Zinc smelting furnace for zinc pyrometallurgy

Abstract

The utility model relates to the technical field of smelting furnaces, in particular to a zinc smelting furnace for zinc pyrometallurgy. The interior of the furnace body can be directly heated, the heating uniformity of zinc mineral materials is improved, flame heat energy is fully utilized, energy loss is reduced, and more energy is saved. Comprising a mounting frame, a hollow shaft rotationally mounted on the mounting frame, a furnace body integrally connected with the hollow shaft and an internal combustion heating mechanism, and a driver for providing power for rotation of the hollow shaft is mounted on the mounting frame; the internal combustion heating mechanism comprises a hollow pipeline, a plurality of flame guns evenly distributed on the hollow pipeline and a plurality of heat transfer stirring rod pieces arranged on the flame guns in a covering mode, the hollow pipeline penetrates through the center of the hollow shaft, a mounting base fixedly connected with the hollow pipeline is mounted on the mounting frame, the flame spraying ends of the flame guns face the upper portion in the furnace body, and the flame spraying ends of the flame guns face the lower portion in the furnace body. And the bottom of the heat transfer stirring rod piece extends into the bottom in the furnace body.

Description

Technical Field

[0001] The utility model relates to the technical field of smelting furnaces, in particular to a zinc smelting furnace for pyrometallurgical zinc smelting. Background Art

[0002] As we all know, the pyrometallurgical zinc smelting process has undergone long-term development and practical verification, and the technical route is relatively mature and reliable, suitable for large-scale industrial production. Pyrometallurgical zinc smelting is suitable for various types of zinc ores, especially for zinc sulfide-rich ores, which can be directly processed without the need for a complex chemical leaching process in advance. In addition, pyrometallurgical zinc smelting can obtain a higher metallic zinc output rate, especially when processing high-grade zinc sulfide ores, the zinc recovery rate is high.

[0003] For example, a Chinese utility model patent discloses a small-scale pyrometallurgical copper refining furnace (publication (announcement) number: CN2266601Y). The outer shell of the furnace body is made of steel plates, and the top cover is connected to the furnace body by screws. The furnace is lined with shaped and unshaped refractory materials. There is a feeding and scraping port in the middle and lower part of one side of the furnace body, and a crude copper outlet in the lower part of the other side. There are wind tube ports in the middle of the left and right sides of the feeding and scraping port at the same height. There is a movable smoke hood above the feeding port that is connected to the chimney. The furnace body is suspended in the air by a bracket supported by a rotating shaft made of channel steel. When an external force is applied through the prying mouth, the furnace body can rotate within a certain arc. The furnace has a long service life, a short crude copper refining time, low energy and material consumption, and a high quality and output of crude copper.

[0004] However, when the inventor implemented this device, he found the following defects: the entire furnace structure is bulky, the outside of the furnace is heated by flame to heat and melt the material in the furnace, the preheating time of the material in the furnace is long, the heat energy loss during the flame combustion process is large, and the material is heated evenly. Utility Model Content

[0005] Technical issues

[0006] In view of the deficiencies in the prior art, the utility model provides a zinc smelting furnace which directly heats the interior of the furnace body, improves the heating uniformity of zinc ore materials, fully utilizes flame heat energy, reduces energy loss, and is more energy-efficient.

[0007] Technical Solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a zinc smelting furnace for pyrometallurgical zinc smelting, comprising a mounting frame, a hollow shaft rotatably mounted on the mounting frame, a furnace body integrally connected to the hollow shaft, and an internal combustion heating mechanism, wherein a driver is mounted on the mounting frame to provide power for the rotation of the hollow shaft, the internal combustion heating mechanism comprises a hollow pipe, a plurality of flamethrowers evenly distributed on the hollow pipe, and a plurality of heat transfer stirring rods covered on the flamethrowers, the hollow pipe passes through the center of the hollow shaft, a mounting seat fixedly connected to the hollow pipe is mounted on the mounting frame, the flame-spraying end of the flamethrower faces upward in the furnace body, and the bottom of the heat transfer stirring rod extends into the bottom of the furnace body; further, the driver is preferably an electric motor and a chain, and the output end of the electric motor is transmission-connected to the hollow shaft through a chain; the heat transfer stirring rod is composed of a plurality of strip-shaped closed ring frames; and the outer wall of the furnace body is covered with a heat insulating layer.

