CN105907988A - Device for lead and zinc ore smelting - Google Patents

Abstract

The invention discloses equipment for smelting lead-zinc ore, comprising: an oxidation smelting furnace with a lead-zinc ore inlet, a flux inlet, a smelting flue gas outlet and a melt outlet, and the melt contains zinc oxide and lead oxide; power frequency electrothermal reduction Furnace with melt inlet, reducing agent inlet, liquid lead outlet, slag outlet and zinc-containing fume outlet connected to the melt outlet; zinc rain condenser with zinc-containing fume inlet, liquid zinc outlet and gas The outlet, the zinc-containing flue gas inlet is connected with the zinc-containing flue gas outlet. Using this equipment, the lead-zinc ore can be directly oxidized and melted, and then supplied to the power frequency electrothermal reduction furnace in the state of high-temperature melt. In the furnace body, zinc oxide is reduced to metal zinc vapor by high-temperature carbon, and further condensed to obtain a liquid state. metal zinc. The lead oxide entering the furnace body is reduced to liquid metal lead by high-temperature carbon, and the liquid metal lead slag composed of iron, silicon, calcium, aluminum, magnesium and other oxides descends to the lower settling chamber of the vertical well type power frequency electric furnace.

Description

Equipment for smelting lead-zinc ore

technical field

The invention relates to the field of metallurgy. Specifically, the present invention relates to equipment for smelting lead-zinc ore.

Background technique

Since lead and zinc resources are mostly symbiotic ores, they are generally sorted into lead concentrate and zinc concentrate after mining, and sent to lead smelters and zinc smelters for separate processing. Due to the difficulty of thorough separation, there is always a certain amount of zinc impurity in the lead concentrate, and a certain amount of lead impurity in the zinc concentrate. After smelting, the zinc fume produced by the lead factory needs to be sent to the zinc factory for treatment, and the lead and silver slag produced by the zinc factory needs to be sent to the lead factory for treatment.

Therefore, the current lead-zinc ore smelting methods still need to be improved.

Contents of the invention

The present invention aims at solving one of the above technical problems at least to a certain extent or at least providing a useful commercial choice. Therefore, an object of the present invention is to propose a method capable of effectively smelting lead-zinc ore.

The present invention has been accomplished based on the following findings of the inventors:

When the melt of zinc oxide and lead oxide is reduced by using a power frequency furnace, the reduction product zinc will become gaseous, while the reduction product lead will remain in liquid state.

In one aspect of the present invention, the present invention provides a kind of equipment for smelting lead-zinc ore. According to an embodiment of the present invention, the equipment includes: an oxidation smelting furnace, and the oxidation smelting furnace has a lead-zinc ore inlet, a flux inlet , smelting flue gas outlet and melt outlet, the melt contains zinc oxide and lead oxide; power frequency electric heat reduction furnace, the power frequency electric heat reduction furnace has a melt inlet, a reducing agent inlet, a liquid lead outlet, a slag outlet and A zinc-containing flue gas outlet, the melt inlet is connected to the melt outlet; and a zinc rain condenser, the zinc rain condenser has a zinc-containing flue gas inlet, a liquid zinc outlet and a coal gas outlet, and the zinc-containing fume The gas inlet is connected with the zinc-containing flue gas outlet.

Using this equipment, the lead-zinc ore can be effectively smelted. As mentioned above, using this process, there is no need to sort the lead-zinc ore, and the lead-zinc ore is directly oxidized and melted, and then supplied in a high-temperature melt state To the power frequency electric reduction furnace, in the furnace body, zinc oxide can be reduced to metal zinc vapor by high-temperature carbon, and then liquid metal zinc can be obtained through condensation. The lead oxide entering the furnace body is reduced to liquid metal lead by high-temperature carbon, and the liquid lead slag composed of iron, silicon, calcium, aluminum, magnesium and other oxides descends to the lower settling chamber of the vertical well type power frequency electric furnace. The slag and lead are separated in the settling chamber. Metallic lead is released from the outlet at the lower part of the settling chamber. According to the embodiment of the present invention, the slag can be discharged from the discharge port at the upper part of the settling chamber. The slag is sold outside after water quenching.

In addition, the equipment for smelting lead-zinc ore according to the above-mentioned embodiments of the present invention may also have the following additional technical features:

In some embodiments of the present invention, a double bell feeder is provided at the inlet of the reducing agent. As a result, device sealing performance can be significantly improved.

