CN202576523U - Energy-saving and environment-friendly smelting furnace - Google Patents

Abstract

The utility model discloses an energy-saving and environment-friendly smelting furnace, which belongs to the field of lead recovery equipment. The smelting furnace includes: a heat supply melting system, a feeding system, a material discharge system, and a waste gas and smoke dust collection system; wherein, the heat supply and melting system includes support, A smelting chamber, a heating device and a lead melting pot; the feeding system is composed of a feeding bin rail and a feeding bin slidingly arranged on the feeding bin rail; the discharging system is arranged below the outlet of the melting chamber of the heating melting system, and Corresponding to the discharge port; the waste gas and dust collection system includes an upper dust removal chamber and a lower dust removal chamber; the upper dust removal chamber is set above the melting chamber of the heating melting system and communicated with the feeding system, and the upper dust removal chamber is connected to the waste gas collection pipe through a pipeline Connected; the lower dust removal chamber is set under the smelting chamber of the heating melting system, and communicates with the discharge system, and the lower dust removal chamber is connected with the exhaust gas collection pipe through the pipeline. The smelting furnace has the advantages of simple structure, energy saving and environmental protection performance.

Description

Energy-saving and environment-friendly melting furnace

technical field

The utility model relates to the field of lead smelting equipment, in particular to an energy-saving and environment-friendly melting furnace for melting lead paste, lead mud, waste lead grids and lead parts in the waste lead-acid battery recycling industry.

Background technique

At present, there are 186 renewable lead enterprises in my country that can be counted, with a large number, small scale, extremely simple equipment, high energy consumption and serious pollution emissions. In 2011, 80% of them were shut down by the environmental storm. Statistical data show that my country's renewable lead output was 135 tons in 2010, and reached 1.4 million tons in 2011, accounting for about one-third of the total output of metallic lead. The recovery rate of lead-acid batteries is as high as 96.5%, ranking first among recycled items. Secondary lead production in the United States accounts for 58% of total lead production, 64% in Japan, 62% in Germany, 93% in Italy, and 98% in France. my country's secondary lead industry needs to accelerate development. The key link that restricts the development is the equipment problem, one of the main bottlenecks is the backward technology of the secondary lead smelting furnace and the poor equipment. Lead to large energy consumption and serious pollution emissions.

At present, the vast majority of my country uses tunnel reactors, while developed countries such as Europe and the United States use rotary kilns. Therefore, the energy consumption of most recycled lead plants in my country is 500-600kg (standard coal)/T, while the energy consumption of recycled lead plants in developed countries in Europe and the United States is 150-200kg (standard coal)/T. The disadvantage of the tunnel reverberatory furnace is that the thermal efficiency is very low, and about 60-80% of the energy is lost from the ground and other heat dissipation. Basically, the material is manually fed on the side of the furnace body, and then the lead liquid and slag are manually released on the other side of the furnace body. One end of the furnace burns and the other end exhausts the exhaust gas, and the temperature of the exhaust gas at the other end is as high as 1000-1200 °C. Such tunnel reactors have seriously affected the output, efficiency, environmental protection and occupational hygiene of secondary lead smelting. However, the rotary kilns popularized and applied in developed countries in Europe and the United States have been verified by many domestic large-scale recycled lead factories, and at least have the following shortcomings: ① Lead slag cannot be completely separated, and the lead content in the slag is as high as 6% to 8%. ②The density of lead is high, the rotary kiln has extremely high requirements on the load-bearing support, the equipment and materials are expensive, the investment is large, and the production capacity is not high. Therefore, domestic large-scale secondary lead enterprises use imported rotary kilns to face economic problems such as poor input and output and environmental problems such as high lead content in slag.

Although there are patents for environmental protection and energy-saving smelting furnaces in China, there are at least the following problems:

①The feeding port is set at the upper end, and the upper end is used to feed and seal. Although the problem of feeding mechanization is solved, there are hidden dangers in production; accidents of lead liquid explosion and upward rushing are prone to occur during feeding.

