relief pipe (46) between the tin fume chamber (7) and the fifth three-way pipe (43); the exhaust flow regulating valve (28) and the exhaust ball valve (29) of the injection tank are installed sequentially from top to bottom on the pressure relief pipe (46) between the fifth three-way pipe (43) and the injection tank (11).

6. A closed type fully automatic injection system for tin fume of a top-blown converter according to claim 4, wherein The vulcanizing section (4) includes: a vulcanizing pipe (44), a first vulcanizing branch pipe (51), and a second vulcanizing branch pipe (53). One end of the vulcanizing pipe (44) is connected to the purging section (5), and the other end is connected to the first port of the first tee pipe (40). The second port of the first tee pipe (40) is connected to one end of the first vulcanizing branch pipe (51), and the third port of the first tee pipe (40) is connected to one end of the second vulcanizing branch pipe (53). The first vulcanizing branch pipe (51) is connected to the main conveying pipe (52) and the stamping pipe (56) respectively via the second tee pipe (39) and the sixth... The three-way pipes (55) are connected in parallel. The other end of the first vulcanizing branch pipe (51) is connected to the vulcanizing ring (8) of the dust silo, and the other end of the second vulcanizing branch pipe (53) is connected to the vulcanizing ring (15) of the injection tank. The vulcanizing pipe (44) is equipped with a main conveying pressure regulating valve (31). The first vulcanizing branch pipe (51) is equipped with a silo vulcanizing valve (30) located between the sixth three-way pipe (55) and the dust silo vulcanizing ring (8). The second vulcanizing branch pipe (53) is equipped with an injection tank vulcanizing valve (19) located between the first three-way pipe (40) and the injection tank vulcanizing ring (15).

7. A closed type fully automatic injection system for tin fume of a top-blown converter according to claim 6, wherein The purging unit (5) includes a compressed air purging pipe (49), which is connected to one end of the vulcanizing pipe (44) through a third tee pipe (41). A flow meter (21), a pipeline purging valve (23), a jet flow regulating valve (24), the constant pressure orifice plate (20), and a pressure meter (25) are sequentially installed on the pipeline from the third tee pipe (41) at the inlet end to the fourth tee pipe (42). The compressed air purging pipe (49) is connected to the jet pipeline (45) and the jet branch pipe (48) connected to the outlet of the screw feeder (17) through the fourth tee pipe (42). The jet branch pipe (48) is equipped with a jet tank outlet valve (18).

8. A closed type fully automatic injection system for tin fume of a top-blown converter according to claim 7, wherein A pressure regulating valve (22) is installed on the compressed air purge pipe (49) behind the flow meter (21) to control the pressure of the compressed air entering the top blow furnace (38) to not exceed the set value, so as to ensure a stable negative pressure in the furnace, or / and an air inlet pressure meter (32) is provided on the air inlet side of the compressed air purge pipe (49).

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