International Journal of Mineral Processing最新文献_第5页

Evolution of impact breakage characterisation: Re-defining t-family relationship 冲击破碎特征的演变:重新定义t族关系

International Journal of Mineral Processing Pub Date : 2017-11-10 DOI: 10.1016/j.minpro.2017.10.001

Grant R. Ballantyne, Benjamin Bonfils, Malcolm S. Powell

{"title":"Evolution of impact breakage characterisation: Re-defining t-family relationship","authors":"Grant R. Ballantyne, Benjamin Bonfils, Malcolm S. Powell","doi":"10.1016/j.minpro.2017.10.001","DOIUrl":"10.1016/j.minpro.2017.10.001","url":null,"abstract":"<div>Accurate characterisation of ore competence through controlled single particle impact can enable improved modelling of comminution process response to ore variability. A simple relationship is presented to relate the energy input and feed particle size to the breakage progeny with two fitting parameters. Previous techniques have focused either on low energy repeated impacts or high energy single impacts and have been applied over relatively small ranges of particle sizes. The method presented builds on previous understanding to unite these two disparate fields on feed particle sizes over more than two orders of magnitude. The method has been tested on 5 ores from 37.5   <!-->kWh/t. The resultant standard error of 3.3% is lower than other benchmarked models, with considerably fewer fitting parameters and no use of splining functions required. The direct calculation of appearance function for any feed size and input energy renders the proposed model well suited to incorporation in comminution process models. Further testing is required on additional ores, and further interpretation is required to obtain mechanistic explanations for the empirical fits to the model parameters.</div>","PeriodicalId":14022,"journal":{"name":"International Journal of Mineral Processing","volume":"168 ","pages":"Pages 126-135"},"PeriodicalIF":0.0,"publicationDate":"2017-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.minpro.2017.10.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49130236","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: 8

Sodium peroxide fusion for reliable determination of gold in ores and metallurgical samples 过氧化钠熔合法可靠测定矿石和冶金样品中的金

International Journal of Mineral Processing Pub Date : 2017-11-10 DOI: 10.1016/j.minpro.2017.09.001

Lou Daniel, Damian W. Laird, Glenn T. Hefter

{"title":"Sodium peroxide fusion for reliable determination of gold in ores and metallurgical samples","authors":"Lou Daniel, Damian W. Laird, Glenn T. Hefter","doi":"10.1016/j.minpro.2017.09.001","DOIUrl":"10.1016/j.minpro.2017.09.001","url":null,"abstract":"<div>A protocol based on peroxide fusion has been developed for the determination of Au in metallurgical samples and ores covering a wide range of concentrations and diverse mineralogies. The quantity of Na2O2 required was minimised, while maintaining lixiviant efficacy, by the use of mixed NaOH + Na2O2 fluxes. The method was shown to be particularly applicable to the determination of coarsely-particulate gold. Fusion cakes were dissolved in hydrochloric acid and then extracted using methylisobutylketone to provide concentrations appropriate for quantification by graphite furnace atomic absorption spectroscopy and to minimise interferences from dissolved salts. The protocol was tested on a variety of certified reference materials and produced results in excellent agreement (at Au concentrations ranging from 0.05 to 47   <!-->1) with the traditional lead fire assay method, while avoiding the health and safety issues associated with that technique.</div>","PeriodicalId":14022,"journal":{"name":"International Journal of Mineral Processing","volume":"168 ","pages":"Pages 35-39"},"PeriodicalIF":0.0,"publicationDate":"2017-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.minpro.2017.09.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46956354","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: 4

Influence of polymer powder on properties of cemented paste backfill 聚合物粉末对水泥浆充填体性能的影响

International Journal of Mineral Processing Pub Date : 2017-10-10 DOI: 10.1016/j.minpro.2017.07.013

