Introduction to sand and gravel crusher:

Sand and gravel crushers are mainly used for crushing materials in sand and gravel production lines, stone production lines, and crushed stone production lines. In these production lines, due to various factors such as different material characteristics, customer crushing fineness, and production capacity, our selection of crushers will also vary. In common sand and gravel production lines, stone production lines, and crushed stone production lines, two crushing processes are required. The first coarse crushing process usually uses a jaw crusher, while the second crushing process is used for fine crushing, and the selection varies depending on the material. The commonly used crushers areimpact crusherAnd we also recommend it to customers hereRoll CrusherAccording to customer feedback, the roller crusher has a slightly better crushing effect on materials such as river pebbles, pebbles, and crushed stones than the impact crusher.
Sand and gravel crusher is a type of roller crusher that uses the frictional force of the roller surface to bite the material into the crushing zone, causing it to withstand compression or splitting and be crushed. Mainly used for fine crushing of materials. When used for coarse crushing or when increasing the crushing ratio, teeth or grooves are often made on the roller surface to increase the splitting effect. This type of crusher is calleddouble-geared roller crusherWhen finer finished products, higher output, and larger crushing ratios are required, a four roll crusher is needed.

Sand and gravel crusherImage:

Belt driven spring roller crusher


1210 Large Coupling Spring Roll Crusher Picture (View more pictures)


Continuous transmission hydraulic roller crusher

Sand and gravel crusher video——Click to view more videos of roller crushers

Sand and gravel crushing test machine video _ Roll crusher（Click the video playback button to play the video）

Sand and gravel crusherDelivery site pictures（Click to view more shipping pictures of roller crushers）

Sichuan Yibin Mr. Chen's 1200 × 1000 sand and gravel crusher delivery site	Hubei Zhangzong 1200x1000 sand and gravel crusher delivery site
Large 1210 sand and gravel crusher shipment picture	400X400 sand and gravel crusher sent to Jinzhou, Liaoning

Sand and gravel crusherApplicable materials

cobble	calcite	quartz	marble
pebble	Sand and gravel materials	iron ore	limestone

River pebbles, calcite, quartz, marble, pebbles, bentonite, iron ore, bluestone, mountain stones, water slag, limestone, weathered sand, diabase, granite, basalt, etc.

Sand and gravel crusherWorking principle

Working principle diagram of double toothed roller crusher

This series of sand and gravel crushers (roller crushers) mainly consists of rollers, roller support bearings, clamping and adjusting devices, and driving devices. Adjustment of discharge particle size: A wedge-shaped or shim adjustment device is installed between the two rollers, and the top of the wedge-shaped device is equipped with an adjustment bolt. When the adjustment bolt pulls up the wedge block, the wedge block pushes the movable roller wheel away from the fixed wheel, that is, the gap between the two rollers increases, and the discharge particle size increases. When the wedge block is lowered, the gap between the two rollers of the movable roller wheel decreases under the action of the compression spring, and the discharge particle size decreases. The gasket device adjusts the particle size of the discharge by increasing or decreasing the number or thickness of gaskets. When adding gaskets, the gap between the two rollers increases, and when reducing gaskets, the gap between the two rollers decreases, resulting in a smaller discharge particle size. The driving mechanism is composed of two electric motors, which are transmitted to the pulley through a V-belt to drag the rollers and rotate them in opposite directions. When crushing materials, the materials are crushed through rollers from the feeding port, and the crushed products are discharged from under the chassis. For safety reasons, the transmission part should be equipped with a safety cover according to the actual situation.

Technical parameters of sand and gravel crusher

Note: The equipment model parameters are constantly being improved. If you cannot find the required model in the parameter table, you can contact us directly. Our technicians will configure the equipment that best suits your production needs and site requirements according to your requirements.

Sand and gravel crusheradvantage
1. The sand and gravel crusher (roller crusher) can fully utilize the production capacity of the grinding equipment, generally increasing the output by 30% -40% and reducing the total energy consumption by 20% -30%.
2. Compact structure, light weight, and small volume, the roller crusher can significantly save investment for grinding systems with the same production capacity requirements.
3. Simple structure, small space occupation, and convenient operation and maintenance.
4. Internally equipped with dust-proof plates, the sealing performance is good, avoiding the splashing of small materials after crushing, reducing dust, low working noise, and greatly improving the working environment.
5. The abrasive roller body has been re optimized and designed, and the equipment does not need to replace the grinding roller body for life, while the old type of roller machine needs to be disassembled and overhauled after one year of use, and the roller body needs to be replaced.
6. The sand and gravel crusher (roller crusher) is equipped with replaceable wear-resistant lining plates on the grinding rollers. The wear-resistant lining plates are made of advanced wear-resistant materials in China, which have the advantages of long service life, low damage, and easy maintenance. The continuous service life can reach more than one year. When the wear is severe, the hood can be removed for replacement. The maintenance volume is small and the cost is low, which is incomparable to any other type of crusher in China.
7. The sand and gravel crusher (roller crusher) is equipped with a safety protection device. When unexpected metal or iron parts enter the crushing chamber, the protection device will be activated, and the iron parts will leak out and the equipment will operate normally.
8. The abrasive roller gap of the sand and gravel crusher (roller crusher) can be adjusted arbitrarily between 1mm and 20mm. After adjusting the roller gap according to the requirements of the crushing particle size, the crushing particle size can be reliably controlled, and all particles are discharged from below the crushing chamber at the ideal particle size.
9. The structure is simple and reasonable, with low operating costs, smooth operation, high efficiency and energy saving, high crushing efficiency, and adjustable discharge particle size.
10. The sand and gravel crusher (roller crusher) operates on the principle of low-speed and high-pressure roller squeezing. The material falls vertically into the crushing chamber from the upper part of the crusher, and is crushed by the strong pressure generated between the two rollers. Most of the material has become powder, and the remaining small portion of granular material has already produced a large number of cracks inside. In the further crushing process, the energy consumption of grinding can be greatly reduced and the output can be increased.

Process flow of sand and gravel production line
The sand and gravel production line is used to produce artificial sand and gravel by mechanical means to meet the needs of key projects. It includes sand, aggregates, etc. The stone production line is divided into two categories: stone production line and sand production line. The equipment configuration of the production line varies depending on the classification. The main equipment includes vibrating feeders, jaw crushers, and impact crushers（Roll Crusher、four-roll crusher）Shake the sieve to obtain finished stones.
The large stones are uniformly fed into the jaw crusher by a vibrating feeder through the material bin for coarse crushing, and the coarse crushed stones are transported by a belt conveyor to the roller crusher for further crushing; The finely crushed stone is fed into a vibrating screen by a belt conveyor for screening, and several different sizes of stones are screened out. The stones that meet the particle size requirements are sent to the finished material pile by a finished product belt conveyor; Stones that do not meet the particle size requirements are returned to the roller crusher by the belt conveyor for further crushing, forming a closed loop with multiple cycles. The particle size of finished products can be combined and graded according to user needs, and auxiliary dust removal equipment can be equipped to protect the environment.

Process flow diagram of sand and gravel production line

Note: The crushing equipment used for the second fine crushing in the sand and gravel production line can be determined based on various factors such as customer material characteristics, crushing fineness, production capacity, etc. What we recommend here for everyone isimpact crusher、Roll Crusher、four-roll crusherThese three types of crushing equipment. Customers can choose according to their own sand and gravel production line needs.