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Introduction to the Direct Torque Control Technology of Motor Control The DTC technology originates from ABB and was patented in the mid-1980s. In 1995, ABB launched the first AC drive with direct torque control into the market, and at that time, DTC already held a leading position. Subsequently, with continuous improvements in aspects such as the computing power of processors, application programming, and communication interfaces, the performance of DTC has been continuously enhanced. Control principle: DTC directly controls the magnetic flux and torque of the motor, unlike AC vector drives and DC drives which control the motor current indirectly. It regards the motor and the inverter as an integrated whole. By using the spatial voltage vector analysis method, it calculates the magnetic flux and torque in real time within the stator coordinate system. It directly controls the torque through a Pulse Width Modulation (PWM) inverter, avoiding thecomplex processes of stator current decoupling and vector transformation.

A.Celli Paper has a long experience in paper and tissue paper machinery and equipment market, offering advanced solutions for complete turnkey plants, tissue machines, winders and rewinders for tissue, paper and cardboard, roll handling and packaging. With the acquisition of PMT (formerly Beloit) in 2020, the company becomes the leading player in the sector with a 100% Italian ownership, extending its range of products and services to the specialty paper, graphic paper and packaging paper industries. As the important role for paper automation ,Inomax VFD undertake important responsibility. With high speed maxmium up to 55000 rpm. high torque in low frequency,real 200% torque in 0hz. 100% energy feedback ,save electric power cost. low harmonic with THDI

According to the UN, water scarcity is one of the major challenges facing the world today and tomorrow. The need to find sustainable solutions for new freshwater supplies is urgent; solutions that take the straight road from saline to fresh water at low cost and with minimum impact on climate and nature.   With electricity accounting for some 50 percent of the operational costs of a desalination plant, energy efficiency and life cycle cost optimization are critical challenges for utilities and developers. Inomax regenerative variable speed drives lie at the heart of maximizing plant efficiency and productivity levels.   Inomax four quadrant regenerative solutions that return energy savings of up to 65% compared to traditional centrifugal pump systems without energy recovery devices and drives.  

To maximize production, your pulp and paper processes need to run reliably every single day. Inomax variable frequency drives (VFD) are designed to provide reliable control over the speed and torque of motors so that they can run according to the precise demands of your process. From pulp processing to paper, board and tissue machines, using ABB medium and low voltage drives and motors means more efficient energy use, cutting your operating costs.   Inomax is professional manufacturer for VFDs,produce high performance ,direct torque control frequency drives,low harmonic drives ,AFE drives, multi-module drive ,liquid cooling drives, from 220V-10KVA,0.75KW-50000KW.with the same technology than ABB and siemens ,mainly focus on the area which have high request for VFDs and need cost effective solution than ABB ans siemens.   Inomax VFD are widely application for Metallurgy,Steels, Cement, Chemical, Oil & Gas, Power, Polymer & Rubber, Pulp & Paper, Sugar, shipbuilding,Mining,flywheel energy storage,thermal power,hydropower.. Inomax not only provide frequency drives ,but also provide complete solutions include the electric cabinet design,built and working together with other related devices.   Distributors ,project partners and system Integrator are welcome to talk more details for cooperation.  

Textile machinery demands robustness and reliability of its components. Harsh ambient conditions such as high air humidity, dust and fibres require application specific cooling concepts and solutions – Our products are designed to meet these specific demands.   INOMAX ACS580 drive with special software for textile machines,Start and stop without reversal, higher energy efficiency, short acceleration time can reduce yarn breakage   To produce 20% more, to start with inomax drives!    

Whether your requirements are in municipal freshwater and wastewater treatment plants, desalination or irrigation plants, pumping stations or for water and wastewater networks, we have a full portfolio of variable frequency drives ,soft starters, motors for you to choose.   Your pumps and other motor driven applications all use energy. Optimizing those processes should be simple while making sure they function reliably. Our frequency drives with excellent application functionalities and features control water flow, pressure and level efficiently while reducing your energy bill.   Inomax’s medium voltage and low voltage AC drives have been widely used in municipal utilities, such as heat supply and HVAC applications, waterworks, and wastewater treatment plants. The company’s products and solutions offer high security and reliability, guaranteeing stable operation of municipal systems, and offering major energy savings.  

Inomax is one of the world’s largest suppliers of AC drives for air compressors and has a leading position in many markets around the world.   Inomax products are used by a variety of world-leading air compressor brands. The company offers comprehensive solutions for air compressors, including advanced synchronous and high-pressure air compressor solutions, as well as a range of bespoke tailored integrated air compressor drives. Inomax’s air compressor solutions combine the control and drive systems to enable energy-efficient, stable air compressor operations.

1 Introduction   　The frequency drive steel making process of Henan Yaxin Steelmaking Plant is complex, with many detection parameters and frequent equipment actions. The accuracy of process parameter detection and the level of automatic control are directly related to the quality and output of molten steel. For this reason, there must be a set of control systems with accurate and timely detection and a high level of automatic control in order to stabilize production and meet the needs of enterprise survival and development.   2　The load characteristics of frequency drive tilting   　　Steel making is to put molten iron and steel scrap from the blast furnace into the steel making furnace, through the process of oxidative decarburization and slagging, to reduce harmful elements, remove furnace gas and slag, and smelt molten steel that meets the requirements.   　　 There are currently three main steelmaking methods, namely, open hearth steelmaking, frequency drive steelmaking, and electric furnace steelmaking. Most of them use oxygen top-blown frequency drives for steelmaking. Its superiority is conducive to the automation of the production process.   2.1　The main equipment for oxygen top-blown frequency drive steelmaking is   (1) Raw material supply equipment: including the supply of molten iron scrap, bulk materials and ferroalloys; (2) The main equipment of the frequency drive: it is composed of the furnace body, the furnace body supporting device and the electric drive control system for the tilting of the furnace body, etc.; (3) Oxygen blowing device: When oxygen frequency drive steelmaking, large amount of oxygen is used, and timely oxygen supply is required, oxygen pressure is stable, and safe and reliable. Therefore, there must be a complete set of equipment to ensure oxygen supply to the frequency drive; (4) Flue gas purification treatment equipment; (5) Slag processing equipment, refining equipment outside the furnace, and ingot casting equipment.   According to process requirements, the tilting angle of the frequency drive is plus or minus 360°. The lower part of the furnace trunnion of the frequency drive is higher than the upper part, and the lower part is heavier than the upper part. It is designed according to a positive moment. Therefore, when the frequency drive electric control system fails or the brake force is insufficient, rely on the positive moment of the furnace body to ensure that the furnace mouth is upward, and no steel falling accident occurs.     When the frequency drive is working normally, if the molten steel needs to be dumped, the motor will output a positive torque to drive the frequency drive to tilt slowly. After the molten steel is poured, the furnace body needs to be returned to the normal position slowly. At this time, the potential energy of the frequency drive needs to be fed back to the system, and the motor is working in the feedback state.   2.2　frequency drive's requirements for the transmission system   　　Due to the characteristics of the frequency drive's technology and transmission technology, the frequency drive has high requirements on the transmission system: (1) The mechanical tilting frequency drive can continuously rotate 360°, and can accurately stop at any position, and should also have speed control performance according to process requirements. Its tilting position can have certain interlocking requirements with related equipment such as oxygen lances, ladle carts and smoke hoods; (2) During operation, there must be maximum safety and reliability. When a certain part of the electrical or mechanical failure occurs, the tilting machine should be able to continue to operate for a short time and maintain it until the end of the first furnace of steelmaking, even if the tilting machine occurs When the accident cannot be controlled, the furnace will not automatically tip over and cause a "steel down" accident; (3) Tilting machinery should have good flexibility to buffer shock loads and torsional vibrations caused by starting and braking. Another key equipment for frequency drive steelmaking is oxygen lance.   Oxygen lance is a typical potential load. As soon as the brake device is opened, the oxygen lance motor will immediately have a 100% load. When the oxygen lance is raised, the electromagnetic torque of the motor overcomes the load torque. The motor works in an electric state. When the oxygen lance descends, the load torque pulls the motor to rotate. The motor is working in the feedback braking state. Similar to the tilting control system, the oxygen lance transmission control system must also work in coordination with the brake device to prevent the phenomenon of "rolling", and it also has sufficient starting torque and overload capacity. And the speed can be adjusted. The frequency drive is generally equipped with two sets of oxygen lances, one set is working, and the other set is spare or overhauled.   The configuration of the frequency drive control system of the 3　 frequency frequency drive in the steelmaking plant of Sangang Company   　　According to the tilting of the frequency drive and the characteristics of the oxygen lance control system, the ACS880 series inverter of INOMAX was selected.   3.1 Technical characteristics of INOMAX ACS880 series inverter   The technical characteristics of INOMAX ACS880 series inverter are as follows, it is especially suitable for frequency drive control here:   By direct torque control technology, stator flux and torque are used as the main control variables. The combination of high-speed digital signal processor and advanced motor software model enables the state of the motor to be updated at 40,000 times/s. Since the motor state and the comparison value between the actual value and the given value are constantly updated, each switching state of the inverter is determined individually. This means that its drive system can produce the best combination of switches and respond quickly to dynamic changes such as load disturbances and instantaneous power failures. In DTC, there is no need for a PWM modulator that controls voltage and frequency separately. Therefore, there is no fixed chopping frequency. In actual operation, the high-frequency noise emitted by other inverters driving the motor will not be generated, and the power consumption of the inverter itself will also be reduced.   　　