Furnace body of fuming furnace

Abstract

The invention relates to the technical field of fuming furnaces, in particular to a fuming furnace body. Comprising a hearth and a top plate, the top plate is installed on the periphery of the upper surface of the hearth, an annular gas cylinder is connected to the periphery of the inner wall of the upper surface of the top plate, through rings are connected to the two sides of the outer surface of the annular gas cylinder, and communicating pipes are connected to one sides of the surfaces of the through rings; slag placed in the hearth is heated, gas of valuable metal is generated and ascends towards the interior of the top plate, heat conduction pipes are connected to the two sides of the upper surface of the top plate, and part of the gas of the valuable metal is introduced into the communicating pipes through the heat conduction pipes. According to the device, humidified pulverized coal, air and gas of valuable metal can be circulated and reduced in the annular gas cylinder and are finally discharged from the formed gas guiding groove, and the reduced gas of the valuable metal is guided into the collecting chamber, so that the reduced gas of the valuable metal can be conveniently subjected to subsequent processing and purification through the gas guide pipe.

Description

Technical Field

[0001] The invention relates to the technical field of fumigation furnaces, and in particular to a furnace body of a fumigation furnace. Background Art

[0002] A fuming furnace is a device that blows a mixture of air and pulverized coal into liquid slag to volatilize certain valuable metals in the slag in the form of metals, oxides or sulfides.

[0003] At present, the furnace bodies of existing fuming furnaces are mostly formed by heating the slag in the furnace at high temperature to generate valuable metal gas. After the valuable metal gas rises to a certain height inside the fuming furnace, the air nozzle introduces air and pulverized coal into the fuming furnace to mix with the valuable metal gas for reduction. However, in this process, the air and pulverized coal will only collide with the valuable metal gas at random in the fuming furnace for reduction, and the flow directions of the air, pulverized coal and valuable metal gas in the fuming furnace cannot be kept consistent, which easily leads to insufficient contact between the pulverized coal and the valuable metal gas, resulting in incomplete reduction reaction, thereby affecting the reduction efficiency.

[0004] Therefore, there is an urgent need for a fumigation furnace body to solve the problems of the prior art. Summary of the invention

[0005] The object of the present invention is to provide a fumigation furnace body to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides a furnace body of a fumigation furnace, comprising a furnace body, a humidifying mechanism and an airflow guiding mechanism;

[0007] The furnace body includes a heating chamber and a combustion chamber, an airflow guide mechanism is installed on the top of the inner side of the heating chamber, and a humidifying mechanism is installed on the upper surface of the airflow guide mechanism;

[0008] The humidifying mechanism includes a furnace and a top plate, the top plate is installed around the upper surface of the furnace, the inner wall of the upper surface of the top plate is connected with an annular gas cylinder around, through rings are connected on both sides of the outer surface of the annular gas cylinder, and a connecting pipe is connected on one side of the through ring surface. The furnace is used to place slag. When the combustion chamber generates high-temperature heat, the slag placed in the furnace is heated, and valuable metal gas is generated and rises to the inside of the top plate. Heat conducting pipes are connected on both sides of the upper surface of the top plate. The heat conducting pipes introduce part of the valuable metal gas into the connecting pipe. Since the connecting pipe transmits air and pulverized coal, the pulverized coal particles can be humidified during the transmission process in the connecting pipe and finally introduced into the annular gas cylinder.

[0009] The air flow guiding mechanism includes an air entrainment ring, and air entrainment pipes are connected to the four sides of the lower surface of the air entrainment ring. The air entrainment pipes introduce the gas of valuable metals into the interior of the air entrainment ring. As the air and pulverized coal circulate inside the air cylinder through the connecting pipe, the movement trajectory of the air flow causes the gas of valuable metals to circulate and be reduced with the air and pulverized coal inside the air cylinder and the air entrainment ring, and finally be discharged from the ventilation groove.

[0010] As a further improvement of the technical solution, the inner upper surface of the heating chamber is connected to a collecting chamber, a gas duct is connected to the center of the upper surface of the collecting chamber, a bracket is installed at the center of the top inner side of the combustion chamber, and the upper surface of the bracket corresponds vertically to the lower surface of the furnace.

