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When it comes to dealing with material of different shapes and sizes, there are many types of aggregate screens and crushers that can be used.
Cone crushers
Cone crushers for aggregates are popular crushing machines for producing gravel, stone chips, sand, and other vital quantities. The material being crushed is squeezed between a stationary outer cone and an inner moving cone-shaped mantle, which leads to an efficient reduction of the material. There are a few subtypes of cone crushers: the standard type for general use maximizing product size, the short-head type for higher ratios of final product size, and finally, the floating cone which is used in cases where the mantle needs to separate and then return.
Impact crushers
As the name suggests, aggregate impact crushers work by striking the stones in a specific direction. The stone is thrown vertically downwards towards the floor, creating a top-down crash. Floor impact crushers come in two main configurations: vertical and horizontal. The vertical impact floor crusher has a vertical shaft, whereas the horizontal one has a horizontal shaft. Though both of them are very efficient, the vertical impact crusher is much more efficient when producing sand from limestone and has better overall efficiency.
QJ341 mobile jaw crusher
With a 1200mm x 750mm jaw opening, the QJ341 is the largest mobile jaw crusher in the Q series. Optimized for high reduction and productivity, it is flexible enough for applications that include granite, cement, and demolition waste as well as other natural rocks.
Screening plants
Aggregate screening plants play a crucial role in the aggregate crushing process. They separate the aggregate material based on the desired shape and size and ensure a consistent supply of high-quality aggregate material while minimizing wastage.
The aggregate screens and crushers' specifications depend on various features, including capacity, configuration models, mobilization, screening area, materials, dimensions, and weights.
Aggregate crushers' specifications
Aggregate crushers' specifications include various models with different production capacities. The aggregate crusher can handle a wide variety of feed as it is designed to crush primary, secondary, and tertiary materials. Its settings may change to produce the desired size and shape. Different models of crushers have various crushing mechanisms. For instance, some may utilize a jaw to squeeze and break down material into smaller pieces, while others use impact forces to shatter material into fine particles. For example, cone crushers use a rotating cone within a stationary bowl to crush material. The dimensions and weight of an aggregate vary according to the models and types. For example, one might find an aggregate weighing 1,400 kilograms with dimensions of 1050 x 1430 x 1140 mm. Mobilization is another feature that makes some aggregate crushers portable. Aggregate crushers may be portable, intended for stationary installation in a fixed facility.
Aggregate screens' specifications
The deck configuration is a significant specification for aggregate screens. The screens are available in a range of deck configurations, including single deck, double deck, and triple decks. Their screening areas differ according to the deck configurations. For example, an aggregate with a double deck may have a screening area of about 14.88 square meters. Aggregate screens may also be available with varying capacities. The specific capacity will depend on the feed material's characteristics, the screen's design, and the operating conditions. The dimensions and weight of an aggregate screen vary according to the model. For instance, a certain aggregate screen might have dimensions of 2.4 x 5.2 m and weigh 10,000 kg.
Maintenance ensures that the equipment aggregate performs well, has a long lifespan, and is safe to operate. Performing routine crusher maintenance is vital. It helps to ensure maximum uptime. Manufacturers advise checking for cracks, especially around welded areas or any other places that may be prone to breaking. Another maintenance tip is to check oil levels and make sure there are no air leaks. This helps to maintain proper lubrication of bearings and other aggregate screens and crushers moving parts. It's also vital to keep the equipment aggregate clean. Materials buildup can cause overheating and other performance issues. Aggregate screens cleaning should be done correctly to avoid damage. Manufacturers advise following the manufacturer's cleaning instructions manuals. It's also important to have safety precautions when handling the aggregate screens and crushers. Safety manuals provide crucial information on handling tips and equipment safeguards.
Mining and Mineral Processing :
In the mining industry, aggregate screens and crushers are primarily used for the processing of minerals. After minerals like diamonds, iron ore, and copper are mined, they need to be screened and crushed to separate valuable components and reduce their size for further processing.
