CN202786369U - Zinc-leached residue treating device - Google Patents

Abstract

The utility model discloses a zinc leaching slag treatment device, comprising: a section of side blowing furnace, the section of side blowing furnace is used for smelting zinc leaching slag, and the section of side blowing furnace has a first furnace body and a The first side-blowing lance that injects oxygen-containing gas and fuel into the first furnace body; the second-stage side-blowing furnace, which is used to smelt the molten slag produced by the first-stage side-blowing furnace and the second-stage side-blowing furnace The side-blown furnace has a second furnace body connected to the first furnace body through a hot slag chute and a second side-blown lance for injecting oxygen-containing gas and fuel into the second furnace body. The above-mentioned zinc leaching slag treatment device of the utility model has low energy consumption and production cost, high recovery rate of zinc, lead, silver and scattered metals, and can improve the operating environment.

Description

Zinc leaching slag treatment device

technical field

The utility model relates to a treatment device for nonferrous metal smelting, especially zinc leaching slag.

Background technique

At present, the commonly used zinc leaching slag treatment process is the rotary kiln volatilization method. However, the rotary kiln volatilization method has obvious disadvantages, such as low equipment capacity, short furnace lining life, high comprehensive energy consumption, expensive coke, large equipment footprint, poor operating environment, and other valuable zinc leaching slag. Metals such as silver, indium, germanium and other valuable metals have a low recovery rate.

Utility model content

The utility model aims to solve the above-mentioned technical problems at least to a certain extent or at least provide a useful commercial choice.

For this reason, the first purpose of this utility model is to propose a zinc leaching slag treatment device, which can carry out harmless treatment of zinc leaching slag, improve the comprehensive utilization level of resources, improve the operating environment, and reduce energy consumption. Consumption and cost.

The zinc leaching slag treatment device according to the present invention comprises: a section of side-blowing furnace, said section of side-blowing furnace includes: a first furnace body, said first furnace body defines a first molten pool and includes a first upper furnace body , the first middle furnace body, the first lower furnace body and the first furnace hearth, the first furnace body has zinc leaching slag and flux feeding port, the first smoke exhaust port, the first slag discharge port, the first air supply port and A first spray gun socket formed on the side wall of the first furnace body; and a first side blowing spray gun, the first side blowing spray gun is inserted in the first spray gun socket for injecting into the first furnace Oxygen-containing gas and fuel are sprayed into the first melting pool of the body; and a two-stage side-blowing furnace, the two-stage side-blowing furnace includes: a second furnace body, the second furnace body includes a second upper furnace body, a second The middle furnace body and the second lower furnace body define a second molten pool, and the second furnace body has a hot slag feed port connected to the first slag discharge port through a hot slag chute, and a second smoke discharge port , the second slag discharge port, the second supplementary air port and the second spray gun socket formed on the side wall of the second furnace body; and the second side blowing lance, the second side blowing lance is inserted in the second The spray gun socket is used for spraying oxygen-containing gas and reducing agent into the second melting pool of the second furnace body.

The zinc leaching slag treatment device according to the embodiment of the utility model has at least the following beneficial effects:

1) The zinc leaching slag treatment device of the embodiment of the utility model can process zinc leaching slag and fully recover valuable metals such as zinc in the zinc leaching slag, so it can not only save precious metal resources, but also prevent the occurrence of zinc and other valuable metals The zinc leaching slag pollutes the environment;

2) The zinc leaching slag treatment device of the embodiment of the utility model has a first-stage side-blowing furnace and a second-stage side-blowing furnace connected to each other. The molten slag discharged from the first-stage side-blowing furnace can automatically enter the second-stage side-blowing furnace through the hot slag chute. Therefore, the above-mentioned zinc leaching slag treatment device has a higher degree of automation, equipment level and energy-saving effect compared with the existing rotary furnace, and zinc, etc. have Increased recovery of valence metals;

3) The zinc leaching slag processing device of the embodiment of the utility model can effectively treat zinc leaching slag using cheap reducing agents such as coal powder, so compared with the existing rotary kiln using metallurgical coke, the above zinc leaching slag processing device can be larger Significantly reduce production costs;

4) The zinc leaching slag treatment device of the embodiment of the utility model has strong continuity and good sealing performance, so the operation rate is high and the leakage of smoke can be prevented, and the pollution to the working space of the workers can be greatly reduced during the operation process, which is significantly Improve the production environment.

In addition, the zinc leaching slag treatment device according to the above-mentioned embodiments of the present invention can also have the following additional technical features:

Preferably, the zinc leaching slag processing device further includes: a first waste heat boiler connected to the first smoke outlet; a first dust collector connected to the first dust collector The first waste heat boiler is connected to collect smoke and dust in the flue gas discharged from the first smoke exhaust port; the second waste heat boiler is connected to the second smoke exhaust port and a second dust collector, the second dust collector is connected to the second waste heat boiler, and is used to collect smoke and dust in the flue gas discharged from the second smoke outlet.

Preferably, each of the first and second waste heat boilers includes: a flue in the transition section, the flue in the transition section includes an ascending portion and a descending portion, the upper end of the ascending portion is connected to the upper end of the descending portion, the The lower end of the ascending part is connected with the smoke outlet; and the convection section flue, the smoke inlet of the convection section flue is connected with the lower end of the descending part of the transition section flue, and the smoke outlet of the convection section flue A smoke outlet is formed at the end, and a convection tube bundle is arranged in the flue of the convection section.

Preferably, the first hearth has a first discharge port.

Preferably, the second furnace body further includes a second hearth, and the second hearth has a second discharge port.

Preferably, the second furnace body also has a flux cold material feeding port.

Preferably, the first smoke outlet is arranged on the top of the first upper furnace body, and the second smoke outlet is arranged on the top of the second upper furnace body.

Preferably, the furnace walls of the first upper furnace body and the second upper furnace body are membrane wall structures, the first middle furnace body and the second middle furnace body are water jacket structures, and the first middle furnace body is a water jacket structure. The lower furnace body is composed of refractory lining and water jacket.

Preferably, the second lower furnace body is configured as a structure lined with refractory material and provided with a water jacket or adopts a full water jacket structure.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present utility model will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is a schematic diagram of a zinc leaching slag treatment device according to an embodiment of the present invention.

Fig. 2A is a front view of a side-blowing furnace of a zinc leaching slag treatment device according to an embodiment of the present invention.

Fig. 2B is a side view of a side-blown furnace of a zinc leaching slag treatment device according to an embodiment of the present invention.

Fig. 3A is a front view of the second-stage side-blowing furnace of the zinc leaching slag treatment device according to the embodiment of the present utility model.

Fig. 3B is a side view of the two side blowing furnaces of the zinc leaching slag treatment device according to the embodiment of the present utility model.

Fig. 4 is a structural schematic diagram of the first waste heat boiler and the second waste heat boiler of the zinc leaching slag treatment device according to the embodiment of the present utility model.

Fig. 5 is a schematic diagram of the operation flow of the zinc leaching slag treatment device according to the embodiment of the present invention.

Mark Description:

1. One-stage side-blowing furnace; 2. Second-stage side-blowing furnace; 3. Hot slag chute; 4. First waste heat boiler, second waste heat boiler; 11. First upper furnace body; 12. First middle furnace body; 13. First lower furnace 14 the first hearth; 15 the first side blowing lance; 21 the second upper furnace body; 22 the second middle furnace body; 23 the second lower furnace body; 24 the second hearth; 25 the second side blowing lance; 41 Transition section flue; 42 convection section flue; 111 zinc leaching slag and flux feeding port; 112 first smoke exhaust port; 131 first spray gun socket; 132 first slag discharge port; 133 first discharge port; 134 first filling Tuyere; 211 flux cold material feeding port; 212 second smoke exhaust port; 221 hot slag feeding port; 231 second spray gun socket; 232 second slag discharge port; 233 second discharge port; Department; 412 descending part; 421 smoke outlet; 422 convection tube bundle.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

In describing the present invention, it should be understood that the terms "center", "transverse", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", Orientation indicated by "back", "left", "right", "horizontal", "vertical", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. Or the positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be configured in a specific orientation, and operation, and therefore cannot be construed as a limitation of the utility model.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.

In this utility model, unless otherwise specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

In the present invention, unless otherwise clearly specified and limited, a first feature being "on" or "below" a second feature may include direct contact between the first and second features, and may also include the first and second features being in direct contact with each other. The features are not in direct contact but through another feature between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "below" and "under" the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is less horizontal than the second feature.

Fig. 1 is a schematic diagram of a zinc leaching slag treatment device according to an embodiment of the utility model, Fig. 2A is a front view of a section of side-blown furnace of a zinc leaching slag treatment device according to an embodiment of the utility model, and Fig. 2B is an implementation according to the utility model The side view of the side-blowing furnace of the zinc leaching slag treatment device of the example, Fig. 3A is the front view of the two-stage side-blowing furnace of the zinc leaching slag treatment device according to the embodiment of the utility model, and Fig. 3B is the front view of the second-stage side-blowing furnace according to the embodiment of the utility model Fig. 4 is a schematic structural view of the first waste heat boiler of the zinc leaching slag treatment device according to an embodiment of the present invention.

As shown in FIG. 1 to FIG. 3B , the zinc leaching slag treatment device according to the embodiment of the present invention includes a first-stage side-blowing furnace 1 , a second-stage side-blowing furnace 2 and a hot slag chute 3 .

Specifically, a side-blowing furnace 1 includes: a first furnace body, which defines a first molten pool and includes a first upper furnace body 11, a first middle furnace body 12, a first lower furnace body 13 and a first furnace body. The first furnace hearth 14, the first furnace body has zinc leaching slag and flux feeding port 111, the first smoke exhaust port 112, the first slag discharge port 132, the first air supply port 134 and the side wall formed on the first furnace body The first spray gun socket 131; and the first side blowing spray gun 15, the first side blowing spray gun 15 is inserted in the first spray gun socket 131, for injecting oxygen-containing gas and fuel into the first molten pool of the first body of furnace .

