Distribution of rare earth and selected trace elements in combustion products of Yerkovetskoe brown coal deposit (Amur Region, Russia)

Abstract

Major, trace, rare-earth elements, and noble metal have been analyzed from the brown coal of the Amur region (Russian Federation) and coal combustion products to understand the provenance and depositional environment. It was discussed that weathering crusts of ore deposits and host rocks located in the mountain-folded frame of the Zeya-Bureya coal-bearing sedimentary basin were the main source of mineral substance and chemical elements in brown coals. The distribution of minerals and elements inside the forming coal seams was influenced by the type of vegetation incorporated into coal-forming peat mires bog by catastrophic floods along the existed hydraulic network, the physicochemical parameters of plant debris transformation during their conversion to coal, as well as the sorption properties of inclusions and interlayer of bitumen and humic acids in coal beds. An experimental technological complex was created to study the microelements transfer process in the dust-gas stream and the distribution of rare earth and trace elements separately in varieties of coal combustion products (slag, fly ash, dustlike part of the dust-gas flow, and technogenic cleaning water). The resulting combustion products of coal have been studied by inductively coupled plasma (ICP)-spectrometry methods (ICPmass spectrometry and ICP-atomic emission spectroscopy). Sample preparation technique for analysis was improved to determine the elemental composition. It was established that more than 60% of trace and rare earth elements were concentrated in ash and sludge. Data on these

Gold-Bearing Brown Coal Deposits of the Zeya–Bureya Sedimentary Basin (East Russia): Fundamental Model of Formation

“…The separation of the coal combustion products (CCPs) was carried out at the "Amur" Experimental Technological Complex (ETC), as per procedures given by Sorokin et al [18,26].…”

“…The liquid phase entered the filtered block for further purification. The experiments were carried out in the process of burning large-volume coal samples weighing 240-270 kg from the Erkovetskoye, Raichikhinskoye, and Arkharo-Boguchanskoye deposits along with the production of furnace slag, fly ash, and sludge [18,26].…”

Potentially Economic Concentrations of Rare Earth Elements and Gold in Power Plant Coal Combustion Products (Far East, Russia)

“…Table 6. REE distribution (ppm) in coal combustion by-products of the "Amur" ETC, ppm (Sorokin et al, 2019) The following operating temperature ranges were used during coal combustion: at the outlet of the furnace chamber -650-1050°C, the afterburn chamber -610-750°C, the fly-ash collector -up to 250°C, and moisture collector -no more than 60°C.…”

“…They have gram amounts of Au and high (400-500 ppm) concentrations of REEs in coal ashes (Seredin, 2004(Seredin, , 2007Kuz;inykh and Sorokin, 2004;Sorokin et al, 2012Sorokin et al, , 2019Vyalov et al, 2010Vyalov et al, , 2017Nezhenskii et al, 2013). According to V.I.…”

Forms of Ore Component Occurrence and Conditions of Their Transport Into Brown Coals Within the Zones of Contrast Junction Between Sedimentary Basins and Orogens Using the Zeya-Bureya Basin and Turan Massif as an Example (Far East, Russia)

“…В процессе изучения зоны сопряжения Зейско-Буреинского бассейна и Туранского массива авторами были также проанализированы материалы среднемасштабного геологического картирования [11,18,19,35], монографии по рудным месторождениям, россыпному золоту, буроугольным месторождениям [3,4,26,36], геохимическим исследованиям с оценкой ресурсного потенциала, вынесенного с Туранского массива в область аккумуляции [7]. Кроме этого в предлагаемой статье использованы авторские материалы последних лет по изучению металлоносности угленосных отложений, в том числе Ерковецкого, Райчихинского и Архаро-Богучанского месторождений [29,32,43].…”