kinetics of leaching selenium from nimo ore smelter dust selenium

Jul 04, 2013· FLOWSHEET DEVELOPMENT IN THE CONTEXT OF COPPER EXTRACTION Average percentage distribution of the accompanying elements in copper smelting. Element Matte Slag Flue dust Silver and gold 99 1 - Arsenic 35 55 10 Antimony 30 55 15 Bismuth 10 10 80 Selenium 40 - 60 Tellurium 40 - 60 Nickel 98 2 - Cobalt 95 5 - Lead 30 10 60 Zinc 40 50 10 Tin 10 50 40 ...

Selective leaching of aluminum takes place in aluminum bronze exposed to hydrouoric acid or acid-containing chlorides. Copper aluminum alloys containing more than 80% aluminum are particularly susceptible. Severe leaching of tin in tin bronzes in hot brine or steam, and of silicon from silicon bronzes in high-temperature steam, are other examples.

Because, the kinetics of the cathodic oxygen reaction on Alloy Al29-4C are considered to be essentially identical to those on Type 304L stainless steel, the parameters for Al29-4C were chosen for calculating the corrosion potential used in estimating the damage functions 28 Macdonald (Table 1).

Sintering machines are used to agglomerate ore fines, flue dust, and coke breeze for charging of a blast furnace. The use of this operation is presently declining at the rate of about 3.4 per- cent annually because of its inability to accomodate rolling mill scale which is contaminated with rolling oil.

PROCESS FOR PRODUCING PULVEROUS SELENIUM FROM RAW SELENIUM ABSTRACT OF THE DISCLOSURE A process for producing pulverous selenium from dried raw selenium by distillation, granulating the molten distillate, dripping it into water, grinding the granules, and drying the powder, in which the drying of the raw selenium before the distillation is by spray drying, the selenium granules …

Jan 03, 2021· Leaching kinetics of selenium from selenium–tellurium-rich. Feb 01, 2014· Kinetics of leaching selenium from Ni Mo ore smelter dust using sodium chlorate in a mixture of hydrochloric and sulfuric acids [J]. Hydrometallurgy, 2010, 104: 76 80. [14]

The effectiveness of leaching agents, such as NH 4 OH, (NH 4 ) 2 CO 3, and (NH 4 ) 2 S 2 O 8, for the extraction of Mo, V, Ni, and Al from the refinery spent catalyst has been reported as a function of reagent concentration (0.5 to 2.0 molar), leaching time (1 to 6 h), and temperature (35 to 60°C).

Uranium acid/carbonate leach plants Outokumpu and INCO flash smelters Copper, lead, zinc, nickel smelters Precious metal and copper refineries Dense media coal preparation plants Nickel hydromet and smelting processes Magnesium and aluminum processes Direct iron ore reduction processes

Heavy metals are naturally occurring elements that have a high atomic weight and a density at least 5 times greater than that of water. Their multiple industrial, domestic, agricultural, medical and technological applications have led to their wide distribution in the environment; raising concerns over their potential effects on human health and the environment.

Jan 01, 2019· INTRODUCTION Selenium in nature is mostly associated with metal sulfide minerals such as copper, iron, zinc, and lead sulfides (Zingaro & Cooper, 1974). The extraction of metals from ores has the potential for selenium contamination of ground and surface water which can pose an environmental and health concern.

There is provided a hydrometallurgical process of recovering indium and gallium values from mixtures thereof with other metal values for example recycled and scrap solar panel cells which comprises subjecting the mixture to strongly oxidizing acid conditions, preferably via the simultaneous addition of sulfuric acid and hydrogen peroxide to the leach vessel, so as to form indium and gallium ...

Jan 01, 2019· This paper presents a study (laboratory scale), of leaching the FSF dust, generated in Atlantic Copper Smelter using the weak acid bleed from the gas scrubbing/cooling section (GSCS) of sulfuric acid plants. Leaching was performed with 0.5 mol L-1 sulfuric acid concentration, 60ºC, and a solid/liquid ratio 1/3.

nbsp;Amorphous silica-aluminas (ASA) based NiMo and NiW sulfide and Pt hydrogenation catalysts were prepared and compared in toluene hydrogenation in... The nature of the sulfur tolerance of amorphous silica-alumina supported NiMo(W) sulfide and Pt hydrogenation catalysts

SX-EW processes can be tested from the ore leaching to the metal production. We have worked on a number of combined hydro/pyro flowsheets for processing a wide range of ores for clients. With autoclave capacity ranging from 1 to 20 litres, as well as a range of fluid bed and rotary reactors, KPM is well equipped to optimize gold extraction from ...

