应用铸铁段在金川磨矿中的节能降耗研究

在铸铁段用于金川磨矿的实践中,发现钢球更换为铸铁段后磨矿细度均有不同程度的提高,说明铸铁段对提高磨矿细度有利,而且铸铁段要求的磨机充填率低。在钢球作为磨矿介质时,球磨机的电单耗在32.54kW·h/t,而铸铁段作为磨矿介质时,球磨机的电单耗为30.87kW·h/t,降低了1.67个百分点。在钢球更换为铸铁段后最显著的变化是球耗,随着磨矿时间的增加,铸铁段消耗呈现逐渐降低趋势。

Study on energy saving and consumption reduction in jinchuan grinding by using cast iron section

in this paper, through the application of cast iron section in jinchuan grinding, it is found that the grinding fineness is improved to after steel ball is replaced with cast iron section, which indicates that cast iron section has a strong effect on improving the grinding fineness.After steel balls were replaced with cast iron sections, the overall medium change ratioS showed a decreasing trend after comparing the change trends of the former and the latter, and the grinding fineness remained basically unchanged. In other words, the grinding fineness required for cast iron sections was lower under the same grinding fineness products.When steel ball is used as grinding medium, the electrical unit consumption of ball mill is 32.54kw /t, while when cast iron is used as grinding medium, the electrical unit consumption of ball mill is 30.87kw /t, which reduces by 1.67 percentage points.The main reason for the decrease of power consumption is that the reduction of medium change ratioS leads to the reduction of the load of the grinding machine, so the power consumption of the grinding machine will be reduced.Another reason is that after the steel ball is converted to cast iron section, the actual sliding effect is weakened. Compared with the steel ball, the mutual friction force between cast iron sections is stronger than that of the steel ball, and the sliding effect is weakened, so the wastage is reduced.After the steel balls were replaced with cast iron sections, the most significant change was the ball consumption. After the addition of cast iron sections, the steel consumption presented a trend of gradual decrease with the increase of time.