A water-cooled furnace top of a secondary lead smelting furnace

Abstract

A water-cooled furnace roof of a secondary lead smelting furnace belongs to the technical field of secondary lead smelting. The water-cooled furnace roof is composed of a center circle furnace roof, a middle circle furnace roof and an outer circle furnace roof; the inner end of the middle circle furnace roof is connected to the center circle furnace roof, and the outer end of the middle circle furnace roof is connected to the outer circle furnace roof to form a dome structure; the shape of the center circle furnace roof is different from that of the middle circle furnace roof and the outer circle furnace roof; the shape of the center circle furnace roof is circular and is one piece; the shape of the middle circle furnace roof and the outer circle furnace roof are both fan-shaped, and both are spliced ​​into a circular ring with multiple pieces; the circular ring spliced ​​by the middle circle furnace roof surrounds the circular circumference of the center circle furnace roof; the circular ring spliced ​​by the outer circle furnace roof surrounds the circumference of the circular ring of the middle circle furnace roof. Advantages: simple structure, low cost, high strength, long service life, and greatly shortened maintenance time.

Description

Technical Field

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

[0002] The roof of the secondary lead smelting furnace generally adopts an arched roof, which is often built with wedge-shaped bricks. The material of the wedge-shaped bricks is generally selected from refractory materials such as magnesium chromium, magnesium aluminum chromium, etc. In a high-temperature environment, the roof structure and materials are required to have good thermal stability, thermal shock resistance and corrosion resistance. During the smelting process, due to the different heating methods and heating points in the furnace, it needs to withstand a high temperature and high pressure environment. Under such harsh working conditions, the furnace roof is eroded and corroded by high-temperature airflow, causing the arched furnace roof to deform locally due to the difference in thermal expansion, uneven force, and collapse of the furnace roof. The refractory bricks are easily burned, shortening the service life of the refractory materials on the furnace roof, increasing the frequency of furnace repairs, and long maintenance and replacement time, affecting normal production. Utility Model Content

[0003] The utility model aims to provide a water-cooled furnace roof of a secondary lead smelting furnace, so as to solve the problem that the furnace roof of the existing secondary lead smelting furnace is washed and eroded by liquid slag and corrosive gas during the production process, and the refractory bricks are easily burned.

[0004] The purpose of the utility model is achieved in this way: the water-cooled furnace roof is composed of a center ring furnace roof, a middle ring furnace roof and an outer ring furnace roof; the inner end of the middle ring furnace roof is connected to the center ring furnace roof, and the outer end of the middle ring furnace roof is connected to the outer ring furnace roof to form a dome structure.

[0005] The shape of the center furnace roof is different from that of the middle furnace roof and the outer furnace roof;

[0006] The shape of the center circle furnace top is circular and in one piece;

[0007] The middle furnace roof and the outer furnace roof are both fan-shaped, with multiple pieces spliced ​​into a ring;

[0008] The circular ring formed by splicing the middle circle furnace top surrounds the circular circumference of the center circle furnace top;

[0009] The outer furnace top is spliced ​​into a circular ring that surrounds the circumference of the middle furnace top circular ring.

[0010] 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;

[0011] 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.

[0012] There are two furnace roof cooling wall serpentine tubes, which are embedded in the furnace roof cooling wall side by side. The two ends of the two furnace roof cooling wall serpentine tubes are respectively provided with a furnace wall water inlet and a furnace wall water outlet, which are led out of the furnace roof cooling wall; there is a furnace roof brick dovetail groove on the back of the furnace roof cooling wall, and furnace roof refractory bricks are inlaid on the furnace roof brick dovetail groove; one end of the furnace roof refractory brick is provided with a dovetail tenon, and the dovetail tenon matches the furnace roof brick dovetail groove.

[0013] 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.

[0014] 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.

[0015] 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;

[0016] 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.

[0017] Beneficial effect: Due to the adoption of the above scheme, the furnace roof is a dome structure, which overcomes the defect of the furnace roof collapsing due to local deformation, and the furnace roof of the dome structure expands evenly, thereby extending the service life of the furnace roof. It can save a lot of repair time and greatly improve the productivity of the furnace.

[0018] The serpentine tube adopts a double-layer vertical and horizontal cross arrangement, with two inlets and two outlets, and has a large cooling capacity. The heat transferred from the furnace is smoothly discharged through the serpentine tube water cooling, and a slag skin protective layer is quickly formed on the cooling wall. The cooling wall has a strong slag hanging ability and good performance, which prevents high-temperature heat flow from directly reaching the furnace shell, prolonging the service life of the smelting furnace, thereby forming a stable and safe working state, which can adapt to the high-temperature environment of the smelting furnace and has a stable structure.

[0019] The utility model solves the problem that the furnace top of the existing secondary lead smelting furnace is washed and eroded by liquid slag and corrosive gas during the production process, and the refractory bricks are easily burned, thereby achieving the purpose of the utility model.

[0020] Advantages: Advantages: simple structure, low cost, high strength, long service life, and greatly shortened maintenance time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The utility model is a schematic diagram of the cross-sectional structure of the water-cooled furnace top.

[0022] Figure 2 yes Figure 1 Schematic diagram of the top view structure.

[0023] Figure 3 The utility model is a schematic diagram of the cross-sectional structure of the middle circle furnace roof of the water-cooled furnace roof.

[0024] Figure 4 The utility model is a schematic diagram of the cross-sectional structure of the furnace top cooling wall of the middle ring furnace top.

[0025] Figure 5 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.

[0026] Figure 6 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.

[0027] 1. Core furnace top; 2. Middle furnace top; 3. Outer furnace top.

