Aluminium and other metal smelting industries are also facing substantial short-term production problems because of the weather .
炼铝和其它金属冶炼行业也因为天气而面临严重的短期生产问题。
Chinese metallurgists are responsible for the earliest variants of iron and steel smelting processes ( 5th century b.c. ) .
中国冶金学家是最早发明各种钢铁冶炼工艺技术的人（公元前五世纪）。
However concerns that china might flood the market as a result of investment in smelting capacity have not come to pass .
市场曾担心，中国在铝冶炼产能上的投资，可能让铝供过于求，但这一担心并未成为现实。
Earlier this week , state media reported protesters had broken into a smelting works they blamed for the lead poisoning of hundreds of children in northwestern shaanxi province .
