CN116147336A - Sulfur-containing multi-metal solid waste smelting furnace and smelting treatment method thereof - Google Patents

Abstract

The invention provides a smelting furnace for treating sulfur-containing polymetallic solid waste and its use method, wherein the smelting furnace includes a furnace body, and a smelting chamber is formed in the furnace body; the smelting chamber includes interconnected oxidation smelting zones and a reduction smelting zone; wherein, a first charging port for feeding solid waste materials is set at the top of the oxidation smelting zone, and a second charging port for feeding reducing agent raw materials is set at the top of the reduction smelting zone; and , the solid waste material is oxidized and smelted into liquid slag in the oxidation smelting zone and flows into the reduction smelting zone, and the metal elements in the liquid slag are reduced with the reducing agent raw material in the reduction smelting zone reacts and settles at the bottom of the reduction smelting zone. The smelting furnace for treating sulfur-containing polymetallic solid waste provided by the invention can solve the problems of low economic benefit and easy waste of resources in the existing solid waste treatment methods.

Description

Furnace for smelting polymetallic solid waste containing sulfur and its smelting treatment method

technical field

The invention relates to the technical field of solid waste recycling and recycling, and more specifically, to a smelting furnace for treating sulfur-containing polymetallic solid waste and a treatment method thereof.

Background technique

Sulfur-containing polymetallic solid waste is commonly found in non-ferrous metallurgy, chemical industry, electroplating and other production industries, such as pyrite slag, gypsum slag, electrolytic manganese slag, sludge, etc. In these solid wastes, there are more valuable elements such as S, Fe, and Cu.

The existing technology for this kind of solid waste is treated as follows: if the solid waste has a high content of valuable metal elements, the remaining tailings are directly recycled after the existing mainstream metallurgical process is used to recover most of the metal elements inside. Takeaway cement and building materials companies use it; and if the content of valuable metal elements in solid waste is very low, and the grade is far lower than the requirements of various processes, even if the grade can be improved to meet the processing requirements, the processing party will have low processing efficiency and recovery costs. Due to high-level reasons, it is impossible to carry out actual treatment. Therefore, for this kind of solid waste, part of it will be used in the production of building materials, but most of it will be stored directly, and there is no other suitable disposal method.

It can be seen that for solid wastes containing sulfur and polymetallic elements (especially solid wastes with low content of valuable metal elements), due to the existing treatment methods and production processes for these solid wastes, the product quality is poor and the energy consumption is high. , so that the overall economic benefits are poor, so that these solid wastes are still unable to be efficiently utilized on a large scale and continue to be piled up, which not only causes waste of resources, but also brings a lot of pressure to local environmental protection. The emergence of new processes and new technologies must be achieved through technical improvement of various equipment or system integration.

Based on the above technical problems, a new equipment and treatment process is urgently needed to realize the treatment of sulfur-containing polymetallic solid waste.

Contents of the invention

In view of the above problems, the purpose of the present invention is to provide a new smelting furnace for treating sulfur-containing polymetallic solid waste and its treatment method, so as to solve the problems of low economic benefits and easy waste of resources in the existing solid waste treatment methods.

The smelting furnace for treating sulfur-containing polymetallic solid waste provided by the present invention includes a furnace body, and a smelting chamber is formed in the furnace body; the smelting chamber includes an oxidation smelting zone and a reduction smelting zone that communicate with each other; wherein, in the The top of the oxidation smelting zone is provided with a first feeding port for solid waste materials and first auxiliary raw materials, and the top of the reduction smelting zone is provided with a second feeding port for reducing agent and second auxiliary raw materials; and ,

The solid waste material and the first auxiliary raw material are oxidized and smelted into liquid slag in the oxidation smelting zone and flow into the reduction smelting zone, and the metal elements in the liquid slag are in the reduction smelting zone and the The reducing agent and the second auxiliary raw material undergo a reduction reaction and settle at the bottom of the reducing smelting zone.

