CN109913687B - Application of carbon powder in preparation of quaternary alloy anode plate - Google Patents
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Abstract
The invention relates to the technical field of electrochemical treatment, in particular to application of carbon powder in preparation of a quaternary alloy anode plate, which is prepared by taking Pb, Al, Ca and Sr materials as raw materials through the processes of melting, primary melting, secondary melting, stirring and casting into ingots, forging and rolling and punching, wherein carbon powder accounting for 1.2-2% of the mass of liquid obtained by melting is added into the quaternary alloy anode plate before primary melting. Not only can effectively avoid gas entering to cause the alloy liquid to breathe in, reduce the oxidation loss rate, but also can avoid the defect that the doping amount in the alloy liquid is larger due to the addition of excessive covering agent, thereby ensuring the comprehensive performance of the quaternary alloy anode plate material and improving the quality of the quaternary alloy anode plate.
Description
Technical Field
The invention relates to the technical field of electrochemical treatment, in particular to application of carbon powder in preparation of a quaternary alloy anode plate.
Background
With the rapid development of chemical industry, metallurgical industry and other industrial industries, a large amount of organic matter components enter waste water due to the addition of novel additives, pharmaceutical chemicals and other chemical substances, so that the components and the structure of the waste water are complicated, and the mixing of the organic matter components is gradually accumulated in the environment due to the biotoxicity and the difficult biodegradation performance, so that the environment is seriously polluted, and the human survival safety is threatened to a great extent.
At present, there are many methods for treating refractory organics in wastewater, such as supercritical water oxidation, photocatalytic method, ultrasonic method, fenton's reagent method, microwave method, electrochemical method, etc., wherein the electrochemical method has the advantages of simple operation, convenient automatic control, mild reaction conditions, no secondary pollution, simple post-treatment, and can be combined with other treatment methods, and has efficient degradation capability for refractory organics, and in the process of degrading organic pollutants, no other reagent is needed to be added, and the method belongs to a green chemical process, and becomes a hotspot in current wastewater treatment research. In the process of electrochemically treating organic pollutants for degradation, the organic pollutants are mainly influenced by factors such as surface properties of anode materials, the configuration of an electrochemical reactor, the physicochemical properties of organic matters, the state of a solution and the like, so that the organic pollutants are used for electrochemically catalyzing oxygenThe anode material for chemically degrading organic matters is rapidly researched and developed, for example: in the electrode material of the electrolysis engineering for electrochemically treating organic wastewater with the patent application number of 201711140416.3, a quaternary alloy is used as a positive electrode, graphite is used as a negative electrode to form a primary electrolysis system, the chemical activity of iron ions and aluminum ions is induced in a mode of sacrificing the positive electrode to quickly form a large number of micro-batteries, meanwhile, insoluble particles forming chromaticity can be adsorbed and coagulated by a generated ferric hydroxide colloid coagulant to be removed, wherein the adopted quaternary alloy components contain 0.3-0.5% of calcium by weight, 0.5-1% of aluminum by weight, 20-30% of tin by weight and the balance of lead, and the current density is 0.1-0.2A-cm-2(ii) a The electrolysis time is 45 min; the Fe/Al bimetal assisted electrolysis method for treating the wastewater realizes the electrolysis treatment of the organic wastewater under the conditions that the pH value is 5-10 and the electrolysis voltage reaches 10-15V, so that the decolorization rate can reach 99% and the COD removal rate reaches 84% in the electrolysis of the indigo dye sewage of jeans.
Therefore, the quaternary alloy material used as the anode plate is prepared by mixing Pb with a larger specific gravity and calcium, strontium and other materials with a smaller specific gravity, but in the preparation process, the materials with the larger specific gravity are melted into a solution along with improper control of the material adding process, so that the prepared quaternary alloy material has poorer comprehensive performance and has unsatisfactory treatment effect when being used for treating organic wastewater (such as indigo polluted wastewater) and the like; in the prior art, in the process of preparing the quaternary alloy material, a researcher effectively solves the technical defects by adding a covering agent for covering; however, in the adding process, improper selection of the covering agent and improper control of the adding amount are often accompanied, so that the covering agent is insufficient, and incomplete covering is caused; the excessive covering agent causes more doping amount, further greatly influences the hardness, tensile strength and resistivity of the prepared quaternary alloy material, and causes the treatment result to be still unsatisfactory when the quaternary alloy material is used for electrochemical treatment of organic wastewater.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides application of carbon powder in preparation of a quaternary alloy anode plate.
