#vertical mill

If you work with metal, specifically fabricating and shaping metal into different formats, you often use precision tools with this process. Probably the most common pieces can be a vertical milling machine. It was created to work all around, letting you alter the metal you are working with in different ways. There exists one operator that will be completely control of the whole system, dealing with individual pieces, or you may even use a fully automated system that may do that autonomously. This is how you can operate a vertical mill and in addition find one discounted.

How Would You Choose One Vertical Mill On The Market?

Looking for a vertical mill that is certainly for sale is very easy. That is due to the distribution of your systems that the number of manufacturers there are in the world. To get super fine calcium carbonate powder, you will need most of these machines. The calcium carbonate vertical mill could very well be probably the most prominent of them all and in addition one of the easiest to utilize. The vertical mill plant can work automatically and only a few workers are needed to monitor the working process. These automatic appliances will definitely cost additional money, nonetheless they can accelerate the procedure through which you are completing projects for your personal clients.

The Way It Operates

There are several tips of Ultrafine Calcium Carbonate Vertical Mill process. First, you need to make sure there is no residue inside the milling machine. Or else, the machine may break down due to excessive pressure. Second, watch out the sequence of machines before starton and shutdown. Turn on the conveying system, milling machine, then, feeding machine. And turn off those machine in an adverse order. Third, feed materials into grinder evenly so that the materials won't block the feed port. Also, this keeps grinder at a best efficiency.

The Easiest Way To Get One On Sale

To find one that is presently on sale, you require only find a Ultrafine Vertical Calcite Grinding Mill online. You will observe many listings for them, some of which will be very expensive, yet there will be many that can be affordably priced. You should directly contact the company of each of these products for additional details on them as well as determine whether any deals are currently happening. By doing so, it is possible to quickly obtain one to get a reasonable cost that may likely provide you with numerous years of use.

Product introduction:https://www.lvssn.com/mill/290.html

As the main equipment of cement enterprises, vertical mill directly affects the efficiency of the enterprise, and its inspection and maintenance is very important. This article talks about the parts and methods of inspection and maintenance in combination with production practice.

First, the location and method of vertical grinding inspection

Vertical mill consists of its power, transmission, lubrication, powder selection, feeding pipeline, inlet and outlet ducts, sealing, discharge mechanism and mainframe. The system is huge and complex, and the inspection and maintenance tasks are heavy. It must be checked one by one and no dead ends. Briefly read as follows:

Power check

The power mainly refers to the main and auxiliary motors of the vertical mill. The contents of the inspection include whether the motor grounding is loose, and the problem is promptly tightened. Whether the position switch of the auxiliary motor is normal; whether the various types of shields are loose and friction; whether the motor vibration, noise, temperature rise, current, voltage, etc. are normal; whether the motor lubrication is normal, the oil pressure of the oil station, the oil supply temperature, the cooling water volume, and the Whether the outlet temperature is normal, whether the oil level of the oil station and the pressure difference of the oil filter are normal. If there is a problem, analyze the cause and symptomatic treatment.

2. Inspection and maintenance of transmission parts

The transmission section includes a coupling, a reducer and a petrol station that serves it. The inspection of the oil station part includes whether the oil level is lacking, whether the pressure is normal, whether the oil return, oil supply, fuel tank temperature is normal, whether there is oil leakage or oil leakage, and whether the oil passes through the oil pipe temperature, and whether the oil pressure difference is normal. Whether the cooling water volume and water temperature are normal, and whether the water temperature in and out of the cooler is normal. Also check the operation of the oil pump of the petrol station, such as vibration and noise. Regarding the coupling, it is mainly checked whether there is friction with the shield, whether there is a bolt break or other abnormal sound. The reducer is the focus of the inspection. It is necessary to hear whether the internal bearing and the gear meshing sound are even. It is necessary to test whether the vibration of each part is abnormal, whether the temperature of each detection point is normal, and whether the foot is loose. If an abnormality is found, it must be analyzed and processed. Here, the fault position can be determined by comparing the rotational speed of each shaft with the sound and vibration frequency. Check the oil supply pipe and the fuselage for oil leakage.