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The kinetics of leaching selenium from Ni–Mo ore smelter dust in H2SO4-HCl-H2O system was investigated. The effects including leaching temperature and…

A visual insight into the oxidation of sulfide minerals during bioleaching and chemical leaching of a complex ore, Mineral Processing and Extractive Metallurgy Review, Vol.31, No.3, 2010 Agrawal, A., and Sahu, K.K., Treatment of chloride waste pickle liquor by solvent extraction for the recovery of iron, Mineral Processing and Extractive ...

Jan 01, 2019· Kinetics of ionic liquid leaching of chalcopyrite vary substantially depending on the type and concentration of ionic liquid. Methanesulfonic acid (HCH3SO3) is one of the newest lixiviants available in leaching, having only been examined in the last decade.

Abstract The kinetics of leaching selenium from Ni–Mo ore smelter dust in H 2 SO 4 -HCl-H 2 O system was investigated. The effects including leaching temperature and time, particle size of the smelting dust, stirring speed, acid concentration and the coefficient β (the molar ratio of sodium chlorate to selenium in the smelter dust) on leaching of selenium were studied.

Feb 18, 2017· A new technique of swelling oxidizing roasting and alkaline leaching was proposed for deselenization and detellurization of precious-metal ore concentrates. Alkali-metal and alkaline-earth-metal chlorides and carbonates were preliminarily selected as swelling agents. The roasting removal rate and alkaline leaching rate of selenium and tellurium were investigated, and NaCl was selected as an ...

The kinetics equation of leaching selenium from Ni–Mo ore smelter dust was expressed as 1−(1−η)13=185.4exp(−44400RT)t, which coincided with the experimental results. View Show abstract

Selective leaching Se from selenium residue by Na 2SO 3 solutions and leaching kinetics February 2012 Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals 22(2):585-591

Jun 11, 2020· The reserves of Ni–Mo ore in China were estimated to be 52.2 million tons of Mo, 45.15 million tons of Ni, 510 tons of Au, 10,180 tons of Ag, 480 tons of Pd, 501 tons of rare metals and 2.05 trillion tons of P, which are equal to the Australian Olympic Dam mine ( Dong and Miao, 2008 ).

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The effectiveness of leaching agents, such as NH 4 OH, (NH 4 ) 2 CO 3, and (NH 4 ) 2 S 2 O 8, for the extraction of Mo, V, Ni, and Al from the refinery spent catalyst has been reported as a function of reagent concentration (0.5 to 2.0 molar), leaching time (1 to 6 h), and temperature (35 to 60°C). The optimal leaching conditions were ...

Feb 01, 2014· The leaching kinetics of selenium from selenium–tellurium-rich materials in sodium sulfite solutions was studied. The morphologies of selenium–tellurium-rich materials are mainly spheroid and columnar bodies and the range of particle size of selenium–tellurium-rich materials is between 17.77 μm and 56.58 μm, which contain 41.73% selenium and 40.96% tellurium.

The purpose of this study is to evaluate the impact of agitation speed on the leaching of waste copper from the smelter dust by an organic reagent citric acid as a new approach to the hydrometallurgical process of leaching. Sulphuric acid is the most

The kinetics of leaching selenium from Ni-Mo ore smelter dust in H 2 SO 4 -HCl-H 2 O system was investigated (Hou et al., 2010). The results indicated that the leaching of selenium increased ...

Oct 14, 2019· Water leaching of As2O3 from metallurgical dust containing various metals was investigated, serving the purpose of dearsenization and simultaneous metal enrichment especially for indium. Effects of leaching temperature, liquid/solid ratio (LSR) and leaching time were studied. It was found that the initial dissolution was very fast but was then so inhibited by the increasingly dissolved …

Dec 10, 2018· The heap leach module performs mass balances around the heap leach process including chemical reactions, precipitation and evaporation, solids and water inventories, and process controls. The model is non-steady state and generates time dependent plots of …