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Jiangsu Pengfei Group Co., Ltd. is one of the leading manufacturers of rotary kiln and grinding equipment in China and the global market. It will be listed on the main board of Hong Kong in 2019. The stock name and code: China Pengfei Group HK03348

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Major project

Congo 1500TPD cement production line

February 11,2020

How to Make Single Girder Crane Play Its Maximum Effectiveness

Waste incineration rotary kiln

February 11,2020

How to Make Single Girder Crane Play Its Maximum Effectiveness

December 17, 2019

Pengfei Nickel Mine Rotary Kiln Ships Indonesia Scene

Today, Jiangsu Pengfei has exported a batch of Indonesian nickel ore rotary kiln to the Fengshan Port for shipment. This shipment is part of the 18 nickel ore equipments invested by Deron Nickel in Indonesia. becoming the largest nickel project investor in Indonesia.

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Jiangsu Pengfei Group EPC project- Anhui wanwei annual output 2 million tons grinding station technical transformation

PFG180-140 roller press and ϕ4.2*13m cement mill are used in Anhui Wanwei Group Co., Ltd. The total investment of the project is about 47 million yuan. After the completion of the project, it is estimated that the output per hour of two mills in the grinding station will double, and the unit power consumption of cement products will decrease by more than 20%, which will greatly reduce the production cost and improve the competitiveness of wanwei cement market. Anhui wanwei high tech materials Co., Ltd. is the core enterprise of Wanwei Group Co., Ltd. (hereinafter referred to as wanwei group). The company has 6000 T / d clinker production lines, two 1000 t / d clinker production lines, four cement mills, an annual output of more than 3 million tons of cement and clinker, and an annual digestion of nearly one million tons of industrial waste residue. The main products are ordinary silicate 42.5 grade, 52.5 grade, composite silicate 32.5 grade cement and other varieties. Among them, composite cement is favored by the market because of its high workability, high strength, high durability and other characteristics. Under the premise of safe construction, Jiangsu Pengfei group strengthens process control, strictly follows the principle of "advanced, mature and high standard" from the whole process of project process design and complete set supply, strictly pays attention to construction quality and construction progress, ensures the expected transformation effect, builds the project into a high-quality project, strives to be completed and put into operation as soon as possible, and presents a gift to the 100th anniversary of the founding of the party.