The two-stage side-blowing furnace 2 comprises: a second furnace body, which includes a second upper furnace body 21, a second middle furnace body 22 and a second lower furnace body 23 and defines a second melting pool, and the second The furnace body has a hot slag feed port 221 connected to the first slag discharge port 132 through the hot slag chute 3, a second smoke discharge port 212, a second slag discharge port 232, a second supplementary air port 234 and a The second spray gun socket 231 on the side wall and the second side blowing spray gun 25, the second side blowing spray gun 25 is inserted in the second spray gun socket 231, for spraying into the second molten pool of the second furnace body containing oxygen bodies and reducing agents.

The zinc leaching slag treatment device of the embodiment of the utility model can process zinc leaching slag and fully recover valuable metals such as zinc in the zinc leaching slag, so that it can not only save precious metal resources, but also prevent zinc leaching containing valuable metals such as zinc The leaching slag pollutes the environment; the zinc leaching slag treatment device in the embodiment of the utility model has a first-stage side-blowing furnace and a second-stage side-blowing furnace connected to each other, and the molten slag discharged from the first-stage side-blowing furnace can automatically enter through the hot slag chute to the second-stage side-blowing furnace, so that the melting and depletion process can be carried out continuously, so the above-mentioned zinc leaching slag treatment device has a higher degree of automation and equipment compared with the existing rotary furnace, and the recovery of valuable metals such as zinc The efficiency is improved; the zinc leaching slag processing device of the embodiment of the utility model can effectively process the zinc leaching slag using cheap reducing agents such as coal powder, so compared with the existing rotary kiln using metallurgical coke, the above-mentioned zinc leaching slag processing device can Substantial reduction in production costs; the zinc leaching slag treatment device in the embodiment of the utility model has strong continuity and good sealing performance, so the operation rate is high and smoke leakage can be prevented, and the work space for workers can be greatly reduced during operation Cause pollution and significantly improve the production environment.

For ease of understanding, the components of the zinc leaching slag treatment device in the embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 2A and Fig. 2B show a section of side-blown furnace 1 in the zinc leaching slag treatment device of the embodiment of the present invention. As shown in FIG. 2A and FIG. 2B , the side-blowing furnace 1 of the zinc leaching slag treatment device of the embodiment of the present invention includes a first furnace body and a side-blowing lance 12 inserted into the first furnace body.

The first furnace body defines a first melting pool, and the first furnace body may include a first upper furnace body 11 , a first middle furnace body 12 , a first lower furnace body 13 and a first hearth 14 .

The first upper furnace body 11 is a cavity structure with an open bottom, and its outer wall can be formed in various structures, as long as it can surround an inner cavity. In the embodiment of the present utility model, the furnace wall of the first upper furnace body 11 is preferably a membrane wall structure. In this way, on the one hand, the furnace structure of the first upper furnace body 11 can be simplified through the membrane wall, and the weight of the first upper furnace body 11 can be reduced. On the other hand, it is also possible to make the first upper furnace body 11 have good airtightness by using a membrane wall structure. At the same time, the furnace wall of the membrane wall structure can also prevent excessive adhesion of smoke and dust. In addition, the furnace body with membrane wall structure has high thermal conductivity, which can effectively dissipate heat and improve heat utilization rate.

As shown in FIG. 2A , zinc leaching slag and flux feeding port 111 , smoke exhaust port 112 and first tertiary tuyeres (not shown) are formed on the outer wall of the first upper furnace body 11 .

Among them, the zinc leaching slag and flux feeding port 111 is used to add materials such as zinc leaching slag and flux to the inside of the first furnace body, which can be formed at any position on the outer wall of the first upper furnace body 11, such as on the side wall or on the top. . In one embodiment of the present utility model, the above-mentioned zinc leaching slag and flux feeding port 111 is arranged on the side wall of the first upper furnace body 11, so as to facilitate connection with other upstream equipment. Moreover, the zinc leaching slag and flux feeding port 111 provided on the side wall can also provide convenience for operation, thereby improving feeding efficiency.

The first smoke outlet 112 communicates the inner chamber of the first furnace body with other equipment or the outside atmosphere, and is a passage for the smoke inside the first furnace body to leave the first furnace body. The first smoke outlet 112 can be arranged at any position on the first upper furnace body 11 , such as on the side wall or the top, as long as the smoke can be discharged. In one embodiment of the present invention, considering the upward movement of high-temperature flue gas, the first smoke outlet 112 is arranged on the top of the first upper furnace body 11 . In this way, it is beneficial for the high-temperature flue gas generated in the first furnace body to be discharged from the first smoke exhaust port 112 at the top without staying in the first furnace body.

In addition, as shown in Figure 2A, in a preferred embodiment of the present utility model, the first upper furnace body 11 is provided with an inclined portion, and the side wall of the first upper furnace body 11 is inclined from bottom to top toward the outside of the inclined portion , so that the plane shape of the first upper furnace body 11 observed from the direction shown in FIG. 2A is a trapezoid whose upper bottom is longer than the lower bottom, and the first smoke exhaust port 112 is arranged on the top of the inclined portion of the first upper furnace body 11 face. In this way, more components can be arranged on the top of the first upper furnace body 11 to make full use of the head space, and it is also possible to avoid increasing the size of the first middle furnace body 12 and the first lower furnace body 13, thereby facilitating the realization of equipment miniaturization.

