CN219551131U

CN219551131U - Furnace mouth protection device of reverberatory furnace

Info

Publication number: CN219551131U
Application number: CN202320545135.0U
Authority: CN
Inventors: 袁辅平; 童悦; 胡航
Original assignee: Daye Nonferrous Metals Co Ltd
Current assignee: Daye Nonferrous Metals Co Ltd
Priority date: 2023-03-20
Filing date: 2023-03-20
Publication date: 2023-08-18
Anticipated expiration: 2033-03-20

Abstract

The utility model discloses a reverberatory furnace mouth protection device, which is provided with a reverberatory furnace, wherein a furnace mouth is arranged on the reverberatory furnace, a heat-insulating brick and a furnace mouth bottom brick are arranged at the lower end of the furnace mouth, and the heat-insulating brick is positioned at the outer side of the furnace mouth bottom brick; the insulating brick outside the hearth brick is provided with a cooling assembly, and the cooling assembly comprises: a plate cooler, the plate cooler comprising: the cooling water pipe is of a U-shaped structure, one end of the cooling water pipe is provided with a water inlet pipe, and the other end of the cooling water pipe is provided with a water outlet pipe for reducing the temperature of the bottom brick of the furnace mouth; the utility model has the characteristics of simple structure and low manufacturing cost; after the device is applied, the bottom bricks of the furnace mouth of the refining reverberatory furnace are effectively protected, the overhaul period of the bottom bricks of the furnace mouth is prolonged, the overhaul indirect cost and the direct cost are greatly saved, and the effects of prolonging the service life of the refining reverberatory furnace and reducing the operation cost are facilitated.

Description

Furnace mouth protection device of reverberatory furnace

Technical Field

The utility model relates to the technical field of reclaimed copper refining reverberatory furnaces, in particular to a reverberatory furnace mouth protection device.

Background

The secondary copper refining reverberatory furnace is provided with square holes at the furnace wall, called a "furnace mouth", see fig. 1. The furnace mouth is used for adding cold copper raw materials into the furnace; and secondly, a reducing pipe is inserted into the furnace during refining operation. The refining reverberatory furnace is provided with a plurality of furnace openings, and the furnace openings are shielded by furnace opening working doors when not in use.

The thickness of the refractory brick layer in the furnace mouth area of the refining reverberatory furnace is 300mm and 460mm, and maintenance is arranged after 50% loss: otherwise, copper liquid possibly invades into an outer insulating brick layer through the worn refractory bricks, so that copper leakage is caused; the bearing capacity of the refractory brick layer is reduced, and the furnace roof cannot be reliably supported to cause deformation and collapse of the furnace roof.

Along with the popularization and application of the dilute oxygen combustion technology and the high-strength reduction technology of the refining reverberatory furnace, a furnace mouth periphery molten pool is taken as a main reaction zone, the thermal strength of copper liquid is multiplied, so that overheating phenomenon of a furnace mouth bottom brick (refractory bricks right below the furnace mouth zone) occurs, the brick body loss speed is correspondingly and sharply increased, and an obvious loss zone appears: the thickness loss of the refractory bricks in the range of the loss zone is up to 10 mm/heat to 30 mm/heat. Even if the furnace mouth bottom brick adopts 460mm long bricks, the thickness loss of the part of the furnace mouth bottom brick in the loss zone after 8 times of production reaches 240mm and exceeds 50%, and the furnace mouth bottom brick is at risk for furnace body structure and safe production and needs to be shut down for maintenance. The 'loss zone' of the 'bottom brick of the furnace mouth' is overhauled, the direct cost is not high, and the main cost is 1-3 tons of refractory material consumption; however, the furnace mouth bottom brick has high furnace shutdown maintenance frequency, and each maintenance time takes more than 3 days, so that great influence is caused on the production organization of enterprises (the furnace shutdown of the refining reverberatory furnace is usually 90-150 times of minor maintenance period); the indirect cost of overhauling the bottom bricks of the furnace mouth is high (the furnace is restarted after each overhauling, and the cost of restarting the furnace is more than 3 ten thousand yuan); frequent overhauling and furnace shutdown and furnace opening cause damage to refractory bricks of the refining reverberatory furnace, and the service life of the furnace is deteriorated.

Disclosure of Invention

The utility model aims to solve the problems and provides a reverberatory furnace mouth protection device.

