Experimental Study on Iron Removal Purification of Potassium Bearing Sand Shale and Its Application of Ceramics

Abstract

Abstract: Based on the analysis of the occurrence state of iron in potassium bearing rock, the experiment of iron removal purification of potassium bearing sand shale was carried out, and the application of iron removal powder in ceramic raw materials was studied. The results show that, under the optimum conditions that the grinding fineness (-74 μm) is 50% (mass fraction), the magnetic field strength is 190 mT, the hydrochloric acid concentration is 20% (mass fraction), the leaching temperature is 90 ℃, the total iron content in iron removal powder can be reduced to 0.13% (mass fraction), and the total content of K₂O and Na₂O increases to 11.00% (mass fraction) which meets the requirements of grade I potassium feldspar for ceramics. The iron removal powder is easy to be formed in the forming test of ceramic embryo, with wide firing temperature range and high yield, It can be used as ceramic raw material instead of feldspar. A new direction of using potassium bearing sand shale as raw materials of ceramics has been developed.

Key words: potassium bearing sand shale, iron removal, occurrence state ceramic raw material, ceramic property

CLC Number:

TQ174
TD985

HE Ruiming, ZHAO Yulian, WANG Yong, SHI Wei, LI Cheng, LI Aimin. Experimental Study on Iron Removal Purification of Potassium Bearing Sand Shale and Its Application of Ceramics[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(5): 1672-1678.

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