In addition, the preferred solution is that a first flue gas port is also provided at the top of the oxidation smelting zone; wherein,

The solid waste material is oxidized and smelted into liquid slag in the oxidation smelting zone to generate primary flue gas. After the primary flue gas is discharged through the first flue gas port and waste heat is recovered, the high Concentrated sulfur-containing flue gas is sent to the chemical process for recovery to produce concentrated sulfuric acid.

In addition, the preferred scheme is that a second flue gas port is provided on the top of the reduction smelting zone, and air holes are provided on the second flue gas port; wherein,

The liquid slag generates secondary flue gas during the reduction reaction in the reducing smelting zone, and the secondary flue gas is fully burned in the second flue gas port through the air blown through the air hole Carry out waste heat recovery and desulfurization treatment.

In addition, it is preferred that first supplementary heat nozzles are provided on both sides of the oxidation smelting zone, and second supplementary heat nozzles are provided on both sides of the reduction smelting zone; wherein, the first supplementary heat nozzles and the second supplementary heating nozzle adopt the form of injecting fuel and combustion air to provide supplementary heat for the oxidation smelting zone and the reducing smelting zone respectively.

In addition, it is preferred that both the first supplementary heating nozzle and the second supplementary heating nozzle are submerged below the liquid level of the liquid slag; and,

The installation depth of the second supplementary heat nozzles is greater than the installation depth of the first supplementary heat nozzles, and the number of the second supplementary heat nozzles is less than that of the first supplementary heat nozzles.

In addition, it is preferred that both the first supplementary heating nozzle and the second supplementary heating nozzle are inclined towards the central part of the furnace body; and,

The horizontal angle between the central axis of the first supplemental heating nozzle and the side wall of the furnace body is between 45° and 80°, and the central axis of the second supplementary heating nozzle and the side wall of the furnace body The horizontal angle between them is between 45-90°.

In addition, it is preferred that the blowing direction of the first supplementary heat nozzle is from the oxidation smelting zone to the reduction smelting zone, and the spraying direction of the second supplementary heat nozzle is from the reduction smelting zone to the reduction smelting zone. The above oxidation melting zone.

In addition, the preferred solution is that a sedimentation tank is provided at the bottom of the reduction smelting zone, and the molten metal formed by sedimentation is accommodated in the sedimentation tank, and a metal outlet is provided on the sedimentation tank; and,

A slag outlet is provided at the bottom of both sides of the reduction smelting zone.

On the other hand, the present invention also provides a treatment method for treating sulfur-containing polymetallic solid waste smelting furnace as described above, the treatment method comprising:

The solid waste material fed from the first feeding port is oxidized and smelted into liquid slag in the oxidation smelting zone, and circulates between the oxidation smelting zone and the reduction smelting zone;

The liquid slag undergoes a reduction reaction with the reducing agent raw material in the reduction smelting zone and forms molten metal deposited at the bottom of the reduction smelting zone;

The molten metal deposited at the bottom of the original smelting zone is discharged through the metal outlet after reaching a first predetermined thickness.

In addition, the preferred solution is that the processing method also includes:

After the primary flue gas generated in the oxidation smelting zone is discharged through the first flue gas port and waste heat is recovered, the generated high-concentration sulfur-containing flue gas is then sent to a chemical process for recovery to produce concentrated sulfuric acid; and,

The secondary flue gas produced by the reduction smelting zone is fully burned in the second flue gas port through the air blown in through the air hole, and then undergoes waste heat recovery and desulfurization treatment; and,

The reduced liquid slag in the reduction smelting zone reaches a preset second preset thickness and is discharged through the slag outlet, and then directly undergoes water quenching and quenching treatment, and the resulting water quenched slag is used as an active material for building material production.

