Dec 15, 2013 In some samples, the iron oxides are disseminated within the feldspars and nepheline syenite crystals, or in cracks and fissures within the feldspars . The Bond Work Index, which is an indiion of the grindability of the ore, was calculated to be 26.2 kWh/t and 18.5 kWh/t for dry and wet grinding of the ore,
Get PriceMar 17, 2017 The test is designed to give a reasonable indiion of the grinding work index of an ore material relative to one or more known standards. Grinding may be performed wet or dry, although, in the base metal, uranium and iron ore industries, wet methods are usually preferred for a number of reasons, chief
Get Pricefrom the ore. Since all iron ore deposits have unique mineralogy, the beneficiation process is specific to each deposit. Separation of certain minerals can be It requires 15 kg of minus ½ mesh material that is preferably prepared at the testing facility. The Bond Rod Work. Index has been widely used for rod mill sizing.
Get PriceWork on the grind ability of coal by Marland et al., 200030, indied that reductions in work reduction in the work index of the massive copper ore. an iron ore. Iron ore material was preheated for different time at 1000W in a multi- mode microwave oven. Comparative bond rod mill work index was used to determine the
Get PriceCopper-Gold in Indonesia, CVRD Iron Ore in. Brazil, Kudremukh Iron Ore . Bond work index testing conducted in these test programs confirmed the sample was relatively hard and comparable to many mineral ores. The sample was pre- screened using a. “Russel” vibrating Ball mill grindability tests: Bond ball mill locked
Get Pricewas ground in various grinding times according to the Bond Ball mill approach to specify the work index values. Based on Keywords: iron ore, chadormalu, work index, comminution properties, selection function, energy efficiency. 1. Introduction. 1.1. grindability characteristics of lateritic and karst bauxites, by means of
Get PriceThe optimum ball milling speed of the ore was found to be 82.9% of the critical mill speed. This work established a rational approach in the choice of grinding speed. The effects of the .. Deniz, V., and Ozdag, H., ―A New Approach to Bond Grindability and Work Index: Dynamic Elastic Parameters‖, Minerals. Engineering
Get Pricesimilar size classes. The commonly used grindability tests included in the database are the Bond work indices for ball ta; SAG grindability index, SGI or SPI™; and other values such as Mib and point load index. Canada. Segura, J . and Tavares, L.M. (2014) Comparing comminution routes for a Brazilian iron ore using.
Get PriceLevin (1989) indied that the standard Bond test should be used for coarse materials (+3.3mm) and suggested a comparative method for fine materials. Olatunji and Durojaye (2010) adopted the comparative grindability test for the determination of the work index of Birnin-Gwari iron ore in Nigeria. A reference ore is.
Get Price2.1.3 Work Index: Work index is defined as the gross energy required in kilowatt- hours per ton of feed needed to reduce a very large feed to such a size that 80% . iron ores. The equations obtained are in accordance with the experimental observations. From the above expressions it is clear that the factor, which affects the
Get Price2. Relative working index of grindability of andesite specimens subjected to microwave pre-treatment. Time of microwave heating. [min]. Relative Work Index grinding 20 min. 0. 1. 1. 0.97. 3 The separation of weakly magnetic iron ores is limited by the magnitude of magnetic force that can be developed in high intensity
Get PriceAs reported, generation of fines was minimized, which improved comminution characteristics and grindability of rock. Ref. . Due to change in mineralogy, there is 70% reduction of work index of MC ore whereas 65% reduction of work index of MCZ ore after 90 s of exposure to microwave followed by quenching. Download
Get Pricesieving breakage, standard Bond work index grindability and single particle drop weight comminution tests. The results of the sieving with both the microwave treated copper ores, on the other hand, suggested no significant improvements in grindability. The iron sulphides and copper-iron sulphides. Copper occures as
Get PriceJul 31, 2015 a new approach toward estimating the Bond ball mill work index (BBWI) by applying a series of kinetic grinding tests with Bond Keywords: work index, Bond method, kinetic grinding test, grindability, ball mill. Introduction Thirteen samples of different ores and materials such as copper, iron and clinkers.
Get PriceMay 19, 2015 Setting up a geometallurgical program for an ore deposit requires extensive test work, particularly SPI grindability test. -. X. X. 10. 2. GeM comminution index 6 . -. X. X. 5. 1. Notes: 1 per specimen; 2 Non-destructive method and is limited to sponsors; 3 based on the JK drop weight test;. 4 Mainly for
Get PriceFor the iron ore exploration and mining industries, SGS Minerals Services using the Bond and autogenous grindability tests. All data is analyzed and related to previous testing results. We compliment the JKTech models with mass- balancing, using the Bilmat SPI (Sag Power Index) Test. •. Bond Ball Mill Grindability Test.
Get PriceScanning electron microscope (SEM) photo- micrographs verified fracturing along grain boundaries and throughout the gangue matrix. Standard Bond grindability tests showed that microwave heating reduced the work index of iron ores by 9.9 to 23.7 pct. Preliminary studies using a continuous feed belt in a microwave
Get PriceDec 19, 2017 Request (PDF) | Fast test method for | This paper presents briefly the standard grindability testing methods such as Bond- and Hardgrove process. Then the study shows two relatively fast alternative way for the determination of specific grinding work and Bond work index of brittle materials. The standard
Get Pricetexture. 2. Investigate the effects of mineralogical properties of ore samples based on industrial case studies, e.g. oxide ores (case of Malmberget and Kiruna iron ores) and sulphide ores, including measurements of the Bond work index by using a single pass grindability test. 3. Unify mineralogical and comminution models
Get Priceby Andes Iron SpA. Prior to the PFS,. SRK managed a scoping study for the project, with the metallurgical testwork supervised out of SRK''s UK office. A key initial .. Ekaterina works in. SRK''s Moscow office and has 6 years of professional experience. During her career, she has tested ore for grindability and other process.
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