Granitic rocks are one of the main rocks that make up the continental crust. Granitic rocks are widely distributed in China. In the southeast and northeast, the distribution is more concentrated. The exposed area of granite in the southeast region is more than 200,000 km3, equivalent to 20% of the total area of the southeast region. Due to the characteristics of granite, the application of granite is more and more, the characteristics of the new vsi sand making machine structure granite, the use of high manganese steel lining plate and hammer head, fully broken granite, so that the granitic type of granite uniform, in modern engineering construction more applications. The main minerals in granite are quartz and feldspar. Without them or without one of them, granite cannot be named. The quartz content in granite is about 20%-50%. Feldspar content is about 60%-70%, mainly potassium feldspar, plagioclase as the second. The dark minerals are mainly biotite, with occasional Muscovite, and common amphibole or (and) pyroxene. Granite is divided into two species according to plagioclase: if plagioclase is more feldspar or sodium feldspar, known as calc-alkaline granite; If it is sodium feldspar and contains alkaline dark minerals (such as sodium amphibolite, sodium ferroamphibolite and aegirine pyroxene, etc.), it is called alkaline granite. Granite is mainly distributed in the upper layer of continental crust, and can be divided into shallow zone rock mass, middle zone rock mass and deep zone rock mass according to the depth of rock mass formation. Shallow-zone rock mass has obvious cross-shear relationship with surrounding rock, and is sometimes associated with the same volcanic rock, which is called sub-volcanic granite. Some yanshanian granite in the eastern coastal area of China belongs to this category. Most of the mid-belt rock masses have large basement and are generally complex, often emplacement in the center of the compound anticlinal axis or the camber structure. The deep zone rock mass is usually orogenic, and the surrounding rocks are generally amphibolite facies to granulite facies, which are often associated with various types of mixed rocks. The occurrence of granite usually includes granite camber, rock foundation, rock plant, rock cover and rock wall, etc. Because granite is widely distributed in the fold belt of different times and the shield area of precold period, it has been subjected to strong geological tectonic stress for many times, rock and minerals have undergone strong deformation, and a variety of dislocations have occurred in the crystals. The dislocation density can reach 108-10 times bearing error/cm2 (such as quartz crystal), and energy is stored (> In the lattice, the stored energy can be as high as 5.85j /g, and generally as high as 2.09-5.02j /g. Therefore, granite sometimes shows the alkali activity of slow reaction, but the reaction significantly appears the extension time of expansion and cracking, often continues to 30-50 years, should be vigilant. There are many projects abroad due to the use of granite aggregate expansion damage. Broken granite new sand-making machine, the structure of the new sand-making machine is simple, the operation, the price is cheaper than the same functional products, is a good choice for granite crushing plant.

Jaw crusher is a kind of coarse crushing equipment, which is mainly used for crushing stone and ore, such as river pebbles, pebbles, granite. The jaw crusher first appeared in 1858. It was first widely used in road construction and later in mines. It can now be used for medium-sized crushing of various ores and large materials. The maximum compressive strength of the crushed material is 320 MPa. It also has the characteristics of large crushing ratio, uniform product granularity, simple structure, reliable work, easy maintenance, and economic operation costs. When the stone crusher project report india, the motor is used as the driving force, and the eccentric shaft is driven by the V-belt and the grooved pulley through the motor pulley to make the movable jaw reciprocate according to the predetermined trajectory. The materials in the crushing cavity composed of plates are crushed, and the finished materials are discharged through the lower discharge port. The discharge port (discharge port) can be adjusted according to user needs to obtain qualified product material size. The granules crushed by the crusher are different for different equipment and materials purchased by customers. So, how to adjust the output particle size? 1. By adjusting the tension spring and the adjusted back wedge, use two wedges placed between the rear seat of the thrust plate and the frame to adjust the size effect of the particles. This method is suitable for small crushers. 2. Adjusting shims, that is, placing a set of shims between the back of the support plate of the rear thrust plate and the rear wall of the rack. By increasing or decreasing the number of shims or changing its thickness, the purpose of adjusting the ore discharge can be achieved.

