|
|
| |
| Thermodynamical Properties of the Process of Sintering of Iron Storage Copper Concentration Factories with Lime
Download PDF
|
Khojiev Sh.T., Suyunova M.N., Saidova M.S., Yarashev U.Q.
|
Abstract:
the article discusses the thermodynamic aspects of the process of liming the wastes of copper concentrators containing iron. When chemically analyzed the composition of copper concentrator waste, the iron content was 52.7%. Quantitative analysis based on the chemical composition of iron and silicon in the study revealed that the raw iron in the form of iron and silicon iron (II) -metasilicate. Based on this material composition, a method for the extraction of iron oxide from iron silicate in the presence of calcium oxide was proposed, and the conditions under which the process took place were studied. The mechanism of chemical phenomena occurring in the regions of interaction of iron (II) metasilicate and lime has been developed. Based on the mechanism of chemical reactions developed, each chemical reaction that occurs in the process is analyzed from a thermodynamic point of view. Thermodynamic analysis revealed that the limiting stage between the chemical reactions that take place in the iron (II) -metasilicate and lime system is the phase of diffusion of iron silicate and lime molecules. Due to this, the temperature required for the complete interaction of iron silicate with lime was 1598 K (1325 oC). It is at this temperature that the equilibrium constants of all chemical reactions have high values, as evidenced by the study of the kinetics of the process.
|
|
|
| | |