The first tertiary tuyere is an opening provided on the first furnace body to allow gas to enter. By setting the first tertiary tuyere, workers can blow air and other combustion-supporting materials into a section of side blowing furnace 1 from the first tertiary tuyere. agent to burn and oxidize the CO and volatile metal vapor in the flue gas to prevent pollution to the environment.

The first tertiary tuyeres can be set at any position on a section of side blowing furnace 1, such as the side or top of the first upper furnace body 11, the side of the first middle furnace body 12 or the side of the first lower furnace body 13 , as long as the above effects can be achieved. In a preferred embodiment of the present utility model, the first tertiary tuyere is an opening arranged on the side of the first upper furnace body 11, so that the CO And volatile metal vapor combustion oxidation, that is to achieve the purpose of preventing pollution to the environment, and solve the energy.

The first middle furnace body 12 is a cavity structure open up and down, and the cavity structure may be a straight cylinder or a curved cylinder. In the embodiment of the present utility model, in order to make the high-temperature flue gas in the furnace cavity enter the first upper furnace body 11 as much as possible, it is preferable to form the first middle furnace body 12 into a straight cylinder extending in the vertical direction.

The outer wall of the first middle furnace body 12 can be formed in various structures, as long as it can surround the inner cavity. In the embodiment of the present utility model, it is preferable to adopt the first middle furnace body 12 with a water jacket structure, so that the temperature of the first middle furnace body 12 can be lowered through the water jacket structure.

The first lower furnace body 13 is a cavity structure with a closed bottom and an open top. Moreover, the first lower furnace body 13 can also be configured as a straight cylinder or a curved cylinder. In the embodiment of the present utility model, in order to discharge as much high-temperature flue gas in the first furnace body as possible, the first lower furnace body 13 is preferably formed as a straight cylinder extending in the vertical direction.

The outer wall of the first lower furnace body 13 can be formed in various structures, as long as it can surround the inner cavity. For example, in an embodiment of the present utility model, the first lower furnace body 13 is configured as a structure lined with refractory material and provided with a water jacket, so as to lower the temperature of the first lower furnace body 13 .

As shown in FIG. 2A and FIG. 2B , a first spray gun socket 131 and a first slag discharge port 132 are formed on the first lower furnace body 13 .

The first spray gun socket 131 may be a through hole arranged on the side wall of the first lower furnace body 13, for inserting the first side-blown lance 15, so that the first side-blown lance 15 can spray into the first molten pool containing Oxygen gas, fuel and other materials. The first spray gun sockets 131 can be set to any number as required. In this embodiment, the first spray gun sockets 131 are arranged on the side wall of the first lower furnace body 13, and these first spray gun sockets 131 are arranged at intervals, thus , materials such as oxygen-containing gas and fuel can be evenly sprayed into the first molten pool through the first spray gun sockets 131 arranged at intervals in the transverse direction. In addition, in another preferred embodiment of the present utility model, as shown in FIG. 2B , a plurality of first spray gun sockets 131 are provided on the opposite left side wall and right side wall of the first lower furnace body 13, In order to inject materials such as oxygen gas and fuel into the first molten pool more uniformly.

The first slag discharge port 132 can be arranged on the side wall of the first lower furnace body 13 for connecting with the hot slag chute 3, so that the molten slag in the first molten pool can be connected with the hot slag via the first slag discharge port 132 The chute 3 and the hot slag feed port 221 described later enter into the second molten pool of the second-stage side-blowing furnace 2 .

As shown in FIG. 2B , the bottom of the first hearth 14 may also be provided with a first discharge port 133 . In this way, crude lead and/or matte can be discharged from the first hearth 14 during the smelting process of zinc leaching slag, which not only recycles lead and/or matte, but also prevents the pollution of lead and/or matte to the environment .

As shown in FIG. 2B , one end of the first side blowing lance 15 is inserted into the first lance socket 131 , and the other end is connected to a material supply source for injecting materials such as oxygen-containing gas and fuel into the first molten pool. In addition, the first furnace body can also be provided with a first supplementary air port 134 communicating with the interior, so that the secondary air can be blown into the first molten pool through the first supplementary air port 134 to increase the blowing effect.

Fig. 3A and Fig. 3B show the two-stage side-blowing furnace 2 in the zinc leaching slag treatment device of the embodiment of the present invention. As shown in FIG. 3A and FIG. 3B , the two-stage side-blowing furnace 2 of the zinc leaching slag treatment device of the embodiment of the present invention includes a second furnace body and a side-blowing lance 22 inserted into the second furnace body.

In the embodiment of the present utility model, the second furnace body defines the second melting pool, and the second furnace body may include a second upper furnace body 21 , a second middle furnace body 22 and a second lower furnace body 23 .

