We use a technique that is unique in the world to produce recycled zinc oxide from electric furnace dust.

This zinc oxide manufacturing process produces zinc oxide through a direct method using electric furnace dust as the main raw material. The characteristic feature is that the commercial product is manufactured directly. We promote material recycling from "urban mines" as a bridge between electric furnace manufacturers and zinc oxide users. Our Onahama Smelter and Refinery prides itself on having an earth-friendly environmental preservation process that makes optimal use of non-ferrous smelting technology. We will continue to make improvements with the aim of improving product quality.

Zinc Oxide

Compositional Standards

	TOHO ZINC standards	JIS K1410 standards
	Direct method (American method)
	Class 3	Class 1	Class 2	Class 3
Appearance	-	White	White	-
Loss on drying	0.3 or less	0.3 or less	0.3 or less	0.3 or less
Purity	99.0 or more	99.5 or more	99.5 or more	99.0 or more
Water-soluble matter	0.5 or less	0.1 or less	0.1 or less	0.5 or less
Pb (%)	0.20 or less	0.005 or less	0.03 or less	0.3 or less
Cd (%)	0.004 or less	0.002 or less	0.01 or less	0.1 or less
Residue on sieve (%)	0.1 or less	0.1 or less	0.1 or less	0.1 or less
TOHO ZINC brand	Ginrei R