The Roll Crusher usually saves head-room and weight, compact in structure and economical in first cost. lt is capable of large output AT SMALL RATIOS OF REDUCTION. For these reasons, the roll crusher lends itself to portable use or for fine crushing where ratio of reduction does not exceed 3 to 1. Corrugated rolls of different pitch and depth are used for greater RATIO OF REDUCTION and can take BIGGER FEED SIZE.
The double roll type of crusher pinches the aggregate only once. To avoid excessive wear upon the roll tyres, it is important that the pinch should be immediate, positive and without slippage. Consequently, larger feed sizes should be avoided, and the ratio of reduction should be kept within the 3 to 1 limit. Any attempt to exceed the permissible ratio of reduction c causes slippage which leads to increased wear upon the tyres, excessive spring action, oversize product and undue unkeep expense. Refer to table on back page for capacities and maximum size of feed recommended. SISCO CD-Series Roll Crushers successfully Crushes Aggregates, Limestone, lron Ore, Dolomite Coal etc.
SISCO Double Roll Crusher is a very substantially built machine. The longitudinal frame members are heavy steel joist reinforced with extra supports under each bearing cage and at the end. Cross- members are also heavy steel joist which form a rectangular main frame of exceptional strength and rigidity. Two heavy roll units, one fixed and one movable are mounted on this frame.
Each roll unit consists of a replaceable manganese steel roll shell, ground V-shaped on the inner periphery. This is mounted on a set of expanding conical rings, which function together as co-acting wedges. These are pulled together by heavy bolts so as to grip manganese shell firmly between them. Both the hubs of co-acting wedges are keyed to a heavy alloy steel shaft mounted on heavy duty self- aligning spherical double row roller bearing. The fixed roll drives the movable roll through a set of star gears. The heavy duty rollers haft bearings are enclosed in a steel bearing housing. The housing for the fixed rolls haft is bolted to the main crusher frame with the housing cage. Movable Rolls haft bearing housing along with slides are fitted in between the slide plates of the main frame and the top slide plates. Slides fitted with each bearing housing are fastened with high tensile counter shanked screws. The movable roll shaft bearing housing is floating and is placed between the gap adjusting shims on one side and spring assembly on the other side. These heavy duty springs assembled with high tensile studs absorb unwanted shocks and thus saves the equipment from damage. This also allows the passage of uncrushable material. Shims between top plate mounting stand and the movable shaft bearing housing fix the distance between rolls and thus determine the discharge opening
The movable roll assembly is supported by set bolt buffer plates stands and bolts. The other side of the movable roll assembly has provision for inserting adjusting shims. Once these set bolts are released then the adjusting shims can be either added or subtracted. Addition or subtraction of adjusting shims decreases or increases the gap between the rolls. Once the gap is fixed then theses set bolts are once again tightened.
The movable roll shaft is driven by the fixed roll shaft by extra heavy steel star-gears. The teeth are of sufficient length to give a wide range of discharge openings. These gears are enclosed in a dust and grease tight steel housing and run in grease.
The drive is given by any power source coupled with the flywheel of the equipment through V-belt or flat belt. An alloy steel driving gear is fitted on the above shaft. This drives a cast steel gear fitted on the fixed roll shaft. Both gears have machine cut helical teeth which provides excellent drive efficiency. These gears are enclosed in a dust and grease tight steel housing and run in grease
The capacities given are in tons per hour based on crushing granite weighing loose about 1.67 tons/Cubic metre. Capacities given are based on 2 metre per second peripheral speed of the roll shells. Wet, sticky feeds tend to reduce capacities, especially at close settings.
All feed must be down to maximum size specified in at least one dimension. No crusher, when set at any given discharge opening or spacing between rolls, will make a product all of which will pass a screen opening of the same dimensions as the given discharge opening. The amount of oversize will vary with the character of the rock. For close settings, all undersize materials should be removed from the feed.
This chapter deals with the designs and operation of different types of roll crushers. Two main types are indicated. The first type where the rolls are rotated in opposite direction with one roll spring loaded. Here, the mineral particles are nipped and crushed as they pass between rolls. In the second type, known as high pressure grinding roll (HPGR), the mineral sizes are reduced by compressive and interparticle pressure. The forces responsible for communication in each case are illustrated and the mathematical laws involved are explained, using solved examples. Commercial circuit diagrams of integrated plants are illustrated to help understand the theory and their practical applications.
Our range of Smooth Roll Crusher is manufactured at our ult-modern infrastructure unit that is laced with all the required machinery & tools. Also, we are using utmost quality material. Looking at the wide usage of these crushers we make them precisely by taking the help of the skilled professionals of industry chosen by us through a strict interview process. We always keep in mind the requirement & desires of our valued customers and provide them with the facility that can be easily be fitted and installed. These crushers are available at leading market price and can be customized as per the requirement.
Applied materials: coal, pebble, limestone, dolomite, granite, construction waste, pebbles, glass, cement clinker, basalt, iron ore, quartz stone, coal gangue, etc. Its advantages: high capacity, ability to handle wet, sticky feeds.
Roll crusher, as one of the most economical and practical crushers, is designed to handle the first and second crushing of friable minerals and stones such as coal, clay, coal gangue, limestone, slag, cement clinkers, and shale, etc.