The method is realized by the following technical scheme:
the application of carbon powder in the preparation of the quaternary alloy anode plate is characterized in that Pb, Al, Ca and Sr materials are used as raw materials, the quaternary alloy anode plate is prepared by the processes of melting, primary smelting, secondary smelting, stirring and casting into ingots, forging and rolling and punching, and carbon powder accounting for 1.2-2% of the liquid mass obtained by melting is added into the quaternary alloy anode plate before the primary smelting. By controlling the adding amount of the carbon powder, the carbon powder is added to a liquid metal surface formed by melting as a covering agent, so that gas can be effectively prevented from entering, alloy liquid is caused to absorb gas, the oxidation burning loss rate is reduced, the defect of large doping amount in the alloy liquid due to the addition of excessive covering agent can be avoided, the comprehensive performance of the quaternary alloy anode plate material is ensured, and the quality of the quaternary alloy anode plate is improved.
Preferably, the adding amount of the carbon powder is 1.5-2% of the liquid mass obtained by melting.
Preferably, the adding amount of the carbon powder is 1.8 percent of the liquid quality obtained by melting.
Preferably, the melting is to heat and melt the Pb material into liquid in a graphite crucible, then add the Al material to carry out primary melting, and after the Al material is melted into liquid, add the mixed material of the Ca material and the Sr material to carry out secondary melting for 10-15 min.
Preferably, the temperature of the smelting, the primary smelting and the secondary smelting is equal and is 750-850 ℃.
Preferably, during the secondary smelting, the mixed materials are added into the metal alloy liquid obtained by the primary smelting by adopting a pressing-in method.
The carbon powder applied to the preparation of the quaternary alloy anode plate can be applied to the preparation method of the anode plate, such as: the preparation method of the anode plate for indigo wastewater treatment comprises the following steps:
(1) adding lead into a graphite crucible, and heating and melting to form molten liquid;
(2) controlling the temperature of the molten liquid at 750-850 ℃, adding aluminum into the molten liquid according to the weight content of 1.2-2.7%, smelting at constant temperature for one time, and obtaining metal liquid after the aluminum is completely molten into liquid state;
(3) controlling the temperature to be 750-850 ℃, adding calcium according to the weight content of 0.1-0.28 percent and strontium according to the weight content of 17-19 percent into the mixture, stirring at constant temperature for secondary smelting, casting into ingots, calcining, rolling and punching to obtain the anode plate for treating the indigo wastewater.
In the above method, in order to avoid the defect of large oxidation burning loss after the addition of Al, preferably, in the step (2), carbon powder accounting for 1.2-2% of the mass of the metal liquid is added by adopting a pressing method in the adding process of the aluminum or added into the aluminum in the adding process. The material components in the preparation process of the anode plate are added according to a certain sequence, so that after the lead component with high specific gravity is firstly melted into liquid, aluminum, calcium and strontium are sequentially added and melted, and are stirred to realize uniform mixing, the raw material mixing difficulty of the anode plate is reduced, the preparation cost of the anode plate is reduced, the excellent comprehensive performance of the anode plate is ensured, and the quality is improved.
In order to avoid the defects that calcium and strontium with small specific gravity float on the surface of the metal solution, which leads to poor quality and performance of the prepared product, preferably, the step (3) adopts a pressure-in method for adding during the calcium and strontium adding process.
