In the design of the silo, the material arching phenomenon in the silo is often involved. When the moisture in the silo is too high or when the material is a material that is not easy to flow, it tends to be arched near the discharge opening of the hopper. As a result, the flow of materials is seriously affected, resulting in the warehouse material not being able to supply normally. To this end, the paper will introduce the design requirements of the silo, the flow form of the material in the silo, the cause of arching, the anti-arching and arching technology, and related patents. I. Silo requirements and material flow The silo is not only a container for storing materials, but more importantly, it has relevant process functions. Therefore, the silo should be designed to meet the following three requirements: it can store a specified amount of silos; it has sufficient strength to withstand the pressure generated by the materials in the silo and the force that the external natural environment may exert on the silo; When discharging from the silo, the material can smoothly and evenly flow out from the silo outlet, and the discharge speed is evenly controllable. The fluidity of the material in the silo is an important indicator of the performance of the silo. In the actual production, some silos can not be well discharged, resulting in arching, causing serious blockage, and some form a pipe bucket (also called rat hole), so that most of the material in the silo can not be excluded, greatly reducing the material The storage function of the warehouse, this phenomenon appears to a large extent due to the poor fluidity of the materials in the silo. According to the current classification, we can divide the flow forms of objects in the silo into two types: the overall flow and the central flow. (1) Overall flow The so-called overall flow means that all materials flow to the discharge port when unloading, there is no "dead zone", the material level is evenly reduced, and the discharge flow is stable and uniform. The ideal flow pattern should be the overall flow, which ensures that the materials are uniformly discharged in the order of first-in-first-out, and has the advantages of stable discharge rate, uniform discharge density, and consistent storage time of storage materials. (2) Center Flow At the beginning of the discharge of the center, only the material at the top of the reservoir is in motion, and the material located around the center slides and descends toward the center to form a central passage, so that only the material at the center portion flows to the discharge port, in which The part Other than the flow zone is the flow "dead zone". The main characteristics of the central flow: 1 the flow order of the advanced out. Because the material near the wall may not be static, the material of the advanced warehouse may come out later. 2 Produce a rat hole. Due to the hopper flow, if the material has sufficient viscosity, the material near the wall will not flow out. 3 Unbalanced flow. In the funnel flow bin, the surrounding materials are collapsed by exceeding the angle of repose of the object itself, so the unloading is unbalanced, and the impact force of the slumping material further compacts the material of the silo discharge port. And arch it. 4 currents. If the stored material is very fine-grained, it will vaporize when it collapses, making its flow properties as good as the fluid, so that it will emerge from the silo outlet. 5 layering. Since the materials in the middle and the surrounding area alternately flow out alternately when the funnel flow bin is unloaded, the stratification problem occurs when the silo is fed. The figure below shows a schematic diagram of the overall flow, center flow and arching. There are two main factors affecting the fluidity of materials: material properties [3] and hopper shape [1]. 1. The nature of the material is the most important factor affecting the fluidity of the silo. The specific aspects are as follows: the friction coefficient between the material and the inner wall during steady flow; the static friction angle between the material and the silo wall; compaction, and storage materials in the silo The height is related; gas permeability, if the material particles are very fine, the material permeability is deteriorated, the material forms a negative pressure in the warehouse, and an arch is formed at the outlet of the silo. 2. The influence of the shape of the hopper is mainly reflected in the three aspects of the hopper inclination angle, the hopper size and the shape of the hopper: the inclination angle of the hopper is large, the speed of the material flow is fast, and the flow form is mainly the whole flow. When the inclination angle of the hopper is small, the silo flows out. The speed is also slower, especially the speed near the wall may be zero, forming a central flow; the smaller the discharge port of the hopper, the smaller the flow rate of the silo, and the possibility of arching, the lower part of the silo is close to the hopper The arch will