The second upper furnace body 21 is a cavity structure with an open bottom, and its outer wall can be formed in various structures, as long as it can surround an inner cavity. In the embodiment of the present utility model, the furnace wall of the second upper furnace body 21 is preferably a membrane wall structure. In this way, on the one hand, the furnace structure of the second upper furnace body 21 can be simplified through the membrane wall, and the weight of the second upper furnace body 21 can be reduced. On the other hand, it is also possible to make the second upper furnace body 21 have good airtightness by using a membrane wall structure. At the same time, the furnace wall structure of the membrane wall structure can also prevent excessive adhesion of smoke and dust. In addition, the furnace body with membrane wall structure has high thermal conductivity, which can effectively dissipate heat and improve heat utilization rate.

As shown in FIG. 3A , a smoke outlet 112 and a second tertiary tuyere (not shown) are formed on the outer wall of the second upper furnace body 21 .

Wherein, the second smoke outlet 212 communicates the inner cavity of the second furnace body with other equipment or the outside atmosphere, and is a passage for the smoke inside the second furnace body to leave the second furnace body. The second smoke exhaust port 212 can be arranged at any position on the second upper furnace body 21 , such as on the side wall or the top, as long as the smoke can be exhausted. In one embodiment of the present utility model, considering the upward movement of high-temperature flue gas, the second smoke outlet 212 is arranged on the top of the second upper furnace body 21 . In this way, the high-temperature flue gas generated in the second furnace body will be discharged from the second smoke exhaust port 212 at the top without staying in the second furnace body.

In addition, as shown in FIG. 3A, in a preferred embodiment of the present utility model, the second upper furnace body 21 is provided with an inclined portion, and the side wall of the second upper furnace body 21 is inclined toward the outside from bottom to top. , so that the planar shape of the second upper furnace body 21 observed from the direction shown in FIG. 3A is a trapezoid whose upper bottom is longer than the lower bottom, and the second smoke outlet 212 is arranged on the top of the inclined portion of the second upper furnace body 21 face. In this way, more components can be arranged on the top of the second upper furnace body 21 to make full use of the head space, and it is also possible to avoid increasing the size of the second middle furnace body 22 and the second lower furnace body 23, thereby facilitating the realization of equipment miniaturization.

The second and third tuyeres are openings provided on the second furnace body to allow gas to enter. By setting the second and third tuyeres, workers can blow air into the second-stage side-blowing furnace 2 from the second and third tuyeres. Combustion enhancer, which burns and oxidizes CO and volatilized metal vapor in the flue gas to prevent pollution to the environment.

The second tertiary tuyere can be set at any position on the second section side blowing furnace 2, such as the side or top of the second upper furnace body 21, the side of the second middle furnace body 22 or the side of the second lower furnace body 23 part, as long as the above-mentioned effects can be achieved. In a preferred embodiment of the present utility model, the second and third tuyeres are openings arranged on the side of the second upper furnace body 21, thereby using the heat of the high-temperature flue gas itself in the second furnace body to dissipate the CO in the flue gas And volatile metal vapor combustion oxidation, that is to achieve the purpose of preventing pollution to the environment, and solve the energy.

In addition, the second upper furnace body 21 may also be provided with a flux cold material feeding port 221 to allow workers to fill materials into the second-stage side-blowing furnace 2 through the flux cold material feeding port 221 . The molten cold material feeding port 221 can be arranged at any position on the second upper furnace body 21 , such as the top wall or the side wall, as long as its function can be realized. Certainly, the setting position of the molten material cold material feeding port 221 is not limited to the second upper furnace body 21, and the molten material cold material feeding port 221 can also be arranged on the side wall of the second middle furnace body 22 or the second furnace body 21 if necessary. On the side wall of lower furnace body 23.

The second middle furnace body 22 is a cavity structure open up and down, and the cavity structure may be a straight cylinder or a curved cylinder. In the embodiment of the present utility model, in order to make the high-temperature flue gas in the furnace cavity enter the second upper furnace body 21 as much as possible, the second middle furnace body 22 is preferably formed as a straight tube extending in the vertical direction.

The outer wall of the second middle furnace body 22 can be formed in various structures, as long as it can surround an inner cavity. In the embodiment of the present utility model, it is preferable to adopt the second middle furnace body 22 with a water jacket structure, so that the temperature of the second middle furnace body 22 can be lowered through the water jacket structure.

As shown in Figure 3A, a hot slag feed port 221 is formed on the second middle furnace body 22, and the hot slag feed port 221 is connected to the zinc leached slag and flux feed port 111 of the first-stage side-blowing furnace 1 through the hot slag chute 3 , thereby allowing the molten slag in the first-stage side-blowing furnace 1 to enter the second-stage side-blowing furnace 2 through the hot slag chute 3 . The second lower furnace body 23 is a cavity structure with a closed bottom and an open top. Moreover, the second lower furnace body 23 can also be configured as a straight cylinder or a curved cylinder. In the embodiment of the present invention, in order to discharge as much high-temperature flue gas in the second furnace body as possible, the second lower furnace body 23 is preferably formed as a straight tube extending in the vertical direction.

The outer wall of the second lower furnace body 23 can be formed into various structures. For example, the second lower furnace body 23 can be formed as a structure in which a refractory material is lined with a water jacket or a full water jacket structure is adopted, so that the second lower furnace body 23 Cool down.

As shown in FIG. 3A and FIG. 3B , a second spray gun socket 231 and a second slag discharge port 232 are formed on the second lower furnace body 23 .

