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| Study on Preparation of Composite Cementitious Material with Tailings |
| Received:January 16, 2019 Revised:March 12, 2019 |
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| DOI： |
| KeyWord:iron tailings; copper slag; comprehensive utilization; gel materials; preparation |
| Author | Institution |
| YAN Quanxiang |
College of Zijin Mining,Fuzhou University,Fuzhou Fujian China |
| KU Jiangang |
College of Zijin Mining,Fuzhou University,Fuzhou Fujian China |
| JIANG Fengming |
College of Zijin Mining,Fuzhou University,Fuzhou Fujian China |
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| Abstract: |
| In this paper, tailings slag composite cementing material was prepared by iron tailings and copper slag. By analyzing the ball milling time, sand ratio, concentration of slurry, slag content, exciting agent, water reducing agent, cement clinker, curing conditions and gelling material mechanical properties, the relationship between hydration mechanism of slag cementitious system, slag cementitious materials preparation technology conditions were determined. When the ratio of slag cementitious system was copper slag:limestone:gypsum:naphthalene water reducing agent = 79.8% : 4.2% : 16% : 0.5%, slag cementitious system ball grinding time of 25 min, filling in the slag cementitious system: cement clinker:sodium hydroxide:iron tailings = 20% : 5% : 0.5% : 74.5%. Slurry concentration was 75% for the best proportion of packing material in this condition. 5% cement block 28d compressive strength is 3.62 MPa. When the total amount of cement filling is 8%, the test block 28d compressive strength reaches 6.57mpa. It is suitable for the demand of the mine filling cementing material. |
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