Experiment Study on Utilization in Additive of Cement of Panzhihua Ti-bearing Blast Furnace Slag Flotation Tailings
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摘要: 针对攀钢含钛高炉渣大量堆积、难以资源化利用的问题,以攀钢水淬含钛高炉渣为原料,通过高温改性—浮选分离工艺回收浮选精矿钛组分;对于浮选尾渣,分析其矿物组成、微观形貌、比表面积等特性,并进行不同条件下用作水泥掺合料的试验,测试水泥试块微观形貌及力学性能。试验结果表明:使用TiO2含量为8.7%的攀钢含钛高炉渣浮选尾渣,磨细至d90约20μm后,可作为水泥的惰性掺合料,当掺量为10%时,水泥砂浆的28 d抗压强度为50.2 MPa、活性指数为94.5%。Abstract: In order to utilize titanium-bearing blast furnace slag,taking Panzhihua Ti-bearing blast furnace slag as raw material and recovering the titanium component through high temperature modificationflotation separation process.For flotation tailings,the characteristics of the mineral composition,micro-morphology,and specific surface area were analyzed,and tests were performed on cement mixtures under different conditions. The microstructure observation and mechanical properties tests on the cement blocks were then carried out. The experimental results show that the flotation tailings of Panzhihua Ti-bearing blast furnace slag with TiO2 content of 8. 7% can be used as an additive into inert cement after being ground to d90 of ~20 μm. When the massive weight of slag is 10%,the compressive strength of cement mortar after 28-days hydration is 50.2 MPa,and its activity index is 94.5%.
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Key words:
- Ti-bearing blast furnace slag /
- flotation tailings /
- cement additive /
- morphology
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