The composition of the off-gases of the converter process makes it possible to judge the degree of oxygen utilization from the blast, the burnout of metallic iron from the matte, and other features of the development of physicochemical transformations in the converter bath. ...
In 1971, employees of the NMMC GMOITs proposed a technology for converting mattes without the addition of siliceous fluxes, which, according to the authors, would reduce the yield of converter slags and, in the future, allow them to be processed to extract iron.
Sands of a number of titanium deposits contain, in addition to ilmenite — FeO·TiO₂, significant amounts of siderite FeCO₃. During beneficiation, ilmenite and siderite are separated, sending the siderite concentrate (SC), containing part of the TiO₂ and impurities, to the waste dump, and the iron-titanium concentrate (ITC) to electrosmelting for titanium slag. ...
One of the most important structural elements of the unit for continuous conversion of matte by the method of the LGI – Gipronickel is the unit of blast supply to the melt. In industrial continuous conversion units, the critical periods of tuyere operation must be reduced to a minimum through stable operation of the unit, relatively small fluctuations in the bath level, maintenance of the optimal distance between the tuyere and the melt, and the optimal thickness of the slag layer on the bath. This will help significantly extend the service life of industrial tuyeres.
One of the directions for the improvement of pyrometallurgical processing is the creation of multi-chamber units, in separate chambers of which processes of a different nature are carried out. Such combined units for ore smelting and slag depletion, conversion and depletion, and smelting, conversion and depletion have been developed in recent years in the USSR and abroad. ...
The method of slag depletion by filtration through a layer of lumpy reducing agent has been known for a long time and has been tested under various conditions, but it has not found industrial application, since effective depletion requires too thick layers of reducing agent. The opinion has become established that in the depletion of converter slags the filtration method is suitable mainly as a first, preparatory stage (magnetite destruction), which does not give significant advantages over well-established depletion technologies. ...
The continuous conversion process being developed by the Leningrad Mining Institute together with the Gipronickel Institute is based on top blowing of matte melts in a stationary unit.
The use of material balance equations is the basis of numerous methods of analyzing and calculating metallurgical processes. However, such equations are quite insufficiently applied in the preparation of experimental balances. The present paper deals with the method of obtaining indicators of material distribution in the metallurgical process on the basis of their compositions obtained experimentally. It involves the preparation of balance equations of several chemical elements in the form linking the compositions and quantities of materials, and solving the system of such equations by the usual algebraic methods. A partial variation of such a method was used, for example, by V. A. Bogolyubov. In this case, the task of obtaining a more general formulation is set.