②After the horizontal short kiln is changed to a vertical kiln, the furnace body is still in close contact with the ground. Although there is no serious problem of heat dissipation caused by the tunnel reverberatory furnace being in contact with the ground in a large area, the problem of heat dissipation through the ground is still relatively obvious, and the problem of energy consumption is not. solve it completely.

Utility model content

The embodiment of the utility model provides an energy-saving and environment-friendly smelting furnace, which can automatically feed materials and automatically discharge lead liquid, is safe, energy-saving, environmentally friendly, has high production capacity, high lead recovery rate, and low lead content in slag, thereby solving the problem of the current smelting furnace The safety is not high and the environmental performance is not good.

For solving the problems referred to above, the technical scheme provided by the utility model is as follows:

The embodiment of the utility model provides an energy-saving and environment-friendly melting furnace, including:

Heat supply melting system, feeding system, discharging system and waste gas and dust collection system; among them,

The heat supply and melting system includes a support, a melting chamber, a heating device and a lead melting pot; wherein the melting chamber is arranged on the support, the bottom is suspended, and the outside of the wall of the melting chamber is provided with an insulating wall and an insulating layer in sequence, and the upper end of the melting chamber is provided with a There is a feeding port, the lower end is provided with a discharge port, and a waste gas collection pipe is provided on the side wall of the smelting chamber; the heating device is installed in the smelting chamber; The collection pipeline is connected;

The feeding system is composed of a feeding bin rail and a feeding bin slidingly arranged on the feeding bin rail; wherein the feeding bin rail is arranged above the feeding port of the melting chamber of the heating melting system, and the feeding bin and the melting chamber Corresponding to the port, the lower part of the feeding bin is equipped with a propeller propeller, and a preheating device is installed in the feeding bin, and the preheating device is connected to the exhaust gas collection pipeline through the exhaust gas waste heat recovery secondary pipeline;

The discharge system is arranged below the discharge port of the smelting chamber of the heating melting system, corresponding to the discharge port;

The exhaust gas and dust collection system includes an upper dust removal chamber and a lower dust removal chamber; wherein, the upper dust removal chamber is arranged above the smelting chamber of the heating melting system and communicates with the feeding system, and the upper dust removal chamber communicates with the exhaust gas collection pipe through pipes; The lower dedusting chamber is arranged under the smelting chamber of the heat supply melting system and communicated with the discharge system, and the lower dedusting chamber is communicated with the exhaust gas collection pipe through the pipeline.

It can be seen from the technical solutions provided above that in the smelting furnace provided by the embodiment of the utility model, automatic mechanical feeding at the upper end can be realized through the feeding system, and the feeding port can be automatically started and closed, which solves the current needs of most enterprises in the secondary lead industry. The problem of manual feeding on the side greatly reduces the labor intensity of the operators, improves occupational health conditions, protects the environment, and improves productivity, and can accurately measure ingredients to ensure the quality of each batch of products; above the melting furnace A preheating device is installed in the feeding bin to preheat and dehydrate the water-containing ingredients such as lead paste and lead mud, which can effectively prevent the subsequent water-containing lead paste and lead mud from being added to the lead liquid from the upper feeding port to cause an explosion, which solves the current problem. The secondary lead industry adopts the explosion problem caused by the upper-end feeding, which ensures safe production; in addition, the bracket support makes the furnace body suspended, so that the melting chamber does not directly contact the ground, which not only solves the large-area contact of most tunnel reactors in the domestic secondary lead industry The problem of heat dissipation and energy loss on the ground also solves the problem of local heat dissipation and energy loss in the small area of the domestic patent shaft kiln that touches the ground, so that the energy-saving effect can be achieved to the best.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention , for those skilled in the art, other drawings can also be obtained based on these drawings without creative work.

