Leaching of rubidium from biotite ore by chlorination roasting and ultrasonic enhancement

Guo, Lin; Li, Jing; Zeng, Biao; Wang, Wei; Li, Chengzhi; Zhang, Libo

doi:10.1016/j.arabjc.2022.104275

Cited by 13 publications

(5 citation statements)

References 24 publications

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“…In the roast-water leaching process, silicate minerals containing Rb are roasted at 700–900 °C with oxides, chlorates, or sulfates as additives . The roasted clinker is immersed in solution, in which Rb + can be dissolved.…”

Section: Resultsmentioning

confidence: 99%

“…In the roast-water leaching process, silicate minerals containing Rb are roasted at 700−900 °C with oxides, chlorates, or sulfates as additives. 43 The roasted clinker is immersed in solution, in which Rb + can be dissolved. Yan 44 adopted Na 2 SO 4 and CaCl 2 as roasting additives to leach Rb with water, and the leaching rate could reach more than 90%.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Efficient Leaching of Rubidium from Biotite by Ion Exchange without Destroying the Lamellar Crystal Structure

Han,

Ran,

et al. 2023

ACS Sustainable Chem. Eng.

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Both the rare metal in the mica and the mica minerals are valuable resources. However, in order to obtain the rare metal during the conventional extraction process, the mica crystal has to be destroyed, which results in a lot of solid waste being generated and inefficient utilization of mica minerals. In this work, rubidium-bearing biotite (Rb-BB) was adopted to efficiently extract Rb through ion exchange. The influences of experimental conditions on the Rb leaching efficiency (L e (Rb)) were explored in detail. Under the optimal conditions of 0.6 g/g Mg(NO 3 ) 2 , 1.5 mol/L H 2 SO 4 , leaching temperature 363 K, leaching time 6 h, and liquid−solid rate 5:1 (mL/ g), L e (Rb) reached 95.6%. The microscopic process was characterized by virous characterization techniques. The results clearly revealed that the lamellar structure of biotite was still retained complete and Mg 2+ was enriched in the biotite layers after leaching. Compared with direct acid leaching, this process could reduce the consumption of H 2 SO 4 by 54.73% with the same L e (Rb). Furthermore, the leaching kinetics analyses showed that the enhanced extraction of Rb was a chemical-controlled process with an activation energy (E a ) of 43.62 kJ/mol. Therefore, this process provides a promising strategy for the efficient extraction of metals occurring in phyllosilicate minerals.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Efficient Leaching of Rubidium from Biotite by Ion Exchange without Destroying the Lamellar Crystal Structure

Han,

Ran,

et al. 2023

ACS Sustainable Chem. Eng.

Self Cite

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“…However, as ultrasonic power further increased, no significant change in the leaching rate of Zn was observed. The effect of low ultrasonic power on the cavitation and energy of the leaching agent and particles is not enough to effectively strengthen zinc dissolution, and the effect of high ultrasonic power will lead to the formation of a cavitation area at the liquid-solid surface interface, which is not conducive to the mass and energy transfer of the leaching solution, resulting in an insignificant ultrasonic effect [32]. Based on the above analysis, the ultrasonic power was set to 1000 W in the subsequent experiment i to facilitate zinc leaching.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…Ultrasound technology shows great potential application in metal leaching and recovery due to its unique mechanical vibration and cavitation effects. Ultrasonic is widely used in the recovery process of Zn [8,19,20], Pb [21], Cd [22], Ge [23][24][25], In [26,27], Ag [28], Cu [29,30], Mg [31], Rb [32], Au [33], Ga [20,25], etc., and relevant studies have shown that ultrasound has significant effects in terms of improving the reaction speed and metal extraction rate. Xin et al [12] studied the extraction of zinc and germanium from Gecontaining slag via ultrasound combined with oxygen leaching.…”

Section: Introductionmentioning

confidence: 99%

Mechanism Analysis and Experimental Research on Leaching Zn from Zinc Oxide Dust with an Ultrasound-Enhanced NH3-NH4Cl-H2O System

