Preparation method of lead-based multi-element alloy anode material for high-strength anticorrosive electrolytic manganese
A multi-element alloy and anode material technology, applied in the direction of electrodes, electrolytic components, electrolytic process, etc., can solve the problems of anode plate creep, anode failure, low strength, etc., to improve service life, easy operation, improve mechanical strength and durability corrosive effect
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[0016] The preparation method of the lead-based multi-component alloy anode material for high-strength corrosion-resistant electrolytic manganese of the present invention comprises the following steps:
[0017] (1) Preparation of lead-based composite modifier: adopt high-energy ball milling composite method or liquid phase composite method to prepare lead-based composite modifier, described lead-based composite modifier is lead-arsenic, lead-silver, lead-strontium, lead-selenium, lead-sulfur, One or more of lead aluminum, lead bismuth, lead calcium, lead zirconium, lead manganese, lead silicon, lead barium, lead titanium, lead bismuth salt, lead rare earth, lead carbon nanotube, lead graphene, lead-based composite The modificator is composed of 10% lead and 90% modificant in parts by mass. The high-energy ball mill compounding method refers to mechanically compounding the powdery modifier and lead powder by using a high-energy ball mill under the protection of argon, wherein t...
Embodiment 1
[0023] (1) Preparation of lead-arsenic composite modifier: Weigh 0.5 kg of metallic arsenic powder with an average particle size of 50 μm, place it in 1 g / L PVP aqueous solution, stir and react for 10 minutes, filter the supernatant, and put the modified The metal arsenic powder was dried in a vacuum oven at 40°C for later use, and 0.1kg of the modified metal arsenic powder was placed in 10L electroless lead plating solution (the specific composition refers to 25g / L lead nitrate, 10g / LEDTA, 4g / L formaldehyde) , react for 60 minutes, filter and dry to obtain a lead-arsenic composite modifier with 90% arsenic content;
[0024] (2) Melting of lead-tin-antimony alloy: set the temperature of the vacuum melting furnace at 200°C, add a small amount of charcoal and then bake the furnace to keep the crucible in the melting furnace dry and free of other impurities. After the furnace is baked for 1 hour, set the furnace The temperature is 350°C and the vacuum degree is 0.6MPa. According ...
Embodiment 2
[0029] 1. Preparation of lead-graphene composite modifier: Weigh 0.5 kg of graphene powder with an average particle size of 1 μm and 0.056 kg of lead powder with an average particle size of 1 μm, place them in a high-energy ball mill at the same time, feed nitrogen protection, and the ball mill speed 2500RPM, ball milling time is 120min;
[0030]2. Melting of lead-tin-antimony alloy: set the temperature of the vacuum melting furnace at 200°C, add a small amount of charcoal and then bake the furnace to keep the crucible in the melting furnace dry and free of other impurities. After the furnace is baked for 1 hour, set the furnace temperature The temperature is 350°C and the vacuum degree is 0.6MPa. According to the calculation of melting 25kg of lead-tin-antimony alloy (Pb-1.0%Sn-0.5%Sb), add 24.625kg of pure lead in the furnace. After most of the solid lead is melted, Add the prepared 0.25kg tin and 0.125kg antimony into the melting crucible, set the furnace temperature to 500...
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