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Published on 26 September 2016

RATIONAL METHOD OF PROVISION OF CURRENT SUPPLY IN ORE MASS BY THE UNDERGROUND AND ELECTROCHEMICAL LEACHING

Kondrat'ev Yu.I., Vazieva L.T., Ushakova S.M.

One of the most important factors determining effective intensification of underground and heap leaching of ore mass by the electric current is the insurance of identical current density in all parts of the processed volume. Achieving the same current density is provided primarily by the input of electrical current to the ore mass. There are 2 possible ways of supplying the electric current for underground leaching: through a system of coaxial and opposite electrodes in ore mass and through electrodes, passing through the ore mass (in conditions of successful construction of wells and connection of electrodes in stored ore). Heap leaching can be expanded with 3 more methods: the parallel spaced plates; a plate and electrodes, which are perpendicular to it; a plate and electrodes, which are parallel to it. Distribution of the electric field and, therefore, the current in leached ore mass are hardly considered in literature except the input of electric current through a system of coaxial and opposite electrodes in ore mass. The article presents the results of analytical studies of electric fields distribution for the remaining cases, which are based on methods of calculation of electric fields. Analysis of patterns of the electric fields described by mathematical expressions, shows that the uniform field of leached ore mass can only be obtained when the current input is implemented by using two parallel plates. However, such method of current input is unrealizable in underground leaching and extremely difficult to implement in heap leaching. Method of «plate – parallel electrodes» is also difficult to implement during the heap leaching. The most possible alternatives are the current input through coaxial opposite electrodes connected with the leached ore mass or through parallel electrodes. But, it is impossible to obtain a uniform electrical field in the ore mass, using such methods, even in case of application of multiple pairs of coaxially opposite or parallel electrodes. This disadvantage cannot be removed completely even by using the alternate feeding of current pulses to separate pairs of electrodes in the regime of “running wave”. Voltage supply in the regime of “running wave” on the individual, in a certain way formed groups of pairs of electrodes provides at different points of time the flow of equal current in the processed ore mass in all directions (in height, along the strike and across). Using this method of power supply will allow us to evenly and therefore efficiently operate with the entire volume of the leached ore mass.
CityVladikavkaz
CountryRussia
UDC622.277:621.3
Issue2016, № 3(Т.8)
Key wordselectrochemical, underground and heap leaching, ore mass, method of current input, distribution of electrical field.
Number of views (1338)

Categories: Technical-and-Technological-Issues-of-SDMT

Tags: электрохимическое подземное и кучное выщелачивание, рудная масса, способ ввода электрического тока, распределение электрического поля

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ISSN 1998-4502 (Print)                                                            ISSN 2499-975Х (Online)