苍山铁矿尾矿砂制备蒸压加气混凝土砌块的研究

发布时间：2018-04-14 19:01

本文选题：苍山铁矿 + 尾矿砂　；参考：《西安建筑科技大学》2017年硕士论文

【摘要】：中钢集团山东矿业有限公司苍山铁矿矿石储量大,属于鞍式贫铁矿,选矿工艺过程中尾矿砂产量大,粒度细,硅含量高,回收难度大,回收费用高,选矿后产生的尾矿砂,一部分用于矿山井下采空区的充填,其余一部分排放到地表临时废旧尾矿坑堆存,坑满后再进行覆土,但尾矿坑从征地,排放尾砂,再到后期的坑满覆土,以及排放过程中的工程费、管理费用非常的高,为了解决铁尾矿砂排放问题,更好建设和谐绿色矿山,通过对苍山铁矿尾矿砂综合利用分析,提出利用苍山铁矿尾矿砂制备蒸压加气混凝土砌块的项目研究,解决铁尾矿砂的排放问题,节约建尾砂库及回填覆土的相关工程费用,不仅能够改善矿区周边生态环境,而且能使铁尾矿砂资源得到充分的合理利用。近些年来,我国建筑行业水平的大大提高,环保、绿色的程度成为建筑业发展水平的重要标志,环保、绿色工程的实施已蔚然成风。非承重墙体的主要原材料也已经由粘土砖和混凝土砌块变成了蒸压加气混凝土砌块。蒸压加气混凝土砌块作为实现节约能源、节约土地、有效利用废弃材料的新型墙体材料,使环境、资源及经济协调统筹发展的同时,加速我们国家建筑行业的现代化,逐渐向产业化发展本文分析研究了中钢集团山东矿业有限公司苍山铁矿尾矿砂综合利用,通过实验进行制备蒸压加气混凝土砌块的研究,结果表明铁尾矿砂制备蒸压加气混凝土砌块能够满足国家相关标准及规范的要求,最后研究了利用铁尾矿砂制备蒸压加气混凝土砌块的可行性,通过研究主要得出如下结论:1)、分析当前尾矿砂露天堆放对环境造成的严重危害,以及尾矿处理给矿山企业增加的成本,提出通过尾矿砂制备蒸压加气混凝土砌块的必要性。2)、通过试验数据分析得出,苍山铁矿铁尾矿砂制备蒸压加气混凝土砌块石膏最佳掺量为3%,制品符合国家标准及规范要求。3)、通过试验数据分析得出,苍山铁矿铁尾矿砂能够制备蒸压加气混凝土砌块,并符合国家标准及规范要求,最佳配比为,铁尾矿:石灰:石膏:水泥=70:17:3:10。4)、分析制备蒸压加气混凝土砌块项目的发展规划、产业政策及行业准入,铁尾矿制备蒸压加气混凝土砌块项目符合国家及山东省的中长期发展规划,也符合国家对建筑废弃物的综合利用的相关规定,是国家大力扶持并鼓励发展的项目。5)、分析制备蒸压加气混凝土砌块项目的市场需求,蒸压加气混凝土砌块是国家重点发展的符合节能建筑的墙体材料,具有节能环保的功效,将成为今后墙体材料的首选。6)、对年产30万m3蒸压加气混凝土砌块项目进行经济效果评价,项目总投资约为1940万元,年消耗尾矿砂129896.9吨,年利润1256.37万元,投资收益率64.48%,投资回收期1.5年,综上所述,年产30万m3蒸压加气混凝土砌块的生产线可行。
[Abstract]:The Cangshan iron ore of Shandong Mining Co., Ltd of China Iron and Steel Group has large reserves and belongs to the saddle type poor iron ore. In the process of dressing, the tailings are produced with large output, fine grain size, high silicon content, great difficulty in recovery, high recovery cost, and tailings produced after dressing.One part is used for filling the underground goaf, the other part is discharged to the surface of the ground for temporary waste tailings, and then covered with earth after the pit is full, but the tailings are filled with earth from the expropriation of land, the discharge of tailings, and the late stage of the pit.In order to solve the problem of iron tailings discharge and build a harmonious green mine, the comprehensive utilization of Cangshan iron ore tailings is analyzed.The project study of autoclaved aerated concrete block made from Cangshan Iron Mine tailings is put forward to solve the discharge problem of iron tailings and save the engineering cost of building tailings reservoir and backfill soil, which can not only improve the surrounding ecological environment of mining area.Moreover, it can make full and reasonable use of iron tailings.In recent years, the level of construction industry in China has been greatly improved, environmental protection, green degree has become an important symbol of the level of development of the construction industry, the implementation of environmental protection, green engineering has become a trend.The main raw materials of non-loadbearing wall have changed from clay brick and concrete block to autoclaved aerated concrete block.Autoclaved aerated concrete block is a new type of wall material which can save energy, save land and make effective use of waste materials, so that the environment, resources and economy can develop as a whole, and at the same time, the modernization of our country's construction industry can be accelerated.In this paper, the comprehensive utilization of Cangshan iron ore tailings in Shandong Mining Co., Ltd. Of China Iron and Steel Co., Ltd is analyzed and studied, and the preparation of autoclaved aerated concrete block is studied through experiments.The results show that autoclaved aerated concrete block prepared by iron tailings can meet the requirements of relevant national standards and codes. Finally, the feasibility of preparing autoclaved aerated concrete block with iron tailings is studied.Through the research, we draw the following conclusions: 1: 1, analyzing the serious harm to the environment caused by the open pit stowage of tailings and the increased cost of tailings treatment to the mining enterprises.The necessity of preparing autoclaved aerated concrete block by tailings is put forward.The optimum amount of gypsum of autoclaved aerated concrete block in Cangshan Iron Mine is 3, and the products meet the requirements of national standards and specifications. Through the analysis of test data, it is concluded that Cangshan Iron tailings can prepare autoclaved aerated concrete blocks.The best proportion is: iron tailings: lime: gypsum: cement 70: 17: 3: 10.4, analysis of the development plan, industrial policy and industry access for the preparation of autoclaved aerated concrete blocks,The preparation of autoclaved aerated concrete blocks from iron tailings conforms to the long-term development plan of the state and Shandong Province, and also conforms to the relevant regulations of the state on the comprehensive utilization of construction waste.Is a national support and encourage development of the project. 5, analysis of the preparation of autoclaved aerated concrete block project market demand, autoclaved aerated concrete block is the key development of the state in line with energy conservation building wall materials, with the effect of energy conservation and environmental protection,It will be the first choice of wall material in the future. The economic effect of the project with annual output of 300000 m3 autoclaved aerated concrete block will be evaluated. The total investment of the project is about 19.4 million yuan, the annual consumption of tailings is 129896.9 tons, and the annual profit is 12.5637 million yuan.The investment yield is 64.48 and the investment recovery period is 1.5 years. In summary, the production line with 300000 m3 autoclaved aerated concrete block per year is feasible.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU522.32

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