We are exporting zinc ash 30% and 40%,Millscale with a big quantity 67-72%Iron sludge 53%Iron sludge 63%Iron sludge 65-68%Iron slag fine grade:65%Mill slag:73% and 90% upCu ash 43%+Zn 40%Nickle slag:10% Minimum with big quantity.Al dross and skimming.Ony waste meatls we are exporting and importing manufacturing for a long times.