Dear Shastri B. I have procedrue for clinker grindability test in excel formate. If u insert the require values it will give the Bonds work index. If u r interested please give your email id so that i can mail u procedure as well as calculations. Following is my mail id. [email protected]. BLM. Page 1 of 3 1 2 3.
... Various factors affecting grindability can be divided into three main groups such as geological parameters (rock type, petrographic and mineral content, etc.), machine parameters (Bond or...
This paper examines potential relationships between UCS and Bond Work Index values (crushing, rod mill and ball mill). Data from 11 mines located around the world is analysed for correlations between UCS and various Wi values. Introduction
ABSTRACT clinker grinding was evaluated in a ball mill, varying the ball loading, mill speed and residence time, with the object of to relate by nomograms properties as: superficial area,...
Bond work index value of these components mixtures is greater than the Bond work in-dex of harder components, clinker. Oner (2000) have conducted a research of clinker and blast furnace slag mixture Bond Work Index in different mass propor-tions. He found out that these values are always lower than the Bond Index obtained
The Bond Work Index is one practical method. Regards, Ted. 7 posts Time Posted 10 years ago Arthur Harrisson says re Clinker grindability Some years ago I had some grindability testing done by Magotteaux. Two separate tests were performed, the first was the SGI test which assessed the number of
1885). Later work by Bond yielded an equation relating the energy needed to reduce a material from one characteristic size to a smaller size (each size expressed as the state where 80 percent of the particles are smaller than the characteristic size). Bond's work is notable because of its widespread adoption in the
Hosten and Avsar (1998) also demonstrated that the Bond ball mill work index of the mixture of clinker and trass is not the weighed-averaged values of the individual components. Indeed, they showed that the work index of the mixtures can be even higher than that of the hardest component.
energy consumed for clinker crushing (kWh/t) Wi Bond ball mill work index (kWh/t) Pc sieve size passing 80% of the clinker after crushing (μm) Fc sieve size passing 80% of the clinker before crushing (μm) A is an empirical coefficient, dependant on clinker and crusher properties
The Bond work index can be determined by many ways, some of them are as follows: with the traditional standard method in a (1) Bond-ball mill or in a (2) Hardgrove mill with the conversion of the Hardgrove method's result to Bond work index by an empirical formula, (3) with the more work-saving Karra algorithm (compared to the …
WiBM Bond Ball Mill Test Work Index (kWh/t) Wic Bond Impact Crushing Test Work Index (kWh/t) WioACT Actual Operating Bond Work Index determined from measurements on the circuit (kWh/t) WiRM Bond Rod Mill Test Work Index (kWh/t) WiSTD Standard Circuit Bond Work Index (expected or designed) used for circuit design. Specific energy …
The reason for this variation in ball mill work index is because the ore at Mt. Milligan has an intrinsic exponent of –0.45 in the 100 µm to 200 µm size range, not the –0.50 exponent empirically measured by F. Bond. The work index increase between 100 µm and 76 µm is due to a porphyritic grain size that causes a spike in energy
Bond work index (BWI) values of clinker and colemanite are 18.89 kWh/t and 12.33 kWh/t, respectively. EFFECT OF FERRITE PHASE ON THE FORMATION AND … Burnability index (BI) also reveals the burnability of raw meals [20].
Table of Bond Work Index by Minerals This Table of Ball Mill Bond Work Index of Minerals is a summary as tested on 'around the world sample'. You can find the …
Menéndez-Aguado et al. examined the possibility of determining the work index in a Denver laboratory batch ball mill with the same inner diameter as the Bond ball standard mill. The research was performed on the size class of −3.35 mm using samples of gypsum, celestite, feldspar, clinker, limestone, fluorite, and copper slag.
Menéndez-Aguado et al. examined the possibility of determining the work index in a Denver laboratory batch ball mill with the same inner diameter as the Bond …
A total of 700 ml of each blend were introduced in a 0.30 m cast iron drum (BICO Bond ball mill), with 285 steel balls weighting 44.5 lb together and a constant velocity of 100 rpm, as specified for the Bond work index determination.
Wi is the Bond work index kWh/short ton. Developed to predict energy requirements of 2.44m diameter, wet, closed circuit, ball mill at a fineness of either 65 mesh (220 µm) or 100 mesh(150 µm). Pre-crush feed to #6 (3.35 mm). Maintain 700g sample in test mill.
To measure grindability, Bond developed 'Bond's Work Index' (BWI), a 'test mill' and a testing procedure for WI. With the help of this we can work out power required to grind a material from a given feed size to a product of given fineness. Water Spray in Cement Mills.
An evaluation of Relo grinding media (RGM, Reuleaux tetrahedron-shaped bodies) performance versus standard grinding media (balls) was made through a series of grinding tests, including a slight modification of the standard Bond test procedure. Standard Bond tests showed a reduction in the Bond ball mill work index (wi) of the mineral sample …
FIGURE 8: ROD MILL/BALL MILL WORK INDEX RATIO v. UNCONFINED COMPRESSIVE STRENGTH 100 200 300 400 UCS (MPa) 0 0.5 1 1.5 2 WiRM/WiBM (metric) Siddall et al (1996) identified the ratio of Bond rod mill Work Index and ball mill Work Index as being indicative of an ore's compentency. Figure 8 plots this ratio versus …
3- STANDARD BOND TESTS The Bond's standard ball mill is used to determine the work index value of differ ent samples. The Bond work index is defined as the kilowatt-hours per short ton required to break from infinite size to a product size …
1. A grindability measurement made in a laboratory work index apparatus, such as a ball mill work index (WiBM) or a rod mill work index (WiRM) 3. An operating work index …
bond grinding of clinker smedegaard. 22 Sep 2017 This Table of Ball Mill Bond Work Index of Minerals is a summary as tested Cement clinker 150 131 135 148 150 150 136 777 180 Clinker vs cement It is manufactured by blending and intergrinding OPC clinker and granulated slag rubber cement is an adhesive known for a its fluid texture and …
The Bond ball mill work index is one of the most commonly used grindability tests in mining, and is often referred to as the Bond work index. The test is a 'locked-cycle' test …
The Bond work index is estimated by Equation (4). (4) Differences in grindability in this process are reflected only through differences in the size of the grinding product . The advantages of this procedure are the use of an ordinary laboratory mill with balls and a smaller mass and sample size than the standard Bond test.
The clinker–limestone mixtures were measured in dry mode. As the result of the grindability tests, the Bond work index of mixtures was determined the following ways: 1. Traditional Bond measurement (W i,B) 2. Conversion from the Hardgrove index (W i,B,HGI) 3. Karra algorithm (W i,B,K) 4.
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The standard methods to measure resistance to grinding are energy–size relationships, such as the Bond work index. Due to the fineness of industrial cement, the Bond work index does not model accurately blends of gypsum and clinker grinding for 100 μm cut sizes [ 5 ].
Jack Levin published a paper in the Journal of the SAIMM in 1989 describing a way to use a Bond ball mill grindability test apparatus to grind materials when the feed was already finer than 3.3 mm ...