also be more severe; the shape of the hopper outlet is also a factor affecting the fluidity of the material, and the circular outlet is easier to arch than the rectangular outlet. Second, the cause of arching and its type There are many factors in the arching. There are three main factors: the material storage time is too long, the moisture increases, the material agglomerates; the material and the warehouse wall adhere; the structure of the silo causes the material to flow smoothly, and the local pressure will be caused. Too big to arch. (A), the impact of storage time In general, the longer the storage time, the stronger the compactness of the material, and the internal humidity increases due to sealing and the like, resulting in poor fluidity of the material, and the easier it is to form an arch. Therefore, we must reduce the storage time of warehouse materials to a certain extent, and at the same time, the storage capacity of silos should be reasonable. In the production scheduling, we should reasonably grasp the stock reserves and arrange the use of the stock warehouses, so as not to cause too long storage time of materials. The arch is compressed so that the material cannot be discharged. (B), the adhesion of materials and warehouse wall impact Due to the adhesion between the material and the wall of the bin, the material adheres to the inner wall of the silo, resulting in arching. At present, ultra high molecular weight polyethylene sheet (LHMWPE) is used as the lining of the silo, and its excellent mechanical properties are used to reduce the resistance between the material and the inner surface of the silo, thereby preventing the arch. (C), the impact of the structure of the silo on the material arching The structure of the silo mainly affects the fluidity and compactness of the material, which has been introduced previously. There are four types of silo arching: one, the compression arch, that is, the powder is subjected to pressure, so that the consolidation strength increases to cause arching; Second, the wedge arch, the granular objects mesh with each other to achieve a balance state. The formed arch; three, bonded and adhered arch, the material with strong adhesion under the action of water, moisture absorption or static electricity to enhance the adhesion of the material and the wall of the warehouse; fourth, the air pressure balance arch, Due to the poor air tightness of the silo unloader, the air rushes into the silo, and the arch formed when the upper and lower air pressures reach equilibrium. Third, anti-arch and broken arch measures The anti-arch and the broken arch are essentially different. The purpose of anti-arching is to prevent arching. The purpose is to eliminate or weaken the compressive stress on the vertical plane of the arch line and reduce the friction between the materials and the material wall. And improve the fluidity of the material. The arching is to study how to break after arching, mainly by external force to break the closed arch from the mechanical point of view. The arching principle of the arching device is mainly to make the wall of the chamber vibrate and move the material, and some use the pneumatic force to destroy the formation of the arch. At the time of use, attention should be paid to the action of the arching device and the unloading action. The arching device can play a role in breaking the arch, but it can only be used as an auxiliary measure. Therefore, I personally think that the research on anti-arch technology is more important than the arch-breaking technology. (1) Anti-arch technology 1. Change the inner wall material of the silo Changing the material of the inner wall of the silo can effectively prevent arching, because the smoother the material of the inner wall of the silo, the smaller the friction with the silo, so that the easier it will flow, thus inhibiting arching to some extent. Therefore, we should choose the material with less friction factor as the inner wall of the silo as much as possible under the premise of satisfying the strength. At present, ultra-high molecular weight polyethylene sheet (LHMWPE) is usually used as the lining of the silo, and its excellent mechanical properties are used to reduce the sliding resistance between the material and the surface of the silo, thereby preventing the arch. As a new type of engineering material, it has the following properties: 1) low surface activation energy and non-bonding properties; 2) good wear resistance and high impact strength; 3) low friction coefficient and good self-lubricating properties; 4) corrosion resistance, low temperature resistance, even at the time High impact resistance. 2, improve the shape structure of the silo At present, the common shape of the silo has a cylinder, a square and a rectangle. Under the same conditions of the discharge cross-sectional area, the discharge capacity of the warehouses with different shapes is also different, because the square warehouse is easy to form a dead angle at the junction, and the circular one is not. The ills, so the circular warehouse discharge capacity is the largest, the square warehouse is the second, the rectangular warehouse is the smallest. 