The types of pressure crushers include jaw crusher, roller crusher, and gyratory crusher. The pressure type crusher uses two hard parts of the machine to press each other to crush rock material. For example, the jaw crushers use the fixed jaw plant and movable jaw plate.
The jaw crusher's main function is to reduce the size of the raw materials or large pieces of material to a sufficiently small size, so as to facilitate the next step of the crushed material. In the quarries and mine materials crushing plant, it is generally used as a primary crusher. The types of jaw crushers are single toggle and double toggle. The construction of the single toggle jaw crusher is compact and simple, and the transmission components such as eccentric shafts are less stressed. Due to the vertical displacement of the movable jaw is small, the material is less excessively broken during processing. Therefore, the wear of the movable jaw plate is less.
Compared with the simple pendulum type, the double toggle type jaw crusher has the advantages of lighter weight, fewer components, a more compact structure and uniform crushing, high productivity. 20-30% higher productivity than a simple swing jaw crusher of the same specification.
Tooth Roller crusher is a new product that is designed and developed according to the structure principle of Gunlock crusher in America. The machine has the advantages of small volume, high crushing ratio (5-8) , low noise, simple structure, convenient maintenance, high productivity, even particle size of crushed materials, low over crushing rate, convenient maintenance, etc. The mall roller crusher is widely used in the mining industry as a secondary crusher.
Gyratory crusher is a new type of crusher that can replace fine jaw crusher and cone crusher. It consists of a concave surface and a conical head, both of which are usually lined with manganese steel. The inner cone has a slight circular movement but doesn't rotate. The gyratory has the advantages of good finely crushing effect, large processing capacity, small vibration, simple maintenance, low cost, and less lining plate wear.
Impact crushers crush materials by impact rather than by pressure. The material is broken in the crushing chamber under the impact force. It can handle materials with side length less than 100-500 mm, with compressive strength up to 350 MPA. It has the advantages of a large crushing ratio and cubic particles after crushing. There are two types of impact crushers: Horizontal Shaft Impact(HSI) Crushers and Vertical Shaft Impact(VSI) Crushers.
In the sand making plant is one of the essential crushers. Cone crusher according to the crushing force is divided into Simmons spring type and hydraulic type. Hydraulic type is divided into single-cylinder and multi-cylinder cone crusher. According to the rotary speed, there are three types: low speed, medium speed and high speed.
The basic structure of cone crusher is similar to that of rotary crusher, but the range is larger. It rotates and presses against the stone on the side of the machine, where it falls into the lower chamber and is crushed again until it falls out of the bottom. Its advantages: reliable structure, high productivity, easy adjustment, and low operation cost.
Hammer crusher(Hammer mill) is broken by an impact between a high-speed hammer and material. This type of crusher is divided into two types: single rotor and double rotor. Single Rotor is divided into reversible and irreversible. Hammer crusher is mainly composed of the rotor, spindle, hammerhead, lining plate and impact plate. And it mainly crushing for coal, salt, chalk, gypsum, brick, limestone and so on. It also used for crushing fiber structure, flexibility, and toughness of strong broken wood, paper, etc.
The advantages of the hammer: larger crushing ratio, high production capacity, uniform products, less over-powder phenomenon, simple structure, light equipment quality, simple operation, and maintenance.
Sand crusher is also called VSI crusher. It is an indispensable equipment for artificial sand manufacturing plant. VSI crusher imported advanced German technology development and production, with the international advanced level. Its performance plays an irreplaceable role in the fine crushing equipment of various materials. There are two types of sand-making machine: stone hit stone and stone hit steel.
The upper and lower hitting guard plate is installed on the crushing cavity wall of the sand making machine. It makes the ore material to be crushed by the impact, friction or high-speed impact between the material and the lining layer formed by the material and the material accelerated by the flywheel when accelerating. The materials do not come into direct contact with the equipment. This method reduces the wear and tear of fittings and prolongs the service life. "Stone hit stone" sand crusher is suitable for material with high abrasion above medium hardness, such as basalt. And the finished product has good grain shape, but the powder content is a little more. So it is more suitable for aggregate shaping.
In the crushing cavity wall of the sand-making machine, the lower hitting guard plate is replaced by the perimeter guard plate. When the ore material is thrown out by the roller, it is directly impacted on the guard plate for many times and the crusher. Under the constant impact, and then the crushing cavity material impact, ore material broken more fully, and the finished material particle size smaller. The "stone hit steel" sand crusher is suitable for small abrasive materials below medium hardness, such as limestone, and the crushing efficiency is high. However, due to crushing depends on the impact, so wear parts are higher. The finished product is slightly worse, it is more suitable for sand-making.
1. 40 years old JXSC Mine Machinery Factory founded in 1985, and we have 40 years of production experience. In the 40 years, we are committed to the development, production, sale of high-quality crushing equipment, mining and mineral processing equipment. We have mature manufacturing technology, excellent engineers, design and manufacture high-yield crushing plant, sand plant mining plant for users.