In some embodiments of the present invention, a waste heat boiler is also included, and the smoke inlet of the waste heat boiler is connected with the smelting smoke outlet. Thus, the waste heat of the system can be fully utilized.

In some embodiments of the present invention, a dust remover is also included, and the inlet of the dust remover is connected with the smoke outlet of the waste heat boiler.

In some embodiments of the present invention, the dust collector is an electric dust collector.

In some embodiments of the present invention, the power frequency electric reduction furnace includes a vertical reduction section and a horizontal settling section, and coils are arranged on the outer walls of the vertical reducing section and the horizontal settling section. Thus, the furnace temperature can be effectively maintained.

In some embodiments of the present invention, the melt is input into the power frequency electric reduction furnace through a siphon port. Thereby, the device sealing performance can be further improved.

In some embodiments of the present invention, the reducing agent is coke.

In some embodiments of the present invention, the reducing agent further includes a magnetizer.

In some embodiments of the present invention, the magnetizer is graphite.

In some embodiments of the present invention, the graphite is 10-50% of the mass of the reducing agent.

In some embodiments of the invention, the temperature of the melt is at least 900 degrees Celsius.

In some embodiments of the invention, the liquid lead is discharged through a siphon. Thereby, the device sealing performance can be further improved.

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 invention will become apparent and comprehensible from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 has shown the cross-sectional structure schematic diagram of the equipment that is used for lead-zinc ore smelting according to an embodiment of the present invention;

Fig. 2 has shown the partial structural plan view in the equipment that is used for lead-zinc ore smelting of another embodiment of the present invention;

Fig. 3 has shown the structural representation of the equipment that is used for lead-zinc ore smelting of another embodiment of the present invention;

Fig. 4 has shown the structural representation of the equipment that is used for lead-zinc ore smelting of another embodiment of the present invention;

Fig. 5 shows a schematic flow chart of implementing a lead-zinc ore smelting method using the equipment for lead-zinc ore smelting according to an embodiment of the present invention.

detailed description

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 designate 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 and should not be construed as limiting the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or Elements must have certain orientations, be constructed and operate in certain orientations, and therefore should not be construed as limitations on the invention.

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, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the present invention, unless otherwise clearly 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 , or integrated; 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 or the interaction relationship between two components, unless otherwise specified limit. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first and second feature may be in direct contact with the second feature through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

Embodiments of the present invention will be described in detail below, and the embodiments described below by referring to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

All references mentioned herein are hereby incorporated by reference.

Unless defined to the contrary, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Unless indicated to the contrary, the techniques used or referred to herein are standard techniques well known to those of ordinary skill in the art. The materials, methods, and examples are illustrative only and not limiting.

The present invention has been accomplished based on the following findings of the inventors:

When the melt of zinc oxide and lead oxide is reduced by using a power frequency furnace, the reduction product zinc will become gaseous, while the reduction product lead will remain liquid.

In one aspect of the present invention, the present invention proposes a kind of equipment that is used for lead-zinc ore smelting, according to the embodiment of the present invention, with reference to Fig. Rain condenser 300.

According to an embodiment of the present invention, the oxidation smelting furnace 100 has a lead-zinc ore inlet 101, a flux inlet 102, a smelting flue gas outlet 103, and a melt outlet 104, and is suitable for performing oxidation smelting on a mixture obtained by mixing lead-zinc ore with a flux , so that a melt containing zinc oxide and lead oxide can be obtained. Specifically, the lead-zinc ore may be a lead-zinc composite sulfide ore, and an appropriate slagging agent may be added during the oxidation smelting process. It should be noted that those skilled in the art can select the flux used and the conditions of oxidation smelting according to actual needs, and the lead-zinc ore inlet 101 and the flux inlet 102 can be the same inlet or two independent inlets

According to one embodiment of the invention, the temperature of the melt containing zinc oxide and lead oxide is at least 900 degrees Celsius. Thus, the environmental protection level of lead-zinc ore smelting in the subsequent process can be further improved.

According to an embodiment of the present invention, the power frequency electric heating reduction furnace 200 has a melt inlet 201, a reducing agent inlet 202, a liquid lead outlet 203, a slag outlet 204 and a zinc-containing flue gas outlet 205, and the melt inlet 201 is connected to the melt outlet 104 , and is suitable for using a reducing agent to carry out reduction treatment and slag settlement treatment on the melt containing zinc oxide and lead oxide obtained above in a power frequency electrothermal reduction furnace, so that zinc-containing flue gas, liquid lead and slag can be obtained.

