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目前,国外缩减了新建选矿厂的数量。美国和加拿大许多大型公司工作负荷仅为装机容量的75%。某些金属的主要生产者的地理位置也发生了变化。例如,加拿大镍精矿的产量急剧下降(降低到25%),而澳大利亚镍精矿的产量却有增加。铜精矿、铅精矿、钨精矿、镍精矿和钼精矿的产量有所减少。较贫矿物原料处理量的增加,所采矿床矿山地质条件的恶化,电能、原材料、药剂价格
At present, the number of newly-built beneficiation plants has been reduced abroad. The workloads of many large corporations in the United States and Canada are only 75% of installed capacity. The geographical location of some of the major producers of metals has also changed. For example, production of Canadian nickel concentrates has dropped sharply (down to 25%), while production of Australian nickel concentrates has increased. Copper concentrate, lead concentrate, tungsten concentrate, nickel concentrate and molybdenum concentrate production decreased. Increased throughput of poorer mineral raw materials, deteriorating geology of mining mines, electricity, raw materials, pharmaceutical prices