CN210765454U - Regenerative lead multi-chamber smelting heat accumulating type energy-saving furnace device - Google Patents
Regenerative lead multi-chamber smelting heat accumulating type energy-saving furnace device Download PDFInfo
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- CN210765454U CN210765454U CN201921876313.8U CN201921876313U CN210765454U CN 210765454 U CN210765454 U CN 210765454U CN 201921876313 U CN201921876313 U CN 201921876313U CN 210765454 U CN210765454 U CN 210765454U
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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- Y02P10/20—Recycling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/84—Recycling of batteries or fuel cells
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Abstract
The utility model provides a regenerative energy-saving furnace device for multi-chamber smelting of secondary lead, which comprises at least 1 group of smelting furnaces; a gap bridge flue is arranged between the smelting furnaces; the group of smelting furnaces comprises 2 smelting furnace main bodies; the top of each smelting furnace main body is provided with a waste lead plaster feeding port; two symmetrical sides of the waste lead plaster feeding port are respectively provided with a burner, and the burners are used for supplying heat energy required by the smelting furnace; and the side surface of each smelting furnace main body is provided with an independent slag discharge port, a lead discharge port and a reducing agent charging port. The device is a connected smelting furnace, smelting smoke heats materials in another furnace, the heat energy utilization rate is high, the comprehensive energy consumption in the secondary lead smelting process is reduced, and the energy-saving effect is obvious. The device has the advantages of simple structure, easy operation, low investment cost and convenient and simple maintenance.
Description
Technical Field
The utility model belongs to the secondary lead recovery field especially relates to a regenerative energy-saving furnace device is smelted to secondary lead multi-chambered.
Background
The waste lead-acid battery lead plaster is generally reduced and smelted by adopting a blast furnace, a converter or an oxygen-enriched side-blown furnace, but the blast furnace smelting can be carried out in the blast furnace only by mixing, brick making and drying, the production process is longer, the energy consumption is high, and a furnace body also needs water jacket cooling; the smelting capacity of the converter is low, the number of required devices is large, and the energy consumption is relatively high; the oxygen-enriched side-blown converter has large investment and is suitable for large-scale smelting projects.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a regeneration lead multi-chamber melting heat accumulation formula energy-saving furnace device, the device is fit for the regeneration lead to be retrieved, and the energy consumption is low.
The utility model provides a regenerative energy-saving furnace device for multi-chamber smelting of secondary lead, which comprises at least 1 group of smelting furnaces; a gap bridge flue is arranged between the smelting furnaces; the group of smelting furnaces comprises 2 smelting furnace main bodies;
the top of each smelting furnace main body is provided with a waste lead plaster feeding port;
two symmetrical sides of the waste lead plaster feeding port are respectively provided with a burner, and the burners are used for supplying heat energy required by the smelting furnace;
and the side surface of each smelting furnace main body is provided with an independent slag discharge port, a lead discharge port and a reducing agent charging port.
Preferably, the smelting furnace body is cylindrical.
Preferably, the side walls and the bottom surface of the furnace body are smoothly transitioned.
Preferably, a gas-collecting hood is arranged above the charging opening.
Preferably, on the same horizontal plane, the upper side surface of one smelting furnace main body is respectively provided with a first flue gas outlet, and the first flue gas outlets are connected with first flue gas outlet flues;
a second flue gas outlet is respectively arranged on the upper side surface of the other smelting furnace main body, and a second flue gas outlet flue is connected to the second flue gas outlet;
the first flue gas outlet flue is communicated with the second flue gas outlet flue.
Preferably, a flue gate A is arranged on the first flue gas outlet flue; and a flue gate B is arranged on the second flue gas outlet flue.
Preferably, the joint and communication position of the first flue gas outlet flue and the second flue gas outlet flue is connected with an ascending flue;
and a heat exchanger is arranged in the ascending flue.
Preferably, the heat exchanger is connected with a blower;
the air blower is used for blowing air to exchange heat with the heat exchanger.
Preferably, a bottom lead opening is arranged below the lead opening.