3. Grinding part of the grinding part of the inspection

Grinding parts include a pressurizing station, a grinding roll, a grinding disc and its support. The inspection of this part first checks whether the pressure station and its pipeline are normal, whether the accumulator is normal, whether the hydraulic cylinder has dripping oil, whether the hinge connection of the hydraulic cylinder is abnormal, whether there is abnormal noise or abnormal impact. Check whether the grinding roller support rotation is abnormal, whether the fastening bolt and the gland are loose, whether the lubrication of each joint bearing is in place, whether the hydraulic rod seal, the hydraulic rod connecting piece is abnormal, whether the grinding body and the back seal are damaged, whether the casing has grinding or not. Wear is not normal. Listen to the internal sound and vibration.

4. Inspection of the wind mill connecting pipe

The pipeline around the mill mainly refers to the inlet and outlet ducts, the feeding and discharging pipelines. This area mainly checks whether the connecting bolts of the inlet and outlet pipes are loose, whether the soft connection damages the air leakage, whether the inlet and outlet pipes are worn, and whether the feeding and discharging mechanism is flexible and effective.

5. Inspection of the classifier

The separator is located at the top of the mill. It mainly checks whether the motor, reducer and coupling work normally. Is there any abnormality, noise, vibration and temperature rise? Listen to the internal sound of the separator is normal, whether there is friction block phenomenon.

6. Each platform channel check

Because the vertical mill is very large, the platform and stairs are more, and it is related to the safety of personnel and equipment. The inspection of the department should not be underestimated. It should be one of the important contents of the inspection. The main inspection, the support of the platform, whether the connection points are invalid, whether the railing is reliable, whether the pedals are desoldered, whether there are obstacles affecting the passage on the platform, whether there are unstable objects, whether there is a safety platform for heavy objects, etc.

7. Other aspects of inspection

Check whether there is any obstacle in the air inlet of the sealed fan, whether the filter is blocked, whether the fan is running normally, whether the pipe and the joint are leaking.

Second, the maintenance of vertical mill.

The maintenance of the vertical mill mainly refers to the handling of the general faults that can be seen and heard during the inspection. mainly includes:

Adjustment of pressure and temperature of each petrol station; adjustment of cooling water flow and temperature; tightening of oil, water and gas pipe fittings to eliminate dripping; inspection of oil station when oil level is insufficient, timely replenishment; When the support is loose, carry out reliability treatment; when the equipment is found to have oil pollution or other pollution, clean it in time to ensure the equipment is hygienic; timely block the air leakage of the equipment to reduce reactive power consumption; when there is crisis equipment and personal safety around the equipment When it is unstable, it should be removed in time. Lubricate the lubrication pipes of joint bearings and hinge joints in time to ensure lubrication. When the anchor bolts or other connectors are found to be loose, they should be tightened in time. and many more.

Regarding the problem that must be stopped during the inspection, the cause should be analyzed, the location of the fault should be judged, the treatment plan should be formulated, and the relevant management personnel or management department should be reported to wait for the shutdown. For major problems found, as well as the safety or personal safety of the crisis equipment, emergency on-site disposal should be carried out, and then reported to the management department to develop maintenance plans, repairs, and help expand the accident.

Product introduction:https://www.cementepc.net/grinding/50.html

1. General situation of equipment

Coal vertical mill, also known as medium speed coal mill, is suitable for grinding bituminous coal and lean coal and other medium hardness materials. It can be widely used in power, metallurgy, building materials, chemical and other industries, especially in blast furnace coal injection system, which needs a large number of bituminous coal. Because of its special technology and structure, the coal vertical mill has less dust and less noise in the production process, and the pulverized coal produced has high efficiency gradation and excellent combustion performance. The coal vertical mill has the advantages of simple process, compact equipment, stable pulverized coal fineness and uniform particle size.

The coal vertical mill is driven by motor and drives the mill disk to rotate through the planet reducer. The 2 / 4 rollers on the grinding disk rotate under the drive of the grinding disk. The raw coal coming in through the coal falling pipe is distributed on the grinding plate. Due to the action of hydraulic loading force, the large particle raw coal is crushed by extrusion between the grinding roller and the grinding disk. The small particle coal is crushed by the sliding friction produced by the relative movement of the roller and the grinding disk; while the raw coal is ground in the mill, the hot air (usually below 300 ℃) that passes into the vertical mill dries off the moisture of the raw coal to meet the requirements of the finished pulverized coal; the pulverized coal after grinding is transported into the separator through the primary air transportation. Separation. The qualified pulverized coal is transported to the pulverized coal bin, and the unqualified coarse pulverized coal is returned to the mill for re-grinding.

