Optimization of the reagent types and dosage in selective flotation of Cu-Zn Taknar mine by using D-Optimal method of statistical experiments design
S.M.J
Koleini
Tarbiat modares university
author
F
Soltani
Tarbiat modares university
author
M
Abdollahy
Tarbiat modares university
author
text
article
2013
per
In this research, optimization and modeling of chalcopyrite-sphalerite-pyrite selective flotation of TAKNAR Cu-Zn ore with 2.91% Zn and 1.26% Cu conducted by using D-Otimal method of experiments design. Process input factors were: A) four mixed collector types (MC1, MC2, MC3 and MC4), B) Tow depressant systems: (CuCN (60 g/t) – ZnSO4 ((200-500 g/t)) system and dextrin – ZnSO4 system) and C) pH (8-12). According to the results obtained from experiments, quadratic model for both Cu and Zn recovery and linear model for pyrite content in Cu concentrate were selected. For both Cu and Zn recovery responses, the mixed collector type factor was the most important one and for pyrite content, pH was the most important factor. In optimum flotation conditions, Cu recovery, Zn recovery and pyrite content were 89.04%, 25.3% and 2.02% respectively, with MC2 as mixed collector, dextrin as pyrite depressant, ZnSO4 dosage of 500 g/t and pH=11.35. When ZnSO4 consumption was minimized, Cu recovery, Zn recovery and pyrite content were 88.94%, 31.24% and 1.45% in pH=11.93. Meanwhile MC3 wasn’t as effective as MC2 in selectivity between chalcopyrite, sphalerite and pyrite, it had better performance for Cu recovery and increased Cu recovery approximately 2%. (MC1=SIPX+Aero3477، MC2=SIPX+Aero238، MC3=SIPX+TC1000 و MC4=SIPX+X231)
Journal of Mining Engineering
Iranian Society of Mining Engineering (IRSME)
1735-7616
8
v.
19
no.
2013
1
11
https://ijme.iranjournals.ir/article_4072_df7d76ede94e796cd8f1fb8c7300abd4.pdf
Designing the Zn cleaner columns flotation of Bama plant using feasibility tests
A.A
Abdollahzadeh
Kashan University
author
H
darabi
Kashan University
author
text
article
2013
per
Due to the advantages of column flotation cells compared to mechanical ones and the tendency of mineral processing industry to replace them, in this research the possibility of replacing the mechanical cells of Bama Zn cleaner stage with a column cell investigated using alaboratory column with 10 cm diameter and 400 cm height. For this purpose, 21 feasibility tests were designed using CCD method of experiments design.Four input factors including froth height, feed flow rate, wash water flow rate and aeration flow rate and three responses including grade, recovery and separation efficiency of Zn were considered. The influence of input factors on obtained responses investigated. Optimization of operational factors aimed at maximizing the Zn separation efficiency. In optimum conditions, froth height, feed flow rate, wash water flow rate, aeration flow rate and separation efficiency were 65 cm, 3.45 L/min, 0.65 L/min, 3 L/min and 43.94 %, respectively. Results in optimum conditions showed that the performance of column flotation resulted in increasing 3.62% in grade, 2.22% in Zn recovery and 4.75% in separation efficiency. In addition, using the obtained data, a column flotation cell for Zn cleaner stage of Bama plant with 2 m diameter and 12 m height was designed, which is divided into 4 parts. This column could be replaced to 4 stages of mechanical cleaner and re-cleaner mechanical cells of Bama plant.
Journal of Mining Engineering
Iranian Society of Mining Engineering (IRSME)
1735-7616
8
v.
19
no.
