Recovery of alloy from Ferrochrome Slag,Ferrochrome recovery

Ferrochrome  smelting slag processing line is mainly to recover the valuable ferrochrome alloys from the slag in a forms that will be  as far as possible directly saleable. This production line is now producing saleable ferrochrome containing less than 2% slag at a recovery of over 96% of liberated metal.  For this processing line, not only the smelting alloy can be recovered, but also the final slag can be recycled. Here we share some process technology about ferrochrome smelting slag.

The following is a picture about recycling of smelting slag. The upper one is about the raw smelting slag and the left lower one is the fine ferrochrome alloy while the right lower one is the coarse ferrochrome alloy granules:

Specific gravity of ferrochrome alloy is much bigger than that of slag, so gravity separation will be the ideal and high efficient way to get the alloy granules attached to the smelting slag. Gravity separation mainly separates useful minerals or metals on basic of specific gravity difference between minerals or metals and wastes. The bigger the difference is, the better the efficiency will be. Both fine ferrochrome alloy and coarse alloy can be recovered by gravity separation machines.

Due to the price of coarse ferrochrome alloy is much higher than that of fine sand ferrochrome alloy, so here the gravity separation is able to get both fine and coarse alloy separately to meet the best profit for the owner. The general flow sheet to recover the ferrochrome alloy can be as below.

After rough crushing and fine crushing, all slag has been -30mm. This -30mm slag will be screened to be 0-8mm and 8-30mm, and slag of these two size ranges will go for down-driving jigger and AM30 jigger to get alloy granules of 0-8mm and 8-30mm. There shall be some fine alloy grains in the slag, so the tailings from the jiggers can be milled further and go for trapezoidal jigger for further recovery of fine alloy. The whole recovery rate can be +90%. The final tailings can be made of new-type building material to totally recycling the whole ferrochrome smelting slag.

We  have 20 years experience in building and operating slag processing plants for recovery of alloys from ferrochrome, ferromanganese or ferronickel slag. Our slag processing plants have been exporting to many countries like South Africa, Zimbabwe, Tanzania. We have a lot of examples of successful recovery of ferrochrome from slag.

Ferrochrome Slag Processing Site  in China

FerroChrome Slag processing site in Zimbabwe