[0011] As a further improvement of this technical solution, an air induction groove is opened on the inner wall surface of the top plate, blowers are installed on both sides of the upper end of the outer surface of the combustion chamber, a connecting pipe is connected to one side of the blower surface, and air nozzles are installed on both sides of the inner wall of the annular cylinder.

[0012] As a further improvement of the present technical solution, an air entraining ring is installed around the inner wall of the lower surface of the top plate, the upper surface of the air entraining ring and the lower surface of the air ring cylinder are correspondingly connected, and a groove is provided at the center of the surface of the air entraining ring. By using the corresponding connection between the groove and the air ring cylinder, the humidified pulverized coal, air and valuable metal gas can be circulated and reduced inside the air ring cylinder.

[0013] As a further improvement of the present technical solution, a total of four top plates are provided, and the four top plates are symmetrically distributed around the upper surface of the furnace. The top plates are installed on the upper surface of the furnace through heat pipes. The length and width of the top plates are larger than the length and width of the furnace. Therefore, the gas of the valuable metals can be introduced into the interior of the top plates, and the gas of the valuable metals is reduced inside the air entraining rings and the ring gas cylinders arranged around the inner wall of the upper surface of the top plates, thereby effectively improving the work efficiency of the gas reduction treatment of the valuable metals.

[0014] As a further improvement of the present technical solution, the heat conduction pipes are symmetrically staggered and distributed on both sides of the upper surface of the top plate. One side of the heat conduction pipe surface is correspondingly connected to the inside of the connecting pipe. The blower transmits air and pulverized coal. The heat conduction pipes heat the inside of the furnace to produce valuable metal gas and transmit it to the inside of the connecting pipe, where it is mixed with the air and pulverized coal and finally transmitted to the inside of the ring gas cylinder by means of a through ring and a wind nozzle.

[0015] As a further improvement of the present technical solution, the through rings are symmetrically staggered and penetrated and clamped on both sides of the outer surface of the annular gas cylinder, and are connected with the wind nozzles correspondingly, and the opening direction of the wind nozzles is parallel to the annular gas cylinder. Therefore, air and pulverized coal can circulate around the inner wall of the annular gas cylinder, and the air and pulverized coal are circulated in the connecting pipe by a blower. One end of the provided heat-conducting pipe connects the connecting pipe and the inside of the top plate correspondingly. After the slag is heated at high temperature in the furnace to produce valuable metal gas, the airflow generated by the circulation of air and pulverized coal in the connecting pipe can be used to introduce part of the valuable metal gas rising from the top plate into the connecting pipe by the heat-conducting pipe, and contact with the pulverized coal. Under the influence of the high-temperature valuable metal gas, the pulverized coal particles are humidified, making the surface of the pulverized coal particles soft, thereby reducing the friction and impact on the connecting pipe, the through ring and the wind nozzle. At the same time, the evaporation of water can make the pulverized coal particles expand, increase the contact area with oxygen, and improve the combustion efficiency.

[0016] As a further improvement of the present technical solution, an air duct runs through the interior of the air ducting ring and is connected with the groove accordingly. The air ducting ring is connected with the interior of the air cylinder via the groove accordingly. The air duct introduces the gas of the valuable metals into the air ducting ring and flows synchronously with the flow direction of the air and pulverized coal in the air cylinder. The air cylinder is used to drive the air and pulverized coal to circulate, and under the action of the air flow, the gas of the valuable metals in the groove and the air ducting ring is driven to move synchronously, so that the gas of the valuable metals, air and pulverized coal can maintain consistency in gas flow during the mixed reduction process, which can effectively improve the work efficiency of gas reduction of the valuable metals.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The length and width of the fuming furnace body are larger than those of the furnace chamber, so the valuable metal gas can be introduced into the top plate, and the valuable metal gas is reduced inside the air entrainment ring and the ring gas cylinder arranged around the inner wall of the upper surface of the top plate, thereby effectively improving the working efficiency of the valuable metal gas reduction treatment.

[0019] 2. The furnace body of the fuming furnace can humidify the pulverized coal by allowing part of the valuable metal gas to contact the pulverized coal inside the connecting pipe, and transmit the humidified pulverized coal and air to the inside of the annular gas cylinder through the through ring and the air nozzle, and circulate inside the annular gas cylinder, thereby reducing the wear of the pulverized coal on the inner wall of the connecting pipe.

[0020] 3. The furnace body of the fumigation furnace generates airflow due to the circulation of humidified pulverized coal and air inside the annular gas cylinder, so that the gas of valuable metals in the groove can circulate synchronously with the airflow, and the groove and the annular gas cylinder are correspondingly connected, so that the humidified pulverized coal, air and valuable metal gas can be circulated and reduced inside the annular gas cylinder, and the subsequent processing and purification of the reduced valuable metal gas can be facilitated. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the furnace body structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the connection structure between the combustion chamber and the bracket of the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the humidification mechanism of the present invention;

[0024] Figure 4 It is a schematic diagram of the connection structure between the top plate and the air guide groove of the present invention;

[0025] Figure 5 It is a schematic diagram of the connection structure of the connecting pipe, the heat conducting pipe and the annular gas cylinder of the present invention;

[0026] Figure 6 It is a schematic diagram of the structure of the airflow guide mechanism of the present invention;

[0027] Figure 7 for Figure 6 A schematic diagram of the enlarged structure at A in the middle;

[0028] Figure 8 It is a schematic diagram of the connection structure of the air ring cylinder and the air entraining ring of the present invention;

[0029] Fig. 9 It is a schematic diagram of the connection structure of the furnace, the air entraining ring, the annular air cylinder and the ventilation groove of the present invention.

[0030] The meaning of each number in the figure is:

[0031] 100, furnace body; 101, heating chamber; 102, collecting chamber; 103, air guide tube; 104, combustion chamber; 105, bracket;

[0032] 200, humidifying mechanism; 202, furnace; 203, top plate; 204, blower; 205, connecting pipe; 206, through ring; 207, heat conducting pipe; 208, annular cylinder; 209, air nozzle; 210, ventilation groove; 211, air inlet groove;

[0033] 300. Air flow guiding mechanism; 301. Air bleed ring; 302. Groove; 303. Air bleed pipe. DETAILED DESCRIPTION

[0034] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figure 1 , Figure 3 and Figure 6 As shown, the purpose of this embodiment is to provide a furnace body of a fumigation furnace, including a furnace body 100, a humidifying mechanism 200 and an airflow guiding mechanism 300;

[0036] The furnace body 100 includes a heating chamber 101 and a combustion chamber 104. An airflow guide mechanism 300 is installed on the top of the inner side of the heating chamber 101. A humidifying mechanism 200 is installed on the upper surface of the airflow guide mechanism 300.

[0037] The humidifying mechanism 200 includes a furnace 202 and a top plate 203. The top plate 203 is installed around the upper surface of the furnace 202. The inner wall of the upper surface of the top plate 203 is connected with a ring gas cylinder 208. The two sides of the outer surface of the ring gas cylinder 208 are connected with a through ring 206. One side of the surface of the through ring 206 is connected with a connecting pipe 205. The furnace 202 is used to place slag. First, some blocky solid fuel is piled in the combustion chamber 104, and it is ignited by an external fire source (such as a torch). When the combustion chamber 104 is heated, the combustion chamber 104 is heated to slag. After the chamber 104 generates high-temperature heat, the slag placed inside the furnace 202 is heated, and valuable metal gas is generated, which rises to the inside of the top plate 203. Heat pipes 207 are connected to both sides of the upper surface of the top plate 203. The heat pipes 207 introduce part of the valuable metal gas into the inside of the connecting pipe 205. Since the inside of the connecting pipe 205 transmits air and pulverized coal, the pulverized coal particles can be humidified during the transmission process inside the connecting pipe 205, and finally introduced into the inside of the annular gas cylinder 208;

[0038] The airflow guide mechanism 300 includes an air entrainment ring 301, and air entrainment pipes 303 are connected to the lower surface of the air entrainment ring 301. The air entrainment pipes 303 introduce the valuable metal gas into the air entrainment ring 301. Since the air and the pulverized coal circulate in the air cylinder 208 through the connecting pipe 205, the valuable metal gas, the air and the pulverized coal circulate and return in the air cylinder 208 and the air entrainment ring 301 according to the movement trajectory of the airflow, and finally are discharged from the ventilation groove 210.

[0039] By heating the slag in the furnace 202 at high temperature, valuable metal gas is generated and rises from above the furnace 202 and along the inner wall of the top plate 203. The heat pipe 207 can absorb part of the valuable metal gas rising from the inner wall of the top plate 203 into the connecting pipe 205. The connecting pipe 205 can transmit air and pulverized coal through the blower 204, and part of the valuable metal gas can contact the pulverized coal inside the connecting pipe 205, which has the effect of humidifying the pulverized coal, effectively reducing the wear intensity of the pulverized coal when being transmitted inside the connecting pipe 205, and the humidified pulverized coal and air are transmitted to the inside of the annular gas cylinder 208 by using the through ring 206 and the air nozzle 209;

[0040] The air duct 303 provided at the same time can absorb the valuable metal gas around the inner wall of the lower surface of the top plate 203 into the groove 302. Since the groove 302 and the annular gas cylinder 208 are correspondingly connected, and the humidified pulverized coal and air circulate inside the annular gas cylinder 208, airflow will be generated. The airflow will drive the valuable metal gas inside the groove 302 to circulate synchronously, and as the gas flows upward, the humidified pulverized coal and air are reduced with the valuable metal gas, and finally transmitted to the inside of the ventilation groove 210, so as to facilitate the subsequent processing and purification of the reduced valuable metal gas.

[0041] Therefore, based on the above structure, combined with Figure 1-Figure 2 The structure of the furnace body 100 is further disclosed as shown, the upper surface of the heating chamber 101 is connected to the collecting chamber 102, the center of the upper surface of the collecting chamber 102 is connected to the air guide pipe 103, and the center of the top of the combustion chamber 104 is installed with a bracket 105, and the upper surface of the bracket 105 is vertically corresponding to the lower surface of the furnace 202;

[0042] Furthermore, a high-temperature flame is formed inside the combustion chamber 104, the furnace 202 is placed on the upper surface of the support 105, the bottom of the furnace 202 is heated by the high-temperature flame, and the temperature inside the combustion chamber 104 is always maintained above 1200° C., the slag inside the furnace 202 is heated at high temperature to form valuable metal gas;

[0043] Based on the above structure, combined with Figure 3-Figure 5 As shown, the structure of the humidifying mechanism 200 is further disclosed, the inner wall surface of the top plate 203 is provided with an air induction groove 211, the upper end of the outer surface of the combustion chamber 104 is provided with a blower 204 on both sides, the connecting pipe 205 is connected to one side of the surface of the blower 204, and the inner wall of the annular cylinder 208 is provided with a tuyere 209 on both sides;

[0044] Furthermore, the air and pulverized coal can be transported to the inside of the connecting pipe 205 by the operation of the blower 204. When the slag in the furnace 202 is heated at high temperature to produce valuable metal gas, the valuable metal gas will rise from the top of the inner side of the furnace 202. Since the heat pipes 207 are symmetrically staggered and distributed on both sides of the upper surface of the top plate 203, the heat pipes 207 can absorb part of the valuable metal gas, and as the air and pulverized coal flow inside the connecting pipe 205, the heat pipes 207 come into contact with the pulverized coal, and introduce the air, pulverized coal and valuable metal gas into the inside of the ring gas cylinder 208 through the through ring 206 and the air nozzle 209.

[0045] The improvement is that: the air and pulverized coal are circulated in the connecting pipe 205 by the blower 204, and one end of the heat conduction pipe 207 is arranged to connect the connecting pipe 205 and the inside of the top plate 203 accordingly. After the furnace 202 heats the slag at a high temperature to generate valuable metal gas, the air flow generated by the circulation of air and pulverized coal in the connecting pipe 205 can be used to introduce part of the valuable metal gas rising from the inside of the top plate 203 into the connecting pipe 205 by the heat conduction pipe 207, so that the gas contacts the pulverized coal. Under the influence of the high-temperature valuable metal gas, the pulverized coal is heated to the inside of the connecting pipe 205. The coal particles have a humidifying effect, making the surface of the pulverized coal particles soft, thereby reducing the friction and impact on the connecting pipe 205, the through ring 206 and the air nozzle 209. At the same time, the evaporation of water can cause the pulverized coal particles to expand, increase the contact area with oxygen, and improve the combustion efficiency. The inner wall of the annular gas cylinder 208 is provided with upwardly concave guide grooves. After the valuable metal gas is reduced in contact with the air and pulverized coal, the reduced valuable metal gas can be introduced into the ventilation groove 210, which is convenient for the subsequent processing and purification of the reduced valuable metal gas.

