Leaching Properties of Feldspar Associated with a Granite-pegmatite Type Quartz Mine

LIU Hongzhao; LIU Lin; WANG Wei; CAO Yaohua; WANG Hongliang; CAO Fei

doi:10.13779/j.cnki.issn1001−0076.2022.05.006

2022 Vol. 42, No. 5

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Article navigation > Conservation and Utilization of Mineral Resources > 2022 > 42(5): 35-42

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LIU Hongzhao, LIU Lin, WANG Wei, CAO Yaohua, WANG Hongliang, CAO Fei. Leaching Properties of Feldspar Associated with a Granite-pegmatite Type Quartz Mine[J]. Conservation and Utilization of Mineral Resources, 2022, 42(5): 35-42. doi: 10.13779/j.cnki.issn1001−0076.2022.05.006

Citation:

LIU Hongzhao, LIU Lin, WANG Wei, CAO Yaohua, WANG Hongliang, CAO Fei. Leaching Properties of Feldspar Associated with a Granite-pegmatite Type Quartz Mine[J]. Conservation and Utilization of Mineral Resources, 2022, 42(5): 35-42. doi: 10.13779/j.cnki.issn1001−0076.2022.05.006

Leaching Properties of Feldspar Associated with a Granite-pegmatite Type Quartz Mine

1.
Zhengzhou Institute of Multipurpose Utilization of Mineral Resources, CAGS, Zhengzhou 450006, China
2.
China National Engineering Research Center for Utilization of Industrial Minerals, Zhengzhou 450006, China
3.
Engineering Technology Innovation Center for Development and Utilization of High Purity Quartz, Ministry of Natural Resources, Zhengzhou 450006, China
4.
Key Laboratory of Comprehensive Utilization of Gold Resource in Henan Province, Zhengzhou 450006, China
5.
Key Laboratory for Polymetallic Ores' Evaluation and Utilization, MNR, Zhengzhou 450006, China

Received Date: 28 September 2022

Publish Date: 25 October 2022

Abstract

Abstract

The feldspar was one of the major impurity mineral in purification process of high purity quartz. In this article the feldspar which was separated and enriched from a granitic pegmatite quartz ore was selected as research object. A serial of comparative studies on leaching effect of the feldspar or roasting product with different treatment process including conventional roasting, chloridizing roasting, one-step leaching and three-stage leaching were conducted. Finally, the roasted product and leaching residue were characterized by XRD and SEM for finding out the mineral transformation characteristics of the feldspar in different treatment process. Leaching results showed that the maximum weight loss rate of 70.27% which means the optimal leaching effect was obtained, when the process that the feldspar roasted in chlorine gas atmosphere at 1130 ℃ followed by three-stage leaching by 15 g/L HCl+5 g/L HF mixed acid solution was adopted. Results of XRD and SEM analysis showed that the K element in feldspar would partly be gasified and removed by chloridizing roasting. When the high concentrated mixed acid was adopted, the mineral structure of feldspar was easier to be destroyed and the higher leaching rate of Al was obtained, but the leaching rate and removal effect of K was limited by cubic silosilicite phase which was formed newly by K⁺ and [SiF₆]^2- in the leaching process.
- feldspar /
- high purity quartz /
- roasting /
- water quenching treatment /
- chloridizing roasting /
- purification.

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References

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