Compared with the prior art, the above-mentioned smelting furnace for treating sulfur-containing polymetallic solid waste according to the present invention has the following beneficial effects:

The smelting furnace for treating sulfur-containing polymetallic solid waste and its treatment method provided by the present invention adopts the molten pool smelting method for industrial solid waste, and designs a double-zone oblique submerged combustion smelting furnace, which has high processing efficiency and fast gas output, It has the characteristics of high metal recovery rate and high utilization efficiency of flue gas waste heat. In addition, this furnace type can also synergistically process a variety of solid wastes, exerting the purpose of using waste to treat waste, and has the characteristics of adapting to a wide variety of raw materials; in addition, the smelting furnace for treating sulfur-containing polymetallic solid waste provided by the invention can solve the problem of sulfur-rich solid waste. The resource treatment of a class of industrial solid wastes such as metals and valuable metals can realize the recycling of sulfur and metals in solid wastes, and the tailings can be directly used as building materials; the most important point is that the treatment of sulfur-containing polymetallic The solid waste smelting furnace and its treatment method have the characteristics of high solid waste treatment efficiency, high fuel heat utilization efficiency, low energy consumption per unit of solid waste treatment, high metal recovery rate, and low residual metal content in slag; The horizontal fluidity and vertical agitation are good, and the thermal temperature uniformity of the molten pool is high; the double-zone furnace design also makes the investment lower.

To the accomplishment of the above and related ends, one or more aspects of the invention comprise the features hereinafter described in detail and particularly pointed out in the claims. The following description and accompanying drawings detail certain exemplary aspects of the invention. These aspects are indicative, however, of but a few of the various ways in which the principles of the invention may be employed. Furthermore, the invention is intended to include all such aspects and their equivalents.

Description of drawings

By referring to the following description combined with the accompanying drawings and the contents of the claims, and with a more comprehensive understanding of the present invention, other objectives and results of the present invention will be more clear and easy to understand. In the attached picture:

Fig. 1 is a schematic front view sectional view of a smelting furnace for treating sulfur-containing polymetallic solid waste according to an embodiment of the present invention;

Fig. 2 is a schematic top view of a smelting furnace for treating sulfur-containing polymetallic solid waste according to an embodiment of the present invention.

Reference signs: furnace body 1, oxidation smelting zone 2, reduction smelting zone 3, liquid slag 4, first feeding port 5, first flue gas port 6, partition wall 7, second feeding port 8, second flue gas mouth 9, air hole 10, first supplementary heating nozzle 11, second supplementary heating nozzle 12, deposition tank 13, metal outlet 14, slag outlet 15.

The same reference numerals indicate similar or corresponding features or functions throughout the drawings.

Detailed ways

In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that these embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. construction and operation, and therefore cannot be construed as limiting the present invention; the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be construed as indicating or implying relative importance; in addition, unless otherwise Clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a Electrical connection; it can be directly connected or indirectly connected through an intermediary, and it can 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 invention in specific situations.

The structure of the smelting furnace for treating sulfur-containing polymetallic solid waste provided by the present invention is described in detail below. Fig. 1 shows the front view section structure of the smelting furnace for processing sulfur-containing polymetallic solid waste according to an embodiment of the present invention, and Fig. 2 shows A top view structure of a smelting furnace for treating sulfur-containing polymetallic solid waste according to an embodiment of the present invention.

1 and 2, it can be seen that the smelting furnace for treating sulfur-containing polymetallic solid waste provided by the present invention includes a furnace body 1, and a smelting chamber for smelting solid waste is formed in the furnace body 1 . Specifically, the smelting chamber includes an oxidation smelting zone 2 and a reduction smelting zone 3 which communicate with each other; wherein, the oxidation smelting zone 2 is used to oxidize and melt solid waste materials, and the top of the oxidation smelting zone 2 is provided with solid waste materials, first The first feeding port 5 for auxiliary raw materials is put in; in the reduction smelting zone 3, it is used to reduce the metal in the liquid slag 4 formed after the solid waste is melted, and the top of the reduction smelting zone 3 is provided with a reducing agent and a second auxiliary raw material The second feeding port 8 where raw materials are put in.