The second spray gun socket 231 can be the through hole that is arranged on the side wall of the second lower furnace body 23, for inserting the second side blowing spray gun 25, so that the second side blowing spray gun 25 can spray into the second melting pool containing Materials such as oxygen gas and reducing agent. The second spray gun sockets 231 can be set to any number as required. In this embodiment, the second spray gun sockets 231 are arranged on the side wall of the second lower furnace body 23, and these second spray gun sockets 231 are arranged at intervals, thus , materials such as oxygen-containing gas and reducing agent can be evenly sprayed into the second molten pool through the second spray gun sockets 231 arranged at intervals in the transverse direction. In addition, in another preferred embodiment of the present utility model, as shown in FIG. 3B , a plurality of second spray gun sockets 231 are provided on the opposite left and right side walls of the second lower furnace body 23 , In order to inject materials such as oxygen gas and reducing agent into the second molten pool more uniformly.

The second slag discharge port 232 may be arranged on the side wall of the second lower furnace body 23 for discharging the spoil generated in the second-stage side-blown furnace 2 .

In addition, as shown in FIG. 3B , the bottom of the second hearth 24 may also be provided with a second discharge port 233 . In this way, crude lead and/or matte can be discharged from the second hearth 24 during the smelting process of zinc leaching slag, which not only recycles lead and/or matte, but also prevents the pollution of lead and/or matte to the environment .

As shown in FIG. 3B , one end of the second side blowing lance 25 is inserted into the second lance socket 231 , and the other end is connected to a material supply source for injecting materials such as oxygen-containing gas and reducing agent into the second molten pool. Moreover, the second furnace body can also be provided with a second supplementary air port 234 communicating with the interior, so that the secondary air can be blown into the second melting pool through the second supplementary air port 234 to increase the blowing effect.

In addition, in an embodiment of the present invention, the zinc leaching slag treatment device may further include a first waste heat boiler, a first dust collector, a second waste heat boiler and a second dust collector. Wherein, the first waste heat boiler is connected with the first exhaust port 112, and is used to receive the high-temperature flue gas from the first-stage side-blown furnace 1 and recover the heat in the high-temperature flue gas. The first dust collector is connected with the first waste heat boiler, and is used for collecting zinc-containing smoke in the smoke discharged from the first smoke outlet 112 . The second waste heat boiler is connected to the second exhaust port 212, and is used to receive the high-temperature flue gas from the second-stage side-blowing furnace 2 and recover the heat in the high-temperature flue gas. The second dust collector is connected with the second waste heat boiler, and is used for collecting zinc-containing smoke in the flue gas discharged from the second smoke outlet 212 .

In this way, on the one hand, the heat in the high-temperature flue gas discharged from the first-stage side-blowing furnace 1 and the second-stage side-blowing furnace 2 can be fully recovered through the first waste heat boiler and the second waste heat boiler, and the recovered heat can be reused ( Such as power generation, heating) to reduce comprehensive energy consumption; on the other hand, it is also possible to recover the smoke and dust in the high-temperature flue gas discharged from the first-stage side-blowing furnace 1 and the second-stage side-blowing furnace 2 through the first dust collector and the second dust collector, to avoid polluting the environment.

Fig. 4 shows the structures of the first waste heat boiler and the second waste heat boiler. Since the first waste heat boiler and the second waste heat boiler have the same structure, in the following description, the first waste heat boiler and the second waste heat boiler will be marked with the same symbol "4".

As shown in FIG. 4 , each of the first waste heat boiler and the second waste heat boiler may include a transition section flue 41 and a convection section flue 42 .

Wherein, the transitional flue 41 has an ascending portion 411 and a descending portion 412 whose upper end (i.e., the upper end in FIG. connected.

The smoke inlet of the convection section flue 42 is connected to the lower end of the descending part 412 of the transition section flue 41 , and the smoke outlet end of the convection section flue 42 is formed with a smoke outlet 421 for connecting with a corresponding dust collector. Moreover, in a preferred embodiment of the present invention, as shown in FIG. 4 , a convection tube bundle 422 is arranged in the convection section flue 42 .

Since the transition section flue 41 is provided, when the high-temperature flue gas containing dust enters the transition section flue 41, the dust in the high-temperature flue gas can fall by gravity during the rising process, thereby preventing the dust from sticking to the furnace body. on the inner wall. Thereby, it is possible to reduce the ash accumulation and ash removal operation in the furnace body 1, and improve the service life and waste heat recovery efficiency of the furnace body. Moreover, since the flue 41 in the transition section has an ascending portion 411 and a descending portion 412, the length of the flue is increased, and the time for the high-temperature flue gas to run in the flue is prolonged, thereby further improving the efficiency of recovering heat from the high-temperature flue gas . In addition, by arranging the convection tube bundle 422 in the convection flue 42, the efficiency of heat recovery from high-temperature flue gas can be further improved.