[0009] As a preferred solution, it also includes a base frame and two driving cylinders hingedly mounted on the mounting frame, the mounting frame is hingedly mounted on the base frame, the output end of the driving cylinder is hinged to the base frame, and the furnace body is provided with a discharge port; further, when the mounting frame is placed horizontally, the discharge port is arranged to be inclined upward.

[0010] As a preferred solution, a column frame is rotatably mounted on the base frame, and a blocking cover that fits with the discharge port is fixedly mounted on the column frame.

[0011] As a preferred solution, the blocking cover is provided with a feeding port and a flue that bends and extends upward, and an opening and closing door is hingedly installed at the feeding port.

[0012] As a preferred solution, it also includes a liquid oxygen tank and a liquid natural gas tank placed on the base frame, and the input end of the hollow pipe is connected to the outflow end of the liquid oxygen tank and the liquid natural gas tank.

[0013] As a preferred solution, two supporting wheels arranged side by side are rotatably mounted on the mounting frame, and the furnace body is placed between the two supporting wheels.

[0014] As a preferred solution, a sealing rubber ring is rotatably mounted on one end of the blocking cover adjacent to the furnace body.

[0015] Beneficial Effects

[0016] Compared with the prior art, the utility model provides a zinc smelting furnace for pyrometallurgical zinc smelting, which has the following beneficial effects: the zinc smelting furnace for pyrometallurgical zinc smelting, by placing zinc mineral material into the furnace body, a driver drives the furnace body to rotate, and the flame sprayed from the flame spray gun directly heats the furnace body wall and the heat transfer stirring rod, the heated heat transfer stirring rod stirs the zinc mineral material and transfers heat to the zinc mineral material, so that the zinc mineral material in the furnace body is evenly heated; the interior of the furnace body is directly heated, the heating uniformity of the zinc mineral material is improved, the flame heat energy is fully utilized, the energy loss is reduced, and it is more energy-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of the top plan structure of the utility model;

[0019] Figure 3 The utility model Figure 2 Schematic diagram of the cross-section structure at AA in the middle;

[0020] Figure 4 It is a three-dimensional structural schematic diagram of the connection relationship between the flamethrower and the heat transfer stirring rod of the utility model;

[0021] Markings in the attached drawings: 1. mounting frame; 2. hollow shaft; 3. furnace body; 4. driver; 5. hollow pipe; 6. flamethrower; 7. heat transfer stirring rod; 8. mounting base; 9. base frame; 10. driving cylinder; 11. discharge port; 12. column frame; 13. baffle cover; 14. flue; 15. opening and closing door; 16. liquid oxygen tank; 17. liquid natural gas tank; 18. support wheel; 19. sealing rubber ring. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0023] As described in the background technology, a small-scale pyrometallurgical copper refining furnace is described; the entire furnace body structure is bulky, and the outside of the furnace body is heated by flame to heat and melt the material in the furnace body. The preheating time of the material in the furnace body is long, the heat energy loss during the flame combustion process is large, and the material heating uniformity is poor.

[0024] In order to solve this technical problem, the utility model provides a zinc smelting furnace for pyrometallurgical zinc smelting, which is used for melting and refining zinc ore materials.

[0025] Specifically, please refer to Figure 1-4 The pyrometallurgical zinc smelting furnace specifically comprises: a mounting frame 1, a hollow shaft 2 rotatably mounted on the mounting frame 1, a furnace body 3 integrally connected with the hollow shaft 2, and an internal combustion heating mechanism, the mounting frame 1 is equipped with a driver 4 for providing power for the rotation of the hollow shaft 2, the internal combustion heating mechanism comprises a hollow pipe 5, a plurality of flamethrowers 6 evenly distributed on the hollow pipe 5, and a plurality of heat transfer stirring rods 7 covered on the flamethrowers 6, the hollow pipe 5 passes through the center of the hollow shaft 2, and the mounting frame 1 is equipped with a heat transfer rod 7 fixedly connected with the hollow pipe 5. The mounting seat 8, the flame-spraying end of the flame-spraying gun 6 faces the upper part of the furnace body 3, and the bottom of the heat transfer stirring rod 7 extends into the bottom of the furnace body 3; further, the driver 4 is preferably an electric motor and a chain, and the output end of the motor is transmission-connected to the hollow shaft 2 through the chain; the heat transfer stirring rod 7 is composed of a plurality of strip-shaped closed ring frames; the outer wall of the furnace body 3 is coated with a heat insulation layer; the heat insulation layer not only has the effect of heat insulation and heat preservation, but also can prevent the operator from contacting the outer wall of the furnace body 3 in a heated state, thereby reducing the incidence of accidents such as burns.

