Ulexite
Mostrando 1-5 de 5 artigos, teses e dissertações.
-
1. Replacement of fluorspar in the desulfurization of hot metal
Abstract In the steel industry, lime is used as a desulfurizing agent and fluorspar as flux in the hot metal desulfurization process. However there are environmental concerns regarding the use of fluorspar, even when its harmful effects are not fully known. In order to reduce such risks and also to anticipate possible future restrictions, which could undermi
REM, Int. Eng. J.. Publicado em: 2018-04
-
2. Leaching kinetics of ulexite ore in aqueous medium at different CO 2 partial pressures
Abstract This manuscript presents a study regarding the leaching kinetics of ulexite (Na2O.2CaO.5B2O3.16H2O) under different CO2 partial pressures in aqueous media. The effects of the reaction temperature, particle size, CO2 partial pressure, solid-liquid ratio, and agitation speed were investigated in the boron extraction from the ore. As a result of the ex
Braz. J. Chem. Eng.. Publicado em: 2018-01
-
3. Fontes e doses de boro em porta-enxertos de seringueira.
Este trabalho teve por objetivo avaliar o efeito da aplicação de boro sobre o incremento do diâmetro do caule no ponto de enxertia, 5 cm acima do coleto, número e diâmetro de raízes laterais e estado nutricional de porta-enxertos para produção de toco enxertado de raiz nua. O delineamento experimental foi o de blocos ao acaso, em esquema fatorial 2x5
Pesquisa Agropecuária Brasileira. Publicado em: 2011
-
4. Dissolution kinetics of ulexite prepared under different calcination temperatures
Ulexite is one of the boron minerals used as a raw material in the production of boron compounds. It contains a substantial amount of hydration water. Using calcination methods, the B2O3 grade of ulexite can be increased. In this study, the effect of calcination temperature on dissolution kinetics of ulexite in ammonium chloride solutions was investigated in
Brazilian Journal of Chemical Engineering. Publicado em: 2008-12
-
5. Boron fertilization in pêra rio sweet orange affected by citrus variegated chlorosis. / Adubação boratada em pomar de laranja Pêra Rio afetado pela clorose variegada dos citros.
Citrus crop is extremely dependent on an adequate mineral nutrition to reach bigger levels of production to fewer costs, especially under adverse conditions, as in the case of occurrence of citrus variegated chlorosis (CVC). In this context, boron directly influences the production because it provides a bigger root growth, what increases the volume of the ex
Publicado em: 2003