2. Common faults and causes analysis

2.1. Bearing chamber wear

The reason for the wear of the bearing chamber is that, in addition to the large stress, the main reason is that the metal characteristic of the material of the bearing chamber is determined, the metal is high in hardness, but poor in yield (which cannot be recovered after deformation), the impact resistance is poor, and the fatigue resistance is poor. So that the adhesion and wear, the fatigue wear, the fretting wear of the bearing outer ring and the bearing chamber can be easily caused.

2.2, bearing position wear

In the process of long-term operation of the equipment, the bearing temperature increases and bears the action of axial force and radial force at the same time, which leads to the matching clearance due to the interference size metal fatigue between the shaft and the bearing, which makes the relative motion between the bearing and the bearing position aggravate the wear. In addition, the quality problem of the bearing itself and the lubrication and maintenance are not in place in the process of use, which is also easy to cause bearing position wear.

2.3, roller body wear

The reason for the wear of grinding roll is generally due to the wear caused by the outer ring of roller skin for a long time, enterprises usually choose to surmount the roll sheet, and each surfacing welding will produce a slight deformation, the more times of surfacing welding, the thicker the surfacing thickness, the greater the deformation, so it is impossible to guarantee the arc of the circle, at the same time, there is also the influence of thermal stress, there is a small crack in the roll sheet, the more times, the thicker the surfacing thickness, the greater the deformation, so it is impossible to guarantee the roundness, at the same time, there is also the influence of thermal stress. The gap between the roll sheet and the roll body leads to the wear of the roll body, another reason is that in the process of operation and use of the equipment, due to the uneven material will appear radial impact on the grinding roll, resulting in large vibration is easy to bolt loosening, if not timely fastening bolts to maintain a good pre-tightening The force can easily lead to the insufficient pre-tightening force of the fastening bolt, which will lead to the matching gap between the body and the roller sheet, which will cause wear between the body and the roller sheet. of course, the failure of maintenance and repair is also the cause of this problem. The wear amount of the wear roller is not repaired in time, resulting in more and more wear until the roller surface is damaged and the equipment is shut down.

3. Comparison between traditional repair mode and field repair mode.

3.1, traditional repair model

in that case of the wear of the roll body of the grinding roll and the wear of the drive parts such as the bearing position and the bearing chamber, the traditional process is often used for machining after the repair welding, or the process of electroplating and the like is adopted, And the input manpower and material resources are relatively large. in addition, the thermal stress generated at the high temperature of the repair welding can not be completely eliminated, the material damage can be easily caused, cracks of the parts are caused, and the brush plating is limited by the thickness of the coating and is easy to be peeled off, and the above method is to repair the metal with the metal, and the matching relationship of the "hard-to-hard" cannot be changed, And can not reach 100% of the matching surface, and the comprehensive action of each force can be realized. Next, it will still cause another wear and tear.

3.2, site repair mode

Different repair schemes can be adopted according to different wear conditions. Polymer composites have good adhesion and mechanical properties, not only the strength and hardness of metals, but also their concessions. The application of polymer composites can be repaired without disassembly and machining, without the influence of welding thermal stress, and the repair thickness is not limited, which can ensure the repair accuracy and meet the installation requirements. The application technology of polymer composites can make the enterprise repair quickly and effectively in the first time, and the repair cost is lower than that of the traditional repair process. Generally, the amount of polymer composites can be calculated according to the wear amount, and then the repair cost can be calculated, and the repair cost can be effectively avoided. All kinds of time and economic losses, and the repair of polymer composites belongs to cold welding technology, there are no thermal stress and other problems, which can effectively avoid the secondary damage of the substrate.

4. Conclusion

Make full use of the comprehensive properties of composite materials, customize the targeted repair scheme and rigorous and scientific implementation repair scheme, change the traditional repair means of users, realize the repair difficult problems in the field for a short time, ensure the normal operation of the equipment, the process is simple, the cost is low, the production cost can be realized without large disassembly, and the reasonable control of production cost is realized. In addition to the above, Fushilan technical products have also been widely used in other equipment transmission parts of cement industry, such as wear, running leakage, heat exchange equipment cleaning and so on. It not only saves maintenance funds for enterprises, the most important thing is to save shutdown time for enterprises, but also save manpower and material resources.

Date：2017-11-17 11:44:59    Author：Chaoyang Heavy Machinery Manufacture Co., Ltd.

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