According to an embodiment of the present invention, the melt containing zinc oxide and lead oxide obtained in the oxidation smelting process can be supplied to the industrial frequency electrothermal reduction furnace through the siphon port. The inventors found that by adopting a siphon inlet to feed materials, it is possible to effectively feed materials under sealed conditions, thereby further improving the efficiency of lead-zinc ore smelting.

According to yet another embodiment of the present invention, with reference to Fig. 1 and Fig. 2, the industrial frequency electrothermal reduction furnace 200 may include a vertical reduction section 21 and a horizontal settling section 22, and the outer walls of the vertical reduction section 21 and the horizontal settling section 22 Coils 23 are arranged on them. Specifically, as shown in Figure 1, the lower end passage of the vertical reduction section 21 is connected with the upper end passage of the horizontal settling section 22, and the lower end passage of the vertical reduction section 21 is inclined upward, thereby avoiding the addition of reducing agent in the reduction section into the subsidence section. Therefore, by arranging coils on the outer walls of the vertical reduction section 21 and the horizontal settling section 22, the coils are used to generate an alternating magnetic field to maintain the furnace temperature of the reduction section and the settling section, thereby further improving the efficiency of lead-zinc ore smelting. According to a specific embodiment of the present invention, an induction coil of 200-400 kilowatts may be used.

According to yet another embodiment of the present invention, the reducing agent may be coke. Thus, the efficiency of lead-zinc ore smelting can be further improved.

According to yet another embodiment of the present invention, the reducing agent may further include a magnetizer. Therefore, under the action of the alternating magnetic field generated by the external coil, the magnetizer can effectively keep the temperature in the furnace stable, thereby further improving the efficiency of smelting lead-zinc ore.

According to yet another embodiment of the present invention, the magnetizer may be graphite. The inventors found that graphite can effectively conduct magnetism without introducing impurities into subsequent reactions, thereby further improving the efficiency of lead-zinc ore smelting. Specifically, the mixture of coke and graphite block is directly added to the reduction section in the power frequency electric reduction furnace, the coke is used as a reducing agent, and the graphite block is used as a magnetic conduction heating material (the carbon in graphite also has certain reducibility during actual production), A single-core coil is installed outside the furnace shell of the reduction section. When the alternating current is applied to the coil, a changing magnetic field is generated. The graphite block starts to generate heat under the influence of the changing magnetic field and heats the surrounding coke and melt to maintain the thermal balance of the reaction zone, so that the temperature of the entire direct reduction section meets Requirements for direct reduction of lead and zinc materials.

According to an embodiment of the present invention, graphite may be 10-50% of the weight of the reducing agent. Thus, the efficiency of lead-zinc ore smelting can be further improved. The inventors found that if the proportion of graphite is too small, the temperature in the reduction space will not be stable enough, and if the proportion of graphite is too large, the efficiency of reduction treatment will be affected.

According to yet another embodiment of the present invention, the liquid lead is discharged through a siphon. Thus, the efficiency of lead-zinc ore smelting can be further improved.

According to yet another embodiment of the present invention, a double bell feeder 24 is provided at the reducing agent inlet 202 . Specifically, the feeding bell filled with hot coke and graphite blocks is accurately placed on the double bell feeder through a special crane, and then the bottom valve of the feeding bell is lowered, and the hot coke and graphite fall into the upper hopper of the double bell feeder , and then lift the feeding bell, and then put down the upper bottom valve of the double bell feeder, coke and graphite fall into the lower hopper of the double material bell feeder, at this time, lift the upper bottom valve, close the gas channel, and then open the double material bell feeder Finally, the hot coke and graphite blocks are added to the reduction reaction zone of the power frequency electric reduction furnace through the reducing agent inlet, and the cycle operation is used to continuously replenish the coke and graphite blocks that are continuously consumed in the reaction zone.

In this step, specifically, when the melt containing zinc oxide and lead oxide falls into the reduction section of the power frequency electric heating reduction furnace and encounters red-hot coke, a reduction reaction will immediately occur to generate molten metal lead, slag and zinc-containing Vapors and fumes of carbon monoxide/carbon dioxide. The molten metal lead and slag flow downward, and flow into the precipitation section through the lower channel of the reduction section from the upper channel of the settling section (inclined upward to prevent coke and graphite blocks from falling into the settling section). Coils are also set outside the furnace shell of the precipitation section, and the molten metal lead will generate heat to maintain the furnace temperature under the action of the changing magnetic field, thereby maintaining a certain fluidity. Finally, the molten metallic lead is released from the siphon lead outlet at the bottom of the precipitation section, and after a small amount of slag has accumulated to a certain extent, the slag is released through the upper slag outlet.

