Innovative Method of Material Treatment by Microwave Energy

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27350%2F15%3A10238007" target="_blank" >RIV/61989100:27350/15:10238007 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.proeps.2015.08.137" target="_blank" >http://dx.doi.org/10.1016/j.proeps.2015.08.137</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.proeps.2015.08.137" target="_blank" >10.1016/j.proeps.2015.08.137</a>

Result language

angličtina

Original language name

Innovative Method of Material Treatment by Microwave Energy

Original language description

In the submitted paper, the attention was devoted to the application of microwave energy in the treatment of various raw materials. The influence of microwave heating on the melting of andesite rocks is described. It was confirmed that the heating rate was fast. The melting of andesite samples after 10 minutes of microwave heating at frequency of 2.45 GHz and output 900 W was observed. The achieved temperature of melt was above 1200 degrees C. The rate and selectivity of microwave heating are the most important advantages of microwave energy utilization in various processes, not only in mineral processing. Microwave energy has been applied also in many waste treatment processes. In this paper, microwave vitrification was used for the stabilisation of nickel leaching residue (NLR), which was used as model carriers of heavy metals (Cd, Pb) from wastewater treatment. The mixture of waste in different ratio (from 30-50 % of NLR) with raw materials (andesite, dolomite, glass sand) was melted in a microwave furnace with frequency of 2.45 GHz and output 1000 W during 45 minutes. After melting, the vitrified samples were similar to glass-ceramics. The TCLP test was carried out for testing chemical durability and a Vicker&apos;s indentation method showed the micro-hardness. The TCLP results showed good chemical durability of glass-ceramics. The measured values were under limit. The micro-hardness was measured in two different zones (matrix and white zones), which were identified with light microscopy. The results of the experiments proved that it is possible to stabilize the waste with content up to 50 % NLR in short time by microwave energy. (C) 2015 Published by Elsevier B.V.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

—

OECD FORD branch

20703 - Mining and mineral processing

Project

<a href="/en/project/LO1406" target="_blank" >LO1406: Institute of clean technologies for mining and utilization of raw materials for energy use -Sustainability program</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year

2015

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů