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前面讲过在调节闭路磨矿时,除给矿量、磨矿浓度需要进行调节外,还需对返砂量进行调节。当返砂量为被调参时,它的调节参数是新给矿量。在返砂量低于给定值时,说明磨矿机生产能力有剩余,应增加给矿量,以充分发挥其生产能力。反之,返砂量大于给定值,就容易出现“胀肚”等现象,则需减少给矿量。这就是说,在生产过程中,给矿量的大小,要根据返砂量的偏差值来给定。以前所介绍的各种比值调节系统方案中,主物料的给定值,有的是固定不变的,或者是任意的,因此,都不能满足闭路磨矿循环自动调节的要求。这个任务,要由串级、比值组合调节系统来完成。串级、比值调节系统的特点是在解决比值调节任务之前,采
As mentioned earlier in the regulation of closed-circuit grinding, in addition to the amount of ore, grinding concentration needs to be adjusted, the amount of sand returned need to be adjusted. When the amount of returned sand is adjusted, its adjustment parameter is the amount of new ore. When the amount of sand returning is lower than a given value, it shows that there is surplus in the production capacity of the mill, and the amount of ore to be mined should be increased to give full play to its production capacity. Conversely, back to the amount of sand is greater than the given value, it is prone to “bloating” and other phenomena, you need to reduce the amount of ore. This means that in the production process, the amount of ore to be given, according to the amount of back to the amount of sand to give bias. The previously described various ratio adjustment system solutions, the given value of the main material, some are fixed or arbitrary, therefore, can not meet the requirements of automatic closed loop grinding cycle requirements. This task, to be cascade, ratio control system to complete the composition. Cascade, ratio adjustment system is characterized by the ratio adjustment task before mining