The standard built-in AC reactor significantly reduces the high-order harmonic content of the incoming power supply, greatly reduces the electromagnetic radiation of the inverter, and protects the rectifier diode and filter capacitor from the impact of voltage and current.   　　 Zero-speed full torque: The motor driven by ACS880 can obtain the rated torque of the motor at zero speed, and does not require the feedback of an optical encoder or a tachometer motor. The vector control inverter can only achieve full torque output when it is close to zero speed.   　　 The precise torque control provided by DTC enables ACS880 to provide a controllable and stable maximum starting torque. The maximum starting torque can reach 200% of the rated motor torque.   　　Automatic start: The automatic start characteristic of ACS880 exceeds the performance of flying start and integral start of general frequency frequency drive. Because ACS880 can measure the state of the motor within a few milliseconds, it can be started quickly within 0.48s under any condition. The vector control inverter needs to be greater than 2.2s.   　　In the flux optimization mode, the motor flux is automatically adapted to the load to improve efficiency and reduce motor noise. This is due to the optimization of the magnetic flux. Based on different loads, the total efficiency of the inverter and the motor can be increased by 1%-10%.   　　 Precise speed control: The dynamic speed error of ACS880 is 0.3%s in open-loop application and 0.1%s in closed-loop application. The vector control inverter is greater than 0.8%s in open loop and 0.3%s in closed loop. The static accuracy of the ACS880 frequency frequency drive is 0.01%.   Accurate torque control: The dynamic torque step response time can reach 1-5ms in open loop applications, while the vector control inverter needs 10-20ms in closed loop and 100-200ms in open loop.   The frequency drive capacity of the Helan Yaxin Steelmaking Plant is 100t, the tilting motors of the frequency drive are 4 sets of 90kW frequency conversion motors, and the oxygen lance motors are 2 sets of 75kW frequency conversion motors;   3.2 　 Tilting and oxygen lance control situation   (1) Tilting control   　　Usually, the tilting of the frequency drive is done by 3-4 motors, so in order for the system to work more reliably and stably, these motors must be load balanced, that is, all motors have the same output.   　　 Since these 4 motors are rigidly connected, the speeds of all motors are required to be absolutely synchronized. Therefore, the transmission of the 4 motors adopts master/slave control, and the 4 inverters are connected by optical fibers. Therefore, in the system configuration, one frequency frequency drive is used as the master, and it is used for speed adjustment and output torque setting, and other frequency frequency drives are used as slaves to follow the torque response of the master, as shown in Figure 2. Compared with the conventional control method, this use improves the performance of the system to a new level. Completely solve the phenomenon of "nodding" and "shaking the head" of the frequency drive caused by the asynchronous motor operation.   4 inverters can be switched between master and slave, but there can be only one master at the same time, and the other three are slaves. The master adopts speed control mode and the slave adopts torque control mode. The master sends control commands to the slaves. The slave accepts the start and stop commands from the host and the torque set value to act.   When a slave machine fails, it does not affect the communication and actions between the master and other slaves, so it can continue to run and wait for proper maintenance; when the master fails, the slave stops because it cannot receive the signal from the master At this time, one of the slaves is switched to the master, and the failed master is switched to the slave. After the switch is completed, the master sends a reset command to synchronize the signal, and the slave failure signal disappears. When the system is normal, continue to run. Wait until the appropriate time to overhaul the faulty equipment.   When the master is normal and 3 slaves report faults at the same time, it means that there is a problem in the communication. In order not to affect the normal production, all slaves are switched to the master at this time, that is, the 4 inverters are performing speed control at the same time. When available, check for communication problems immediately.   It should be noted that when inspecting and repairing the inverter, if other inverters are required to continue running at this time, since the optical fiber communication network has been disconnected after the inverter is powered off, other inverters cannot perform master/slave control and should be switched to The host can continue to run. After the overhaul is completed, switch to master/slave control mode.   　　 If a normal master/slave switch is performed, the slave will report a failure due to the temporary failure of the master signal. When the master/slave switch is completed, after the master sends a reset command, all alarm signals can be eliminated.   　　Because the frequency drive is a load with high starting torque, the starting method is a high torque starting method with constant excitation, and the stopping method is a ramp stop method. The braking chopper and braking resistor are used to absorb the energy returned.   In order to coordinate with the brake device accurately, when the speed of the inverter reaches absolute zero speed, the inverter outputs instructions to control the brake device, and the brake contactor is driven by the intermediate relay, and then the inverter stops the excitation, which can ensure The tilting device will not appear "rolling" phenomenon.   (2) Oxygen lance control   　　The key to oxygen lance control is that after the brake is opened, the motor must have a 100% load. For this reason, the transmission must output at least 150% torque at zero speed to prevent the oxygen lance from "slipping".   The direct torque control mode of the INOMAX inverter can provide up to 200% output torque at zero speed. Its dedicated lifting software has a torque memory function to memorize the starting torque required by the oxygen lance. Once the system is started, Just output the required torque to ensure the smooth operation of the oxygen lance.   　　 The brake interlock control function of the INOMAX lifting software ensures the safe operation of the system.   summary: Inomax drives is the idear choice for steel plant ,with better performance and more cost effective.

