Request PDF | Effect of magnetite content on Bond work index and preconditioning: Case study on Chadormalu iron ore mine | Grinding is one of the most costly operations in the mechanical breaking ...
Comparison of the Different Ways of the Ball Bond Work Index Determining. When designing concentrating plants, the selection of the technological comminution scheme for beneficiation, the type, quantity and size of the equipment, the determination of optimal grinding regimes and the calculation of equipment loads are carried out by preliminary ...
This work index value obtained for the Gyel-Buruku columbite ore sample lies favourably within the work indexes of 3.94 - 10.81 kWh/ton for columbite minerals sighted in the literatures.
Determination of the breakage characteristics and preconditioning is important to increase the grinding efficiency. Investigations of the seismic, mechanical and breakage properties of iron oxides are very important parameters for investigating the rock fragmentation by blasting and comminution processes in iron ore mines.
In this paper, iron ore sample from the Chadormalu was investigated to determine some comminution properties. Chadormalu deposit is one of the largest iron ore mine in Iran, which is located in Yazd province. ... The objective of this study was to conduct a rapid determination of Bond work index by considering grinding kinetics of the particles ...
The Bond work index is a research methodology, which is widely used for the estimation of power required to grind the materials. Keeping in view the difficulty in determining this index, many alternatives to the standard method have been explored by the different researchers. The study is focused on comminuting behavior of limestone and calculation …
Bond Work Index was determined on the samples of dolomite, copper ore and quartzite. The samples were non-standard sizes. Dependence of changing parameters in Bond's formula was determined for these samples. And also, the procedure for the calculation of the Bond Work Index was suggested.
Bond work index of Birnin- Gwari iron ore in northern Nigeria is determined using modified Bond's method using 'reference ore'. Samples of iron ore were sourced using random method, ... The determination of work index using modified Bond's method can be compared to method of determining it by Berry and Bruce (1966). This method requires ...
Estimation of Specific Energy and Evaluation of Roadheader Performance Using Rock Properties and Bond Work Index. Specific energy (SE) is defined as the amount of work required to cut a unit volume of rock and is used to estimate the performance of excavation machines. Generally, the SE value is produced from….
The determination of work index using modified Bond's method can be compared to method of determining it by Berry and Bruce (1966). This method requires the use of a reference ore of
Alternative tests soon arose after Bond's proposal to avoid the need for the standard mill and time-consuming procedure. Therefore, papers dealing with this problem are numerous, aiming to discuss the validity of simpler and quicker methods to determine the Bond work index (wi).
The grindability of an ore in the process of mineral dressing can be determined by use of the Bond work index ( Wi ). This index is determined on a laboratory-scale using a Bond ball-mill and by simulating dry grinding in a closed circuit until the 250% circulating load has been obtained. This happens only after 7–10 grinding …
Understanding your ore's variation of work index by size is particularly useful for SAG mill troubleshooting and production forecasting.
The Bond Abrasion Test determines the Abrasion Index, which is used to determine steel media and liner wear in crushers, rod mills, and ball mills. Bond developed the following correlations based on the wear rate in pounds of metal wear/kWh of energy used in the comminution process. Determining rock abrasivity in the laboratory ref
The Bond work index test is a standard method of ore characterization used to assess the energy required for size reduction, and finds wide application in the design of comminution circuits [ 18, 20, 19, 20 ].
The determination of work index of Enyigba Lead Ore, Ebony State using the modified bond energy (Berry & Bruce) method was investigated. The test sample was obtained from Enyigba village in Ebonyi State. A reference material (granite) was sourced from Anguwan-Boro granite deposit, Sabo, Kaduna metropolis.
In this study, the mineralogical, chemical characterization and physical properties of Sudanese iron ore in west of Omdurman city were studied using microscopic investigations, X-ray Diffraction analysis (XRD), X-ray Fluorescence (XRF) analysis,
Parameters such as Bond work index and single-particle breakage are widely used to measure the energy requirements for size reduction in the analysis of ore properties. ...
The grinding experiments were carried out on four typical samples of iron, copper, manganese and lead–zinc ore with three test-sieves in specified time periods and aimed to shortening the procedure.
The Bond Work Index (Wi) is a common technique for the estimation of hardness and energy requirement for comminution using ball mills. However, this technique is time-consuming (close to 5 hours ...
Shown in the table below is typical Work Index, reflecting the different rock characteristics. It shows for example, that their is more energy required to crush Basalt then Iron Ore.
For raw materials and the pre-enriched concentrate, Bond work index and relative grindability were measured by Bond work index ball mill, providing technical support and theoretical guidance for increasing production and efficiency of the poor magnetite resources.
Determination of Shatter Index, Tumbler Index and Bond work Index of Limestone. Singh, Nitesh Kumar and Mohanta, M K and Rath, R K (2012) Determination of Shatter Index, Tumbler Index and Bond work Index of Limestone. Training Report (TR). CSIR -NML, Jamshedpur. (Unpublished)
Semantic Scholar extracted view of "A correlation between Vickers Hardness indentation values and the Bond Work Index for the grinding of brittle minerals" by M. Gent et al.
The work index values at Mt. Milligan, in Table 1, are reasonably constant across all the size classes (the ore's intrinsic exponent is similar to –1⁄2 across a wide size range), which mean that Bond-type models should be suitable for predicting the plant throughput.
The work carried out in this context focuses on three different samples of iron ore, viz., high silica high alumina, low silica high alumina, and low silica low alumina. The grinding process for all the three iron ores is carried out individually in Bond's ball mill and the total retention time taken by each iron ore sample is calculated.
The recommendations are given for selecting the Bond mill revolutions in the first milling cycle for apatite–nepheline, copper–nickel and iron ore for the sieve size 106 μm.
The value of the work index of Muro iron ore is within the limit of work index of iron ore quoted in literatures. Keywords: Bond's Equation, Grinding, Iron Ore, Marble, Size
The work index of the Bagega gold mineral was determined by equating the power consumed in the two indexes of the ore. It was found to be approximately 14.24Kwh/ton which is within the acceptable range of 10 - 15.14Kwh/ton indicated in literatures as standard work index range of gold.
A systematic investigation was carried out to predict Bond's work index using simple field measurable properties of rocks. Tests were conducted on Basalt, Slate and Granite using a laboratory scale ball mill and rock properties namely density, Protodyakonov's strength index and rebound hardness number were determined.
The Bond ball milling work index is regarded a grindability analysis used to determine the Bond work index of mineral samples, applying a closed cycle ball mill to mechanically activate the mineral particles.
The bonding index for iron ore, low grade and high grade limestone and pozzolan were calculated to be 14.75, 11.61, 11.87 and 10.80 Kwh/t, respectively.
