Optimering av käftkross för Kankbergsmalm

Sammanfattning: Kankberg’s gold and tellurium ore has been shown to consist of more easily-ground ore and more hard-ground ore for the last decade. When the hard-ground ore enters the enrichment-plant so can the flow rate of the autogenous mill almost halved, from 110 ton/hour (easily-ground ore) compared to 60 ton/hour (hard-ground ore). What one wishes to try to achieve is to identify the ore-type and affect the conversion of the crushing process into the jaw-crusher of the hard-ground ore, so that you can finally get as equally tonnes per unit of time in the autogenous mill as can be obtained from easily-grounded ore. By optimizing the jaw-crusher, it will lead to a reduced total energy consumption in the autogenous mill, resulting in high product quality and reduced production costs. A number of surveys and tests were done when the jaw-crusher was active in order to identify what kind of oret hat has been going through the jaw-crusher. The aim was to get as so-called ”key indicator” that has the unit kWh/ton, which could then be used to identify the ore type. As a result, it was possible to distinguish the type of ore that was more hard-ground ore and easily-ground ore by comparing different values of the ”key indicators” with equal mass of tonnes ore and varied energy consumption. Based on these results, it is possible to streamline the turnover of the autogenous mill at the enrichment plant, thanks to an efficient system of the jaw-crusher.