Tin smelting top-blowing furnace smoke closed circulation treatment device

Abstract

The utility model discloses a closed circulating treatment device and method for smoke dust of a tin smelting top-blown furnace, and belongs to the technical field of non-ferrous metal smelting methods. The device comprises a smelting top-blowing furnace, a top-blowing furnace spray gun, a top-blowing furnace uptake flue, a waste heat boiler, an electric dust collector, a first smoke dust storage bin, a smoke dust pressure conveying bin, a second smoke dust storage bin, a disc granulator and a furnace top smoke dust receiving and blowing integrated bin. Smoke dust collected in the waste heat boiler and the electric dust collector of the equipment of the top-blown furnace is cooled and then passes through the first smoke dust storage bin, the smoke dust pressure conveying bin, the furnace top smoke dust receiving and blowing integrated bin and the like, closed conveying of the smoke dust of the top-blown furnace is completed, finally smelting treatment is carried out in the top-blown furnace, and slag and crude tin are produced. And internal closed circulating treatment of the smoke dust of the tin smelting top-blowing furnace is realized. According to the tin smelting furnace, residual heat of smoke dust is used for smelting, the energy-saving effect is achieved, and the problems of environmental pollution and material loss caused by leakage or splashing of smoke dust produced in traditional tin smelting in the transferring process are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of non-ferrous metal metallurgy, and particularly relates to a closed-loop treatment device for top-blown furnace fumes in tin smelting. Background Art

[0002] In the traditional process of producing crude tin by reducing and smelting tin concentrate or secondary tin-containing materials, no matter whether the top-blown furnace smelting or electric furnace smelting method is adopted, fumes will be produced during the smelting process. After the fumes produced in the smelting industry are captured, they are transported by tanker trucks (or box trucks). Inevitably, fumes will leak and fly during this process, polluting the environment and causing material losses. After the fumes are transported to the raw material bin by truck and cooled naturally, the originally hot fumes are cooled to room temperature. Then, the fumes are sent to the smelting furnace for re-smelting treatment through the belt system batching. During this process, the fumes are heated from room temperature to the smelting temperature of 1200-1300°C again with other materials, and need to absorb the high-temperature energy released by the smelting energy again.

[0003] Therefore, providing a device and method for closed-loop treatment of top-blown furnace fumes in tin smelting, making full use of the heat carried by the fumes for smelting, and solving the problems of fume leakage and material loss caused by the existing traditional transportation, are technical problems that need to be solved urgently by those skilled in the art. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the above technical problems in the prior art to a certain extent.

[0005] To this end, an object of the utility model is to provide a closed-loop treatment device for top-blown furnace fumes in tin smelting, including a smelting top-blown furnace, a top-blown furnace lance, a top-blown furnace upcomer, a waste heat boiler, an electrostatic precipitator, a first fume storage bin, a fume pressure conveying bin, a second fume storage bin, a disc granulator, and a fume receiving and injecting integrated bin on the furnace top;

[0006] One end of the top-blown furnace upcomer is communicated with the top of the smelting top-blown furnace, and the other end of the top-blown furnace upcomer is communicated with the side of the waste heat boiler;

[0007] The other side of the waste heat boiler is communicated with the electrostatic precipitator;

[0008] The bottom of the waste heat boiler is communicated with the top of the first fume storage bin; the bottom of the electrostatic precipitator is communicated with the top of the first fume storage bin;

[0009] The bottom of the first fume storage bin is communicated with the top of the fume pressure conveying bin, and the bottom of the first fume storage bin is also communicated with the top of the second fume storage bin;

[0010] The bottom of the second soot storage bin is connected to the disc granulator;

[0011] The upper part of the smelting top-blown furnace is provided with a feed inlet, and the feed inlet is fed through the top belt of the furnace.

[0012] The lower part of the top-blown furnace lance is inserted into the smelting top-blown furnace, and the upper part of the top-blown furnace lance remains outside the smelting top-blown furnace; the upper part of the top-blown furnace lance is connected to the bottom of the top-furnace soot receiving and blowing integrated bin;

[0013] The top of the top-furnace soot receiving and blowing integrated bin is connected to the bottom of the soot pressure conveying bin.