Babak Koohestani , Bruno Bussière , Tikou Belem , Ahmed Koubaa

{"title":"Influence of polymer powder on properties of cemented paste backfill","authors":"Babak Koohestani , Bruno Bussière , Tikou Belem , Ahmed Koubaa","doi":"10.1016/j.minpro.2017.07.013","DOIUrl":"10.1016/j.minpro.2017.07.013","url":null,"abstract":"<div>This study investigates the influence of ethylene-vinyl acetate/vinyl ester of versatic acid (EVA/VE), a redispersible polymer powder, on the mechanical, chemical, and microstructural properties of sulfidic and non-sulfidic cemented paste backfill (CPB). Different EVA/VE amounts (7.5 to 20<!--> wt% of cement mass) are examined in CPB mixtures. To assess the influence of EVA/VE on the CPBs consistency (fresh state), slump height was measured using a small Abram's cone. Uniaxial compressive strength (UCS) testing was conducted to determine the influence of polymer powder on the mechanical strength development of CPBs, and mercury intrusion porosimetry (MIP), scanning electron microscopy (SEM), and differential thermogravimetric analysis (DTG) were used to determine the influence of polymer powder on the microstructure and mineralogy of hardened CPBs. The achieved results implicated the dependency of polymer powder effectiveness on the tailings type. Of the different polymer powder proportions used in this study, the addition of 15% EVA/VE (based on the mass of binder) was only effective in improving UCS values of sulfidic tailings. The MIP, DTG, and SEM results also indicate that the addition of 15% polymer powder was beneficial for chemical and microstructural improvement of sulfidic CPBs only.</div>","PeriodicalId":14022,"journal":{"name":"International Journal of Mineral Processing","volume":"167 ","pages":"Pages 1-8"},"PeriodicalIF":0.0,"publicationDate":"2017-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.minpro.2017.07.013","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46624976","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: 24

Synthesis of a cationic organic silicone surfactant and its application in the flotation of smithsonite 阳离子有机硅表面活性剂的合成及其在菱锌矿浮选中的应用

International Journal of Mineral Processing Pub Date : 2017-10-10 DOI: 10.1016/j.minpro.2017.07.008

Rongdong Deng , Weiran Zuo , Jiangang Ku , Zhengguo Yang , Yuan Hu

{"title":"Synthesis of a cationic organic silicone surfactant and its application in the flotation of smithsonite","authors":"Rongdong Deng , Weiran Zuo , Jiangang Ku , Zhengguo Yang , Yuan Hu","doi":"10.1016/j.minpro.2017.07.008","DOIUrl":"10.1016/j.minpro.2017.07.008","url":null,"abstract":"<div>A cationic organic silicone surfactant (DTA) with specially designed functional groups was developed as a flotation collector for smithsonite. This surfactant was synthesized via the reaction between hexaethyldisiloxane and N-β-(aminoethyl)-γ-aminoisobutylmethyldimethoxy silane using tetramethylammonium hydroxide as a catalyst. Its flotation performance was validated by flotation tests using pure minerals. The results illustrated that DTA has strong collecting ability and better selectivity for smithsonite against quartz, calcite and dolomite compared to the traditional collectors such as octadecylamine, tetradecylamine and dodecylamine. Based on the analysis of FTIR spectra, zeta-potential measurements, X-ray photoelectron spectroscopy and density functional theory calculations, it can be concluded that the adsorption mechanism of DTA on the surface of smithsonite was mainly dominated by chemisorption and electrostatic adsorption. DTA's unique properties, which include two coordination sites (<img>NH2 and <img>NH<img>), and the “parachute” shape structure of <img>OSi(C2H5)3, resulted in superior collecting powers for smithsonite.</div>","PeriodicalId":14022,"journal":{"name":"International Journal of Mineral Processing","volume":"167 ","pages":"Pages 113-121"},"PeriodicalIF":0.0,"publicationDate":"2017-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.minpro.2017.07.008","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42607506","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: 26

Abrasion wear resistance of wall lining materials in bins and chutes during iron ore mining 铁矿开采仓和溜槽壁衬材料的耐磨性

International Journal of Mineral Processing Pub Date : 2017-10-10 DOI: 10.1016/j.minpro.2017.08.002

Wei Chen, Subhankar Biswas, Alan Roberts, Jayne O'Shea, Kenneth Williams

引用次数: 10

Enhancing flotation performance of low rank coal by improving its hydrophobicity and the property of oily bubbles using 2-ethylhexanol 利用2-乙基己醇改善低阶煤的疏水性和油泡性质，提高其浮选性能

International Journal of Mineral Processing Pub Date : 2017-10-10 DOI: 10.1016/j.minpro.2017.07.014