3, the improvement of the discharge port Under the premise of meeting the requirements of design process and processing technology, the inclination angle of the hopper should be as large as possible, and the size of the discharge port can be appropriately increased. In addition, the shape of the outlet of the hopper is preferably designed as a rectangle, because the rectangular outlet is less easy than the circular outlet. Arching. Or from a certain point of view, improve the unloading device, which can effectively prevent arching. 4, the shape of the cone hopper changes Improving the shape of the tapered discharge can effectively reduce the pressure of the stock and the wall, thereby reducing the friction between them. The method can also be a surface modification method. From the perspective of the cross-sectional shrinkage rate of each part of the bucket, the longitudinal section curve shape of the bucket has a certain influence on the flow state of the coal. For flat wall silos, the inclination angle is generally fixed, and the closer to the exit section, the greater the shrinkage rate, and the more the stress is gathered, the easier it is to arch. The hyperbolic silo wall has an equal section shrinkage rate, and the wall changes in an exponential curve. The wall inclination angle changes. The closer to the outlet inclination angle, the more the resistance of the coal in the process of falling flow is basically unchanged. A uniform continuous flow is formed, which is not easy to arch. Practice has proved that the use of hyperbolic silos can effectively prevent arching. There is also a shape called a nose-shaped warehouse, which is a special-shaped silo whose wall protrudes like a "nose", which can disperse the pressure of the material and make the material of the discharge under the "nose". In a loose state. The wall below the tip of the nose is subject to greater pressure and must be thickened or fractured. 5, increase internal auxiliary equipment For some silos with large storage materials, the fluid is usually added in the middle and lower part of the hopper. Its function is to improve the flow pattern of the powder in the hopper and reduce the pressure on the outlet of the silo. The fluid change can be a horizontal baffle, a vertical baffle or a sloping baffle. Since a pile of material is formed above the horizontal baffle, it is easy to deteriorate and agglomerate for a long time. To prevent this from happening, the baffle is made into a conical shape, which is often referred to as a decompression cone. An annular space is formed in the lower part of the pressure reducing cone to reduce the pressure of the material. Vertical and inclined baffles eliminate lateral pressure between some of the material, and the material is divided into several streams with reduced friction and shear. The mounting and fixing method of the insert body may be carried by a wire rope on a beam on the upper part of the coal bunker or by a tripod fixed on the inclined wall of the funnel. This law only applies to shallow warehouses. It is ensured that the inclined angle of the bottom of the warehouse properly increases the inclination angle of the bottom of the warehouse, which is beneficial to the smooth discharge of the silo. However, if the bottom of the warehouse is too steep, the viscous outlet side of the silo is configured to at least one side of the straight wall due to its outlet side configuration, thus reducing at least the arching force generated by one side, thereby reducing the arching. The possibility of making the export material loose is conducive to discharge. For a larger capacity silo, two or more outlets can be provided. (two) broken arch technology 1, artificial arch method The artificial arching method generally requires a number of holes to be reserved on the inclined wall of the discharge opening of the silo. Once the silo is arched, the tool is inserted into the silo to cause the material arch to collapse. The method is the most primitive, has the advantages of simple design and low cost, but the effect of breaking the arch is poor, and the manual dredging is time-consuming and labor-intensive, affecting the production time, easily polluting the environment, failing to achieve automatic arch breaking, and after unblocking the material, There will be a large amount of material undershoot and there are significant safety issues. 