Activity and Influence Factors of New Biomass Silicon Admixture

Abstract

Abstract: In order to solve the problem of resource disposal of abandoned crop highland barley straw, the abandoned highland barley straw is naturally burned outdoors and then calcined and ground again to prepare new biomass silicon admixture. The preparation conditions and design parameters of highland barley straw ash (HBSA) were preliminarily analyzed and verified by orthogonal test design. The response surface optimization analysis method was used to establish the response surface prediction model, and the preparation conditions of HBSA were further optimized and analyzed, so as to verify the rationality of orthogonal test results. In addition, based on grey entropy correlation analysis, the primary and secondary relationship of the influence factors of HBSA activity was determined. The microstructure of HBSA prepared under the optimum conditions was tested and analyzed by using a variety of microscopic testing techniques, and the reason why HBSA can be used as active admixture was revealed. The results show that the activity of HBSA is the highest when the second calcination temperature is 600 ℃, the calcination time is 2 h, and the grinding time is 2 h. The relative activity index of HBSA is 1.06. The response surface optimization method can be effectively used for the design of HBSA activity preparation parameters. The response surface prediction model has a high prediction accuracy, which better verifies the accuracy of orthogonal test results. The gray entropy correlation of calcination temperature is the largest, which should be the primary control factor in the preparation of HBSA. Because HBSA has finer particle size, larger specific surface area and higher active SiO₂ content, it effectively promotes the active effect of HBSA.

Key words: biomass silicon, admixture, active effect, orthogonal test, response surface optimization, grey entropy correlation analysis, microstructure

CLC Number:

TU526

CAO Feng, QIAO Hongxia, ZHANG Ying, LI Shuangying, ZHAO Ziyan. Activity and Influence Factors of New Biomass Silicon Admixture[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(6): 2140-2149.

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