Sentence examples for grade of ore from inspiring English sources

We employ a new real options model for determining the optimal cut-off grade of ore under stochastic prices.

Over the last 30 years the average grade of ore bodies has significantly decreased while the proportion of waste removal has in many cases more than doubled.

The history of mineral flotation is a record of over a century of impressive innovations, especially in the development of flotation chemistry and chemicals, the principles of their action, their manufacture and the role they play in sustaining efficiencies and productivities even as the quality and grade of ores decline, and the severity of the challenges increases.

The furnace can also accept different grades of ore.

Rock-breakers work with geologists and surveyors to make sure that only profitable grades of ore are mined.

Dr. Hein said dwindling supplies of terrestrial copper — a key ingredient of industrialization used in everything from wires and switches to pipes and roofs — have forced miners on land to go after increasingly low grades of ore and have raised interest in seabed resources.

The grades of ore elements are analyzed by fractal and multifractal methods.

One of the main problems in mining operations is how to determine the optimal cutoff grades of ore deposits at different periods during the life of a mine, it can be considered based on one of the goals of maximizing annual profit or net present value extraction during the mining period.

As improvements in mining technology allowed lower grades of ore to be processed, and new heavy equipment allowed greater amounts of rock to be moved, mining in Death Valley changed.

The amount of mercury lost in both processes varied according to the skill of the refiner, the integrity of the seals in the smelters, and in the case of silver refining the grade of the ore, with richer ores consuming more mercury than poorer ores.

Although China formerly was regarded as deficient in iron ores, huge quantities of varying grades of ores have been discovered that are widely distributed and often located close to coal supplies.