A water-cooled secondary lead smelting system

Abstract

A water-cooled secondary lead smelting system belongs to the technical field of secondary lead smelting. The smelting system includes: a smelting furnace, a flue outlet, a settling chamber, a waste heat boiler, a desulfurization and dust removal, a chimney and an electrical control cabinet; there is a flue outlet on the smelting furnace, and the flue outlet is sequentially connected with the settling chamber, the waste heat boiler, the desulfurization and dust removal and the chimney; the electrical control cabinet controls the normal operation of the secondary lead smelting system; the smelting furnace includes: a furnace top, a furnace wall, a charging port, a combustion-supporting hole, a slag discharge port, a lead discharge port, an observation door, a furnace bottom, a burner and a spray gun; the furnace top is a dome structure water-cooled furnace top, the inner end of the middle circle furnace top of the water-cooled furnace top is connected to the center circle furnace top, and the outer end of the middle circle furnace top is connected to the outer circle furnace top; the charging port is located on the middle circle furnace top; a water-cooled furnace wall is installed at the upper end of the furnace wall; and there is refractory mud at the junction of the water-cooled furnace wall and the water-cooled furnace top. Advantages: long service life, high lead recovery rate, easy operation, economical and applicable, less unorganized emissions, comprehensive utilization of resources, energy saving and consumption reduction.

Description

Technical Field

[0001] The utility model relates to the technical field of secondary lead smelting, in particular to a water-cooled secondary lead smelting system. Background Art

[0002] The main smelting methods of primary lead at home and abroad include sintering-blast furnace smelting, submerged top-blown Ausmelt smelting-blast furnace reduction, oxygen top-blown Kaldo converter, and Kivcet; the smelting methods of secondary lead mainly include reverberatory furnace smelting, short kiln smelting, and blast furnace smelting. All of the above methods can meet the current environmental protection requirements, but they all have their own shortcomings. The kivecet process has cumbersome material preparation in the early stage and high production costs; the oxygen-enriched top-blown Ausmelt process has a large investment, single furnace segmented operation, and high labor intensity; the sintering machine-blast furnace process has a low concentration of SO2 produced by the sintering machine, which is difficult to recover and has a bad on-site environment; the reverberatory furnace smelting process is a process that the country has clearly eliminated; the fuel used in the blast furnace smelting method is expensive metallurgical coke; the short kiln smelting method has a high content of valuable metals in the smelting waste.

[0003] With the development of the national economy, the use of lead is increasing, and the consumption and scrapping of lead-acid batteries are increasing. How to efficiently and environmentally recycle waste lead-acid batteries, especially the treatment of lead mud and lead paste in waste batteries, has attracted widespread attention. Most of the existing smelting process methods have poor production process continuity, low thermal efficiency, small single furnace scale, high cost, low lead direct recovery rate, high content of valuable metals in slag, etc., which will not only cause waste of resources, but also cause serious pollution to the ecological environment.

[0004] The secondary lead smelting system comprises: a smelting furnace 1, a flue outlet 10, a settling chamber 16, a waste heat boiler 17, a desulfurization and dust removal 18, a chimney 19, a furnace shell and an electrical control cabinet; the smelting furnace 1 is provided with a flue outlet 10, and the flue outlet 10 is sequentially connected with the settling chamber 16, the waste heat boiler 17, the desulfurization and dust removal 18 and the chimney 19; the smelting furnace 1 is wrapped with a furnace shell of steel plates, and the electrical control cabinet controls the normal operation of the electrical equipment in the smelting system of the secondary lead.

[0005] The smelting furnace 1 comprises: a furnace top, a furnace wall 2, a charging port 4, a combustion-supporting hole, a slag discharge port 7, a lead discharge port 8, an observation door 9, a furnace bottom 13, a burner 14 and a spray gun 15; the furnace wall 2 is built with refractory bricks, the furnace top is connected to the upper end of the furnace wall 2, and the furnace bottom 13 is connected to the lower end of the furnace wall 2; there is a charging port 4 on the furnace top; there is a slag discharge port 7 on the furnace wall 2 at the intersection of the slag line and the lead liquid line, there is a lead discharge port 8 at the intersection of the furnace wall 2 and the furnace bottom 13, and there is a combustion-supporting hole and an observation door 9 on the furnace wall 2 at the upper end of the slag line; there are multiple combustion-supporting holes, which are spray gun holes 5 and burner holes 6; the spray gun 15 and the burner 14 are respectively installed on the spray gun hole 5 and the burner hole 6.