3. Considerate pre-sale service, after-sale guaranteed service We have a professional sales team to answer all your equipment questions. Take the customer to the factory to see the equipment and free test machine. We provide equipment installation schematic diagram, video installation guide. In some places, our engineers can go to the site to install and debug. All the equipment is guaranteed for one year, except for the wear parts.
Both crusher production line and sand production line basically use vibrating screen. There are many kinds of vibrating screen, which can be divided into circular vibrating screenand linear vibrating screenaccording to the movement track of materials. These two types of screening equipment are usually used in daily production. Whats the
Multi-cylinder hydraulic cone crushers are widely used in the sand aggregate and mining industries, especially in the medium and fine crushing processing systems of medium-hard materials. Weintroduce4 common problems in the operation of cone crusher: abnormal vibration, high noise, easy dirty lubricating oil, high oil return temperature, and introduce how
JXSC Mine Machinery provides stone-crushing solutions for a range of industries including mining and construction. We manufacture three types of machinery, namely, the crushing machine, the sand-making machine, and the mineral processing machine. Various models of these are available as per customer needs. Our products are cost-effective and high-quality. In
Jiangxi Shicheng stone crusher manufacturer is a new and high-tech factory specialized in R&D and manufacturing crushing lines, beneficial equipment,sand-making machinery and grinding plants. Read More
Over the past 30 years, SBM has customized millions of aggregate production programs and equipment for global customers. Aggregate production plants have been being established one by one, which benefits by excellent quality of products and our service covering the whole life cycle of a production line from the pre-sales consulting, program design, equipment production to latter installation guidance and spare parts' supply. Excellent quality of products makes SBM become trustworthy brand in aggregate industry.
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For production of aggregate, similar investment schemes can be used as valuable references which can make you have a rough idea of scheme design, model selection of machines, construction, operation and investment returns for your future projects. We believe that our customer sites can bring you the valuable information that you need.
Each company or site should have clear safety guidelines outlining best practices for the entire site, as well as when working with crushers. Before even stepping on site to work with your sites crusher, employees and operators must be trained on all safety procedures of your site and crusher.
For instance, is the operator clear on warning signs to look for, emergency stop locations and appropriate walkaways? Make sure the operator or maintenance personnel perform a hazard analysis before each new operation. Conditions such as time of day, weather and area around a piece of equipment can all affect the operation about to be performed.
It is also a good idea to have a fresh set of eyes look at conditions. Even when someone is experienced and well trained, it is very easy to see the same thing day after day and accept the way things are or even miss something.
The aggregate industry is heavily regulated, but regulations alone will not make managers, workers, contractors and others safer or better safety stewards. If a company wants to achieve high safety and environmental standards, that company and the communities in which it does business cannot achieve these goals through fear of retribution for non-compliance.
To be successful, the industry must rise above the mentality that it is simply complying with regulations, inspections and penalties, and instead focus on these areas because it is the right thing to do. A good place to start is to provide effective signage, keep the site clean, walk the site daily and maintain quarry faces and haul roads.
Dont allow yourself to turn a blind eye to a hazard or a hazardous situation. Dont allow yourself to say, Its not my job or Im not the one who left it there or someone else will fix it. Every incident, accident or event should be investigated. Through these investigations, recommendations should be made to improve safety and to prevent the event from occurring again.
While new technologies and equipment are emerging every day to make the workplace safer, your best resource is your workforce. Its not only important to make sure employees are trained on the safety procedures of the workplace, but also on the proper use of their machine.
Untrained, unknowledgeable work staff can lead to an unsafe work environment. Just because a person is on your site working with other equipment doesnt necessarily mean they are trained on the proper use of a crusher or a breaker. Do they know proper feed size and capacity? Not knowing these can lead to oversized material entering the crusher and cause malfunction.
Safety on a crusher starts with the person feeding the plant. The person feeding the plant needs to be trained on best practices specific to the crusher they are working with. An operator may have years of experience operating and loading a cone crusher, but that doesnt translate into experience loading and operating a jaw crusher.
Operators need to be trained on what to look for to prevent unnecessary maintenance. Spending the time and resources to train your operator not only leads to a safer workplace, but it ultimately increases production. The safer you are, the more productive you are.
When operators proactively keep their crusher running safely and effectively, they increase production. A couple of minutes spent on cleaning or maintenance can lead to hours of productivity later and an overall safer working machine. Operators should also keep detailed records of maintenance and other issues.
Make sure your operator is in protective clothing. Also, when you reach the crusher, make sure all guards and safety devices are in place, secured and functional before operating. Be sure to review and follow all lockout, tagout and tryout procedures for the crusher when performing equipment maintenance, repairs or adjustments.
Additionally, keep your crusher working safely and efficiently by performing regular maintenance inspections. This allows you to pinpoint problems that may make the machine unsafe to use. Some tips to keep a safe crusher: Operate at the appropriate capacity. Keep platforms and areas around the machine clean. Ensure lubrication, flow, temperature, wear and pressure are monitored.
