The fly ash (FA) from the combustion of heavy oil in power stations is characterized by fine particles containing toxic metals. The sample utilized in this study was gathered from the dust precipitators of seven heavy-oil-consuming Iranian power plants. Substantial quantities of heavy metals, partic …
Processing of vanadium-containing flyash was investigated by Pickles and Alcock (1983). An extended arc flash reactor was employed to treat a flyash containing about 8% NiO …
A study of the extraction of vanadium and nickel in oil-fired fly ash … countries require companies to process the ... Vanadium recovery from oil fly ash by … Vanadium recovery from oil fly ash by leaching, precipitation and solvent extraction processes [An article from: Waste Management] [R. Navarro, J. Guzman, I. ...
US3873669A US368053A US36805373A US3873669A US 3873669 A US3873669 A US 3873669A US 368053 A US368053 A US 368053A US 36805373 A US36805373 A US 36805373A US 3873669 A US3873669 A US 3873669A Authority US United States Prior art keywords ash solution reaction vanadium caustic soda Prior art date Legal status …
A process has been developed to recover gallium and vanadium from coal fly ash in which they exist at very low concentration in a mixture of high concentration of less desirable species. Aqueous solution containing 2.8 mg/l gallium and 35 mg/l vanadium was obtained by leaching with 1.5 mol/l sulfuric acid.
The article presents an overview of the basic technologies employed for the processing of these vanadiumu0002containing materials. These technologies encompass a range of extraction methods, including roasting, leaching, solvent extraction, and precipitation. The specific techniques employed for each source material are discussed in detail, highlighting …
The current research examines the recovery of valuable elements (Ge, V, and Li) from fly ash to mitigate the negative environmental consequences of fly ash disposal while also maximizing economic processing. This study developed sequential sodium salts roasting and organic acid leaching process to recover germanium, vanadium, and lithium from CFA.
Several processes are reported in the literature for extracting vanadium from the fly ashes, such as roasting vanadium bearing materials in the presence of sodium salt, combined with …
Through the burning process, the vanadium was released and enriched in fly ash. Because of particular vanadium migration behaviors, the distribution of vanadium in …
common digestion methods of y ash for extraction of heavy metals involve the use of aqua regia solution (3:1 HCl–HNO 3 ) and reverse aqua regia solution (1:3 HCl–HNO 3 ).
The fly ash produced by oil sands operations in northern Alberta represents a large, high grade, potential resource for vanadium production in Canada. After extensive batch testing, a conceptual process flow sheet for the recovery of …
The vanadium in fly ash mainly existed in organic matter, aluminosilicate and Fe–Mn oxides, and the other vanadium existed in exchangeable fraction. Through the burning process, the vanadium was released and enriched in fly ash. Because of particular vanadium migration behaviors, the distribution of vanadium in phases became more scattered ...
The steadily growing demand for non-ferrous metals, a shift to heavier crude oil recovery and tightened environmental standards have increased the importance of heavy petroleum feedstock (HPF) as a raw source of metals. This paper reviews the recent developments in the recovery of vanadium and nickel from HPF. During crude oil processing …
Semantic Scholar extracted view of "Valorization of fly ash by nickel ferrite and vanadium oxide recovery through pyro-hydrometallurgical processes: Technical and environmental assessment." by A. Hamidi et al. ... A process for recovering V and Ni from oil fly ash and for making the ash harmless has been developed. More than 80% of V and Ni are ...
Petroleum fly ash is a solid residue generated in the power plants using crude oil and petroleum coke as fuel, which is a valuable resource for vanadium. Stricter environmental regulations and sustainable material utilization demand high vanadium
Along with the studies on Ga, potential extraction of vanadium from this fly ash was also investigated. Vanadium is commonly recovered from titaniferous magnetite ores and as V 2 O 5 from by-products of crude oil, being mainly used to produce high-strength and low-alloy steels [22].Since 50:50% coal/petcoke blend is gasified in Puertollano IGCC plant, fly ash is …
In order to reduce the environmental impact due to land disposal of oil fly ash from power plants and to valorize this waste material, the removal of vanadium was investigated using leaching processes (acidic and alkaline treatments), followed by a second step of metal recovery from leachates involving either solvent extraction or selective precipitation.
a process for the treatment of fly ash derived from petroleum of bituminous products to recover vanadium oxide present in the ash by the formation of a soluble vanadate comprising reacting the ash with a solution of caustic soda containing 1 to 5 moles of Na- O per liter for the period within the range of 4-8 hours and a temperature within the range of between 50C and the …
The recovery of vanadium from petroleum fly ash is a well established process based on relatively simple leaching operations. In Canada in 1965, Bechtel Corp. built a plant for …
Thermal processing of petroleum fly ash for vanadium recovery. Conference paper (2010) Authors. Y. Xiao Light Metals Processing HK Jalkanen Light Metals Processing Y. Yang Light Metals Processing MCR Mambote Light Metals Processing R. Boom Light Metals ...
Petroleum fly ash is a solid residue generated in the power plants using crude oil and petroleum coke as fuel, which is a valuable resource for vanadium. ..., 19–23, DOI: 10.3103/S1067821211010251. 13 R. R. Moskalyk and A. M. Alfantazi, Processing of vanadium: a review, Miner. Eng., 2003, 6(9), 793–805, DOI: 10.1016/S0892-6875(03)00213-9 ...
Several processes have been developed and reported in the literature for extracting vanadium from the fly ash, such as salt roasting combined with alkaline or acidic leaching; or …
The objective is to develop a sustainable processing technology, and further to minimize the environmental foot-print in the metallurgical industry. Two waste ash residues are ... the free carbon and the source of vanadium in the fly ash; the source of iron and the high lime content in the BOF flue dust. Addition of sand as a fluxing agent or ...
Thermal Processing of Petroleum Fly Ash for Vanadium Recovery PDF. Normal price $22.00. Member price from $0.00. Add to cart. Fees above are GST inclusive. PD Hours. Approved activity Published: 2009; PDF Size: 1.793 . Unique ID: P201007180; Share: Our site uses cookies. We use these to improve your browser experience. ...
Vanadium is essential to produce high-performance alloys, catalysts, and electrodes of redox flow batteries [].However, current strategies to extract vanadium from its natural ores (V-Ti magnetite ore, uranium ore, phosphate) and industrial by-products (oil residues, power station fly ash, spent catalysts, red mud) are resource and pollution intensive [2,3,4].
The leaching process can be acidic or alkaline, but due to this fact that in the initial material of fuel fly ash, in addition to vanadium there are other varieties such as Al, Si, Cr, Fe, Ni, Mg, Zn, the acidic leaching does not seem to be a right choice because the ability of dissolving a various range of stable waste's compounds which are ...
Vanadium recovery from oil fly ash by leaching, precipitation and solvent extraction processes
Recovery of vanadium and nickel from an oil fly ash is studied in a two-step leaching process, carried out under ambient pressure without calcination. In the leaching, nickel is dissolved with NH4Cl ...
In order to reduce the environmental impact due to land disposal of oil fly ash from power plants and to valorize this waste material, the removal of vanadium was investigated using leaching …
It is important to mention that most of the metals present in fuel oil fly ash are non-process elements, i.e., those elements that have no active part in the process (fuel burning in our case). The nonprocess elements should be monitored and controlled as they may lead to operating drawbacks as well as dead load [6,7].
Akita et al. 50 studied the recovery of nickel and vanadium from oil fly ash in a two-step leaching process. Ni is leached with NH 4 Cl solution in the first step, followed by Na …