COMPUTER PROGRAMS FOR CALCULATING THE PARAMETERS OF FERROALLOY SMELTING IN A CONTINUOUS CARBON--THERMAL PROCESS

摘要

In traditional automatic control systems of technological processes (ACSTP), computerization entails conversion of the primary information from the local automatic control system (type of batch dosing, control of electrical conditions, electrode operations, etc.) into a unified, clearly organized information-system structure and modules for modeling technological processes. The systems for calculating the potential, power, current, temperature, thermal, and other fields in the furnace bath during the production of various alloys are of most importance [1]. The introduction of such a structure disciplines and optimizes the technological process. However, for the current automatic control systems at Nikopol'sk (NFP) and Zaporozhsk (ZFP) Ferroalloy Plants and in shop 8 of Chelyabinsk Electrometallurgical Works (CEMW), in contrast to the local automatic control systems dosing the batch materials, performing automatic safety procedures, and regulating the electrical operation, by-pass conditions, etc., there is only one basic determining factor: the quantity of carbon in the batch (and also quartzite in smelting silicomanganese at NFP). Fundamentally, the Ural and Ukrainian (and also the Tula, Smolen'sk, and partially the Cheboksary, Moscow, and St. Petersburg) systems are based on the relation of the resistance of the bath (ZFP and NFP), batch, arcs, and melt (CEMW, Tula), and the electrode immersion depth with the quantity of carbon in the batch, for specified electrode consumption and stoichiometry of the balanced chemical formula for producing the alloy, taking account of the moisture content and the chemical composition of the batch; see [2] (pp. 38-41, 186, 216-221, 246-256, 257-259), [3] (pp.43-50, 149-158, 159-166, 206-219), and [4]. Currently, an improved computerized automatic system (CAS) for the collection and analysis of information is under development at NFP.