Construction and Demolition Recycling:
Aggregate screens and crushers also play a valuable role in recycling construction and demolition waste. For instance, the concrete and bricks from building renovations, demolitions, or construction projects can be crushed and screened for reuse as building materials. This not only alleviates landfill pressure but also reduces the demand for virgin material extraction.
Asphalt Recycling:
Aggregate screens and crushers are critical in old asphalt processing. Reclaimed asphalt pavement (RAP) is extracted from road repairs or demolition projects and then screened and crushed to recover reusable aggregates. These aggregates can be blended into new asphalt mixtures to reduce the use of new asphalt binder and aggregates.
Sand Production:
Aggregate screens and crushers are essential equipment for manufacturing sand. By crushing stone or construction waste, they produce sand used in construction, concrete production, and other applications. The online real-time screening technology ensures that the sand meets the quality requirements and can be put into use immediately.
Soil Remediation:
Aggregate screens and crushers can also be used to treat contaminated soil. The contaminated soil is screened and crushed to separate pollutants, such as chemical containers or debris. This process reduces the volume of contaminated material and prevents pollutants from spreading further.
Production of Lightweight Aggregate:
Such as aggregated expanded clay or shale, which are produced through high-temperature calcination. Aggregate screens and crushers play a crucial role in their size screening and classification to ensure that these aggregates meet the quality and grading requirements specified for construction and concrete use.
Choosing the right aggregate screens and crushers can have a significant impact on operation, cost, yield, and product quality. Therefore, it is important to take the following factors into consideration when selecting these machines.
Material characteristics analysis
When choosing an aggregate crusher, it is important to analyze the material characteristics first, such as hardness, humidity, corrosiveness, shape, etc. Different material characteristics are suitable for different types of crushers. For example, hammer crushers are more suitable for crushing materials with higher humidity.
Production capacity requirements
Production capacity refers to the amount of aggregate materials processed per unit of time. Users need to determine the required production capacity according to their own production lines and operating conditions. Selecting an aggregate crusher with a suitable production capacity can ensure that it meets production needs and avoids excessive energy consumption.
Space limitations
Whether it is an aggregate vibrating screen or an aggregate crusher, the footprint of the equipment needs to be considered. The size and configuration of the equipment need to fit within the production site to ensure proper installation and operation.
Power requirements and sources
Whether it is an aggregate vibrating screen or an aggregate crusher, the power requirement and power source need to be considered. Users need to ensure that the power of the equipment can meet the operating needs, and the power source can provide stable electricity.
Environmental factors
Equipment selection should consider the environmental impact. This includes choosing dust- Aggregate screens and crusher suppliers may wish to consider the types of aggregates used in different applications. For example, a fine aggregate screen is usually used to get sand. In contrast, coarse screens are designed to separate larger particles such as gravel and crushed stone. Also, the screening process varies according to the material being screened. Some processes require the screening of unwanted material or oversize material to be recycled back into the production process. Others may require the screening of different grades of aggregate to be stockpiled. Screeners used to separate marine aggregates from organic matter in the sea, for example, are likely to handle material differently from sand in a desert area.
Q: What types of aggregate screens are there?
A: There are many screeners for aggregates, but the three most common types used in the industry are the circular aggregate screen separator, vibrating aggregate screening separator, and the trommel aggregate screen separator.
Q: What do aggregate crushers do?
A: Aggregate crushers break large rocks and stone into smaller parts to make up the aggregate materials used in construction projects.
Q: Why are aggregate screens and crushers important?
A: The construction industry heavily relies on aggregate materials like sand, gravel, and crushed stone. Screens and crushers help manage the supply and production of these materials, ensuring a steady source for construction projects. If there are any delays in the supply of aggregate materials, the cost of construction projects will increase.
Q: What is the function of the aggregate screen?
A: The aggregate screen's function is to sort and separate various materials based on their size. Different types of screens, such as vibrating screens, trommel screens, and deck screens, are made to facilitate the screening process.
