Showing papers by "Runqing Liu published in 2014"
TL;DR: In this paper, a pre-concentration of vanadium from low-grade stone coal by the method of desliming-flotation was investigated, and the results showed that selective separation of vananium-bearing minerals can be achieved by flotation in acidic solution using melamine (EA).
38 citations
TL;DR: In this paper, the adsorption mechanisms of three kinds of amines on muscovite and quartz were studied by FT-IR spectrum analysis, contact angle measurement and molecular dynamics simulation.
Abstract: Flotation experiments were performed to investigate the separation of muscovite and quartz in the presence of dodecylamine (DDA), tallow amine (TTA) and dodecyltrimethylammonium bromide (DTAC). The adsorption mechanisms of these three kinds of amines on muscovite and quartz were studied by FT-IR spectrum analysis, contact angle measurement and molecular dynamics (MD) simulation. The results reveal that the separation of muscovite from quartz is feasible at strong acid pulp condition using amine collectors. TTA and DTAC show poorer collecting ability for flotation of the two minerals compared with DDA. Physical adsorption is found to be the main adsorption module of amine collectors on muscovite and quartz by FT-IR analysis. MD simulation results show a strong physical adsorption ability of DDA+ cation on muscovite and quartz (muscovite (001): −117.31 kJ/mol, quartz (100): −89.43 kJ/mol), while neutral DDA molecular can hardly absorb onto the surface of these two minerals. These findings provide a novel explanation for the flotation mechanism from the perspective of MD simulation.
15 citations
Patent•
24 Sep 2014
TL;DR: In this paper, a method for extracting vanadium from high-calcium vanadium-containing siliceous shale is proposed. But the method is not suitable for industrial applications.
Abstract: The invention relates to a method for extracting vanadium from high-calcium vanadium-containing siliceous shale, belonging to the technical field of vanadium ore separation of siliceous shale The method comprises the following steps: breaking ore to be less than 3mm, grading, and processing the high-calcium vanadium-containing siliceous shale in an operating way of selecting calcium at first and then selecting vanadium, so that enrichment and recovery of calcium and vanadium are realized The grade of calcium oxide in obtained calcium ore concentrate is 5-75 times that of calcium oxide in original ore; the grade of vanadium pentoxide in obtained vanadium ore concentrate is 18-24 times that of vanadium pentoxide in the original ore; tailings account for 60wt%-65wt% of the original ore; the total recovery rate of calcium is 70%-82% and the total recovery rate of vanadium is not less than 73% The method is simple to operate, high in practicality and convenient for industrialized application
8 citations
Patent•
12 Nov 2014
TL;DR: In this paper, a method for extracting V2O5 and carbon from a low-carbon coal mine is presented, which belongs to the field of beneficiation and metallurgy united technology.
Abstract: The invention relates to a method for extracting V2O5 and carbon from a low-carbon stone coal mine, and belongs to the field of beneficiation and metallurgy united technology. According to the method, the low-carbon stone coal mine with the grade of V2O5 larger than or equal to 0.65% and the mass percentage of carbon smaller than or equal to 18% is taken as the raw material, flotation enrichment is performed on carbon and vanadium respectively, industrial fuel with the combustion value of 2,400-3,100 cal/g as well as a vanadium-rich solution is obtained through leaching, and V2O5 is obtained by subjecting the vanadium-rich solution to purification, dissolving, vanadium precipitation and calcination. According to the technology, a pollution-free smelting process is performed through flotation enrichment of carbon and vanadium in stone coal, the smelting treatment quantity is reduced, carbon resources in the stone coal are used sufficiently, the production cost and investment cost are reduced, the total V2O5 recovery rate can reach 78%-82%, the utilization rate of carbon can reach 70%-85%, the low-carbon stone coal mine with low V2O5 grade can be treated, and the method has the advantages of low production cost, environment friendliness and the like and facilitates industrial application.
2 citations
Patent•
03 Sep 2014
TL;DR: In this paper, the authors proposed a slurry electrolysis method for extracting vanadium from scherbinaite-containing coal mine by using water-soluble chlorine salt in an electrolytic cell.
Abstract: The invention relates to a technology for extracting vanadium from scherbinaite-containing coal mine by a slurry electrolysis method, and belongs to the technical field of hydrometallurgy of vanadium. The technology comprises the following steps: adding water-soluble chlorine salt into slurry in an electrolytic cell by taking alkaline scherbinaite-containing coal slurry as a raw material according to the mole ratio of Cl to V = (2-3) to 1, stirring and electrolyzing under the condition of introducing oxygen-containing gas; and controlling the cell voltage to be 4.5-6V and the current density to be 10-40A/dm in electrolysis. In electrolysis by introducing the gas, chlorine generated in an anode region acts as an oxidizing agent for leaching vanadium; air is ceaselessly introduced into a cathode region; oxygen in air in the cathode region reacts to generate OH ions so as to provide an alkaline environment for leaching vanadium; meanwhile, the explosion generated by the hydrogen evolution reaction in the cathode region and chlorine generated in the anode region can be prevented. According to the technology disclosed by the invention, the leaching rate of vanadium is greater than or equal to 90%, and the electrolytic current efficiency is greater than or equal to 95%. The technology provided by the invention has the advantages of short flow, high efficiency, low cost, high resource utilization ratio, environmental friendliness, safety and the like, and is convenient for industrial application.
2 citations
Patent•
10 Sep 2014
TL;DR: In this paper, a technique for leaching molybdenum from nickel-moly bdenum ores by a wet process, belonging to the technical field of wet-process smelting of molybenum, was proposed.
Abstract: The invention relates to a technique for leaching molybdenum from nickel-molybdenum ores by a wet process, belonging to the technical field of wet-process smelting of molybdenum. The technique comprises the following steps: by using nickel-molybdenum ore pulp as the raw material, adding water-soluble chlorine salt into the pulp in a Cl :Mo mole ratio of (2-3):1, stirring, and carrying out electrolysis under the condition of introducing oxygen-containing gas, wherein the bath voltage in the electrolysis process is 5-7.5V, the current density is 20-50 A/dm , and the electrolysis temperature is 40-60 DEG C. By using the pulp electrolysis technique to leach the molybdenum, the molybdenum leaching rate is greater than or equal to 95%, and the electrolysis current efficiency is greater than or equal to 90%; and the technique can effectively and comprehensively recover molybdenum in the nickel-molybdenum ores and enhance the molybdenum resource utilization ratio. The technique has the advantages of low reaction temperature, high reaction speed, low energy consumption, high economy, environmental protection, high safety and high molybdenum leaching rate, and is convenient for implementing industrial application.
1 citations