2013
13
24
https://ijme.iranjournals.ir/article_4269_c840d69f26d2bc6c6e50e8e342f0be92.pdf
Discrimination and Identification of Hydrothermal Alteration Types Related to Porphyry Copper Deposits, Using Hyperion Hyperspectral Data
E
Hamzelo
Birjand University
author
M
Masinaei
Birjand University
author
N
Mehrshad
Birjand University
author
text
article
2013
per
The technological development in manufacturing and installation of new optical sensors for hyperspectral image acquisition, which collect images in order of hundreds of spectral bands, have been used for remote sensing of the rocks and minerals in recent years. The aim of this study is to evaluate Hyperion hyperspectral data for mapping of hydrothermally altered areas and iron oxides bearing areas related to porphyry copper ore deposits. The study area is located in Urumiyeh-Dokhtar magmatic belt that hosts many important porphyry copper deposits such as Darrehzar and Sar Cheshmeh, which are located southwest of Kerman city. The spectra are extracted from images using pixel Purity Index method. These spectra were used for recognition of different hydrothermal alteration zones, using spectral angle mapper. The hydrothermal alteration and iron oxide minerals were mapped and validated through field checking.
Journal of Mining Engineering
Iranian Society of Mining Engineering (IRSME)
1735-7616
8
v.
19
no.
2013
25
33
https://ijme.iranjournals.ir/article_4581_09da0b4e379a9527771dda9897b64791.pdf
Spread-Sheet Based Modeling of Coal Flotation Circuits
- Case Study:The Zarand Coal Washing Plant
صمد
بنیسی
دانشگاه شهید باهنر کرمان
author
امیر
حاجی زاده عمران
محقق
author
غلامعباس
پارسا پور
دانشجوی دکتری - دانشگاه شهید باهنر کرمان
author
text
article
2013
per
One of the problems of flotation circuit of the Zarand coal washing plants like other processing plants is the wide variations in feed characteristics. By modeling flotation circuit, the effect of feed variation on the metallurgical parameters (yield and ash content) could be predicted and necessary measures then can be taken to achieve the desired targets. To perform this task, the first order kinetics model with distributed rate constants based on particles size classes was used. The characteristics of feed species and pulp residence time distribution in each flotation bank were among the main variables involved in the modeling. A tracer method using salt was utilized to determine the pulp residence time distribution. The average residence times for rougher, scavenger, and cleaner stages were found to be 6.6, 9.6 and 12.6 min, respectively. Based on flotation tests, the feed was grouped into five species namely, fast-floating non-ash, slow floating non-ash, fast floating ash, slow floating ash, and non-floating ash and non-ash. Modeling was performed considering the contribution of each species and corresponding rate constants. The verification of the modeling results indicated that estimated metallurgical parameters were in good agreement with the plant data. It was found that with a 95% confidence the absolute difference between the calculated and plants values were 1.37-5.7% for yield and -0.9-0.4 % for the concentrate ash content.
Journal of Mining Engineering
Iranian Society of Mining Engineering (IRSME)
1735-7616
8
v.
19
no.
2013
35
44
https://ijme.iranjournals.ir/article_10798_eed646ffe3011a14139d19ab63e9f357.pdf
Modeling Spread-Sheet Based of Coal Flotation Circuits
Case Study:The Zarand Coal Washing Plant
M
Hayati
Shahrood university
author
M
Ataei
shahrood university
author
R
Rafiei
shahrood university
author
S.M.E
Jalali
shahrood university
author
text
article
2013
per
One of problems of the flotation circuit of the Zarand coal washing plants like other processing plants is the wide variations in feed characteristics. By modeling flotation circuit, the effect of feed variation on the metallurgical parameters (yield and ash content) could be predicted and necessary measures could then be taken to achieve the desired targets. To perform this task, the first order kinetics model with distributed rate constants based on particles size classes was used. The characteristics of feed species and pulp residence time distribution in each flotation bank are among the main variables involved in the modeling. A tracer method using salt was utilized to determine the pulp residence time distribution. The average residence times for rougher, scavenger, and cleaner stages were found to be 6.6, 9.6 and 12.6 min, respectively. Based on flotation tests, the feed was grouped into five species namely, fast-floating non-ash, slow floating non-ash, fast floating ash, slow floating ash, and non-floating ash and non-ash. Modeling was performed considering the contribution of each species and corresponding rate constants. The verification of the modeling results indicated that estimated metallurgical parameters were in good agreement with the plant data. It was found that with a 95% confidence the absolute difference between the calculated and plants values were 1.37-5.7% for yield and -0.9-0.4 % for the concentrate ash content.
Journal of Mining Engineering
Iranian Society of Mining Engineering (IRSME)
1735-7616
8
v.
19
no.