[0014] Preferably, the lower side of the smelting top-blown furnace is provided with a top-blown furnace slag discharge port and a top-blown furnace crude tin discharge port;

[0015] The top-blown furnace slag discharge port is located above the top-blown furnace crude tin discharge port.

[0016] The beneficial effect of adopting the above preferred scheme is as follows: the above scheme can realize that the soot self-produced by the tin smelting top-blown furnace is completely sealed and returned to the top-furnace soot bin, and then realize the whole process of returning the soot to the tin smelting top-blown furnace for smelting, avoiding the traditional open method of transporting soot by truck, etc., thus avoiding the environmental pollution caused by the leakage during the soot transportation process and the harm to the health of workers, and also avoiding the leakage loss of soot, and improving the comprehensive smelting recovery rate.

[0017] Preferably, the bottom of the waste heat boiler is provided with a waste heat boiler bottom scraper, and the waste heat boiler bottom scraper is connected to the top of the first soot storage bin;

[0018] The bottom of the electrostatic precipitator is provided with an electrostatic precipitator bottom scraper, and the electrostatic precipitator bottom scraper is connected to the top of the first soot storage bin.

[0019] The beneficial effect of adopting the above preferred scheme is as follows: the above scheme can ensure the smooth transportation of soot and improve the soot treatment efficiency.

[0020] Preferably, the soot pressure conveying bin includes a soot pressure conveying bin body, a compressed air storage tank, and a compressed air dryer;

[0021] Among them, the top of the soot pressure conveying bin body is provided with a soot pressure conveying bin dome valve, and the soot pressure conveying bin dome valve is connected to the bottom of the first soot storage bin;

[0022] The bottom of the soot pressure conveying bin body is provided with a soot pressure conveying bin bottom transfer pump, and the soot pressure conveying bin bottom transfer pump is connected to the top of the top-furnace soot receiving and blowing integrated bin through a soot pressure conveying bin purge compressed air pipe;

[0023] One side of the upper part of the dust pressure conveying bin body is communicated with the compressed air storage tank through the dust pressure conveying bin pressurizing air duct; one side of the lower part of the dust pressure conveying bin body is communicated with the compressed air storage tank through the dust pressure conveying bin fluidizing air duct;

[0024] The compressed air storage tank is communicated with one side of the compressed air dryer, and a total intake compressed air duct is arranged on the other side of the compressed air dryer.

[0025] The beneficial effect of adopting the above preferred scheme is that: in the present utility model, the above scheme can ensure that the compressed air has a lower moisture content, can ensure the smooth and continuous conveying of dust, and avoid the dust from absorbing water and getting damp and adhering to the conveying pipe wall, resulting in the blockage of the conveying pipeline.

[0026] Preferably, the top blowing furnace dust receiving and injecting integrated bin includes a bin body and a top blowing furnace dust receiving and injecting integrated bin compressed air duct;

[0027] Wherein, a jet pump is arranged at the bottom of the bin body, and the jet pump is communicated with the upper part of the top blowing furnace lance through the bottom purging air duct of the top blowing furnace dust receiving and injecting integrated bin;

[0028] A dome valve of the top blowing furnace dust receiving and injecting integrated bin is arranged at the top of the bin body, a receiving induced draft fan of the top blowing furnace dust receiving and injecting integrated bin is arranged on the dome valve of the top blowing furnace dust receiving and injecting integrated bin, and the receiving induced draft fan of the top blowing furnace dust receiving and injecting integrated bin is communicated with the bottom conveying pump of the dust pressure conveying bin through the dust pressure conveying bin purging compressed air duct;

[0029] A pressurizing air duct of the top blowing furnace dust receiving and injecting integrated bin is arranged at the upper part of the bin body, and the pressurizing air duct of the top blowing furnace dust receiving and injecting integrated bin is communicated with the compressed air duct of the top blowing furnace dust receiving and injecting integrated bin;

[0030] A fluidizing air duct of the top blowing furnace dust receiving and injecting integrated bin is arranged at the lower part of the bin body, and the fluidizing air duct of the top blowing furnace dust receiving and injecting integrated bin is communicated with the compressed air duct of the top blowing furnace dust receiving and injecting integrated bin.

[0031] The beneficial effect of adopting the above preferred scheme is that: the above scheme of the present utility model can cooperate with the dust pressure conveying bin to complete the efficient treatment of dust and realize the energy recovery and utilization.

