Reduction ratio is often measured by dividing the F80 by the P80. The F80 is the particle size where 80% of the feed material is smaller than that size. ... Hammermill Crushers often require a 1:1 ratio comparing horsepower to tph throughput. That ratio can grow to 3:1 for many applications, and even 5:1 when fine-grinding is required.

Ideally, the reduction ratio of a jaw crusher should be 6:1. There are different ways to calculate reduction ratio, but the best way is something called the P80 factor. The reduction ratio is then calculated …

The purpose of the primary crusher is to reduce the ROM ore to a size amenable for feeding the secondary crusher or the SAG mill grinding circuit. The ratio of reduction through a primary crusher can be up to about 8:1. Feed: ROM up to 1.5 m; Product: -300mm (for transport) to -200mm (for SAG mill) Feed Rate: 160 to 13,000 tph

Reduction Ratio in Mechanical operation is the ratio of diameter of feed to that of diameter of products. It gives the efficiency of separation of particles is calculated using Reduction Ratio = Feed Diameter / Product Diameter.To calculate Reduction Ratio, you need Feed Diameter (D f) & Product Diameter (D p).With our tool, you need to enter the respective …

Hammer Mill Reduction Ratio. Hammermills are capable of accomplishing: reductions very much greater than any other type of crushing equipment. It is possible, though not always economical, to make reductions as high as 20:1 in open circuit, and to double this performance in closed circuit. As in any other type of crusher, low reduction …

The reduction ratio is a very important factor. The reduction ratio refers to the ratio of the feed particle size to the product particle size in the crusher, which indicates the degree of material crushing, which directly affects the energy consumption and processing capacity of the crusher.

Jaw crusher is used as primary crusher, it's reduction ratio is usually 6:1. It uses compressive force to break the material, this mechanical pressure is achieved by the two jaws of the crusher. It is called a jaw crusher because it works the same was a human jaw does-food goes into your mouth and your bottom jaw pushes the food up against ...

R: Size reduction ratio. The ratio of the gape width to the near side jaw opening. This ratio may vary from 1/3 to 1/9, but is generally 1/3 for and 1/4 for secondary . θ: Nip angle. One of the most important parameters is the angle between the two jaws, which is …

The gyratory crushers crush to reduce the size by a maximum of about one-tenth its size. Usually, metallurgical operations require greater size reduction; hence, the products from the primary crushers are conveyed to secondary or cone crushers where further reduction in size takes place. Here, the maximum reduction ratio is about 8:1.

A cone crusher in a secondary crushing application will typically work with a 3.5:1 to 5:1 reduction ratio. Tertiary cone crusher configurations typically work with a reduction ratio of 2.5:1 to 4:1. The reduction ratio is defined as the ratio of the feed size for which 80 per cent will pass (F80), divided by the product size for which 80 per ...

The reduction of size of the material when it pass through a crusher is expressed as reduction ratio. The reduction ratio is the ratio of the crusher feed size to product size. The sizes are usually defined as the 80 % passing size of the cumulative size distribution. Types of crushers. Crushers are classified into three types based upon the ...

There are two main types of impact reduction, gravity and dynamic. ... Additionally, gyratory crushers have a higher crushing ratio (meaning that they can crush large material into smaller pieces), a larger feed opening, …

The reduction ratio is around 8:1 and as the product size is relatively small the feed size is limited to less than 50 ... This is followed by further size reduction in crushers located on the surface. When the run of mine product is conveyed directly from the mine to the crusher, the feed to the primary crusher passes under a magnet to remove ...

Rittinger's Law — The energy required for reduction in particle size of a solid is directly proportional to the increase in surface area. E = K R f c (1/L 2 – 1/L 1) Kick's Law — The amount of energy required to …

Cone Crushers deliver a 4:1 to 6:1 reduction ratio. A Cone Crusher with coarse-style liners would typically have a 6:1 reduction ratio, though reduction ratios of 8:1 may be possible in certain coarse crushing applications. Fine liner configurations typically have reduction ratios of 4:1 to 6:1.

The formula for calculating crusher reduction ratio: R r = G / S Where: R r = Crusher Reduction Ratio G = Gape Size S = Set Size Let's solve an example; Find the …

Impact crushers (rotary or hammer mills) have the capacity for high reduction ratios (up to 40:1), but are rarely applied to hard rock mines. Since they …

Gyratory crusher: feed diameter 0.75 to 1.5m; reduction ratio 5:1 to 10:1, usually 8:1; capacity 140 to 1000 kg/s; Mohs hardness <9. More suitable for slabby feeds than jaw crusher. [reduction by compression]. Roll crusher: feed diameter 1 cm: reduction ratio 5:1 to 10:1; capacity 0.3 to 20 kg/s: Mohs hardness < 7.5.

