期刊文献+
共找到4篇文章
< 1 >
每页显示 20 50 100
Mineralogical Characterization of a Polymetallic Sulfide Ore to Improve Silver Recovery 被引量:1
1
作者 陈代雄 XIAO Jun 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2017年第3期501-507,共7页
Based on the mineralogical characterization for the polymetallic sulfide ore, the way to improve silver recovery was studied. The results showed that silver was the most valuable metal whose grade was 448.82 g/t Ag, w... Based on the mineralogical characterization for the polymetallic sulfide ore, the way to improve silver recovery was studied. The results showed that silver was the most valuable metal whose grade was 448.82 g/t Ag, while 0.118% Cu, 1.65% Pb and 1.06% Zn may be comprehensively utilizated. The main silver-bearing minerals were argent and aregentite which accounted for 87.18% of total silver. Argentite and other metal minerals were distributed in the gangue minerals in complex forms. Argentite grains of 33.76% minus 50 μm indicated that a fine grinding scheme was necessary to enhance the degree of dissociation, and meanwhile selective grinding must be considered to prevent a complete grinding of coarse grains. The optimum regrinding fineness in the Cu flotation was determined as 73% minus 37 μm, while grains of 68.5% minus 74 μm in one-stage grinding remained unchanged as much as possible. Consequently, silver recovery increased to 2.68%, as well as the content of Pb simultaneously decreased from 7.26% to 2.68% in the Cu concentrate. From the lead pyrometallurgical point of view, recovering larger amounts of silver and lead at the expense of decreasing the grade of lead to a suitable level is not only economically viable for the plant, but also convenient for subsequent processing. Silver and lead recovery increased to 13.18% and 12.58%, respectively, while the Pb grade decreased from 53.1% to 46.12% for the Pb concentrate. 展开更多
关键词 polymetallic sulfide ore mineralogy characterization regrinding silver recovery
下载PDF
Evaluation of the use of sublevel open stoping in the mining of moderately dipping medium-thick orebodies 被引量:5
2
作者 Shuai Xu Ruiyu Liang +1 位作者 Fidelis TSuorineni Yuanhui Li 《International Journal of Mining Science and Technology》 SCIE EI CAS CSCD 2021年第2期333-346,共14页
The flow of blasted ore during mining of moderately dipping medium-thick orebodies is a challenge.Selecting a suitable mining system for such ore bodies is difficult.This paper proposes a diamond layout sublevel open ... The flow of blasted ore during mining of moderately dipping medium-thick orebodies is a challenge.Selecting a suitable mining system for such ore bodies is difficult.This paper proposes a diamond layout sublevel open stoping system using fan blastholes with backfilling to mine such orebodies.To evaluate the performance of system the relationships between ore recovery and stope footwall dip angle,footwall surface roughness,drawpoint spacing and production blast ring burden were investigated.An ore recovery data set from 81 laboratory physical model experiments was established from combinations of the listed factors.Various modules in a back propagation neural network structure were compared,and an optimal network structure identified.An ore recovery backpropagation neural network(BPNN)forecast model was developed.Using the model and sensitivity analysis of the factors affecting the proposed open stope mining system,the significance of each factor on ore recovery was studied.The study results were applied to a case study at the Shandong Gold Group Jiaojia Gold Mine.The results showed that the application of a BPNN and sensitivity analysis models for ore recovery prediction in the proposed mining system and field experimental results confirm that the suggested mining method is feasible. 展开更多
关键词 Moderately dipping medium-thick orebody Sublevel open stoping Fan blastholes ore recovery Backpropagation neural network
下载PDF
Improving gold recovery of Pb–Zn sulfide ore by selective activation with organic acid 被引量:3
3
作者 Dai-Xiong Chen Jun Xiao 《Rare Metals》 SCIE EI CAS CSCD 2016年第2期198-203,共6页
Free gold and gold wrapped in sulfides are considered as the object of gold floatation. However,floatation of free gold exhibits more variables in practice.In this study, improving gold recovery of a Pb-Zn sulfide ore... Free gold and gold wrapped in sulfides are considered as the object of gold floatation. However,floatation of free gold exhibits more variables in practice.In this study, improving gold recovery of a Pb-Zn sulfide ore from Yunnan Province, China, was investigated. The results show that free gold and auriferous sulfides account for 94.99 % of total gold. Without adding organic acid in floatation, only 82 % recovery of gold could be obtained.Gold recovery in Au/Pb concentrates increases by 9.29 %with oxalate added and by 7.35 % with citric acid added,respectively, while performances of lead and arsenic nearly keep a constant. A possible reason is that free gold is of wonderful selectivity against pyrite with organic activators.A new method to enhance gold recovery is proposed. 展开更多
关键词 Gold Improving recovery Pb-Zn sulfide ore Selective activation Organic acid
原文传递
Niobium and phosphorus behavior during melting-separation process of pre-reduced niobium ore concentrate 被引量:2
4
作者 Yu-bao Liu Zhi-hong Zhang +3 位作者 Er-xiong Zhao Xian-heng Zhang Xiao-qing Wang Guo-hua Chen 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2017年第7期691-696,共6页
The pre-reduced Bayan Obo ferroniobium(FeNb)ore concentrate block was taken as raw materials for studying the physical properties of niobium-enriched slag and changes in niobium recovery rate.In addition,the dephosp... The pre-reduced Bayan Obo ferroniobium(FeNb)ore concentrate block was taken as raw materials for studying the physical properties of niobium-enriched slag and changes in niobium recovery rate.In addition,the dephosphorization rate of the slag under different melting-separation conditions was investigated using the melting-separation test.The research results demonstrate that(i)the niobium recovery rate and dephosphorization rate of the slag decrease with the increase in melting-separation temperature;(ii)the niobium recovery rate of the slag initially increases and then decreases with increase in basicity and time;and(iii)the dephosphorization rate of the slag increases with the increase in basicity and time.When the test was performed under the conditions of basicity of 0.6-0.7,time of 7-10min,and temperature of 1400-1450°C,the niobium recovery rate and dephosphorization rate are over 96%and 95%,respectively.By scanning electron microscopy,it is observed that niobium mainly exists in the form of calcium and titanium silicate within the slag phase,with uneven distribution. 展开更多
关键词 Melting separation Pre-reduced niobium ore concentrate Niobium-enriched slag Iron Dephosphorization rate Niobium recovery rate
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部