[0032] Preferably, it further includes a flue gas sending and sulfuric acid making pipe;

[0033] The flue gas sending and sulfuric acid making pipe is arranged on one side of the electrostatic precipitator.

[0034] The present utility model also provides the above-mentioned top blowing furnace dust closed-loop treatment method for tin smelting, including the following steps:

[0035] (1) During the smelting process of the top-blown furnace for tin smelting, soot is generated. After the soot passes through the up-draft flue of the top-blown furnace, the waste heat boiler, and the electrostatic precipitator, the soot collected in the waste heat boiler and the electrostatic precipitator is collected by the scraper conveyors at the bottoms of the waste heat boiler and the electrostatic precipitator and then sent to the first soot storage bin for storage and cooling. After cooling, it is sent to the soot pressure conveying bin through the screw feeder at the bottom of the first soot storage bin; then, the purge air at the bottom of the soot pressure conveying bin is started for continuous purging;

[0036] (2) After the continuous purging is completed, the top valve of the soot pressure conveying bin is closed, and the compressed air storage tank is started to pressurize the soot pressure conveying bin. At the same time, the fluidizing air at the lower side of the soot pressure conveying bin is started. After the air pressure in the soot pressure conveying bin is stabilized at 100 - 130 kPa, the induced draft fan for receiving and injecting the soot at the furnace top is started, and then the conveying pump at the bottom of the soot pressure conveying bin is started to convey the soot to the receiving and injecting integrated bin for the furnace top soot.

[0037] (3) After the receiving and injecting integrated bin for the furnace top soot has completed receiving, the conveying of the soot pressure conveying bin is closed, the induced draft fan for receiving the furnace top soot is closed, the dome valve of the receiving and injecting integrated bin for the furnace top soot is opened, and the soot is conveyed to the lower part of the receiving and injecting integrated bin for the furnace top soot. After the soot conveying is completed, the dome valve of the receiving and injecting integrated bin for the furnace top soot is closed, the pressurized compressed air and fluidizing air of the receiving and injecting integrated bin for the furnace top soot are opened, and at the same time, the purge air at the bottom of the receiving and injecting integrated bin for the furnace top soot is started;

[0038] (4) After the purge of the receiving and injecting integrated bin for the furnace top soot is completed, the purge is closed. After the air pressure in the receiving and injecting integrated bin for the furnace top soot is stabilized at 100 - 130 kPa, the injection pump is started, and the soot is injected and conveyed into the smelting top-blown furnace through the pipeline and the spray gun pipeline.

[0039] Furthermore, in step (1), the cooling temperature is 100 - 150 °C;

[0040] The pressure of the bottom purge air is 350 - 450 kPa, and the purge time is not less than 5 min.

[0041] The beneficial effect of adopting the above further scheme is that by adopting the above operations of the present utility model, the smooth conveying of the soot can be ensured, and the sundries in the soot conveying pipe can be purged clean; the cooling temperature of 100 - 150 °C is the temperature that the key connecting components of the conveying equipment can accept, and at the same time, it is the reasonable temperature for the soot to smoothly enter the tin smelting top-blown furnace, ensuring that the tin smelting top-blown furnace makes full use of the reasonable waste heat of the soot, thereby achieving energy conservation and emission reduction.

[0042] Furthermore, in step (3), the pressure of the bottom purge air is 350 - 450 kPa, and the purge time is not less than 5 min.

[0043] Furthermore, it further includes step (5):

[0044] When the dust closed conveying system fails, to avoid the impact of dust conveying failure on the smelting process, the second dust storage bin line is started, so that the dust in the first dust storage bin enters the second dust storage bin, and then the dust is granulated by a disk granulator. The granulated dust is sent to the raw material bin for waiting to be processed.

[0045] The beneficial effect of adopting the above further scheme is as follows: The second dust storage bin line is provided in the present utility model, which can effectively prevent faults such as line blockage in the first dust storage bin. Only when the blocked dust opens the circuit, the second dust storage bin line is added, which is only for backup. Adding a dust open circuit line can ensure the smooth production of the top-blown furnace in tin smelting without being affected by the dust open circuit.

