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超细含金矿泥可选性探索研究
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作者 王治方 《矿业工程》 CAS 2022年第4期31-33,共3页
某金矿随着采掘作业面的不断深入以及“多碎少磨”相关工作的开展,原生、次生矿泥的性质均发生很大变化,选矿难度极大。为深入剖析限制回收率进一步提高的原因,探求降低尾矿品位的途径,开展了超细含金矿泥工艺矿物学及可选性探索研究。... 某金矿随着采掘作业面的不断深入以及“多碎少磨”相关工作的开展,原生、次生矿泥的性质均发生很大变化,选矿难度极大。为深入剖析限制回收率进一步提高的原因,探求降低尾矿品位的途径,开展了超细含金矿泥工艺矿物学及可选性探索研究。经研究,确定最优浮选条件为矿浆浓度10%,加入硅酸钠500 g/t,捕收剂为捕金灵+vd653用量90 g/t,起泡剂11#油40 g/t,浮选机设备转速设为2500 r/min,尾矿品位由0.35 g/t降低至0.33 g/t,回收率由65%提高至67.13%。 展开更多
关键词 矿泥性质 工艺矿物学 强化分散 加强搅拌 回收率
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Effect of substrate amendment on alkaline minerals and aggregate stability in bauxite residue 被引量:12
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作者 TIAN Tao KE Wen-shun +4 位作者 ZHU Feng WANG Qiong-li YE Yu-zhen GUO Ying XUE Sheng-guo 《Journal of Central South University》 SCIE EI CAS CSCD 2019年第2期393-403,共11页
Bauxite residue is an alkaline waste material in the process of alumina production due to its characteristics of higher salinity and alkalinity,which results in environmental issues and extremely restricts the sustain... Bauxite residue is an alkaline waste material in the process of alumina production due to its characteristics of higher salinity and alkalinity,which results in environmental issues and extremely restricts the sustainable development of alumina industries.In this work,we conduct a column experiment to study the effects of two amendments on aggregate stability and variations in alkaline minerals of bauxite residue.The two amendments are phosphogypsum(PG)and phosphogypsum and vermicompost(PVC).The dominant fraction in aggregate is 1–0.25 mm in diameter on the surface,which takes up 39.34%,39.38%,and 44.51%for CK,PG,and PVC,respectively.Additions of PG and PVC decreased pH,EC,ESP,exchangeable Na^+concentration and the percentage of alkaline minerals,and then increased exchangeable Ca^2+concentration in bauxite residue.There was significant positive correlation between pH and exchangeable Na^+concentration,the percentage of cancrinite,tricalcium aluminate and calcite;while negative correlation was found in pH value versus exchangeable Ca^2+concentration.Theses findings confirmed that additions of phosphogypsum and vermicompost have a stimulative effect on aggregate stability in bauxite residue.In particular,amendment neutralization(phosphogypsum+vermicompost)in column represents an advantage for large-scale simulation of vegetation rehabilitate in bauxite residue disposal areas. 展开更多
关键词 bauxite residue substrate amendment alkaline minerals aggregate stability soil formation in bauxite residue
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Experimental Study on Mechanical Characteristics of Cracked Rock Mass Reinforced by Bolting and Grouting 被引量:2
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作者 HAN Li-jun HE Yong-nian 《Journal of China University of Mining and Technology》 EI 2005年第3期177-182,共6页
The stress hardening characteristics of the reinforced rock mass in uniaxial compression tests were revealed by means of the experimental study on mechanical characteristics of cracked rock mass reinforced by bolting ... The stress hardening characteristics of the reinforced rock mass in uniaxial compression tests were revealed by means of the experimental study on mechanical characteristics of cracked rock mass reinforced by bolting and grouting. And the load-beating mechanism of the reinforced rock mass was perfectly reflected by the experiment. The results can offer some useful advice for support design and stability analysis of deep drifts in unstable strata. 展开更多
关键词 stress hardening reinforcement by bolting and grouting displacement constraints cracked rock mass structural effect
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Experimemal study on improving the durability of concrete with Mineral Powder and Activator
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作者 BAI YuXiang ZHOU Yunlin 《International English Education Research》 2018年第1期10-12,共3页
An equivalent amount of metallurgical slag, water-quenched slag powder and activator was substituted for a part of cement to prepare concretes at strength grades ofC25, C30 and C40. Thanks to the filling effect, pozzo... An equivalent amount of metallurgical slag, water-quenched slag powder and activator was substituted for a part of cement to prepare concretes at strength grades ofC25, C30 and C40. Thanks to the filling effect, pozzolanic effect, raicro-aggregate effect, and improvement of pore structure, the prepared concretes not only had greater strength compared with reference concrete, but also had greater impermeability and frost-resistance. Moreover, the expansion reactions between alkali and aggregates were effectively inhibited. The slag and activator can serve as the raw materials for green concretes. 展开更多
关键词 Activity rate pozzolanic effect Alkali-aggregate reaction DURABILITY
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Clay mineralogy of the first and second members of the Nenjiang Formation, Songliao Basin: Implications for paleoenvironment in the Late Cretaceous 被引量:2
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作者 GAO Yuan XI DangPeng +2 位作者 QIN ZuoHuan MA PengFei WANG ChengShan 《Science China Earth Sciences》 SCIE EI CAS CSCD 2018年第3期327-338,共12页
The first and second members ofthe Nenjiang Formation (K2n1+2) in the Songliao Basin, northeast China, are an interval of dark-colored mudstone. Paleoenvironmental studies of these strata are useful for understandi... The first and second members ofthe Nenjiang Formation (K2n1+2) in the Songliao Basin, northeast China, are an interval of dark-colored mudstone. Paleoenvironmental studies of these strata are useful for understanding the terrestrial environment under a greenhouse climate and hydrocarbon accumulation in lake basins. In this study, clay mineralogy of the K2n1+2 from four borehole or outcrop sections is investigated to understand terrestrial paleoenvironment during the depositional period in the Late Cretaceous. In the mudstone samples, smectite and illite are the predominant clay minerals, and were derived from weathering of parent rocks in a temperate, sub-humid to sub-arid climate; kaolinite and chlorite are minor clay species. The difference in the clay-mineral assemblages between the eastern and western margins of the basin was primarily controlled by provenance lithology, and the high smectite content in the western basin resulted from alteration of volcanic rocks exposed in the Greater Xing'an Range area. The increasing illite content and ratio of illite/smectite percentages in the upper part of the first member of the Nenjiang Formation indicate paleoenvironmental change. This temporal change in the clay-mineral composition was primarily caused by a regionally cooler and drier paleoclimate, consistent with previous paleoenviroumental reconstructions. 展开更多
关键词 Clay mineral Nenjiang Formation Songliao Basin PALEOENVIRONMENT Late Cretaceous
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