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Open Access Article
1 - Assessment of the Acid Mine Drainage Potential of Processing Plant Tailings at the Sangan Iron Ore Complex
Ali Behnamfrad Esmail Khaphaje Rasool AlaeiBackground and Objective: Acid mine drainage (AMD) is the most significant environmental pollution problem associated with the mining activities. AMD is caused by the oxidation of sulfide minerals in the mine tailings that occurs when these materials are exposed to atmo MoreBackground and Objective: Acid mine drainage (AMD) is the most significant environmental pollution problem associated with the mining activities. AMD is caused by the oxidation of sulfide minerals in the mine tailings that occurs when these materials are exposed to atmospheric oxygen and water. Sangan processing plant annually produces 2.6 million tons of concentrate with iron content more than 66%. During this beneficiation approximately 1.3 Mt/a of tailing material containing 4% sulfur is produced and discarded to the tailings dam. The presence of sulfide minerals associated with water and oxygen in the tailing dam can generates AMD. The aim of this research is to evaluate the acid generation potential of the tailing material. Method: In order to predict the acid generation potential of the tailing material, samples were taken from the final tailing (i.e., the mixture of various tailing streams of the plant) and also separately from various tailing streams of the plant. Afterwards, the acid generation potential of the samples was determined by modified acid base accounting static tests. Results: The results indicated that the ratio of neutralization potential to acid potential for the final tailing is 2.04. Conclusion: This research showed that the tailing of Sangan iron ore processing plant is in the zone of uncertainty. Hence, additional kinetic testing must be performed for obtaining certainty about acid generation potential. Manuscript profile -
Open Access Article
2 - Investigation of environmental radioactivity in Iron ore of Shams Abad in Arak, Iran
Reza Pourimani Hamid Reza AzimiBackground and Objective: There are natural and artificial radionuclides in the environment, and the humans, wanted or unwanted, are exposed to nuclear radiation.Amount of radionuclides in the environment depends on soil type, rock and geographical situation. One of the MoreBackground and Objective: There are natural and artificial radionuclides in the environment, and the humans, wanted or unwanted, are exposed to nuclear radiation.Amount of radionuclides in the environment depends on soil type, rock and geographical situation. One of the ways for radionuclides transfer tohumans is application of inorganic material for production of necessary products. Thereforestudy of radioactivity of mines is very important. Method: In this research, 12 samples of Iron Ore of Shams Abad Iron mine have been studied. The samples were collected randomly according to color and identified type of composition in a mineralogy laboratory. The specific activities of natural radionuclides were determined using gamma ray spectrometry method, employing a high purity germanium detector (HPGe) model GCD30195 with 30% relative efficiency. Radium equivalent (Raeq), internal and external hazard indices (Hin and Hex), internal and external annual absorbed dose and absorbed dose rate for all samples were calculated. Conclusion: The activity concentration of 226Ra, 232Th and 40K in these samples varied from 9.39±0.53 to 271.70±1.84, <1.68 to 60.98±1.22 and 25.34±2.14 to 800.03±6.47 in Bqkg-1 respectively. Raeq, Hin, Hex and absorbed dose rate were calculated for all samples. The maximum Raeq was obtained to be 296.80 Bqkg-1 in limonite samples, which is lower than permissible values (370Bqkg-1). The absorbed dose rate in samples was calculated and varied from 6.56 to 136.81 in nGyh-1. Hin and Hex of samples were obtained to be in the range of 0.06 to 1.53 and 0.03 to 0.80 respectively. In all samples, except for limonite specimen, Hin and Hex are lower than 1 which shows no consequences for people health. Manuscript profile -
Open Access Article
3 - Assessment of Occupational Hazards with Safety Approach In Concentrative Unit of Sirjan Gol-E-Gohar Iron Company Using Job Safety Analysis
