digital divide network - article database

In the field of extractive metallurgy, mineral processing, also known as mineral dressing or ore dressing, is the process of separating commercially valuable minerals from their ores.

Valuable minerals in the ore body is usually locked, extracted using different mining methods. These methods depends on the deposit characteristics and safety, technical, environmental and economic constraints. Such as shape and intensity of rock geology has played a key role in selection methods. Mining units to extract the basic steps of operation of the valuable minerals. They are divided into two categories: rock mining and material handling. The first two basic unit operations: drilling, blasting, and material handling, including loading or excavation and transport (horizontal transport).

General heterogeneous brittle rock materials, this heterogeneity is a mineral composition, particle size, particle shape, particle strength, porosity and micro-cracks from blasting and other factors. The last few decades have seen major advances in instrumentation and technology, and simplifications and modifications of new flotation plant designs. This has allowed for significant developments in process control. In particular, the development of base level process control (control of pulp levels, air flowrates, reagent dosing, etc.) has seen significant progress. Long-term, automated advanced and optimising flotation control strategies have, however, been more difficult to implement. It is hoped that this will change as a result of the development of new technologies such as machine vision and the measurement of new control variables, such as air recovery.

Rock can be called ore processing in a profit. To extract the mineral from the ore carrying separation operation of the integration of mineral processing or mineral is well known precious metals are required. The purpose is to increase the concentrator, in the way of economically viable and valuable mineral content, so that the metal extraction process then become profitable.Ball mill:http://www.crusher-machine.com/21.html
vibrating screen:http://www.hxjq-crusher.com/40.html

Mining - crushing - grading enrichment - the final product - processing - = port + smelting - tailings

The main operations of a mineral processing plant

Crushed. Rock crushing (crushed) liberated from the ore matrix (dressing) of valuable minerals, thereby increasing the high reactivity (in Hydrometallurgy) area and facilitate the particle transport between the unit operations use the impact crusher and grinding ball mill. View of the dry ore mill operation, the main work of mill mud, which means that a certain amount of water must be added to the ore milling circuit entered.

Size separation. The crushing process often produces a wide range of particle size distribution of particles, some products may not provide adequate liberation of the right size, so need to be further crushed. Particles of sufficient size (liberation) by the large spiral separator the size of particles through a classification process to complete. Vibrating screen for coarse particles and fine particle size or mechanical classification is used.

Mineral concentration. This enriched ore (gangue) retained as much as possible (the concentration process) may remove the unwanted precious minerals process most of the species. Froth flotation separation of sulfide is the most commonly used method, which is used for gravity separation of heavy minerals (such as Precious metals, iron oxide, etc.), magnetic and electrostatic industrial minerals and iron oxide separation. In froth flotation, air bubbles into the excitement of the pulp. By adjusting the number of pulp properties (pH, pulp potential (Eh), etc.)