Crushed stone is a form of construction aggregate, typically produced by mining a suitable rock deposit and breaking the removed rock down to the perfect size using crushers. The common stone crushing machine is hydraulic Impact Crusher, primary jaw crusher, hydraulic Cone Crusher, and so on. It is distinct from gravel which is produced by natural processes of weathering and erosion, and typically have a more rounded shape. Angular crushed stone is the key material for macadam road construction which depends on the interlocking of the individual stones angular faces for its strength. Natural crushed stone is also used similarly without a binder for riprap, stone, and railroad track ballast filter. It may also be used with a binder in a composite material such as tarmac, asphalt concrete, or concrete. To complete stone crushing production line contains following parts: vibrating feeder, primary crushing equipment (Jaw Crusher), second degree crushing equipment (Cone Crusher Impact Crusher or), Vibrating Screen, vibrating feeder, sand washer, Mobile Belt Conveyor, and electric control panel and so on. Stone Crushing Plant has many characteristics: with a high degree of automation, low cost, big crushing ratio, energy saving, high yield, less pollution, convenient maintenance and so on.
Finished products, such as stones and sands, conform to the national standard of construction stones and sand, and have excellent shape and reasonable grain distribution. Stone crushing production line of Hongxing with the perfect facilities, provides many kinds of equipment, such as various types of vibrating feeder, jaw crusher, cone crusher, impact crusher, belt conveyor, also contains mobile crusher plant and grinding mills. So many machine and equipment you can choose, Zenith Machinery provides to you the most effective stone crushing plant and you will feel very satisfy. We network Star provide Professional technology, excellent product quality and intimate after-sales service when you purchase products from our company. As a professional mining machinery exporter, we will win your trust with our delivery speed, and product quality credit enterprises.
Sand making machine is suitable for soft or hard and extremely hard materials crushing, which is widely used in a variety of ores, cement, refractories, aluminum where the soil clinker, emery, glass raw materials, mechanisms built stone gold slag, especially on thesilicon carbide, silicon carbide, sintered bauxite, United States sand contour hard, special hard and corrosion-resistant materials is higher than other types of crushers yield efficacy.Sand maker is also called impact crusher, whose application is wide, not only in hard materials, the great artificial sand used in material performance differences, pre-grinding ultra – fine crushing crushing cement, mining, refractories industry, such as: granite, basalt, limestone, quartz, gneiss, cement clinker, concrete aggregate, ceramic raw materials, iron ore, gold, copper, bauxite, corundum, silica. When the skilled sand maker operators operate the sand making machine, they all have a set of methods which can improve production in the same application environment. Only mastered these methods can we make the enterprises to improve production efficiency, and sand making machine is not prone to problems. Here are the methods we sumarrised to increase the amount of sand making production. First.
We should always pay attention to the tightness of the sand making power transmission belts. If the belt is too loose when in use, it will affect the engine power passes to the sand making machine, when production naturally reduced. So usually use loose belt, we should be fastened in a timely manner. Second, develop the habit of regular inspect internal sand parts wear. Such as Sand internal parts of the impeller and the liner wear is very common, if the serious side of the wear of these parts, while the other side of the lighter wear. At this time will affect the balance of the machine, and great damage to the machine. So when the discovery of these parts wear should timely replacement. But this is important to note, when replacement parts must be replaced at the same time, to ensure the consistency of both sides of the peso.
Otherwise, both sides of the imbalance, the parts will still damage. Third. The internal sand spindle is the main component of sand maker, its balance is important to the normal operation of the machine. But this place is very easy to get wear from time to time, therefore, it is required that we replace these parts when they wear. According to the experience of our technicians. It is more appropriate to replace the sand spindle every 7200 hours, in this period, we can clean the main bear every time, and then add the lubricant fill. Rock crusher: Raymond mill:
50 Anniversary of the first Sound level meter of the world In 2010 we celebrated the 50 anniversary of Model 2203, the father of all the sound level meters. The sound level meter turns 50 years In 2010 we celebrated the 50 anniversary of Model 2203, the father of all the sound level meters. It was the first sound level meter portable of precision and based on transistors of the world. One made during 21 years and it had sales record of 17,300 units. If to this we added its perfected versions, Models 2204 (Impulsive time constant) and 2209 (detector of tips), it was arrived at a total of 32,700 units. This is the history of the first portable sound level meter of the world, as it was registered in the archives and according to us they told those it lived that it. It does half century, the product presentations were not more than a humble one official notice in the section " The news of fbrica" in the last page of the Magazine Technique of Brel & Kjr.
Number 3 of 1960 included the bulletin that reproduces above. Don Sonmetro Our expert in design of sound level meters during decades, Peter Hedegaard, gives this explanation us of how the portable sound level meter evolved: " Model 2203 was the first portable sound level meter of Brel & Kjr. I am not who to say who was the father of this so special design, but most probable she is than as much P.V. Brel like Gunnar Rasmussen would have something to see, although the final design is attributed to Kay Mller Petersen. What had of special that one design was the frontal in the form of cone, that did possible to place the microphone in the housing without its acoustics was affected of significant form.