[0026] The utility model provides a zinc smelting furnace for pyrometallurgical zinc smelting. The zinc ore material is placed into a furnace body 3. A driver 4 drives the furnace body 3 to rotate. The flame sprayed from a flamethrower 6 directly heats the inner wall of the furnace body 3 and a heat transfer stirring rod 7. The heated heat transfer stirring rod 7 stirs the zinc ore material and transfers heat to the zinc ore material, so that the zinc ore material in the furnace body 3 is evenly heated. The interior of the furnace body 3 is directly heated to improve the heating uniformity of the zinc ore material, fully utilize the flame heat energy, reduce energy loss, and save energy.

[0027] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0028] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] Example 1

[0031] Please refer to Figure 1-4A zinc smelting furnace for pyrometallurgical zinc smelting comprises a mounting frame 1, a hollow shaft 2 rotatably mounted on the mounting frame 1, a furnace body 3 integrally connected to the hollow shaft 2, and an internal combustion heating mechanism, wherein a driver 4 for providing power for the rotation of the furnace body 3 is mounted on the mounting frame 1, the internal combustion heating mechanism comprises a hollow pipe 5, a plurality of flamethrowers 6 uniformly distributed on the hollow pipe 5, and a plurality of heat transfer stirring rods 7 covered on the flamethrowers 6, the hollow pipe 5 passes through the center of the hollow shaft 2, a mounting seat 8 fixedly connected to the hollow pipe 5 is mounted on the mounting frame 1, a flamethrower end of the flamethrower 6 faces upward in the furnace body 3, and the bottom of the heat transfer stirring rod extends into the bottom of the furnace body 3; it also comprises a base frame 9 and two drive cylinders 10 hingedly mounted on the mounting frame 1, the mounting frame 1 is hingedly mounted on the base frame 9, the output end of the drive cylinder 10 is hingedly connected to the base frame 9, and a discharge port 11 is arranged on the furnace body 3; further, when the mounting frame 1 is placed horizontally, the discharge port 11 is arranged tilted upward.

[0032] In the zinc smelting furnace for pyrometallurgical zinc smelting provided in this embodiment, after the material in the furnace body 3 is smelted to a molten state, the two driving cylinders 10 are started to rotate the mounting frame 1 around the hinge of the base frame 9 until the discharge port 11 tilts downward, and the molten material in the furnace body 3 is automatically discharged through the discharge port 11, thereby improving the convenience of discharging the material in the furnace body 3.

[0033] Example 2

[0034] The zinc smelting furnace for pyrometallurgical zinc smelting provided in Example 1 is further optimized. Specifically, Figure 1 As shown, a column frame 12 is rotatably mounted on the base frame 9, and a baffle 13 that fits with the discharge port 11 is fixedly mounted on the column frame 12; a feeding port and a flue 14 that bends and extends upward are provided on the baffle 13, and an opening and closing door 15 is hingedly mounted at the feeding port; the flue 14 can be connected to an external exhaust gas treatment device through a flexible plastic tube.

[0035] In the pyrometallurgical zinc smelting furnace provided in this embodiment, during the process of melting and refining zinc ore materials, the blocking cover 13 blocks the discharge port 11 of the furnace body 3 to reduce the heat loss in the furnace body 3, and various reagents can be added into the furnace body 3 through the feeding port, and the exhaust gas generated by the combustion of gas in the furnace body 3 and the refining of zinc ore materials is discharged through the flue 14.

[0036] Specifically, it also includes a liquid oxygen tank 16 and a liquid natural gas tank 17 placed on the base frame 9, and the input end of the hollow pipe 5 is connected to the outflow end of the liquid oxygen tank 16 and the liquid natural gas tank 17; the liquid oxygen in the liquid oxygen tank 16 and the liquid natural gas in the liquid natural gas tank 17 enter the hollow pipe 5 and are gasified, and the gasified fuel at the flamethrower 6 is ignited, so that a jet-like flame is generated at the flamethrower 6, thereby comprehensively heating the air in the furnace body 3, the inner wall of the furnace body 3 and the heat transfer stirring rod 7.

[0037] Specifically, two supporting wheels 18 arranged side by side are rotatably mounted on the mounting frame 1 , and the furnace body 3 is placed between the two supporting wheels 18 ; the supporting wheels 18 can effectively support the furnace body 3 in a rotating state, thereby improving the rotation stability of the furnace body 3 .