The utility model provides a regenerative energy-saving furnace device for multi-chamber smelting of secondary lead, which comprises at least 1 group of smelting furnaces; a gap bridge flue is arranged between the smelting furnaces; the group of smelting furnaces comprises 2 smelting furnace main bodies; the top of each smelting furnace main body is provided with a waste lead plaster feeding port; two symmetrical sides of the waste lead plaster feeding port are respectively provided with a burner, and the burners are used for supplying heat energy required by the smelting furnace; and the side surface of each smelting furnace main body is provided with an independent slag discharge port, a lead discharge port and a reducing agent charging port. 2 smelting furnaces in the energy-saving furnace device, wherein one smelting furnace works and the other smelting furnace waits to work alternately; waste lead plaster is added into a smelting furnace main body through a waste lead plaster feeding port, a reducing agent is added through a reducing agent feeding port, the required smelting temperature is reached through heat energy supplied by a burner, lead compounds in the waste lead plaster are reduced into metal lead and sink to the bottom of the furnace, the metal lead is discharged through a lead discharge port, generated slag is discharged through a slag discharge port, and after the smelting of a working furnace is finished, the waste heat of smoke is used for melting the raw materials of the furnace to be worked. The device is a connected smelting furnace, smelting smoke heats materials in another furnace, the heat energy utilization rate is high, the comprehensive energy consumption in the secondary lead smelting process is reduced, and the energy-saving effect is obvious. The device has simple structure, easy operation, low investment cost, convenient and simple maintenance and low furnace start-up and shutdown cost, and is very suitable for the recovery treatment of the secondary lead; clean production is realized, dust hazard in a workshop is eliminated, and the labor condition of workers is improved; the unit energy consumption of the secondary lead is greatly reduced compared with that of converter smelting.
Drawings
FIG. 1 is a front view of a multi-chamber melting furnace system;
FIG. 2 is a top view of a multi-chamber melting furnace system;
fig. 3 is a schematic side view of the melting furnace main body.
Detailed Description
The utility model provides a regenerative energy-saving furnace device for multi-chamber smelting of secondary lead, which comprises at least 1 group of smelting furnaces; a gap bridge flue is arranged between the smelting furnaces; the group of smelting furnaces comprises 2 smelting furnace main bodies;
the top of each smelting furnace main body is provided with a waste lead plaster feeding port;
two symmetrical sides of the waste lead plaster feeding port are respectively provided with a burner, and the burners are used for supplying heat energy required by the smelting furnace;
and the side surface of each smelting furnace main body is provided with an independent slag discharge port, a lead discharge port and a reducing agent charging port.
Referring to fig. 1, fig. 1 is a front view of a multi-chamber smelting furnace system; FIG. 2 is a top view of a multi-chamber melting furnace system;
FIG. 3 is a schematic side view of the main body of the melting furnace; the device comprises a smelting furnace body wall 1, a first flue gas outlet flue 2-1, a second flue gas outlet flue 2-2, a burner 3, a waste lead plaster feeding port 4, a gap bridge flue 5, a slag tap 6 and a lead tap 7.
The utility model provides a regenerative lead multi-chamber smelting heat accumulating type energy-saving furnace device, which comprises at least 1 group of smelting furnaces; a series of melting furnaces includes 2 melting furnace bodies. The furnace body is preferably cylindrical; the 2 smelting furnace bodies are connected through a short gap bridge flue 5.
The sides and bottom of the furnace body walls 1 of the furnace body are preferably smoothly transitional.
The top of each smelting furnace main body is provided with a waste lead plaster feeding port 4; the lead-free lead-plaster is preferably conveyed to a furnace top operating platform of a multi-chamber smelting furnace through a spiral conveyor, and is conveyed to the furnace through a furnace top waste lead-plaster feeding port by a feeding chute for reduction smelting. In order to reduce the pollution to the environment, the gas generated in the furnace is collected; the gas-collecting hood is preferably arranged above the charging opening on the furnace top. The charging is carried out batchwise, the charge being slowly melted in the furnace.
And two symmetrical sides of the waste lead plaster feeding port are respectively provided with a burner 3, and the burners are used for supplying heat energy required by the smelting furnace. The burner is used for burning natural gas or heavy oil and other fuels and providing heat energy for the furnace.
In the application, on the same horizontal plane, the upper side surface of one smelting furnace main body is respectively provided with a first flue gas outlet, and the first flue gas outlet is connected with a first flue gas outlet flue 2-1; and a flue gate A is arranged on the first flue gas outlet flue.
