CN219531677U - Flash converting furnace - Google Patents

Abstract

The utility model relates to the technical field of metallurgical furnaces, in particular to a flash converting furnace, which comprises a sedimentation tank, a reaction tower and an ascending flue, wherein the reaction tower and the ascending flue are positioned at the upper end of the sedimentation tank and are communicated with the sedimentation tank, a cold material opening used for feeding cold material and communicated with the inner cavity of the sedimentation tank is arranged on the top or the furnace wall of the sedimentation tank, the cold material opening is positioned in the middle part between the reaction tower and the ascending flue, a blister copper layer and a slag layer are sequentially arranged at the bottom of the inner cavity of the sedimentation tank from bottom to top, the thickness of the blister copper layer is not less than 800mm, and the thickness of the slag layer is not less than 300mm. According to the utility model, the cold material port is arranged on the sedimentation tank, so that cold material can be thrown into the inner cavity of the sedimentation tank from the cold material port, and the heat balance inside the flash converting furnace with high productivity is realized, and the overheat condition of the sedimentation tank is avoided; the kinetic energy of the cold material in contact with the furnace bottom can be reduced by controlling the thickness of the blister copper layer, the service life of the furnace bottom refractory material is prolonged, and the copper content of the slag can be reduced by controlling the thickness of the slag layer.

Description

Flash converting furnace

Technical Field

The utility model relates to the technical field of metallurgical furnaces, in particular to a flash converting furnace.

Background

The flash converting furnace is one metallurgical furnace in double flash process and converting section, and has the main functions of spraying solid granular copper matte produced through flash smelting furnace and slag forming agent together with 75-90% oxygen enriched air into the reaction tower via concentrate nozzle and completing copper making and slag forming reaction in high temperature oxidizing environment. The flash converting process is widely used because of the advantages of advanced process, low comprehensive energy consumption, good operation environment, high continuous operation rate, high single furnace yield and the like. The single-furnace productivity is also increased from 10 ten thousand tons/year to 20 ten thousand tons/year, 30 ten thousand tons/year and 40 ten thousand tons/year.

At present, the double flash processes at home and abroad are provided with special devices for melting the anode scrap and part of cold materials, and the process is long and the energy consumption is high. From theoretical calculation and practice, when the single furnace capacity of the flash converting furnace exceeds 45 ten thousand tons/year, the phenomena of high copper content of slag, overheating of a sedimentation tank and the like exist; when the materials enter the reaction tower, the materials react in the gas phase area and settle into the inner cavity of the sedimentation tank, and the flue gas flows from the end of the reaction tower to the end of the rising flue, so that the temperature of the melt in the sedimentation tank in the lower area between the reaction tower and the rising flue is higher, and particularly when the single-furnace energy is more than or equal to 45 ten thousand tons per year, the problem of higher melt temperature is more remarkable.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a flash converting furnace.

The utility model provides the following technical scheme that the flash converting furnace comprises a sedimentation tank, a reaction tower and a rising flue, wherein the reaction tower and the rising flue are positioned at the upper end of the sedimentation tank and are communicated with the sedimentation tank, a cold material opening used for feeding cold materials and communicated with an inner cavity of the sedimentation tank is arranged on a furnace top or a furnace wall of the sedimentation tank, the cold material opening is positioned in the middle between the reaction tower and the rising flue, a blister copper layer and a slag layer are sequentially arranged at the bottom of the inner cavity of the sedimentation tank from bottom to top, the thickness of the blister copper layer is not less than 800mm, and the thickness of the slag layer is not less than 300mm.