When the anode plate for treating the indigo wastewater is used for treating the indigo polluted wastewater, a bimetal Fe/Al is added according to the mass ratio of 1:0.2-0.8 to assist electrolysis treatment
In the process of treating the indigo polluted wastewater, an electrolysis system is composed of a quaternary alloy anode plate and graphite serving as a cathode (cathode), wherein in the quaternary alloy material, calcium accounts for 0.1-0.28% by weight, aluminum accounts for 1.2-2.7% by weight, strontium accounts for 17-19% by weight, and the balance is lead.
The electrolysis system which is composed of the anode made of the quaternary alloy material and the cathode made of the graphite, then the chemical activity of aluminum ions is induced by sacrificing the mode of the anode (anode), a large number of micro-electrolysis cells are quickly formed, the degradation capability of organic matters which are difficult to degrade in organic wastewater is improved, aluminum ions quickly form aluminum hydroxide colloid, the colloid has strong adsorption performance, a large number of colors in the organic wastewater can be coagulated and adsorbed, and the decolorization rate of the organic wastewater is improved.
In order to reduce the COD content in the organic wastewater and improve the decolorization rate, the quaternary alloy material preferably contains 0.23 wt% of calcium, 2.5 wt% of aluminum, 18 wt% of strontium and the balance of lead.
In order to further reduce the COD content in the organic wastewater and improve the decolorization rate, the quaternary alloy material preferably contains 0.17 wt% of calcium, 1.8 wt% of aluminum, 17 wt% of strontium and the balance of lead.
The electrode material provided by the invention can enhance the treatment capacity of organic wastewater, reduce COD content and improve decolorization rate under proper electrolysis conditions, so that in the process of treating organic wastewater, Fe and Al bimetal is used for assisting in electrolyzing wastewater, the pH value of the wastewater is controlled to be 5-10, the electrolysis voltage is 10-15V, the electrolysis time is controlled to be 50-60min, and the current density is 0.1-0.2A-cm-2. The COD removal rate is improved by 3-5% to a great extent. Particularly, in the process of double-metal-assisted electrolysis of wastewater, a large number of micro-electrolysis cells are formed, the chemical activity of iron ions and aluminum ions is enhanced, the colloid formed by mixing iron hydroxide and aluminum hydroxide is quickly formed and is quickly condensed, the color adsorption capacity of the organic wastewater is enhanced, and the decoloring capacity is improved.
In order to ensure that the relative content of the formed aluminum hydroxide and ferric hydroxide mixed colloid is in a proper mixing ratio range and ensure that the color removal capability in the organic wastewater can be better enhanced, preferably, the electrode material is used for treating the organic wastewater, Fe and Al double metals are mixed according to the mass ratio of 1:0.2-0.8 to assist in electrolyzing the wastewater, the pH value of the wastewater is controlled to be 5-10, the electrolysis voltage is 13V, the electrolysis time is controlled to be 55min, and the current density is 0.15A-cm-2。
More preferably, the Fe and Al bimetal is mixed according to the mass ratio of 1:0.6 in the process of assisting electrolysis of the wastewater.
In order to avoid the defects that the components of strontium, calcium and the like with lower specific gravity float on the surface of a smelting solution after being added into a smelting furnace, so that the performance of the obtained quaternary alloy material is poor, and further the COD removal rate in the organic wastewater is low, preferably, in the smelting process of the electrode material, the strontium is mixed with the calcium and then added into the electrode material for smelting by adopting a pressing-in method.
In the process of preparing the electrode material, the four-element alloy material is processed into an anode plate (positive plate) after being purchased in the market or is smelted by the four-element alloy material, wherein the smelting process refers to the processes disclosed in the prior art, such as: heating lead in a graphite crucible to melt and smelt, adding a small amount of carbon powder and Al material in the smelting process, adding a solvent and calcium and strontium raw material components into the Al material after the Al material is smelted into metal liquid to carry out secondary smelting, stirring and mixing uniformly, casting into ingots, and forging, rolling and punching into anode plates (positive plates).
The calcium and strontium components are added in the last step, so that the oxidation burning loss can be effectively reduced, the graphite crucible is adopted, the cost is reduced, the chemical property stability of the treatment process is improved, the carbon powder and the Al material are mixed and added for smelting, the alloy inspiration and the oxidation burning loss can be effectively reduced, the adding amount of the carbon powder is optimally controlled to be 1.8 percent of the weight of the alloy liquid in the adding process, and the organic matter degradation capability of the electrode material as an anode plate in the organic wastewater treatment process can be improved; in order to reduce the oxidation burning loss of the alloy liquid on the premise of ensuring the quality of the alloy material, the smelting time after the calcium and strontium components are added is controlled within 15min, and is preferably 13 min; the temperature of the whole smelting process is between 750 and 850 ℃; stirring before pouring is helpful for improving the uniformity of the molten metal, and can avoid excessive sinking of materials with larger specific gravity, such as lead, and the like, which leads to poor quality of the prepared material. The preparation process is beneficial to improving the hardness, tensile strength, resistivity and the like of the alloy material, so that the alloy material is used for carrying out electrochemical treatment on organic wastewater, and the degradation capability on organic pollutants is greatly improved; but also can form good assistance with bimetal, and enhance the removal rate of COD and the removal rate of color in the organic wastewater.
Detailed Description
The technical solution of the present invention is further defined below by referring to the specific embodiments of the experimental procedures, but the scope of protection is not limited to the description.
In some embodiments, the application of the carbon powder in the preparation of the quaternary alloy anode plate is to prepare the quaternary alloy anode plate by taking Pb, Al, Ca and Sr materials as raw materials through the processes of melting, primary smelting, secondary smelting, stirring and casting into ingots, forging and rolling and punching, and before the primary smelting, the carbon powder accounting for 1.2-2% of the mass of the liquid state obtained by melting is added into the quaternary alloy anode plate.
In some embodiments, the carbon powder is added in an amount of 1.5-2% of the mass of the liquid obtained by melting.
In some embodiments, the carbon powder is added in an amount of 1.8% of the mass of the liquid obtained by melting.
In some embodiments, the melting is performed by heating and melting a Pb material into a liquid state in a graphite crucible, adding an Al material for primary melting, and adding a mixed material of a Ca material and an Sr material for secondary melting for 10-15min after the Al material is melted into the liquid state.
In some embodiments, the temperature of the smelting, the primary smelting and the secondary smelting is equal to 750-.
In some embodiments, the second smelting is to add the mixed materials into the metal alloy liquid obtained by the first smelting by adopting a pressure-in method.
In the experimental research process, indigo dye polluted wastewater is prepared as a research object, and an electrochemical method is adopted to treat the indigo polluted wastewater. The original COD of the indigo wastewater prepared thereinCrIt was 3785mg/L, and the chroma value was 2439. The reason why the dye-polluted wastewater prepared by adopting the indigo dye is used as a research object is as follows: the indigo dye has high chemical oxygen demand and high fading difficulty, and has higher treatment difficulty after the wastewater is polluted compared with other pollutants. The invention is created in the course of research according to the following test procedures and methodsThe following steps are carried out:
(1) preparation of quaternary alloy anode plate material
Putting a lead raw material into a graphite crucible, heating and melting, adjusting the temperature to between 750 and 850 ℃, carrying out primary smelting treatment, adding aluminum and carbon powder accounting for 1.8 percent of the mass of the metal liquid into the lead raw material according to the weight content of 1.2 to 2.7 percent in the primary smelting treatment process so as to ensure that the lead raw material is completely smelted into the metal liquid, controlling the smelting temperature to be unchanged, mixing the calcium and strontium raw materials according to the weight content of 0.1 to 0.28 percent and the weight content of 17 to 19 percent respectively, adding the mixture by adopting a pressing-in method, stirring the mixture for secondary smelting treatment for 10 to 15min, casting the mixture into ingots, forging and rolling, and punching to obtain the anode plate electrode material. In the above preparation process, other matters may be treated by referring to the preparation treatment method in the prior art, and the operation is carried out by referring to the related technology in the field, for example: the calcium and strontium materials are added by the pressing method, and the processing can be carried out by referring to the operation method in the preparation flow of the related quaternary alloy anode plate such as PbAgCaSr and the like.
