Affiliation:
1. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology , Kunming 650093 , China
2. State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization , Kunming 650093 , China
Abstract
Abstract
Himalayan rock salt contains a variety of minerals and trace elements, which is conducive to human health. The solutions of black rock salt and rose salt are alkaline, and the content of water insoluble matter is 0.34 and 0.083%, respectively. The element composition of water insoluble matter in rock salt is determined and analyzed. It is found that the main component of two kinds of rock salt water insoluble matter is soil. Due to the presence of water insoluble matter in rock salt, according to the different specific gravity of molten sodium chloride and insoluble matter, rock salt was purified by high-temperature melting method. Rose salt is mainly studied during purification. The results showed that the content of insoluble matter in rose salt decreased from 0.083 to 0.0024% after holding at 950°C for 40 min; the contents of arsenic, barium, and lead decreased to 0.0032, 0.61, and 0.21 mg·kg−1, respectively; the content of sodium increased to 39.24%, the contents of calcium, magnesium, and iron reached to 2,200, 855, and 1.31 mg·kg−1, respectively.
Subject
Physical and Theoretical Chemistry,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Reference18 articles.
1. Aquilano, D., F. Otálora, L. Pastero, and JM. García-Ruiz. Three study cases of growth morphology in minerals: halite, calcite and gypsum. Progress in Crystal Growth and Characterization of Materials, Vol. 62, No. 2, 2016, pp. 227–251.
2. Lee, Y., S. H. Nam, K. S. Ham, J. Gonzalez, D. Oropeza, D. Quarles, et al. Multivariate classification of edible salts: simultaneous laser-induced break-down spectroscopy and laser-ablation inductively coupled plasma mass spectrometry analysis. Spectrochimica Acta Part B: Atomic Spectroscopy, Vol. 118, 2016, pp. 102–111.
3. Titler, R. V. and P. Curry. Chemical analysis of major constituents and trace contaminants of rock salt. Pensylvania Department of Environmental Protection, Bureau of Water Standards and Facility Regulation, 2011, Report, 052711.
4. Yalçin, Ş. and İ. H. Mutlu. Structural characterization of some table salt samples by XRD, ICP, FTIR and XRF techniques. Acta Physica Polonica A, Vol. 121, No. 1, 2012, pp. 50–52.
5. Binega, Y. Chemical analysis of the Assale (Ethiopia) rock salt deposit. Bulletin of the Chemical Society of Ethiopia, Vol. 20, No. 2, 2008, pp. 319–324.