工程科学学报，第40卷，第10期：1196-1207,2018年10月 Chinese Journal of Engineering,Vol.40,No.10:1196-1207,October 2018 DOI:10.13374/j.issn2095-9389.2018.10.006;http://journals.ustb.edu.cn 钼尾矿水泥免烧砖压制工艺及着色特性 代文彬2)，郑永超)，陈旭峰)，苍大强) 1)北京建筑材料科学研究总院有限公司，北京1000412)北京科技大学治金与生态工程学院，北京100083 区通信作者，E-mail:daiwenbin5210@163.com 摘要以承德钼尾矿和水泥构成的简单免烧砖体系，对其在成型工艺、微观结构和着色特性方面进行基础工艺研究.结果 显示，水泥-钼尾矿免烧压砖适宜的水泥/钼尾矿质量比为0.18~0.25，成型水/固体原料质量比为0.1，成型压强25MPa,保压 时间30s,在阶梯式成型施压方式下可改善砖块性能.经长期养护后，压砖中Ca(OH)2、钙矾石和CaC0,的相对含量会随水泥 掺量增加而逐渐升高，而云母含量则逐渐降低.当水泥量质量分数达25%时，会有低硫型水化硫铝酸钙相(AFm)形成.此外， 在试块中可见大量水化硅酸钙(C-S-H)凝胶、钙矾石和C(0H),矿相形成.掺加9%以内氧化铁型红、黄、绿颜料，对试块强 度无不利影响，而掺加蓝、黑颜料会使试块强度损失，在保证砖材强度前提下，添加量宜控制在6%-9%. 关键词免烧砖：钼尾矿压制工艺；着色：基础性能 分类号TD982 Pressing process and coloring property of baking-free bricks made of molybdenum tail- ing and cement DAI Wen-bin'2),ZHENG Yong-chao),CHEN Xu-feng,CANG Da-qiang?) 1)Beijing Building Materials Academy of Sciences Research,Beijing 100041,China 2)School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing.Beijing 100083.China Corresponding author,E-mail:daiwenbin5210@163.com ABSTRACT As a by-product of mining and the extensive production of industrial solid waste,tailing has many types,has a low uti- lization rate,and seriously affects the surrounding ecological environment.With the protection of natural resources and ecology in Chi- na,the traditional methods of obtaining clay and natural stone by mining cultivated land and preparing building materials by utilizing a high-temperature process will be avoided and eliminated gradually.In the face of the increasing demand for construction and decoration materials in the engineering construction sector in the Jing-Jin-Ji region,the use of tailing resources,which are stockpiled in large amounts in Chengde,Hebei Province,for the preparation of baking-free and decorative bricks is characterized by high usage of solid waste,low energy consumption,low environmental pollution,and considerable savings.In this study,for the simple system of molyb- denum tailing-cement brick,the press molding process,microstructure,and coloring property after the addition of pigment were investi- gated.Results show that,for the baking-free brick,the appropriate cement-to-tailing ratio is 0.18~0.25,water-to-solid raw materials ratio for pressing is 0.10,pressing strength is 25 MPa,pressing holding time is 30 s,and brick performance is improved by the step- style pressing mode.After curing for a long time,the relative contents of Ca(OH)2,ettringite,and CacO,increase with the increase in the content of cement in the brick samples,whereas the content of mica decreases.If the mass content of cement reaches 25%,then the AFm phase (low sulfur calcium aluminum sulfate)will form.Large quantities of hydrated calcium silicate(C-S-H)gel,ettring- ite,and Ca(OH),can also be observed in the brick samples.The addition of red,yellow,and green pigments of iron oxide type within 收稿日期：2017-10-31 基金项目：国家重点研发计划子课题资助项目(2017YFC0703206):固废资源化利用与节能建材国家重点实验室开放课题资助项目(SWR- 2016-003)工程科学学报,第 40 卷,第 10 期:1196鄄鄄1207,2018 年 10 月 Chinese Journal of Engineering, Vol. 40, No. 10: 1196鄄鄄1207, October 2018 DOI: 10. 