Abstract:

During the mining, beneficiation, and smelting processes of manganese iron ore, mining waste, beneficiation tailings, smelting slag, residual heat and gas collected in closed furnaces, as well as waste disposal are a bottleneck for the high-quality development of enterprises. To overcome this challenge and a- chieve the resource recycling of waste within the factory area, as well as zero waste discharge in integrated mining, beneficiation, and metallurgy enterprises, this study focuses on optimizing the process of preparing admixtures from manganese iron ore waste. Based on existing small-scale experimental data and feedback from engineering applications, an orthogonal experimental design was used to study the blending ratio of waste materials. Range analysis and variance analysis were applied to optimize the material balance ratio for waste recycling, and engineering application verification was performed for the optimal ratio. The research results show that: 1) Under the conditions of mining waste accounting for 65% , beneficiation tailings for 20% , smelting slag for 16% , and activator for 1. 5% , the prepared admixture meets the national standard technical requirements, and the waste generated at each stage is effectively balanced in terms of disposal.

2) Considering the limitation of the logistics radius for admixtures, the study further explores the compati- bility of primary concrete raw materials and the admixtures within the logistics radius around the enterprise. The results demonstrate that the admixtures prepared in this study exhibit good compatibility with various types of cement and admixtures. 3) The integrated mining, beneficiation, and smelting manganese ore en- terprises can achieve balanced waste disposal, enhance the overall competitiveness of the enterprise, and a- chieve zero waste discharge by applying the results of this study.

Key words: non-metallic materials, comprehensive resource utilization, admixture, orthogonal experi- mental design