[0046] Further, in the present utility model, the proportion of the dust particle size passing through a 60-mesh sieve is more than 90%, the specific gravity is 1.30 - 1.40 t / m 3 , and the moisture content is <1%;

[0047] Even further, the compressed air, purging air, and fluidizing air in the present utility model and the embodiments are all compressed air from the main air supply system. The compressed air of the main air supply system is compressed air after drying, with a moisture content of <1% and a pressure stable within 600 - 700 kPa.

[0048] The beneficial effects of the present utility model are as follows:

[0049] (1) In the scheme of the present utility model, the dust produced by the top-blown furnace system in tin smelting is hermetically collected and hermetically conveyed within the whole system, without any leakage and personnel contact, avoiding the leakage and loss in the traditional loading and transportation process.

[0050] (2) The present utility model reduces the dust temperature to within 100 - 150 °C, and then conveys it to the integrated dust receiving and spraying bin on the furnace top to complete the smelting treatment in the top-blown furnace, making full use of the waste heat of the dust, having an energy-saving effect and creating benefits.

[0051] (3) The present utility model also solves the problem of the need for water granulation after the traditional dust returns to the raw material bin, reducing the water content in the smelting process and the moisture in the materials, and avoiding the treatment cost of bringing into the smelting wastewater system. Description of the Drawings

[0052] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0053] Figure 1 The accompanying drawing is a schematic structural diagram of a closed-loop treatment device for top-blown furnace soot in the tin smelting of the present utility model.

[0054] In the accompanying drawing, the structures represented by the reference numerals are listed as follows: 1 - top-blown smelting furnace, 2 - furnace-top belt for feeding, 3 - feed inlet, 4 - top-blown furnace lance, 5 - up-rise flue of top-blown furnace, 6 - waste heat boiler, 7 - electrostatic precipitator, 8 - first soot storage bin, 9 - soot pressure conveying bin, 10 - second soot storage bin, 11 - disc pelletizer, 12 - integrated furnace-top soot receiving and spraying bin, 13 - flue gas pipe for acid making;

[0055] 101 - slag discharge port of top-blown furnace, 102 - crude tin discharge port of top-blown furnace, 601 - bottom scraper of waste heat boiler, 701 - bottom scraper of electrostatic precipitator;

[0056] 91 - body of soot pressure conveying bin, 911 - round top valve of soot pressure conveying bin, 912 - bottom conveying pump of soot pressure conveying bin, 913 - purging compressed air pipe of soot pressure conveying bin, 914 - boosting air pipe of soot pressure conveying bin, 915 - fluidizing air pipe of soot pressure conveying bin, 916 - compressed air storage tank, 917 - compressed air dryer, 918 - total intake compressed air pipe;

[0057] 121 - jet pump, 122 - bottom purging air pipe of integrated furnace-top soot receiving and spraying bin, 123 - receiving induced draft fan of integrated furnace-top soot receiving and spraying bin, 124 - compressed air pipe of integrated furnace-top soot receiving and spraying bin, 125 - boosting air pipe of integrated furnace-top soot receiving and spraying bin, 126 - fluidizing air pipe of integrated furnace-top soot receiving and spraying bin, 127 - round top valve of integrated furnace-top soot receiving and spraying bin, Detailed implementation manners

[0058] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0059] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0060] In addition, 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 quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more, unless otherwise specifically defined.

[0061] In the present utility model, unless otherwise clearly specified and defined, the terms such as "mounted", "connected", "connected to", "fixed" and the like should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0062] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "above the top of" and "on the top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below the bottom of" and "under the bottom of" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0063] A closed-circuit treatment device for the fume of a top-blown furnace in tin smelting, comprising a smelting top-blown furnace 1, a top-blown furnace lance 4, a top-blown furnace upcomer 5, a waste heat boiler 6, an electrostatic precipitator 7, a first fume storage bin 8, a fume pressure conveying bin 9, a second fume storage bin 10, a disc granulator 11, and a furnace top fume receiving and spraying integrated bin 12;

[0064] One end of the top-blown furnace upcomer 5 is communicated with the top of the smelting top-blown furnace 1, and the other end of the top-blown furnace upcomer 5 is communicated with the side of the waste heat boiler 6;

[0065] The other side of the waste heat boiler 6 is communicated with the electrostatic precipitator 7;