In the operation process of the preparation method, the following precise adjustment and change are performed on the parameters in the preparation process of the quaternary alloy anode plate material, and then different quaternary alloy electrode materials are prepared, specifically as shown in the following table 1:
TABLE 1
The hardness, tensile strength and resistivity of the samples prepared in table 1 were measured, and the results are shown in table 2 below:
TABLE 2
The data in the table 2 show that the performance of the prepared quaternary alloy electrode material can be greatly influenced due to different addition amounts of the raw material components, and the hardness and the tensile strength can be effectively enhanced and the resistivity can be reduced within the addition amount range selected by the invention; in order to further verify the influence of the process steps in the quaternary alloy preparation process in the inventive operation method, the researchers based on the prepared sample 5 and adjusted the preparation process steps as follows:
test products: sample 5;
comparison products: the preparation is carried out according to the preparation method of the sample 5, and the calcium and strontium raw materials are added in the preparation process according to a conventional addition method without adopting an indentation method.
The hardness, tensile strength and resistivity detection method created by the invention is adopted to detect the reference substance, and the result shows that: the hardness of the control was 14.98Hv and the tensile strength was 5.47kg/mm2The resistivity was 0.216. omega. mm. In conclusion, in the preparation process, whether the calcium and strontium raw materials are added by adopting the pressing method or not will greatly influence the quality of the prepared sample. The pressing-in method can be operated by referring to the related press-in method in the prior art and other chemical raw material feeding methods.
In order to have better electrochemical performance and enhance the comprehensive performance of the quaternary alloy electrode material, the researchers correspondingly adjust the process parameters of the preparation method of the sample 5 and detect the corresponding hardness, tensile strength and resistivity of the sample on the basis of the preparation method of the quaternary alloy material in the preparation and research process, and the results show that: prepared in the preparation method according to sample 5, when calcium is 0.23% by weight, aluminum is 2.5% by weight, strontium is 18% by weight, and the balance is lead, the quaternary alloy anode plate material of sample 8: the hardness is 22.34Hv, and the tensile strength is 7.43kg/mm2The resistivity is 0.157 omega mm; the quaternary alloy electrode material of sample 9 was obtained when calcium was 0.17 wt%, aluminum was 1.8 wt%, strontium was 17 wt%, and the balance was lead: the hardness of the alloy is 22.35Hv,tensile strength of 7.41kg/mm2The resistivity was 0.153. omega. mm.
(2) Experiment for electrolyzing indigo wastewater by using quaternary alloy material as positive electrode and graphite as negative electrode
The quaternary alloy anode plate material prepared by the preparation method is used as the anode and graphite is used as the cathode to electrolyze indigo wastewater, and the specific test operation process is as follows:
the composition of the electrolyzer, as shown in Table 3 below, was measured during electrolysis: performing bimetal assisted electrolysis according to the mixing of Fe/Al with the mass ratio of 1:1, controlling the pH value of the wastewater to be 5, the electrolysis voltage to be 10V, the electrolysis time to be 50min and the current density to be 0.1A cm-2。
TABLE 3
The data in table 3 show that different raw material compositions of the quaternary alloy anode plate material can affect the COD removal and the decolorization capacity to different degrees when the quaternary alloy anode plate material is used for electrolyzing organic wastewater, and the anode plate (anode) is prepared by adjusting the raw material composition of the quaternary alloy material and combining the preparation process of the quaternary alloy anode plate material, so that the anode plate can be used for electrolyzing indigo wastewater, the COD content can be effectively reduced, and the decolorization rate can be improved.