Fig. 1 is the smelting furnace structure schematic diagram that the utility model embodiment provides;

Fig. 2 is the processing flow chart of the smelting furnace that the utility model embodiment provides;

The names of the parts corresponding to the labels in Figure 1 are: 1-insulation wall; 2-insulation layer; 3-wall; 4-combustion chamber; 5-smelting chamber; 6-feeding bin; Discharging track; 9-lower dust removal chamber; 10-feeding port; 11-discharging port; 12-discharging pot; 13-combustion chamber inspection port; 14-dust removal switch; 15-exhaust gas collection pipe; Secondary pipeline; 17-lead melting pot; 18-exhaust gas waste heat recovery main pipe; 19-lead melting pot dust removal room; 20-feeding bin track.

Detailed ways

The technical solutions in the utility model will be clearly and completely described below in conjunction with specific embodiments. Apparently, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present utility model.

The embodiments of the present invention will be further described in detail below.

The embodiment of the utility model provides an energy-saving and environment-friendly melting furnace, which belongs to the equipment used in the lead regeneration industry. As shown in Figure 1, the melting furnace includes: a heating melting system, a feeding system, a discharging system, and a waste gas and smoke collection system;

Among them, the heat supply melting system includes: bracket, melting chamber, heating device and lead melting pot; in the heat supply melting system, the melting chamber is set on the support, the bottom is suspended, and the outside of the wall of the melting chamber is successively provided with insulation wall and insulation layer , the upper end of the smelting chamber is provided with a feed port, the lower end is provided with a discharge port, and the side wall of the smelting chamber is provided with a waste gas collection pipe; the heating device is installed in the smelting chamber; Use the main pipeline to communicate with the exhaust gas collection pipeline;

The feeding system is composed of a feeding bin rail and a feeding bin slidingly arranged on the feeding bin rail; wherein the feeding bin rail is arranged above the feeding port of the melting chamber of the heating melting system, and the feeding bin corresponds to the feeding port of the melting chamber , the lower part of the feeding bin is provided with a propeller propeller, and a preheating device is installed in the feeding bin, and the preheating device is connected with the exhaust gas collection pipe through the exhaust gas waste heat recovery secondary pipeline;

The discharge system is arranged below the discharge port of the smelting chamber of the heating melting system, corresponding to the discharge port;

The waste gas and dust collection system includes an upper dust removal chamber and a lower dust removal chamber; the upper dust removal chamber is set above the melting chamber of the heating melting system and communicates with the feeding system, and the upper dust removal chamber is connected with the waste gas collection pipe through a pipeline; Below the smelting chamber of the heating melting system, it is connected with the discharge system, and the lower dust removal chamber is connected with the exhaust gas collection pipe through the pipeline.

The heating device of the heat supply melting system of the above-mentioned smelting furnace is a combustion chamber, which is arranged on one side of the smelting chamber. The combustion chamber inspection port can be arranged on the combustion chamber to facilitate the detection of the situation in the combustion chamber.

Alternatively, the heating device can also use fuel injection nozzles or gas injection nozzles arranged on the wall of the smelting chamber to heat the smelting chamber by means of oil or air injection.

The smelting chamber of the above heating melting system is a cylindrical, hemispherical or polygonal chamber structure.

The inlet of the smelting chamber of the heat supply melting system is provided with a sealing plate that can be automatically closed, and the outlet is provided with a sealing device for moving the lead liquid.

A stirring device is provided in the smelting chamber and/or the lead melting pot of the above-mentioned heating melting system.

The upper end of the smelting chamber of the heating melting system is provided with two feeding ports.

Dust removal switches are arranged in the pipes connecting the upper dust removal chamber, the lower dust removal chamber and the waste gas collection pipe.

The above-mentioned discharge system is composed of a discharge track and a discharge pot, wherein the discharge track is arranged below the discharge port of the melting chamber of the heating melting system, and the discharge pot is slidably arranged on the discharge track, and the discharge The inlet of the feeding pot corresponds to the outlet of the melting chamber of the heating melting system.