According to the number of rollers, the FTM roll crushers can be divided into three types: single roll crusher, double-roll crusher, and multi-roll crusher. And the most common one is double-roll crusher.
Roll crusher is applied more widely than other crushers because of its small volume and cheap price. With the adjustable discharging system, it can be used flexibly in coarse and fine crushing processes of the industries such as cement, chemical engineering, electricity, mining, metallurgy, building materials, and others.
Roll crushers can adjust the wedge device between rollers to control the feed and discharge size of the machine. Also, it is equipped with a spring device to protect the crushing machine and avoid shutdown caused by overload and iron passing.
When the adjustable bolt pulls the wedge upward, the wedge pushes the movable roller away from the fixed wheel, then the gap between the two rollers becomes larger, and the discharge port becomes larger, and vice versa.
The gasket device adjusts the size of the discharge by increasing or decreasing the thickness of the gasket. When the gasket is added, the gap between the two rollers becomes larger, and vice versa.
The unique structure of rollers makes selective crushing of the roll crushing equipment. Since minerals fed are crushed along its internal friable crack, the finished products are uniform with the cube shape.
The minerals are crushed under the force of rollers and machine body, and ores smaller than the gap between roller and machine frame (of single roll crusher) or roller (of multi-roll crusher) will pass directly without repeated crushing.
With the supporting CPU, operators can control roll crushing machines and monitor gaps between rollers, and clean up the crushing cavity through the central control room, which will help save energy of 30% to 50%.
The main working parts of the roller crusher is the cylindrical rollers. The rollers are supported by the fixed and movable bearings, and they are relatively rotating which are driven by the motor. The materials are crushed by the friction of the rotating rollers, and the finished products are discharged from the gap of the rollers.
The spring is used to balance the pressure generated between the rolls. If there are non-crushed materials falling between the two rollers, the compression spring of bearings can be pushed to make a large gap so that non-crushed materials can be discharged immediately.
The quality of the crushers has a great impact on its price. The high-quality equipment will cost more in terms of workmanship, technology, materials, etc. Meanwhile, it will have a long service life, low failure rate, and better performance, and bring more profit to investors.
In 2019, Fote has exported a total of 39 roll crushers to India, Indonesia, Zimbabwe, Vietnam, South Africa, the United States, Pakistan, the Philippines and other countries, mainly for coal, bentonite, rare earth ore, limestone, aluminum, manganese and others.
Exports of mining machinery have been booming in recent years and Fote has already opened markets in Africa, Southeast Asia, etc. Fote Heavy Machinery has supported foreign customers with low-price and high-quality roll crushing equipment, which has been popular among the majority of customers.
In recent years, the Indonesian government has taken actions to improve its infrastructure and promote economic development. As a result, Indonesia's demand for crushers has increased significantly.
The roll crusher produced by Fote has fine finished products and the best effect on sand making for river pebble. Due to its good finished product size, low powder content and low price, it is widely favored by Indonesian customers.
Firstly, Fote Heavy Machinery is a professional manufacturer of roller crushers. In order to improve the company's comprehensive strength, Fote has introduced international first-class production lines on the basis of original techniques.
Secondly, FTM produces various types of crushing equipment that is suitable for crushing, sand making and milling hundreds of minerals, and ensures excellent quality, good performance and low price.
Thirdly, Fote has provided patient and prudential after-sales service and all-round consideration for customers, and actively created high-tech crushing equipment to take the leading position in the international market.
As a leading mining machinery manufacturer and exporter in China, we are always here to provide you with high quality products and better services. Welcome to contact us through one of the following ways or visit our company and factories.
Based on the high quality and complete after-sales service, our products have been exported to more than 120 countries and regions. Fote Machinery has been the choice of more than 200,000 customers.
The crushing capacity of roller crusher machine mainly depends on a pair of cylindrical rollers, which are installed horizontally on frame. Materials are crushed under the active force of rotational rollers. Therefore, we call it roller crusher.
1. Users can take the roller crusher to crush mineral ores with medium harness. Since the shape, size and array of teeth on roller surface can be changed with the property of raw material, either the secondary or tertiary crushing is easy to realize.
3. If the compressive strength of raw material is less than 160MPa, clients can take use of the smooth roll crusher. Double roll crusher has advantages like small discharging size, cheap price, strong wearable parts and reliable operation, etc.
1. If some non-crushing material enter into the space between rollers like drill bit, severe consequence will occur. Therefore, before crushing the material, smooth roller crusher should equip an device for absorbing iron and other matters.
2. If the double roll crusher works for a much longer period of time, the discharging size of finished products will be overly fine. At this time, users should adjust the discharging mouth or overhaul the whole machine.
The so-called double toothed roller crusher has discharger on its roller, which can clean tooth ace and roller surface. The applied material for teeth roller crusher are diverse. Double toothed roller crusher can crush limestone and rocks with compressive strength more than 200MPa. However, the most suitable materials for teeth roll crusher are clammy ones with water content between 25%-30% or hard material with mud inside. Since the teeth roll crusher has advantages like little dust, low noise and small floor space, etc, more and more people would like to throw olive branch to it.
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