Safety is something that can be practiced and planned daily, monthly and yearly. Try to make yourself or your workspace safer every day. Clean up hazardous debris. Walk to your workstation a different way to see if you notice anything unsafe.
In our industry, hazards are everywhere due to the nature of our business and the equipment and tools we use. When less-than-desirable housekeeping practices are present, they add unnecessary hazards to the workplace. Housekeeping takes a lot of time if it is practiced once in a while, but it takes virtually no time at all if it is practiced continuously.
Its important to make sure your crusher operator follows all operational guidelines and that all safety best practices are in place. But also take the time to make sure your entire site is properly trained on site safety procedures and best practices. Hold regular safety meetings to review new procedures or address any safety concerns. Set yearly safety goals and commend operators on years of safety excellence.
With proper planning and preparation, maintenance programs can be made easier and more effective. Importantly, operations can meet time management, cost savings and safety goals by employing good maintenance strategies.
So workers may take shortcuts that ultimately cost the operation more in the long run, Macini says. Crews need to be trained in the proper methods, and management needs to provide the support and resources to do the job correctly.
Cleanliness is key: Keep oil systems free of contamination. With a production, production, production mentality comes the attitude of, lets hurry up and change the oil. But crews dont bother to clean out any sludge buildup in tanks; and the new oil becomes contaminated.
Keep the breathers clean as well, and keep the right gaskets and oil filters on hand. Dont run oil filters into the red. Always have the right replacement parts and cleaning components set aside and ready to go. Be proactive, and remain prepared as oil-change intervals come up.
Keep the toggle area clean, particularly before any crusher adjustments. Its best to wash out the toggle seats and plates daily, as wet material buildup results in a gritty compound that grinds down components, causing premature wear.
Also, remove dirt and debris from crusher frame surfaces and from areas around the machine. Monitor discharge chutes for any obstructions and check for any material buildup under the jaw to avoid excessive wear on the pitman.
Conduct regular inspections: As specified by owners manuals, crews should follow the discipline of daily, weekly and monthly recommended inspections. While there are many inspection items listed on a manufacturers maintenance schedule, several are worth highlighting.
Check jaw dies daily, making sure bolts are kept tight. Check cheek plates for any excessive wear that may affect the mainframe of the jaw. Monitor flywheels for cleanliness, tightened bolts and potential cracks; and make sure drive belts arent worn or cracked.
Additionally, log your coast-down time daily. How long does it take the machine to come to a dead stop? If the time starts to shorten, this could indicate a bearing problem. Check all indicators and switches daily for proper operation as they are integral to proper shutdown in the event of issues such as high temperatures or low hydraulic pressures.
Dont over-extend wear parts: Avoid running jaw dies so long that they become too thin. You may find that you can no longer flip them over and now, youve lost half the wear. To get the full life of the manganese, change them out sooner than later.
Know the right fit for you: Consider that if youre an operation resigned to a less-than-the-best maintenance regime, youll be better off with a greased-versus-oil bearing machine. Requiring less-intensive maintenance than that of oil-lubricated systems, grease machines need a proper cleaning of the fittings and the application of the right grease. Applying the wrong grease (because thats whats on the shelf) is not an option, as this shortcut can ultimately cause equipment failure.
Update your equipment: As an example, Macini points to modern crusher designs that incorporate hydraulic tensioning cylinders that replace conventional toggle tension rods and springs. As a result, the tension cylinders automatically maintain the proper tension on the toggle, eliminating the need for spring adjustment. With proper tensioning being automatic, producers save time as well as reduce wear and tear on parts.
Furthermore, two oversized hydraulic cylinders behind a moving toggle beam enable all closed side setting (CSS) adjustments. A flip of a switch extends or retracts the cylinders and the adjustment is complete and made safely without shims being needed at any time. For safe toggle maintenance, the hydraulic adjustment cylinders push the pitman forward where it is locked into position with lockout pins, which insert from the side.
Then hydraulic tension cylinders, mounted on the side of the toggle, pull the toggle beam back, allowing it to be safely lowered away. Operations stress that this safety aspect is very important to them as they no longer need to have workers with wrenches climbing in, around or under this equipment, he says.
To prevent crusher damage, downtime and difficult maintenance procedures, the hydraulic overload relief system opens the crusher when internal forces become too high, protecting the unit against costly component failure. After relief, the system automatically returns the crusher to the previous setting for continued crushing.
He goes on to explain that typical older-style crushers may make use of a shear toggle that acts somewhat like a fuse. In other words, the toggle is a weak link that bends or breaks away when pressure becomes too great, and prevents further damage. But once the toggle is sheared or broken, the maintenance crew may have to spend up to four hours to remove and replace it, and that assumes the part is available.
Develop a maintenance discipline: So ditch the shortcuts. As with anything, you get out of it what you put into it. Learn to do maintenance jobs right the first time, and continue the discipline throughout the life of the equipment. The payoff is measurable in time and cost savings, and a far safer working environment.