Gubina V., Zaborovskiy V.
State Institution “Institute of Environmental Geochemistry , National Academy of Sciences of Ukraine”
Language: Ukrainian
Geochemistry and ore formation 2015, 35: 56-62
https://doi.org/10.15407/gof.2015.35.056
50 years of work of ferruginous quartzite ore mining and processing enterprises (OMPE) caused formation of technogenic objects – tailings dumps accumulating over 5 billion of tons of waste products in Kryvbas area. Annual amount of it exceeds 140 mln tons. Our work is aimed at investigation of the material composition of the tailings for their further recycling. The tailings are the mixture of technical fluids and solids with the ratio of 1 : 10. The solid phase consists of <0,007 mm particles. The objective of the investigation is to analyze the statistic data on the annual amount of the tailings at each enterprise, and to estimate the material composition of the tailings of ferruginous quartzite ore enrichment and distribution of iron and other microcomponents in different fractions. The grain size of the tailings was determined by the dry sieving method. The mass fraction of iron in the tailings was estimated by atomic adsorption chemical analysis. The microelement composition was analyzed by emission spectrometer, the mineral composition – by X-ray analysis. To determine the distribution of elements in different fractions we used magnetic, electromagnetic and gravitational analyzes. Conclusions: 1. The 0.30–97.34 wt % of the tailings are presented by <0.071 mm grains. The smallest grains size is at Northern and Ingulets OMPEs, larger – at “MittalStil Kryvyi Rig” and Southern OMPEs which use different schemes of ore grinding. 2. The highest content of iron (14.0–14.5 wt %) is in the smallest <0,071mm fraction of the tailings at Central and Nothern OMPEs. 3. Magnetic fraction of current tailings at all ferruginous quartzite ore mining and processing enterprises (OMPE) represented quartz with hematite and magnetite, and amphibole in a subordinate amount. Coarse non-magnetic fraction> 0.03 mm in the tailings of plants presented hematite and quartz, dolomite and amphibole as the third major component (some (OMPE). Fine-grained non-magnetic fraction <0.03 mm is characterized by a small number of magnetite, which gets there concretions composed of quartz. Basically faction presented: quartz, hematite, illite, amphibole, dolomite. 4. The tailings of North and Central (OMPE) installed faction which concentrate rare earth elements (Ce, La, Y, Yb) – 437 grams per ton in electromagnetic fraction and 421 grams per ton in nonelectromagnetic fraction respectively . Also these tailings containing components such as iron, manganese, phosphorus, and therefore the component can be integrated beneficial micronutrients. 5. Analysis of the distribution of iron in the capacity of the Central (OMPE) showed that the central location along the dam slurry mass fraction of iron decreases as the distance from the point of testing primary pipeline position and location of cross dams reduce the mass fraction of iron as the distance from the dam can not be traced.
Key words: mining and processing enterprises (ompe), tailings dumps, waste products, grain size of the tailings, microelements.
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