A brief introduction to roll crusher
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.
With many improvements and upgrades, the FTM roll crusher has reached the international level and ranked among the most popular crushers in the mining industry.
Types of roll crushers
Types of roll crushers
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.
According to the surface of rolls, it can be divided into smooth roll crusher and toothed roll crusher. (The following roll crusher refers to “smooth roll crusher”.)
Applications of roll crushers
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.
Applications of roll crushers
Roll crushers especially have larger capacity, higher reduction efficiency and more excellent processing performance for the brittle minerals under the compressive strength of 160 MPa.
The squeezing principle used by roll crusher plays the greatest value when crushing coal, natural soda ash, glass, limestone, cement clinker, bentonite, and rare earth ore.
Especially in coal dressing process, roll crusher is very helpful to simplify the process and save the investment costs.
Advantages of roll crusher
High reduction rate and large capacity
Roll crushers have a theoretical MAXIMUM reduction ratio of 4:1. If a 2-inch particle is fed to the roll crusher the absolute smallest size one could expect from the crusher is 1/2 inch.
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.
How to adjust the discharge port of roll crusher
Tip for the adjustment of discharging size
A wedge or gasket adjustment device is equipped between the rollers. And there are adjustable bolts at the top of the wedge device.
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.
Low over-grinding rate and uniform particles
Good crushing performance of roll crushers
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.
Furthermore, the gap between rollers can be fixed tightly to guarantee sufficient crushing force.
Long service life of rollers
One of the most wearable parts in the roll crusher is the roller surface. Once the surface of rollers is damaged, it will seriously influence the fineness of the finished product.
Fote has used the high manganese steel as the raw material of roller surface, and the steel can crush hard rocks with little damage to expand rollers’ service life.
Rollers of high quality
Environmental and energy-saving
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%.
Dustproof device in roll crushers
What’s more, the FTM roll crushers are equipped with dustproof devices to prevent dust leakage efficiently and meet the requirements of environment protection.
Working principle of roll crusher
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.
Roll crusher working principle
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.
After the non-crushed materials are discharged, the spring can help recover the gap between the rollers to the original condition and the roll crusher continues to work.
3 factors affecting roll crusher price
The price of roll crushers is influenced by the following factors:
Quality assurance of FTM roll crushers
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.
Different equipment in different models has a different price. The larger roll crusher has a higher output and the more expensive price; the smaller one has a lower output and the cheaper price.
There are many factories of roller crushers. The differences in the scale of the factory, production processes, and management methods have created differences in the price of equipment.
Generally, factories with larger scales are more mature, and the crushing process is more advanced and the workmanship will effectively reduce waste.
At the same time, if they adopt independent research and development and direct sales form, the crusher will be cheaper than others.
Analysis of FTM roll crushers for sale in 2019
|Models||EXP to||Materials||Customer requirements|
|Feed size||Discharge size||Capacity|
|2PG1260||IN||Manganese ore||20mm||2-10mm||65 t/h|
|2PG0640||PK||Copper ore||20mm||4-8mm||15 t/h|
|2PG0740||ZA||Coal gangue||25mm||2-6mm||30 t/h|
|Customized||PH||Copper ore||25mm||2-6mm||90 t/h|
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.
After patient tracking of these customers by the aftersales team, more than a dozen enterprises have planned to cooperate with us in the near 2020.
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.
Customer case - Roll crusher sold to Indonesia
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.
River pebble crushing line with roll crusher
The following is one of the cases that the roller crusher for artificial sand was sold to Indonesia:
Project: river pebble crushing and screening production line
Project Location: Indonesia
Raw material: river pebble
Project output: 60 tons per hour
Raw material hardness: hard
Feed size: ≦30 mm
Production line type: fixed
Sand making: included
Sand washing: included
Several finished products: 3 sizes
Finished products’ specifications: 0-5 mm, 5-10 mm, 10-20 mm
Purchasing equipment: 2PG1560 roll crusher, YK vibrating screen, sand washing machine, etc.
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.
Roll crusher manufacturer-FTM
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.
Fote has continuously promoted the development in manufacturing technology, added personalized elements in the FTM roll crusher, and extended the performance and functionality.
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.
If you want to know more about the FTM roller crusher, please leave a message and we will get back to you as soon as possible.