[0006] The molten pool, furnace wall, furnace roof and other parts of the smelting furnace are the areas where the high-temperature redox reaction of the smelting furnace is most intense. In particular, the furnace wall near the liquid slag line must withstand the high temperature and high pressure environment, as well as the erosion of liquid slag and corrosive gases. The harsh working conditions put forward higher requirements on the smelting furnace. Generally, the secondary lead smelting furnace is built with refractory bricks. Refractory bricks are easy to burn during the production process and have a short service life, which increases the frequency of furnace repairs and affects normal production. Utility Model Content

[0007] The utility model aims to provide a water-cooled secondary lead smelting system to solve the problem that the existing secondary lead smelting furnace built with refractory bricks is easy to burn during the production process and has a short service life.

[0008] The smelting system includes: a smelting furnace, a flue outlet, a settling chamber, a waste heat boiler, a desulfurization and dust removal, a chimney, a furnace shell and an electrical control cabinet; there is a flue outlet on the smelting furnace, and the flue outlet is sequentially connected with the settling chamber, the waste heat boiler, the desulfurization and dust removal and the chimney; the furnace shell is wrapped with a steel plate outside the smelting furnace, and the electrical control cabinet controls the normal operation of the electrical equipment in the smelting system of the secondary lead;

[0009] The smelting furnace comprises: a furnace top, a furnace wall, a slag discharge port, a lead discharge port, and a furnace bottom;

[0010] The furnace wall is built with refractory bricks, the furnace bottom is connected to the lower end of the furnace wall, and the furnace top is located at the top; there is a slag discharge port on the furnace wall at the intersection of the slag line and the lead liquid line, and there is a lead discharge port at the intersection of the furnace wall and the furnace bottom;

[0011] The furnace top is a water-cooled furnace top, which is a dome structure and has a charging port.

[0012] The furnace wall also includes a water-cooled furnace wall, which is installed at the upper end of the furnace wall and located in the slag area above the lead liquid line; there are furnace wall combustion-supporting holes and an observation door on the water-cooled furnace wall at the upper end of the slag line, and there are multiple furnace wall combustion-supporting holes, which are respectively a spray gun hole and a burner hole; a spray gun and a burner are respectively installed on the spray gun hole and the burner hole;

[0013] There is refractory sealing mud at the junction of the water-cooled furnace wall and the water-cooled furnace top.

[0014] The water-cooled furnace wall comprises: a furnace wall cooling wall, a furnace wall combustion-supporting hole, a furnace wall fixing bolt, a furnace wall brick dovetail groove, a furnace wall cooling wall serpentine pipe, a furnace wall water outlet, a furnace wall water inlet and a furnace wall refractory brick; the furnace wall cooling wall is an arc-shaped rectangular block, and there are furnace wall combustion-supporting holes and fixing holes on the furnace wall cooling wall. The furnace wall fixing bolts fix the furnace wall cooling wall on the furnace shell through the fixing holes. Multiple furnace wall cooling walls are spliced ​​into a circular tubular water-cooled furnace wall. The gaps between adjacent furnace wall cooling walls and between the furnace wall cooling walls and the furnace wall are filled with refractory clinker of the same material as the masonry furnace wall refractory bricks, and the gap between the furnace wall cooling wall and the furnace shell is pressed into refractory mud;

[0015] There are two furnace wall cooling stave serpentine tubes, which are embedded in the furnace wall cooling stave side by side. A furnace wall water outlet and a furnace wall water inlet are respectively provided at both ends of the two furnace wall cooling stave serpentine tubes, which are led out of the furnace wall cooling stave. A furnace wall brick dovetail groove is provided on the back of the furnace wall cooling stave, and furnace wall refractory bricks are inlaid on the furnace wall brick dovetail groove. A dovetail tenon is provided at one end of the furnace wall refractory brick, and the dovetail tenon matches the furnace wall brick dovetail groove.