Songjiang Chen , Longfei Tang , Xiuxiang Tao , Huan He , Liang Chen , Zhao Yang

{"title":"Enhancing flotation performance of low rank coal by improving its hydrophobicity and the property of oily bubbles using 2-ethylhexanol","authors":"Songjiang Chen , Longfei Tang , Xiuxiang Tao , Huan He , Liang Chen , Zhao Yang","doi":"10.1016/j.minpro.2017.07.014","DOIUrl":"10.1016/j.minpro.2017.07.014","url":null,"abstract":"<div>In this paper, the influence of 2-ethylhexanol used as a modifier/emulsifier on the surface chemical property of low rank coal and its flotation performance was investigated. According to the FTIR analysis, it showed an obvious decline in the hydrophilic groups while an increase in the hydrophobic groups on the surface of coal after pretreatment by 2-ethylhexanol solution for 12 h, resulting in the increase of contact angle from 74.9° to 95.4°. Whereas the induction time showed a significant decrease from 246.0  ms, which meant the better hydrophobicity and floatability of coal particles after the pretreatment. As a result, a better flotation efficiency of low rank coal was attained after the pretreatment. Additionally, the oily bubble flotation combining 2-ethylhexanol was employed to enhance the flotation of coal samples. The results indicated that the mixture of diesel oil and 2-ethylhexanol improved the collecting power and selectivity of oily bubbles, with the oil contact angle for coal samples decreasing from 17.8° to 14.5° and the induction time from 50  ms. The performance of oily bubble flotation, especially using the mixed diesel oil bubbles, was much better than that of conventional flotation, and the recovery of combustible matter and flotation efficiency index increased from 43.42% and 29.52% up to 89.27% and 59.91% respectively. Consequently, the flotation performance of low rank coal may be enhanced by the surface modification of 2-ethylhexanol as well as the novel oily bubble flotation technology.</div>","PeriodicalId":14022,"journal":{"name":"International Journal of Mineral Processing","volume":"167 ","pages":"Pages 61-67"},"PeriodicalIF":0.0,"publicationDate":"2017-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.minpro.2017.07.014","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45728361","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: 42

Comparative studies of two cationic collectors in the flotation of pyrolusite and calcite 两种阳离子捕收剂在软锰矿和方解石浮选中的比较研究

International Journal of Mineral Processing Pub Date : 2017-10-10 DOI: 10.1016/j.minpro.2017.07.016

Shima Rahimi, Mehdi Irannajad, Akbar Mehdilo

{"title":"Comparative studies of two cationic collectors in the flotation of pyrolusite and calcite","authors":"Shima Rahimi, Mehdi Irannajad, Akbar Mehdilo","doi":"10.1016/j.minpro.2017.07.016","DOIUrl":"10.1016/j.minpro.2017.07.016","url":null,"abstract":"<div>The collecting ability of dodecylamine (DDA) and dodecyltrimethylammonium chloride (DTAC) as two cationic collectors was investigated in the flotation of pyrolusite and calcite by carrying out the flotation experiments, FTIR analysis, zeta potential tests and contact angle measurements. The single mineral flotation experiments show that the maximum differences between the floatability of pyrolusite and calcite occurring at a pH of 7.5 in the presence of DTAC is more than that of DDA. This means that DTAC acts more selectively than the DDA collector. In the microflotation experiments carried out on the artificially mixed minerals, the MnO content and recovery in the pyrolusite concentrate obtained by DDA collector is greater than that achieved by DTAC. As evidenced by ore flotation results and contact angle measurements, in the presence of both collectors, sodium carbonate acts more effective than calcium chloride as calcite depressant agents. In the ore flotation experiments, a pyrolusite concentrate containing higher MnO grade and recovery is obtained using DDA collector in comparison with DTAC. These results indicate that the collecting power of DDA is significantly more than DTAC collector. FTIR analysis and zeta potential tests show that both collectors adsorb on the surface of pyrolusite and calcite through the electrostatic interactions. Also, these analyses indicate that the adsorption of DDA on the surface of both minerals is greater and stronger than that of the DTAC collector.</div>","PeriodicalId":14022,"journal":{"name":"International Journal of Mineral Processing","volume":"167 ","pages":"Pages 103-112"},"PeriodicalIF":0.0,"publicationDate":"2017-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.minpro.2017.07.016","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48017469","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: 10

A novel process to prepare high-titanium slag by carbothermic reduction of pre-oxidized ilmenite concentrate with the addition of Na2SO4 预氧化钛精矿添加Na2SO4碳热还原制备高钛渣的新工艺

International Journal of Mineral Processing Pub Date : 2017-10-10 DOI: 10.1016/j.minpro.2017.08.004

Wei Lv , Xuewei Lv , Junyi Xiang , Yingyi Zhang , Shengping Li , Chenguang Bai , Bing Song , Kexi Han

