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2018-7-19 · Coal facies evolution of the main minable coal-bed in the Heidaigou Mine, Jungar Coalfield, Inner Mongolia, northern China. Science in China D: Earth Sciences. 2007, 50 (Supp. II): 144-152. [65] Shifeng Dai, Weiwei Li, Yuegang Tang, Yong Zhang, Peng Feng.

Study on the wear of spiral drum cutting coal containing ...

2021-10-4 · Currently, coal is among the most important energy sources and since the coal rock is generally found within the stone layer, the shearer pick is subjected to heavy loads during the extraction. Most frequently, the pick fails due to wear 1 ; thus, studying the spiral drum shearer wear is of great practical importance.

Mechanisms of Vanadium Recovery from Stone Coal by …

In this report, the vanadium recovery mechanisms by novel BaCO3/CaO composite additive roasting and acid leaching technology, including the phase transformations and the vanadium leaching kinetics, were studied. The purpose of this manuscript is to …

Recovery of vanadium from alkaline leaching solution …

2020-10-29 · recovery of vanadium from alkali leaching solutions. MATERIALS AND METHODS Materials The stone coal in this study is black and rock-like in appearance. This fuel with low calorific value can be treated as a polymetallic ore. It contains mostly quartz, illite, kaolinite, pyrite, and 18% organic matter with main chemical composition being 1% V 2 ...

Recovery of vanadium from alkaline leaching solution from ...

recovery from stone coal, especially for high alumino–silicate-containing refractory stone coal, still lacks sufficient scienti c evidence. In addition, the phase transformation and the ion leaching behavior during the recovery process require further investigation for the guidance and reference of this technology.

Leaching of vanadium from stone coal with sulfuric acid

Wang M.Y. et al., Leaching of vanadium from stone coal with sulfuric acid 3 ing ratio increases with an increase in mass ratio of H2SO4 to stone coal. 3.2. Effects of leaching temperature and time ...

(PDF) Synergetic valorization of basic oxygen furnace slag ...

2021-11-3 · Stone coal is a kind of low calori c value (4.18 MJ/kg) carbonaceous shale, which is classi ed as solid waste in the coal industry ( Dai et al., 2018 ).

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2017-6-9 · Main challenges of closed/abandoned coal mine resource utilization in China[J]. Energy Sources Part a-Recovery Utilization and Environmental Effects, Philadelphia: Taylor & Francis Inc, 2020, 42(22): 2822–2830. 4. *,,. CO 2 CH 4

2015-Recovery of vanadium and carbon from low-grade …

2015-12-2 · Li WANG, Wei SUN, Qing-peng ZHANG. Recovery of vanadium and carbon from low-grade stone coal by flotation. Transactions of Nonferrous Metals Society of China, 2015, 25(11): 3763-3773 2015-12-02 11:40 ()

Sulfuric acid leaching and recovery of vanadium from a ...

2020-1-1 · The leaching behaviors of V and Fe from a concentrate beneficiated from stone coal were investigated systematically. • By using powder Fe 2 O 3 as nucleating agent, the iron impurities in the pregnant solution were removed effectively.. V 2 O 5 powder with purity about 92.0 % was prepared, and the total recover rate of vanadium reached 85.0 %.

''Nothing else here'': Why it''s so hard for world to quit coal

2021-11-2 · Members of coal workers'' community fetch drinking water from a pipe at a coal depot near an open-caste mine in Dhanbad, an eastern Indian city in Jharkhand state, Friday, Sept. 24, 2021.

Separation and recovery of vanadium from a sulfuric-acid ...

2016-3-15 · Separation and recovery of vanadium from a sulfuric-acid leaching solution of stone coal by solvent extraction using Separation and Purification Technology ( IF 7.312) Pub Date : 2016-03-15 Xiao Yang, Yimin Zhang, Shenxu Bao, Chun Shen

Phase transformations of vanadium recovery from …

: The new mineral decomposition process of vanadium recovery from stone coal by low temperature sulphating roasting was proposed, which overcomes the shortages of high energy consumption and long working cycle existing in stone coal decomposition ...

Mechanisms of Vanadium Recovery from Stone Coal by …

In this report, the vanadium recovery mechanisms by novel BaCO3/CaO composite additive roasting and acid leaching technology, including the phase transformations …

Mechanism of Enhancing Extraction of Vanadium from …

In this paper, the extraction of vanadium from stone coal by roasting with MgO and leaching with sulfuric acid has been investigated, and the mechanism analysis of stone coal roasting with MgO was studied. The results indicated that under the conditions that the mass fraction of the particles with grain size of 0–0.074 mm in raw ore was 75%, the roasting temperature was 500 °C, the roasting ...