A second flue gas outlet is respectively arranged on the upper side surface of the other smelting furnace main body, and a second flue gas outlet flue 2-2 is connected to the second flue gas outlet; and a flue gate B is arranged on the second flue gas outlet flue.
The first flue gas outlet flue is communicated with the second flue gas outlet flue. The joint and communication position of the first flue gas outlet flue and the second flue gas outlet flue is connected with an ascending flue; and a heat exchanger is arranged in the ascending flue. The heat exchanger is connected with the blower; the air blower is used for blowing air to exchange heat with the heat exchanger. The heat exchange process comprises the following steps: the flue gas flows through the heat exchange tube from bottom to top in the uptake flue, the air is blown into the heat exchange tube by the air blower and moves from top to bottom, the flue gas and the air realize countercurrent flow in the process, the preheated air finally enters the hearth for supporting combustion, the device reuses the flue gas waste heat, the energy utilization rate is improved, and the comprehensive energy consumption in the secondary lead smelting process is reduced.
A bottom lead port is arranged below the lead placing port and is not drawn in the figure. And after the smelting furnace stops working, discharging all lead materials from a bottom lead port.
The smelting furnace main body is provided with a reducing agent charging opening, and the reducing agent charging opening is arranged on the wall of the smelting furnace main body opposite to the lead placing opening and is not shown in the figure. The reducing agent charging opening is used for adding a reducing agent; the reducing agent comprises pig iron chips and/or coal. Lead compounds in the waste lead plaster are gradually reduced into metal lead under the action of a reducing agent and sink to the bottom of the furnace, a slag layer is slowly thinned, and a certain amount of lead compounds are added from a reducing agent charging hole according to requirementsFusing agent; the flux comprises CaO and SiO2And adjusting the slag shape to further settle and separate lead and slag, completing reduction smelting, and then discharging lead from a lead discharging port and slag from a slag discharging port respectively. Generally, lead is discharged after slag is completely discharged, and produced crude lead is refined to be made into alloy or lead ingots. The utility model discloses a visulization is looked over the viscosity or the mobility of sediment or is contained plumbous and confirm whether reduction reaction and slagging reaction finish in the stove.
The main reaction in the energy-saving furnace is as follows, namely, lead plaster obtained by crushing waste lead-acid storage batteries is desulfurized, and the main component is PbCO3And then the lead is reduced into metallic lead in a multi-chamber smelting furnace. The main reduction reactions taking place in the multi-chamber smelting furnace include:
PbCO3→PbO+CO2↑
PbSO4→PbO+SO2↑
PbO+C→Pb+CO↑
CO2+C→2CO↑
the main slagging reaction is as follows:
PbO+SiO2＝PbO·SiO2
FeO+SiO2＝FeO·SiO2
CaO+SiO2＝CaO·SiO2
in the application, two smelting furnaces in one group are alternately heated and smelted, namely one smelting furnace is in a working state, the other smelting furnace is in a standby working state, and flame of the working furnace enters the standby working furnace through a gap bridge flue and heats and melts materials in the furnaces. The smelting furnace discharges flue gas containing carbon dioxide and sulfur dioxide, and the flue gas is sent to a desulfurizing tower after being recovered by waste heat of a bridge flue and a waste heat boiler and purified by a bag dust collector, and the sulfur dioxide is removed to reach the standard and is discharged. The smoke dust collected by the bag dust collector and the furnace burden are directly returned to the furnace for smelting. The produced crude lead is discharged through a lead discharging port, and is sent to a fire refining method in a molten state to remove impurities such as copper, and slag containing less than 2% of lead is directly sold to a cement factory.
Two smelting furnaces in one group are respectively marked as a furnace A and a furnace B, after the lead is discharged from the furnace A, the smelting operation of the furnace A is finished, the gas supply of the furnace A is stopped, the furnace B is ignited, the production operation of the furnace B is carried out, the mixed raw materials added before the furnace B are used for continuously adding the raw materials to repeat the production operation of the furnace A by using the residual heat of the flue gas of the furnace A to melt the raw materials, and part of the mixed raw materials are added into the furnace A and are used for melting the raw materials by using the residual heat of the flue gas of the furnace B.
The regenerative lead multi-chamber smelting heat accumulating type energy-saving furnace device is operated by two furnaces alternately, the smelting temperature is 1300 ℃, the vertical yield is 96 percent, the smoke rate is less than 5 percent, and the slag rate is less than 15 percent. The smelting furnace discharges high-temperature flue gas (about more than 1000 ℃) containing sulfur dioxide, the high-temperature flue gas is settled through a communicated flue and waste gas, and the flame and the air input are adjusted through monitoring and controlling the temperature of carbon monoxide concentration, so that all organic matters and carbon monoxide are fully combusted. The lead content in the produced crude lead is not less than 98 percent, and the lead content in the slag is less than 1.8 percent.
From the viewpoint of raw material adaptability, the circular energy-saving furnace is very suitable for treating the converted lead plaster of the waste storage battery; lead plaster, wastes, sludge and the like of storage battery manufacturers only need to be decomposed and reduced under the high-temperature condition to produce crude lead; compared with direct lead smelting methods such as oxygen-enriched bottom blowing and side blowing, the method has essential difference, and lead plaster of waste storage batteries basically does not contain sulfur and does not need a strong oxidation process. According to the analysis of energy consumption, the waste heat of the smelting furnace is utilized most fully, the comprehensive energy consumption is the lowest, the waste heat of the smelting furnace in the working state firstly passes through the smelting furnace in the waiting working state and heats and melts the raw materials in the smelting furnace, and then the raw materials enter a dust collecting system. The comprehensive energy consumption is calculated to be below 130kgce/t lead. From the aspect of cost analysis, the investment and construction cost and the production cost of the circular energy-saving furnace are the lowest; the smelting furnace with the two-connected body and the three-connected body has low construction cost and is much lower than other metallurgical furnaces; the production cost of ton lead is low, the operation is simple, and the labor intensity is low. In addition, the energy-saving furnace is convenient and simple to maintain, has low start-up and shut-down cost, and is very suitable for recycling secondary lead; clean production is realized, dust hazard in a workshop is eliminated, and the labor condition of workers is improved.
The multi-chamber smelting furnace system comprises the regenerated lead multi-chamber smelting heat accumulating type energy-saving furnace device, a feeding system, a combustion system, a discharging system, a dust collecting system and matched equipment.
In order to further illustrate the present invention, the following describes the regenerated lead multi-chamber smelting regenerative energy-saving furnace device provided by the present invention in detail with reference to the following embodiments, but they should not be construed as limiting the scope of the present invention.
Example 1
Putting 100 tons of desulfurized waste storage battery lead plaster into a cylindrical A smelting furnace in batches through a waste lead plaster feeding port by adopting a screw feeder, wherein the main component is PbCO3The side wall and the bottom of the cylindrical A smelting furnace are in smooth transition, heat energy is provided for the furnace through burning natural gas at the burner, and the flow of the natural gas is 100-200 m3Adding 3000-5000 kg of raw scrap iron from a reducing agent feeding port, smelting at 1300 ℃, wherein the main reduction reaction comprises the following steps:
PbCO3→PbO+CO2↑
PbSO4→PbO+SO2↑
PbO+C→Pb+CO↑
CO2+C→2CO↑
the main slagging reaction is as follows:
PbO+SiO2＝PbO·SiO2
FeO+SiO2＝FeO·SiO2
CaO+SiO2＝CaO·SiO2
after the reaction of the furnace A is finished, discharging lead, stopping the gas supply of the furnace A after the smelting operation of the furnace A is finished, igniting the furnace B, and carrying out the production operation of the furnace B, wherein the mixed raw material is added before the furnace B, and the flue gas waste heat of the furnace A melts about 30 percent of the raw material in the furnace B through a gap bridge flue with the inner diameter of 500cm (width) multiplied by 600 (height) cm and the length of 500 cm; continuously adding raw materials to repeat the production operation of the furnace A, adding part of mixed raw materials into the furnace A, and melting the raw materials by using the waste heat of the flue gas of the furnace B;
smoke generated by smelting is discharged into a first smoke outlet flue and a second smoke outlet flue through a smoke outlet, and a joint and communication part of the first smoke outlet flue and the second smoke outlet flue is connected with an ascending flue; a heat exchanger is arranged in the ascending flue; the heat exchanger is connected with the blower; the air blower is used for blowing air to exchange heat with the heat exchanger.
Through detection, the lead yield is more than 96%, the smoke rate is less than 5%, and the slag rate is less than 15%.
The comprehensive energy consumption is below 130kg of standard coal/t lead.