[0066] The bottom of the waste heat boiler 6 is communicated with the top of the first fume storage bin 8; the bottom of the electrostatic precipitator 7 is communicated with the top of the first fume storage bin 8;

[0067] The bottom of the first fume storage bin 8 is communicated with the top of the fume pressure conveying bin 9, and the bottom of the first fume storage bin 8 is also communicated with the top of the second fume storage bin 10;

[0068] The bottom of the second dust storage bin 10 is communicated with the disk granulator 11;

[0069] The upper part of the smelting top-blown furnace 1 is provided with a feed inlet 3, and the feed inlet 3 feeds materials through the top-of-furnace belt 2;

[0070] The lower part of the top-blown furnace lance 4 is inserted into the smelting top-blown furnace 1, and the upper part of the top-blown furnace lance 4 remains outside the smelting top-blown furnace 1; the upper part of the top-blown furnace lance 4 is communicated with the bottom of the top-of-furnace dust receiving and blowing integrated bin 12;

[0071] The top of the top-of-furnace dust receiving and blowing integrated bin 12 is communicated with the bottom of the dust pressure conveying bin 9.

[0072] In some embodiments, the lower side of the smelting top-blown furnace 1 is provided with a top-blown furnace slag discharge port 101 and a top-blown furnace crude tin discharge port 102;

[0073] The top-blown furnace slag discharge port 102 is located above the top-blown furnace crude tin discharge port 102.

[0074] In some embodiments, the bottom of the waste heat boiler 6 is provided with a waste heat boiler bottom scraper 601, and the waste heat boiler bottom scraper 601 is communicated with the top of the first dust storage bin 8;

[0075] The bottom of the electrostatic precipitator 7 is provided with an electrostatic precipitator bottom scraper 701, and the electrostatic precipitator bottom scraper 701 is communicated with the top of the first dust storage bin 8.

[0076] In some embodiments, the dust pressure conveying bin 9 includes a dust pressure conveying bin body 91, a compressed air storage tank 916, and a compressed air dryer 917;

[0077] Among them, the top of the dust pressure conveying bin body 91 is provided with a dust pressure conveying bin dome valve 911, and the dust pressure conveying bin dome valve 911 is communicated with the bottom of the first dust storage bin 8;

[0078] The bottom of the dust pressure conveying bin body 91 is provided with a dust pressure conveying bin bottom transfer pump 912, and the dust pressure conveying bin bottom transfer pump 912 is communicated with the top of the top-of-furnace dust receiving and blowing integrated bin 12 through a dust pressure conveying bin purge compressed air pipe 913;

[0079] One side of the upper part of the dust pressure conveying bin body 91 is communicated with the compressed air storage tank 916 through a dust pressure conveying bin pressurizing air pipe 914; one side of the lower part of the dust pressure conveying bin body 91 is communicated with the compressed air storage tank 916 through a dust pressure conveying bin fluidizing air pipe 915;

[0080] The compressed air storage tank 916 is communicated with one side of the compressed air dryer 917, and the other side of the compressed air dryer 917 is provided with a total intake compressed air pipe 918.

[0081] In some embodiments, the integrated top-smoke receiving and injection bin 12 includes a bin body and a compressed air pipe 124 for the integrated top-smoke receiving and injection bin;

[0082] Wherein, a jet pump 121 is provided at the bottom of the bin body, and the jet pump 121 is communicated with the upper part of the top-blown furnace lance 4 through a bottom purging air pipe 122 of the integrated top-smoke receiving and injection bin;

[0083] A dome valve 127 of the integrated top-smoke receiving and injection bin is provided at the top of the bin body, and a receiving induced draft fan 123 of the integrated top-smoke receiving and injection bin is provided above the dome valve 127 of the integrated top-smoke receiving and injection bin. The receiving induced draft fan 123 of the integrated top-smoke receiving and injection bin is communicated with the bottom delivery pump of the dust pressure conveying bin 9 through a purging compressed air pipe 913 of the dust pressure conveying bin;

[0084] A pressurizing air pipe 125 of the integrated top-smoke receiving and injection bin is provided at the upper part of the bin body, and the pressurizing air pipe 125 of the integrated top-smoke receiving and injection bin is communicated with the compressed air pipe 124 of the integrated top-smoke receiving and injection bin;

[0085] A fluidizing air pipe 126 of the integrated top-smoke receiving and injection bin is provided at the lower part of the bin body, and the fluidizing air pipe 126 of the integrated top-smoke receiving and injection bin is communicated with the compressed air pipe 124 of the integrated top-smoke receiving and injection bin.