The support of the above heating melting system is a cast iron support or a steel support.

The waste gas and dust collection system also includes: a lead melting dust removal room, which is arranged at the lead melting pot and communicated with the lead melting pot, and the lead melting dust removal room is connected with the waste gas collection pipe through pipes.

The heating and melting system mentioned above may also include:

The second lead-melting pot is arranged on one side of the smelting chamber, and communicates with the waste gas collection pipe through the second waste gas waste heat recycling main pipe;

and / or

The third lead melting pot is arranged on one side of the smelting chamber, and communicates with the waste gas collection pipe through the third waste gas waste heat recycling main pipe.

Below in conjunction with accompanying drawing and embodiment the above-mentioned smelting furnace is described further in detail.

Embodiment one

The smelting furnace of the embodiment of the utility model mainly includes: thermal insulation wall 1, thermal insulation layer 2, wall 3, combustion chamber 4, melting chamber 5, feeding bin 6, upper dedusting chamber 7, feeding track 8, lower dedusting chamber 9 , feed port 10, discharge port 11, discharge pot 12, combustion chamber inspection port 13, dust removal switch 14, waste gas collection pipe 15, waste gas waste heat recovery secondary pipe 16, lead melting pot 17, waste gas waste heat recovery large pipe 18 , lead melting pot dedusting room 19 and feeding bin rail 20 and other components; mainly divided into heating and melting system, feeding system, discharging system, exhaust gas and smoke dust collection system;

Wherein the heating melting system comprises a support, a combustion chamber 4, a melting chamber 5 and a lead melting pot, the combustion chamber 4 is arranged on one side of the melting chamber 5, the combustion chamber 4 is provided with a combustion chamber inspection port 13, and the wall of the melting chamber 5 3. The outer side is provided with an insulating wall 1 and an insulating layer 2. The upper end of the smelting chamber 5 is provided with two feed ports 10, and the lower end is provided with a discharge port 11. The side of the smelting chamber 5 is provided with a waste gas collection pipe 15. The smelting chamber 5 is set on a support Above, the entire smelting chamber 5 is suspended from the ground, and the brackets can be cast iron brackets or steel brackets;

The combustion chamber of the above-mentioned heating melting system can adopt energy-saving direct gas injection or fuel injection combustion, and the fuel can be natural gas, coal gas, diesel oil, heavy oil, etc., wherein the gas can be replaced by a gas generator to directly burn coal.

The feeding system is composed of a feeding bin track and a feeding bin. The feeding bin is located above the melting chamber. The feeding bin can move left and right on the feeding bin rail hoisted above the melting chamber. The lower part of the feeding bin is equipped with a propeller pusher, which can Feed into the smelting chamber; there is a preheating device in the feeding bin, which is connected to the waste gas collection pipe through the waste gas waste heat recovery secondary pipe, and uses part of the waste heat of the waste gas in the smelting chamber to heat and dehumidify the lead paste and lead mud in the feeding bin to reduce The water content in lead paste, lead slime, etc., eliminates the possibility of explosion caused by subsequent addition of lead paste and lead slime to the lead liquid in the smelting chamber.

The feeding port of the smelting chamber adopts automatic mechanical feeding. After the materials such as lead paste and lead mud are added to the feeding bin by driving, after preheating and dehumidification, the materials such as lead paste and lead mud enter from the two feeding ports under the push of double propellers. In the smelting chamber, the sealing plate set at the feed inlet of the smelting chamber is automatically closed after the feeding is completed.