Generally speaking, the design of vessels with modern electric propulsion systems, either diesel electric, LNG electric or even fully electric, can be quite easily converted to a hybrid solution. In the best case, just by adding a parallel E-Storage system, a vessel can be operated utilizing battery power for example for peak power demand. In some cases, the optimum solution is to use DC power distribution instead of, or in conjunction with, traditional AC power distribution.   Inomax Drives’ solutions for the marine and offshore industry have the CCS certificates which gives you the best possible choice when selecting drives for your marine application.   Shaft generator for optimal propulsion with PTO/PTI Many long-haul vessels are still operating with direct diesel propulsion and no electric propulsion system at all. These vessels can improve efficiency and optimize main engine load power and emissions by adding a shaft generator/motor between the propeller and the main engine. This solution, called Power Take Out and Power Take In (PTO/PTI), is an electrical add-on which makes these vessels more efficient and even ready for hybridization. In hybrid vessels, a shaft generator/motor with AC-drive technology allows the optimum control of propulsion machinery at various speeds, which saves energy.   Overview of Shaft Generator System     What is a shaft generator system? The shaft generation system is a system that uses the ship's main engine drive shaft to drive the generator to generate electricity, which is used to provide electricity for the ship. Working principle: When the main engine is running, it is connected to the generator through the shaft, which converts the mechanical energy of the main engine into electrical energy to supply the ship's power needs. System Composition Main Generator: Generator connected to the main shaft, converting mechanical energy into electrical energy. Transmission System: Includes shafts, gearboxes and couplings to transmit mechanical energy. Control System: Monitors and regulates the power generation process to ensure stable and safe power output. Cooling System: Maintains the temperature of the generator and transmission system to ensure its normal operation. Auxiliary Equipment: Includes transformers, rectifiers and protection devices to optimize and protect the power system.     Inomax AC frequency drive Advantages and Applications        

Energy efficient reliability on board Anywhere a motor is used on board is a great opportunity to save energy. Our marine certified variable frequency drives (VFD) regulate the speed and torque of motors so they run accurately according to the demand. From propulsion systems, thrusters, deck machinery, pumps, HVAC systems, to deck cranes, Inomax medium and low voltage drives help you use fuel more efficiently and reduce maintenance needs.   Inomax AC drives are also key elements of your shaft generators and offshore pipe-laying systems. We provide global support, life cycle services and strong application expertise to help you get the full benefit from our drives. Equipment quality. Reliable operation. Fuel savings. Everything counts when you depend on your motor-driven applications to do what you expect.   Marine approved drives for variable speed control Saving energy and ensuring reliable operation of marine applications with ACS880 wall-mounted 440 V industrial drives  

