The rapid development of urbanization has resulted in the accumulation of a large amount of waste concrete, which not only occupies land resources but also pollutes the air and the environment. Therefore, the recycling of waste concrete has become an important issue that the government needs to solve.
Abandoned concrete blocks are high-quality concrete aggregates which have many advantages. For example, after the buildings are dismantled, the high-quality concrete blocks and silt after crushing and screening can be used as recycled coarse and fine aggregates for concrete. The fine powder can be directly used as the raw material of cement. The concrete prepared from recycled cement and recycled aggregate can enter the next cycle, which realizes zero waste discharge throughout the whole cycle.
Concrete, cement and other wastes in construction waste can be used as building aggregates and recycled brick raw materials after being reasonably crushed, screened and crushed. And the main equipment used for crushing concrete can be divided into two types: traditional fixed crusher and mobile concrete crusher, among which small crushing equipment is favored by users.
Although the compressive strength and hardness of concrete are not high, due to the porosity and the formation type, the concrete has good toughness and can buffer the crushing force, which causes low crushing efficiency. So, what kind of crusher should be selected for concrete crushing? In the process of crushing waste concrete, according to the working principle of more crushing and less grinding, it is necessary to carefully configure the concrete crusher equipment.
Jaw Crusher, also known as concrete crusher, is usually used as the primary equipment for concrete crushing. It is also suitable for metallurgy, mining, construction, chemical, water conservancy and railway sectors, and used as a device for fine and medium crushing of ores and rocks with compressive strength below 250 Mpa.
In recent years, the small jaw crusher has been favored by foreign users because of its small size, easy transportation and installation, low price, and fast profit. The models like PE-150250, PE-200350 and PE-400600 have become the best choice for customers to crush concrete.
After the rough breaking, steel and iron equipment are added to remove the steel bars and iron blocks in the waste concrete, which will eliminate the damage of steel bars and iron blocks to the equipment without affecting the production. Generally, the impact crusher, the fine crushing jaw crusher or the cone crusher is used as the secondary crushing to crush the material to less than 2 cm, and the selected granularity can be basically achieved.
For smaller discharge sizes, a three-stage crusher can be used, for example, the fine crushing crusher or the roller crusher is used to further crush the ore to less than 10 mm. In the actual production, the suitable crusher can be selected according to the size of the concrete block. It can be combined in single or multi-machine operations, both of which have the characteristics of simple operation, strong controllability and high production efficiency.
In the international environment of the crusher industry, besides the traditional jaw crusher, high-efficiency and environmentally-friendly construction concrete crusher will be the trend of future development.
In view of the characteristics of concrete waste, Henan HXJQ Machinery designed a concrete crushing equipment-mobile concrete crusher. The waste concrete after crushing can be used for reinforcing the foundation, producing bricks, cement, etc, not only achieving its values but also solving the issue of land and environment problems, which can be described as two-fold.
The mobile concrete processing station produced by HXJQ Machinery adopts multi-stage combination mode, which includes jaw crusher, impact crusher, cone crusher and vibrating screening equipment, conveyor belt, etc. Generally, the concrete crushing station is composed of a concrete crusher (sand making machine), a screening machine, a feeder, a conveyor belt, a steel frame, a drive system, an electric control system, a motor unit and the like.
The concrete material is sent into the crusher by the feeding equipment, and the crushing machine converts the large concrete into gravel. The finished product which meets the standard is transported by the conveyor belt to the stacking place, and the products which don't meet the standard will be transported by the other conveying belt to the crusher again until it is qualified.
The integrated vibrating screen, feeder and the under-belt conveyor, the vibrating screen and the crusher integrated into the vehicle can reach any position on the working site under any terrain conditions. Thus the mobile concrete crusher has many advantages like reasonable material matching, smooth flow, reliable operation, convenient operation, high efficiency and energy saving.
1. According to the driving way, it is divided into tire type and crawler type: the tire type concrete crushing and sorting machine needs semi-trailer traction to run, while the crawler type can be remotely operated with buttons. Relatively speaking, the latter is more intelligent and the price is more expensive.
2. According to the function, it is divided into crushing type and sand making type: the concrete crushing and screening machine includes a combination of crushing equipment such as jaw crusher, cone crusher and impact crusher. The sand making type is mainly equipped with sand making machine and hammer sanding machine.
The mobile crushing station can prevent and control environmental pollution, improve the ecological environment, and protect natural resources. The size and model can be designed according to the different production needs of users. According to the statistics of the HXJQ machinery, the small mobile crusher is chosen by more foreign users because of its reasonable price, high quality, convenient transition, operation and maintenance.