Ma,

Li,

Chang

et al. 2024

Sustainability

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Zinc oxide dust (ZOD) is an industrial solid waste produced in the production process of wet smelting Zn, with large output and great pollution to the environment. The recycling of metallurgical solid waste such as zinc oxide dust is very important to achieve the sustainable development of the circular economy. An experimental study of zinc (Zn) leaching from zinc oxide dust using an ultrasound-enhanced ammonia–ammonium chloride system was performed. The effects of ultrasonic power, leaching time, total ammonia concentration, and other factors on the leaching rate of zinc from zinc oxide dust were investigated. The results revealed that the leaching rate of Zn reached up to 80.70% under the condition of ultrasound power of 1000 W, reaction time of 15 min, total ammonia concentration of 6 mol/L, [NH3]:[NH4+] of 1:1, L/S of 5:1, temperature of 45 °C, and stirring speed of 100 r/min. The conventional leaching was conducted under similar conditions, except that the time was controlled to 40 min and the zinc leaching rate was 71.15%. The leaching rate of Zn in the ultrasound condition was improved by 9.55% compared with that in the conventional leaching process. XRD, laser particle size, and SEM-EDS analyses were conducted to study the leaching residues of ZOD. The analysis results showed that in the ultrasound condition, the largest leaching rate of soluble ZnO phases was achieved after 15 min of leaching. Under the ammoniacal system, it was difficult to leach ZnFe2O4, Zn2SiO4, and ZnS phases, which partly accounted for the low zinc leaching rate. Additionally, through ultrasound-enhanced treatment, the ZnO particles encapsulated in ZOD particles were broken into smaller sizes and exposed to the leaching solution. Thus, the leaching rate of Zn was improved. The experimental results show that ultrasound can tremendously improve the effect of Zn extraction from ZOD, shorten reaction time, and help reduce energy consumption and environmental pollution, making it a promising application in the treatment of secondary Zn resources.

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“…The SEM images before and after leaching under the optimal conditions are shown in Figure 4. It can be seen that the clay always maintained a layered structure after the calcination and leaching process, but the surface of the mineral became more blurred, which indicated that the structure of the clay was maintained, except for some minimal surface disso- The calcination time has an important effect on the leaching rate: an appropriate calcination time can ensure the crystal phase of the mineral completely transforms [29]. Figure 3b shows the change in metal leaching amount with calcining time.…”

Section: Morphology and Structure Of The Residuementioning

confidence: 99%

Efficient Extraction of Lithium from Calcined Kaolin Lithium Clay with Dilute Sulfuric Acid

Zhong,

Yang,

Rao

et al. 2024

Minerals

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In this study, the structure and phase transition of kaolin lithium clay at different calcination temperatures were studied and discussed; subsequently, the effects of Li leaching with sulfuric acid under various factors were investigated in detail. The experimental results indicated that an optimal Li leaching rate of 81.1% could be achieved when kaolin lithium clay was calcined at 600 °C for 1 h, followed by leaching with 15.0% sulfuric acid at 80 °C for 2 h. The TG-DSC, XRD, and SEM analyses showed that the layered structure of the clay was not destroyed during the leaching and calcination processes. During the process of calcination, kaolinite was converted to metakaolinite via dehydroxylation. During the process of leaching, the Al on the surface of the metakaolinite was dissolved by sulfuric acid, resulting in the destruction of the Al-O structure; then, Li+ was exchanged for H+ to the surface of the mineral and entered the solution under the action of diffusion. The leaching kinetics showed that the leaching process was controlled by a diffusion model, and the activation energy (Ea) was 41.3 kJ/mol. The rapid extraction of Li from calcined kaolin lithium clay with sulfuric acid leaching offers a high-efficiency, low-energy-consumption strategy for the utilization of new lithium resources.

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Leaching of rubidium from biotite ore by chlorination roasting and ultrasonic enhancement

Cited by 13 publications

References 24 publications

Efficient Leaching of Rubidium from Biotite by Ion Exchange without Destroying the Lamellar Crystal Structure

Efficient Leaching of Rubidium from Biotite by Ion Exchange without Destroying the Lamellar Crystal Structure

Mechanism Analysis and Experimental Research on Leaching Zn from Zinc Oxide Dust with an Ultrasound-Enhanced NH3-NH4Cl-H2O System

Efficient Extraction of Lithium from Calcined Kaolin Lithium Clay with Dilute Sulfuric Acid

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