This paper describes the results of a beneficiation study conducted on low-grade fluorite ore. The was aimed at development suitable process to produce chemical grade concentrate. representative sample ore up-graded by leaching and flotation process. important parameters froth were optimized obtain highest recovery A single-factor variation method applied get optimum conditions rougher concentr...

Purpose is to develop efficient scheduling excavate steep-grade iron-ore deposits using near-vertical layers relying upon production practices by an open pit of Poltava Mining-and-Processing Integrated Works (MPIW). Methods. The goal achievement involved system analysis openwork for means in MPIW; the process was structured from viewpoint decision-making under uncertainty. Findings. New methods...

Grade estimation is one of the most complicated aspects in mining. It also happens to be one of the most important. The complexity of grade estimation originates from scientific uncertainty, common to similar engineering problems, and the necessity for human intervention. The combination of scientific uncertainty and human judgement is common to all grade estimation procedures regardless of the...

Iron is one of the most important strategic materials in national production, and demand for iron ore huge world. High quality reserves have been almost exhausted, it necessary to develop a technology that utilizes low-grade ore. Limonite representative due its complex mineral elemental composition. In this paper, union process was employed separate elements limonite. Firstly, rough concentrate...

In the open-pit mining, one of the first decisions that must be made in production planning stage, after completing the design of final pit limits, is determining of the processing plant cut-off grade. Since this grade has an essential effect on operations, choosing the optimum cut-off grade is of considerable importance. Different goals may be used for determining optimum cut-off grade. One of...

It is vell known that fines and ultrafines can cause severe problems in mining and mineral processina. The decrease in the grade of ore combined with the arowinS demand for aineral products baa led to the minina and milling of increasing tOQnage or ore. Cl08ely linked with the problem of reduction in the grade of ore is. the more serious problem of the decrease in libration size. A direct cODsq...

A Life Cycle Inventory (LCI) was assembled for gold production extending from the formation of gold-ore deposits through the production of semi-refined gold-silver bullion. Inputs traditionally considered in life cycle assessment (LCA) such as energy, materials, and capital were counted along with geologic inputs and labor. Emergy, rather than traditional LCA methods, was used to make inventory...