According to the utility model, the cold material port is arranged at the upper end of the sedimentation tank, so that cold material can be thrown into the inner cavity of the sedimentation tank from the cold material port, and the heat balance inside the flash converting furnace with high productivity is realized, and the situation that the sedimentation tank is overheated is avoided; because the cold material falls into a molten pool in the sedimentation tank from a high position, the material has certain kinetic energy, and the material which is sunk into the molten pool is prevented from crashing the refractory material at the bottom of the furnace, thereby affecting the safe operation of the sedimentation tank, the thickness of a blister copper layer is increased to not less than 800mm, the kinetic energy when the cold material contacts with the bottom of the furnace is reduced, and the service life of the refractory material at the bottom of the furnace is prolonged; due to the addition of a large amount of cold materials, the melt in the sedimentation tank is stirred, which affects the sedimentation of copper in the slag layer, so that the clarification time of the slag layer can be improved and the copper content of the slag layer can be reduced by increasing the thickness of the slag layer to be not less than 300 mm; the flash converting furnace provided by the utility model can be suitable for higher single-furnace productivity and has higher safety.

Further, the cold material port is arranged on the furnace top of the sedimentation tank, the cold material port is vertical to the furnace top, and the cold material port is positioned at the center of the furnace top between the reaction tower and the rising flue.

Further, the cold material port is arranged on the furnace top of the sedimentation tank, the cold material port and the furnace top are obliquely arranged, and the cold material port is positioned at the rear side of the central axis of the furnace top between the reaction tower and the rising flue.

Further, the cold material port is arranged at the upper end of the furnace wall at the side end of the sedimentation tank, and the lower end of the cold material port is obliquely downwards arranged.

Further, the furnace top of the sedimentation tank is composed of a first copper water jacket and a refractory brick layer, the first copper water jacket is sleeved on the refractory brick layer, the lower end face of the first copper water jacket is in a zigzag shape, and the upper end face of the refractory brick layer is matched with the upper end face of the refractory brick layer.

Further, the vertical distance from the cold material port to the upper end face of the slag layer is larger than 600mm.

Further, the side wall of the cold material port is a second copper water jacket.

Further, the section of the bottom of the inner cavity of the sedimentation tank is of a concave arc-shaped structure.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic cross-sectional view of a first embodiment of the present utility model;

FIG. 2 is an enlarged schematic view of portion A of FIG. 1;

FIG. 3 is a schematic side sectional view of a sedimentation tank according to a first embodiment of the present utility model;

FIG. 4 is a schematic side sectional view of a sedimentation tank according to a second embodiment of the present utility model;

fig. 5 is a schematic side sectional view of a sedimentation tank according to a third embodiment of the present utility model.

Reference numerals illustrate:

10. a sedimentation tank; 11. a cold material port; 111. a second copper water jacket; 12. a blister copper layer; 13. a slag layer; 14. a first copper water jacket; 15. refractory bricks; 16. a furnace roof; 17. a furnace wall; 20. a reaction tower; 30. and (5) raising the flue.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and intended to illustrate embodiments of the utility model and should not be construed as limiting the utility model.

In the description of the embodiments of the present utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the embodiments of the present utility model and simplify description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are 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 one or more such feature. In the description of the embodiments of the present utility model, the meaning of "plurality" is two or more, unless explicitly defined otherwise.

In the embodiments of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and include, for example, either permanently connected, removably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present utility model will be understood by those of ordinary skill in the art according to specific circumstances.

Referring to fig. 1 to 3, in one embodiment of the present utility model, a flash converting furnace includes a settling tank 10, a reaction tower 20, and a rising flue 30, wherein the reaction tower 20 and the rising flue 30 are located at an upper end of the settling tank 10 and are communicated with each other, a cold material port 11 for feeding cold material and communicating with an inner cavity of the settling tank 10 is formed on a top or a furnace wall of the settling tank 10, the cold material port 11 is located in a middle part between the reaction tower 20 and the rising flue 30, the inner cavity of the settling tank 10 is sequentially provided with a blister copper layer 12 and a slag layer 13 from bottom to top, a thickness of the blister copper layer 12 is not less than 800mm, and a thickness of the slag layer 13 is not less than 300mm.

