Uso de resíduos de queima de casca de café e argila da região sul da Bahia na obtenção de isolador elétrico cerâmico
The electrical ceramic insulators industry, uses noble raw materials such as siliceous and aluminous clays of white burning, in order to provide plasticity of the mass and contribute to electrical and mechanical properties required of the product, and feldspar with the flux function In literature...
Na minha lista:
| Autor principal: | |
|---|---|
| Outros Autores: | |
| Formato: | doctoralThesis |
| Idioma: | por |
| Publicado em: |
Universidade Federal do Rio Grande do Norte
|
| Assuntos: | |
| Endereço do item: | https://repositorio.ufrn.br/jspui/handle/123456789/20092 |
| Tags: |
Adicionar Tag
Sem tags, seja o primeiro a adicionar uma tag!
|
| Resumo: | The electrical ceramic insulators industry, uses noble raw materials such as siliceous
and aluminous clays of white burning, in order to provide plasticity of the mass and contribute
to electrical and mechanical properties required of the product, and feldspar with the flux
function In literature references the composition of the masses indicates that the clay
participates in percentage between 20 and 32, and feldspar 8 to 35, these materials have
significant cost. In this research was performed the total replacement of commercial clay, for
white burning clay from Santa Luzia region in southern Bahia and partial replacement of
feldspar by ash residue of husk conilon coffee burning, from extreme south of Bahia. The
objective of replacement these raw materials is to aver its technical feasibility and call
attention for the embryo pole of ceramic industry for the existing in the south and extreme
south of Bahia, which has significant reserves of noble raw materials such as clay white
burning, kaolin, quartz and feldspar, and generates significant volume of gray husk conilon
coffee as alternate flux. Clay Santa Luzia is prima noble material whose current commercial
application is the production of white roofing. The residue of coffee husk ash is discarded
near of production sites and is harmful to the environment. Phase diagrams and statistic
design of experiments, were used for optimization and cost savings in research. The results
confirmed the expectations of obtaining electrical ceramic insulators, with white burning clay
of Santa Luzia and partial replacement up to 35.4% of feldspar, by treaty residue of conilon
ash coffee husk burning. The statistic design that showed best results was for formulation
with percentages of: clay 26.4 to 30.4%; kaolin 14.85 to 17.1%; feldspar 12.92 to 16.96%; R2
residue 7.08 to 9.2% and Quartz 32.5 to 38.75%, relative to the total mass of the mixture. The
best results indicated; 0.2 to 1.4% apparent porosity , water absorption 0.1 to 0.7%, flexural
strength 35 to 45MPa , dielectric strength 35-41 kV/cm , the transverse resistivity 8x109
2.5x1010 Ω.cm and for the dielectric constant ε/ε0 7 to 10.4, specification parameters for
manufacturing ceramic electrical insulators of low and medium voltage. |
|---|