[0046] Based on the above structure, combined with Figure 6-Figure 9 As shown, the structure of the airflow guide mechanism 300 is further disclosed, the air entrainment ring 301 is installed around the inner wall of the lower surface of the top plate 203, the upper surface of the air entrainment ring 301 and the lower surface of the ring gas cylinder 208 are correspondingly connected, and a groove 302 is opened at the center of the surface of the air entrainment ring 301;

[0047] Furthermore, the slag in the furnace 202 is heated at high temperature to generate valuable metal gas, which rises directly from the top of the inner side of the furnace 202 and circulates in the groove 302 and the gas entrainment ring 301 through the gas entrainment pipe 303. Since the groove 302 is connected to the inside of the annular gas cylinder 208, and under the action of the airflow of the air, humidified pulverized coal and the valuable metal gas flowing in the annular gas cylinder 208 in an annular manner, the valuable metal gas in the groove 302 and the gas entrainment ring 301 and the gas circulating in the annular gas cylinder 208 move synchronously, and in the process of gas rising, the air and pulverized coal in the annular gas cylinder 208 are effectively mixed with the valuable metal gas in the groove 302 and the gas entrainment ring 301, thereby reducing the valuable metal gas.

[0048] The improvement lies in that the annular air cylinder 208 is used to drive the circulation of air and pulverized coal, and under the action of the air flow, the gas of valuable metals inside the groove 302 and the air entraining ring 301 is driven to move synchronously, so that the valuable metal gas, air and pulverized coal can maintain the consistency of gas flow during the mixed reduction process, which can effectively improve the work efficiency of gas reduction of valuable metals.

[0049] In summary, the working principle of this scheme is as follows: the slag in the furnace 202 is heated at high temperature, and the valuable metals in the slag are volatilized in the form of metals, oxides or sulfides, and rise to the top plate 203. Since the length and width of the top plate 203 are larger than the length and width of the furnace 202, the gas of the valuable metals can be introduced into the top plate 203, and the gas of the valuable metals is reduced inside the air entrainment ring 301 and the ring gas cylinder 208 arranged around the inner wall of the upper surface of the top plate 203, thereby effectively improving the working efficiency of the gas reduction treatment of the valuable metals;

[0050] After the valuable metal gas rises to the top plate 203, the heat conducting pipe 207 can introduce part of the valuable metal gas into the connecting pipe 205, and the connecting pipe 205 transmits air and pulverized coal to the annular gas cylinder 208 through the blower 204. Since the pulverized coal circulates in the connecting pipe 205 in a granular form, the pulverized coal may cause wear to the inner wall of the connecting pipe 205 after a long period of transmission. The contact of part of the valuable metal gas with the pulverized coal in the connecting pipe 205 can humidify the pulverized coal, thereby reducing the wear effect of the pulverized coal on the inner wall of the connecting pipe 205, and the humidified pulverized coal and air are transmitted to the inside of the annular gas cylinder 208 through the through ring 206 and the air nozzle 209, and circulate in the annular gas cylinder 208.

[0051] The humidified pulverized coal and air circulate inside the annular gas cylinder 208. At the same time, the air duct 303 can absorb the valuable metal gas rising from the lower surface of the top plate 203 and introduce it into the groove 302. As the humidified pulverized coal and air circulate inside the annular gas cylinder 208, airflow will be generated, and the valuable metal gas in the groove 302 can circulate synchronously with the airflow. The groove 302 and the annular gas cylinder 208 are correspondingly connected, so that the humidified pulverized coal, air and valuable metal gas can be circulated and reduced inside the annular gas cylinder 208, and finally discharged from the opened air duct groove 211, and the reduced valuable metal gas is introduced into the collection chamber 102, so as to facilitate the subsequent processing and purification of the reduced valuable metal gas through the air duct 103.

