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The harmless treatment of waste selective catalytic reduction catalyst has become a thorny problem. In this investigation, a new method of harmless disposal of waste catalyst by utilizing iron ore sintering process is proposed, and the effect of granulating characteristics is studied. Results show that better bed permeability, shorter sintering time, and faster flame front speed could be characterized by applying higher granulating moisture. Sinter mineral and microstructure research found that wider distribution of skeleton‐crystal hematite while less calcium ferrite could be observed at higher granulating moisture. The porosity of sinter increases from 30.82% for granulating moisture 6.0% to 36.54% for granulating moisture 7.5% while the circle factor of pores decreases. Sinter index research results indicate that both tumbler index and yield have a descended trend whereas flame front speed increases with higher granulating moisture added. Productivity first increases then drops with increasing granulating moisture. Finally, a comprehensive index is used to evaluate the influence of granulating characteristics on sintering process, which first increases from 100 to 121 as granulating moisture increases from 6% to 6.5% then drops to 70.8 when granulating moisture further increases to 7.5%. The granulating moisture of 6.5% is recommended in present study.

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With the improvement of living standards and the development of the Internet, while food safety is being paid attention to, big data analysis of customer demand is becoming more and more important. In the past research on dairy traceability systems based on blockchain, people pay more attention to the role of "security traceability". On the basis of the original, this paper implements the traceability system with two functions of "security traceability + precision marketing" in the Hyperleger Fabric platform. On the basis of solving the problem of "security traceability" for consumers, this paper adds the function of big data analysis and precision marketing for sellers. It is hoped to further promote the application of blockchain in daily life.

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