The following describes the operation flow of the zinc leaching slag treatment device according to the embodiment of the present invention. As shown in Figure 5, the zinc leaching slag treatment process according to the embodiment of the present invention is as follows:

S1) Add zinc leaching slag and flux from the zinc leaching slag and flux feeding port 112 of the first-stage side-blowing furnace 1 into the first-stage side-blowing furnace 1;

S2) Spray oxygen-containing gas and fuel into the first molten pool of the first-stage side-blown furnace 1 through the first side-blown lance 15 to complete slagging and smelting and partially reduce zinc and other valuable metals in the zinc leaching slag , to obtain flue gas comprising fume dust containing zinc and other valuable metals;

S3) Add the molten slag produced by slagging and smelting in the first-stage side-blowing furnace 1 to the second molten pool of the second-stage side-blowing furnace 2 through the hot slag chute 3 from the hot slag feed port 221 of the second-stage side-blowing furnace 2;

S4) Spray oxygen-containing gas and reducing agent into the second molten pool through the second side blowing lance 25 to reduce zinc and other valuable metals in the molten slag to obtain smoke containing zinc and other valuable metals flue gas and spoil; and

S5) The flue gas is discharged from the second smoke exhaust port and the waste slag is discharged from the second slag discharge port 232 .

The zinc leaching slag treatment process according to the embodiment of the utility model has at least the following beneficial effects:

By implementing the zinc leaching slag treatment process of the embodiment of the present invention, the valuable metals such as zinc in the zinc leaching slag can be fully recovered, so it can not only save precious metal resources, but also prevent the zinc leaching slag containing valuable metals such as zinc from Pollution to the environment; through the implementation of the zinc leaching slag treatment process of the embodiment of the utility model, the melting and depletion process can be continuously carried out, so the recovery rate of valuable metals such as zinc can be improved to a certain extent.

In addition, preferably, the zinc leaching slag treatment process also includes the following steps:

S6) Recover the waste heat in the flue gas discharged from the first smoke outlet 112 through the first waste heat boiler;

S7) collecting the dust containing zinc and other valuable metals in the flue gas discharged from the first smoke outlet 112 through the first dust collector;

S8) Recover the waste heat in the flue gas discharged from the second smoke outlet 212 through the second waste heat boiler; and

S9) The dust containing zinc and other valuable metals in the flue gas discharged from the second smoke outlet 212 is collected by the second dust collector.

In this way, on the one hand, the heat in the high-temperature flue gas discharged from the first-stage side-blowing furnace 1 and the second-stage side-blowing furnace 2 can be fully recovered through the first waste heat boiler and the second waste heat boiler, and the recovered heat can be reused ( Such as power generation, heating) to reduce comprehensive energy consumption; on the other hand, it is also possible to recover the smoke and dust in the high-temperature flue gas discharged from the first-stage side-blowing furnace 1 and the second-stage side-blowing furnace 2 through the first dust collector and the second dust collector, to avoid polluting the environment.

In addition, preferably, the zinc leaching slag treatment process further includes the following step: S10) discharging crude lead or matte from the first outlet. In this way, the lead and/or matte is recovered, and the pollution of the environment by the lead and/or matte is prevented.

In addition, in the above treatment process, preferably, the molten pool temperature range of the first-stage side-blowing furnace 1 is 1150-1250°C, and the molten pool temperature range of the second-stage side-blowing furnace 2 is 1250-1350°C, so as to facilitate zinc leaching The zinc in the slag is fully gasified, thereby improving the recovery rate of zinc.

Moreover, the fuels and reducing agents used in the above treatment process can also be various fuels and reducing agents commonly used in this field, such as industrial coke. However, from the perspective of cost reduction, materials such as pulverized coal, natural gas, coal gas or liquefied petroleum gas are preferably used as reducing agents in the above processes.

In addition, the inventors of the utility model have found through a large number of experiments that when the volume ratio of oxygen in the oxygen-containing gas in the first-stage side-blowing furnace 1 is 25% to 40%, and the oxygen-containing gas in the second-stage side-blowing furnace 2 is air, the zinc The treatment of leaching residue is relatively sufficient. Therefore, in the above treatment process, preferably, the volume ratio of oxygen in the oxygen-containing gas in the first-stage side-blowing furnace 1 is 25% to 40%, and the oxygen-containing gas in the second-stage side-blowing furnace 2 is air.

In addition, the inventor of the utility model found through testing that in step S7) and step S9), other valuable metals recovered by the first dust collector and the second dust collector include at least one of indium, germanium and silver.

In addition, in a specific embodiment of the above zinc leaching slag treatment process, the main components and proportions of the zinc leaching slag to be smelted are: Zn 8% to 20%, Fe/SiO ₂ 0.8 to 1.6 (weight ratio ), CaO/SiO ₂ 0.2-0.6 (weight ratio). And, in terms of mass percentage, the main components of zinc leaching slag are as follows: Zn 8.66%, Pb 1.29%, Cu 0.46%, Fe 40%, SiO ₂ 1.29%, CaO 0.37%.

Moreover, in the above specific embodiment, the temperature of the melting pool in the first-stage side-blowing furnace 1 is 1150-1250° C., and the volume ratio of oxygen in the oxygen-containing gas is 30%. After being smelted in a side-blown furnace 1, molten slag and zinc fumes containing lead, indium and silver are produced. In terms of mass percentage, the main components of the molten slag are as follows: Zn 5.34%, Pb 0.88%, Cu 0.41%, Fe 37.25%, SiO ₂ 23.38%, CaO 9.39%.