In the actual smelting process, the solid waste material and the first auxiliary raw material put in from the first feeding port 5 are oxidized and smelted into the liquid slag 4 in the oxidation smelting zone 2 and flow into the reduction smelting zone 3. The metal elements in the liquid slag 4 are In the reduction smelting zone 3 , the reduction reaction occurs with the raw materials such as the reducing agent and the second auxiliary raw material put in from the second feeding port 8 to form molten metal which settles at the bottom of the reduction smelting zone 3 .

It should be explained in detail that the smelting furnace for treating sulfur-containing polymetallic solid waste provided by the present invention has two smelting zones, and the oxidation smelting zone 2 is mainly used to process various sulfur-containing industrial solid wastes added into the furnace. In the actual use process, after the material is poured into the furnace from the first feeding port 5, the material is rapidly melted under the state of violent combustion and stirring in the molten pool, and the sulfate, sulfide and other substances contained in it will decompose and enter the flue gas In the process, flue gas containing SO2 is formed, which is discharged out of the furnace through the flue gas port of oxidation smelting zone 2 for waste heat recovery and power generation. The remaining high-concentration sulfur-containing flue gas after power generation is directly sent to the chemical acid system to produce concentrated sulfuric acid.

The reduction smelting zone 3 mainly performs deep reduction on the melt from the oxidation smelting zone 2, and the reducing agent and other raw materials are poured into the smelting zone through the second feeding port 8, and the slag will float on the surface of the slag under the action of the slag flow The reducing agent is involved in the slag and undergoes a reduction reaction with metal elements such as Fe, Ni, and Co in the slag. The molten metal formed by the reduction settles at the bottom of the reduction smelting zone 3 because its specific gravity is greater than that of the slag, and is discharged from the metal outlet 14 after forming a metal layer with a certain thickness. After the reduced slag accumulates a certain thickness, it is regularly discharged out of the furnace from the slag outlets 15 on both sides of the reduction smelting zone 3, and is directly water-quenched and sold as an active material to cement or concrete production enterprises.

In addition, in order to realize the discharge of flue gas in the sulfur-containing polymetallic solid waste smelting furnace, a first flue gas port 6 is provided on the top of the oxidation smelting zone 2; wherein, the solid waste material is oxidized and smelted in the oxidation smelting zone 2 into The process of liquid slag 4 produces primary flue gas, and the primary flue gas is discharged through the first flue gas port 6 for waste heat recovery, and the generated high-concentration sulfur-containing flue gas is then sent to the chemical process for recovery to produce concentrated sulfuric acid. A second flue gas port 9 is provided on the top of the reduction smelting zone 3, and an air hole 10 is provided on the second flue gas port 9; wherein, the liquid slag 4 is produced during the reduction reaction in the reduction smelting zone 3. The flue gas and the secondary flue gas are fully burned by the air blown through the air hole 10 in the second flue gas port 9 and then undergo waste heat recovery and desulfurization treatment.

Specifically, after the flue gas produced in the reduction smelting zone 3 is discharged from the second flue gas port 9, air is blown in through the rows of air holes 10 on the flue, and then secondary combustion is carried out to remove the CO and S in the flue gas. , CH4 and other substances are burned into CO2, SO2, H2O, and then sent to the waste heat boiler for power generation, and the remaining tail gas is directly sent to the tail gas desulfurization treatment. In order to prevent the flue gas in the oxidation zone and the reduction zone from mixing, a partition wall 6 is set between the two zones, and cooling water is passed into the partition wall 6 to cool down, so as to protect the high temperature thermal strength of the partition wall 6.

In addition, in order to realize supplementary heat to the smelting zone, first supplementary heat nozzles 11 are provided on both sides of the oxidation smelting zone 2, and second supplementary heat nozzles 12 are provided on both sides of the reduction smelting zone 3; wherein, the first supplementary heat The nozzle 11 and the second supplementary heat nozzle 12 both use the form of injecting fuel and combustion air to supplement heat for the oxidation smelting zone 2 and the reduction smelting zone 3 respectively.

