The presence of even harmonic components of current and, above all, the harmonic component with a frequency of 100 Hz is possible only if the electric circuit elements, the resistance of which depends on the direction of current. Such elements may be a contact of electrode with the melt and the electric arc AC. Change the relative content in electrode current harmonic component with a frequency of 100 Hz dependent from the penetration of the electrode in the melt and the degree of electric arc development.
In the present article is formulated a unified approach to the question of the transposition of the kinetic equations of various degrees complexity which describe the kinetics homogeneous and heterogeneous chemical processes, which take place in the metallurgical equipment. This situation fact has a considerable practical importance because the use of equations excludes subjectivity in the determination of the values of parameters and control of the metallurgical processes.
One of the main problems of modeling of pyrometallurgical processes and roasting in a fluidized bed is the optimal choice of defining aggregate factors of the object. The general trend in the use and management of complex objects is the development and adoption of solutions exclusively human. In this case the correctness of the decision depends on an adequate diagnosis of the technical state of the object. Thus, the ability to operate the facility is completely determined by its technical state at any given time, and accuracy of decision-making expert.
Предложено кинетическое уравнение, описывающее закономерности кинетики процесса окислительного обжига сульфидного никелевого концентрата. Рассматриваемый метод позволяет объективно определять предельное время завершения исследуемого процесса. Уравнение может быть использовано для описания закономерностей различных гетерогенных процессов.
Предложенное уточненное уравнение при определенных условиях может совпадать с известным уравнением Бугера – Бера, но в то же время более точно отражает особенности реальных систем. Уравнение может быть применено для определения значений обобщенных оптико-геометрических характеристик потока излучения и моделирования тепловых потоков технологических процессов.
Regularities of particle residence time distribution in the pilot fluidized bed furnace with return cyclones are investigated. The parameters of curve functions of particle residence time distribution at the furnace outlet for cinders and dust at the outlet from the return cyclone were determined: average residence time, dispersion and number of cells in the cell model. It is established that the flow structure in the studied fluidized bed furnace is close to the model of ideal mixing.