In addition, on the basis of the above test group 8, the present investigators conducted research tests on the influence of the current density range, electrolysis time, pH value, etc. on the COD removal rate during the experiment, and the results are shown below:
current density: the test range is from 0.1A cm-2According to 0.01 A.cm-2The incremental amplitude of the test table is gradually increased, and the COD removal rate is tested, and the result shows that: at a current density of 0.1-0.2A cm-2Between the rangesThe COD removal rate gradually increased and the rate increased with the increase of the current density, and the current density increased to 0.2A cm-2In the above process, the increasing speed of the COD removal rate is gradually reduced, the electrolysis efficiency is obviously reduced, and the energy consumption is obviously enhanced and the loss rate of the electrode material is obviously increased along with the gradual increase of the current density; and the results of observing and detecting the decolorization condition of the organic wastewater in the test are shown as follows: at a current density of 0.1-0.2A cm-2The COD removal rate is gradually increased, the electrolytic efficiency is higher, the decolorization rate of the organic wastewater is higher, and particularly, the current density is 0.15A-cm-2In the process, the decolorization rate of the wastewater is highest and can reach about 99.6%, and the removal rate of COD is relatively high and is maintained at about 85.1.
And (3) electrolysis time: adopting multiple times of electrolytic treatment, measuring the amplification condition of the COD electrolytic removal rate in different time periods, further measuring the electrolytic efficiency, and obtaining through tests: when the electrolysis time is within 35min, the COD removal rate shows a great rising trend, and when the electrolysis time reaches 40min, the COD removal rate is only maintained at about 84.1 percent, the electrolysis time is continuously prolonged, and the electrolysis electric energy consumption condition for prolonging the time is counted, and the result shows that: for the electrolysis for prolonging the period of time, the ratio of the COD removal rate increase value to the electrolysis electric energy consumption value is only 1-5% lower than that when the electrolysis time is 35min, and when the electrolysis time is prolonged to be more than 60min, the ratio of the COD removal rate increase value to the electrolysis electric energy consumption value is greatly reduced, so that a large amount of energy consumption is caused, and the acceleration change of the COD removal rate is poorer. Therefore, the electrolysis time is maintained within 60min, so that the electrolysis energy consumption is reduced, and the wastewater treatment cost is reduced. And according to the longer electrolysis time, the higher and higher COD removal rate, the following results are obtained: the electrolysis time should be controlled between 50-60 min.
pH value: the effect of the fluctuation in the range of 5 to 10 on the COD of the wastewater is not obvious; however, the reaction occurs in strongly alkaline waste water to rapidly generate Fe (OH)2And Al (OH)3Precipitation, which hinders the progress of the reductive degradation reaction; in acid stripsThe element is beneficial to the treatment of Fe/Al bimetal on organic matters, but the strong acid condition does not really help the continuous normal operation of an electrolysis system because the electrolysis method plays a leading role in the wastewater treatment, and the Fe in the wastewater under the strong acid condition2+The concentration is very high, the iron scrap surface is easy to be passivated, and the treatment effect is influenced, so that the treatment effect is relatively good when the Fe/Al bimetal assists the electrolysis method to treat the wastewater under the condition that the pH value is 5-10. Especially when the pH value is controlled to be 6, the COD removal rate and the decolorization rate are both high, the COD removal rate can reach more than 85%, and the decolorization rate reaches more than 99.3%.
In the above test process, the voltage is applied according to the voltage range applied in the routine test of the skilled person, for example, 1-30V, and the test of adjusting the corresponding voltage value range in the test process shows that the COD removal of the electrolytic wastewater is facilitated at 10-15V, and the two comparison tests of adding and not adding Fe/Al bimetal are performed by controlling the voltage at 10-15V in the voltage adjustment process, and the two comparison tests of adding and not adding Fe/Al bimetal are performed under the same voltage control of 1-10V, 15-30V, etc., and the results show that: in the process of changing between 1-10V and 15-30V, the effect of removing the COD by adding or not adding the bimetal to assist the electrolytic treatment is not greatly influenced; in the process of controlling the voltage to change between 10 and 15V, the COD removal rate effect of adding the bimetal to assist electrolysis is better than that of not adding the bimetal to assist electrolysis treatment, and the removal rate can be obviously increased; therefore, the Fe/Al bimetal assisted electrolysis of the wastewater to remove COD can be facilitated by controlling the voltage to be between 10 and 15V.