It should be noted that due to the high energy consumption of the melting material, the upper temperature of the molten pool will be lower, and the lower depth of the fuel spray gun will help to achieve rapid heating and melting of the material to achieve the purpose of improving thermal efficiency. Therefore, both the first supplementary heating nozzle 11 and the second supplementary heating nozzle 12 need to be submerged below the liquid level of the liquid slag 4; The installed number of the second supplementary heat nozzles 12 is less than the installed number of the first supplementary heat nozzles 11 . The depth of the second supplementary heating nozzle 12 in the reduction smelting zone 3 is deeper than that of the first supplementary heating nozzle 11 in the oxidation smelting zone 2. On the one hand, it helps to form the flow power of the slag, and on the other hand, it increases the temperature in the middle and lower parts of the molten pool. , to prevent the metal from becoming sticky or even solidified when it cools down, and it also helps to increase the temperature of the melt near the slag discharge port and iron discharge port, which is convenient for slag discharge and iron tapping.

Of course, in order to enhance the effect of supplementary heat on the smelting zone, both the first supplementary heat nozzle 11 and the second supplementary heat nozzle 12 are inclined towards the central part of the furnace body 1; The horizontal angle between the side walls of the furnace body 1 is between 45-80°, and the horizontal angle between the central axis of the second supplementary heating nozzle 12 and the side wall of the furnace body 1 is between 45-90°.

It should be noted that the blowing direction of the first supplementary heat nozzle 11 is from the oxidation smelting zone 2 to the reduction smelting zone 3 , and the spraying direction of the second supplementary heat nozzle 12 is from the reduction smelting zone 3 to the oxidation smelting zone 2 . The two zones are set in different injection directions at different depths, which helps to form a horizontal flow effect inside the melt. Among them, the slag located in the upper part of the oxidation smelting zone 2 flows from the upper part of the oxidation smelting zone 2 to the upper part of the reduction smelting zone 3 under the action of the spray gun, and descends to the lower part of the reduction smelting zone 3 under the action of the nozzle of the reduction smelting zone 3, and then flows from the reduction smelting zone 3 to the lower part of the reduction smelting zone 3. The lower part of zone 3 flows into the lower part of oxidation smelting zone 2, thereby forming an annular flow field on the longitudinal plane of the smelting furnace.

In addition, the spray gun (including the first supplementary heating nozzle 11 and the second supplementary heating nozzle 12 ) is set in a dual-channel mode, which can inject fuel and combustion-supporting gas at the same time. The injected fuel can be pulverized coal, natural gas or fuel oil, etc. The combustion-supporting gas is oxygen-enriched air with an oxygen concentration between 40-70%. The reduced slag is homogenized in the rear area of the fuel injection gun, the residual metal content in the slag is small, and the heat of the melt is high.

In addition, in order to realize the collection of molten metal, a sedimentation tank 13 is provided at the bottom of the reduction smelting zone 3, and the molten metal formed by sedimentation is stored in the sedimentation tank 13, and a metal outlet 14 is provided on the sedimentation tank 13 to facilitate the discharge of the molten metal; Moreover, slag outlets 15 are provided at the bottoms of both sides of the reduction smelting zone 3 to facilitate the discharge of the final liquid slag.

In addition, in order to describe in detail the working principle of the smelting furnace for treating sulfur-containing polymetallic solid waste provided by the present invention, the present invention also provides a treatment method for treating sulfur-containing polymetallic solid waste smelting furnace as described above. The processing method includes:

The solid waste material fed from the first charging port 5 is oxidized and smelted into liquid slag 4 in the oxidation smelting zone 2, and circulates between the oxidation smelting zone 2 and the reduction smelting zone 3;

The molten slag 4 undergoes a reduction reaction with the reducing agent raw material in the reduction smelting zone 3 to form molten metal deposited at the bottom of the reduction smelting zone 3;

The molten metal deposited at the bottom of the original smelting zone is discharged through the metal outlet 14 after reaching a first predetermined thickness.

