There is a large amount of enrichment rare earth elements in Zhungeer coal and ash, making it possible to use fly ash as source for industrial production elements. In order optimize the leaching process increase rate, circulating fluidized bed Power Plant was used material, single factor test orthogonal were influence rate acid The factors discussed, results showed that when 3mol/L hydrochloric...

This study investigates vanadium extraction from steel converter slag the LD (Linz-Donawitz) process. has been used as an active bed material in a biomass boiler combustion technique called oxygen carrier aided (OCAC). usage could be compared to roasting step common roasting-leaching method for extraction. Leaching of prior use is undesirable materials OCAC are removed. successfully leached fol...

Leaching tests were conducted using sulfuric acid and sodium hydroxide solutions to remove impurities from domestic graphite concentrate. As a result of the leaching experiment solution solution, respectively, difference removal efficiency was insignificant when concentration or 2 mol/L more. The fixed carbon content increased with increasing temperature in leaching, while it remains constant a...

Abstract: In this paper, kinetics of reductive leaching of manganese dioxide ore by ferrous ion in sulfuric acid media has been examined. Experimental results show that increasing temperature from 20 to 60 °C and decreasing ore particle size from −16+20 to −60+100 mesh considerably enhance both the dissolution rate and efficiency. Molar ratios of Fe2+/MnO2 and H2SO4/MnO2 in excess to the st...

With excessive consumption of sulfide ores, using low-grade Pb-Zn mixed ores to obtain Zn has attracted more attention. Acid leaching is an effective method for recovery; however, a high concentration inorganic acid brings severe environmental issues, including acidic wastewater, contaminated soil, etc. Compared with acid, organic showed lower acidity and toxicity. Herein, we applied recovery f...

Plant biomass harvested after heavy-metal phytoremediation must be considered as a hazardous waste that should be contained or treated appropriately before disposal or reuse. This study provides an evaluation of extractants for the removal of lead from Abutilon Theophrastus biomass. The research was carried out a leaching study to determine the lead-extraction efficiency of the different leacha...

Biochar, the solid residual remaining after the thermochemical transformation of biomass for carbon sequestration, has been proposed to be used as a soil amendment, because of its agronomic benefits. The effect of amending soil with six biochars made from different feedstocks on the sorption and leaching of fluometuron and 4-chloro-2-methylphenoxyacetic acid (MCPA) was compared to the effect of...

In view of the problems high acid consumption, blockage ore-bearing beds caused by iron ion precipitation and a low leaching rate in conventional sandstone-type uranium deposit, author put forward “low-acid oxygen technology” research. order to further clarify mechanism ore with oxygen, oxidation ferrous under acidic conditions, influencing factors process, kinetic simulation oxidizing minerals...

The selective and simultaneous ion-exclusion chromatography (IEC) with UV-detection on a weakly acidic cation-exchange resin column in the H+ -form (TSKgel Super IC-A/C) was developed and applied for the simultaneous determination of phosphate and silicate ions as the water quality parameters required for optimizing the water-leaching process for ceramics glaze raw materials of natural origin i...

In the present study, porous alumina/silica materials were prepared by selective leaching of silicon/aluminum constituents from thermal-activated kaolinite in inorganic acid or alkali liquor. The correlations between the characteristics of the prepared porous materials and the dissolution properties of activated kaolinite were also investigated. The results show that the specific surface area (...