采用机械活化的方法对某金矿尾矿用作水泥混合材进行了试验研究。其研究结果表明：比表面积在一定的范围内，尾矿的活性指数随着尾矿比表面积的增大而提高；当尾矿粉磨至比表面积为400 m2／kg时尾矿的活性指数已达到65％，当尾矿粉磨至比表面积为500 m2／kg后尾矿的活性指数几乎不再发生变化。通过火山灰性试验发现，该金矿尾矿的火山灰性不合格，因此不属于火山灰质混合材；利用电子探针对尾矿水泥净浆微观形貌分析发现，尾矿参与了部分水化反应；通过进一步研究发现，尾矿掺量在20％以内其强度满足42．5R等级水泥强度要求，掺量在30％以内其强度满足32．5 R等级水泥要求，其安定性、凝结时间等均符合普通硅酸盐水泥的要求。
The experiment study on gold tailings used as cement admixture is conducted by mechanical activation method.The result shows that activity index of the tailings increased with the specific surface area within a certain range.When the specific surface area reached about 400 m2/kg,the activity index reached 65 %,and changed little after 500 m2/kg.The test of pozzolanicity has been identified unacceptable,the pozzolanic feature of the tailings is un-qualified so that they can't be used as pozzolanic materials.By the EDS,it is seen in the microscale analysis that the gold tailings partly participate in the hydration reaction.Furthermore,when the tailings were added less than 20 %,ce-ment of 42.5R grade would be prepared.While the addition is less than 30%,cement of 32.5R grade would be gen-erated,of which the stability,coagulation time met ordinary Portland cement standards.
参考文献
| [1] | 蒋有义,杨永革,王忠红,李维兵.鞍山地区铁矿石工艺矿物学研究[J].金属矿山,2005(z2):202-207,218. |
| [2] | 邵广全.焦家金矿选矿厂尾矿综合利用选矿工艺研究[J].国外金属矿选矿,2006(07):41-43. |
| [3] | 吕宪俊,范海宝,邱俊,张言贵,曹旭.胶东蚀变岩型金矿石工艺矿物学性质研究[J].岩矿测试,2012(01):184-188. |
| [4] | Zivko Sekulic,Milan Petrov,Deana Zivanovic .Mechanical activation of various cements[J].International Journal of Mineral Processing,2004,74 |
| [5] | 史永林,仪桂兰.物理活化方法对钢渣、矿渣及粉煤灰活性的影响[J].中国资源综合利用,2011(10):17-20. |
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