[0016] The two furnace wall cooling wall serpentine tubes are arranged one vertically and the other horizontally; when the furnace wall cooling wall serpentine tubes pass through the furnace wall combustion-supporting holes, they are arranged around the furnace wall combustion-supporting holes; the fixing holes are located on the furnace wall cooling wall in the gap between the furnace wall cooling wall serpentine tubes.

[0017] The water-cooled furnace top is composed of a center circle furnace top, a middle circle furnace top and an outer circle furnace top; the inner end of the middle circle furnace top is connected to the center circle furnace top, and the outer end of the middle circle furnace top is connected to the outer circle furnace top to form a dome structure; the feeding port is located on the middle circle furnace top, and there are 1-6 feeding ports.

[0018] The shape of the center furnace roof is different from that of the middle furnace roof and the outer furnace roof;

[0019] The shape of the center circle furnace top is circular and in one piece;

[0020] The middle furnace roof and the outer furnace roof are both fan-shaped, with multiple pieces spliced ​​into a ring;

[0021] The circular ring formed by splicing the middle circle furnace top surrounds the circular circumference of the center circle furnace top;

[0022] The outer furnace top is spliced ​​into a circular ring that surrounds the circumference of the middle furnace top circular ring.

[0023] The central ring furnace roof, the middle ring furnace roof and the outer ring furnace roof have the same structure, and all include: furnace roof cooling staves, furnace roof fixing bolts, furnace roof brick dovetail grooves, furnace roof cooling stave serpentine pipes, furnace roof water inlet, furnace roof water outlet and furnace roof refractory bricks;

[0024] The furnace roof cooling staves are circular or fan-shaped. The fan-shaped ones are made of multiple pieces spliced ​​into a ring. There are fixing holes on the furnace roof cooling staves. The furnace roof fixing bolts are fixed to the furnace shell through the fixing holes. Refractory mud is pressed into the gaps between adjacent furnace roof cooling staves and between the middle circle furnace roof and the outer circle furnace roof formed by the furnace roof cooling staves to form a complete dome furnace roof.

[0025] Two furnace top cooling stave serpentine pipes are embedded in the furnace top cooling stave side by side, and a furnace wall water inlet and a furnace wall water outlet are respectively provided at both ends of the two furnace top cooling stave serpentine pipes, which are led out of the furnace top cooling stave; a furnace top brick dovetail groove is provided on the back of the furnace top cooling stave, and a furnace top refractory brick is inlaid on the furnace top brick dovetail groove; a dovetail tenon is provided at one end of the furnace top refractory brick, and the dovetail tenon matches the furnace top brick dovetail groove;

[0026] A circular ring formed by splicing a plurality of fan-shaped middle ring furnace roofs includes a middle ring furnace roof with a furnace top charging port; in the middle ring furnace roofs spliced ​​into a circular ring, there are 1 to 6 fan-shaped middle ring furnace roofs with a furnace top charging port; and furnace top charging port refractory bricks are installed in the furnace top charging port.

[0027] In the circular furnace top cooling wall, the two furnace top cooling wall serpentine tubes both start from a point on the edge of the center circle furnace top, and are repeatedly bent horizontally to another point on the edge and terminate. The two furnace top cooling wall serpentine tubes are arranged in a staggered manner vertically and horizontally.

[0028] In the fan-shaped furnace roof cooling stave, two furnace roof cooling stave serpentine pipes are arranged in the same manner on the middle ring furnace roof and the outer ring furnace roof, one of which starts from one end of the fan-shaped surface and is repeatedly bent horizontally to another point of the fan-shaped surface, and the other starts from one end of the fan-shaped surface and is repeatedly bent longitudinally to another point of the fan-shaped surface;

[0029] When the furnace top cooling wall serpentine pipe arranged on the middle ring furnace top encounters the furnace top charging port, it is arranged around the furnace top charging port.

[0030] Beneficial effect: due to the adoption of the above scheme, the prepared charge (lead-containing materials such as lead mud, reducing coal, iron oxide or iron filings mixed in a certain proportion) is added from the charging port on the top of the smelting furnace through a belt conveyor, and pure oxygen or oxygen-enriched air, natural gas, and pulverized coal are blown into the furnace from the combustion-supporting holes on the furnace wall through a spray gun and a burner. The charge is heated and melted in the furnace body, and a strong chemical reaction occurs. The lead compounds in the lead mud are reduced to metallic lead and sink to the bottom of the furnace and are discharged through the lead discharge port. The generated slag is discharged through the slag discharge port, and the generated flue gas enters the settling chamber through the flue outlet to settle large particles of smoke and dust, recovers waste heat through a waste heat boiler for reuse, and finally passes through a desulfurization and dust removal device to remove sulfur dioxide and dust to meet emission standards.