The above-mentioned molten slag enters the second-stage side-blowing furnace 2 through the chute for depletion blowing. The temperature of the molten pool in the second-stage side-blowing furnace 2 is 1250-1350° C., and the volume ratio of oxygen in the oxygen-containing gas is 21%. After being depleted and reduced by the second-stage side-blowing furnace 2, zinc fume and slag containing lead, indium, and silver are produced. The slag is discharged after water quenching and can be used as a cement raw material. The main components of the slag are as follows in terms of mass percentage: Zn 1.62%, Pb 0.12%, Cu 0.42%, Fe 38.1%, SiO ₂ 25.39%, CaO 9.94%.

In addition, the slag obtained according to the leaching slag processing device of the embodiment of the present invention can also be used as a raw material for making cement.

From the above results, it can be seen that after using the zinc leaching slag treatment device of the embodiment of the present invention to continuously blow the zinc leaching slag twice, the mass percentages of zinc and lead contained in the generated slag have been greatly reduced. Will not cause pollution to the environment. Therefore, the above zinc leaching slag treatment process can not only save precious metal resources, but also prevent environmental pollution caused by zinc and lead.

Moreover, compared with the existing treatment process using a rotary kiln under the same conditions, the mass percentages of zinc and lead contained in the slag obtained through the zinc leaching slag treatment process of the embodiment of the present invention are significantly lower. Therefore, the above zinc leaching slag treatment process can improve the recovery rate of valuable metals such as zinc to a certain extent.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structures, materials or features are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be construed as limitations of the present invention. The above-mentioned embodiments can be changed, modified, replaced and modified within the scope of the present utility model under the principle and purpose.

Claims (9)

1. A zinc leaching slag treatment device, characterized in that, comprising: One section of side blowing furnace, said one section of side blowing furnace comprising: The first furnace body defines the first molten pool and includes a first upper furnace body, a first middle furnace body, a first lower furnace body and a first hearth, and the first furnace body has a zinc The leaching slag and flux feeding port, the first smoke exhaust port, the first slag discharge port, the first supplementary air port and the first spray gun socket formed on the side wall of the first furnace body; and a first side blowing lance, the first side blowing lance is inserted into the socket of the first lance, and is used to inject oxygen-containing gas and fuel into the first melting pool of the first furnace body; and Two-stage side-blowing furnace, said two-stage side-blowing furnace comprises: The second furnace body, the second furnace body includes a second upper furnace body, a second middle furnace body and a second lower furnace body and defines a second molten pool, and the second furnace body has a hot slag chute and a second furnace body The hot slag feed port connected to the first slag discharge port, the second smoke discharge port, the second slag discharge port, the second supplementary air port and the second spray gun socket formed on the side wall of the second furnace body; and A second side blowing lance, the second side blowing lance is inserted into the socket of the second lance, and is used for injecting oxygen-containing gas and reducing agent into the second melting pool of the second furnace body. 2. zinc leaching slag treatment device according to claim 1, is characterized in that, also comprises: a first waste heat boiler, the first waste heat boiler is connected to the first exhaust port; a first dust collector, the first dust collector is connected to the first waste heat boiler, and is used to collect smoke and dust in the flue gas discharged from the first smoke outlet; a second waste heat boiler connected to the second exhaust port; and A second dust collector, the second dust collector is connected to the second waste heat boiler, and is used to collect smoke and dust in the flue gas discharged from the second smoke outlet. 3. The zinc leaching slag treatment device according to claim 2, wherein each of the first and second waste heat boilers comprises: A flue in the transition section, the flue in the transition section includes an ascending part and a descending part, the upper end of the ascending part is connected to the upper end of the descending part, and the lower end of the ascending part is connected to the smoke outlet; and Convection section flue, the smoke inlet of the convection section flue is connected to the lower end of the descending part of the transition section flue, and the smoke outlet end of the convection section flue is formed with a smoke outlet, and the convection section smoke A convection tube bundle is arranged in the channel. 4. The zinc leaching slag treatment device according to claim 1, characterized in that, the first furnace hearth has a first discharge port. 5 . The zinc leaching slag treatment device according to claim 1 , characterized in that, the second furnace body further comprises a second hearth, and the second hearth has a second discharge port. 6 . 6. The zinc leaching slag treatment device according to claim 1, characterized in that, the second furnace body also has a flux cold material feeding port. 7. The zinc leaching slag treatment device according to claim 1, characterized in that, the first smoke outlet is arranged on the top of the first upper furnace body, and the second smoke outlet is arranged on the first Two on the top of the furnace body. 8. The zinc leaching slag treatment device according to claim 1, characterized in that, the furnace walls of the first upper furnace body and the second upper furnace body are membrane wall structures, and the first middle furnace body And the second middle furnace body is a water jacket structure, and the first lower furnace body is a water jacket lined with refractory material. 9 . The zinc leaching slag treatment device according to claim 8 , characterized in that, the second lower furnace body is constructed as a structure lined with refractory material and provided with a water jacket or adopts a full water jacket structure. 10 .

Images