2013
45
56
https://ijme.iranjournals.ir/article_4603_560ee4eb090ca996528297fb2eef680a.pdf
The airleakagerate oftunnelnumber oneTehran–Pardis tunnel with middle shaft pair byNumericalandanalyticalmethods
H
Rasouli
amir kabir university
author
H
Madini
Amirkabir University
author
text
article
2013
per
Generally the one middle shaft-longitudinal ventilation not used at sideway tunnels. Because, at the first half of thetunnel, direction of the moving of vehicles is same as the direction of ventilation and the piston effect will help ventilation, while at the second half, direction of moving vehicles is opposite to direction of ventilation, and the piston effect prevents ventilation. So, the second half of the tunnel is much polluted. Therefore the application of longitudinal ventilation with middle shaft in the sideway tunnels is implemented using twin middle shaft. So two devils are constructed in the center of the tunnel.The first one for pollutants exhaustion and the other for fresh air entrance. In this paper the possibility of using middle shaft in the ventilation system of Tehran-Pardis freeway number 1 tunnel is studied using analytical method. The tunnel’s air flow-rate is calculated using numerical method. So the 3- dimensional model of tunnel with 1550 length using FLUENT software is developed, and turbulence flow-rate is simulated using k-ε model. The results show that in some places, the local speed exceeds permitted speed. Therefore the proposed analytical method successively could be used for this purpose.
Journal of Mining Engineering
Iranian Society of Mining Engineering (IRSME)
1735-7616
8
v.
19
no.
2013
57
65
https://ijme.iranjournals.ir/article_5184_dcddf7370a62919ae0451ca6e5e69e26.pdf
Geochemical Modeling of Stream Sediment Samples by “Sample Catchment Basin" Approach
A.R
Mokhtari
Isfahan University of Technology
author
M
Abdolmaleki
Isfahan University of Technology
author
S
Akbar
Isfahan University of Technology
author
text
article
2013
per
Geochemical modeling by sample catchment basin approach has been exercised on stream sediment samples in central British Columbia, located between 124˚ - 124˚ 30΄ (W) and 52˚ 30΄- 52˚ 50΄ (N). In the study area 54 stream sediment samples are collected over 560 square kilometer and are chemically analyzed for 34 elements. Digital Elevation Model (DEM) and geographical position of the samples are used for sample catchment delineation and geological maps are digitized for further processing in UTM system. Background concentrations for elements of interest are calculated for each catchment by weighted average method and then residuals are calculated for the each catchment. In the next step, the positive residual are corrected for dilution effect. Due to multivariate nature of the geochemical data, multivariate techniques are employed in this study for more clear definition of anomalies related to gold mineralization. The results of this research have highlighted the "Baez" area in northeast in which occurrence of low sulphidation epithermal gold mineralization has been proven and this has verified the modeling and algorithm practiced in this research.
Journal of Mining Engineering
Iranian Society of Mining Engineering (IRSME)
1735-7616
8
v.
19
no.
2013
67
76
https://ijme.iranjournals.ir/article_5186_689b27a720e47fc69e370f847dafcdc2.pdf
Study the Capability of Zeolitic Tuffs of the Tarum Area as Natural Pozzolanic Materials for Industrial Cement Prodution
S
Aslani
Tehran University
author
A
Bahroodi
Tehran university
author
R
Esmaeilpour
Shahid Beheshti University
author
text
article
2013
per
The main purpose of this study is to investigate experimentally the quality of Pozzolanic prospects hosted in the Eocene pyroclatic succession of the Tarum magmatic range in the Zanjan province, northwest Iran. These prospects were discovered regionally in our previous work using Mineral Potential Mapping, MPM, as an integrated exploration method, consisting of the remote sensing analysis, geologic data, field observation and GIS modeling. During our previous study, some rock samples were collected for the detailed laboratory examinations. Regarding our plan, the samples have been analyzed using Petrography, XRD, XRF, physical tests and pozzolanic activity respectively. The careful petrography studies indicated five possible samples as suitable and promising targets. Further, the results of the physical tests suggest an appropriate conformity between the samples and international standards for evaluating the pozzolanic samples. Though, the samples could not meet the required standards for the pozzolanic activation test. Our further examination indicated that the combination of tuffs of the area from which the samples have been taken were generally andesitic. However, this study characterized that despite existence of some glass phase and also zeolite indications, the discovered pozzolanic prospects may not be suitable for industrial consume to produce the pozzolanic cement
Journal of Mining Engineering
Iranian Society of Mining Engineering (IRSME)
1735-7616
8
v.
