近年来,美国重晶石生产处于下降状态,但1987年美国重晶石的产量比1986年增加了15.8%,消耗量增加了6.9%。由于美国重品石产量增加,导致重晶石的进口量明显下降,198了年美国重晶石进口量比1986年下降了19.5%。据美国矿业局报道,1 987年世界重晶石产量下降了13%。美国重晶石生产、进出口量和消耗量见 In recent years, barite production in the United States has been declining. However, in 1987, the production of barite in the United States increased by 15.8% over 1986, and consumption increased by 6.9%. Due to the increase in the production of heavy stone in the United States, the import of barite decreased significantly. In 198, the import of barite in the United States decreased by 19.5% from 1986. According to the US Bureau of Mines, world barite production dropped by 13% in 1987. US barite production, import and export volume and consumption see