作为金精矿的含金硫精矿一般要求含金在80(克/吨)以上。然而矿山往往还产出一部分含金较低的硫精矿,其品位在10—20(克/吨)之间。这部分精矿若应用某些方法,如氰化法、硫脲法、氯化法、碘化钾浸出法、压热氧化法等直接提金,在技术经济上不合理,如作为冶炼配料则会降低主产品冶金炉利用系数,亦增加渣量。这部分精矿售价低,往往滞销。如能用机械选矿方法选 As a gold concentrate containing sulfur ore generally require gold at 80 (g / ton) above. However, the mines often also produce some of the lower gold concentrate containing pyrite, which is in the grade of 10-20 (g / t). This part of the concentrate if the application of certain methods, such as cyanide, thiourea, chlorination, potassium iodide leaching, autoclaving and other direct gold, technically and economically unreasonable, such as as a smelting ingredients will be reduced Main product metallurgical furnace utilization factor, also increase the amount of slag. This part of the concentrate price is low, often unsalable. If you can use mechanical dressing method