13374 / j. issn2095鄄鄄9389. 2018. 10. 006; http: / / journals. ustb. edu. cn 钼尾矿水泥免烧砖压制工艺及着色特性 代文彬1,2) 苣 , 郑永超1) , 陈旭峰1) , 苍大强2) 1)北京建筑材料科学研究总院有限公司, 北京 100041 2) 北京科技大学冶金与生态工程学院, 北京 100083 苣通信作者, E鄄mail: daiwenbin5210@ 163. com 摘 要 以承德钼尾矿和水泥构成的简单免烧砖体系,对其在成型工艺、微观结构和着色特性方面进行基础工艺研究. 结果 显示,水泥鄄鄄钼尾矿免烧压砖适宜的水泥/ 钼尾矿质量比为 0郾 18 ~ 0郾 25,成型水/ 固体原料质量比为 0郾 1,成型压强 25 MPa,保压 时间30 s,在阶梯式成型施压方式下可改善砖块性能. 经长期养护后,压砖中 Ca(OH)2 、钙矾石和 CaCO3 的相对含量会随水泥 掺量增加而逐渐升高,而云母含量则逐渐降低. 当水泥量质量分数达 25% 时,会有低硫型水化硫铝酸钙相(AFm)形成. 此外, 在试块中可见大量水化硅酸钙(C鄄鄄 S鄄鄄H)凝胶、钙矾石和 Ca(OH)2 矿相形成. 掺加 9% 以内氧化铁型红、黄、绿颜料,对试块强 度无不利影响,而掺加蓝、黑颜料会使试块强度损失,在保证砖材强度前提下,添加量宜控制在 6% ~ 9% . 关键词 免烧砖; 钼尾矿; 压制工艺; 着色; 基础性能 分类号 TD982 收稿日期: 2017鄄鄄10鄄鄄31 基金项目: 国家重点研发计划子课题资助项目(2017YFC0703206);固废资源化利用与节能建材国家重点实验室开放课题资助项目( SWR鄄鄄 2016鄄鄄003) Pressing process and coloring property of baking鄄free bricks made of molybdenum tail鄄 ing and cement DAI Wen鄄bin 1,2) , ZHENG Yong鄄chao 1) , CHEN Xu鄄feng 1) , CANG Da鄄qiang 2) 1)Beijing Building Materials Academy of Sciences Research, Beijing 100041, China 2)School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China 苣 Corresponding author, E鄄mail: daiwenbin5210@ 163. com ABSTRACT As a by鄄product of mining and the extensive production of industrial solid waste, tailing has many types, has a low uti鄄 lization rate, and seriously affects the surrounding ecological environment. With the protection of natural resources and ecology in Chi鄄 na, the traditional methods of obtaining clay and natural stone by mining cultivated land and preparing building materials by utilizing a high鄄temperature process will be avoided and eliminated gradually. In the face of the increasing demand for construction and decoration materials in the engineering construction sector in the Jing鄄鄄Jin鄄鄄Ji region, the use of tailing resources, which are stockpiled in large amounts in Chengde, Hebei Province, for the preparation of baking鄄free and decorative bricks is characterized by high usage of solid waste, low energy consumption, low environmental pollution, and considerable savings. In this study, for the simple system of molyb鄄 denum tailing鄄cement brick, the press molding process, microstructure, and coloring property after the addition of pigment were investi鄄 gated. Results show that, for the baking鄄free brick, the appropriate cement鄄to鄄tailing ratio is 0郾 18 ~ 0郾 25, water鄄to鄄solid raw materials ratio for pressing is 0郾 10, pressing strength is 25 MPa, pressing holding time is 30 s, and brick performance is improved by the step鄄 style pressing mode. After curing for a long time, the relative contents of Ca(OH)2 , ettringite, and CaCO3 increase with the increase in the content of cement in the brick samples, whereas the content of mica decreases. If the mass content of cement reaches 25% , then the AFm phase (low sulfur calcium aluminum sulfate) will form. Large quantities of hydrated calcium silicate (C鄄鄄S鄄鄄H) gel, ettring鄄 ite, and Ca(OH)2 can also be observed in the brick samples. The addition of red, yellow, and green pigments of iron oxide type within