Further, in order to realize the treatment of flue gas, the treatment method also includes:

The primary flue gas produced in the oxidation smelting zone 2 is discharged through the first flue gas port 6 and subjected to waste heat recovery and desulfurization treatment; and,

The secondary flue gas produced by the reduction smelting zone 3 is fully burned by the air blown in through the air hole 10 in the second flue gas port 9, and then the waste heat recovery and desulfurization treatment are carried out; and,

The liquid slag 4 reduced in the reduction smelting zone 3 is discharged through the slag outlet 15 after reaching a preset second preset thickness.

It can be seen from the above specific implementation methods that the smelting furnace for treating sulfur-containing polymetallic solid waste and its treatment method proposed by the present invention have the following advantages:

1. Adopt double smelting zone design, raw materials such as solid waste cold material and external auxiliary materials are added from the oxidation smelting zone, the oxidation smelting zone maintains a slightly oxygen-enriched state, and the oxygen concentration in the flue gas is controlled at 3-8%.

2. The reduction smelting zone is used to reduce the metal in the slag, the reducing agent is added into the furnace from the reduction smelting zone, the oxygen concentration in the flue gas is lower than 3%, and the CO concentration is between 5-16%;

3. An internal water-cooled partition wall is installed in the middle of the two smelting areas to block the gas mixture in the two areas. The bottom surface of the partition wall is slightly higher than the design liquid level of the melting pool to prevent the partition wall from being damaged by slag erosion.

4. The oblique injection combustion method is adopted, and the immersion depths of the spray guns in the two areas are different; the horizontal injection direction of the spray guns in the two areas adopts the opposite injection method; the number of spray guns in the oxidation smelting area is slightly higher than that in the reduction smelting area; The bottom of the molten pool in the reduction smelting zone is slightly lower than the bottom of the molten pool in the oxidation smelting zone, which helps to collect the reduced liquid metal.

5. It can handle a variety of industrial solid wastes containing sulfur and metals, with wide adaptability of raw materials.

6. Realize the utilization of all components of solid waste. Not only the sulfur and valuable metals in the solid waste can be recovered for the manufacture of sulfuric acid and metals, but the obtained water-quenched slag is also different from the original solid waste in terms of physical and chemical properties, with high potential hydration activity, and can be directly used in cement and Concrete production, the market volume is huge.

The smelting furnace for treating sulfur-containing polymetallic solid waste and its use method according to the present invention are described by way of example with reference to FIG. 1 and FIG. 2 . However, those skilled in the art should understand that various improvements can be made without departing from the content of the present invention to the smelting furnace for treating sulfur-containing polymetallic solid waste and its use method proposed in the present invention. Therefore, the protection scope of the present invention should be determined by the contents of the appended claims.

Claims (10)