According to an embodiment of the present invention, the zinc rain condenser 300 has a zinc-containing flue gas inlet 301, a liquid zinc outlet 302, and a gas outlet 303. The zinc-containing flue gas inlet 301 is connected to the zinc-containing flue gas outlet 205, and is suitable for connecting the The zinc-containing flue gas obtained in the electrothermal reduction furnace is condensed in order to obtain liquid zinc and coal gas. According to an embodiment of the present invention, the zinc rain condenser can be used to condense the zinc-containing flue gas for smelting lead-zinc ore. Thus, the use of zinc rain can condense the metal zinc carried in the zinc-containing flue gas, while the carbon monoxide and/or carbon dioxide carried in it continue to exist in gaseous form, and are recycled in the form of coal gas after further washing and purification. Specifically, the liquid zinc rain lead captured by the zinc rain condenser is pumped to the zinc liquid cooling tank, after cooling and separating the lead, part of the zinc liquid is cast into rough zinc ingots, and part of the zinc liquid is returned to the zinc rain to condense The detector cycle is used to capture zinc vapor.

Therefore, the equipment for smelting lead-zinc ore according to the embodiment of the present invention can effectively smelt lead-zinc ore. After the zinc ore is oxidized and melted, it is supplied to a power frequency electric reduction furnace in a state of high-temperature melt. In this furnace body, zinc oxide can be reduced to metal zinc vapor by high-temperature carbon, and then liquid metal zinc can be obtained through condensation. The lead oxide entering the furnace body is reduced to liquid metal lead by high-temperature carbon, and the liquid lead slag composed of iron, silicon, calcium, aluminum, magnesium and other oxides descends to the lower settling chamber of the vertical well type power frequency electric furnace. The slag and lead are separated in the settling chamber. Metallic lead is released from the outlet at the lower part of the settling chamber. According to the embodiment of the present invention, the slag can be discharged from the discharge port at the upper part of the settling chamber. The slag is sold outside after water quenching.

Referring to FIG. 3 , the equipment for smelting lead-zinc ore according to the embodiment of the present invention further includes: a waste heat boiler 400 .

According to the embodiment of the present invention, the smoke inlet of the waste heat boiler 400 is connected with the smelting flue gas outlet 103 . Thus, the waste heat of the system can be fully utilized.

Referring to FIG. 4 , the equipment for smelting lead-zinc ore according to the embodiment of the present invention further includes: a dust collector 500 .

According to the embodiment of the present invention, the inlet of the dust collector 500 is connected with the smoke outlet of the waste heat boiler 400 . According to one embodiment of the present invention, the dust collector may be an electric dust collector. Thereby, dust removal efficiency can be further improved.

According to an embodiment of the present invention, the equipment for smelting lead-zinc ore according to the embodiment of the present invention may have at least one of the following advantages:

According to the embodiment of the present invention, the mineral processing process of lead-zinc mineral resources is simplified, the recovery rate of valuable metals is improved, and the mineral processing cost is reduced.

According to the embodiment of the present invention, lead and zinc are smelted together simultaneously, which saves the back-and-forth transportation of intermediate materials produced by associated elements between the lead factory and the zinc factory in the original process, eliminates the transportation of intermediate materials, and reduces the production cost of main metals.

According to the embodiment of the present invention, lead and zinc are reduced by electric heating in a power frequency furnace, which avoids the use of air supply or oxygen supply in the original process, and relies on burning fuel for heat supply to maintain the heat balance of the reduction process. Burning fuel to maintain temperature, the amount of flue gas is large, and the flue gas takes away more waste heat, so the energy consumption is higher. Electrothermal reduction consumes carbon or hydrogen as the reducing agent only by the oxygen brought in by materials such as lead oxide, zinc oxide, and ferric oxide that need to be reduced in the added high-temperature melt. The reducing agent consumption is a theoretical value, the amount of flue gas produced is also a theoretical value, and the energy consumption is the lowest among all processes.

According to the embodiment of the present invention, at present, more than 85% of zinc in the world is produced by hydrometallurgy process, and its leaching slag is hazardous waste, which is an environmental protection problem, and its harmless treatment, the energy consumption of the existing process is very high . The process can economically and effectively solve the problem of environmental pollution caused by zinc leaching slag.