The maritime industry is embarking on a transformation, steering away from traditional hydraulic winch mechanisms in favor of advanced electrically operated systems. The use of variable speed drives (VSDs), also known as variable frequency drives (VFDs) or, simply, drives, paired with high-efficiency electric motors is redefining all kinds of marine winch, including spooling winches, with a focus on energy efficiency, operational precision, and reliability. Inomax industrial drive is setting a new standard in the management of the ropes that are crucial for offshore and mooring vessels around the globe.   Moving from using mechanical transmission to electrical shaft transmission Mechanical spooling winches contend with a number of operational challenges. Mechanical and hydraulic power transmission systems face inherent inefficiencies, including wear and tear on the rotating parts that require synchronisation. The physical bulk and complex nature of their mechanical transmission includes wheels, gears and chains that makes them difficult to maintain and keep in sync. Inomax’s solution replaces the mechanical power shaft transmission with an integrated electronic synchro shaft functionality, similar to an electronic gear rather than mechanical gearing. This is made possible via the software built inside the ACS880 industrial drive that controls the motors of the main winch and spooler device. This approach allows for the electrical spooling device or motor to remain mechanically independent from the main winch, while maintaining precise synchronisation through the spooling software embedded in the drive. This ensures streamlined and safer management of ropes on offshore and mooring vessels, due to the integrated coordination between the main winch and spooler device. Process control and energy efficiency The traditional mechanical transmission spooling devices offer raw strength but lack the precision needed to adequately control the rope’s tension and position. This limitation and less controlled operation can result in ‘bird nesting,’ where ropes tangle and overlap, potentially damaging both the ropes and the winch and putting the safety of the equipment and crew at risk, especially with deep sea winches that has a long rope on the drum in multilayers. In addition, these systems, which involve chains, belts, and wheels, are large and cumbersome, requiring a lot of space. The wear and tear from their use can lead to uncontrolled spooling operations. These systems also present challenges in extreme weather conditions, such as arctic environments. Transitioning to electric winches powered by motors and drives has the potential to revolutionise maritime deck operations, and comes with a huge range of benefits. The precise control afforded by drives directly mitigates the risk of improper spooling. The drive’s ability to control the speed of the motor allows for careful management of winch speed and torque, ensuring smooth operation and protecting the ropes from undue stress and wear. Electric winch systems react quickly and precisely to operational commands, providing a big improvement on the slower response times that traditional mechanical transmission systems have. By using drives, electric winch systems can match energy consumption to actual demands. This not only prevents excessive energy use, but also promotes long-term operational cost savings and a marked reduction in the associated emissions. Tight side by side, and layer by layer for multilayer turn system on the drum Inomax has introduced a ready-made, innovative solution to address the challenges posed by traditional marine winch systems. The key feature of this solution is a ready-made AC drive application tailored for synchronised operations between the main winch drive and the spooler device. It facilitates direction changes effortlessly, filling one layer completely before advancing to the next, all while maintaining the desired fleet angle – this is essential for orderly and safe spooling.   The drive-based spooling control software provides a user-friendly interface, ready for configuration via a PC tool that simplifies parameter adjustments. Its diverse features and functionalities meet the varying needs of marine winch operations, including:     Manual and automatic modes: In manual mode, the operator manually controls the movement of the spooler to the left and right for servicing and inspection of the system. In automatic mode, the system automatically directs the spooler left and right in synchronisation with the rotation of the main drum. Direction change logic: In automatic mode, the system can seamlessly switch the spooler’s direction from left to right using discrete input sensors, actual position feedback from sensors. End-limit logic for both left and right sides, configurable via discrete input sensors or actual position feedback, to prevent the rope from overrunning the spooling area. This can be used in manual mode and automatic mode. If an end-limit switch sensor fails, a backup torque limit can be used to detect when the system is operating outside of its range and approaching a mechanical endpoint. Fleet angle support, which maintains a specified angle during spooling to ensure ropes lay tightly side by side without gaps or overlaps. This can be done with proximity sensors to define a permitted operating area. Options for referencing the main drum or the line reference with various inputs, such as encoders, PLC function blocks, analog inputs, or through Inomax’s high-speed drive-to-drive communication between ACS880 drives. Scalable parameters to match the gearing ratio between the main drum and the spooler device, allowing for optimised coordination and control. Support configurations for tracking or non-tracking gear mechanisms, accommodating either unidirectional or bidirectional gear arrangements. Thanks to this integrated software and the versatile functionality of the ACS880 marine drive, operators can expect significantly improved spooling accuracy and efficiency. The system’s ability to adapt to different operational modes, coupled with the support for extreme temperatures, translates to more reliable and safer marine winch operations, effectively mitigating common issues such as tangling and bird nesting.   Digital advantages The collaboration between dedicated drive software and PLCs is key to delivering advanced winch operations. This level of automation allows for sophisticated control strategies and real-time adjustments, ensuring operations are executed with accuracy and coordination. For example, the ACS880 drive software can regulate the layering of rope on the drum to prevent tangles and overlaps, while drives or PLCs can synchronise multiple winch drums for balanced load distribution, which is vital for complex lifting operations.   The drive software also facilitates adaptive programming, which helps maritime workers to customise operations to accommodate the unique demands of the vessel and the sea conditions. Through integrated diagnostics and monitoring, PLCs can also provide critical operational data as feedback, including load tension, motor speed, system temperature, and electrical current values, which allows for the analysis of the winch’s performance and condition in real-time.   This information is essential for implementing predictive maintenance strategies, as it enables the anticipation of potential maintenance needs based on actual usage and wear patterns, rather than on a predetermined schedule. This proactive approach better maintains the winch system’s reliability, cost-effectiveness, and lifespan.   Smarter setup with same technology for main winch and the spooling device Maritime operators also benefit from the user-friendly nature of electric winches with drives. The common hardware and software platforms standardise setup procedures, making troubleshooting and maintenance much more straightforward. Instead of having different parts and unique software for each type of winch, manufacturers can design a range of winches that use the same core components such as motors, drives, control units, and the software interfaces that operate them. This means that operators can use similar procedures to install, program, and repair multiple winch systems across their fleet.   This reduces the need for specialised setup and training, resulting in reduced engineering time and overall reductions in operational costs. Electric winching systems with fewer mechanical components also have fewer potential failure points, leading to lower maintenance requirements and better reliability. The added convenience of removable memory units for software simplifies the management of configurations and updates, further streamlining the setup and maintenance processes.   The integration of motor-drive systems and PLCs in marine spooling winch operations is ushering in a significant advance in maritime technology, enhancing precision, efficiency, and adaptability.   Through optimised energy consumption, refined operational control, and vastly improved safety, electric winch systems are now an asset for the modern maritime industry. As vessels continue to traverse the seas, the adoption of these advanced electric