The specific scheme of the utility model is as follows: the furnace mouth protection device of the reverberatory furnace is provided with a furnace mouth, wherein the reverberatory furnace is provided with a furnace mouth, the lower end of the furnace mouth is provided with a heat-insulating brick and a furnace mouth bottom brick, and the heat-insulating brick is positioned outside the furnace mouth bottom brick; the insulating brick outside the hearth brick is provided with a cooling assembly, and the cooling assembly comprises: the cooling device of the flat plate is provided with a cooling device,

the flat plate cooler includes: the cooling water pipe is of a U-shaped structure, one end of the cooling water pipe is provided with a water inlet pipe, and the other end of the cooling water pipe is provided with a water outlet pipe for reducing the temperature of the bottom bricks of the furnace mouth.

Further, the heat conducting plate is made of pure copper.

Furthermore, the cooling water pipe is a seamless copper pipe.

Further, the cooling assembly further comprises: the square tube coolers are mutually communicated and are positioned between the flat plate cooler and the furnace mouth; the square tube cooler includes: the utility model discloses a square cavity, fang Xingqiang room middle part is equipped with the baffle, the baffle separates square cavity into cavity and lower cavity, it communicates at the baffle end to go up cavity and lower cavity, the lower cavity outside is equipped with the water inlet, be equipped with the inlet tube on the water inlet, it is equipped with the delivery port to go up the cavity outside, be equipped with the outlet pipe on the delivery port.

Further, all be equipped with detection device on cooling module's inlet tube and the outlet pipe, detection device includes: water pressure meter, flowmeter, thermometer.

The utility model has the beneficial effects that: the flat cooler has strong heat dissipation capability and higher manufacturing cost, and is arranged at a position close to the bottom brick of the furnace mouth with high overheat degree; the square tube cooler has relatively small heat dissipation capacity and low manufacturing cost, and is arranged at a position close to the bottom brick of the furnace mouth, and the degree of overheating is not high; the plate cooler and the square tube cooler are combined for use, the cooling efficiency is ensured by a cooling mode of combining points and surfaces, and the number of cooling elements and the corresponding manufacturing cost are controlled; after the refining reverberatory furnace mouth protecting device is applied, the bottom bricks of the refining reverberatory furnace mouth can be effectively protected, so that the overhaul period of the bottom bricks of the refining reverberatory furnace can be prolonged to more than 150 times, the overhaul indirect cost is greatly saved, and the refining reverberatory furnace is beneficial to prolonging the service life of the refining reverberatory furnace and reducing the running cost.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic cross-sectional view of A-A of FIG. 1;

FIG. 3 is an enlarged view of a portion at N of FIG. 1;

FIG. 4 is a schematic front view of a plate cooler;

FIG. 5 is a schematic cross-sectional view of B-B of FIG. 4;

FIG. 6 is a schematic front view of a square tube cooler;

FIG. 7 is a schematic cross-sectional view of C-C of FIG. 6;

FIG. 8 is a schematic diagram of a prior art structure;

FIG. 9 is a schematic cross-sectional view of section D-D of FIG. 8;

in the figure: 1. a reverberatory furnace; 2. a furnace mouth; 3. a plate cooler; 301. a heat conductive plate; 302. a cooling water pipe; 4. a square tube cooler; 401. a square chamber; 402. a partition plate; 403. an upper chamber; 404. a lower chamber; 405. a water outlet; 406. a water inlet; 5. a detection device; 6. a heat preservation brick; 7. bottom bricks of furnace mouth.

Description of the embodiments

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The secondary copper refining reverberatory furnace 1 is provided with square holes at the furnace wall, called a furnace mouth 2, see fig. 8-9. The furnace mouth 2 is used for adding cold copper raw materials into the furnace; and secondly, a reducing pipe is inserted into the furnace during refining operation. The refining reverberatory furnace 1 is provided with a plurality of furnace openings 2, and the furnace openings 2 are blocked by working doors of the furnace openings 2 when the furnace openings 2 are not used.

The thickness of the refractory brick layer in the area of the furnace mouth 2 of the refining reverberatory furnace 1 is 300mm and 460mm, and after 50% loss, maintenance is arranged: otherwise, copper liquid possibly invades the outer insulating brick 6 layer through the worn refractory bricks, so that copper leakage is caused; the bearing capacity of the refractory brick layer is reduced, and the furnace roof cannot be reliably supported to cause deformation and collapse of the furnace roof.