[0031] Water-cooled cooling staves are installed in the furnace wall and furnace roof of the smelting furnace. During production, the water inlet pipe of the water-cooled cooling stave system continuously adds cooling water to the cooling stave through the cooling stave water inlet. The cooling water is forced to cool the furnace wall and furnace roof through the cooling stave and then discharged from the water outlet. Due to the effect of cooling water in the cooling stave, the temperature gradient of the furnace body is changed, the heat dissipation of the furnace body is increased, which is beneficial to the slag protection of the refractory bricks of the furnace lining, so that a slag layer is formed on the surface of the refractory bricks, thereby greatly delaying the erosion of the furnace lining and significantly extending the life of the furnace lining. The service life of the smelting furnace has been extended from about one year before to two years or even longer now.

[0032] The utility model solves the problem that the existing secondary lead smelting furnace built with refractory bricks is easy to burn out and has a short service life during the production process, thereby achieving the purpose of the utility model.

[0033] Advantages: The utility model has the advantages of long service life of the smelting furnace, high lead recovery rate, easy operation, economic applicability, less unorganized emissions, comprehensive utilization of resources, energy saving and consumption reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural diagram of the utility model.

[0035] Figure 2 It is a schematic diagram of the cross-sectional structure of the smelting furnace of the utility model.

[0036] Figure 3 The utility model is a schematic diagram of the cross-sectional structure of the water-cooled furnace top.

[0037] Figure 4 yes Figure 3 Schematic diagram of the top view structure.

[0038] Figure 5 The utility model is a schematic diagram of the cross-sectional structure of the middle circle furnace roof of the water-cooled furnace roof.

[0039] Figure 6 The utility model is a schematic diagram of the cross-sectional structure of the furnace top cooling wall of the middle ring furnace top.

[0040] Figure 7 The utility model is a schematic diagram of the horizontal arrangement structure of the serpentine pipes in the furnace top cooling fireplace top of the middle circle furnace top.

[0041] Figure 8 The utility model is a schematic diagram of the vertical arrangement structure of the serpentine pipes in the furnace top cooling fireplace top of the middle circle furnace top.

[0042] Fig. 9 It is a schematic diagram of the furnace wall cooling stave structure of the utility model.

[0043] Fig.10 yes Fig.12 Schematic diagram of the top view structure.

[0044] Fig.11 The utility model is a schematic diagram of the vertical arrangement structure of the furnace wall cooling wall serpentine pipes in the furnace wall cooling wall.

[0045] Fig.12 The utility model is a schematic diagram of the transverse arrangement structure of the furnace wall cooling wall serpentine tubes in the furnace wall cooling wall.

[0046] In the figure, 1. smelting furnace; 2. furnace wall; 3. water-cooled furnace top; 4. charging port; 5. spray gun hole; 6. burner hole; 7. slag discharge port; 8. lead discharge port; 9. observation door; 10. flue outlet; 11. refractory sealing mud; 12. water-cooled furnace wall; 13. furnace bottom; 14. burner; 15. spray gun; 16. settling chamber; 17. waste heat boiler; 18. desulfurization and dust removal; 19. chimney.

[0047] 3-1, furnace top cooling wall; 3-2, furnace top charging port; 3-3, furnace top fixing bolts; 3-4, furnace top brick dovetail groove; 3-5, furnace top cooling wall serpentine pipe; 3-6, furnace top water inlet; 3-7, furnace top water outlet; 3-8, furnace top refractory bricks; 3-9, furnace top charging port refractory bricks; 3-1-1, center ring furnace top; 3-1-2, middle ring furnace top; 3-1-3, outer ring furnace top.

