据国外期刊报导,去年,美国统计总署根据美国矿山局提供的情报认为:佛罗里达磷酸盐储量有22亿吨,足够今后开采20年。统计总署仅把产品成本不超过15美元/短吨的资源算作储量,而实际预测未来的生产成本将有所提高,如果把可用常规采选工艺经济合理回收的磷酸盐产品的生产成本提高到 According to foreign journals, last year, according to information provided by the U.S. Bureau of Mines, the United States Statistics Bureau estimated that there are 2.2 billion tons of phosphate reserves in Florida, enough for 20 years of mining in the future. The statistics department only counted resources with a product cost of not more than US $ 15 per short ton as reserves, but actually predicted future production costs will be increased. If the production cost of phosphate products that can be economically and reasonably recovered by the conventional mining process is increased To