Electric furnace-fuming furnace combined treatment device for crude lead refining copper slag removal
Through the combined treatment device of electric furnace-fume furnace, deep sulfide removal and volatilization of stannous sulfide are solved, and the problem of poor separation effect of copper lead in the prior art is solved, efficient separation and recycling is achieved, and treatment efficiency is high and pollution is low.
Patent Information
- Application Number
- CN202421626878.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-10
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-07-10
AI Technical Summary
In the prior art, copper lead separation effect is poor, and the treatment efficiency is low and the pollution is serious.
The electric furnace-fume furnace joint treatment device is used to deeply sulfidize and remove copper through the electric furnace to obtain crude lead with low copper content, and then stannous sulfide is volatilized in the smoke furnace, and iron filings are used to replace lead sulfide, thereby achieving efficient separation of copper and lead.
It realizes efficient separation of copper lead, produces copper with lead content less than 1% and crude lead with copper content less than 0.2%, and can recover tin in the copper scum in the form of stannous sulfide. The device has a compact structure, good separation effect and high processing efficiency.
Smart Images
Figure CN223047568U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of solid waste resource treatment, in particular to an electric furnace - fuming furnace combined treatment device for removing copper slag from crude lead refining. Background Technique
[0002] For the fire refining of crude lead to remove copper, two methods are mostly used: liquidation de - copperization and sulfur addition de - copperization. Both methods will produce waste slag, that is, copper slag removed from crude lead refining, which is called copper matte in the industry. The main components of this slag include crude lead, lead sulfide and cuprous sulfide. Depending on the source of crude lead and the copper removal process, the composition of copper matte will vary. For example, the copper matte produced in the process of recycling waste lead - acid batteries may contain more tin in addition to the above - mentioned components.
[0003] The treatment of copper matte mainly adopts two processes: pyrometallurgy and hydrometallurgy. The pyrometallurgical treatment of copper matte mostly uses the "soda - iron filings" method. The main principle is to promote slag - lead separation by means of a high temperature of about 1200 °C, and add sodium carbonate and iron filings to replace lead sulfide in the matte with metallic lead. The generated ferrous sulfide and cuprous sulfide in the slag form copper matte, thus realizing the separation and recovery of copper and lead. The traditional equipment for the pyrometallurgical treatment of copper matte includes reverberatory furnaces and blast furnaces, but there are problems such as poor copper - lead separation effect, low energy efficiency and serious pollution. The hydrometallurgical process involves steps such as chemical leaching and electrolysis, which can be carried out under relatively low - temperature conditions and has the advantage of high copper - lead separation efficiency, but is mainly applicable to slag materials containing about 20% copper. The economic efficiency of treating low - copper - content matte by hydrometallurgy is not good. Content of the Utility Model
[0004] The utility model aims to provide a treatment device for removing copper slag from crude lead refining to solve the problem of poor current copper - lead separation effect.
[0005] To achieve the above - mentioned purpose, the utility model provides an electric furnace - fuming furnace combined treatment device for removing copper slag from crude lead refining, including: an electric furnace, a fuming furnace and a fuming lance. The electric furnace is provided with an electric - furnace feeding port and an electric - furnace exhaust port. The fuming furnace is provided with a cold - material inlet and a fuming - furnace exhaust port. The electric furnace and the fuming furnace are connected through a flow channel. The side of the fuming furnace is provided with a matte outlet and a crude - lead outlet. A graphite electrode is arranged in the electric furnace. The fuming lance is installed on the fuming furnace, and the nozzle of the fuming furnace is located inside the fuming furnace.
[0006] Principle of this solution: The copper-removing slag from crude lead refining, pyrite, and mineral reducing agent are added into the electric furnace from the charging port of the electric furnace according to a preset ratio, and are fully melted and reacted in the electric furnace. The pyrite added reacts with the copper in the raw material to form cuprous sulfide. The generated flue gas is discharged through the smoke exhaust port of the electric furnace. The mixed melt enters the fuming furnace through the runner and undergoes natural stratification in the fuming furnace. The upper layer is a mixed melt of lead sulfide, cuprous sulfide, stannous sulfide, and ferrous sulfide, and the lower layer is crude lead. Iron filings are added into the fuming furnace from the cold charge inlet, and air and pulverized coal are sprayed into the upper layer of the sulfide melt through the fuming lance, causing the melt to churn violently, promoting the replacement of lead sulfide by iron filings to form metallic lead that sinks to the furnace bottom. Stannous sulfide forms soot and can be recovered by collecting the flue gas of the fuming furnace. Cuprous sulfide and ferrous sulfide are basically non-volatile and finally remain in the fuming furnace in the form of matte melt and are discharged through the matte outlet.
[0007] Advantages of this solution: This solution first uses an electric furnace for deep desulfurization and copper removal to obtain crude lead with a low copper content, and then uses a fuming furnace to promote the volatilization of stannous sulfide. Iron filings replace lead sulfide with metallic lead to obtain matte with a low lead content, thus realizing the efficient separation of copper and lead. It can not only produce matte with a lead content below 1% and crude lead with a copper content below 0.2%, but also recover tin in copper dross in the form of stannous sulfide; the device has a compact structure, good separation effect, and high treatment efficiency.