According to the enlarged test parameters of the authorized invention CN200610066648.4 "a lead smelting method and a device for realizing the lead smelting method", the recovery rate of lead and zinc metals is very high by adopting shaft type electrothermal reduction. Most of the associated elements other than lead and zinc, such as Au, Ag, Cu, Ni, Bi, Sn, are reduced into crude lead, while volatiles such as Cd, Ga, In, Il, Ge, etc. are all condensed into crude zinc. With the refining process of crude lead and crude zinc, these associated metals can be recovered one by one to realize highly comprehensive utilization. As for the As and Hg associated elements contained in the lead-zinc mixed ore, most of them have been removed in the flue gas during the first oxidation smelting process, which is not discussed within the scope of this patent.

In the prior art, an ore-thermal electric resistance furnace is used for heating, and there are many electrode insertion holes, and the electrode insertion holes are difficult to be absolutely sealed, and the flue gas leaks to some extent and affects the environment. This patent adopts industrial frequency electric furnace for heating, without electrode insertion holes, the furnace body is completely sealed, and no smoke leaks out, which has the best environmental protection benefits. Reduction by submerged electric furnace requires air or nitrogen to inject pulverized coal into the submerged electric furnace as a reducing agent. Air or nitrogen will reduce the concentration of zinc vapor, and the slag contains Zn≥3%, while reducing liquid lead by using a power frequency electric furnace Zinc material has a high concentration of zinc vapor, and the zinc content in slag can reach a theoretical value of ≤0.22%. Therefore, using an ore-thermal electric furnace to reduce the molten lead-zinc material needs to be followed by a fuming furnace for further processing of the slag, but it is not necessary to use a power frequency electric furnace. The slag is further processed.

For the convenience of understanding, the method for smelting lead-zinc ore implemented by the equipment for smelting lead-zinc ore according to the embodiment of the present invention will be described in detail below with reference to FIG. 5 . According to an embodiment of the invention, the method includes:

S100: Mix lead-zinc ore with flux, and subject the resulting mixture to oxidative smelting

In this step the lead-zinc ore is mixed with a flux and the resulting mixture is oxidatively smelted in order to obtain a melt containing zinc oxide and lead oxide. Specifically, the lead-zinc ore in this article can refer to high-grade raw ores with a lead content of >40wt%, or lead-zinc concentrates with a total lead and zinc of >50wt% after beneficiation of general lead-zinc raw ores, and in the oxidation smelting process Appropriate slagging agents can be added. It should be noted that those skilled in the art can select the flux used and the conditions of oxidative smelting according to actual needs.

According to one embodiment of the invention, the temperature of the melt containing zinc oxide and lead oxide is at least 900 degrees Celsius. Thus, the efficiency of lead-zinc ore smelting in the subsequent process can be further improved.

S200: Use a reducing agent to perform reduction treatment and slag settlement treatment on the melt containing zinc oxide and lead oxide in a power frequency electric reduction furnace

In this step, using a reducing agent, the melt containing zinc oxide and lead oxide obtained above is subjected to reduction treatment and slag settlement treatment in a power frequency electrothermal reduction furnace, so as to obtain zinc-containing flue gas, liquid lead and slag.

According to an embodiment of the present invention, the melt containing zinc oxide and lead oxide obtained in the oxidation smelting process can be supplied to the industrial frequency electrothermal reduction furnace through the siphon port. The inventors found that by adopting a siphon inlet to feed materials, the materials can be effectively fed under sealed conditions, thereby further improving the environmental protection level of lead-zinc ore smelting.

According to yet another embodiment of the present invention, the power frequency electrothermal reduction furnace may have a plurality of coils, and the plurality of coils are arranged on the outer wall of the power frequency electrothermal reduction furnace. Therefore, the furnace temperature can be maintained by using the coil to generate an alternating magnetic field, thereby further improving the efficiency of lead-zinc ore smelting. According to a specific embodiment of the present invention, an induction coil of 200-400 kilowatts may be used.

According to yet another embodiment of the present invention, the reducing agent may be coke. Thus, the efficiency of lead-zinc ore smelting can be further improved.

According to yet another embodiment of the present invention, the reducing agent may further include a magnetizer. Therefore, under the action of the alternating magnetic field generated by the external coil, the magnetizer can effectively keep the temperature in the furnace stable, thereby further improving the efficiency of smelting lead-zinc ore.