sudabe shahba Jafar Nouri Sima Barani Somayeh Shahba Seyedeh Zahra NourbakhshBackground and Objective: With advances in technology and the provision of care, numerous problems have emerged yet. On the one hand, these problems have led to environmental pollution and, on the other hand, have created risks of mining accidents and occupational disea MoreBackground and Objective: With advances in technology and the provision of care, numerous problems have emerged yet. On the one hand, these problems have led to environmental pollution and, on the other hand, have created risks of mining accidents and occupational diseases in the workplace. Since most of the activities in the concentrative unit of Sirjan Gol-E-Gohar Iron Company unit are considered working in a risk condition, it is essential to observe safety, and environmental and health issues and requirements to guarantee the security, health of the personnel and also to prevent environmental pollution. Method: In this study, using the JSA (Job Safety Analysis) method, first, the risks associated with each the job depending on the performed task were identified. Next, the employee exposure to risks, the probability of the risk of accidents, and the intensity of accident consequences are assessed. Finally, control solutions was proposed to eliminate or reduce any risks level. Findings: 12 hazardous jobs were determined, the associated risks were assessed, and control solutions were suggested. After risk assessment and calculating the risks level in the mentioned company, the results indicated that the liner maintenance technician with 18 risks ranked the first and the disc filters maintenance technician with 7 risk ranked as a person with the lowest risk. Conclusion: Training of the workers, increasing awareness of the risks, continuous monitoring of their work, improving the occupational safety and health management system are the main control solutions. Manuscript profile -
Open Access Article
4 - Optimization of the parameters affecting the removal of Acid Orange 7 using magnetite nanoparticles via response surface modeling method and Minitab 16 software
Ezatolah Mozafari Amin Saki Aref Faghihi Siavash FathiniaBackground and Objective: Textile and dyeing industry are the largest consumers of drinking water. Therefore, colored wastewaters that generated by the textile and dyeing industry, if discharged into the environment without treatment, can adversely affect aquatic ecosys MoreBackground and Objective: Textile and dyeing industry are the largest consumers of drinking water. Therefore, colored wastewaters that generated by the textile and dyeing industry, if discharged into the environment without treatment, can adversely affect aquatic ecosystems. In this study, magnetite nanoparticles are used to remove the dye (Acid Orange 7) from aqueous solution. Method: The magnetite nanoparticles were produced by a mechanical method using a planetary ball milling, and then the related physical properties were obtained and the chemical analysis was done by XRF, XRD and SEM images. The Heterogeneous Fenton process optimization was performance by response surface modeling with the help of Minitab16 software. The parameters of the initial concentration of the dye (5, 10, 15, 20 and 25 mg/L), the initial concentration of catalyst (0.4, 0.5, 0.6, 0.7 and 0.8 g/L), the initial concentration of hydrogen peroxide (5, 6.75, 8.50, 10.25, 12 mmol/L) and time of the process (8, 10, 24, 32 and 40 minutes) were selected as the factors involved in response surface modeling procedure. Findings: Dimensions of magnetite nanoparticles were determined as less than 50 nm. The amounts of magnetite (Fe3O4) and hematite (Fe2O3) were measured to be 21/68 and 31/22 respectively. Conditions for the initial concentration of the dye (X1), the initial concentration of catalyst (X2), the initial concentration of hydrogen peroxide (X3) and the process time (X4) were obtained as 10 mg / L, 0.7 g / L, 10.25mmol / L, 32 min respectively. ANOVA high correlation coefficients for the proposed model was also obtained (adjusted-R2=0.945 and R2=0.897). Conclusion: In optimal conditions, the removal efficiency of the dye (Acid Orange 7) by magnetite nanoparticles is 100%. Manuscript profile -
Open Access Article
5 - Dissolution Kinetic Evaluation of Manganese-rich Iron ore by Sulphuric acid Solution
Alafara Abdullahi Baba Musa John Saliu Daud Temitope Olaoluwa Taofiqat Omotayo Abu Rafiu Babatunde Bale Folahan Amoo Adekola -
Open Access Article