[0052] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A fuming furnace body, characterized in that: It comprises a furnace body (100), a humidifying mechanism (200) and an airflow guiding mechanism (300); The furnace body (100) comprises a heating chamber (101) and a combustion chamber (104); an airflow guide mechanism (300) is installed on the top of the inner side of the heating chamber (101); and a humidifying mechanism (200) is installed on the upper surface of the airflow guide mechanism (300); The humidifying mechanism (200) comprises a furnace (202) and a top plate (203), wherein the top plate (203) is installed around the upper surface of the furnace (202), and the inner wall of the upper surface of the top plate (203) is connected with an annular gas cylinder (208) around the inner wall, and the outer surface of the annular gas cylinder (208) is connected with a through ring (206) on both sides, and the surface of the through ring (206) is connected with a connecting pipe (205) on one side. The furnace (202) is used to place slag. When the combustion chamber (104) generates high-temperature heat, the slag is humidified. The slag placed in the furnace (202) is heated to generate valuable metal gas, which rises to the top plate (203). Heat pipes (207) are connected to both sides of the upper surface of the top plate (203). The heat pipes (207) introduce part of the valuable metal gas into the connecting pipe (205). Since the connecting pipe (205) transmits air and pulverized coal, the pulverized coal particles can be humidified during the transmission process in the connecting pipe (205) and finally introduced into the annular gas cylinder (208); The air flow guiding mechanism (300) comprises an air entrainment ring (301), and the lower surface of the air entrainment ring (301) is connected with air entrainment pipes (303) around the four sides. The air entrainment pipes (303) introduce the gas of valuable metals into the interior of the air entrainment ring (301). Since the air and the pulverized coal circulate inside the annular gas cylinder (208) through the connecting pipe (205), the valuable metal gas, the air and the pulverized coal are circulated and reduced inside the annular gas cylinder (208) and the air entrainment ring (301) through the movement trajectory of the air flow, and finally discharged from the ventilation groove (210).

2. The fuming furnace body according to claim 1, characterized in that: The inner upper surface of the heating chamber (101) is connected to a collecting chamber (102), and the center position of the upper surface of the collecting chamber (102) is connected to an air guide pipe (103). A bracket (105) is installed at the center position of the top of the inner side of the combustion chamber (104), and the upper surface of the bracket (105) corresponds vertically to the lower surface of the furnace (202).

3. The fuming furnace body according to claim 1, characterized in that: An air induction groove (211) is provided on the inner wall surface of the top plate (203), a blower (204) is installed on both sides of the upper end of the outer surface of the combustion chamber (104), the connecting pipe (205) is connected to one side of the surface of the blower (204), and air nozzles (209) are installed on both sides of the inner wall of the annular cylinder (208).

4. The fuming furnace body according to claim 3, characterized in that: The air entraining ring (301) is installed around the inner wall of the lower surface of the top plate (203), the upper surface of the air entraining ring (301) and the lower surface of the annular air cylinder (208) are correspondingly connected, and a groove (302) is opened at the center of the surface of the air entraining ring (301).

5. The fuming furnace body according to claim 3, characterized in that: There are four top plates (203) in total. The four top plates (203) are symmetrically distributed around the upper surface of the furnace (202). The top plates (203) are installed on the upper surface of the furnace (202) via heat conduction pipes (207).

6. The fuming furnace body according to claim 5, characterized in that: The heat conducting pipes (207) are symmetrically staggered and distributed on both sides of the upper surface of the top plate (203); one side of the surface of the heat conducting pipe (207) is correspondingly connected to the inside of the connecting pipe (205); the blower (204) transmits air and pulverized coal; the heat conducting pipes (207) heat the inside of the furnace (202) to generate valuable metal gas and transmit it to the inside of the connecting pipe (205), where the gas is mixed with the air and pulverized coal and finally transmitted to the inside of the ring gas cylinder (208) by using the through ring (206) and the air nozzle (209).

7. The fuming furnace body according to claim 6, characterized in that: The through ring (206) is symmetrically staggered and penetrates and is clamped on both sides of the outer surface of the annular gas cylinder (208), and is correspondingly connected to the air nozzle (209). The opening direction of the air nozzle (209) is parallel to the annular gas cylinder (208), so that air and pulverized coal can circulate around the inner wall of the annular gas cylinder (208).

8. The fuming furnace body according to claim 3, characterized in that: The air entrainment pipe (303) penetrates the interior of the air entrainment ring (301) and is correspondingly connected to the groove (302); the air entrainment ring (301) is correspondingly connected to the interior of the air ring cylinder (208) through the groove (302); and the air entrainment pipe (303) introduces the gas of valuable metals into the interior of the air entrainment ring (301), and flows synchronously with the flow direction of air and pulverized coal in the air ring cylinder (208).

Images