2, vibration break arch There are two basic forms of vibrational arching, namely vibrating the silo wall and directly vibrating the material in the silo. The vibrating silo wall is to install the vibrator on the silo wall of the cone part of the silo, and vibrate the silo wall to achieve the purpose of preventing arch arching and clearing. For example, a pneumatic piston vibrator uses a hammerhead to vibrate the outer surface of the silo wall; an electromagnetic vibrator is similar to the vibrator, and both of them vibrate perpendicular to the silo wall; the eccentric rotary vibrator has a complicated structure, and it is an eccentric block that rotates at a high speed. The generated inertial force is transmitted to the wall of the chamber to cause vibration, and its amplitude is small and the frequency is high compared with other types of vibrators. Direct vibration of the material in the silo means that the silo material is stirred to make it have better fluidity, or the force in a certain direction of the arched material is broken. For example, the vibrating unloader can not only break the arch through vibration, but also adjust the material discharge amount by changing the working parameters within a certain range. It should be noted that when the mechanical vibration method is used to break the arch, the vibrator is preferably interlocked with the silo gate or the feeder so that the vibrator only works when the gate is opened. If the vibrator is working when the gate is closed, the material in the lower part of the silo may become more compact due to vibration, making it more difficult to get out of the warehouse. (1) Pneumatic piston vibration breaking arch The pneumatic piston vibrator uses compressed air to push the piston (hammer) to vibrate the wall. The working principle is that there is a piston in the vibrator, and there is an air guiding hole inside the piston. When the compressed air enters, the piston conducts air to one end to generate thrust, and pushes the cylinder to the other end, so that the position of the piston air guiding hole and the body is changed. The piston reciprocates in the body and transmits vibrational force through the body. When the piston is running, there is a certain amount of compressed air at each end. So the piston does not directly hit the body. The form is simple in structure, convenient to use, and low in price, but the generated slamming force is limited, and the damper wall will also damage the silo, thereby affecting the service life of the silo. (2) electromagnetic vibration to break the arch The electromagnetic vibrator uses the generated electromagnetic force as power. The armature and the hammer head are integrated into one body. After the excitation coil is energized, the armature is sucked toward the iron core, and the hammer head vibrates the wall. After the power is turned off, the hammer is reset by gravity or spring. Similar to the pneumatic piston vibrator, both of them vibrate perpendicular to the wall of the silo, and the stress on the silo wall is better, but there are also problems of vibratory force and noise. (3) Eccentric rotating vibration to break the arch The electric control eccentric rotary vibrator vibrates the wall with the centrifugal force generated by the rotation of the motor shaft by the eccentric block mounted on the double shaft of the motor. The vibrator has a large shocking force and is adjustable, and the arching effect is good, but the noise generated is large. The pneumatically controlled eccentric rotating vibrator utilizes the high speed movement of the steel ball in the circular orbit to generate the slamming force. The main disadvantage of this type of vibrator is that the vibration force has a certain influence on the structure of the warehouse material, and it is possible to crack the wall of the warehouse; for the warehouse material with high toughness, the effect is not obvious; the wear and corrosion of the vibration plate is serious, and it is troublesome to replace it. . This method can be applied to a small-capacity conical funnel. (4) Shooting vibration method The blasting method is often used for blockages where the position of the clogging is higher than the ground. Gas inspection must be carried out in accordance with safety regulations before firing. The disadvantages of this method are poor safety, long preparation time, and many unsafe factors in the event of collapse of the funnel or destruction of the body. (5) Stirring broken arch A shaft with a spiral blade is arranged inside the silo, and is rotated by a motor reducer. The material is dropped to the discharge port by the rotation of the shaft with the spiral blades. 3, fluidization broken arch The perforated plate is built in the taper of the silo, and the perforated plate may be metal, plastic, ceramic, multi-layer metal mesh, felt and the like, and the size and quantity thereof may be selected according to actual conditions. The working principle is to ventilate the material when it is discharged, so that the material is fluidized near the discharge port to reduce the friction between the material and the inner wall of the silo, and to ventilate the silo during discharge to reduce the force between the particles and the particle to the warehouse. The effect of the inner wall is very effective, allowing the material to flow more smoothly. However, different compressed air pressures and air supply volumes are required for different materials. If the control is not good, the material may be excessively fluidized, and the result is that the material is uncontrollable