Flash furnace top water jacket for nickel pyrometallurgy

Abstract

The utility model provides a flash furnace top water jacket for nickel pyrometallurgy, which comprises a water jacket body, a first heat exchange water pipe is arranged in the water jacket body, the first heat exchange water pipe comprises two U-shaped pipes which are connected in series, a second heat exchange water pipe is arranged at the side part of the first heat exchange water pipe, the second heat exchange water pipe is U-shaped, and the water jacket body is provided with a water inlet and a water outlet. A U-shaped groove is formed in the water jacket body, a first heat exchange water pipe is arranged in the U-shaped groove in a surrounding mode, heat exchange water pipe bases are arranged at the ends of the first heat exchange water pipe and a second heat exchange water pipe, a plurality of grooves which are horizontally arranged are formed in the bottom of the water jacket body, the grooves are in a trapezoid shape, and a plurality of refractory bricks which are horizontally arranged are arranged at the bottoms of the grooves. A plurality of lifting lugs are arranged on the top surface of the water jacket body, and the two ends of the lifting lugs are inserted into the water jacket body. The heat exchanger is simple in structure, convenient to install and good in heat exchange effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of metallurgical equipment, and relates to a flash furnace roof water jacket for nickel pyrometallurgy. Background Art

[0002] In modern nickel pyrometallurgy, the flash furnace plays an important role. The flash furnace generally consists of four parts: a reaction tower, a settling tank, a smelting zone, and a rising flue. Among them, the settling tank is the area where the matte and slag are initially deposited and separated. The top of the settling tank is an inverted arch to reduce the downward heat transfer of high-temperature gas flow to the molten pool and the amount of soot entering the flue. Therefore, the arch roof of the settling tank is severely scoured by the flue gas, and the service life of the water-cooled parts is crucial.

[0003] At present, the arch roof of the flash furnace settling tank generally consists of a suspended cast copper water jacket and suspended bricks. However, this structure has poor heat exchange effect. Especially after long-term use, the surface of the arch roof is severely fouled and difficult to clean, further affecting the heat exchange effect, resulting in the arch roof burning through or even collapsing. This phenomenon is particularly serious on the side of the rising flue. Subsequently, some enterprises improved this structure by using dovetail suspended flat water jackets to increase the heat exchange effect, but problems such as frequent redness and perforation of the water jackets occurred, and the service life of the water jackets was less than one year. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a flash furnace roof water jacket for nickel pyrometallurgy to increase the heat exchange effect of the water-cooled parts on the arch roof of the settling tank and improve the service life of the water-cooled parts in view of the problems existing in the prior art.

[0005] The utility model adopts the following technical solutions:

[0006] A flash furnace roof water jacket for nickel pyrometallurgy includes a water jacket body. A first heat exchange water pipe is arranged inside the water jacket body. The first heat exchange water pipe includes two or more U-shaped pipes arranged in series. A second heat exchange water pipe is arranged on its side. The second heat exchange water pipe is U-shaped and encloses the first heat exchange water pipe in a U-shaped groove. A number of grooves arranged horizontally are provided at the bottom of the water jacket body. The grooves are trapezoidal, and a number of refractory bricks arranged horizontally are provided at their bottoms. A number of lifting lugs are provided on the top surface of the water jacket body, and both ends of the lifting lugs are inserted into the water jacket body.

[0007] Further, the upper base length of the groove is 60 - 65 mm, the lower base length is 70 - 75 mm, the height is 40 - 45 mm, and the center line distance between two adjacent grooves is 100 - 105 mm.

[0008] Further, both the first heat exchange water pipe and the second heat exchange water pipe are buried inside the water jacket body. The pipe diameters of both are 45 - 50 mm, and the wall thicknesses of both are 5 - 6 mm.

[0009] Furthermore, the closest horizontal distance between the first heat exchange water pipe and the second heat exchange water pipe is 100 mm, and the distance between the second heat exchange water pipe and the outer edge of the water jacket body is 70 - 80 mm.

