'Gold-containing waste includes fine gold, gold salt, gold water, gold wire, gold sludge, gold plating wastewater, gold plating scraps, gold plating thimble pins, gold plating flexible circuit boards, gold plating on copper, gold plating mobile phone boards, sludge from electroplating plants, gold depleted water, Silver welding wire, silver welding rod, silver paste, silver polishing cloth, silver paste empty bottle and other waste products
Recycling Senju solder paste