Generally, when users use Raymond mills, the requirements for stones are different. For example, what is the hardness of the stones milled by Raymond mills, and the required moisture content of the stones is within a few percent, etc. The users of the milling machine are all confused, so the following is a brief introduction by the editor of Shanghai Shanzhuo Heavy Industry: During the processing of the stone by the raymond mill in india, the stone is first placed between the grinding rings of the grinding roller with a spatula, and the stone is tightly crushed under the centrifugal force and gravity of the grinding roller. On the ring, the stone is finally crushed and ground into powder. After understanding the working principle of Raymond mill, a lot of heat will be generated inside the grinding cavity during the grinding of the stone. If the moisture of the grinding stone is too large, the moisture of the stone itself will be heated during the grinding process. It will evaporate to a certain extent. In this way, the airflow direction inside the grinding chamber of the Raymond mill will be changed. If the situation is serious, it will lead to low capacity and explosion accidents. During the grinding of the stone by the Raymond mill, due to the excessive moisture of the stone itself, the stone sticks to the inside of the grinding cavity due to the high humidity during rolling, which causes more and more stone powder to adhere. The speed and pressure of the Mongolian mill are also increasing, which eventually leads to the output of the mill. If this phenomenon is not handled, the friction of other components will be increased, the speed of grinding will be reduced, and the wear on the accessories will be caused, which will reduce the life of the Raymond mill. However, different types of stones require different moisture during operation. Generally, the Raymond mill requires that the moisture is generally not higher than 6%, so that it can better display good results. This ensures that the milling efficiency and quality of the Raymond mill can achieve good results.

There are endless ways to increase the production of ball mills, and ball mill manufacturers can try them, but in the pursuit of ball mill production methods, we must pay attention to scientific methods to create more economic benefits for the majority of ball mill customers, for this we must continue to work hard! Improve Various methods of ball mill output Many ball mill manufacturers are thinking about the same problem, that is, how to increase the output of the ball mill based on the original. Of course, SBM Mining Equipment Co., Ltd. also continues to summarize and improve, and then summarizes the following four methods To share with you: First, reduce the particle size of the ore grinder into the grinding material, and the basic work must be done well, to control the moisture of the material into the mill, generally 1.5% ~ 1.8%. Second, strengthen the management of grinding bodies, some of the grinding balls are steel balls, and some are steel forging. Manufacturers need to increase the grinding body loading capacity within a suitable range to a large extent. The steel balls in a warehouse must be smooth, high quality, and make up large balls in time. The second warehouse is mainly for grinding. The larger the surface area of ​​the grinding body, the finer the grinding material. 3. The ventilation inside the ball mill must be strengthened. This can cool the material inside the mill, improve the grindability of the material, discharge the water vapor in the mill in time, reduce the phenomenon of clogging of balls and rafters, and increase the flow rate of the material in the mill. Generally speaking, the wind speed of open-circuit mill is 0.7 ~ 1.2m / s, and the wind speed of closed-circuit mill is 0.3 ~ 0.7m / s. Fourth, the structure of the ball mill is improved, and the air extraction device is installed in the exhaust pipe to reduce the over-milling of the material.

The phenomenon of residual wind will occur during the operation of raymond mill. The occurrence of residual wind seriously affects the normal use of the equipment. When the residual wind occurs, it must be resolved in time. In this way, the residual wind can collect the materials normally, quickly and effectively. Why is there a phenomenon of residual wind in the Raymond mill? 1. The Raymond mill in operation will generate heat, making the temperature of the fluid in the loop higher than the workshop by 30 degrees Celsius. The hot air flow must have a boring effect on the material, so that the moisture in the material will be vaporized, and the system flow temperature. Too high, the entire fluid expands due to the increase in temperature, and the equipment leaks too much, which results in excessive air intake during the use process and too small air exhaust. During the production process, a section of the loop is under negative pressure. Above the feeding port of the mill, they are in the negative pressure zone. The maintenance door and the feeding port of the raymond mill are not tightly sealed during operation, and the air will be sucked in through the feeding port when feeding. 2. The wind power system is one of the factors affecting the output and granularity of the equipment. If the system is not tightly sealed, it will cause air leakage or powder dust, which will make the workshop environment harsh and waste a lot of materials. Therefore, it is necessary to discharge the excess surplus air through the exhaust air pipe to remove dust, so as to avoid the disturbance of the production workshop. At the same time, the position of the residual air duct should be placed on the air duct of the blower and the large cyclone separator, so that a large amount of material enters the residual air duct. 3. When using Raymond mill, you can't just understand the knowledge of Yu Feng, but also understand that users must pay attention to all aspects of the understanding when using, so that the user's equipment can play a good state. The above is the introduction of the residual wind of the Raymond mill. I hope it will be helpful to everyone and friends. If you encounter problems that cannot be solved during production, you can consult us online and we will analyze your own equipment in detail. Some problems and give corresponding solutions.