According to the utility model, the cold material port 11 is arranged at the upper end of the sedimentation tank 10, so that cold material can be poured into the inner cavity of the sedimentation tank 10 from the cold material port 11, thereby realizing heat balance in the flash converting furnace with high productivity and avoiding the overheat condition of the sedimentation tank 10; because the cold material falls into the molten pool in the sedimentation tank 10 from the high position, the material has certain kinetic energy, in order to avoid the material which is sunk into the molten pool from damaging the refractory material at the bottom of the furnace, thereby affecting the safe operation of the sedimentation tank 10, the thickness of the blister copper layer 12 is increased to not less than 800mm, the kinetic energy when the cold material contacts with the bottom of the furnace is reduced, and the service life of the refractory material at the bottom of the furnace is prolonged; due to the addition of a large amount of cold charge, the melt in the sedimentation tank 10 is stirred, which affects the sedimentation of copper in the slag layer 13, so that the clarification time of the slag layer 13 can be improved and the copper content of slag can be reduced by increasing the thickness of the slag layer 13 to not less than 300 mm; the flash converting furnace provided by the utility model can be suitable for higher single-furnace productivity and has higher safety.

In the present utility model, a plurality of cold material ports 11 may be provided, and in this embodiment, one cold material port 11 is provided; the cold material is anode scrap or solid material below 50mm, including but not limited to copper-containing materials such as solid beryllium, copper rice, copper wire and the like; in this embodiment, the thickness of the blister copper layer 12 is 900mm, when the thickness of the blister copper layer 12 exceeds 900mm by a certain amount, a blister copper discharge port on the furnace wall can be opened to discharge part of blister copper, but the thickness of the blister copper layer 12 is required to be ensured to be greater than or equal to 900mm; the thickness of the slag layer 13 is 350mm, when the thickness of the slag layer 13 exceeds 350mm by a certain amount, a slag discharge port on the furnace wall can be opened to discharge part of slag, and the thickness of the slag layer 13 is only required to be more than or equal to 350 mm.

The furnace top 16 of the sedimentation tank 10 consists of a first copper water jacket 14 and a refractory brick 15 layer, the first copper water jacket 14 is sleeved on the refractory brick 15 layer, the lower end surface of the first copper water jacket 14 is in a zigzag shape, the upper end surface of the refractory brick 15 layer is matched with the first copper water jacket, the first copper water jacket 14 can effectively cool the refractory brick 15 layer, the furnace top 16 is prevented from being too high in temperature to influence the safe operation of the sedimentation tank 10, and cold materials can be prevented from entering the inner cavity of the sedimentation tank 10 to cause the solution in the inner cavity to be sputtered to damage the furnace top 16; the sawtooth structure of the lower end surface of the first copper water jacket 14 can effectively increase the contact area between the first copper water jacket 14 and the refractory brick 15 layer, improve the cooling effect and ensure the stable connection between the first copper water jacket 14 and the refractory brick 15 layer; in the present embodiment, the first copper water jacket 14 is a conventional copper water jacket, and the structure and principle thereof are well known to those skilled in the art, so that the description thereof will not be repeated herein.

The vertical distance from the cold material port 11 to the upper end surface of the slag layer 13 is more than 600mm, so that the cold material entering the inner cavity of the sedimentation tank 10 is ensured to at least have kinetic energy capable of penetrating through the slag layer 13, and the cooling effect of the cold material on the blister copper layer 12 is ensured; in this embodiment, a feeding channel is disposed on the side of the cold material port 11 away from the opening of the sedimentation tank 10, and a valve is disposed at the end of the feeding channel to close the cold material port 11, so as to avoid heat outflow when cold material is not added into the sedimentation tank 10.

The cold material port 11 is arranged on the furnace top 16 of the sedimentation tank 10, the cold material port 11 is vertical to the furnace top, the cold material port is arranged in the center of the furnace top 16 between the reaction tower 20 and the rising flue 30, cold material can quickly enter the sedimentation tank 10 through the cold material port 11 in the center of the inner cavity of the sedimentation tank 10, and the cold material is just put into the center of the inner cavity of the sedimentation tank 10 corresponding to the rising flue 30 of the reaction tower 20, so that the cooling effect of the cold material on the inner cavity of the sedimentation tank 10 is effectively improved.