from the discharge port of the silo. 4, the air arch (1) Pulse air breaking arch A row or rows of nozzles are arranged in an annular shape on the outer wall of the cone of the silo, and the compressed air enters the chamber through the electromagnetic valve and the filter nozzle, and then changes direction, and spreads along the silo wall, thereby cleaning the silo wall and causing the arched material to collapse. drop. If the setting is reasonable, the arching effect is better. Otherwise, due to the gas volume distribution, it is possible that some of the nozzles do not work and the effect of breaking the arch is not achieved. (2) Air clearing device broken arch The air clearing device breaks the arch by using the gas stored in the air bag to suddenly rush out and directly rush into the arching part of the material. The impact force generated by this sudden explosion overcomes the static friction of the material and makes the inside of the silo The material resumes flow. A—the air clogging device is in non-working state; b—the air damper is inflated; c—the air clogging device is in the state of jetting and arching (3) elastic air bag to break the arch The principle of the arching is to install the elastic air bag on the inner wall of the silo, which is easy to arch, intermittently inflating the air bag, and expanding the air bag (becoming hemispherical or rectangular), thereby applying thrust to the material to make the arch Collapsed. But this method of pushing has the potential to compact the material and instead form a more solid arch. (4) Air cannon arching method The air cannon arching is mainly to use the airflow generated by the sudden release of compressed air to form an impact and vibration on the material, so that the material is loosely dropped. Working process: open the control valve to inflate the gas storage tank of the broken arch, inflate to the pressure of the air source, stop the inflation, and immediately deflate the broken archer, and spray the nozzle to the coal arch to complete a broken arch process. Repeat the above process until the arch is broken. The device utilizes the instantaneous release of compressed air to produce blasting and cutting of the coal arch, and the arching effect depends on the gas flow rate, the working pressure, the nozzle diameter and the air flow resistance, and the normal working pressure is. The advantages are good cleaning effect, high degree of automation, and low maintenance workload, which not only reduces the labor intensity of workers, but also ensures production safety, and brings intangible economic benefits to enterprises and fertilizers. However, for some serious blockage accidents, the effect of the law is not obvious. The effect of the air cannon in the initial stage of installation is acceptable, but with the formation of the accumulation layer in the warehouse, the effect of pneumatic arching is getting worse and worse, and the final result is often the loss of arching effectiveness. Detonator blasting is used to eliminate clogging, which is too safe and affects the continuity of production. The air cannon arching device is a patented technology designed and developed by Nanjing Coal Mine Design and Research Institute. It has been widely used in storage bins, hoppers and pipelines of various industries. The arching structure is simple, the operating cost is low and the installation is convenient, and the system is composed. (5) pulsating wind breaking arch method On the basis of the wind breaking method, the method adds a quick-opening device in front of the nozzle to cause pulsating shock and vibration of the compressed air, thereby improving the effect of breaking the arch. The system consists of a pressure fan, a wind package, a total air duct, a branch air duct, a three-way control valve (or solenoid valve), a quick-opener, a nozzle, and the like. The method is widely used in metallurgy, coal and other industries. 5, hydraulic breaking arch method Use a special nozzle shaped like a fire extinguisher. When the inside of the chamber is blocked, insert the nozzle into the reserved hole and use the water pressure to break the arch. The effect of this method is very obvious, and it is mostly used in docks. Advantages: simple operation and low cost. Disadvantages: Increase the moisture of the warehouse material, affect the quality of the warehouse material, bring certain difficulty to the washing, and should not be promoted. 