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人们以常用的方法确定矿石自磨条件,每次需约10吨样品,在最小直径为1500毫米的试验自磨机中磨矿。研究者们认为由于下列原因非常不经济:1)从矿床取大量样品需昂贵费用;2)取得的样品需运到远离该矿体的试验地,并需要建立一试验室;3)需要进行大量的试验以保证自磨工厂的设计,适应处理该矿床的矿石。由于上述原因,研究者寻找出一种磨少量矿样来预测自磨条件的方法,该法如同确定常规磨矿条件那样简单,并可以得到比几个分散取的大样更完整的矿石可磨度变化数据。美国Aerofall Mills研究出了磨少量样品直径为450毫米的干式自磨机,来预测工业泻落式自磨机的自磨条件。加拿大Bechtel公司也研究了直径为450毫米的自磨机和现有的湿式自磨机之间的相互关系。现将试验工作简述如下:
People commonly used methods to determine the self-grinding ore conditions, each takes about 10 tons of samples, the smallest diameter of 1500 millimeters test self-grinding mill. Researchers think it is uneconomical for the following reasons: 1) it takes expensive to get a large number of samples from the ore deposit; 2) the samples taken must be transported to the test site far away from the ore body and need to establish a laboratory; 3) Test to ensure that the design of self-grinding plant, adapted to deal with the ore ore. For the above reasons, the researchers sought a method of grinding a small amount of ore to predict the condition of self-grinding, which is as simple as determining the conventional grinding conditions and allows for a more complete ore grind than a few large samples Degree of change data. Aerofall Mills of the United States has developed a dry self-grinding mill with a small sample diameter of 450 mm to predict the self-grinding condition of industrial dipping self-grinding mills. Bechtel Canada also studied the correlation between a 450 millimeter diameter self-mill and an existing wet self-mill. Now the experimental work is as follows: