International Journal of Mineral Processing最新文献_第9页

A methodology for the conceptual design of flotation circuits by combining group contribution, local/global sensitivity analysis, and reverse simulation 结合群体贡献、局部/全局敏感性分析和逆向模拟的浮选电路概念设计方法

International Journal of Mineral Processing Pub Date : 2017-07-10 DOI: 10.1016/j.minpro.2017.05.008

Felipe D. Sepúlveda , Freddy Lucay , Jorge F. González , Luis A. Cisternas , Edelmira D. Gálvez

引用次数: 14

Strategic evaluation of concentrator operational modes under geological uncertainty 地质不确定性条件下选矿厂经营模式的战略评价

International Journal of Mineral Processing Pub Date : 2017-07-10 DOI: 10.1016/j.minpro.2017.05.009

Alessandro Navarra , Andrew Menzies , Adam Jordens , Kristian Waters

引用次数: 7

Purification of coal fly ash leach liquor by solvent extraction: Identification of influential factors using Design of Experiments 溶剂萃取净化粉煤灰浸出液:用实验设计确定影响因素

International Journal of Mineral Processing Pub Date : 2017-07-10 DOI: 10.1016/j.minpro.2017.05.004

M.J. Rushwaya , S. Ndlovu

{"title":"Purification of coal fly ash leach liquor by solvent extraction: Identification of influential factors using Design of Experiments","authors":"M.J. Rushwaya , S. Ndlovu","doi":"10.1016/j.minpro.2017.05.004","DOIUrl":"10.1016/j.minpro.2017.05.004","url":null,"abstract":"<div>The solvent extraction of iron and titanium from coal fly ash leach solution was investigated by the use of Design of Experiments. The effect of the factors: hydrogen ion concentration, Primene JMT concentration, aqueous to organic volume phase ratio and temperature on iron and titanium extraction were evaluated. A two level factorial design implemented by statistical software Design Expert® 6, determined the significant factors and any associated interactive effects amongst these factors.Hydrogen ion concentration and the interaction between the aqueous to organic volume phase ratio with Primene JMT concentration had a significant effect on the extraction of iron while temperature did not. Hydrogen ion concentration and temperature did not have a significant effect on the extraction of titanium, while the interaction between Primene JMT concentration and the aqueous to organic volume phase ratio had a significant effect.The maximum iron extraction achieved in the implemented design was 33.8% while 99% of titanium could be extracted from the coal fly ash leach solution. Extraction improvement tests showed that at a hydrogen ion concentration of 0.28M, 88% iron and 99% titanium extraction from coal-fly ash leach solution could be achieved.</div>","PeriodicalId":14022,"journal":{"name":"International Journal of Mineral Processing","volume":"164 ","pages":"Pages 11-20"},"PeriodicalIF":0.0,"publicationDate":"2017-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.minpro.2017.05.004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48934457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

A fundamental study of octanohydroxamic acid adsorption on monazite surfaces 辛羟肟酸在独居石表面吸附的基础研究

International Journal of Mineral Processing Pub Date : 2017-07-10 DOI: 10.1016/j.minpro.2017.05.006

Wencai Zhang, Rick Honaker

{"title":"A fundamental study of octanohydroxamic acid adsorption on monazite surfaces","authors":"Wencai Zhang, Rick Honaker","doi":"10.1016/j.minpro.2017.05.006","DOIUrl":"10.1016/j.minpro.2017.05.006","url":null,"abstract":"<div>The adsorption mechanism of octanohydroxamic acid (OHA) on monazite was studied using kinetic, isotherm, and thermodynamic adsorption tests as well as FTIR, titration, and micro-flotation experiments. The adsorption mechanism was described as a chemisorption/surface precipitation process. At low OHA concentrations, adsorption occurred by chemisorption as a result of the reaction between surface active sites and OHA molecules. With an increase in concentration and interaction time, surface precipitation occurred. For chemisorption, adsorption was an exothermic and entropy driven process and maximum adsorption was achieved at pH  3.0, adsorption was achieved via chemisorption and hydrophobic bonding. However, a strong basic and higher temperature environment contributes to surface precipitation of basic rare earth hydroxamate. FTIR tests showed the movement of <img>CH2 band position from 2924cm−1 to 2920cm−1 with increases in pH values from 3.0 to 6.0, 9.0, and 11.0, which corresponds to the status of chemisorbed and surface precipitated OHA, respectively.</div>","PeriodicalId":14022,"journal":{"name":"International Journal of Mineral Processing","volume":"164 ","pages":"Pages 26-36"},"PeriodicalIF":0.0,"publicationDate":"2017-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.minpro.2017.05.006","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42736636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 21

Reduction roasting of hematite to magnetite using carbohydrates 利用碳水化合物将赤铁矿还原焙烧成磁铁矿

International Journal of Mineral Processing Pub Date : 2017-07-10 DOI: 10.1016/j.minpro.2017.05.005

V.P. Ponomar, N.O. Dudchenko, A.B. Brik

{"title":"Reduction roasting of hematite to magnetite using carbohydrates","authors":"V.P. Ponomar, N.O. Dudchenko, A.B. Brik","doi":"10.1016/j.minpro.2017.05.005","DOIUrl":"10.1016/j.minpro.2017.05.005","url":null,"abstract":"<div>Thermomagnetic analysis was conducted on phase transformations performed for synthetic and natural hematite by reduction involving various carbohydrates (starch, glucose, fructose, sucrose, and ascorbic acid). Thermomagnetic measurements were carried out using a laboratory facility that allows the automatic registration of a sample's magnetization as the temperature changes (the rate of sample heating/cooling was 65     °C. The magnetite formed by the reaction has a Curie temperature of 565     <!-->Am2/kg for the sample obtained from natural hematite. The difference in the value of saturation magnetization is attributed to a lower magnetite content for the sample obtained from natural hematite. Synthetic hematite transforms more effective, suggesting the synthetic sample is characterized by a larger surface area compared to natural hematite.</div>","PeriodicalId":14022,"journal":{"name":"International Journal of Mineral Processing","volume":"164 ","pages":"Pages 21-25"},"PeriodicalIF":0.0,"publicationDate":"2017-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.minpro.2017.05.005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46000207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 38

Investigation into changes in pastefill properties during pipeline transport 管道输送过程中膏体性质变化的研究

International Journal of Mineral Processing Pub Date : 2017-06-10 DOI: 10.1016/j.minpro.2017.04.003

Kelvin J. Creber, Maureen McGuinness, Mehrdad F. Kermani, Ferri P. Hassani

{"title":"Investigation into changes in pastefill properties during pipeline transport","authors":"Kelvin J. Creber, Maureen McGuinness, Mehrdad F. Kermani, Ferri P. Hassani","doi":"10.1016/j.minpro.2017.04.003","DOIUrl":"10.1016/j.minpro.2017.04.003","url":null,"abstract":"<div>A critical parameter in the design of pastefill distribution systems is the shear yield stress of the backfill. Yield stress is used in the hydraulic modelling to estimate the friction losses in the system and is generally assumed to be constant throughout the piping system. However, many sites report a change in slump during transport – sometimes up to 50<!--> mm. As slump is used as an indicator of yield stress, it can be hypothesized that that material rheology is changing during transport potentially due to changes in particle shape and size or pastefill temperature. By sampling pastefill at the surface and at the discharge point underground, in two Canadian mines, this study shows that the yield stress and temperature of pastefill does not remain constant through the distribution system. The size and shape of the backfill particles are analyzed and no remarkable changes are found. The effect of temperature on the yield stress is investigated through laboratory testing using slump tests and a rotational viscometer and indicate that temperature is a significant factor in the yield stress change.</div>","PeriodicalId":14022,"journal":{"name":"International Journal of Mineral Processing","volume":"163 ","pages":"Pages 35-44"},"PeriodicalIF":0.0,"publicationDate":"2017-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.minpro.2017.04.003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47402651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 20

Modeling and optimization of coal oil agglomeration using response surface methodology and artificial neural network approaches 基于响应面法和人工神经网络的煤油团聚建模与优化

International Journal of Mineral Processing Pub Date : 2017-06-10 DOI: 10.1016/j.minpro.2017.04.009

Anand Mohan Yadav , Suresh Nikkam , Pratima Gajbhiye , Majid Hasan Tyeb

{"title":"Modeling and optimization of coal oil agglomeration using response surface methodology and artificial neural network approaches","authors":"Anand Mohan Yadav , Suresh Nikkam , Pratima Gajbhiye , Majid Hasan Tyeb","doi":"10.1016/j.minpro.2017.04.009","DOIUrl":"10.1016/j.minpro.2017.04.009","url":null,"abstract":"<div>In this study, response surface methodology (RSM) and artificial neural network (ANN) were used to develop an approach to analyze the behavior of different process variables such as pulp density, oil dosage, agglomeration time, and particle size, which affects the coal oil agglomeration process using Linseed oil as a bridging liquid. The investigation was done using Box-Behnken design (BBD) of response surface methodology, the same design of experimental data was used in training with the artificial neural network, and the results obtained from the two methodologies were compared. The ANN model predicted responses with better accuracy with coefficient of determination (R2) 0.97 and 0.95 for % ash rejection and % organic matter recovery respectively in comparison to RSM-BBD R2 of 0.97 and 0.92 for % ash rejection and % organic matter recovery respectively. The optimal condition established for the high % ash rejection and % organic matter recovery were pulp density (3.002%), oil dosage (15%), agglomeration time (15min), particle size (0.168mm) with predicted % ash rejection and % organic matter recovery as 68.00% and 95.24% respectively, with the desirability of 96.90%. The proposed optimal conditions were examined in the laboratory and the % ash rejection and % organic matter recovery achieved as 64.60% and 93.93 respectively.</div>","PeriodicalId":14022,"journal":{"name":"International Journal of Mineral Processing","volume":"163 ","pages":"Pages 55-63"},"PeriodicalIF":0.0,"publicationDate":"2017-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.minpro.2017.04.009","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46275446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 29

