OLKO-Maschinentechnik GmbH, part of Thyssen Schachtbau holdings, received the order to supply two mine hoists for the extraction of the world's largest polyhalite deposit. Siemens supplied the electrical equipment consisting of medium-voltage synchronous motors which are powered by medium-voltage Sinamics SM 150 frequency converters. The COBRA01 multi-channel brake system provides a soft braking, comparable to a cars ABS system, but operating with 4 independent hydraulic braking channels. The production hoists is one of the largest in the world. The drum diameter, including the disk brakes, is 6.8 meters. The motor has an output of 9.3 megawatts.
Increasing demands on food production
Total global population is set to 9.8 billion by 2050. More food will have to be produced than ever before in the history of mankind. At the same time, there is less high-quality arable land available and previous agricultural methods of food production are proving unsustainable. To counteract this, Sirius Minerals has developed POLY4, a multi-nutrient fertilizer. This increases yields and improves agricultural sustainability through the continuous release of four key nutrients which are better tailored to plants' requirements then conventional fertilizers. In addition to this, POLY4 makes a significant contribution to soil health through the addition of calcium which fortifies the soil and increases its resistance to erosion, compaction and nutrient loss.
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