(3) Bimetal assisted electrolysis indigo blue wastewater test with different Fe/Al addition ratios
On the basis of the test group 8, the researchers add different mixing mass ratios of Fe/Al into the electrolysis system according to the test mode of the test group 8 to form bimetal-assisted electrolysis of indigo polluted wastewater, and detect the COD removal rate and the decolorization rate of the electrolysis indigo polluted wastewater with different addition mass ratios, and the results are shown in the following table 4:
TABLE 4
As shown by the data in Table 4, for the Fe/Al bimetallic-assisted electrolysis process, the addition of the Fe/Al mixing ratio has different effects on the COD removal rate, and it is obvious that: the COD removal rate is better when the addition ratio is controlled to be between 1:0.2 and 0.8, and the influence degree on the decolorization rate is not large.
In the research process, the researchers add carbon powder into a graphite crucible, which can effectively cover the surface of a molten liquid, so that the molten metal is isolated from air, and the air suction and oxidation burning loss of the alloy are reduced, however, under the condition of different added amounts of the carbon powder, the downward-pressing gravity of the carbon powder covering the surface of the molten liquid is completely different, so whether the surface of the molten liquid can be covered right or not is not, and the carbon powder is not easy to extrude into the molten liquid under the action of self gravity, which can be a key factor influencing the comprehensive performance index of an anode plate, therefore, in the process of preparing the anode plate, the researchers add the carbon powder, and the added amounts are subjected to the following adjustment tests, and the comprehensive performance indexes of samples obtained by corresponding test groups are detected, and the results are shown in the following table 5:
table 5 the test was carried out on the basis of the preparation of sample 8 described above.
As shown in the data in Table 5, different amounts of the added carbon powder can affect the comprehensive performance of the prepared anode plate product to different degrees, and the amount of the added carbon powder is controlled within a reasonable range of 1.2-2%, so that the method is favorable for improving the comprehensive performance quality of the anode plate, reducing the resistivity and improving the tensile strength and hardness.
In the invention, the amount of the carbon powder added is measured by the mass of the molten Pb, and the amount of Al, Ca, Sr and the like is measured by the total weight of the quaternary alloy.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. The application of carbon powder in the preparation of a quaternary alloy anode plate is characterized in that the carbon powder which accounts for 1.2-2% of the mass of liquid obtained by melting is added into a material which is Pb, Al, Ca and Sr and is used as a raw material before the primary melting, the secondary melting, the stirring and casting into ingots, the forging and rolling and the punching are carried out to prepare the quaternary alloy anode plate;
the melting is to heat and melt a Pb material into a liquid state in a graphite crucible, then add an Al material for primary melting, and after the Al material is melted into the liquid state, add a mixed material of a Ca material and a Sr material for secondary melting for 10-15 min;
the calcium accounts for 0.23 percent of the weight, the aluminum accounts for 2.5 percent of the weight, the strontium accounts for 18 percent of the weight, and the balance is lead; or the calcium accounts for 0.17 percent by weight, the aluminum accounts for 1.8 percent by weight, the strontium accounts for 17 percent by weight, and the balance is lead.
2. The use of carbon powder in the preparation of quaternary alloy anode plates according to claim 1, wherein the amount of carbon powder added is 1.5-2% of the mass of the liquid state obtained by melting.
3. The use of carbon powder in the preparation of quaternary alloy anode plates according to claim 1, wherein the amount of carbon powder added is 1.8% of the mass of the liquid state obtained by melting.
4. The use of carbon powder in the preparation of a quaternary alloy anode plate according to claim 1, wherein the temperature of the smelting, the primary smelting and the secondary smelting is equal to 750-.
5. The application of the carbon powder in the preparation of the quaternary alloy anode plate according to claim 1, wherein during the secondary smelting, the mixed material is added into the metal alloy liquid obtained by the primary smelting by adopting a pressing method.
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