Known from the above embodiment, the utility model provides a regenerative energy-saving furnace device for multi-chamber smelting of secondary lead, which comprises at least 1 group of smelting furnaces; a gap bridge flue is arranged between the smelting furnaces; the group of smelting furnaces comprises 2 smelting furnace main bodies; the top of each smelting furnace main body is provided with a waste lead plaster feeding port; two symmetrical sides of the waste lead plaster feeding port are respectively provided with a burner, and the burners are used for supplying heat energy required by the smelting furnace; and the side surface of each smelting furnace main body is provided with an independent slag discharge port, a lead discharge port and a reducing agent charging port. 2 smelting furnaces in the energy-saving furnace device, wherein one smelting furnace works and the other smelting furnace waits to work alternately; waste lead plaster is added into a smelting furnace main body through a waste lead plaster feeding port, a reducing agent is added through a reducing agent feeding port, the required smelting temperature is reached through heat energy supplied by a burner, lead compounds in the waste lead plaster are reduced into metal lead and sink to the bottom of the furnace, the metal lead is discharged through a lead discharge port, generated slag is discharged through a slag discharge port, and after the smelting of a working furnace is finished, the waste heat of smoke is used for melting the raw materials of the furnace to be worked. The device is a connected smelting furnace, smelting smoke heats materials in another furnace, the heat energy utilization rate is high, the comprehensive energy consumption in the secondary lead smelting process is reduced, and the energy-saving effect is obvious. The device has simple structure, easy operation, low investment cost, convenient and simple maintenance and low furnace start-up and shutdown cost, and is very suitable for the recovery treatment of the secondary lead; clean production is realized, dust hazard in a workshop is eliminated, and the labor condition of workers is improved; the unit energy consumption of the secondary lead is greatly reduced compared with that of converter smelting.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A regenerative lead multi-chamber smelting heat accumulating type energy-saving furnace device is characterized by comprising at least 1 group of smelting furnaces; a gap bridge flue is arranged between the smelting furnaces; the group of smelting furnaces comprises 2 smelting furnace main bodies;
the top of each smelting furnace main body is provided with a waste lead plaster feeding port;
two symmetrical sides of the waste lead plaster feeding port are respectively provided with a burner, and the burners are used for supplying heat energy required by the smelting furnace;
and the side surface of each smelting furnace main body is provided with an independent slag discharge port, a lead discharge port and a reducing agent charging port.
2. The apparatus of claim 1, wherein the furnace body is cylindrical.
3. The apparatus of claim 1, wherein the side walls and bottom surface of the furnace body are smoothly transitioned.
4. The apparatus of claim 1, wherein a gas-collecting hood is disposed above the charging port.
5. The device according to claim 1, characterized in that, on the same horizontal plane, the upper side of a smelting furnace main body is respectively provided with a first flue gas outlet which is connected with a first flue gas outlet flue;
a second flue gas outlet is respectively arranged on the upper side surface of the other smelting furnace main body, and a second flue gas outlet flue is connected to the second flue gas outlet;
the first flue gas outlet flue is communicated with the second flue gas outlet flue.
6. The apparatus according to claim 5, wherein the first flue gas outlet flue is provided with a flue gate A; and a flue gate B is arranged on the second flue gas outlet flue.
7. The apparatus according to claim 5, wherein a uptake is connected to the point where the first flue gas outlet flue and the second flue gas outlet flue meet;
and a heat exchanger is arranged in the ascending flue.
8. The apparatus of claim 7, wherein the heat exchanger is connected to a blower;
the air blower is used for blowing air to exchange heat with the heat exchanger.
9. The device of claim 1, wherein a bottom lead port is arranged below the lead-placing port.
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| CN201921876313.8U CN210765454U (en) | 2019-11-01 | 2019-11-01 | Regenerative lead multi-chamber smelting heat accumulating type energy-saving furnace device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116411174A (en) * | 2022-03-22 | 2023-07-11 | 湖北楚凯冶金有限公司 | Method and raw materials for short kiln smelting desulfurization lead plaster |
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2019
- 2019-11-01 CN CN201921876313.8U patent/CN210765454U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116411174A (en) * | 2022-03-22 | 2023-07-11 | 湖北楚凯冶金有限公司 | Method and raw materials for short kiln smelting desulfurization lead plaster |
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