6, jitter lining broken arch An integral smooth material is built in the taper of the silo as the inner lining, and the inner lining is in direct contact with the material, and the compressed air or the cylinder vibrating inner lining is used to achieve the purpose of breaking the arch. This form is especially suitable for applications where the size of the silo is small and some materials are highly viscous. Due to the limited amplitude of the shake, the arching effect is poor for large-sized silos. Fourth, the typical broken arch device (1), LUFTATM silo breaking archer The LUFTATM silo breaker from Sweden is used to quickly and efficiently unload dry powder from a storage hopper, powder bin or other form of powder storage container. The LUFTATM silo archer achieves uniform flow of most powders through aeration and high-frequency vibration, which solves the bridging, smashing, rat holes and compaction of the powder in the flow. LUFTATM silo breaking mechanism works: it is mounted on the inner wall of various powder bins. The special material pad has excellent elasticity, wear resistance and fatigue resistance. When the air is introduced into the silo, it will flow along the silo wall to reduce the friction between the material in the silo and the silo wall. At the same time, the rubber mat will generate severe high-frequency vibration due to the introduction of air, completely destroying the accumulation or suspension generated by the material. The operation of the silo breaking device is not affected by the moisture content in the material or the pipeline. For some materials that are easy to absorb moisture, there are other effects that can not be compared with other flow aids. The fluidizer's built-in seals completely prevent powder from entering the pipe, ensuring that the fluidizer can be service-free for long periods of time. (B), the warehouse wall installed The damper installed in the silo wall is a mechanical, electromagnetic or pneumatic stunner to vibrate the silo wall, destroying the balance condition of the material arching, so that the material does not arch or the arched material is collapsed and Assist in material slippage. Due to the constant vibration of the silo wall, the silo will also be damaged, affecting the service life of the silo. (3), pneumatic flow aid The pneumatic flow aid is provided with a compressed air nozzle on the wall of the warehouse near the discharge port, and uses the jet kinetic energy to destroy the arch to remove the material retained in the warehouse. When adopting this method, because the gas content in the material is increased, it is often not required to be loaded at the time of loading, so that the utilization rate of the vehicle is reduced. When the elbow is loaded and unloaded, the dust is large, which increases the dust collection power. Therefore, the improvement and innovation of the anti-arch device is of vital importance to the enterprise to improve economic efficiency. (4), air cannon The application of air cannons in coal mine storage is more common. The air cannon uses compressed air with a working pressure of 0.4 to 0.8 MP a as the energy source. The air source pressure of the air cannon is considered to be 0.6 MPa. In actual use, the impact force is very large due to the different pressure of the air source. Differences should be appropriately increased or decreased according to the situation), stored in the accumulator, using a strong airflow of compressed air that is suddenly ejected, and directly rushing to store a part of the bulk material warehouse at a speed exceeding the speed of sound. A large impact is formed in a small range, releasing a large amount of energy. The sudden release of the compressed air expansion shock wave overcomes the resistance between the materials, and the portion of the release energy is selected to be in a position where the stagnation or blockage is prone to occur in the silo, so that the compacted or frozen material in the silo is restored to flow, thereby It can achieve the function of preventing plugging and clearing the flow of help. The air cannon must be produced by a specialized pressure vessel manufacturer, and must be approved by the labor department before it can be produced. (5), the bottom of the high education bulk machine In view of the problem that China's storage forms are mostly conical bottom bins, and the current warehouses are stored, the latest development and design of a library bottom education bulk machine. The prototype has been successfully tested and put into production. According to the theory that the plane symmetrical flow of the material is superior to the axis symmetrical flow, a cone is designed above the discharge opening of the vertical storage silo, and the cone is fixed on the cone wall in the vertical cylinder through the column. In this way, the annular material port between the wall and the cone can be regarded as a symmetrically symmetrical strip discharge port, and the axis-symmetrical flow is a plane-symmetrical flow, thereby improving the flow condition of the material in the silo. After the addition of the cone, there is a space under the cone to obtain a larger positive flow belt, which has a good effect on the discharge. At this time, the weight of the loose material acting on the discharge port is only the weight of the mass of the block between the discharge port and the cone, and the pressure is independent of the height of the material of the entire bin. Practice has also proved that after the addition of the cone, it can cause the overall flow in the silo and help eliminate the arching of the bulk material. The size of the cone and its position relative to the