Enrichment on Bangka tin slag’s tantalum and niobium oxide contents through non-fluoride process
Journal Title: Восточно-Европейский журнал передовых технологий - Year 2018, Vol 5, Issue 12
Abstract
<p>This research explored how non-fluoride solutions including 8M NaOH, 0.8, 1.6 and 2.4 M H<sub>2</sub>SO<sub>4</sub>, and 0.1, 0.4 and 0.8 M HClO<sub>4 </sub>increased the contents of tantalum and niobium oxide through leaching. Before leaching, Bangka tin slag (BTS) was characterized through XRF. The slag was then 900⁰C-roasted, quenched, and dewatered. Next, BTS underwent a sieving process with size classifications of +100, -100+150, -150+200, -200+250, and -250 mesh. After that, the -200+250 mesh slag was leached with 8M NaOH. Then, the leached product was divided into two, one of which was 0.1, 0.4, and 0.8 M HClO<sub>4</sub>-leached and the rest of which was leached with 0.8 M HClO<sub>4</sub> followed by 0, 0.8, 1.6, and 2.4 M H<sub>2</sub>SO<sub>4</sub> at 25⁰C within 2 hours. All the residues characterization used an XRF while that of filtrates used an AAS as well as an ICP-OES. The motives that drive this investigation are the deficit of tantalum supply and its status as one of the technology-critical elements. In addition to that, most of prior investigations enhanced the contents of tantalum and niobium oxide using fluoride acid while this study ventured non-fluoride solutions. The result shows that perchlorate acid followed by sulfuric acid leaching slightly enriches the tantalum and niobium contents. However, this method is the most effective among NaOH, HCIO<sub>4</sub>, and HCIO<sub>4 </sub>followed by H<sub>2</sub>SO<sub>4 </sub>leaching. This finding is a form of scientific effort to maintain the tantalum supply through utilizing worthless waste of tin smelting<em></em></p>
Authors and Affiliations
Sulaksana Permana, Shiva Frida Vincia, Anggita Amilia, Ahmad Maksum, Kurnia Setiawan Widana, Johny Wahyuadi Soedarsono
Electrochemical regeneration of oxygencontaining compounds in the extracts of used oils
<p>Growth in the volumes of oils applied for various purposes, including motor oils, results in the formation of large quantities of toxic waste – used oils. At the same time, they are a valuable raw material for the pro...
Studying fiberreinforced concrete for casting housing parts of pumps
<p>Many enterprises of the mining and metallurgical industry use pumps transferring aggressive liquids and slurries containing abrasive particles. For the manufacture of pump housings, taking into account their operating...
The model to optimize deliveries of perishable food products in supply chains
<p>The probabilistic-statistical analytical model of optimizing the supply of perishable food products (PFPs) has been improved. The demand for PFPs is effectively satisfied by introducing into supply chain systems a pos...
The study of lentil flour as a raw material for production of semismoked sausages
<p class="a">In the production of sausages, soy and products of its processing, varieties of food soy flour are mainly used as an additional component. It has been established in a study of safety of using soy that a lar...
Development of the procedure for forming nonstationary signal structures based on multicomponent LFM signals
<p>Noise protection of existing radio lines with noise-shaped signals and digital types of modulation was studied. Analysis has shown that the use of such signals in conditions of the radio-electronic conflict does not p...