The reduction ratio is driven by the Crusher Close Side Setting. The actual minimum safe closed side setting of a crusher will vary somewhat, for any given crushing machine, depending upon the …

The reduction tonnage term is dependent on the properties of the material crushed so that for a given reduction ratio, the crusher capacity will vary for different materials. Taggart attempted to compensate for this by introducing the comparative reduction tonne, Q RC, which is related to the reduction tonne by the expression

SIZE REDUCTION BY CRUSHING METHODS Authors: A. Balasubramanian University of Mysore Abstract and Figures In the field of extractive metallurgy, mineral dressing is the process of separating...

On HSIs, Schmidt recommends that you don't exceed a reduction ratio of 12:1 to 18:1. Excessive reduction ratios reduce production rates and shorten crusher life. If you exceed what an HSI or cone crusher is designed to do within its configuration, you can expect to decrease the lifespan of certain components, because you are putting stresses ...

The Vertical Shaft Impactors or VSI Crusher are one type of impact crushers, which offer higher reduction ratios at a lower energy consumption. These impactors. can be considered as a 'stone pump' …

Jaw Crusher. This type of primary crusher is usually used for crushing shale to reduce it to a size suitable for handling. 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 ...

6 rowsCrusher Reduction Ratio I have mentioned the fact that, as the % of voids in the crushing chamber ...

VSI Crushers. Tertiary, Quaternary. Maximum Feed Size 8″ (203mm) Maximum Reduction Ratio 8:1. Maximum Production Rate 550 STPH (500 MTPH) — Materials: Benefication, Cement Clinker, Chips, Concrete Rock, Cubicle Products, Fractured Gravel, Man-Made Materials, Manufactured Sand, Precious Metals, Re-Crushing Shaping, Super Pave

Inversely, at a given reduction ratio, effective streamlining could increase the capacity by 30%. – The typical reduction ratio is bound to be between 6 and 8 and is similar that of jaw equipment. – Applying the crushing force by rolling the nut breaks flats and gives a product that is more "cubic" than the jaw crusher. –

The Smooth Roll Crusher plays a key role in bulk raw materials preparation, processing clays, coal fines, coke breeze and gypsum waste. Smooth roll crushers are used to particularly suitable for medium and fine grinding …

Primary crushers are designed so that the maximum size that can be presented to the crusher is approximately 80% of the gape. Jaw crushers are operated to produce a size reduction ratio between 4 :1 and 9 : 1. Gyratory crushers can produce size reduction ratios over a somewhat larger range of 3 :1 to 10 :1.

The primary contributor to poor crusher performance is crushing chamber selection. If the fit between the mantle and concave – in combination with the eccentric throw setting – is incorrect, then the optimal reduction ratio cannot be achieved. ... These are the two main causes of sub-optimal crushing performance, but losses in the reduction ...

Quad Roll Crushers are capable of achieving a 4:1 reduction ratio before feeding the crushed material to the secondary stage for an additional 4:1 reduction to make the final product. Since patenting the first Single Roll Crusher in 1894, McLanahan has become an expert and leader in the design and manufacture of Roll Crushers.

Cone Crushers are are well suited for hard to medium hard materials. They perform well in abrasive material with relatively low operating costs. In secondary applications, they typically provide a reduction ratio of 6:1, through 8:1 reduction ratios can be achieved with coarser applications. Horizontal Shaft Impactors

McLanahan's Universal Jaw Crusher produces more spec material at a lower cost per ton and ensures continuous crushing action with less abrasive wear. ... Using the F80 rule with the 32 x 54 Jaw Crusher, the 32" gape opening equals a 26" top sized feed, and with the 6:1 ratio of reduction, the discharge setting would be around 4". ...

The reduction ratio in the size of the impact crusher is from 20 to 1. The reduction ratio in the size of the impact crusher of the type of the vertical shaft is from 4-8 to 1. The reduction ratio in the size of the …

Calculate the gear reduction ratio by dividing the second gear's number of teeth by the first gear's number. Reduce the resulting fraction to make it easier to read. For instance 100/75 becomes 4/3. Reduce your calculated ratio further to an X:1 format, which is most commonly used by calculators and equations.