The article says about complex processing copper matte and copper-zinc materials are considered. The thermodynamic estimation this process is given. The new way of processing of copper-zinc materials and new metallurgical aggregate is offered.
The study of kinetics of Fe(II) oxidation to Fe(III) by manganese ore at the content in the initial sulfate solution of 2g/dm3 Fe(II), 14g/dm3 H2SO4 and temperature 17-18°C, oxidant consumption 100-250% of the theoretical one and different mode of its loading was established, that in the total reaction 2FeSO4+MnO2+2H2SO4=Fe2(SO4)3+MnSO4+2H2O the first stage limiting the speed of the whole process is the interaction of MnO2 with sulfuric acid with the formation of MnSO4 passing into solution and active (atomic) oxygen, oxidizing then vigorously FeSO4 to Fe2(SO4)3.
The study of the kinetics of oxidative roasting of zinc concentrate and copper-zinc intermediate product at 400-900°C on a laboratory unit in a fluidized bed reactor showed that at temperatures up to 550-600°C there is practically oxidation of iron sulfides only, and at temperatures above 600°C there is a joint oxidation of all metal sulfides present in these concentrates.
Experiments on segregation roasting of pyrrhotite cakes in a laboratory tubular rotary kiln of periodic action showed the promising of this method for processing of the considered type of raw materials, so the research was continued on an enlarged laboratory scale ...
The main directions of technical progress in non-ferrous metallurgy, stipulated by the Directives of the XXIV Congress of the CPSU on the ninth five-year plan for the development of the national economy of the USSR, are: increasing the extraction of metals from ores, improving the comprehensiveness of the use of raw materials, widespread introduction of closed technological schemes with full processing of semi-products.
Despite significant advances achieved in the development of methods for selective chlorination and chloride distillation of materials containing nickel, cobalt and copper, iron chlorides remain an indispensable component of both the gas phase and condensate. This indicates the possibility of interaction of chlorine iron gas with oxides of non-ferrous metals in the chlorination zone and with oxygen in the condensation system. As a result of the latter process, iron is converted from gaseous chloride to solid oxide, which improves the selectivity of the condensate, and the released chlorine can be returned to the chloride distillation process.. The present work is devoted to the study of some patterns of these processes.
Laboratory and large-scale laboratory studies of the process of chloride distillation of pyrite concentrate cinder have shown the effectiveness of this method for processing this type of raw material. One of the unresolved problems related to the industrial implementation of this process is the issue of furnace heating.
For a more detailed study of the process of processing of cinders of pyrite concentrates by chloride distillation method studied the kinetics of transition to the gas phase of cobalt and iron and the effect on the sublimation of metals composition of the gas medium. Experiments were carried out on the cinder with a grain size of -0.25+0.16 mm, containing 0.5% sulfur. X-ray diffraction analysis showed that almost all the iron in the cinder is represented by oxide.Installation for chlorination experiments, described in detail by A. K. Orlov and I. N. Piskunov [1963 a, b], supplemented only by a furnace for purification of nitrogen from oxygen with the help of gopkalitovoy mixture and loading device, allowing the introduction of a sample of cinders in the reaction space after reaching the operating temperature and the specified composition of the gas mixture (10-12 min to displace air from the system after heating the reactor).
Pyrite concentrates obtained from the beneficiation of many polymetallic ores usually contain, in addition to iron and sulfur, small amounts of cobalt, copper, zinc, lead, nickel and other metals. When using these concentrates for the production of sulfuric acid extracts the bulk of sulfur, and the resulting cinders are on the content of iron in them are industrial ore. In view of the low content of non-ferrous metals, the usual methods and schemes used in obtaining these metals from rich ores cannot be used for their extraction.
In order to improve the process of chloride distillation of pyrite concentrate cinders the behavior of cobalt, copper, zinc and iron in this process was studied. The studies were carried out on an enlarged laboratory unit with the necessary changes in the process: and additions in the scheme. [1] See A. K. Orlov, I. N. Piskunov. “On the regularities of the process of chloride distillation of cobalt from pyrite concentrate cinders” in this volume.