[0010] Furthermore, the part of the first heat exchange water pipe (3) and the second heat exchange water pipe (4) extending out of the water jacket body is provided with a heat exchange water pipe seat (6), whose diameter is 1.5 - 2.0 times that of the heat exchange water pipe and the thickness is 40 - 70 mm.

[0011] Furthermore, the lifting lug is in an inverted U shape, and the depth of its two ends inserted into the water jacket body is 90 - 100 mm.

[0012] Furthermore, the refractory brick includes a cube, and the top of the cube is provided with a protrusion, and the protrusion is in an inverted trapezoid shape and just fits into the groove.

[0013] The beneficial effects of the present utility model are as follows:

[0014] By improving the water jacket structure and the arrangement of the heat exchange pipes, the heat exchange effect of the water jacket is improved. In addition, by installing refractory bricks at the bottom of the water jacket, the direct erosion of the high-temperature corrosive flue gas on the water jacket body is reduced, and slag is more likely to adhere to the surface of the refractory bricks, which is beneficial to improving the service life of the water jacket. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the front view structural schematic diagram of the present utility model;

[0016] Figure 2 is the top view structural schematic diagram of the present utility model.

[0017] In the figure, 1 - groove, 2 - lifting lug, 3 - first heat exchange water pipe, 4 - second heat exchange water pipe, 5 - refractory brick, 6 - heat exchange water pipe seat. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The technical solutions of the present utility model will be described in detail below in conjunction with the drawings and the embodiments.

[0019] As Figure 1 and 2 shown, a flash furnace roof water jacket for nickel pyrometallurgy includes a water jacket body. The inside of the water jacket body is provided with a first heat exchange water pipe 3. The first heat exchange water pipe 3 includes two U-shaped pipes arranged in series, and a second heat exchange water pipe 4 is provided on its side. The second heat exchange water pipe 4 is in a U shape and encloses the first heat exchange water pipe 3 in a U-shaped groove.

[0020] Specifically, both the first heat exchange water pipe 3 and the second heat exchange water pipe 4 are buried inside the water jacket body, and the pipe diameters of both are 45 - 50 mm and the wall thicknesses are both 5 - 6 mm.

[0021] The closest horizontal distance between the first heat exchange water pipe 3 and the second heat exchange water pipe 4 is 100 mm, and the distance between the second heat exchange water pipe 4 and the outer edge of the water jacket body is 70 - 80 mm.

[0022] On the part of the first heat exchange water pipe 3 and the second heat exchange water pipe 4 extending out of the water jacket body, there is a heat exchange water pipe seat 6, whose diameter is 1.5 - 2.0 times that of the heat exchange water pipe and the thickness is 40 - 70 mm.

[0023] At the bottom of the water jacket body, there are several grooves 1 arranged horizontally. The grooves 1 are trapezoidal, with the upper base length being 60 - 65 mm, the lower base length being 70 - 75 mm, and the height being 40 - 45 mm. The center line distance between two adjacent grooves 1 is 100 - 105 mm.

[0024] At the bottom of the grooves 1, there are several refractory bricks 5 arranged horizontally. Specifically, the refractory bricks 5 include a cube, and there is a protrusion on the top of the cube. The protrusion is an inverted trapezoid and fits exactly with the grooves 1.

[0025] On the top surface of the water jacket body, there are several lifting lugs 2, and both ends of which are inserted into the water jacket body. Specifically, the lifting lugs 2 are in an inverted U shape, and the depth of both ends inserted into the water jacket body is 90 - 100 mm.

[0026] The usage process of the present utility model is as follows:

[0027] During the casting of the water jacket, the lifting lugs 2, the first heat exchange water pipe 3 and the second heat exchange water pipe 4 are pre - embedded in the mold. Among them, the depth of the lifting lugs 2 inserted into the water jacket body is adjusted according to the thickness of the water jacket body, but not greater than the insertion depth of the first heat exchange water pipe 3 and the second heat exchange water pipe 4; the number of U - shaped pipes connected in series in the first heat exchange water pipe 3 is increased according to the required heat exchange needs; the pipe diameters of the first heat exchange water pipe 3 and the second heat exchange water pipe 4 are adjusted according to the pipe diameters of the pipes connected on - site, and the two are on the same horizontal plane; finally, the heat exchange water pipe seat 6 is cast into shape.

