roll crusher index

Roll Crushers Roll Crushers are designed to handle the primary, secondary and tertiary stage crushing of friable materials such as coal, salt, clay, bauxite, limestone and other minerals of similar characteristics in the mining, power generation and numerous other industries.

•Toothed roll crushers are much more versatile then smooth roll crusher, within the limitation that they cannot handle very hard solids. •Operated by compression, impact and shear. •The particle size feed to these machines may be given as great as 500 mm and the capacity is 500tons/hr. Crushers : Toothed Roll Crushers

The capacity of the single-roll crushers is a function of the roll gap, the roll length, and the speed, and ranges from about 30 tons/h (27 metric tons/h) for a 24-inch-long (61 cm) roll crushing to ¾ inch (2 cm), up to approximately 1500 tons/h (1360 metric tons/h) for an 84-inch-long (213 cm) roll crushing to pass 10 inches (25 cm).

power calculation of impact coal crusher based on bond. how to calculate mill bond or work index. How does crushing and screening machine work?, The work index of the ore was, being equivalent to the feed to the crusher and to calculate the work index on.

Roll Crusher • The reduction ratio and efficiency of roll crusher is very low. • The main advantage associated with roll crushers is small proportion of fines produced and more uniform size of product crushed, than the other crushers. • Low capacity • Low reduction ratio = F/P • Sensitive to top size 2/25/2015 6:58:05 AM 38 39.

Roll Crusher Roll crusher consists of two horizontally mounted rigid cylinders always moving in opposite direction but towards each other and downward. The ore particles to be crushed and nipped are pulled inward through the rolls by friction. The nipped particles are broken by compression.

Single Roll Crushers ... expressed as an index showing the relative hardness of that coal compared with a standard coal of 100 grindability. Height of Drop — Vertical, free fall distance from the lip of the feeding device to the inlet opening of an impactor or hammermill crusher.

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 …

roll crusher work index,Sizing acrushercan be done reliably calculated thanks to the Impact/CrushingWork Indexand the testwork research done by Fred Chester Bond and his 1952 paper. According to Bond's Third Theory of Comminution, thework/energy input is proportional to the new crack tip length created during particle breakage and equivalent to thework…

Roll Crushers are compression type crushers, and were once widely used in mining. They have, within the last 10 or so years, fallen into dis-favor among mining and processing companies. The probable reason is because the large mines require very large crushed product output with minimal cost, makes the roll crusher uncompetitive.

Roll Crusher. For a given reduction ratio, single-roll crushers are capable of reducing ROM material to a product with a top size in the range of 200–18 mm in a single pass, depending upon the top size of the feed coal. Double-roll crushers consist of …

Roll Crushers are compression type crushers, and were once widely used in mining.They have, within the last 10 or so years, fallen into dis-favor among mining and processing companies. The probable reason is because the large mines require very large crushed product output with minimal cost, makes the roll crusher uncompetitive.

Wi – Work index . ... Crushing rolls • Mainly used for extraction of juice from sugarcane • Two types – Smooth roll crusher – Serrated or toothed roll crusher Smooth roll crusher • Two heavy smooth faced roll rotating towards each other at same speed on parallel

Roll Crusher Work Index. Operating work index is not the specific energy consumption.Oct 24 2018 the work index can either be measured in the laboratory the bond ball mill work index determination is a common example or it can be calculated from the operating performance of.Read the rest ball mill work index calculation.

rock hardness crusher work index. How To Calculate Crusher Work Index, gravel, or rock dust crushers may be used to, work index test description comparison of ore hardness measurements. Live Chat »

P80 = 25400 x Oss x (0.04Wi + 0.40) P80 = 25400 x Css x 7Ecc x (0.02Wi + 0.70) / (7Ecc – 2Css) Where Oss = Open-side setting in inches Css = Closed-side settings in inches Ecc = Eccentric throw in inches P80 = Aperture through which …

4. ROLL CRUSHER Roll crushers are used for producing additional reductions in the sizes of stone after the output of a quarry has been subjected to one or more stages of prior crushing. Roll crushers have a theoretical MAXIMUM reduction ratio of 4:1.

Figure 1: Double roll crusher geometry 2.1.5 Thickness of the RollFigure 1 is the geometry of a double roll crusher with a spherical particle about to enter the crushing zone of a roll crusher and is about to be nipped [4], [5]. For rolls that have equal radii and length, tangents drawn at the point of contact of the particle