1. A sulfur-containing multi-metal solid waste smelting furnace, comprising a furnace body in which a smelting chamber is formed; it is characterized in that the smelting chamber includes an oxidation smelting zone and a reduction smelting zone connected to each other; wherein, The top of the oxidation smelting zone is provided with a first feeding port for solid waste materials and first auxiliary raw materials, and the top of the reduction smelting zone is provided with a second feeding port for reducing agent and second auxiliary raw materials. ;and, The solid waste material and the first auxiliary raw material are oxidized and smelted into liquid slag in the oxidation smelting zone and flow into the reduction smelting zone, and the metal elements in the liquid slag are in the reduction smelting zone and the The reducing agent and the second auxiliary raw material undergo a reduction reaction and settle at the bottom of the reducing smelting zone. 2. The sulfur-containing polymetallic solid waste smelting furnace as claimed in claim 1, characterized in that, A first flue gas port is also provided at the top of the oxidation smelting zone; wherein, The solid waste material is oxidized and smelted into liquid slag in the oxidation smelting zone to generate primary flue gas. After the primary flue gas is discharged through the first flue gas port and waste heat is recovered, the high Concentrated sulfur-containing flue gas is sent to the chemical process to produce concentrated sulfuric acid. 3. The sulfur-containing polymetallic solid waste smelting furnace as claimed in claim 2, characterized in that, A second flue gas port is provided on the top of the reduction smelting zone, and air holes are provided on the second flue gas port; wherein, The liquid slag generates secondary flue gas during the reduction reaction in the reducing smelting zone, and the secondary flue gas is fully burned in the second flue gas port through the air blown through the air hole Carry out waste heat recovery and desulfurization treatment. 4. The sulfur-containing polymetallic solid waste smelting furnace as claimed in claim 3, characterized in that, First supplementary heat nozzles are arranged on both sides of the oxidation smelting zone, and second supplementary heat nozzles are provided on both sides of the reduction smelting zone; wherein, the first supplementary heat nozzle and the second supplementary heat nozzle The nozzles are used to inject fuel and combustion air to supplement heat for the oxidation smelting zone and the reducing smelting zone respectively. 5. The sulfur-containing polymetallic solid waste smelting furnace as claimed in claim 4, characterized in that, Both the first supplemental heating nozzle and the second supplemental heating nozzle are submerged below the liquid level of the liquid slag; and, The installation depth of the second supplementary heat nozzles is greater than the installation depth of the first supplementary heat nozzles, and the number of the second supplementary heat nozzles is less than that of the first supplementary heat nozzles. 6. The sulfur-containing polymetallic solid waste smelting furnace as claimed in claim 5, characterized in that, Both the first supplemental heating nozzle and the second supplemental heating nozzle are inclined toward a central portion of the furnace body; and, The horizontal angle between the central axis of the first supplemental heating nozzle and the side wall of the furnace body is between 45° and 80°, and the central axis of the second supplementary heating nozzle and the side wall of the furnace body The horizontal angle between them is between 45-90°. 7. The sulfur-containing polymetallic solid waste smelting furnace according to claim 6, characterized in that, The blowing direction of the first supplementary heat nozzle is from the oxidation smelting zone to the reduction smelting zone, and the spraying direction of the second supplementary heat nozzle is from the reduction smelting zone to the oxidation smelting zone. 8. The sulfur-containing polymetallic solid waste smelting furnace according to any one of claims 1 to 7, characterized in that, A sedimentation tank is provided at the bottom of the reduction smelting zone, and the molten metal formed by sedimentation is accommodated in the sedimentation tank, and a metal outlet is provided on the sedimentation tank; and, A slag outlet is provided at the bottom of both sides of the reduction smelting zone. 9. A method for smelting and treating sulfur-containing polymetallic solid waste, characterized in that the smelting treatment of sulfur-containing polymetallic solid waste is carried out by using the smelting of sulfur-containing polymetallic solid waste according to any one of claims 1 to 8, The methods include: The solid waste material fed from the first feeding port is oxidized and smelted into liquid slag in the oxidation smelting zone, and circulates between the oxidation smelting zone and the reduction smelting zone; The liquid slag undergoes a reduction reaction with the reducing agent raw material in the reduction smelting zone to form molten metal deposited at the bottom of the reduction smelting zone; The molten metal deposited at the bottom of the original smelting zone is discharged through the metal outlet after reaching a first predetermined thickness. 10. The method for smelting and treating sulfur-containing polymetallic solid waste according to claim 9, characterized in that the method further comprises: After the primary flue gas produced in the oxidation smelting zone is discharged through the first flue gas port and waste heat is recovered, the generated high-concentration sulfur-containing flue gas is sent to a chemical process to produce concentrated sulfuric acid; and, The secondary flue gas produced by the reduction smelting zone is fully burned in the second flue gas port through the air blown in through the air hole, and then undergoes waste heat recovery and desulfurization treatment; and, The reduced liquid slag in the reduction smelting zone reaches the preset second preset thickness and is discharged through the slag outlet, and then directly undergoes water quenching and quenching treatment, and the resulting water quenching slag is used as an active raw material for building materials Production.

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