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1977年日本铜产量为92.9万吨,仅次于美国和苏联,居世界第三位。1974年铜产量最高达99.6万吨。1976年铜产量与钢产量之比为0.8％。一般工业发达国家铜与钢之比为1.2％,因此,每年都要进口一部分铜以满足国内需要。1977年日本铜消耗量达1_07.6万吨,仅次于美国和苏联,居世界第三位。日本是世界上火法炼铜技术发展比较全面的国家,有九个公司,十一个粗炼厂,年生产能力达
Japan’s copper output in 1977 was 929,000 tons, second only to the United States and the Soviet Union, ranking third in the world. In 1974, copper production reached 996,000 tons. In 1976, the ratio of copper output to steel output was 0.8%. In general, the ratio of copper to steel in industrialized countries is 1.2%. Therefore, a portion of copper is imported each year to meet domestic needs. Japan’s copper consumption in 1977 amounted to 1_076.6 thousand tons, second only to the United States and the Soviet Union, ranking third in the world. Japan is a relatively comprehensive country in the world in pyrotechnic copper technology. There are nine companies and 11 crude smelters, with an annual production capacity of over