Date: Thu, 20 Nov 1997 22:37:59 GMT Server: Stronghold/1.3.4 Ben-SSL/1.3 Apache/1.1.3 Content-type: text/html Content-length: 3655 Last-modified: Wed, 12 Nov 1997 15:03:40 GMT
In dezincing, the scrap metal starts off as either bales or clips. From here the metal is sent through a shredder to form it into hand size balls of scrap. The scrap is transported to the feed conveyer by a front end loader. It travels along the feed conveyer to the feed slide where it enters the dezincing tank.
The dezincing tank, where the zinc is dissolved, can be considered the largest alkaline battery in the world. The zinc coated scrap passes through a rotary reactor submerged in a caustic solution and as the zinc dissolves, a solution of sodium zincate is formed.
The dezinced steel scrap is washed with water to remove the last traces of zinc solution. The zinc free black scrap is discharged to a stockpile. The technology can treat galvalume, oily, painted and otherwise dirty scrap which will give you the operating flexibility you need.
The proprietary electrowinning system removes the zinc from the zinc rich solution by electrolysis and regenerates the caustic concurrently for reuse in the dezincing tank. The zinc is grown on plates as a powder which is further treated for reuse in galvanizing lines or sold to specialized zinc powder markets.