The above-mentioned discharge system is composed of a discharge track and a discharge pot, wherein the discharge track is arranged below the discharge port of the melting chamber of the heating melting system, and the discharge pot is slidably arranged on the discharge track, and the discharge The inlet of the feeding pot corresponds to the outlet of the melting chamber of the heating melting system. The discharge port of the smelting chamber of the above-mentioned heat supply melting system can be a device that can be opened and closed to control the sealing of the lead liquid at the bottom of the melting chamber, or a device that can be opened and closed and has a heat preservation function is set at the bottom of the smelting chamber. lead liquid discharge pipe. This discharging system can solve the problem that the current smelting furnaces can only use lead pumps or manually pour the lead liquid, the lead pump is inconvenient to operate and difficult to maintain, and it is difficult to realize the problem of automatic lead liquid discharge.

The waste and dust collection system is composed of an upper dust removal chamber 7 and a lower dust removal chamber 9. The upper dust removal chamber 7 is arranged above the smelting chamber 5 of the heating melting system and communicates with the feeding system. The upper dust removal chamber 7 communicates with the waste gas collection pipe through a pipeline; The lower dedusting chamber is arranged under the smelting chamber 5 of the heat supply melting system, and communicates with the discharge system, and the lower dedusting chamber communicates with the waste gas collection pipe through the pipeline.

The upper dust removal chamber 7 can collect negative pressure such as lead dust in the feeding system, and the lower dust removal chamber 9 can collect negative pressure such as lead vapor, lead fume, and SO2 gas in the discharge system, and the waste gas with high temperature in the melting chamber can be used for waste heat One part can be reused in the feeding bin to dry the materials such as lead paste and lead mud, so as to prevent the occurrence of explosion accidents when feeding at the upper end; the other part is merged with the lead dust, lead smoke and lead vapor of the upper dust removal room and the lower dust removal room to another furnace body (such as the lead melting pot 17) for waste heat utilization, can play the best energy-saving effect. The upper dust removal chamber and the lower dust removal chamber are only enabled during feeding and discharging, and the dust removal switch 14 is installed and can be controlled freely. The temperature of the mixed gas entering the exhaust gas and dust collection channel is as high as 1000-1200°C, which can completely make the temperature of another furnace body such as a melting pot reach 400-600°C, so that the waste lead grid and waste lead in another lead melting pot The parts can be completely melted and the preparation of common lead-acid battery grid alloys can be completed, so as to use the waste heat of the waste gas from smelting lead paste and lead sludge to directly melt the lead grids and lead parts sorted from the crushing and sorting machine, which can be fully utilized Beneficial elements such as antimony, tin, copper, etc. in waste grids can be directly formulated into lead-antimony multi-element alloy grids for ordinary lead-acid batteries through appropriate adjustment of alloying elements such as antimony, tin, copper, and arsenic according to the requirements of different manufacturers. It solves the problem of insufficient waste heat utilization of exhaust gas in the current smelting furnace, too single use of waste heat, such as preheating for the other two materials, and limited energy saving.

The waste gas and dust collection system also includes: a lead melting dust removal chamber 19, which is arranged at the lead melting pot 17 and communicated with the lead melting pot. The lead melting dust removal chamber 19 communicates with the waste gas collection pipe through pipes. The lead melting pot can be dedusted and the waste heat can be collected for reuse.

The flow process of recycling lead by using the smelting furnace provided by the embodiment of the present invention is shown in FIG. 2 .

In summary, the smelting furnace provided by the embodiment of the utility model can automatically feed materials and automatically discharge lead liquid, which is safe, energy-saving, environmentally friendly, high production capacity, high lead recovery rate, and low lead content in slag. It is an energy-saving and environment-friendly smelting furnace. The furnace has at least the following beneficial effects:

1) It can realize automatic mechanical feeding at the upper end, and the feeding port can be automatically started and closed, which solves the problem that most enterprises in the recycled lead industry need to manually feed materials on the side of the furnace body, greatly reduces the labor intensity of operators, and improves occupational hygiene conditions. The environment is protected, the productivity is improved, and the ingredients can be accurately measured to ensure the quality of each batch of products.

