A kind of method for preparing anode plate from gold anode slime
A technology of anode slime and coarse gold, which is applied in the direction of electrodes, instruments, electrolytic components, etc., and can solve the problems of easy loss of gold and silver, difficulty in forming anode plates, etc.
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Embodiment 1
[0033] Step 201, prepare 20L of ammonia solution containing 10% ammonia, add 5Kg of anode slime to the ammonia solution and keep stirring for 4 hours, so that AgCl in the anode slime is fully dissolved. Filtrate under a fume hood, wash and dry the filtered gold powder to obtain coarse gold powder;
[0034] Step 202, weighing 4Kg of coarse gold powder and putting it into a ball milling jar, and adding 2.5 wt.% solid paraffin into the ball milling jar as a molding agent. The diameters of the ceramic balls used for ball milling are 5mm, 8mm and 10mm respectively, and the ratio of ceramic balls to coarse gold powder is 3:1. Finally, the ball mill jar is symmetrically installed on the planetary ball mill for ball milling, the ball milling speed is 200 rpm, and the ball milling time is 8 hours to obtain fine gold powder;
[0035] Step 203, put the ball-milled fine gold powder in a drying oven for drying, the temperature of the drying oven is set at 80° C., and the drying time is 4 ...
Embodiment 2
[0040] Step 301, preparing 8L of ammonia solution containing 10% ammonia, adding 2Kg of anode slime to the ammonia solution and stirring for 4 hours, so that AgCl in the anode slime is fully dissolved. Filtrate under a fume hood, wash and dry the filtered gold powder to obtain coarse gold powder;
[0041] Step 302, weighing 1.6Kg of gold powder and putting it into a ball mill jar, and adding 2.5wt.% solid paraffin into the ball mill jar as a molding agent. The diameters of the ceramic balls used for ball milling are 5mm, 8mm and 10mm respectively, and the ratio of ceramic balls to coarse gold powder is 3:1. Finally, the ball mill jar is symmetrically installed on the planetary ball mill for ball milling, the ball milling speed is 200 rpm, and the ball milling time is 8 hours to obtain fine gold powder;
[0042] Step 303, put the ball-milled fine gold powder in a drying oven for drying, the temperature of the drying oven is set at 80° C., and the drying time is 4 hours. After c...
Embodiment 3
[0047] Step 401, preparing 10L of ammonia solution containing 10% ammonia, adding 2.5Kg of anode slime to the ammonia solution and stirring for 4 hours to fully dissolve AgCl in the anode slime. Filtrate under a fume hood, wash and dry the filtered gold powder to obtain coarse gold powder;
[0048] Step 402, weighing 2Kg of gold powder and putting it into a ball mill jar, and adding 2.5 wt.% solid paraffin into the ball mill jar as a molding agent. The diameters of the ceramic balls used for ball milling are 5mm, 8mm and 10mm respectively, and the ratio of ceramic balls to coarse gold powder is 3:1. Finally, the ball mill jar is symmetrically installed on the planetary ball mill for ball milling, the ball milling speed is 200 rpm, and the ball milling time is 8 hours to obtain fine gold powder;
[0049] Step 403, putting the ball-milled fine gold powder in a drying oven for drying, the temperature of the drying oven is set at 80° C., and the drying time is 4 hours. After coo...
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