A project introduction of construction concrete treatment: in October 2018, a customer found HXJQ, and hoped that we could provide him with the complete equipment for breaking construction waste. Our technical manager quickly contacted him and learned that the customer had a large amount of construction waste to be disposed of.
From the perspective of economic foundation and practical operation, the technical manager recommended the fixed crushing station to him and designed a complete set of equipment suitable for his actual needs. In the end, the customer introduced the PE-400600 jaw crusher and PF-1010 impact crusher produced by our company to break the concrete waste. The finished sandstone is used for brick making, roadbed materials, etc., and the separated steel is recycled.
The pretreated concrete with reinforcing steel is sent to the jaw crusher for initial breakage by the conveyor belt, then effectively separated by the iron remover, and sent to the impact crusher for fine crushing. The crushed material is sieved by the vibrating screen. The finished material is output by the conveyor. If the material does not meet the specifications, it will continue to return to the impact crusher and break again.
The development and utilization of waste concrete as a recycled material solves the problems of a large amount of waste concrete treatment and the resulting deterioration of the ecological environment; on the other hand, it can reduce the consumption of natural aggregates in the construction industry, thereby reducing exploitation of the natural sand and gravel, which has fundamentally solved the problem of the depletion of natural aggregates and the destruction of the ecological environment because of the lack of sandstones.
Under this circumstance, the crusher plays an irreplaceable role in the recycling of materials. Whether it is the traditional fixed crusher or the latest mobile crusher, both of them have their own advantages. As long as the size of the stone produced by the equipment can meet the standard, it is a good crusher.
Black stone chips are the most widely used aggregate in the quarry industry. Because of huge demands of black stone chips for construction, cement making, garden decoration, driveway, etc., aggregate suppliers need to produce different sizes of materials by crushing equipment.
In the black stone production line, the large stones are evenly sent to the jaw crusher by the vibrating feeder for coarse crushing. The oversized stones would be back to the jaw crusher by the belt conveyor for further crushing until it can be discharged.
Horizontal impact crusher crushers are often used for the secondary and tertiary crushing process. It can reduce material which is smaller than that of jaw crusher, and the maximum discharging size of the impact crusher is less than 30mm.
When materials with a compressive strength of less than 150MPa, the impact crusher maximum feed is 400mm, and when the processing compressive strength is greater than 150MPa, the maximum feed is 200mm.
The impact crusher uses the bleaker plate on the high-speed rotating rotor to produce high-speed impact. By that impact force, the black stone would be crushed first, and then being thrown to the other breaker plate for another crushing process. After rock-on-steel (ROS) and rock-on-rock (ROR) crushing process, the final product will be discharged for the outlet port.
The cone crusher is especially suitable for materials which is not abrasive, and the product moisture content is less than15%. When the cone crusher is working, the motor drives the rotor to rotate at a high speed, which impacts and reduces the materials into very smaller sizes.
The vibrating feeder has simple structure, stable vibration, uniform feeding, good continuous performance, and adjustable excitation force. It is a necessary machine to send the raw black stone into the next crushers.
The impact crusher is used in the fine crushing. The aggregate crushed by jaw crusher enters the pre-screening screener. Among them, the aggregates meeting the specifications of 12-16mm enter the finished aggregate pile.
The last step is to get 5-6mm black stone chips. Cone crushers mainly uses the "laminated crushing" principle to crushing the material with two stages, then you can get cubic, good shape products.
This his highly automatic production line which greatly reduces the manual cost and enhance safety of operation. Besides, the system can automatically make fault diagnosis and corresponding measures, and send out alarm information for the operator to solve.
The company has nearly 40 years of R&D experience. We promise that every detail in the production process will be completed with high quality, so that our products can help customers efficiently produce the best aggregate products.
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.
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Is your cement clumped up due to moisture, temperature changes, and long storage times? Integrate our bulk cement crusher to your process that breaks clumps down to your required specs. Ensure seamless mixing and transport through the rest of your process by declumping your material to a uniform powder size.
Call us now at763-427-9991to talk to a process expert, give us details on your material, and arrange to send it in for free testing. Youll get results, a video, and a recommendation for the best equipment to suit your process.
Many industrial cement manufacturers run into problems with moisture getting into the cement and causing clumping. Lumps can form in cement during transport and storage. Temperature and moisture fluctuations can cause Portland cement to clump up. Long storage cycles can lead to the cement sticking to silo walls. There are many causes of clumping and material agglomeration, but they all lead to one thing: clumps.
Portland cement that sticks to silo walls can unstick during processing and enter the line in clumps. These clumps can sometimes be as big as 8 inches in diameter. Cement clumps get stuck during conveying, they dont mix properly, and can damage equipment further down in the process. Clumps end up requiring special attention during processing to prevent equipment damage.