Along with the popularization and application of the dilute oxygen combustion technology and the high-strength reduction technology of the refining reverberatory furnace 1, a molten pool around the furnace mouth 2 is taken as a main reaction zone, the thermal strength of copper liquid is multiplied, so that overheating phenomenon occurs on a furnace mouth bottom brick 7 (refractory bricks right below the furnace mouth 2 area), the brick body loss speed is correspondingly and sharply increased, and an obvious loss zone appears: the thickness loss of the refractory bricks in the range of the loss zone is up to 10 mm/heat to 30 mm/heat. Even if the furnace mouth bottom brick 7 adopts 460mm long bricks, the thickness loss of the furnace mouth bottom brick 7 of the part of the waste area after 8 times of production reaches 240mm and exceeds 50 percent, which forms risks for furnace body structure and safe production and needs to be shut down for maintenance. The 'loss zone' of the 'furnace mouth bottom brick 7' is overhauled, the direct cost is not high, and the main cost is 1-3 tons of refractory material consumption; however, the furnace mouth bottom brick 7 has high furnace shutdown maintenance frequency, takes more than 3 days for each maintenance, and has great influence on the production organization of enterprises (the furnace shutdown of the refining reverberatory furnace 1 is carried out for a minor maintenance period of 90-150 times); the indirect cost of overhauling the bottom brick 7 of the furnace mouth is high (the furnace is restarted after each overhauling, and the cost of restarting the furnace is more than 3 ten thousand yuan); frequent overhauling and furnace shutdown and furnace opening cause damage to refractory bricks of the refining reverberatory furnace 1, and the service life of the furnace is deteriorated.

Referring to fig. 1-7, a reverberatory furnace mouth protection device is provided with a reverberatory furnace 1, wherein a furnace mouth 2 is arranged on the reverberatory furnace 1, a heat-insulating brick 6 and a furnace mouth bottom brick 7 are arranged at the lower end of the furnace mouth 2, and the heat-insulating brick 6 is positioned outside the furnace mouth bottom brick 7; the insulating brick 6 outside the hearth brick 7 is provided with a cooling assembly, and the cooling assembly comprises: the plate cooler 3 is provided with a cooling device,

the flat plate cooler 3 includes: the heat conduction plate 301, be equipped with cooling water pipe 302 in the heat conduction plate 301, cooling water pipe 302 is U type structure, cooling water pipe one end is equipped with the inlet tube, and the other end is equipped with the outlet pipe for reduce the temperature of furnace mouth bottom brick 7.

In this embodiment, the heat conducting plate 301 is made of pure copper.

In this embodiment, the cooling water pipe 302 is a seamless copper pipe.

In this embodiment, the cooling assembly further includes: a plurality of square tube coolers 4 which are mutually communicated, wherein the square tube coolers 4 are positioned between the flat plate cooler 3 and the furnace mouth 2; the square tube cooler 4 includes: fang Xingqiang room 401, square cavity 401 middle part is equipped with baffle 402, baffle 402 separates square cavity 401 into cavity 403 and lower cavity 404, cavity 403 and lower cavity 404 are in baffle 402 end intercommunication down, the lower cavity 404 outside is equipped with water inlet 406, be equipped with the inlet tube on the water inlet 406, the cavity 403 outside is equipped with delivery port 405 on the upper cavity 403, be equipped with the outlet pipe on the delivery port 405.

In this embodiment, all be equipped with detection device 5 on cooling module's inlet tube and the outlet pipe, detection device 5 includes: water pressure meter, flowmeter, thermometer.

The utility model has the beneficial effects that: the plate cooler 3 has strong heat dissipation capability and high manufacturing cost, and is arranged at a position close to the bottom brick 7 with high overheat degree; the square tube cooler 4 has relatively small heat dissipation capacity and low manufacturing cost, and is arranged at a position close to the bottom brick 7 of the furnace mouth, and the degree of overheating is not high; the plate cooler 3 and the square tube cooler 4 are combined for use, the cooling efficiency is ensured by a point-surface combined cooling mode, and the number of cooling elements and the corresponding manufacturing cost are controlled; after the protective device for the furnace mouth 2 of the refining reverberatory furnace 1 is applied, the furnace mouth bottom bricks 7 of the refining reverberatory furnace 1 can be effectively protected, so that the overhaul period of the furnace mouth bottom bricks 7 is prolonged to more than 150 times, the overhaul indirect cost is greatly saved, and the service life of the refining reverberatory furnace 1 is prolonged and the running cost is reduced.

Specifically, the flat cooler 3 is a buried pipe casting copper water jacket, and is shaped like a flat plate with the thickness of 75mm. The body of the flat cooler 3 is made of pure copper, cu is more than or equal to 99.5 percent, a buried pipe method is adopted, and a phi 32 mm seamless red copper pipe is cast in as the cooling water pipe 302. The buried pipe of the flat cooler 3 is connected with a water inlet pipe and a water outlet pipe, and soft water is introduced for cooling.