According to yet another embodiment of the present invention, the magnetizer may be graphite. The inventors found that graphite can effectively conduct magnetism without introducing impurities into subsequent reactions, thereby further improving the efficiency of lead-zinc ore smelting.

According to an embodiment of the present invention, graphite may be 10-50% of the weight of the reducing agent. Thus, the efficiency of lead-zinc ore smelting can be further improved. The inventors found that if the proportion of graphite is too small, the temperature in the reduction space will not be stable enough, and if the proportion of graphite is too large, the efficiency of reduction treatment will be affected.

According to yet another embodiment of the present invention, the liquid lead is discharged through a siphon. Thus, the efficiency of lead-zinc ore smelting can be further improved.

S300: Condensing zinc-containing flue gas

In this step, the zinc-containing flue gas obtained in the industrial frequency electric reduction furnace is condensed so as to obtain liquid zinc and coal gas. According to an embodiment of the present invention, the zinc rain condenser can be used to condense the zinc-containing flue gas for smelting lead-zinc ore. Thus, the use of zinc rain can condense the metal zinc carried in the zinc-containing flue gas, while the carbon monoxide and/or carbon dioxide carried in it continue to exist in gaseous form, and are recycled in the form of coal gas after further washing and purification.

Therefore, using the equipment for smelting lead-zinc ore in the embodiment of the present invention to implement the lead-zinc ore smelting method does not need to sort the lead-zinc ore, and directly oxidizes and melts the lead-zinc ore, and then smelts the lead-zinc ore in a high-temperature melt state It is supplied to a power frequency electrothermal reduction furnace. In the furnace body, zinc oxide can be reduced to metal zinc vapor by high-temperature carbon, and then liquid metal zinc can be obtained through condensation. The lead oxide entering the furnace body is reduced to liquid metal lead by high-temperature carbon, and the liquid lead slag composed of iron, silicon, calcium, aluminum, magnesium and other oxides descends to the lower settling chamber of the vertical well type power frequency electric furnace. The slag and lead are separated in the settling chamber. Metallic lead is released from the outlet at the lower part of the settling chamber. According to the embodiment of the present invention, the slag can be released from the discharge port on the upper part of the settling chamber, and the slag can be sold outside after water quenching.

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 , structure, material or characteristic is 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 embodiments are exemplary and cannot be construed as limitations to the present invention. Variations, modifications, substitutions, and modifications to the above-described embodiments are possible within the scope of the present invention.

Claims (13)

1. A device for smelting lead-zinc ore, characterized in that it comprises: An oxidation smelting furnace, the oxidation smelting furnace has a lead-zinc ore inlet, a flux inlet, a smelting flue gas outlet and a melt outlet, and the melt contains zinc oxide and lead oxide; A power frequency electrothermal reduction furnace, the power frequency electrothermal reduction furnace has a melt inlet, a reducing agent inlet, a liquid lead outlet, a slag outlet and a zinc-containing flue gas outlet, and the melt inlet is connected to the melt outlet; and A zinc rain condenser, the zinc rain condenser has a zinc-containing flue gas inlet, a liquid zinc outlet and a gas outlet, and the zinc-containing flue gas inlet is connected to the zinc-containing flue gas outlet. 2. The equipment according to claim 1, characterized in that a double bell feeder is arranged at the inlet of the reducing agent. 3. The equipment according to claim 1 or 2, further comprising a waste heat boiler, the smoke inlet of the waste heat boiler is connected with the smelting flue gas outlet. 4. The equipment according to claim 3, further comprising a dust remover, the inlet of the dust remover is connected with the smoke outlet of the waste heat boiler. 5. The device according to claim 4, characterized in that the dust collector is an electric dust collector. 6. The equipment according to claim 1, characterized in that the power frequency electrothermal reduction furnace comprises a vertical reduction section and a horizontal settling section, and the outer walls of the vertical reducing section and the horizontal settling section Both are provided with coils. 7. The equipment according to claim 6, characterized in that, the melt is input into the power frequency electrothermal reduction furnace through a siphon port. 8. The apparatus of claim 1, wherein the reducing agent is coke. 9. The device according to claim 8, characterized in that the reducing agent further includes a magnetizer. 10. The apparatus according to claim 9, wherein the magnetic conductor is graphite. 11. The device according to claim 10, characterized in that the graphite is 10-50% of the mass of the reducing agent. 12. The apparatus of claim 1, wherein the temperature of the melt is at least 900 degrees Celsius. 13. The apparatus of claim 1, wherein liquid lead is discharged through a siphon.