The recovery process is the world's most advanced methods of gold, Yongxing, Hunan, Guangdong Qingyuan, Shanghai, Zhejiang, Fujian, Putian, China Taiwan has been widely applied, the recovery rate as high as 99%, to extract the gold bullion high purity (≥ 99.6%), simple technology, high recovery rate, easy process. Gold plating layer is mainly used for retirement - recovery of gold. Apply to recycling smelting company (especially circuit boards scrap gold, cheat recovery), electroplating plants (including electronic circuit board plating gold, Immersion gold).

 

The necessary materials and chemicals:

 

1, sulfuric acid, sodium hydroxide, zinc wire (Bont), BT-off powder (Bont), sodium cyanide (K).

2, funnel, rapid filter paper, steel cup (high temperature), sophisticated PH test paper (1-14) or electrolytic gold machine.

 

Recycling Process:

 

1, first gold piece into the match off a good solution (1KG plus 8 grams of water and 30 grams of sodium cyanide powder off), when all the gold coating after stripping, and then the workpiece until golden.

2, when the gold back again after the gold content of the solution reached saturation, with diluted hydrochloric acid or sodium hydroxide regulate PH value, this process is best carried out in the kitchen ventilation, and wear a gas mask, the operator should pay attention to safety.

3, then add the electrolytic recovery of zinc or direct. Add the zinc powder, please note that many should be added slowly, stirring added edge.

4, standing to the solution of the upper clear liquid, then drained or removed by siphon on the part of the liquid, and finally to the bottom with filter paper filter. Then filtered from the black sponge slag shall be a mixture of gold and zinc.

5,6,7,8 four steps are company secrets, who bought off in Bonthe Jinshui powder or off more customers will have free flow.

9, Bonthe, and provision of free advice, if the amount of large, companies can free of charge to help guide professional engineers of gold refiner.