[0086] In some embodiments, it further includes a flue gas pipe 13 for sending to sulfuric acid production;

[0087] The flue gas pipe 13 for sending to sulfuric acid production is arranged on one side of the electrostatic precipitator 7.

[0088] A method for treating the top-blown furnace dust in tin smelting in a closed cycle:

[0089] (1) During the smelting process of the top-blown furnace in tin smelting, dust is generated. The dust rises through the upcomer of the top-blown furnace, the waste heat boiler, and the electrostatic precipitator. The dust collected in the waste heat boiler and the electrostatic precipitator is collected by the scraper conveyors at the bottoms of the waste heat boiler and the electrostatic precipitator and then sent to the first dust storage bin for storage and cooling. After cooling to 100 - 150 °C, it is sent into the dust pressure conveying bin through the screw feeder at the bottom of the first dust storage bin; then start the continuous purging of the bottom purging air of the dust pressure conveying bin, and the pressure of the bottom purging air is 350 - 450 kPa, and the purging time is not less than 5 min;

[0090] (2) After the continuous purging is completed, close the top valve of the dust pressure conveying bin, start the compressed air storage tank to pressurize the dust pressure conveying bin, and at the same time start the fluidizing air at the lower side of the dust pressure conveying bin. After the air pressure in the dust pressure conveying bin is stabilized to 100 - 130 kPa, start the receiving induced draft fan of the integrated top-smoke receiving and injection bin, and then start the bottom delivery pump of the dust pressure conveying bin to convey the dust to the integrated top-smoke receiving and injection bin;

[0091] (3) After the integrated bin for receiving and injecting top-furnace soot has completed receiving, shut down the pressure conveying of the soot pressure conveying bin, turn off the induced draft fan for receiving in the integrated bin for receiving and injecting top-furnace soot, open the dome valve of the integrated bin for receiving and injecting top-furnace soot, and convey soot to the lower part of the integrated bin for receiving and injecting top-furnace soot. After the soot conveying is completed, close the dome valve of the integrated bin for receiving and injecting top-furnace soot, turn on the pressurized compressed air and fluidizing air of the integrated bin for receiving and injecting top-furnace soot, and at the same time start the bottom purging air of the integrated bin for receiving and injecting top-furnace soot. The pressure of the bottom purging air is 350 - 450 kPa, and the purging time is not less than 5 minutes.

[0092] (4) After the integrated bin for receiving and injecting top-furnace soot has completed purging, shut down the purging. After the air pressure in the integrated bin for receiving and injecting top-furnace soot has stabilized to 100 - 130 kPa, start the injection pump to inject and convey the soot into the smelting top-blown furnace through the pipeline and the spray gun pipeline.

[0093] (5) When a failure occurs in the soot airtight conveying system, to avoid the impact of the soot conveying failure on the smelting process, start the second soot storage bin line to let the soot in the first soot storage bin enter the second soot storage bin, and then pelletize the soot through the disc pelletizer. The pelletized soot is sent to the raw material bin for waiting to be processed.

[0094] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0095] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. A closed-loop treatment device for top-blown converter fumes in tin smelting, characterized in that, It includes a smelting top-blown furnace, a top-blown furnace lance, a top-blown furnace upcomer, a waste heat boiler, an electrostatic precipitator, a first dust storage bin, a dust pressure conveying bin, a second dust storage bin, a disc granulator, and a top-of-furnace dust receiving and spraying integrated bin; Among them, one end of the top-blown furnace upcomer is connected to the top of the smelting top-blown furnace, and the other end of the top-blown furnace upcomer is connected to the side of the waste heat boiler; The other side of the waste heat boiler is connected to the electrostatic precipitator; The bottom of the waste heat boiler is connected to the top of the first dust storage bin; the bottom of the electrostatic precipitator is connected to the top of the first dust storage bin; The bottom of the first dust storage bin is connected to the top of the dust pressure conveying bin, and the bottom of the first dust storage bin is also connected to the top of the second dust storage bin; The bottom of the second dust storage bin is connected to the disc granulator; The upper part of the smelting top-blown furnace is provided with a feed inlet, and the feed inlet is fed by an in-furnace top belt; The lower part of the top-blown furnace lance is inserted into the smelting top-blown furnace, and the upper part of the top-blown furnace lance remains outside the smelting top-blown furnace; the upper part of the top-blown furnace lance is connected to the bottom of the top-of-furnace dust receiving and spraying integrated bin; The top of the top-of-furnace dust receiving and spraying integrated bin is connected to the bottom of the dust pressure conveying bin.

