Experimental Study on Concentrating Scandium by Leaching from Associated Scandium Ore

Based on the benefication of the complex silicate ore containing scandium, the research about aid-leaching agent used in the leaching of the scandium concentrate was been conducted. And the suitable leaching agent and aid-leaching agent which the useful ions entered into leaching liquid and the harmful ions were kept in leaching residue were been found according to the experiment results. For the scandium of sample existed various complex silicate ore as isomorphism form, the research has adopted hydrochloric acid with aid-leaching agent to dissociate the silicate ore and make scandium entering into solution. The research results has shown that the scandium leaching rate could reach 92.06% under the optimal conditions which the hydrochloric acid concentration is 22.8%, the dosage of aid leaching agent is 6%, liquid solid ratio is 4:1, particle size of leaching material totally is less than 0.15mm and leaching time is 8h.

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Research on the Extract Al2O3 from Coal Gangue

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.524-527.1947 ◽

2012 ◽

Vol 524-527 ◽

pp. 1947-1950 ◽

Cited By ~ 2

Author(s):

Lei Zhang ◽

Hao Wang ◽

Yu Li

Keyword(s):

Hydrochloric Acid ◽

Aluminum Oxide ◽

Acid Concentration ◽

Acid Leaching ◽

Coal Gangue ◽

Hydrochloric Acid Concentration ◽

Leaching Rate ◽

Mass Ratio ◽

Sample Mass ◽

Solid Ratio

The experiments selected Wang Taipu gangue as raw materials and adopted single factor experimental method to study the leaching of aluminum oxide from gangue by using hydrochloric acid as leaching medium. The experiments studied solvent/sample mass ratio, hydrochloric acid/sample, liquid-solid ratio, hydrochloric acid concentration, leaching time and leaching temperature on Al2O3 leaching rate of coal gangue. Through the parallel experiment of the above factors, we can found that optimization conditions of hydrochloric acid leaching of alumina were: solvent /sample mass ratio: 0.20, solvent: NaF, liquid-solid ratio: 1:10, hydrochloric acid concentration: 6mol/L, leaching time: 150min, leaching temperature:110°C. In this case, the aluminum oxide of optimal leaching rate was 79.33%.

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Effect of Spinning Process on the Absorption Performance of Wooden Activated Carbon Fiber for Methylene Blue

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.469.117 ◽

2013 ◽

Vol 469 ◽

pp. 117-120 ◽

Cited By ~ 2

Author(s):

Fan Zhang ◽

Xiao Jun Ma

Keyword(s):

Methylene Blue ◽

Activated Carbon ◽

Hydrochloric Acid ◽

Acid Concentration ◽

Absorption Capacity ◽

Activated Carbon Fiber ◽

Hydrochloric Acid Concentration ◽

Solid Ratio ◽

Spinning Process ◽

Absorption Performance

In order to improve the adsorption performance of wooden activated carbon fibers (WACFs) and enlarge its application in food safety and fresh, the charcoal dust is used as pore-forming agent, and the absorption performance of WACFs for methylene blue (MB) by changing the liquid-solid rate, charcoal content, synthetics content and hydrochloric acid concentration is studied. The results show that: with the increase of liquid-solid ratio, the absorption capacity of WACFs for MB increases accordingly; with the increase of charcoal content and synthetics content, the absorption capacity both show the tendency of increasing first then reducing after accordingly, with the maximum absorption capacities of 534.61mg·g-1and 527.25mg·g-1respectively reached by 1% charcoal content and 4% synthetic content. When the hydrochloric acid concentration was below 15%, the absorption capacity increases linearly, while reduced when hydrochloric acid concentration was over 15%.

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Leaching of lead from sphalerite concentrate direct leaching residue by hydrochloric acid and sodium chloride for preparation of lead oxides

Journal of Mining and Metallurgy Section B Metallurgy ◽

10.2298/jmmb191111013f ◽

2020 ◽

Vol 56 (2) ◽

pp. 247-255

Author(s):

Y.-Y. Fan ◽

Y. Liu ◽

L.-P. Niu ◽

T. Jing ◽

T.-A. Zhang

Keyword(s):

Sodium Chloride ◽

Hydrochloric Acid ◽

Chloride Concentration ◽

Sodium Oxalate ◽

Hydrochloric Acid Concentration ◽

Solid Ratio ◽

Oxide Powders ◽

Optimum Parameters ◽

Leaching Residue ◽

Direct Leaching

The purpose of this study was to select and propose an applicable method for extracting lead from sphalerite concentrate direct leaching residue. A large number of experiments were conducted to extract lead from sphalerite concentrate direct leaching residue by hydrochloric acid and sodium chloride solution as leachates. The main optimum parameters were determined, such as a liquid-solid ratio of 17.5-1, a reaction temperature of 85?C, an initial hydrochloric acid concentration of 1.3 mol/L, an initial sodium chloride concentration of 300 g/L, and a reaction time of 60 min. Ninety-five percent of the zinc, 96.0% of the iron, and 93.7% of the lead were extracted into leachate at the optimum conditions. The lead in the leachate was in the form of [PbCl4]2-. After the leachate was purified to remove impurities, it was converted into lead oxalate by sodium oxalate as a precipitant. Finally, lead oxalate was decomposed to obtain lead oxide powders via a high-temperature calcination process.