[0028] After the casting of the water jacket body is completed, grooves 1 are machined at the bottom of the water jacket. The dimensions of the grooves 1 are adjusted according to the dimensions of the water jacket body to ensure that the number of grooves 1 is an integer.

[0029] Before the installation of the water jacket, refractory bricks 5 are inlaid at the grooves 1, and the hoisting tool is connected to the lifting lugs 2 to adjust and fix the position of the water jacket. Compared with the prior art, the lifting lugs 2 can be used as both hoisting points and hanging points, without the need to additionally add hanging points by drilling holes around the water jacket; the arrangement and diameter of the first heat exchange water pipe 3 and the second heat exchange water pipe 4 are flexibly adjusted according to the radiation intensity to ensure the cooling intensity of the water jacket; the refractory bricks 5 inlaid at the bottom avoid the direct scouring of the high - temperature corrosive flue gas on the water jacket body, and are conducive to slag hanging, playing a protective role for the water jacket body. And during the maintenance, only the refractory bricks 5 need to be replaced.

Claims

1. A flash furnace roof water jacket for nickel pyrometallurgy, characterized in that, It includes a water jacket body, inside which there is a first heat exchange water pipe (3). The first heat exchange water pipe (3) includes two or more U-shaped pipes arranged in series. A second heat exchange water pipe (4) is provided on its side. The second heat exchange water pipe (4) is U-shaped and surrounds the first heat exchange water pipe (3) in a U-shaped groove. A number of grooves (1) arranged horizontally are provided at the bottom of the water jacket body. The grooves (1) are trapezoidal, and a number of refractory bricks (5) arranged horizontally are provided at their bottoms. A number of lifting lugs (2) are provided on the top surface of the water jacket body, and both ends of which are inserted into the water jacket body.

2. The flash furnace roof water jacket for nickel pyrometallurgy according to claim 1, characterized in that, The upper bottom edge length of the groove (1) is 60 - 65 mm, the lower bottom edge length is 70 - 75 mm, and the height is 40 - 45 mm. The center line distance between two adjacent grooves (1) is 100 - 105 mm.

3. The flash furnace roof water jacket for nickel pyrometallurgy according to claim 1, characterized in that Both the first heat exchange water pipe (3) and the second heat exchange water pipe (4) are buried inside the water jacket body. The pipe diameters of both are 45 - 50 mm, and the pipe wall thicknesses of both are 5 - 6 mm.

4. A flash furnace roof water jacket for nickel pyrometallurgy according to claim 1, characterized in that, The closest horizontal distance between the first heat exchange water pipe (3) and the second heat exchange water pipe (4) is 100 mm. The distance between the second heat exchange water pipe (4) and the outer edge of the water jacket body is 70 - 80 mm.

5. A flash furnace roof water jacket for nickel pyrometallurgy according to claim 1, characterized in that, The part of the first heat exchange water pipe (3) and the second heat exchange water pipe (4) extending out of the water jacket body is provided with a heat exchange water pipe seat (6), whose diameter is 1.5 - 2.0 times the diameter of the heat exchange water pipe, and the thickness is 40 - 70 mm.

6. The flash furnace roof water jacket for nickel pyrometallurgy according to claim 1, characterized in that, The lifting lug (2) is inverted U-shaped, and the depth of both ends inserted into the water jacket body is 90 - 100 mm.

7. The flash furnace roof water jacket for nickel pyrometallurgy according to claim 1, characterized in that, The refractory brick (5) includes a cube, and a protrusion is provided on the top of the cube. The protrusion is inverted trapezoidal and just fits with the groove (1).

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