Journal of Mining World Express
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Open Access journal
ISSN (Print) 2169-642X - ISSN (Online) 2169-6438
Published by Science and Eng Pub Co. [48 journals]
- Effect of Impurity Ions on Vanadium Precipitation in Vanadium-rich
Abstract: Effect of Impurity Ions on Vanadium Precipitation in Vanadium-rich Solution
Author Xiaobo ZhuWang LiSen TangWenzhong L
The impurity ions of phosphorus, silicon, potassium, sodium, iron and aluminum are existed in the vanadium-rich solution obtained from vanadium-bearing titano-magnetite with sodium roasting, water leaching and ion exchange. The impurity ions can affect the precipitation rate of vanadium and the purity of V2O5. Precipitation of vanadium from synthetic vanadium-rich solution containing the impurities has been investigated. The results show that the restrictive concentration of phosphorus, silicon, potassium, sodium, iron and aluminum was 0.02 g/L, 0.5 g/L, 1 g/L, 70 g/L, 2 g/L and 0.8 g/L, respectively. The concentration of phosphorus in the real vanadium-rich solution was more than the restrictive value, where the precipitation rate of vanadium and the purity of V2O5 were low. However, the precipitation rate of vanadium reached 99.43% and the purity of V2O5 was 99.32% by removal of phosphorus with 0.8 g CaCl2 per liter real vanadium-rich solution.
- Modeling the Recovery of Froth Flotation Using Game Theory
Abstract: Modeling the Recovery of Froth Flotation Using Game Theory
Author Mohammed-Noor Al-Maghrab
For a better understanding of froth flotation principle and to explain the conflict in flotation a recovery model is formulated. From the theoretical formulation, it transpires that based on the gain values of the various strategies of the three players in a game theory, it is possible to predict pure mineral recovery using flotation column by summing up the concentrate of the two players at a time. The present work is an attempt to apply the game theory to a mineral extraction problem where the aim of flotation optimization is to find the operating conditions which gives the highest grade and recovery using game theory with three players.
- Mineral Industry in Egypt– Part II Non-Metallic Commodities –
Abstract: Mineral Industry in Egypt– Part II Non-Metallic Commodities – Silica Ores
Author M. Ezz-El DinA. M. AbouzeidKh. El maadawyA. M. KhalidR. E. El Sheri
Silicon, nowadays, is involved in many advanced and high technology industries due to its unique property. The silica ores exist in the form of quartz, quartzite, and white sand. In Egypt, quartz is confined to igneous and metamorphic origins, while white sand exists in the form of sedimentary deposits. Quartz and quartzite are found in association with basement rocks in Eastern Desert and Western Desert. While white sand deposits are widely distributed in Sinai, Eastern Desert, and Western Desert, with the most commercial deposits in Sinai and Eastern Desert.Estimation of the geological and economic reserves indicate huge tonnages of all types of silica ores. Quartz reserves sum up to 20 million tons, and silica sands sum up to more than 3 billion tons. Evaluation of the chemical and physical characteristics of the silica in Egypt showed high quality silica with low contaminations. The major part of these reserves is available through open-pit mining with very low costs due to minimal overburden. Some of the silica sand deposits contain a high percentage of white kaolin, up to about 11 percent, which is separated as a valuable economic byproduct. The basic processing operations of the white sand are washing, screening, attrition scrubbing, desliming and dewatering. In some locations magnetic separation is used for the removal of magnetic impurities. Academic research work showed that the quality of the white sand product can be improved when froth flotation operation is used.