Bulk cement crushing ensures your product mixes thoroughly and evenly by breaking up clumps. Our engineers are experts in designing the material crusher that fits seamlessly within your process. Well design a crusher that breaks the clumps down as small as you need them, working with the batch sizes, textures, and processing times that youre already accustomed to.
It depends on your process, your product, and your material. Our most effective cement crusher is our Dual Rotor Crusher, and when paired with a Gravity Screener and Conveyor it can make your process extremely efficient. The crusher breaks down oversized lumps and minimizes backups in your loading spouts while filling trucks or railcars. We understand that you only have a short period of time to prep cement before transferring it to your ready-mix trucks waiting to transport your product to job sites. Lets design a crusher together that integrates seamlessly into your system to keep material moving instead of clogging up the production line.
We start by having a phone consultation to discuss the material youre working with and what kind of bulk powder crusher will be most effective. Well ask questions like your target lump size and what will happen with the cement after it is crushed.
After the initial phone consultation, you can send us your product for testing in our test lab. When you send your cement to our test lab, well test it on our bulk powder crushers with your actual product to ensure it works perfectly with your specific material. Youll get a custom-built crusher for your exact material crushing needs.
We have been designing cement crushers for more than three decades. Our quality is unparalleled. Well never send you a cheap crusher manufactured overseas. Every machine is proudly manufactured in the Midwest, built for robustness by a team of experts you can actually talk to. By using the best materials and keeping design and manufacturing closely paired, your custom crusher will last for decades. Youll get a material crushing solution that ensures your cement comes out consistently smooth and ready to mix, even when your customers require lumps that are less than 3/4 in diameter.
The hammer crusher is a kind of crushing machine which uses impact energy to crush materials. It is mainly composed of shell, rotor, impact iron, lining plate, and screening strips. The shell is divided into upper and lower parts, which are welded after being cut by the steel plate. There is a high manganese steel lining plate inside the shell, which can be replaced if worn. The spindle is equipped with hammers with regular array distribution, and together with a rotary table and a hammer passing shaft, they compose the rotor. When the motor drives the rotor to rotate, the centrifugal forces cause the hammers to point radially outwards. After the large materials enter the crushing chamber from the feed port, they are smashed by the high-speed moving hammers. The qualified materials are discharged from the gap between the bottom screening strips, and the unqualified materials are left in the crushing chamber and repeatedly hit by the hammer until they can be discharged.
Hammer crusher can be used for medium and fine crushing of barite, limestone, gypsum, terrazzo, coal, slag, and other soft and hard ores. The equipment can also adjust the gap between the screen strips, improve the discharge particle size to meet the need of users.
1. High output capacity and reduction ratio;2. Low power consumption and even product granularity;3. Simple mechanical structure, compact and light;4. Less investment, simple maintenance, and convenient management.
Jaw crushers are used for the crushing of very hard and abrasive raw materials for cement manufacturing. Jaw crusher is a type of earlier crushing equipment, which is still widely used in smelting, building materials, electric power, water conservancy, transportation, and other industrial fields. Jaw crusher is mainly used for crushing all kinds of ores and bulk materials into medium particle size. The maximum compressive strength of the crushed materials is 320MPa.
The working principle of jaw crusher is: motor drives belt and pulley to move the jaw up and down through eccentric shaft; when the jaw rises, the angle between elbow plate and jaw becomes larger, thus pushing the jaw plate closer to the fixed jaw plate, at the same time, the material is crushed; when the jaw goes down, the angle between elbow plate and jaw becomes smaller; the movable jaw plate leaves the fixed jaw plate under the action of tension rod and spring, at which time the crushed material is discharged from the lower opening of the crushing chamber. With the continuous rotation of the electric motor, the jaw makes a periodic movement to crush and discharge materials, realizing mass production.
Impact crusher is best suited for crushing hard and medium-hard materials with natural cleavage planes. It is widely used in the industry of metallurgy, cement manufacturing, chemical, engineering, etc.
When the feed material enters into the crushing chamber of the impact crusher and collides with the impactor bars installed on the rotor, which is revolving at high speed. The feed material is broken under the high-speed impact, its fragments are hit back by the breaker plate and broken again until they are sufficiently reduced to the proper size to pass through the gap between the two breaker plates. Adjusting the gap between the breaker plates and the rotor frame can change the size and shape of the material.
The cone crusher is also called gyratory crusher, it is mainly used for crushing medium-hard to hard raw materials. In the working process of the cone crusher, the motor drives the eccentric sleeve to rotate through the transmission device, so that the inner crushing cone oscillates under the drive of the eccentric sleeve. The feed material is compressed and crushed by the fixed conical bowl and the oscillating crushing cone head. The material crushed into the proper size will fall and be discharged from the bottom of the machine.