摘要
为研究金矿尾矿制备硅酸盐水泥的可行性,以蚀变岩型金矿尾矿为原料,制备了4种硅酸盐水泥,分别从煅烧温度、熟料物相、物理性能、水化产物等方面进行了考察。结果表明:金矿尾矿用于硅酸盐水泥制备的最佳煅烧温度为1450℃;4种水泥熟料的物相均为C 3S、C 2S、C 3A和C 4AF,水化产物均为水化硅酸钙凝胶、钙矾石和氢氧化钙;抗折强度和抗压强度随金矿尾矿用量的增加先增加后降低,且当金矿尾矿、石灰石、黏土、铁质矫正剂的质量比为6.00∶86.11∶4.60∶3.29时,水泥的抗折强度和抗压强度最大,满足强度等级52.5硅酸盐水泥的标准。该研究为金矿尾矿的资源化利用拓宽了途径,为传统硅质水泥原料提供了补充。
To study the feasibility to use gold ore tailings for the preparation of Portland cement,4 Portland cements were prepared with altered rock gold ore tailings as raw material.The calcination temperature,clinker phases,physical properties and hydration products of the Portland cements were investigated respectively.The results show that the optimum calcination temperature of Portland cements preparation is 1450℃;the phases of 4 cement clinker materials are C 3S,C 2S,C 3A and C 4AF,and the hydration products are all calcium silicate hydrate gels,ettringite and calcium hydroxide;the flexural and compressive strengths of the Portland cements increased first and then decreased with the increase of the gold ore tailings addition,and when the mass ratio of the gold ore tailings,limestone,clay,iron corrective agent is 6.00∶86.11∶4.60∶3.29,the flexural and compressive strengths of cement are the highest,meeting the standard of 52.5 grade Portland cement.This study broadens the approach for the resource utilization of gold ore tailings and provides a supplement for the traditional siliceous cement raw materials.
作者
王强
赵景刚
王来军
吕宪俊
Wang Qiang;Zhao Jinggang;Wang Laijun;LüXianjun(College of Chemical and Biological Engineering,Shandong University of Science and Technology;Shandong Hexi Gold Group Co.,Ltd.)
出处
《黄金》
CAS
2021年第2期81-86,共6页
Gold
基金
国家自然科学基金项目(51674161)
山东省自然科学基金重大基础研究项目(ZR2017ZC0735)。
关键词
金矿尾矿
硅酸盐水泥
物理性能
水化产物
水泥熟料
gold ore tailings
Portland cement
physical properties
hydration products
cement clinker