Extraction of vanadium from stone coal by roasting in a ...

2018-7-19 · stone coal is another important vanadium-bearing resource. In China, the gross reserve of vanadium in stone coal is estimated to be about 1.18 million tons. In terms of V 2O 5 amount, it takes more than 87% of China''s total domestic reserve of vanadium. In recent years, the V 2O 5 extracted from stone coal has reached 40% of the totally ...

Synergetic valorization of basic oxygen furnace slag and ...

2021-11-1 · Stone coal is widely distributed in southern China with a gross reserve of 61.88 billion tons (Dai et al., 2018). The main components of stone coal are identified as 45–70 wt% SiO 2, 10–20 wt% C, and 5–10 wt% Al 2 O 3 (Dai et al., 2018, Zhang et al., 2011).

Phase transformations of vanadium recovery from …

recovery from stone coal, especially for high alumino–silicate-containing refractory stone coal, still lacks sufficient scienti c evidence. In addition, the phase transformation and the ion leaching behavior during the recovery process require further investigation for the guidance and reference of this technology.

Surface Mining Methods and Equipment

2020-8-25 · The high labor intensity and cost associated with cutting stone makes quarrying the most expensive surface mining method. Highwall mining is a coal mining method for recovery of outcropped coal by mechanical excavation without removal of overburden. A continuous miner with single or multiple

Phase transformations of vanadium recovery from …

Phase transformations of vanadium recovery from refractory stone coal by novel NaOH molten roasting and water leaching technology. Zhenlei Cai * abc and Yimin Zhang * abcd a School of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China. E-mail: [email protected] .cn; [email protected] ; [email protected] b Hubei Provincial …

PRE-CONCENTRATION OF VANADIUM-BEARING MICA …

2016-12-27 · grade of stone coal is improved from 0.7% to 0.8%, the cost of producing 1 t of V 2 O 5 will increase profits by 29% (Ning et al., 2010, Zhao et al., 2013). Hence, the vanadium pre-concentration of stone coal may improve vanadium recovery and reduce …

The Absorption and Distribution of Heavy Metals of ...

2021-9-9 · etc. [3, 4]. Stone coal is animportant V resource[2, 5]. Then, the increasing exploitation of stone coal mines led to form a lot of bare slopes and waste piles exposing to the environ-ment [6, 7]. Many exposed high escarpments derived from the mining of stone coal were exposed to atmospheric oxy-gen, which resulted in acidic mine discharge (AMD ...

Bioleaching and biosorption behavior of vanadium …

2021-8-5 · The recovery of vanadium (V) from stone coal by bioleaching is a promising method. The bioleaching experiments and the biosorption experiments were carried out, aiming to explore the adsorption characteristics of Bacillus mucilaginosus (B. mucilaginosus) on the surface of vanadium-bearing stone coal, and the related mechanisms have been investigated.

Extracting vanadium from stone-coal by oxygen pressure ...

2012-10-23 · Extractingvanadium from stone-coal oxygenpressure acid leaching solventextraction DENG Zhi-gan (), WEI Chang ( FANGang ( LIMin-ting (), LI Cun-xiong (), LI Xing-bin () Faculty EnergyEngineering, Kunming University Technology,Kunming 650093, China Received July2009; accepted 30 December 2009 Abstract ...

A Novel Technology of Vanadium Extraction from Stone …

The total recovery of vanadium reached 76.3%, which was higher than the current applied technology. The novel technology was environmentally-friendly and could extract vanadium from the stone coal, in which the content of V 2 O 5 was less than 0.8%.

Selective recovery of vanadium and scandium by ion ...

D201 resin and P507 extractant diluted with sulfonated kerosene were used to respectively separate vanadium and scandium, and impurity ions from hydrochloric acid leaching solution of red mud. More than 99% of vanadium was selectively adsorbed from the hydrochloric acid leaching solution under the c …

No coal, no current

2021-10-29 · No coal, no current – Will we go back to the Stone Age? By Telangana Today. Published: 29th Oct 2021 7:33 pm. On October 6, a shortage of coal in India was reported – only 4 days'' worth of coal reserves was remaining. More than half the power stations in India were on the alert for outages.

Extraction of vanadium from stone coal by modified salt ...

2011-11-16 · high recovery of vanadium, this technology has been widely applied to treat stone coal in many places for over 40 years. However, the released exhaust gas containing ...

By the numbers | Countries still committed to coal

2021-10-26 · By the numbers | Global recovery to pre-pandemic GDP per capita. China was the first country to deal with Covid, allowing it to respond quickly and economically recover at …