[0008] Preferably, the fuming lance is symmetrically installed on the fuming furnace to uniformly heat the melt in the fuming furnace.
[0009] Preferably, the number of fuming lances is multiple and they are uniformly arranged at the lower part of the fuming furnace.
[0010] Preferably, the number of graphite electrodes is multiple and they are uniformly distributed in the electric furnace.
[0011] Preferably, the axis of the charging port of the electric furnace and the axis of the connection port between the electric furnace and the runner are in the same plane.
[0012] Preferably, the matte outlet and the crude lead outlet are flush. Setting the crude lead outlet and the matte outlet flush can minimize the problem that the stratification position needs to be accurately positioned due to the vertical arrangement of the two outlets. During separation, only the denser crude lead needs to be discharged first, and then the less dense matte can be discharged, thus reducing the mixing caused by the height difference between the two outlets.
[0013] Preferably, both the cold charge inlet and the fuming furnace smoke exhaust port are arranged at the top of the fuming furnace.
[0014] Preferably, the fuming furnace smoke exhaust port is in an inverted L shape.
[0015] Preferably, the smoke exhaust port of the electric furnace is arranged on the electric furnace at an angle upward, so that the smoke can flow naturally along the inclined direction of the smoke exhaust port, thereby increasing the exhaust speed of the smoke. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a top view schematic diagram of an embodiment of the utility model.
[0017] Figure 2 It is a front view schematic diagram of an embodiment of the utility model. DETAILED DESCRIPTION
[0018] The following is further described in detail through specific implementation methods:
[0019] The figure marks in the drawings of the specification include: electric furnace 1, graphite electrode 2, flow channel 3, fuming furnace 4, fuming spray gun 5, electric furnace charging port 6, electric furnace exhaust port 7, cold material inlet 8, fuming furnace exhaust port 9, matte outlet 10, and crude lead outlet 11.
[0020] Example:
[0021] An electric furnace-fuming furnace combined treatment device for crude lead refining and copper slag removal, as shown in the attached Figure 1 and attached Figure 2 As shown, it includes: an electric furnace 1, a fuming furnace 4 and a fuming spray gun 5. The electric furnace 1 is provided with an electric furnace charging port 6 and an electric furnace exhaust port 7. The electric furnace exhaust port 7 is arranged on the electric furnace 1 at an angle upward, so that the smoke flows naturally along the inclined direction of the exhaust port, thereby increasing the exhaust speed of the smoke. The electric furnace 1 is provided with a graphite electrode 2, and the number of graphite electrodes 2 is multiple and evenly distributed in the electric furnace 1. In this embodiment, three graphite electrodes 2 are provided and are evenly distributed in the electric furnace 1. In this embodiment, the submerged arc furnace is an electric heating furnace, the submerged arc furnace height H1 = 3 ~ 5m, the furnace radius R1 = 1400 ~ 2000mm, the polar center circle radius R2 of the graphite electrode 2 = 600 ~ 800mm, and the diameter D1 of the graphite electrode 2 = 400 ~ 600mm.
[0022] The fuming furnace 4 is provided with a cold material inlet 8 and a fuming furnace exhaust port 9, and the axis of the electric furnace charging port 6 is located in the same plane as the axis of the connecting port of the electric furnace 1 and the flow channel 3. The cold material inlet 8 and the fuming furnace exhaust port 9 are both arranged at the top of the fuming furnace 4, and the fuming furnace exhaust port 9 is in an inverted L shape. The electric furnace 1 is connected to the fuming furnace 4 through the flow channel 3, and the fuming furnace 4 is provided with a matte outlet 10 and a crude lead outlet 11 on the side, and the matte outlet 10 and the crude lead outlet 11 are flush. The crude lead outlet 11 and the matte outlet 10 are arranged flush, which can avoid as much as possible that when the two outlets are arranged up and down, the upper and lower layered materials will be mixed together when the lead or copper is extracted at the layered position of the two, affecting the purification effect of the material. In this embodiment, the fuming furnace 4 has a length of L = 2 to 4m, a width of W = 1.5 to 3m, and a height of H2 = 5 to 7m.
[0023] The spout of the fuming furnace 4 is located inside the fuming furnace 4, and the fuming lance 5 is symmetrically installed at the lower part of the fuming furnace 4. The melt inside the fuming furnace 4 is uniformly heated. The number of fuming lances 5 is multiple, and the fuming lances 5 are uniformly arranged on the fuming furnace 4. Air and pulverized coal are sprayed into the melt through the fuming lance 5, causing the melt to violently churn, promoting the replacement of PbS by iron filings to metallic lead which sinks to the furnace bottom. The relevant replacement reaction is: Fe + PbS = FeS + Pb.
[0024] Among them, the inner diameter D2 of the fuming lance 5 is 30 - 50 mm, and the spacing d is 300 - 450 mm. In this embodiment, 8 fuming lances 5 are installed on the fuming furnace 4. The fuming lances 5 are arranged on the side of the fuming furnace 4. The cold material inlet 8 is located above the runner 3, and its axis coincides with the axis of the runner 3.
