近年.美国的纯氦生产和消费有了大幅度的增长,A种氦(纯度达99.95％)从1982年的3525万m~3增加到了1986年的5660m~3,纯氦的消费也从1982年的2455m~3增加到1986年的4470m~3.出口量从1070万m~3增加到1200万m~3(表1)。1986年美国有8家工厂从天然气中提取纯氦,另外4家工厂是从含氦70％的原氦中提取。在堪萨斯州和得克萨斯州有11座氦工厂,在墨西哥州有1座。这些工厂的任务是加工处理当地已开采多年濒于枯竭气田中的天然气。到了80年代,堪萨斯州和得克萨斯州的氦工厂 In recent years, the production and consumption of pure helium in the United States have increased substantially. The A helium (purity of 99.95%) has increased from 35.25 million m 3 in 1982 to 5660 m 3 in 1986, and the consumption of pure helium has also increased from 1982 The year of 2455m ~ 3 increased to 4470m ~ 3 in 1986. The export volume increased from 10.7million m ~ 3 to 12 million m ~ 3 (Table 1). In 1986, eight factories in the United States extracted pure helium from natural gas and the other four factories extracted from the original helium containing 70% of helium. There are 11 helium plants in Kansas and Texas, and 1 in Mexico. The task of these plants is to process natural gas that has been mined in the field for many years in the depleted gas field. By the 1980s, helium factories in Kansas and Texas