The square tube cooler 4 is a 150 multiplied by 410 mm cavity type square tube water jacket, the body is made of pure copper, cu is more than or equal to 99.5%, the outer end part is provided with a water inlet 406 of phi 22 mm, and a water outlet 405 of phi 22 mm, which are respectively connected with a water inlet pipe and a water outlet pipe, and soft water is introduced for cooling. Soft water flows in from the lower water inlet 406 and flows out from the upper water outlet 405, 3 square tube coolers 4 are uniformly arranged on the same level, and the water tubes are connected in series to form a group.

Before the flat-plate cooler 3 and the square-tube cooler 4 are installed, appearance inspection and hydrostatic test are carried out, the flat-plate cooler 3 is also required to be subjected to ball passing inspection, and the qualified inspection can be used.

The "detecting device 5" is one of a water pressure meter, a flowmeter and a thermometer. The water inlet pipe and the water outlet pipe of a piece of flat plate cooler 3 are respectively provided with a set of detection device 5. The water inlet pipe and the water outlet pipe of the square pipe cooler 4 are respectively provided with a set of detection device 5.

The flat plate cooler 3 and the square tube cooler 4 are horizontally arranged in the insulating brick 6 layer outside the furnace mouth bottom brick 7 and are clung to the furnace mouth bottom brick 7.

The utility model relates to a use method of a protecting device for a furnace mouth 2 of a refining reverberatory furnace 1, which comprises the following steps: during the production of the refining reverberatory furnace 1, soft water is introduced into the flat plate cooler 3 and the square tube cooler 4, the soft water circularly flows to take away heat, and the furnace mouth bottom brick 7 is cooled by utilizing the characteristics that the bodies of the flat plate cooler 3 and the square tube cooler 4 are copper and the heat conduction capacity is strong, so that the furnace mouth bottom brick 7 is prevented from being overheated and the strength of the brick body is prevented from being reduced to be damaged; meanwhile, after the surface temperature of the furnace mouth bottom brick 7 is reduced, a furnace knot layer with the thickness of 30 mm-50 mm is formed, the furnace knot is compact and has high specific gravity, the furnace mouth bottom brick 7 and copper liquid can be isolated, and the furnace mouth bottom brick 7 is a protective layer.

By timing comparison of parameters of the water inlet pipe detection device 5 and the water outlet pipe detection device 5, whether the working states of the flat plate cooler 3 and the square tube cooler 4 are abnormal or not is timely found and treated through temperature, flow and pressure changes of soft water. The temperature difference of soft water of the water inlet pipe and the water outlet pipe is controlled to be 2-6 ℃, the deviation of soft water flow is less than 5%, and the water pressure is 0.3-0.35 MPa.

The "plate cooler 3" is placed close to the "bottom bricks 7" where the degree of overheating is high. The square tube cooler 4 has relatively small heat dissipation capacity and low cost, and is arranged at a position close to the furnace mouth bottom brick 7 with low degree of overheat. The "plate cooler 3" is used in combination with the "square tube cooler 4" to perform a point-surface-combined cooling method for the "bottom bricks 7".

Claims

1. The furnace mouth protection device of the reverberatory furnace is provided with a furnace mouth, wherein the reverberatory furnace is provided with a furnace mouth, the lower end of the furnace mouth is provided with a heat-insulating brick and a furnace mouth bottom brick, and the heat-insulating brick is positioned outside the furnace mouth bottom brick; the method is characterized in that: the insulating brick outside the hearth brick is provided with a cooling assembly, and the cooling assembly comprises: the cooling device of the flat plate is provided with a cooling device,

2. The reverberatory furnace mouth protection apparatus according to claim 1, characterized in that: the heat conducting plate is made of pure copper.

3. The reverberatory furnace mouth protection apparatus according to claim 2, characterized in that: the cooling water pipe is a seamless copper pipe.

4. The reverberatory furnace mouth protection apparatus according to claim 1, characterized in that: the cooling assembly further includes: the square tube coolers are mutually communicated and are positioned between the flat plate cooler and the furnace mouth; the square tube cooler includes: the utility model discloses a square cavity, fang Xingqiang room middle part is equipped with the baffle, the baffle separates square cavity into cavity and lower cavity, it communicates at the baffle end to go up cavity and lower cavity, the lower cavity outside is equipped with the water inlet, be equipped with the inlet tube on the water inlet, it is equipped with the delivery port to go up the cavity outside, be equipped with the outlet pipe on the delivery port.

5. The reverberatory furnace mouth protection apparatus according to claim 1, characterized in that: the inlet tube and the outlet pipe of cooling module are all equipped with detection device, detection device includes: water pressure meter, flowmeter, thermometer.