Abstract
In the industry of the silicon it is generated as residual silica, of very fine size, with high content in SIO2 (>92 %). In this work, the possibility of substituting, complete or partially, the residual silica for commercial sands is studied. At the moment, sands are used in the elaboration of soluble glasses by melting. This study is carried out by thermogravime tric and differential thermal analysis of the raw materials and mixtures of them. The energy balance of the system indicates that it is required lower energy when using the residual silica. The presence of impurities in the residual silica can give place to the formation of compound insoluble in the water glass. It is concluded that the residual silica can be used partially in the making of sodium silicate glass.
Highlights
En la industria del silicio metálico se genera como residuo microsilice, de granulometría muy fina, con alto contenido en sílice (>92 %)
In the industry of the silicon it is generated as residual silica, of very fine size, with high content in SÍO2 (>92 %)
Sands are used in the elaboration of soluble glasses by melting
Summary
Los vidrios solubles son muy utilizados en diversas aplicaciones, ya sea a nivel industrial o comercial, tales como la elaboración de adhesivos, recubrimientos anticorrosivos, tratamiento de minerales por flotación, en la industria del papel, en la metalúrgica y refractarios, etc.^^ ^ ^l Para producir estos vidrios solubles, como el silicato de sodio de módulo mayor de 3, se utilizan materias primas que aporten sílice y sodio. En el presente trabajo se presentan, los resultados de un estudio llevado a cabo para determinar si esta microsilice, gracias a su alto contenido en SÍO2, puede ser utilizada como materia prima para la elaboración de vidrio soluble de alto módulo por el método convencional de fusión. Los Chaguaramos, Caracas 1042-A, Venezuela, le cyberleo^vahoo.com (**) Centro Nacional de Investigaciones Metalúrgicas (CENIM-CSIC), Avda. La aplicación de arenas en metalurgia es bien conocida y continúan desarrollándose nuevas aplicaciones^ \
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