[0038] Specifically, a sealing rubber ring 19 is rotatably installed at one end of the baffle cover 13 adjacent to the furnace body 3; the sealing rubber ring 19 can improve the connection tightness between the baffle cover 13 and the discharge port 11 of the furnace body 3, reduce heat loss from the discharge port 11, and the sealing rubber ring 19 can realize the rotational contact between the baffle cover 13 and the furnace body 3, avoiding the baffle cover 13 from interfering with the rotation of the furnace body 3.

[0039] The use process of the zinc smelting furnace for pyrometallurgical zinc smelting provided by the utility model is as follows: in the initial state, the mounting frame 1 is in a horizontal state and placed on the bottom frame 9, the zinc mineral material is placed into the furnace body 3 through the discharge port 11, the baffle 13 is closed, the valves on the liquid oxygen tank 16 and the liquid natural gas tank 17 are opened, the fuel sprayed from the flamethrower 6 is ignited, the driver 4 drives the furnace body 3 to rotate, and the flame sprayed from the flamethrower 6 directly heats the inner wall of the furnace body 3 and the heat transfer stirring rod 7, and the heated heat transfer stirring rod 7 stirs the zinc mineral material, so that the zinc mineral material in the furnace body 3 is evenly heated; the reagent can be added into the furnace body 3 through the feeding port, and when the zinc mineral material in the furnace body 3 is in a molten state, the baffle 13 is opened, the drive cylinder 10 is started, the mounting frame 1 is rotated, and the molten material in the furnace body 3 is discharged through the discharge port 11, and the molten zinc can be collected.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Obviously, the embodiments described above are only some embodiments of the utility model, rather than all embodiments. The preferred embodiments of the utility model are given in the accompanying drawings, but they do not limit the patent scope of the utility model. The utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. Although the utility model is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the utility model specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the utility model.

Claims

1. A zinc smelting furnace for pyrometallurgical zinc smelting, characterized in that: The invention comprises a mounting frame (1), a hollow shaft (2) rotatably mounted on the mounting frame (1), a furnace body (3) integrally connected to the hollow shaft (2), and an internal combustion heating mechanism. The mounting frame (1) is provided with a driver (4) for providing power for the rotation of the hollow shaft (2). The internal combustion heating mechanism comprises a hollow pipe (5), a plurality of flamethrowers (6) evenly distributed on the hollow pipe (5), and a plurality of heat transfer stirring rods (7) covered on the flamethrowers (6). The hollow pipe (5) passes through the center of the hollow shaft (2). The mounting frame (1) is provided with a mounting seat (8) fixedly connected to the hollow pipe (5). The flamethrower end of the flamethrower (6) faces upward inside the furnace body (3), and the bottom of the heat transfer stirring rod (7) extends into the bottom of the furnace body (3).

2. The zinc smelting furnace for pyrometallurgical zinc smelting according to claim 1, characterized in that: It also comprises a base frame (9) and two drive cylinders (10) hingedly mounted on the mounting frame (1), the mounting frame (1) being hingedly mounted on the base frame (9), the output end of the drive cylinder (10) being hingedly connected to the base frame (9), and a discharge port (11) being provided on the furnace body (3).

3. The zinc smelting furnace for pyrometallurgical zinc smelting according to claim 2, characterized in that: A column frame (12) is rotatably mounted on the base frame (9), and a blocking cover (13) that fits with the discharge port (11) is fixedly mounted on the column frame (12).

4. The zinc smelting furnace for pyrometallurgical zinc smelting according to claim 3, characterized in that: The blocking cover (13) is provided with a feeding port and a flue (14) that bends and extends upwards, and an opening and closing door (15) is hingedly installed at the feeding port.

5. The zinc smelting furnace for pyrometallurgical zinc smelting according to claim 1 or 4, characterized in that: It also includes a liquid oxygen tank (16) and a liquid natural gas tank (17) placed on the base frame (9), and the input end of the hollow pipe (5) is connected to the outflow ends of the liquid oxygen tank (16) and the liquid natural gas tank (17).

6. The zinc smelting furnace for pyrometallurgical zinc smelting according to claim 1, characterized in that: Two supporting wheels (18) arranged side by side are rotatably mounted on the mounting frame (1), and the furnace body (3) is placed between the two supporting wheels (18).

7. The zinc smelting furnace for pyrometallurgical zinc smelting according to claim 3, characterized in that: A sealing rubber ring (19) is rotatably mounted on one end of the blocking cover (13) adjacent to the furnace body (3).

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