6 - Origin and development of Skarn-Forming fluids from the Band-e-Narges Skarn Iron ore, Central Iran
Maliheh Nazari Mohammad Lotfi Nematallah Rashidnejad omran Nima Nezafati -
Open Access Article
7 - Is skarnization the cause of mineralization? a case study, Sanandaj Sirjan zone, west Iran
Hossein Moinevaziri Hossein Azizi -
Open Access Article
8 - Paragenesis and geochornological studies of Asnawa Iron Ore by the isotope and mineral chemistry in Penjween Area, Zagros Suture Zone Kurdistan Region, NE Iraq
Kamal H. Karim Nabaz R.H. Aziz Al-Bidary Mayssa A.A.A The Asinawa iron ore is located about 3km to the southeast of Penjween town, Sulaimaniya Governorate, Kurdistan Region, Northeastern Iraq near the Iraq-Iran border. The exposed iron ore deposit is about 60 and 400m wide and long respectively. The present st More The Asinawa iron ore is located about 3km to the southeast of Penjween town, Sulaimaniya Governorate, Kurdistan Region, Northeastern Iraq near the Iraq-Iran border. The exposed iron ore deposit is about 60 and 400m wide and long respectively. The present study is the re-study of the geology and geochemistry of the Asnawan Iron ore deposit and concluded that the country rocks are consist of hornfels in which the original lamination or banding of the parent rocks (calc-silicate low grade metamorphic rocks) are preserved and inherited from its laminated sedimentary precursors. Moreover, the facies that is associated with host rocks is hornblende-hornfels facies with temperature range of 550-650 oC. This range is confirmed through thermo barometry. There are evidences of localized pyroxene-hornfels and sanidine hornfels facies too. Additionally, the detail of the different stages of the iron ore paragenesis is shown by discussion with the aid of suitable graphical drawing and geochemical variation diagrams. By these methods, the sedimentary stratigraphic unit of the parent rock (protolith) was found for the first time which consists of Qulqula Radiolarian Formation (Kermanshah Radiolarites in Iran). The bedded chert, limestone and calcareous shale is the main lithology of the latter formation and after burial and deformation, it is regionally metamorphosed to banded and lamiated calc-silicate rocks of green facies rocks. At a later stage, these rocks, remetamorphosed (polymetamorphism pattern) again to hornfels with concurrent changing to iron ore by basic iron rich hydrothermal solutions during Eocene (37-40Ma). This age is calculated using Ar39/Ar40 method of dating. Manuscript profile -
Open Access Article
9 - Classification and Separation of mine wastes in Chadurmalu iron ore mine in order to decrease in environmental impacts rate
Seyed Hamid Reza Mirahmadi Amir Hossien Bangian TabriziOne of environmental issues in open pit mining is to separate and send of mine wastes with different grade to different waste dumps. In this paper the mentioned subject of short-term production planning is presented. In short-term production planning the subjects of exa MoreOne of environmental issues in open pit mining is to separate and send of mine wastes with different grade to different waste dumps. In this paper the mentioned subject of short-term production planning is presented. In short-term production planning the subjects of exact contact boundaries between ore and waste, optimizing of extracting ore grade, the sequence of ore blocks’ exploitation and waste blocks’ removal are considered. Using of boreholes’ data of one or two higher working benches is one of the easiest ways of grade estimating in mining bench. For evaluating of presented model in this research, Chadormalu iron ore mine data is used as a case study. In the case study, the place of the bench in elevation of 1465 m is determined as the target bench of production planning. Average and least of iron grade were estimated respectively 57.08% and 53.62%. So, if only estimated grade in reserve estimating step is considered in short-term production planning more than 30% of the ore block’s reserve is transferred to the waste dump. So, the presented model waste dumps with different iron ore grade is planned for potentially future uses. Manuscript profile -
Open Access Article
10 - Investigation of wet spraying system to control dust pollution in mines (A case study )
Mahmoud Makkiabadi Sara Yaghoobi Mohammad Saleh Haj Mohammadi
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