... productivity indirect method and direct method zinc oxide industrial and feed grade indirect method and direct method zinc oxidewe are ... productivity, both direct and indirect processing method in general grade, Ceramic grade and enamel . We can produce 150mts/15 days, ... indirect method and direct method zinc, industrial and feed grade80%,85%,90%,92%,95%,96%, 97%,98%,99%,99.5%, 99.7%, 99.8%, 99.9%