Sizing a crusher can be done reliably calculated thanks to the Impact/Crushing Work Index and the testwork research done by Fred Chester Bond and his 1952 paper. According to Bond’s Third Theory of Comminution, the work/energy input is proportional to the new crack tip length created during particle breakage and equivalent to the work represented by the product the feed. A crude test
The Pendulum Tester / Bond Impact Crushing Work Index Tester. Working principle Crushing by impact. 76 mm maximum feed size. Test repetition: At least 10, preferably 20 test runs. Adjustable crushing angle Repeatable crushing results Safe two-hand operating buttons The Bond Crushing Work Index (CWI) describes the competency of the ore at larger particle sizes. It is used for the
Use of the Bond Work Index to size industrial grinding equipment was widely known. Bond also described its application for measuring grinding circuit efficiency. Bond Work Index efficiency has been widely used by industry, but until now without concise standard methods, or a formal guideline, for doing so. The Bond Efficiency SubCommittee of -
Bond’s law • The work required to form particles of size Dp from very large feed is proportional to the square root of the surface to volume ratio of the product • P/f = 0.3162 wi 1 1 √Dp √ Df . P Power in kW . f feed rate, t/hr . Dp 80% of the product passes through mesh of dia Dp, mm
The Bond Index Ball Mill / Rod Mill BT 100 XL is used in the planning of crushing plants. Retsch supplies a range of bond index testing equipment.
In the 1930s through early 1950s, Bond developed a new theory of comminution that introduced an index, called the 'Bond Work Index', which relates power consumption in crushing and grinding to the feed and product size distribution. His theory and index were introduced in a widely cited 1952 journal article. Bond called his theory the "third theory of comminution", counting those of Peter von Rittingerand Friedrich Kick as the first and second. This term and the terminology of "laws of comminution", as in "Rittinger's law", "
bond work index grinding equipment sizing. The Bond work index is obtained from laboratory crushing tests on the feed material.3.2.2 Bond crushing law and work index. + Chat Online » Inquiry Form. Mill (grinding) Wikipedia, the free encyclopedia. Read more
bauxite crushing bond work index rock crusher and. The Crusher Work Index in kWh/ton is a function of the material’s impact strength and is defined by an argillite type of rock, which has a work index of 16.5 bond crushing work index equipment.
1/1/2016· Bond’s crushing work index of gypsum. 3.4. A sample of granite passing a 7.5 cm square opening screen was suspended in a Bond’s pendulum test. The length of the pendulum was 413 mm and the mass of hammers is 13.6 kg each. The sample was completely crushed when the initial position of the pendulums made an angle of 30° with the vertical.
Technavio has been monitoring the crushing equipment market and it is poised to grow by $ 281.30 mn during 2020-2024, progressing at a CAGR of almost 3% during the forecast period.
Bauxite ore crusher is major crushing equipment in bonds crushing law and work index. Read more working index for crushing rocks, working index for crushing stones
Use of the Bond work index to size industrial grinding equipment is widely known. the data, Bond found there was an approximately fixed factor between the third law value for each of crushing, rod milling and ball milling, each over their...
FIGURE 1: BOND CRUSHING WORK INDEX v. UNCONFINED COMPRESSIVE STRENGTH 0 100 200 300 400 UCS, MPa 10 20 30 40 50 WiC (metric) The scatter of the points in Figure 1 indicates no correlation between crushing work index and UCS.
Bond crushing (impact) work index In general, the impact or crushing work indices (CWi) calculated from test work carried out on machines conforming to Bond’s Comparison between bond crushing energy and fracture energy of
The Bond work index (Bond, 1960) is based on Bond’s law, which states that the energy consumed is proportional to the 1.5 power of particle size rather than the square of Rittinger’s law. Accordingly, the energy consumed in reducing the particle size from x F to
The Bond work index is a measure of ore resistance to crushing and grinding and is determined using the Bond grindability test. Its value constitutes ore characteristic and is used for industrial
In conjunction with the Bond ball mill work index they can be used to accurately predict the overall specific energy requirements of circuits containing: • AG and SAG mills. • Ball mills • Rod mills • Crushers • High Pressure Grinding Rolls (HPGR)
• Material is fed between the plates and is reduced by crushing and shear • Mills with different patterns of grooves, corrugations on the plates perform a variety of operations • Overfeeding lowers grinders performance Increases heat generation during milling • Disks
Comminution is the reduction of solid materials from one average particle size to a smaller average particle size, by crushing, grinding, cutting, vibrating, or other processes. In geology, it occurs naturally during faulting in the upper part of the Earth's crust. In industry, it is an important unit operation in mineral processing, ceramics, electronics, and other fields, accomplished with