2) A preheating device is installed in the feeding bin at the upper end of the melting furnace to preheat and dehydrate the water-containing ingredients such as lead paste and lead slime, which can effectively prevent subsequent materials such as water-containing lead paste and lead mud from being added to the lead liquid from the upper feeding port It causes an explosion, which solves the explosion problem caused by the upper-end feeding in the current secondary lead industry, and ensures safe production.

3) The cast iron bracket or steel bracket is used to suspend the furnace body of the melting furnace, so that the melting chamber does not directly contact the ground, which not only solves the problem of heat loss and energy loss in the vast majority of tunnel reactors in the domestic secondary lead industry that contact the ground in large areas, It also solves the problem of local heat dissipation and energy loss in the small area of the domestic patented shaft kiln that touches the ground, so that the energy-saving effect can be optimized.

4) Jet fuel injection and direct combustion can be used to heat the smelting chamber, with high heating efficiency and better separation of slag and lead at the same time, so that the lead content in slag is less than 1.4%, which is far superior to foreign rotary kilns and foreign rotary kilns. The lead content in pit slag is 6-8%. The smelting slag in the utility model does not need to be smelted again, and can be directly landfilled or sent to the cement plant for waste utilization

5) A new type of small furnace is adopted, and the amount of lead melted in each furnace is generally 5-15 tons. However, the existing patented technology in China is a vertical pit, and the amount of lead melted in each furnace is generally 15-30 tons. 20-35 tons (stirring). Foreign rotary kilns rely on their own rotation and stirring, and it takes 6 hours to smelt each batch of lead paste and lead slime. Domestic alumni patented technology vertical cellars require mechanical stirring, and each furnace of lead paste and lead slime takes 12 hours to smelt; It becomes a smoke and dust volatilization sample, and the loss is large. However, the new small furnace of the utility model does not need a stirring device, and the operation is simple. The melting time of each furnace of lead paste and lead slime is only 5 to 6 hours, and the melting time is equivalent to that of the developed international rotary kiln, which is shorter than the melting time of the existing domestic patent technology. Half of the production efficiency has been improved, and material consumption and energy consumption have been reduced.

6) By moving the opening and closing of the lead liquid discharge cellar sealing equipment, it can effectively collect and process lead smoke, lead vapor, and SO ₂ under negative pressure conditions, reducing labor or using lead pumps to discharge lead liquid, easy to operate, and cast lead Package production efficiency increased.

7) Utilize the waste heat of high temperature (temperature up to 1000-1200°C) in two ways, a small part of high-temperature exhaust gas is used in the feeding bin to dehydrate the wet materials such as lead paste and lead mud containing water, and then add to the melting furnace to prevent feeding at the upper end In addition, most of the high-temperature exhaust gas is used to heat another furnace body such as a lead melting pot, so that the heating temperature in the lead melting pot reaches 400-600°C, not only can directly melt waste lead grids and lead parts, but also can The composition requirements of acid battery manufacturers are to directly prepare lead-antimony multi-element alloys for ordinary lead-acid battery grids by adding alloy elements such as antimony, tin, copper, and uranium. The utility model makes the use of waste heat more reasonable and sufficient, and achieves the best energy-saving effect.

9) By suspending the furnace body, the waste heat is more rationally utilized, so that the energy consumption of secondary lead smelting is 150-170Kg (standard coal)/T, reaching the same level as the rotary kiln energy consumption of 150-200Kg (standard coal)/T in developed countries, only The energy consumption of traditional domestic tunnel reactors is about 30% of that of 500-600Kg (standard coal)/T, and the energy saving is remarkable.