[0025] The specific implementation process is as follows:
[0026] First, the copper - removing slag from crude lead refining, pyrite, and carbonaceous reducing agent are configured in a preset ratio, and then fed into the electric furnace 1 from the electric furnace charging port 6 of the electric furnace 1. The copper - removing slag from crude lead refining, pyrite, and carbonaceous reducing agent are fully melted and reacted in the electric furnace 1. The added pyrite reacts with the copper in the raw material to form cuprous sulfide. The flue gas generated by the reaction is discharged from the electric furnace flue gas outlet 7, and after being discharged, corresponding flue gas treatment is carried out. The molten mixture after melting and reaction in the electric furnace 1 enters the fuming furnace 4 through the runner 3, and naturally stratifies inside the fuming furnace 4. The upper layer is a mixed melt of lead sulfide, cuprous sulfide, stannous sulfide, and ferrous sulfide, and the lower layer is crude lead, which is discharged from the crude lead outlet 11. According to actual needs, iron filings are added into the fuming furnace 4 through the cold material inlet 8, and air and pulverized coal are sprayed into the upper - layer sulfide melt through the fuming lance 5, causing the melt to violently churn, promoting the replacement of PbS by iron filings to metallic lead which sinks to the furnace bottom. A small amount of PbS not replaced by iron volatilizes at high temperature and finally enters the dust. The sulfide of tin (stannous sulfide) volatilizes rapidly into the flue gas, and then enters the flue gas treatment and recovery through the fuming furnace flue gas outlet 9. The cuprous sulfide and ferrous sulfide in the mixed melt basically do not volatilize and finally remain in the fuming furnace 4 in the form of matte melt. After discharging the crude lead, it can be discharged from the matte outlet 10.
[0027] The device of this solution has a compact structure, good separation effect, and high treatment efficiency; first, the electric furnace 1 is used for deep desulfurization and copper removal to obtain crude lead with low copper content, then the fuming furnace 4 is used to promote the volatilization of stannous sulfide, and iron filings are used to replace lead sulfide, thus realizing the efficient separation of copper and lead. It can produce matte with lead content lower than 1% and crude lead with copper content lower than 0.2%, and can recover tin in the copper dross in the form of stannous sulfide.
[0028] The above are only embodiments of the present utility model. Specific technical solutions and / or common knowledge such as characteristics well known in the art are not described in detail herein. It should be noted that for those skilled in the art, without departing from the technical solution of the present utility model, several deformations and improvements can be made. In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation" 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 directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. The scope of protection required by this application should be based on the content of its claims, and the specific implementation manners described in the specification can be used to explain the content of the claims.
Claims
1. An electric furnace-fuming furnace combined treatment device for crude lead refining and copper slag removal, characterized in that: include: An electric furnace, a fuming furnace and a fuming spray gun, the electric furnace is provided with an electric furnace charging port and an electric furnace exhaust port, the fuming furnace is provided with a cold material inlet and a fuming furnace exhaust port, the electric furnace is connected with the fuming furnace through a flow channel, a matte outlet and a crude lead outlet are provided on the side of the fuming furnace, a graphite electrode is provided in the electric furnace, the fuming spray gun is installed on the fuming furnace, and the nozzle of the fuming furnace is located in the fuming furnace.
2. The electric furnace-fuming furnace combined treatment device for removing copper slag from crude lead refining according to claim 1 is characterized in that: The fuming spray guns are symmetrically mounted on the fuming furnace.
3. The electric furnace-fuming furnace combined treatment device for removing copper slag from crude lead refining according to claim 1 is characterized in that: There are multiple fuming spray guns, which are evenly arranged at the lower part of the fuming furnace.
4. The electric furnace-fuming furnace combined treatment device for removing copper slag from crude lead refining according to claim 1 is characterized in that: There are multiple graphite electrodes, and the graphite electrodes are evenly distributed in the electric furnace.
5. The electric furnace-fuming furnace combined treatment device for removing copper slag from crude lead refining according to claim 1 is characterized in that: The axis of the electric furnace charging port and the axis of the connecting port of the electric furnace and the flow channel are located in the same plane.
6. The electric furnace-fuming furnace combined treatment device for removing copper slag from crude lead refining according to claim 1 is characterized in that: The matte outlet is flush with the crude lead outlet.
7. The electric furnace-fuming furnace combined treatment device for removing copper slag from crude lead refining according to claim 1 is characterized in that: The cold material inlet and the smoke exhaust port of the fuming furnace are both arranged on the top of the fuming furnace.
8. The electric furnace-fuming furnace combined treatment device for removing copper slag from crude lead refining according to claim 7 is characterized in that: The smoke exhaust port of the fuming furnace is in an inverted L shape.
9. The electric furnace-fuming furnace combined treatment device for removing copper slag from crude lead refining according to claim 1, characterized in that: The electric furnace smoke exhaust port is arranged on the electric furnace obliquely upward.