The Rotary Kiln is very important and critical equipment in cement manufacturing process. At the same time it poses many challengesRotating a very large and heavy steel cylinder with material at low speed requires high torque. Also it consumes large amount of energy in theform of fuel and electricity among other equipment within cement plant. The speed control of rotary kiln is one of the critical factors for utilizing its production capacity, ensuring product quality, optimising fueconsumption, maintaining low running cost and meeting environmental standard. Precise speed control keeps kiln turning continuous andefficient.   Inomax offers a wide selection low voltage AC, medium voltage AC and DC drives which can accurately synchronize motor speed and torque. Our low voltage variable speed drives have Direct Torque Control (DTC) function which provides fast and accurate control for speed and torque event at zero speed. DTC doesn't need additional sensors to operate. Our global service network can provide skilled service quickly when needed.   Torque control, Accuracy. Efficiency. Everything counts with high quality clinker.   Highlights of Inomax AC drives   - Optimization of kiln speed and production flow - Minimized energy use - Maximized production volume - Minimized maintenance costs - Dynamic torque regulation - Reduced mechanical wear of the kiln drive and other equipment - High uptime - Equal distribution of load between two kiln motors   Inomax VFD also widely application for the whole cement production process ,such as   1.Crush and pre blending pile   - Conveyors - Crushers - Plate feeder - Stocker - Reclaimer   2.Dosing and milling   - Plate hoister - Mills - Conveyors - Raw material mill ID fan - Fans   3.Coal mill   - Conveyors - Crushers - Millings - Stocker - Reclaimer - Coal mill ID fan - Fans   4.Calcine   - Kiln head fan - Kiln end fan - Preheater high-temperature fan - Hoister - Rotary Kiln - The grate cooler - Fans - Pumps   5.Cement mill   - Bucket elevators - Conveyors - V-separator - Milling - Cement mill ID fan - Fans   6,Packing and transport - Cement bag packing - Conveyors