Wenzhou alum mine is the only natural green products --- the production of potassium alum manufacturers, known as "the world's alumina," said, so far, more than 600 years of history. Mine was established in 1956, the restructuring of state-owned mining enterprises, after nearly 50 years of construction, a Central Purchasing, refining, building materials production in one type in a joint mining enterprises, the state eighteen one key chemical mines. Mining area of ??12 square kilometers, alunite world's proven reserves of alunite mine first, the State Council included in the "country's largest 50 companies with the industry" and in 1998 passed the ISO9002 international quality certification, the same year the import and export from franchise. Main Product "star" brand potassium alum, and a.. (more>>)