[0028] 2-1. Furnace top cooling wall; 2-2. Furnace top charging port; 2-3. Furnace top fixing bolts; 2-4. Furnace top brick dovetail groove; 2-5. Furnace top cooling wall serpentine pipe; 2-6. Furnace top water inlet; 2-7. Furnace top water outlet; 2-8. Furnace top refractory bricks; 2-9. Furnace top charging port refractory bricks. DETAILED DESCRIPTION

[0029] Embodiment 1: The water-cooled furnace roof is composed of a center circle furnace roof 1, a middle circle furnace roof 2 and an outer circle furnace roof 3; the inner end of the middle circle furnace roof 2 is connected to the center circle furnace roof 1, and the outer end of the middle circle furnace roof 2 is connected to the outer circle furnace roof 3 to form a dome structure.

[0030] The shapes of the center ring furnace top 1, the middle ring furnace top 2 and the outer ring furnace top 3 are different;

[0031] The center ring furnace top 1 is circular in shape and is one piece;

[0032] The middle furnace roof 2 and the outer furnace roof 3 are both fan-shaped, and are formed by multiple pieces being spliced ​​into a ring;

[0033] The circular ring formed by the middle circle furnace top 2 surrounds the circular circumference of the center circle furnace top 1;

[0034] The outer furnace roof 3 is spliced ​​into a circular ring which surrounds the circumference of the circular ring of the middle furnace roof 2 .

[0035] The central furnace roof 1, the middle furnace roof 2 and the outer furnace roof 3 have the same structure, and all include: a furnace roof cooling stave 2-1, a furnace roof fixing bolt 2-3, a furnace roof brick dovetail groove 2-4, a furnace roof cooling stave serpentine pipe 2-5, a furnace roof water inlet 2-6, a furnace roof water outlet 2-7 and a furnace roof refractory brick 2-8;

[0036] The furnace top cooling stave 2-1 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 formed on the furnace top cooling stave 2-1, and the furnace top fixing bolts 2-3 fix the furnace top cooling stave 2-1 to the furnace shell through the fixing hole, and the gaps between adjacent furnace top cooling staves 2-1 and between the middle circle furnace roof 2 and the outer circle furnace roof 3 formed by the furnace top cooling staves 2-1 are pressed into refractory mud to form a complete dome furnace roof;

[0037] There are two furnace roof cooling stave serpentine pipes 2-5, which are embedded in the furnace roof cooling stave 2-1 side by side. At both ends of the two furnace roof cooling stave serpentine pipes 2-5, there are furnace wall water inlet 2-6 and furnace wall water outlet 2-7 respectively, which are led out of the furnace roof cooling stave 2-1; on the back of the furnace roof cooling stave 2-1, there is a furnace roof inlay brick dovetail groove 2-4, and the furnace roof refractory brick 2-8 is inlaid on the furnace roof inlay brick dovetail groove 2-4; one end of the furnace roof refractory brick 2-8 has a dovetail tenon, and the dovetail tenon matches the furnace roof inlay brick dovetail groove 2-4.

[0038] The circular ring formed by multiple fan-shaped middle circle furnace roofs 2 includes a middle circle furnace roof 2 with a furnace top charging port 2-2; among the middle circle furnace roofs 2 spliced ​​into a circular ring, there are 1-6 fan-shaped middle circle furnace roofs 2 with a furnace top charging port 2-2; and furnace top charging port refractory bricks 2-9 are installed in the furnace top charging port 2-2.

[0039] In the circular furnace top cooling wall 3-1, two furnace top cooling wall serpentine tubes 2-5 both start from a point on the edge of the center circle furnace top 1, and are repeatedly bent horizontally to another point on the edge and terminate. The two furnace top cooling wall serpentine tubes 3-5 are arranged in a staggered manner vertically and horizontally.

[0040] In the fan-shaped furnace roof cooling stave 3-1, two furnace roof cooling stave serpentine pipes 2-5 are arranged in the same manner on the middle ring furnace roof 2 and the outer ring furnace roof 3, 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;

[0041] When the furnace top cooling wall serpentine pipe 2-5 arranged on the middle ring furnace top 2 encounters the furnace top charging port 2-2, it is arranged around the furnace top charging port 2-2.

[0042] The furnace top cooling wall body is made of cast iron or cast steel cooling wall, which is in a circular and fan-shaped block structure, with an internal cooling water pipe serpentine pipe design and high-quality cold-drawn seamless steel pipe.

Claims

1. A water-cooled roof of a secondary lead smelting furnace, characterized in that: The water-cooled furnace roof is composed of a central circle furnace roof, a middle circle furnace roof and an outer circle furnace roof; the inner end of the middle circle furnace roof is connected to the central circle furnace roof, and the outer end of the middle circle furnace roof is connected to the outer circle furnace roof to form a dome structure.

2. The water-cooled furnace roof of a secondary lead smelting furnace according to claim 1, 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.

3. The water-cooled furnace roof of a secondary lead smelting furnace according to claim 1 or 2, 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. There are two furnace roof cooling wall serpentine tubes, which are embedded in the furnace roof cooling wall side by side. The two ends of the two furnace roof cooling wall serpentine tubes are respectively provided with a furnace wall water inlet and a furnace wall water outlet, which are led out of the furnace roof cooling wall; there is a furnace roof brick dovetail groove on the back of the furnace roof cooling wall, and furnace roof refractory bricks are inlaid on the furnace roof brick dovetail groove; one end of the furnace roof refractory brick is provided with a dovetail tenon, and the dovetail tenon matches the furnace roof brick dovetail groove.

4. The water-cooled furnace roof of a secondary lead smelting furnace according to claim 2, characterized in that: 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.

5. The water-cooled furnace roof of a secondary lead smelting furnace according to claim 3, 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.

6. The water-cooled furnace roof of a secondary lead smelting furnace according to claim 3, 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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