水力旋流器在中关铁矿尾砂充填中的应用  

APPLICATION OF HYDROCYCLONE IN TAILINGS FILLING OF ZHONGGUAN IRON MINE

作　　者：刘聪 任建辉 辉景欣 张庆博 张义坤 博玉亮 Liu Cong;Ren Jianhui;Hui Jingxin;Zhang Qingbo;Zhang Yikun;Bo Yuliang(HBIS Group Shahe Zhongguan Iron Mine Co.,Ltd.,Xingtai 054100,Hebei;Hebei Province Low Carbon Intelligent and Efficient Mining Technology Innovation Center for Complex Iron Mines,Xingtai 054100,Hebei)

机构地区：[1]河钢集团沙河中关铁矿有限公司,河北邢台054100 [2]河北省复杂铁矿低碳智能高效开采技术创新中心,河北邢台054100

出　　处：《河北冶金》2024年第5期62-65,共4页Hebei Metallurgy

摘　　要：中关铁矿为地下矿山,采矿方法为阶段空场嗣后充填采矿法。原充填工艺采用全尾砂充填,由于尾砂中细粒级物料占比较大,影响充填体强度,为了提高充填体强度只能增加充填材料使用量,造成了充填作业的成本增加。为提高充填体强度,保证“二步采”采矿安全性,降低充填成本,中关铁矿充填车间在原工艺流程的基础上,通过在立式砂仓的进砂口处增加FX250-GX-B×6旋流器组对尾砂进行分级,提高进入充填砂仓物料的粒度,优化了充填工艺。调试结果表明,在旋流器给料压力为0.09 MPa时可以得到产率较高、粒度较粗的底流尾砂,在给料压力为0.09 MPa的情况下,通过改变充填料浆浓度(最佳为58%)、灰砂比(最佳为1∶4)、充填材料配比(最佳为矿渣微粉:激发粉=55∶45)3个工艺指标,可以提高充填体强度。该设备的成功应用提供了一种通过对尾砂分级、提高底流粒度来提高充填体强度、降低充填材料消耗的可行性办法,在矿山生产中具有推广意义。Zhongguan Iron Mine is an underground mine,and the mining method is stage open pit followed by filling mining.The original filling process used full tailings filling,but due to the large proportion of fine-grained materials in the tailings,it affects the strength of the filling body.In order to improve the strength of the filling body,the amount of filling material used can only be increased,resulting in an increase in the cost of filling operations.In order to improve the strength of the filling body,ensure the safety of"two-step mining",and reduce the filling cost,the filling workshop of Zhongguan Iron Mine added an FX250-GX-B×6 cyclone group at the sand inlet of the vertical sand bin on the basis of the original process flow to classify the tailings,improve the particle size of the materials entering the filling sand bin,and optimize the filling process.The debugging results show that high yield and coarse particle size bottom flow tailings can be obtained when the feeding pressure of the cyclone is 0.09 MPa.Under the feeding pressure of 0.09 MPa,the strength of the filling body can be improved by changing three process indicators:filling slurry concentration(optimal 58%),ash sand ratio(optimal 1∶4),and filling material ratio(optimal slag micro powder:excitation powder=55∶45).The successful application of this equipment provides a feasible method to improve the strength of the filling body and reduce the consumption of filling materials by classifying tailings and increasing the bottom flow particle size,which has promotional significance in mining production.

关 键 词：水力旋流器 充填体强度 料浆浓度 灰砂比 矿渣微粉和激发粉配比 

分 类 号：TD853.34[矿业工程—金属矿开采]