The side wall of the cold material port 11 is of a second copper water jacket 111 structure, and the second copper water jacket 111 can ensure that the cold material port 11 is not influenced by the stability of the inner cavity of the sedimentation tank 10.

The cross-section of sedimentation tank 10 inner chamber bottom is concave arc structure, and the depth at the middle part of the coarse copper layer 12 can be indirectly improved to the arc structure, further reduces the impact effect of cold charge to sedimentation tank 10 bottom, guarantees sedimentation tank 10 safe operation.

Example two

Referring to fig. 4, the present embodiment is different from the first embodiment in that: the cold material port 11 is arranged on the furnace top 16 of the sedimentation tank 10, the cold material port 11 and the furnace top 16 are obliquely arranged, the cold material port 11 is positioned at the rear side of the central axis of the furnace top 16 between the reaction tower 20 and the rising flue 30, the influence of the temperature of the inner cavity of the sedimentation tank 10 received by the cold material port 11 is small, but in order to ensure that the cold material port 11 can deliver the cold material to the middle position of the slag layer 13, the cold material port 11 needs to be obliquely arranged, so that the cold material in the cold material port 11 can slide to the middle part of the slag layer 13; in this embodiment, the inclination angle between the cold feed opening 11 and the furnace roof 16 is 50 ° or more.

Example III

Referring to fig. 5, the present embodiment is different from the first embodiment in that: the cold material port 11 is arranged at the upper end of a furnace wall 17 at the side end of the sedimentation tank 10, and the lower end of the cold material port 11 is obliquely downwards arranged; the cold material port 11 is minimally influenced by the temperature of the inner cavity of the sedimentation tank 10, and the lower end of the cold material port 11 is obliquely downwards arranged so that the cold material entering the inner cavity of the sedimentation tank 10 from the cold material port 11 can slide to the middle part of the slag layer 13; in this embodiment, the cold material needs to be pushed into the cold material port 11, so that the cold material can fall into the middle part of the slag layer 13, and the cooling effect of the cold material is ensured.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (8)

1. The utility model provides a flash converting furnace, its characterized in that, includes sedimentation tank, reaction tower and uptake, the reaction tower reaches the uptake is located sedimentation tank upper end and rather than the intercommunication, be equipped with on the furnace roof or the stove wall of sedimentation tank be used for throwing in the cold charge and with the cold charge mouth of sedimentation tank inner chamber intercommunication, the cold charge mouth is located the reaction tower with middle part between the uptake, the stove bottom of sedimentation tank inner chamber is equipped with blister copper layer and slag layer from bottom to top in proper order, blister copper layer's thickness is not less than 800mm, slag layer's thickness is not less than 300mm.

2. The flash converting furnace of claim 1, wherein the cold feed port is disposed on a roof of the sedimentation tank, the cold feed port is perpendicular to the roof, and the cold feed port is located at a center position of the roof between the reaction tower and the uptake shaft.

3. The flash converting furnace according to claim 1, wherein the cold material port is provided on the furnace roof of the sedimentation tank, the cold material port is provided obliquely to the furnace roof, and the cold material port is provided on the rear side of the central axis of the furnace roof between the reaction tower and the uptake shaft.

4. The flash converting furnace according to claim 1, wherein the cold material port is arranged at the upper end of the furnace wall at the side end of the sedimentation tank, and the lower end of the cold material port is arranged obliquely downwards.

5. The flash converting furnace according to claim 1, wherein the furnace roof of the sedimentation tank consists of a first copper water jacket and a refractory brick layer, the first copper water jacket is sleeved on the refractory brick layer, the lower end face of the first copper water jacket is in a saw-tooth shape, and the upper end face of the refractory brick layer is matched with the first copper water jacket.

6. The flash converting furnace of claim 1, wherein the vertical distance of the cold charge opening to the slag layer upper end surface is greater than 600mm.

7. The flash converting furnace of claim 1, wherein the side wall of the cold sprue is a second copper water jacket.

8. The flash converting furnace of claim 1, wherein the cross section of the bottom of the sedimentation tank cavity is in a concave arc structure.