[0048] 12-1. Furnace wall cooling stave; 12-2. Furnace wall combustion-supporting holes; 12-3. Furnace wall fixing bolts; 12-4. Furnace wall brick dovetail groove; 12-5. Furnace wall cooling stave serpentine pipe; 12-6. Furnace wall water outlet; 12-7. Furnace wall water inlet; 12-8. Furnace wall refractory bricks. DETAILED DESCRIPTION

[0049] Embodiment 1: Figure 1 The smelting system of the secondary lead comprises: a smelting furnace 1, a flue outlet 10, a settling chamber 16, a waste heat boiler 17, a desulfurization and dust removal 18, a chimney 19, a furnace shell and an electrical control cabinet; the smelting furnace 1 is provided with a flue outlet 10, and the flue outlet 10 is sequentially connected with the settling chamber 16, the waste heat boiler 17, the desulfurization and dust removal 18 and the chimney 19; the smelting furnace 1 is wrapped with a furnace shell of steel plates, and the electrical control cabinet controls the normal operation of the electrical equipment in the smelting system of the secondary lead.

[0050] Figure 2 In the embodiment, the smelting furnace 1 comprises: a furnace top, a furnace wall 2, a slag discharge port 7, a lead discharge port 8, and a furnace bottom 13;

[0051] The furnace wall 2 is built with refractory bricks, a furnace bottom 13 is connected to the lower end of the furnace wall 2, and the furnace top is located at the top; there is a slag discharge port 7 on the furnace wall at the intersection of the slag line and the lead liquid line, and there is a lead discharge port 8 at the intersection of the furnace wall 2 and the furnace bottom 13.

[0052] The furnace top is a water-cooled furnace top 3, which is a dome structure, and a feed port 4 is provided on the water-cooled furnace top 3;

[0053] The furnace wall 2 further comprises a water-cooled furnace wall 12, which is installed at the upper end of the furnace wall 2 and is located in the slag area above the lead liquid line; the water-cooled furnace wall 12 at the upper end of the slag line is provided with a furnace wall combustion-supporting hole 12-2 and an observation door 9, and the furnace wall combustion-supporting hole 12-2 has a plurality of holes, namely, a spray gun hole 5 and a burner hole 6; a spray gun 15 and a burner 14 are installed on the spray gun hole 5 and the burner hole 6 respectively;

[0054] There is a refractory seal 11 at the junction of the water-cooled furnace wall 12 and the water-cooled furnace top 3.

[0055] The water-cooled furnace wall 12 comprises: a furnace wall cooling stave 12-1, a furnace wall combustion-supporting hole 12-2, a furnace wall fixing bolt 12-3, a furnace wall brick dovetail groove 12-4, a furnace wall cooling stave serpentine pipe 12-5, a furnace wall water outlet 12-6, a furnace wall water inlet 12-7 and a furnace wall refractory brick 12-8; the furnace wall cooling stave 12-1 is an arc-shaped rectangular block, and there are furnace wall combustion-supporting holes 12-2 and fixing holes on the furnace wall cooling stave 12-1. The furnace wall fixing bolts 12-3 fix the furnace wall cooling stave 12-1 on the furnace shell through the fixing holes. Multiple furnace wall cooling staves 12-1 are spliced ​​into a tubular water-cooled furnace wall 12. The gaps between adjacent furnace wall cooling staves 12-1 and between the furnace wall cooling staves 12-1 and the furnace wall 2 are filled with refractory clinker of the same material as the refractory bricks of the masonry furnace wall. The gap between the furnace wall cooling stave 12-1 and the furnace shell is pressed into refractory mud.

[0056] Fig. 9 , Fig.10 There are two furnace wall cooling stave serpentine pipes 12-5, which are embedded in the furnace wall cooling stave 12-1 side by side, and furnace wall water outlets 12-6 and furnace wall water inlets 12-7 are respectively provided at both ends of the two furnace wall cooling stave serpentine pipes 12-5, which are led out of the furnace wall cooling stave 12-1; there is a furnace wall brick dovetail groove 12-4 on the back of the furnace wall cooling stave 12-1, and furnace wall refractory bricks 12-8 are inlaid on the furnace wall brick dovetail groove 12-4; one end of the furnace wall refractory brick 12-8 has a dovetail tenon, and the dovetail tenon matches the furnace wall brick dovetail groove 12-4.

