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铝具有一系列独特的性能,在国民经济的各部门中获得了广泛的应用,尤其是在当前世界性的能源短缺情况下,由于它的比重小与回收率高,铝材已成为一种节能的材料,所以尽管由铝矾士冶炼成原铝每吨约耗电2万度,而由原铝加工成铝材,在我国当前情况下,每吨也约耗电三千多度,但是各个工业部门的铝材用量仍以相大的比例增长,尤其是能源消耗大的部门.例如日本,在1970年到1980年期间,交通运输业用铝量的年平均增长率为8.5%,建筑与结构工业的为9.4%,包装工业的为12.7%,而全国的平均年增长率为6.9%.
Aluminum has a range of unique properties that have found wide application in various sectors of the national economy, especially in the current worldwide energy shortages, due to its small weight and high recovery rate. Aluminum has become an energy-saving Therefore, although aluminum smelting into primary aluminum consumes about 20,000 kWh of electricity per tonne and the primary aluminum is processed into aluminum, the current situation in our country consumes about 3,000 tons of electricity per tonne, In the industrial sector, the amount of aluminum used is still growing at a large proportion, especially in energy-intensive sectors such as Japan, where the average annual growth rate of aluminum in the transportation industry was 8.5% between 1970 and 1980, 9.4% for the structural industry and 12.7% for the packaging industry, while the national average annual growth rate was 6.9%.