Gypsum is a monoclinic mineral whose main chemical component is calcium sulfate (CaSO4). Gypsum is a widely used industrial material and building material. Can be used for cement retarder, gypsum building products, model making, medical food additives, sulfuric acid production, paper filler, paint filler, etc. Gypsum board is an energy-saving and environmentally friendly product from the entire process of production, installation, and use. It can greatly reduce energy consumption and carbon dioxide emissions, and has become a new building material product that the country strongly encourages to use. Driven by a series of government bans on sticking and restricting stickiness, the application area of ​​gypsum board is expanding. Previously, China's gypsum board had a sales growth rate of more than 30%, and it is expected that it will maintain a rapid growth of 10% -20% in the next ten years. At present, energy conservation and emission reduction has become China's basic national policy. This is not only the need to improve the quality of economic growth, but also the obligation of a responsible big country. Many companies in the paper gypsum board industry do not implement national standards, their own standards are confusing, and gypsum powder is used instead of gypsum as a raw material to reduce costs. This new type of material with good market prospects has been promoted. A certain obstacle. For gypsum processing and reuse, the rigidity requirements of the gypsum vertical roller mill are relatively low. However, due to economic benefits, the stability and milling efficiency of the gypsum vertical roller mill are relatively high. Claim. Therefore, the gypsum vertical grinding mill requires that the gypsum vertical grinding mill has the highest possible grinding efficiency under the condition that the gypsum powder processing is stable and pure. SBM heavy machine is China's large vertical grinding mill research and development and production export base, is an enterprise specializing in the production of micron powder grinding equipment. Including Raymond vertical grinding mill, vertical vertical grinding mill, high pressure suspension roller vertical grinding mill, European coarse grinding mill, well-known in the industry, it can be called a model of gypsum vertical grinding mill, gypsum vertical grinding mill The mill (European vertical roller mill) is used to process gypsum, which not only increases the output, but also has low power consumption. It is equipped with more advanced dust collectors and the dust emission concentration is completely lower than national environmental protection regulations, which greatly reduces production costs for enterprises. Introduction to the working principle of gypsum vertical roller mill: The raw slag of the gypsum vertical grinding mill enters the feeding bin through the grabber, and after feeding, it is fed into the helical feeding mill by the conveying belt into the screw feeding device. In the vertical roller mill, the gypsum material rotates with the grinding disc from the center under the action of centrifugal force. After moving to the edge, after the compaction, deaeration, and grinding processes, the material is taken up by the hot air entering from the air ring at the edge of the grinding disc and dried instantly. The finer particles are taken to the classifier for sorting, coarse powder Return to the grinding disc and grind. The qualified fine powder is taken into a bag dust collector, and the air powder is separated after the finished product is collected. After the finished product is collected, it is transported into the finished product bulk warehouse, and the exhaust gas is discharged after being silenced by the fan. Part of the hard-to-grind large-scale gypsum material enters the external circulation system through the slag discharge port at the wind ring, and is fed into the mill by the hoist again for grinding.

High manganese steel has become the leader in many kinds of crusher equipment. Since the crushing equipment is a product that often deals with stones, the material of E plate has become a key factor to check whether the Gravel crushers equipment can produce efficiently. According to the current assembly structure of crushed stone products, usually consisting of a movable jaw plate and a fixed jaw plate, we all know that the jaw crusher's Gravel crushers is subject to work hardening when subjected to severe impact and strong pressure deformation during use. Martensite is formed, which can form a high wear-resistant surface layer, while the inner layer maintains excellent toughness, so even if it is worn very thin, it can withstand a large impact load, so if it is to be large The crushed stone crushing production requires the overall fixing and calibration of the E plate. Hubei Therefore, as a whole, whether it is a jaw or a counterattack, the accessories need to be calibrated as a whole, so that the quality of the whole machine can be efficiently produced later.

There is no uniform rule for the determination of manganese content in precision castings. Various methods are very different. For the promulgation of national standards, they are summarized and stored here in case they are needed. To measure Mn in Precision casting, you can find relevant national standards, such as the determination of manganese content GB / T 5121.14-2008, you can find the detailed answer you need, and there are very detailed steps. As for what brand of 721 measurement standard is correct, you first refer to which national standard and see at which wavelength the actual measurement is made. If it is within 360-1000, selecting 721 can solve the problem, otherwise UV-visible spectrophotometry is required meter. If the budget is sufficient, you can choose Japan; if the budget is small, you can choose domestic. Simply put, the Mn content of the standard steel in precision castings is given and known. After processing the standard steel, you prepare a series of solutions with different concentrations c, and then measure the absorbance value A to make a standard curve; Measure the absorbance value with your prepared sample solution, and get the Mn concentration according to the curve, then you can estimate the Mn content of the sample. The formula is actually A = εbc, A is measured by a spectrophotometer, c of the standard steel is known, and an A-c curve can be made. b- thickness of liquid layer, ε-molar absorption coefficient.

The investment in machine-made sand production lines has been very encouraging recently. Its output and taste will directly affect the actual revenue of users. How to increase the output of the product while ensuring the taste of the sand is really disturbing. As a manufacturer of machine-made VSI sand maker, we have taken over thousands of user cases, so we have integrated several common techniques, and see if there are any starting points that can optimize your production line to help you get higher Yield, better sand. Yield increases and the taste of the finished product cannot be discounted Ignoring the taste of sand and blindly increasing the output is not advisable. At present, construction sand has high requirements. The grit size and purity have strict parameter indicators. The quality of sand is ignored in pursuit of high yield. The obtained sand is in the market. China does not occupy a competitive advantage. The skills we have introduced to you have been verified by many users, which can not only increase the production of sand on the production line, but also give you a better taste of the sand. Tip one: choose the right equipment It ’s very important to choose the right equipment. Do n’t be greedy and cheap. Our sales team is in the process of user docking. Many users think that other manufacturers are cheaper. After understanding the configuration given by each other, our staff will basically Users are advised to place orders cautiously, because many small manufacturers have limited strength, in order to seize the customer base, pull down the offer, and boldly confuse users for the configuration, and some users who are new to this industry are easily confused. There are many potential problems with subsequent production lines, and once they are turned on, there will be a steady stream of trouble. Technique two: timely maintenance The equipment has a maintenance cycle. This is very important. The equipment of the SBM sand making machine can work continuously for about 20 hours a day, but every 4-5 hours of work, you need to stop and rest for maintenance. During the operation of the equipment, it will bear a large number of impact loads, and many minor faults, such as component wear, lubrication, etc., need to be checked after a period of work, timely replacement and maintenance if there is a problem. Tip 3: Strictly follow operating procedures Reasonable feeding, but no load, no-load, these are commonplace considerations, thinking that for the production line, not a piece of equipment is running, every link is well-organized, in order to maintain the orderly operation of the production line, the operating procedures are not exaggerated, When our after-sales team is serving users, we find that many users do not care about strictly abiding by the operating procedures

In the milling industry, from the initial Raymond mill to the various types of milling equipment with different functions, the reformation of the milling machine not only makes production more convenient, but also brings considerable economic benefits to users. However, no matter what type of mill, there will be dust pollution during the production process, so there is a new partner of the mill-dust collector. At present, calcite powder mills are very popular in the industry. Recently, users have questioned the dust collector effect of Calcite Powder Grinding Mill. The dust removal effect of calcite powder mills is not good. What is going on? If the precipitator of your calcite mill is a bag filter, it may be because the filter area of ​​the bag filter is too small and the actual air extraction volume is insufficient. It is difficult to remove the dust hood and the cavity in the discharge port of the mill. A slight negative pressure is formed, which causes larger dust; in addition, when the ground material has a high humidity (after rain or after the material is wet), the dust particles entering the dust collector are coarser than when the dry material is ground, and the bag type dust collector It is easy to paste bags, and the feeder is easy to be blocked. As a result, the ventilation resistance of the bag dust collector is greatly increased, the ventilation capacity is reduced, and the dust is serious. During the material falling from the belt conveyor inside the calcite mill, the air and the material enter the closed dust removal hood together, and the dust-containing gas diffuses outside the hood through the gaps and orifices on the hood wall, which pollutes the environment. There is also whether the daily maintenance of the dust collector is in place. There are many failures of the bag dust collector and supporting parts. If the routine maintenance is not in place, it will not only affect the normal dust removal, but also increase the maintenance workload of the equipment. As a responsible manufacturer of pulverizers, our calcite pulverizers will be tested again and again before delivery. If there is a problem, it will be resolved in time to ensure that the equipment arriving at the user will not have any major production problems. Of course, after using the calcite mill dust remover for a period of time, if it is not cleaned and maintained in time, the dust removal effect will definitely decline. Purchase the mill to Shanghai SBM Heavy Industry.