19
no.
2013
77
85
https://ijme.iranjournals.ir/article_5192_3d330077df2570af76bc9f7938a26e4a.pdf
Comparison of various rock abrasivity testing methods
M.T
Hamzaban
Sahand University of Technology
author
H
Memarian
Tehran University
author
J
Rostami
Pennsylvania State University
author
text
article
2013
per
Presently, a large number of civil and mining openings are excavated by mechanized machines. Similarly, geotechnical and mining boreholes as well as oil and gas wells are drilled as a result of penetrating bits in rock. The efficiency of such devices requires a full understanding of geological and geotechnical conditions of the working environment. One of the most important parameters in estimating costs and efficiency of mechanized excavation is wear properties of rock. In this paper, different rock abrasivity testing methods are briefly reviewed Furthermore, by introduction of a simple rating system for various methods, their efficiency, in relation to evaluation of wear in disk cutters of TBMs, is estimated. Based on the results, the Cerchar test can be used as a low cost and relatively efficient method to evaluate abrasivity of rocks. However, investigations showed that Cerchar method, despite its relative high efficiency, has significant shortcomings in evaluating the abrasive capacity of rock.
Journal of Mining Engineering
Iranian Society of Mining Engineering (IRSME)
1735-7616
8
v.
19
no.
2013
87
106
https://ijme.iranjournals.ir/article_5512_90c898c6960e8579c412b4bfa9d7d28f.pdf
تحلیل دینامیکی تونل خط هفت متروی تهران با استفاده از روش اندرکنش زمین- سازه با استفاده از نرمافزار FLAC3D
M
Moradi
Emam Khomeini
author
M
Hoseini
Emam Khomeini
author
M
Sharifi Borojerdi
Mahab Ghods
author
text
article
2013
per
یکی از خطوط اصلی در شبکه ریلی تهران خط 7 مترو است که به صورت شرقی- غربی و شمالی- جنوبی است. طول خط هفت حدود 7/26 کیلومتر بوده و دارای 25 ایستگاه میباشد. هدف از این تحقیق تحلیل دینامیکی قطعه شرقی- غربی تونل میباشد که دارای طولی حدود 12 کیلومتر است. این تونل توسط یک دستگاه ماشین سپر فشار تعادلی حفاری و سگمنت گذاری خواهد شد. با توجه به دادههای موجود، محدوده مورد مطالعه از دیرباز در معرض رخدادهای زمینلرزهای متوسط تا شدید قرار داشته است. پس از تحلیل خطر زلزله در محدوده مورد بررسی، اطلاعات شتابنگاشت زنجیران بعنوان زلزله مبنا بصورت مقیاس شده، برای تحلیل دینامیکی انتخاب گردید. برای بررسی پایداری تونل سه مقطع در فاصله 2900، 4300 و 10600 از استادیوم تختی مدلسازی شد. مدلهای مورد نظر ابتدا تحت شرایط استاتیکی تحلیل شدند. پس از اطمینان از پایداری مدل ها، تحلیل دینامیکی تحت بارگذاری زلزله انتخاب شده انجام شد. پس از پایان تحلیل دینامیکی تنشهای برشی، نیروی محوری و ممان خمشی وارد شده بر سیستم نگهداری در سه نقطه اطراف تونل (سقف، کف و دیواره) توسط نرمافزار FLAC3D مورد بررسی قرار گرفتند. نتایج حاصل از تحلیلهای دینامیکی نشان میدهد تونل مورد نظر در برابر بارگذاری این زلزله پایدار میباشد.
Journal of Mining Engineering
Iranian Society of Mining Engineering (IRSME)
1735-7616
8
v.
19
no.
2013
107
118
https://ijme.iranjournals.ir/article_9839_a4d773fb1a416cd997eb0f9ae3393a80.pdf