A process for beneficiation of low-grade manganese ore and synchronous preparation of calcium sulfate whiskers during hydrochloric acid regeneration

: Manganese ore is an important metallurgical raw material that holds an important strategic position in the national economy of China. However, the grade of manganese ore in the country is mostly low, and the utilization efficiency of lowgrade manganese ore resources is low, which seriously restrict the healthy and stable development of China’s metallurgical industry. As a new green heating method, microwave is expected to address the problems of conventional methods and realize the effective utilization of low-grade manganese ore. In this paper, the research status of the microwave composite reduction of pyrolusite in recent years is reviewed. Microwave plays an important role in metallurgy, and it is the current direction pursued to improve the research intensity of microwave heating and extend it to actual industrial processes.

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Structural characteristic and formation mechanism of hemihydrate calcium sulfate whiskers prepared using FGD gypsum

Particuology ◽

10.1016/j.partic.2021.04.010 ◽

2021 ◽

Author(s):

Xiaoting Zhang ◽

Lingwei Ran ◽

Xiao Wang ◽

Biao Jin ◽

Jianwu Zhang ◽

...

Keyword(s):

Structural Characteristic ◽

Formation Mechanism ◽

Calcium Sulfate ◽

Fgd Gypsum ◽

Calcium Sulfate Whiskers

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Efficient activation of persulfate by calcium sulfate whisker supported nanoscale zero-valent iron for methyl orange removal

RSC Advances ◽

10.1039/d0ra09241j ◽

2021 ◽

Vol 11 (1) ◽

pp. 452-461

Author(s):

Yi Han ◽

Xian Zhou ◽

Li Lei ◽

Huiqun Sun ◽

Zhiyuan Niu ◽

...

Keyword(s):

Composite Material ◽

Methyl Orange ◽

Calcium Sulfate ◽

Zero Valent Iron ◽

Nanoscale Zero Valent Iron ◽

Calcium Sulfate Whiskers ◽

Calcium Sulfate Whisker

In order to improve the utilization of nanoscale zero-valent iron (nZVI) in activating persulfate (PS), a composite material of nZVI/CSW with nZVI supported on calcium sulfate whiskers (CSWs) was synthesized in this study.

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Sustainable Utilization of GCP Sludge as a Reductant in the Reduction Roasting of Low-Grade Manganese Ore to Recover Mn and Fe Values

Mining Metallurgy & Exploration ◽

10.1007/s42461-021-00380-4 ◽

2021 ◽

Author(s):

Malaya Kumar Jena ◽

Subhabrata Mishra ◽

Shaswat Kumar Das ◽

Syed Mohammed Mustakim ◽

Adeyemi Adesina

Keyword(s):

Low Grade ◽

Manganese Ore ◽

Sustainable Utilization ◽

Reduction Roasting

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Study of Calcium Sulfate Whiskers

Asian Journal of Chemistry ◽

10.14233/ajchem.2014.15192 ◽

2014 ◽

Vol 26 (1) ◽

pp. 17-20

Author(s):

Xue-Hong Zhang ◽

Lei Wang

Keyword(s):

Calcium Sulfate ◽

Calcium Sulfate Whiskers

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Effect of Sodium Citrate on the Hydration Capacity of Hemihydrate Calcium Sulfate Whiskers

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.584-586.1618 ◽

2014 ◽

Vol 584-586 ◽

pp. 1618-1621

Author(s):

Yu Bin Wang ◽

Le Yu ◽

Hua Wang ◽

Ting Shu He

Keyword(s):

Calcium Sulfate ◽

Sodium Citrate ◽

Adsorption State ◽

Calcium Sulfate Whiskers ◽

Hydration Capacity

The influence of sodium citrate on the hydration capacity of hemihydrate calcium sulfate whiskers was investigated. The products were characterized by FTIR, SEM and XRD.The results show that the absorption of the sodium citrate on the surface of the hemihydrate calcium sulfate whiskers is not uniform, and the adsorption state also changed with the amount of sodium citrate. Sodium citrate plays role on the hydration capacity of hemihydrate calcium sulfate whiskers.

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