Geneva: China has appealed against a World Trade Organisation (WTO) ruling that it illegally restricted exports of key raw materials, the global trade body said on Thursday.

"China notified the Dispute Settlement Body, which consists of all WTO members, of its decision to appeal the panel reports," the WTO said.

"The Appellate Body has up to three months to conclude its report," it said.

The appeal is against a WTO decision reached in July which upheld complaints by the United States, European Union and Mexico, that China had failed to abide by accession commitments when it imposed quotas and duties on several types of mineral exports.

The complainants charged that export quotas and duties imposed by Beijing on the raw materials were illegal and against commitments China made when it joined the world trade body.

The July 5 WTO ruling applies to elements including bauxite, coking coal, fluorspar, magnesium, manganese, silicon metal, silicon carbide, yellow phosphorus and zinc, all key industrial materials.