Abstract
Study of the effect of boron oxide and basicity of CaO – SiO2–B2O3 – Al2O3slag system on MgO saturation concentration was carried out using the simplex lattice method of experimental design, which allows one to construct mathematical models describing dependence of studied property on composition as a continuous function. Synthetic slags, corresponding in composition to vertices of studied simplex, were smelted in graphite crucibles from previously calcined oxides of analytical grade. Slag compositions corresponding to the remaining points of local simplex plan were obtained by counterblending slags of simplex tops. Using experimental data, mathematical models adequately describing effect of slag composition on saturation concentration of MgO were constructed. Graphic image of mathematical modeling results is represented by the composition diagram – saturation concentration of MgO. Analysis of experimental data presented in diagram made it possible to obtain new information on the effect of boron oxide and basicity of CaO – SiO2 – B2O3slags system containing Al2O3on MgO saturation concentration. It was established that in slags formed in basicity range of 2 – 3 and B2O3content of 1 – 3 %, saturation concentration of MgO varies from 3 to 9 %. Increase in B2O3content in slag to 4 % leads to an increase in MgO saturation concentration in slag of 11 – 13 %. Displacement of slags to area of increased basicity up to 3 – 4 is characterized by a decrease in MgO saturation concentration to 2 – 5 %, with 1 – 3 % of В2О3content and an increase to 7 – 9 % at 3 – 4 % В2О3in slag. Formation of slags in basicity range of 4 – 5 and B2O3content of 1 – 3 % does not lead to a significant decrease in concentration of slag saturation with magnesium oxide. Saturation concentration of MgO in slag in this area of basicity varies from 2 to 4 % and practically does not reach 7 % with an increase in В2О3content to 4 %. At the same time, there is an increase in cost of steel due to an increase in consumption of lime and material containing boron oxide.
Highlights
Study of the effect of boron oxide and basicity of CaO – SiO2 – – B2O3 – Al2O3 slag system on MgO saturation concentration was carried out using the simplex lattice method of experimental design, which allows one to construct mathematical models describing dependence of studied property on composition as a continuous function
Graphic image of mathematical modeling results is represented by the composition diagram – saturation concentration of MgO
It was established that in slags formed in basicity range of 2 – 3 and B2O3 content of 1 – 3 %, saturation concentration of MgO varies from 3 to 9 %
Summary
ИССЛЕДОВАНИЕ ВЛИЯНИЯ В2О3 И ОСНОВНОСТИ ШЛАКОВ СИСТЕМЫ CaO – SiO2 – B2O3 – Al2O3 НА КОНЦЕНТРАЦИЮ НАСЫЩЕНИЯ ОКСИДОМ МАГНИЯ*. Исследование влияния оксида бора B2O5 и основности шлаков системы CaO – SiO2 – B2O3 – Al2O3 на концентрацию насыщения оксидом магния MgO выполнены методом симплексных решеток планирования эксперимента, Этот метод позволяет построить математические модели, описывающие зависимость изучаемого свойства от состава в виде непрерывной функции. Анализ приведенных на диаграмме экспериментальных данных позволил получить новые сведения о влиянии оксида бора и основности шлаков системы CaO – SiO2 – B2O3 , содержащих Al2O3 , на концентрацию насыщения оксидом магния MgO. В настоящей работе приведены результаты экспериментальных исследований влияния оксида бора и основности шлаков системы CaO – SiO2 – B2O3 , содержащих 15 % Al2O3 , на концентрацию насыщения оксидом магния MgO
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