[0057] Fig.11 Among the two furnace wall cooling wall serpentine tubes 12-5, one is arranged vertically; Fig.12 In the figure, another furnace wall cooling wall serpentine tube 12-5 is arranged horizontally; when the furnace wall cooling wall serpentine tube 12-5 passes through the furnace wall combustion-supporting hole 12-2, it is arranged around the furnace wall combustion-supporting hole 12-2; the fixing hole is located on the furnace wall cooling wall 12-1 in the gap where the furnace wall cooling wall serpentine tube 12-5 is arranged.

[0058] Figure 3 , Figure 4 In the embodiment, the furnace roof is a dome structure, which is a water-cooled furnace roof 3, and the water-cooled furnace roof 3 is composed of a center circle furnace roof 3-1-1, a middle circle furnace roof 3-1-2 and an outer circle furnace roof 3-1-3; the inner end of the middle circle furnace roof 3-1-2 is connected to the center circle furnace roof 3-1-1, and the outer end of the middle circle furnace roof 3-1-2 is connected to the outer circle furnace roof 3-1-3 to form a dome structure; a charging port 4 is located on the middle circle furnace roof 3-1-2; and there are 1 to 6 charging ports 4.

[0059] The shape of the center ring furnace top 3-1-1 is different from that of the middle ring furnace top 3-1-2 and the outer ring furnace top 3-1-3;

[0060] The center ring furnace top 3-1-1 is circular in shape and is one piece;

[0061] The middle furnace roof 3-1-2 and the outer furnace roof 3-1-3 are both fan-shaped, and are formed by multiple pieces being spliced ​​into a ring;

[0062] The circular ring formed by the middle furnace top 3-1-2 surrounds the circular circumference of the center furnace top 3-1-1;

[0063] The outer furnace roof 3-1-3 is spliced ​​into a circular ring which surrounds the circumference of the middle furnace roof 3-1-2 circular ring.

[0064] Figure 5 , Figure 6 The center circle furnace top 3-1-1, the middle circle furnace top 3-1-2 and the outer circle furnace top 3-1-3 have the same structure, and all include: a furnace top cooling stave 3-1, a furnace top fixing bolt 3-3, a furnace top brick dovetail groove 3-4, a furnace top cooling stave serpentine pipe 3-5, a furnace top water inlet 3-6, a furnace top water outlet 3-7 and a furnace top refractory brick 3-8;

[0065] The furnace top cooling stave 3-1 has a circular shape or a fan shape, and the fan shape is a plurality of pieces spliced ​​into a circular ring; a fixing hole is provided on the furnace top cooling stave 3-1, and the furnace top fixing bolts 3-3 fix the furnace top cooling stave 3-1 to the furnace shell through the fixing hole, and refractory mud is pressed into the gap between adjacent furnace top cooling staves 3-1 and between the middle circle furnace top 3-1-2 and the outer circle furnace top 3-1-3 formed by the furnace top cooling staves 3-1 to form a complete dome furnace top.

[0066] Two furnace top cooling stave serpentine pipes 3-5 are embedded in the furnace top cooling stave 3-1 side by side, and furnace wall water inlet 3-6 and furnace wall water outlet 3-7 are respectively provided at both ends of the two furnace top cooling stave serpentine pipes 3-5, which are led out of the furnace top cooling stave 3-1; a furnace top brick dovetail groove 3-4 is provided on the back of the furnace top cooling stave 3-1, and a furnace top refractory brick 3-8 is inlaid on the furnace top brick dovetail groove 3-4; one end of the furnace top refractory brick 3-8 has a dovetail tenon, and the dovetail tenon matches the furnace top brick dovetail groove 3-4;

[0067] The circular ring formed by multiple fan-shaped middle circle furnace roofs 3-1-2 includes a middle circle furnace roof 3-1-2 with a furnace top charging port 3-2; among the middle circle furnace roofs 3-1-2 spliced ​​into a circular ring, there are 1-6 fan-shaped middle circle furnace roofs 3-1-2 with a furnace top charging port 3-2; and a furnace top charging port refractory brick 3-9 is installed in the furnace top charging port 3-2.

[0068] In the circular furnace roof cooling stave 3-1, the two furnace roof cooling stave serpentine pipes 3-5 are arranged to start from a point on the edge of the center circle furnace roof 3-1-1 and to bend horizontally continuously and repeatedly to terminate at another point on the edge.