10) The investment of the energy-saving and environment-friendly compound suspended smelting furnace of the embodiment of the utility model is only equivalent to 1/10 of the investment of foreign rotary kilns, and the construction period is short, and the occupied area is only 1/4 of that of foreign rotary kilns and domestic tunnel reverberatory furnaces. Significant economic benefits.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto, and any person familiar with the technical field can easily think of All changes or replacements should fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (10)

1. An energy-saving and environment-friendly smelting furnace is characterized by comprising:

the system comprises a heat supply melting system, a feeding system, a discharging system and a waste gas and smoke dust collecting system; wherein,

the heat supply melting system comprises a support, a melting chamber, a heating device and a lead melting pot; the smelting chamber is arranged on the bracket, the bottom of the smelting chamber is suspended, a heat-insulating wall and a heat-insulating layer are sequentially arranged outside the wall of the smelting chamber, a charging opening is formed in the upper end of the smelting chamber, a discharging opening is formed in the lower end of the smelting chamber, and a waste gas collecting pipeline is arranged on the side wall of the smelting chamber; the heating device is arranged in the smelting chamber; the lead melting pot is arranged on one side of the smelting chamber and is communicated with the waste gas collecting pipeline through a waste gas waste heat recycling main pipeline;

the feeding system consists of a feeding bin track and a feeding bin which is arranged on the feeding bin track in a sliding manner, wherein the feeding bin track is arranged above a feeding opening of a smelting chamber of the heat supply melting system, the feeding bin corresponds to the feeding opening of the smelting chamber, a propeller pusher is arranged at the lower part of the feeding bin, a preheating device is arranged in the feeding bin, and the preheating device is communicated with a waste gas collecting pipeline through a waste gas waste heat recycling secondary pipeline;

the discharging system is arranged below a discharging port of a smelting chamber of the heat supply melting system and corresponds to the discharging port;

the waste gas and smoke dust collecting system comprises an upper dust chamber and a lower dust chamber; the upper dust removing chamber is arranged above the smelting chamber of the heat supply melting system and is communicated with the feeding system, and the upper dust removing chamber is communicated with the waste gas collecting pipeline through a pipeline; the lower dust removal chamber is arranged below the smelting chamber of the heat supply melting system and communicated with the discharging system, and the lower dust removal chamber is communicated with the waste gas collecting pipeline through a pipeline.

2. The smelting furnace according to claim 1, characterized by the heating means of the heating and melting system being a combustion chamber, arranged on one side inside the smelting chamber;

or

The heating device is a fuel spray nozzle or a fuel spray nozzle arranged on the inner wall of the smelting chamber.

3. The smelting furnace according to claim 1, characterized by the smelting chamber of the hot-melt system being a cylindrical, hemispherical or polygonal chamber structure.

4. The smelting furnace according to claim 1, characterized in that stirring means are provided in the smelting chamber and/or the lead pot of the hot-melt system.

5. The smelting furnace of claim 1, wherein the upper end of the smelting chamber of the hot-melt system is provided with two charging ports.

6. The smelting furnace according to claim 1, wherein dust removal switches are provided in the conduits connecting the upper and lower dust removal chambers and the off-gas collection conduit.

7. The smelting furnace according to claim 1, wherein the tapping system is comprised of a tapping track and a tapping pot, wherein the tapping track is arranged below a tapping opening of the smelting chamber of the thermal melting system, the tapping pot is slidingly arranged on the tapping track, and an inlet of the tapping pot corresponds to the tapping opening of the smelting chamber of the thermal melting system.

8. The smelting furnace according to claim 1, characterized by the brackets of the heating and melting system being cast iron brackets or steel brackets.

9. The smelting furnace of claim 1, wherein the off-gas and flue dust collection system further comprises: and the lead melting dust removal chamber is arranged at the lead melting pot and communicated with the lead melting pot, and the lead melting dust removal chamber is communicated with the waste gas collecting pipeline through a pipeline.

10. The smelting furnace of claim 1, wherein the heating and melting system further comprises:

the second lead melting pot is arranged on one side of the smelting chamber and is communicated with the waste gas collecting pipeline through a second waste gas waste heat recycling main pipeline;

and/or

And the third lead melting pot is arranged on one side of the smelting chamber and is communicated with the waste gas collecting pipeline through a third waste gas waste heat recycling main pipeline.

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