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鲁基公司的铁矿床中,脉石和围岩的矿化成分非常复杂。某些常见的硅酸盐矿物都含碱金属,致使该公司生产的铁矿石产品也含碱金属。不过,大部分矿石矿物结构简单,粒度粗细不等,经粉碎和选矿,有可能降低铁矿石产品中杂质的含量。1979年以来,低磷烧结粉矿中碱金属含量已逐步降低。其中马尔姆贝里耶(Malmberget)矿不改变原-8毫米的处理粒度,其碱金属(K_2 O+Na_2 O,下同)含量由0.2%降至0.05%,而基律纳(Kiruna)矿碱金属含量由0.4%降至0.1%,矿石粒度由-6毫米减小到-3毫米。降低高磷烧结粉矿或高、低磷块矿碱金属含量的可能性受到很大限制。这取决于矿石含磷量的要求和被碎矿石的粉碎比。球团精矿磨得很细,大部分矿物充分解离,因此为降低碱金属含量提供了有利条件。
In Luji’s iron ore deposit, the mineralization of gangue and surrounding rock is very complicated. Some common silicate minerals contain alkali metals, causing the company to produce iron ore products that also contain alkali metals. However, most of the ore minerals are simple in structure and vary in grain size. After crushing and beneficiation, it is possible to reduce the content of impurities in iron ore products. Since 1979, the content of alkali metals in the low phosphorus sinter powder has been gradually reduced. Among them, the Malmberget mine did not change the original grain size of -8 mm and the content of alkali metal (K 2 O + Na 2 O) dropped from 0.2% to 0.05%. However, the Kiruna mine The alkali metal content decreased from 0.4% to 0.1% and the ore size decreased from -6 mm to -3 mm. The possibility of reducing the alkali metal content of high phosphorous sintered ore or high and low phosphorous lumps is greatly limited. This depends on the ore’s phosphorus content and the crushed ore crushing ratio. The pellets are finely ground and most of the minerals are fully dissociated, thus providing favorable conditions for reducing the alkali metal content.