[0069] The furnace top cooling wall serpentine pipe 3-5 is arranged in the same manner on the middle furnace top 3-1-2 and the outer furnace top 3-1-3. Figure 7 In the process, one end of the fan-shaped surface is taken as the starting point, and the horizontal bending is repeated continuously to terminate at another point of the fan-shaped surface. The two furnace top cooling wall serpentine tubes 3-5 are arranged vertically and horizontally.

[0070] Figure 8 In the fan-shaped furnace roof cooling wall 3-1, two furnace roof cooling wall serpentine pipes 3-5 are arranged the same on the middle circle furnace roof 3-1-2 and the outer circle furnace roof 3-1-3, one of which starts from one end of the fan-shaped surface and continuously repeats longitudinal and transverse bending to terminate at another point of the fan-shaped surface, and the other starts from one end of the fan-shaped surface and continuously repeats longitudinal bending to terminate at another point of the fan-shaped surface; when the furnace roof cooling wall serpentine pipes 3-5 arranged on the middle circle furnace roof 3-1-2 encounter the furnace roof charging port 3-2, they are arranged around the furnace roof charging port 3-2.

Claims

1. A water-cooled secondary lead smelting system, the smelting system comprising: Smelting furnace, flue outlet, settling chamber, waste heat boiler, desulfurization and dust removal, chimney, furnace shell and electrical control cabinet; there is a flue outlet on the smelting furnace, and the flue outlet is connected with the settling chamber, waste heat boiler, desulfurization and dust removal and chimney in sequence; the furnace shell is wrapped with steel plates outside the smelting furnace, and the electrical control cabinet controls the normal operation of electrical equipment in the smelting system of recycled lead; The smelting furnace comprises: a furnace top, a furnace wall, a slag discharge port, a lead discharge port, and a furnace bottom; The furnace wall is built with refractory bricks, the furnace bottom is connected to the lower end of the furnace wall, and the furnace top is located at the top; there is a slag discharge port on the furnace wall at the intersection of the slag line and the lead liquid line, and there is a lead discharge port at the intersection of the furnace wall and the furnace bottom; The feature of the furnace is that the furnace top is a water-cooled furnace top, the water-cooled furnace top is a dome structure, and there is a charging port on the water-cooled furnace top; The furnace wall also includes a water-cooled furnace wall, which is installed at the upper end of the furnace wall and located in the slag area above the lead liquid line; there are furnace wall combustion-supporting holes and an observation door on the water-cooled furnace wall at the upper end of the slag line, and there are multiple furnace wall combustion-supporting holes, which are respectively a spray gun hole and a burner hole; a spray gun and a burner are respectively installed on the spray gun hole and the burner hole; There is refractory sealing mud at the junction of the water-cooled furnace wall and the water-cooled furnace top.

2. A water-cooled secondary lead smelting system according to claim 1, characterized in that: The water-cooled furnace wall comprises: a furnace wall cooling wall, a furnace wall combustion-supporting hole, a furnace wall fixing bolt, a furnace wall brick dovetail groove, a furnace wall cooling wall serpentine pipe, a furnace wall water outlet, a furnace wall water inlet and a furnace wall refractory brick; the furnace wall cooling wall is an arc-shaped rectangular block, and there are furnace wall combustion-supporting holes and fixing holes on the furnace wall cooling wall. The furnace wall fixing bolts fix the furnace wall cooling wall on the furnace shell through the fixing holes. Multiple furnace wall cooling walls are spliced ​​into a circular tubular water-cooled furnace wall. The gaps between adjacent furnace wall cooling walls and between the furnace wall cooling walls and the furnace wall are filled with refractory clinker of the same material as the masonry furnace wall refractory bricks, and the gap between the furnace wall cooling wall and the furnace shell is pressed into refractory mud; There are two furnace wall cooling stave serpentine tubes, which are embedded in the furnace wall cooling stave side by side. A furnace wall water outlet and a furnace wall water inlet are respectively provided at both ends of the two furnace wall cooling stave serpentine tubes, which are led out of the furnace wall cooling stave. A furnace wall brick dovetail groove is provided on the back of the furnace wall cooling stave, and furnace wall refractory bricks are inlaid on the furnace wall brick dovetail groove. A dovetail tenon is provided at one end of the furnace wall refractory brick, and the dovetail tenon matches the furnace wall brick dovetail groove.

3. A water-cooled secondary lead smelting system according to claim 2, characterized in that: The two furnace wall cooling wall serpentine tubes are arranged one vertically and the other horizontally; when the furnace wall cooling wall serpentine tubes pass through the furnace wall combustion-supporting holes, they are arranged around the furnace wall combustion-supporting holes; the fixing holes are located on the furnace wall cooling wall in the gap between the furnace wall cooling wall serpentine tubes.

4. A water-cooled secondary lead smelting system according to claim 1, characterized in that: The water-cooled furnace top is composed of a center circle furnace top, a middle circle furnace top and an outer circle furnace top; the inner end of the middle circle furnace top is connected to the center circle furnace top, and the outer end of the middle circle furnace top is connected to the outer circle furnace top to form a dome structure; the feeding port is located on the middle circle furnace top, and there are 1-6 feeding ports.

5. A water-cooled secondary lead smelting system according to claim 4, characterized in that: The shape of the center furnace roof is different from that of the middle furnace roof and the outer furnace roof; The shape of the center circle furnace top is circular and in one piece; The middle furnace roof and the outer furnace roof are both fan-shaped, with multiple pieces spliced ​​into a ring; The circular ring formed by splicing the middle circle furnace top surrounds the circular circumference of the center circle furnace top; The outer furnace top is spliced ​​into a circular ring that surrounds the circumference of the middle furnace top circular ring.

6. A water-cooled secondary lead smelting system according to claim 4, characterized in that: The central ring furnace roof, the middle ring furnace roof and the outer ring furnace roof have the same structure, and all include: furnace roof cooling staves, furnace roof fixing bolts, furnace roof brick dovetail grooves, furnace roof cooling stave serpentine pipes, furnace roof water inlet, furnace roof water outlet and furnace roof refractory bricks; The furnace roof cooling staves are circular or fan-shaped. The fan-shaped ones are made of multiple pieces spliced ​​into a ring. There are fixing holes on the furnace roof cooling staves. The furnace roof fixing bolts are fixed to the furnace shell through the fixing holes. Refractory mud is pressed into the gaps between adjacent furnace roof cooling staves and between the middle circle furnace roof and the outer circle furnace roof formed by the furnace roof cooling staves to form a complete dome furnace roof. Two furnace top cooling stave serpentine pipes are embedded in the furnace top cooling stave side by side, and a furnace wall water inlet and a furnace wall water outlet are respectively provided at both ends of the two furnace top cooling stave serpentine pipes, which are led out of the furnace top cooling stave; a furnace top brick dovetail groove is provided on the back of the furnace top cooling stave, and a furnace top refractory brick is inlaid on the furnace top brick dovetail groove; a dovetail tenon is provided at one end of the furnace top refractory brick, and the dovetail tenon matches the furnace top brick dovetail groove; A circular ring formed by splicing a plurality of fan-shaped middle ring furnace roofs includes a middle ring furnace roof with a furnace top charging port; in the middle ring furnace roofs spliced ​​into a circular ring, there are 1 to 6 fan-shaped middle ring furnace roofs with a furnace top charging port; and furnace top charging port refractory bricks are installed in the furnace top charging port.

7. A water-cooled secondary lead smelting system according to claim 6, characterized in that: In the circular furnace top cooling wall, the two furnace top cooling wall serpentine tubes both start from a point on the edge of the center circle furnace top, and are repeatedly bent horizontally to another point on the edge and terminate. The two furnace top cooling wall serpentine tubes are arranged in a staggered manner vertically and horizontally.

8. A water-cooled secondary lead smelting system according to claim 6, characterized in that: In the fan-shaped furnace roof cooling stave, two furnace roof cooling stave serpentine pipes are arranged in the same manner on the middle ring furnace roof and the outer ring furnace roof, one of which starts from one end of the fan-shaped surface and is repeatedly bent horizontally to another point of the fan-shaped surface, and the other starts from one end of the fan-shaped surface and is repeatedly bent longitudinally to another point of the fan-shaped surface; When the furnace top cooling wall serpentine pipe arranged on the middle ring furnace top encounters the furnace top charging port, it is arranged around the furnace top charging port.

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