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Decomposition of polyhalite with hydrochloric acid

Proceedings of the National Academy of Sciences of Belarus Chemical Series ◽

10.29235/1561-8331-2021-57-3-340-345 ◽

2021 ◽

Vol 57 (3) ◽

pp. 340-345

Author(s):

V. V. Shevchuk ◽

T. N. Potkina ◽

O. V. Smetanina

Keyword(s):

Hydrochloric Acid ◽

Acid Concentration ◽

Process Temperature ◽

Crystal Formation ◽

Hydrochloric Acid Concentration ◽

Magnesium Ions ◽

Optimal Conditions ◽

Useful Components ◽

Poorly Soluble ◽

Hcl Concentration

Due to the fact that polyhalite ores are poorly soluble in water, it was of interest to study the method of their processing using acids. The influence of polyhalite size, the hydrochloric acid concentration and consumption, the ratio of L: S, the temperature and time of mixing the pulp on the useful components extraction into the solution have been studied. The optimal conditions for the decomposition of polyhalite with hydrochloric acid have been determined. The degree of useful components extraction into the solution depends on the concentration of hydrochloric acid or on the L:S ratio of the pulp, but in all cases the decomposition of polyhalite occurs without secondary crystal formation, as evidenced by the same degree of potassium and magnesium ions extraction. The degree of potassium and magnesium ions extraction from polyhalite into solution increases with decomposition process temperature, an increase in the consumption of acid and the duration of the reagents interaction, and decreases with increasing acid concentration. The CaSO4 content in the solution increases sharply with an increase in the HCl concentration and is practically independent of the process temperature. Hydrochloric acid extract can be used for phosphate raw decomposition in order to obtain complex fertilizers.

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Experimental Study of Leaching Scandium from Chloride Dust

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.548.305 ◽

2012 ◽

Vol 548 ◽

pp. 305-308 ◽

Cited By ~ 1

Author(s):

Song Li Liu

Keyword(s):

Experimental Study ◽

Particle Size ◽

Chemical Analysis ◽

Dust Particle ◽

Acid Concentration ◽

Orthogonal Experiment ◽

Raw Material ◽

Solid Ratio

Scandium is concentrated in the dust during TiO2 chlorization. The dust can be used as a raw material from which Scandium is extracted. Scandium leaching conditions such as leaching acid concentration , liquid-solid ratio , leaching temperature and leaching time is investigated with chemical analysis through the orthogonal experiment. The results show that the optimum leaching conditions is: chloride dust particle size is 44 μ m, leaching acid concentration is 15%, liquid-solid ratio is 2:1, leaching temperature is 28 °C, leaching time is 1 h.

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Research of Al and Fe Leaching Rate in the Process of Slag Leaching by Hydrochloric Acid

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.675-677.1417 ◽

2014 ◽

Vol 675-677 ◽

pp. 1417-1420

Author(s):

Guang Qiang Mang ◽

Ming Cheng

Keyword(s):

Blast Furnace ◽

Reaction Time ◽

Hydrochloric Acid ◽

Acid Concentration ◽

Reaction Temperature ◽

Acid Leaching ◽

Hydrochloric Acid Concentration ◽

Leaching Rate ◽

Furnace Process ◽

Leaching Condition

Smelting slag from mineral process and blast furnace process to vanadium titanium magnetite is a kind of precious secondary resource in which TiO2 content is higher than 20%. Taking titanium-bearing blast furnace slag in Panzhihua region as research object, this paper analyzes four factors that affect the leaching rate of Al and Fe. The four factors are reaction temperature, reaction time, acid concentration, and the ratio of acid and slag. The conclusion drawn from hydrochloric acid leaching experiment is the factor that causes greatest effect to leaching rate of Al and Fe is reaction temperature, then reaction time follows. Acid concentration and the ratio of acid and slag cause insignificant affect. Appropriate leaching condition is 5h reaction time, 5mol/L hydrochloric acid concentration, 90°C~100°C reaction temperature and 1.2 the ratio of acid and slag. Max leaching rate of Al and Fe is 78.5% and 65.8% respectively.

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Experimental Study on Alkali Decomposition of Low Grade Tungsten Concentrates under Microwave Heating

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.291-294.2625 ◽

2013 ◽

Vol 291-294 ◽

pp. 2625-2630 ◽

Cited By ~ 1

Author(s):

Qing Yun Zeng ◽

Zi Yan Zhang ◽

Xi Qing Zhang

Keyword(s):

Experimental Study ◽

Particle Size ◽

Sodium Hydroxide ◽

Microwave Heating ◽

Electric Heating ◽

Low Grade ◽

Temperature Reaction ◽

Leaching Rate ◽

Sodium Hydroxide Concentration ◽

Solid Ratio

Decomposition of the low-grade mixed Scheelite and Wolframite concentrate in sodium hydroxide was carried out under microwave and isothermal conditions. Experimental results showed that the leaching rate of tungsten was mainly affected by reaction temperature, reaction time, and tungsten grain size. The experiment was carried out at a temperature of 105 °C, 550 g•L-1sodium hydroxide concentration, liquid to solid ratio of 30:1, the holding time of 150min, stirring speed of 600rpm, particle size of 0.040-0.054mm, intensified by microwave. As a result, tungsten leaching rate can reach 99.53%. Compared with ordinary electric heating, microwave heating alkali decomposition of tungsten concentrate can save time.

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