Boreskov Institute of Catalysis of the Siberian Branch of Russian ...

PP-II-2OPTIMIZING OF CHEMICAL REACTORS OPERATION USING APROGRAM SYSTEM FOR BEST MIXING OF RAW MATERIALSB.S. Boyanov 1 , K.I. Ivanov 21 University of Plovdiv, Department of Chemistry, 24 Tsar Assen St., 4000 Plovdiv, Bulgariatel. +359 32 261412; fax: +359 32 635049; e-mail: boyanb@uni-plovdiv.bg2 Agricultural University, Department of Chemistry, 12 Mendeleev St.,4000 Plovdiv, Bulgariatel. +359 3265420 ; fax: +359 32 633157; e-mail: kivanov1@abv.bgIn the chemical technology and metallurgy some productions (glass, ceramics, Zn, Cu,Pb, etc.) use a considerable number of initial solid raw materials that differ in their chemical,phase and granulometric content.The stable operation of the chemical reactors and furnaces requires for a prolonged periodof time a mixture with a fixed composition, obtained by mixing of sometimes 10-12 types ofinitial raw materials and semi-finished products. In this connection a program system wasdeveloped, which is a part of the automated system for control of the technological processes.Its main objective is, based on the various raw materials, to offer the most suitable mixture forthe specific chemical or metallurgical production.In this specific case the example taken is the mixing of zinc concentrates for roasting influid bed furnaces as a part of the hydrometallurgical production of zinc.Today eighteen components are under control in the zinc concentrates, which by natureare a polymetallic raw material. In order to avoid difficulties in the process of roasting andleaching, a significant part of these components should be in concentrations lower than certainmaximum values.A program for calculating mixing proportions for zinc production aimed at creatingoptimal mixes of the zinc concentrates is developed. The program consists of three majormodules:1. Establishment of the necessary data, corrections, processing and drawing of the wholeinitial information. The program allows easy introduction and storage of data for all offered,received and processed zinc concentrates. Access to the data is easy and an inquiry or acomparison can be quickly made and used in buying zinc raw materials.2. Calculation of receipts for mixing proportions in two possible regimes:Automatic Regime. It serves to obtain the proportion of all concentrates at determinedlimiting conditions. The calculations are made by complete combinations of the enteredconcentrates and calculating all possible outcomes. The mixes are arranged by an optimizing275