Method for preparing zinc from zinc plating ash
A technology for alkalizing zinc and activating zinc powder is applied in the field of post-treatment of hot-dip galvanizing, which can solve the problems of high process energy consumption, unfriendly environment, and high dechlorination cost, achieve high reduction efficiency, high reduction purity, and improve recovery rate. Effect
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Embodiment 1
[0035] In this embodiment, galvanized dust is made into activated zinc powder, please refer to figure 1 As shown, the specific implementation process is as follows:
[0036] Process S1: Weigh the galvanized ash and add it to the pulverizer, dry-grind the galvanized ash, and sieve the pulverized material with a 20-mesh screen until all the powder is passed through the screen to obtain the mother powder, and weigh 100kg of the mother powder , 5kg of sodium carbonate and 1.2kg of sodium alginate were added to the mixer and mixed evenly, and then slowly added to the grinder through a feeder, and at the same time, 30L of water was slowly added to the grinder for wet grinding, and the grinding slurry was passed through an 80-mesh sieve. Filter, collect and grind in a stirring tank, stir and react at 60rmp for 18 hours, then heat the grinding slurry to 85±5°C and filter it with a 150-mesh screen while it is still hot. The filtrate can be returned to grinding and used, and the filter ...
Embodiment 2
[0040] In this embodiment, galvanized dust is made into activated zinc powder, please refer to figure 1 As shown, the specific implementation process is as follows:
[0041] Process S1: Weigh the galvanized ash and add it to the pulverizer, dry-grind the galvanized ash, and sieve the crushed material with a 20-mesh sieve until all the powder passes through the sieve to obtain the mother powder, and weigh 100kg of the mother powder , 10kg of sodium carbonate and 1.5kg of sodium alginate were added to the mixer and mixed evenly, and then slowly added to the grinder through a feeder, and at the same time, 40L of water was slowly added to the grinder for wet grinding, and the grinding slurry was passed through an 80-mesh sieve. Filter, collect and grind in a stirring tank, stir and react at 60rmp for 24 hours, then heat the grinding slurry to 85±5°C and filter it with a 150-mesh screen while it is still hot. The filtrate can be returned to grinding and used, and the filter cake is...
Embodiment 3
[0044] This embodiment prepares the reduction core ball, please refer to figure 1 and figure 2 As shown, the specific implementation process is as follows:
[0045] Weigh 6.67kg of carbon powder, 6.67kg of zeolite powder and 660g of calcium fluoride and put them into a stirrer to stir and mix to make a composite reducing agent;
[0046] Take the activated zinc powder and the composite reducing agent, use water as the binder, and use the ball forming disc to continuously granulate to obtain the reduced core ball. The specific process is as follows:
[0047] 1) Take 3kg of composite reducing agent and add it to the disc granulator, turn on the disc granulator and spray atomized water from above until the composite reducing agent is bonded to each other to form small granular inner balls;
[0048] 2) Take 100kg of activated zinc powder prepared in Example 1 and divide it evenly into three parts, transfer the inner ball into the second disc granulator, spray atomized water on t...
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Abstract
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