{"title":"A novel process to prepare high-titanium slag by carbothermic reduction of pre-oxidized ilmenite concentrate with the addition of Na2SO4","authors":"Wei Lv , Xuewei Lv , Junyi Xiang , Yingyi Zhang , Shengping Li , Chenguang Bai , Bing Song , Kexi Han","doi":"10.1016/j.minpro.2017.08.004","DOIUrl":"10.1016/j.minpro.2017.08.004","url":null,"abstract":"<div>In this paper, a novel process was studied for the recovery of iron and titanium from ilmenite concentrate. The ilmenite powders first underwent an oxidation pretreatment and were reduced isothermally at 1350–1450 <!-->°C by graphite with the addition of Na2SO4. The influence of temperature, C/O molar ratio and the dosage of the added Na2SO4 on the metallization ratio, phase transformation and titanium grade were studied. The results demonstrated that Na2SO4 not only significantly promotes the aggregation and growth of metallic iron-grain particles but also enhances the reduction ability. Under the promotion of added Na2SO4, the highest metallization ratio reached 94%, and the theoretical calculation of the highest grade of titanium dioxide is approximately 75%. The Na2SO4 additive decreases the melting point of the slag and metal, resulting in the effect of semi-melting reduction. The carbothermic reduction order of phase transitions of pre-oxidized ilmenite concentrate was also discussed.</div>","PeriodicalId":14022,"journal":{"name":"International Journal of Mineral Processing","volume":"167 ","pages":"Pages 68-78"},"PeriodicalIF":0.0,"publicationDate":"2017-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.minpro.2017.08.004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43398765","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 nickel and cobalt from nickeliferous limonitic laterite ore using borax containing slags 用含硼砂渣从含镍褐铁矿中提取镍钴

International Journal of Mineral Processing Pub Date : 2017-10-10 DOI: 10.1016/j.minpro.2017.07.012

Mehmet Hakan Morcali , Leili Tafaghodi Khajavi , David B. Dreisinger

{"title":"Extraction of nickel and cobalt from nickeliferous limonitic laterite ore using borax containing slags","authors":"Mehmet Hakan Morcali , Leili Tafaghodi Khajavi , David B. Dreisinger","doi":"10.1016/j.minpro.2017.07.012","DOIUrl":"10.1016/j.minpro.2017.07.012","url":null,"abstract":"<div>The diminishing availability of nickel sulfide ores and the increasing demand for nickel and its compounds have led to a growing interest in laterite deposits as an alternative source for producing nickel. However, extracting nickel from laterite ores differs from sulfides because nickel contained minerals are generally disseminated throughout the ore. Laterites cannot be concentrated using classic mineral processing techniques such as flotation.The present study proposes a new smelting process for limonitic nickeliferous laterite ore in order to separate nickel and cobalt from the ore and produce a nickel matte at lower smelting temperature compared with the current industrial techniques. The nickel and cobalt recoveries were evaluated at various flux additions. The highest recovery condition for Ni (98% Ni recovery with Ni content of 10  +35%Na2B4O7·10H2O+15%SiO2), 0.8g coke and 5g elemental sulfur to 25g of the roasted ore. The above conditions led to achieving 95% Co recovery with 0.06% Co.</div>","PeriodicalId":14022,"journal":{"name":"International Journal of Mineral Processing","volume":"167 ","pages":"Pages 27-34"},"PeriodicalIF":0.0,"publicationDate":"2017-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.minpro.2017.07.012","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48534854","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: 28

Development of a machine vision system for real-time monitoring and control of batch flotation process 间歇式浮选过程实时监测与控制的机器视觉系统的开发

International Journal of Mineral Processing Pub Date : 2017-10-10 DOI: 10.1016/j.minpro.2017.07.011

A. Jahedsaravani , M. Massinaei , M.H. Marhaban

{"title":"Development of a machine vision system for real-time monitoring and control of batch flotation process","authors":"A. Jahedsaravani , M. Massinaei , M.H. Marhaban","doi":"10.1016/j.minpro.2017.07.011","DOIUrl":"10.1016/j.minpro.2017.07.011","url":null,"abstract":"<div>Substantial progresses have been made over the past decade in using machine vision for automatic control of the froth flotation process. A machine vision system is able to extract the visual features from the captured froth images and present the results to process control systems. The current research work is concerned with the development and implementation of a machine vision system for real time monitoring and control of a batch flotation system. The proposed model-based control system comprises two in-series models connecting the process variables to the froth features and the metallurgical parameters along with a stabilizing fuzzy controller. The results indicate the developed machine vision based control system is able to accurately predict the metallurgical parameters of the existing batch flotation system from the extracted froth features and efficiently maintain them at their set-points despite step disturbances in the process variables. Furthermore, the proposed control system leads to higher target values for the metallurgical parameters than the previously developed system (RCu     =11.2% vs. RCu     =8.1%).</div>","PeriodicalId":14022,"journal":{"name":"International Journal of Mineral Processing","volume":"167 ","pages":"Pages 16-26"},"PeriodicalIF":0.0,"publicationDate":"2017-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.minpro.2017.07.011","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44274367","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: 17