Extraction of Ga and Ge from zinc refinery residues in H2C2O4 solutions containing H2O2 在含H2O2的H2C2O4溶液中提取锌精炼厂废渣中的Ga和Ge

International Journal of Mineral Processing Pub Date : 2017-06-10 DOI: 10.1016/j.minpro.2017.04.005

Fupeng Liu , Zhihong Liu , Yuhu Li , Benjamin P. Wilson , Mari Lundström

{"title":"Extraction of Ga and Ge from zinc refinery residues in H2C2O4 solutions containing H2O2","authors":"Fupeng Liu , Zhihong Liu , Yuhu Li , Benjamin P. Wilson , Mari Lundström","doi":"10.1016/j.minpro.2017.04.005","DOIUrl":"10.1016/j.minpro.2017.04.005","url":null,"abstract":"<div>A new oxalic acid (H2C2O4) and hydrogen peroxide (H2O2) based extraction process was developed to recover valuable metals - in particular Ga and Ge - from the zinc refinery residues. H2C2O4 and H2O2 leaching studies indicated that the selective leaching of metals in the residues, that primarily contain Zn, Cu, Fe, SiO2, Ga and Ge, can be achieved. Under the optimal leaching conditions ([H2C2O4]=110g/L, [H2O2]=0.12mol/L, L/S ratio=8, T=40°C and t=30min), 99.32% of the Ga, 98.86% of the Ge and 30.25% of the Fe were leached out, whereas the leaching of Zn, Cu and Si only reached 0.30%, 0.82% and 0.43%, respectively. Concerning leachate purification, 98.31% of the iron could be removed in the form of FeC2O4·2H2O with minor losses of Ga and Ge (1.08% and 0.68%) using an ultrasound-assisted iron powder replacement method under optimal conditions. The Ga (99.36%) and Ge (99.89%) were subsequently extracted by tri(octyl-decyl)amine (N235). After extraction, the loaded organic phase was stripped of Ga (98.91%) and Ge (99.21%) into separate solutions using sequential treatments of 2mol/L H2SO4 and 4<!--> mol/L NaOH respectively. Based on these results, a process flow sheet of efficient separation and recovery of Ga and Ge is presented.</div>","PeriodicalId":14022,"journal":{"name":"International Journal of Mineral Processing","volume":"163 ","pages":"Pages 14-23"},"PeriodicalIF":0.0,"publicationDate":"2017-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.minpro.2017.04.005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47908293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 27

Enrichment and migration regularity of fine coal particles in enhanced gravity concentrator 煤细颗粒在强化重力选矿机中的富集与迁移规律

International Journal of Mineral Processing Pub Date : 2017-06-10 DOI: 10.1016/j.minpro.2017.04.007

Zhu Xiang-nan, Tao You-jun, Sun Qi-xiao, Man Zhong-pei

{"title":"Enrichment and migration regularity of fine coal particles in enhanced gravity concentrator","authors":"Zhu Xiang-nan, Tao You-jun, Sun Qi-xiao, Man Zhong-pei","doi":"10.1016/j.minpro.2017.04.007","DOIUrl":"10.1016/j.minpro.2017.04.007","url":null,"abstract":"<div>Enrichment and migration regularity of coal particles in compound force field provided by Falcon concentrator were studied. Influence of centrifugal force and fluidization water pressure on the distribution rates and ash contents of materials that enriched in overflow, top separation area and bottom separation area were tested respectively. Radial velocity of fluidization water, having an important influence on the sedimentation of particles, was calculated and results show that radial velocity of fluidization water in top groove is greater than that in bottom groove, which contributed to the selectivity and recovery of combustible. Besides, density composition of products in different enrichment areas was studied. Results show that in the upward migration process, particles with high density are gradually captured. Therefore, the material density is gradually reduced from bottom to top separation area. Meanwhile, mismatch phenomena occurred as the existence of heavy particles in overflow, and light particles in the grooves. Based on the morphology analysis, it is can be deduced that particles mismatch is the results of the increase of drag coefficient since the irregular shape.</div>","PeriodicalId":14022,"journal":{"name":"International Journal of Mineral Processing","volume":"163 ","pages":"Pages 48-54"},"PeriodicalIF":0.0,"publicationDate":"2017-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.minpro.2017.04.007","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43953713","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 18

Utilization of N-carboxymethyl chitosan as selective depressants for serpentine on the flotation of pyrite n -羧甲基壳聚糖作为蛇纹石选择性抑制剂在黄铁矿浮选中的应用

International Journal of Mineral Processing Pub Date : 2017-06-10 DOI: 10.1016/j.minpro.2017.04.008

Cheng Zhang, Cheng Liu, Qiming Feng, Yanfei Chen

引用次数: 44