2. The closed-loop treatment device for the top-blown furnace soot in tin smelting according to claim 1, characterized in that, The lower side of the smelting top-blown furnace is provided with a top-blown furnace slag discharge port and a top-blown furnace crude tin discharge port; The top-blown furnace slag discharge port is located above the top-blown furnace crude tin discharge port.

3. The closed-loop treatment device for top-blown converter fumes in tin smelting according to claim 1, characterized in that, The bottom of the waste heat boiler is provided with a waste heat boiler bottom scraper, and the waste heat boiler bottom scraper is connected to the top of the first dust storage bin; The bottom of the electrostatic precipitator is provided with an electrostatic precipitator bottom scraper, and the electrostatic precipitator bottom scraper is connected to the top of the first dust storage bin.

4. The hermetic circulation treatment device for the top-blown furnace soot in tin smelting according to claim 1, characterized in that, The dust pressure conveying bin includes a dust pressure conveying bin body, a compressed air storage tank, and a compressed air dryer; Among them, the top of the dust pressure conveying bin body is provided with a dust pressure conveying bin dome valve, and the dust pressure conveying bin dome valve is connected to the bottom of the first dust storage bin; The bottom of the dust pressure conveying bin body is provided with a dust pressure conveying bin bottom transfer pump, and the dust pressure conveying bin bottom transfer pump is connected to the top of the top-of-furnace dust receiving and spraying integrated bin through a dust pressure conveying bin purging compressed air pipe; One side of the upper part of the dust pressure conveying bin body is connected to the compressed air storage tank through a dust pressure conveying bin boosting air pipe; one side of the lower part of the dust pressure conveying bin body is connected to the compressed air storage tank through a dust pressure conveying bin fluidizing air pipe; The compressed air storage tank is connected to one side of the compressed air dryer, and the other side of the compressed air dryer is provided with a total intake compressed air pipe.

5. The closed-loop treatment device for the top-blown furnace soot in tin smelting according to claim 1 or 4, characterized in that The top-of-furnace dust receiving and spraying integrated bin includes a bin body and a top-of-furnace dust receiving and spraying integrated bin compressed air pipe; Among them, a jet pump is provided at the bottom of the bin body, and the jet pump is connected to the upper part of the top-blown furnace lance through a top-of-furnace dust receiving and spraying integrated bin bottom purging air pipe; A top of the bin body is provided with a top dome valve of the integrated bin for receiving and injecting furnace top soot. Above the top dome valve of the integrated bin for receiving and injecting furnace top soot, there is a receiving induced draft fan of the integrated bin for receiving and injecting furnace top soot. The receiving induced draft fan of the integrated bin for receiving and injecting furnace top soot is communicated with a bottom transfer pump of the soot pressure transfer bin through the purge compressed air pipe of the soot pressure transfer bin; An upper part of the bin body is provided with a pressurizing air pipe of the integrated bin for receiving and injecting furnace top soot. The pressurizing air pipe of the integrated bin for receiving and injecting furnace top soot is communicated with a compressed air pipe of the integrated bin for receiving and injecting furnace top soot; A lower part of the bin body is provided with a fluidizing air pipe of the integrated bin for receiving and injecting furnace top soot. The fluidizing air pipe of the integrated bin for receiving and injecting furnace top soot is communicated with a compressed air pipe of the integrated bin for receiving and injecting furnace top soot.

6. The hermetic circulation treatment device for the top-blown furnace soot in tin smelting according to claim 1, wherein, It further includes a flue gas pipe for sending to sulfuric acid production; The flue gas pipe for sending to sulfuric acid production is arranged on one side of the electrostatic precipitator.

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