Nucleation and morphology of sodium metaborate dihydrate from NaOH solution

Qin, Shiyue; Zhang, Yifei

doi:10.1016/j.jcrysgro.2015.10.012

Cited by 10 publications

(4 citation statements)

References 28 publications

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“…As an important ore resource, boron deposit is the basic raw material for the production of borax [1,2], boric acid [3,4] and a series of other boron and boride products [5,6], which are widely used in fields such as chemicals, metallurgy, building materials, electrical appliances, machinery, agriculture, nuclear industry and medicine [7–10]. The global boron ore resources are relatively concentrated, and there are few countries with boron resources.…”

Section: Introductionmentioning

confidence: 99%

“…As an important ore resource, boron deposit is the basic raw material for the production of borax [1,2], boric acid [3,4] and a series of other boron and boride products [5,6], which are widely used in fields such as chemicals, metallurgy, building materials, electrical appliances, machinery, agriculture, nuclear industry and & 2018 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.…”

Section: Introductionmentioning

confidence: 99%

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Effects of sodium roasting on the leaching rate of boron-bearing tailings and its mechanism analysis

et al. 2018

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The study reported was intended to improve the leaching rate of boron-bearing tailings, using a method of sodium roasting that uses boron-bearing tailings as the raw material and Na2CO3 as the sodium agent. The effects of the roasting temperature and Na2CO3 amount on the leaching rate of boron-bearing tailings are mainly evaluated. The morphology and composition of the samples after sodium roasting are analysed by scanning electron microscopy and X-ray diffraction. The results show that sodium roasting can significantly improve the leaching rate of boron-bearing tailings. Under the optimal conditions where roasting temperature is 950°C, Na2CO3 amount is five times the theoretical amount and roasting time is 2 h, the leaching rate of boron-bearing tailings is up to 86.78%. Based on the analysis of the characterization results and the mechanism analysis of the sodium roasting process, the main reason for the increase of leaching rate is the reaction between Na2O produced by the decomposition of Na2CO3 and the boron in boron-bearing tailings resulting in soluble sodium borate. The results provide a scientific basis for the efficient comprehensive use of boron-bearing tailings.

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Section: Introductionmentioning

confidence: 99%

“…As an important ore resource, boron deposit is the basic raw material for the production of borax [1,2], boric acid [3,4] and a series of other boron and boride products [5,6], which are widely used in fields such as chemicals, metallurgy, building materials, electrical appliances, machinery, agriculture, nuclear industry and & 2018 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.…”

Section: Introductionmentioning

confidence: 99%

Effects of sodium roasting on the leaching rate of boron-bearing tailings and its mechanism analysis

et al. 2018

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“…At a temperature lower than the melting of sodium carbonate (851 • C), the soda-ash roasting of szaibelyite was faster than that of lizardite. Moreover, the melting of sodium carbonate accelerated the reaction between lizardite with sodium carbonate.Minerals 2019, 9, 533 2 of 11 reduction followed by alkali leaching in order to recover iron and boron stepwise [9,11], and molten sodium hydroxide leaching to utilize boron individually [16][17][18].During soda-ash roasting of ludwigite ore, sodium carbonate would react with both szaibelyite and lizardite, hindering the selective activation of boron. Hence, the dosage of sodium carbonate and the roasting conditions were closely relevant to the soda-ash roasting of ludwigite ore in the roasting process.…”

mentioning

confidence: 99%

“…Minerals 2019, 9, 533 2 of 11 reduction followed by alkali leaching in order to recover iron and boron stepwise [9,11], and molten sodium hydroxide leaching to utilize boron individually [16][17][18].…”

mentioning

confidence: 99%

Extraction of Boron from Ludwigite Ore: Mechanism of Soda-Ash Roasting of Lizardite and Szaibelyite

Zhang

You

et al. 2019

Minerals

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Ludwigite ore is a typical low-grade boron ore accounting for 58.5% boron resource of China, which is mainly composed of magnetite, lizardite and szaibelyite. During soda-ash roasting of ludwigite ore, the presence of lizardite hinders the selective activation of boron. In this work, lizardite and szaibelyite were prepared and their soda-ash roasting behaviors were investigated using thermogravimetric-differential scanning calorimetry (TG-DSC), X-ray diffraction (XRD), and scanning electron microscope and energy dispersive spectrometer (SEM-EDS) analyses, in order to shed light on the soda-ash activation of boron within ludwigite ore. Thermodynamics of Na 2 CO 3 -MgSiO 3 -Mg 2 SiO 4 -Mg 2 B 2 O 5 via FactSage show that the formation of Na 2 MgSiO 4 was preferential for the reaction between Na 2 CO 3 and MgSiO 3 /Mg 2 SiO 4 . While, regarding the reaction between Na 2 CO 3 and Mg 2 B 2 O 5 , the formation of NaBO 2 was foremost. Raising temperature was beneficial for the soda-ash roasting of lizardite and szaibelyite. At a temperature lower than the melting of sodium carbonate (851 • C), the soda-ash roasting of szaibelyite was faster than that of lizardite. Moreover, the melting of sodium carbonate accelerated the reaction between lizardite with sodium carbonate.Minerals 2019, 9, 533 2 of 11 reduction followed by alkali leaching in order to recover iron and boron stepwise [9,11], and molten sodium hydroxide leaching to utilize boron individually [16][17][18].During soda-ash roasting of ludwigite ore, sodium carbonate would react with both szaibelyite and lizardite, hindering the selective activation of boron. Hence, the dosage of sodium carbonate and the roasting conditions were closely relevant to the soda-ash roasting of ludwigite ore in the roasting process. In this work, lizardite and szaibelyite were prepared, and their behaviors of soda-ash roasting were investigated, in order to shed light on the soda-ash activation of boron within ludwigite ore. Materials and Methods MaterialsLizardite and szaibelyite were prepared from natural ores. The as-prepared samples were dried, crushed, ground and screened to 80% passing through 0.074 mm. Chemical composition and XRD patterns of these two samples are given in Table 1 and Figure 1, respectively. The corresponding purities of lizardite (calculated by SiO 2 content in the form of Mg 3 Si 2 O 5 (OH) 4 ) and szaibelyite (calculated by B 2 O 3 content in the form of Mg 2 B 2 O 5 ·H 2 O) are 86.3% and 94.6%, respectively.

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Highly efficient removal of organic pollutants via a green catalytic oxidation system based on sodium metaborate and peroxymonosulfate

et al. 2020

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Nucleation and morphology of sodium metaborate dihydrate from NaOH solution

Cited by 10 publications

References 28 publications

Effects of sodium roasting on the leaching rate of boron-bearing tailings and its mechanism analysis

Effects of sodium roasting on the leaching rate of boron-bearing tailings and its mechanism analysis

Extraction of Boron from Ludwigite Ore: Mechanism of Soda-Ash Roasting of Lizardite and Szaibelyite

Highly efficient removal of organic pollutants via a green catalytic oxidation system based on sodium metaborate and peroxymonosulfate

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