Mechanism of Hydration Reaction of Cementitious Materials Prepared with Molybdenum Tailings and Waste Residue
-
摘要:
以钼尾矿为主要原料，辅以高炉渣、石膏等原料，制备多固废胶凝材料，研究了钼尾矿掺量、养护工艺对净浆试样力学性能的影响，并利用XRD、DTA-TG和SEM等方法对钼尾矿胶凝材料的水化反应机理开展了基础研究。结果表明，当m(钼尾矿)∶m(矿渣)∶m(熟料)∶m(石膏)为30∶50∶10∶10时，60 ℃养护试样的性能相对较好，28 d抗压强度可以达到48.4 MPa。钼尾矿废渣胶凝材料的水化产物主要是AFt和C-S-H凝胶，随着龄期的增加，其水化产物也逐渐增多。多种水化产物相互交织、穿插和填充，促进试样强度的不断增长。
Abstract:Waste cementitious material was prepared with molybdenum tailings, slag, clinker and gypsum as main raw materials. The influence of molybdenum tailings content and curing technology on the mechanical properties of the net pulp test block were studied. The hydration reaction mechanism of the cementitious material of molybdenum tailings was systematically studied with XRD, DTA-TG and SEM. The results showed that when m(molybdenum tailings)∶m(slag)∶m(clinker)∶m(gypsum) was 30∶50∶10∶10, the performance of the test block was relatively good at 60 ℃, and the compressive strength of 28 d could reach 48.4 MPa. The hydration products of the cementing material of molybdenum tailings and waste residues were mainly AFt and C-S-H gel. With the increased of curing age, the hydration products also increase gradually. There were variety of hydration products interweave, intersperse and fill, which promoted the strength of the test block to increase.
-
Key words:
- molybdenum tailings /
- cementitious materials /
- hydration products /
- hydration mechanism
-
-
表 1 试验原料的主要化学成分
Table 1. Main chemical composition of raw material
/% 原 料 Al2O3 TFe SiO2 MgO CaO TiO2 P2O5 Na2O K2O SO3 MnO Loss 钼尾矿 3.07 8.56 68.25 1.02 2.37 1.06 0.10 0.22 1.93 5.01 0.22 2.28 水泥熟料 3.56 3.47 20.37 0.83 66.28 0.78 -- -- 1.07 0.31 -- 0.90 高炉矿渣 14.62 0.70 33.57 9.89 36.30 0.90 -- 0.25 0.35 1.01 0.65 -- 脱硫石膏 1.07 0.57 3.20 7.36 36.52 -- 0.13 0.13 0.15 43.75 -- 6.82 
下载: 导出CSV
-
[1] 冯瑞. 钼矿资源现状及市场分析[J]. 世界有色金属, 2021, 579(15): 71−72. doi: 10.3969/j.issn.1002-5065.2021.15.036
FENG R. Present situation and market analysis of molybdenum resources[J]. World Nonferrous Metals, 2021, 579(15): 71−72. doi: 10.3969/j.issn.1002-5065.2021.15.036
[2] 于玲. 钼尾矿资源综合利用最新研究进展概述[J]. 冶金与材料, 2021, 41(5): 21−22. doi: 10.3969/j.issn.1674-5183.2021.05.009
YU L. Summary of recent research progress on comprehensive utilization of molybdenum tailings resources[J]. Metallurgy and Materials, 2021, 41(5): 21−22. doi: 10.3969/j.issn.1674-5183.2021.05.009
[3] 狄燕清, 崔孝炜. 掺尾矿高性能混凝土的制备[J]. 商洛学院学报, 2015, 29(6): 32−36. doi: 10.13440/j.slxy.1674-0033.2015.06.008
DI Y Q, CUI X W. Preparation of high performance concrete with iron ore tailings[J]. Journal of Shangluo University, 2015, 29(6): 32−36. doi: 10.13440/j.slxy.1674-0033.2015.06.008
[4] 狄燕清, 崔孝炜, 李春, 等. 掺钼尾矿发泡水泥保温材料的制备[J]. 新型建筑材料, 2016, 43(4): 10−13. doi: 10.3969/j.issn.1001-702X.2016.04.003
DI Y Q, CUI X W, LI C, et al. Study on preparation of porous insulation materials with molybdenum tailings[J]. New Building Materials, 2016, 43(4): 10−13. doi: 10.3969/j.issn.1001-702X.2016.04.003
[5] 狄燕清, 崔孝炜, 庞华, 等. 掺尾矿新型轻质建筑保温材料的制备[J]. 混凝土与水泥制品, 2016, 242(6): 66−69. doi: 10.3969/j.issn.1000-4637.2016.06.016
DI Y Q, CUI X W, PANG H, et al. Preparation of new lightweight building insulation material mixed with tailings[J]. China Concrete and Cement Products, 2016, 242(6): 66−69. doi: 10.3969/j.issn.1000-4637.2016.06.016
[6] 李峰, 崔孝炜, 胡哲哲, 等. 钼尾矿制备胶结充填材料的研究[J]. 非金属矿, 2021, 44(6): 49−52. doi: 10.3969/j.issn.1000-8098.2021.06.013
LI F, CUI X W, HU Z Z, et al. Research on preparation of cemented backfilling materials using molybdenum tailings[J]. Non-Metallic Mines, 2021, 44(6): 49−52. doi: 10.3969/j.issn.1000-8098.2021.06.013
[7] 李峰, 崔孝炜, 刘璇, 等. 低活性钼尾矿的活化工艺研究[J]. 非金属矿, 2021, 44(3): 72−75. doi: 10.3969/j.issn.1000-8098.2021.03.018
LI F, CUI X W, LIU X, et al. Research on activation process of low activity molybdenum tailings[J]. Non-Metallic Mines, 2021, 44(3): 72−75. doi: 10.3969/j.issn.1000-8098.2021.03.018
[8] 崔孝炜, 倪文, 吴辉. 不同养护条件对铁尾矿混凝土性能的影响[J]. 金属矿山, 2013, 439(1): 161−163. doi: 10.3969/j.issn.1001-1250.2013.01.045
CUI X W, NI W, WU H. Influence of different curing conditions on the property of concrete with ore tailings[J]. Metal Mine, 2013, 439(1): 161−163. doi: 10.3969/j.issn.1001-1250.2013.01.045
[9] 刘世昌. 极细颗粒钼尾矿制备高强混凝土的研究[D]. 邯郸: 河北工程大学, 2017.