discharge opening of the silo are important parameters. Reasonably determining the size and position of the cone can avoid material arching between the cone and the silo and achieve an optimal positive flow belt. This study provides new ideas for silo anti-arching. Li Baoxin and others pointed out that it is also a very effective method to improve the flow of materials in the warehouse by mechanical aids in addition to the above devices. It can be used not only for new silos but also for retrofitting of old silos. At present, there are many methods used in actual production, which can improve the flow conditions of the materials in the warehouse to different degrees. For example, a circular umbrella-shaped insert is added at a position where clogging is likely to occur in the hopper, and the embedded body can be wear-resistant. The metal material is made, and the intermediate spiral chute and the outer spiral chute are used to achieve the purpose of breaking the arch. (6), a powder material anti-arching mixing device The utility model relates to a powder material anti-arching stirring device, which is characterized in that it comprises a rotating shaft extending radially through the bottom of the powder material bin, and the two ends of the rotating shaft outside the powder material bin are respectively An oil seal is disposed, the outer side of the oil seal is connected with a fastener by a bolt, and the firmware is connected to the rotating shaft through a bearing; one end of the rotating shaft is axially connected to a worm gear reducer through a flat key, and the worm gear reducer is connected An output end of the motor; three or more broken arch levers are radially connected after being fastened by the nut on the rotating shaft in the powder material bin. The utility model can not only solve or avoid the problems of agglomeration, adhesive material, bridging, rat hole, wall hanging and material breakage appearing in the coal powder bin, but also effectively prevent the coal powder in the coal powder bin from leaking out. The utility model can be widely applied to a powder supply system of a small and medium-sized industrial pulverized coal boiler or other storage and supply system. Overview With the rapid development of the machinery industry, the theory and technology research of material storage anti-arching is becoming more and more active. For example, the theory and technology of feed storage anti-arching are very prominent in the market economy. It is very urgent to research and develop new theory and new technology of storage anti-arching. The market outlook is very bright. Food safety issues have always touched the hearts of people in China and the world. The normative nature of food processing has become more and more concerned. The prevention of feed and the continuous supply of feed are prerequisites for food safety. Regarding the problem of warehouse material silencing, it has always been a worldwide research topic. Many scientific and technological workers have made long-term unremitting efforts to create a variety of warehouse structure forms and auxiliary measures suitable for material flow, so that the storage material flow conditions Great improvement has been made, but so far it cannot be said that this "stubborn disease" has been completely eradicated, and we need further research and efforts.
Phosphate Fertilizer is a fertilizer with phosphorus as the main nutrient. The full name of Phosphorus Fertilizer. Rational application of phosphate fertilizer can increase crop yield, improve crop quality, accelerate grain crops to promote fullness of seeds, promote flowering results of cotton, melons, solanaceous vegetables and fruit trees, increase the rate of results, and increase sugar content of sugar beets, sugar cane, watermelon, etc. The oil content of rapeseed.
1. Minimize contact with the soil, and concentrate fertilization, such as strip application and acupoint application.
2, try to increase the chance of contact with the root system
3, reduce the fixation by soil iron and aluminum
Zinc fertilizer and phosphorus fertilizer
When zinc Zn Zn fertilizer and phosphate fertilizer are mixed together, zinc phosphate which is not easily dissolved in water is formed. The roots of crops are difficult to absorb and utilize. Therefore, when applying Zinc Sulfate, it is necessary to avoid contact with phosphate fertilizers such as superphosphate, heavy superphosphate, diammonium phosphate and Potassium Dihydrogen Phosphate, and it is not possible to mix them together.
The application of zinc sulphate as a base fertilizer can be carried out by uniformly mixing zinc sulphate with farmyard manure, and then applying phosphate fertilizer when planting. It is also possible to uniformly apply the phosphate fertilizer to the farmyard manure as a base fertilizer, and then apply zinc sulfate when planting. This creates a barrier between the zinc fertilizer and the phosphate fertilizer to prevent them from coming into contact with each other.
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