LIU S C. Study on preparation of high strength concrete by ultrafine particle molybdenum tailings [D]. Handan: Hebei University of Engineering, 2017.
[10] 权宗刚, 冯晓兰, 陈媛媛. 利用钼尾矿制备活性粉末混凝土的研究[J]. 新型建筑材料, 2022, 49(3): 46−49. doi: 10.3969/j.issn.1001-702X.2022.03.011
QUAN Z G, FENG X L, CHEN Y Y. Study on the preparation of reactive powder concrete with molybdenum tailings[J]. New Building Materials, 2022, 49(3): 46−49. doi: 10.3969/j.issn.1001-702X.2022.03.011
[11] CUI X W, NI W. Hydration behavior of cementitious materials with all solid waste based of steel slag and blast furnace slag[J]. Revista de la Facultad de Ingeniería, 2016, 31(7): 172−181.
[12] CUI X W, NI W, REN C. Early hydration kinetics of cementitious materials containing different steel slag powder contents[J]. International Journal of Heat and Technology, 2016, 34(4): 590−596. doi: 10.18280/ijht.340406
[13] 李建涛, 崔杰, 王之宇. 利用商洛钼尾矿制备混凝土保温砌块的试验研究[J]. 新型建筑材料, 2015, 42(3): 80−83. doi: 10.3969/j.issn.1001-702X.2015.03.021
LI J T, CUI J, WANG Z Y. Experimental study on the preparation of heat-insulating concrete block using Shangluo molybdenum tailings[J]. New Building Materials, 2015, 42(3): 80−83. doi: 10.3969/j.issn.1001-702X.2015.03.021
[14] 常学勇, 张艳娇, 赵平, 等. 某含石膏硫化钼尾矿中氧化钼钨的混合浮选试验[J]. 金属矿山, 2015(3): 112−115.
CHANG X Y, ZHANG Y J, ZHAO P, et al. Bulk flotation for tungsten and molybdenum oxide from molybdenum sulfide tailing containing gypsum[J]. Metal Mine, 2015(3): 112−115.
[15] 崔孝炜, 狄燕清, 南宁, 等. 钼尾矿骨料混凝土的试验研究[J]. 混凝土与水泥制品, 2016, 244(8): 84−87. doi: 10.3969/j.issn.1000-4637.2016.08.021
CUI X W, DI Y Q, NAN N, et al. Study on concrete with molybdenum tailings as aggregate[J]. China Concrete and Cement Products, 2016, 244(8): 84−87. doi: 10.3969/j.issn.1000-4637.2016.08.021
[16] 刘璇, 李如燕, 崔孝炜, 等. 机械力活化对钼尾矿胶凝性能的影响研究[J]. 矿产保护与利用, 2018, 2016(4): 108−111+117.
LIU X, LI R Y, CUI X W, et al. The influence of mechanical activation on the cementing property of molybdenum tailings[J]. Conservation and Utilization of Mineral Resources, 2018, 2016(4): 108−111+117.
[17] 崔孝炜, 庞华, 狄燕清. 利用钼尾矿制备矿物掺合料的试验研究[J]. 矿产保护与利用, 2017, 208(2): 90−95. doi: 10.13779/j.cnki.issn1001-0076.2017.02.017
CUI X W, PANG H, DI Y Q. Study on the preparation of mineral admixtures with molybdenum tailings[J]. Conservation and Utilization of Mineral Resources, 2017, 208(2): 90−95. doi: 10.13779/j.cnki.issn1001-0076.2017.02.017
-
图(6)
表(1)
计量
- 文章访问数: 68
- PDF下载数: 11
- 施引文献: 0