Production process and main equipment of cement plant

Cement production method       The production process of cement is simply two grinding and one sintering, that is, raw materials are mined, crushed, ground and mixed to produce raw materials. Raw materials are fired at 1450 ~ C high temperature to produce clinker. Clinker is crushed and ground together with gypsum or other mixed materials to become cement. Due to the difference between dry and wet raw meal preparation, the production methods are divided into three types: wet process, semi dry process or semi wet process and dry process. 幻灯片3 Characteristics of wet process production            The raw meal is made into slurry with water content of 32% - 36%, which is dried and fired into clinker in rotary kiln. Wet preparation of slurry, grinding energy consumption is low, about 30%, slurry is easy to mix, raw meal composition is stable, conducive to firing high quality clinker. The unit heat consumption of clinker in rotary kiln is 2093 ~ 2931kt / kg (500-700kcal / kg) higher than that of dry process kiln. The temperature of clinker discharged from the kiln is lower, so it is not suitable to burn clinker with high silica and high alumina content. 幻灯片4 Characteristics of semi dry production            Semi dry process is called semi dry process when dry raw meal powder is made by adding 10% ~ 15% water into kiln. Rotary kiln with grate heater is also called lipol kiln and shaft kiln are produced by semi dry process. In foreign countries, there is a kind of slurry prepared by wet method, which is pressed and dehydrated by mechanical method, and then made into mud section with water content of about 19%, and then calcined in lipol kiln, which is called semi wet process production. The moisture content of raw materials in semi dry process is reduced, and the unit heat consumption of clinker can also be reduced by 837 ~ 1675kj / kg (200 ~ 400kcal / kg) compared with that of wet process. Because the grate heater is used to replace part of the rotary kiln to dry the material ball, the rotary kiln can be shortened. For example, the unit volume output of the kiln can be increased by 2-3 times. However, the semi dry process requires that the raw meal should have a certain plasticity to form balls, so its application is limited to a certain extent. There are many mechanical failures in the heating machine. In China, the calcination temperature is generally low, so it is not suitable to burn high-quality clinker. 幻灯片5 Characteristics of dry production         In dry process, the raw meal powder is directly sent into the kiln for calcination, and the moisture content of the raw meal entering the kiln is generally only 1% ~ 2%, which saves a lot of heat needed for drying raw meal. In the past, hollow rotary kiln was used in dry process production, and the heat transfer efficiency in kiln was low, especially in decomposition zone with high heat consumption, so the thermal efficiency of dry process hollow kiln was not improved much. The raw meal powder prepared by dry method is not easy to mix evenly, which affects the quality of clinker. Therefore, wet process production was dominant in the 1940s-1950s. In the 1950s, the air stirring technology and suspension preheating technology of raw meal powder appeared. In the early 1970s, the pre decomposition technology, raw material pre homogenization and raw meal quality control technology were born. Now dry process production can completely prepare raw meal with uniform quality. The new precalciner kiln has moved the preheating of raw meal powder and decomposition of carbonate to the external suspension state of kiln, which has high thermal efficiency, reduces the load of rotary kiln, and not only reduces the heat consumption, but also increases the thermal efficiency of rotary kiln from 30% to 60% of wet kiln, and expands the production capacity of kiln. 幻灯片6 Main process flow of cement plant The cement production process is mainly divided into three stages: raw material preparation, clinker burning and cement grinding. Taking dry process production as an example, it includes the following main processes:  crushing and pre homogenizing raw meal- preparation raw meal homogenization -preheating decomposition cement clinker- firing cement grinding- cement packaging 幻灯片7 1.Crushing and pre homogenization (1)In the production process of crushed cement, most raw materials need to be crushed, such as limestone, clay, iron ore and coal. (2)Raw material pre homogenization technology is to use scientific stacking technology to realize the preliminary homogenization of raw materials in the process of storage and taking of raw materials, so that the raw material yard has the function of storage and homogenization at the same time. 幻灯片8 2.Raw meal preparation          In the process of cement production, at least 3 tons of materials (including various raw materials, fuel, clinker, mixture and gypsum) should be ground for each ton of Portland cement production. According to statistics, the power consumed by grinding of dry process cement production line accounts for more than 60% of the total power, in which raw material grinding accounts for more than 30%, coal mill accounts for about 3%, and cement grinding accounts for about 40%. Therefore, reasonable selection of grinding equipment and process flow, optimization of process parameters, correct operation and control of operation system are of great significance to ensure product quality and reduce energy consumption. 幻灯片9 3.Raw meal homogenization           In the production process of new dry process cement, stabilizing the composition of raw material into the pit is the premise of stabilizing the thermal system of clinker burning, and the homogenization system of raw meal plays the last key role in stabilizing the composition of raw material entering the pit. 幻灯片10 4.Preheat decomposition           The preheating and partial decomposition of raw meal are completed by preheater instead of part of rotary kiln function, so as to shorten the length of return kiln, at the same time, the heat exchange process of gas in the kiln is carried out in the state of internal suspension of preheater, so that the raw meal can be fully mixed with the hot gas discharged from the kiln, thus increasing the contact area of gas and material, fast heat transfer speed and high heat exchange efficiency To improve the production efficiency of kiln system and reduce the heat consumption of clinker. (1) Material dispersion (2) gas solid separation (3) pre decomposition 幻灯片11 5.Sintering of cement clinker           After the raw meal is preheated and pre decomposed in the cyclone preheater, the next process is to enter the rotary kiln for clinker burning. In the rotary kiln, the carbonate is further decomposed rapidly and a series of solid-state reactions take place, resulting in the formation of other minerals in cement clinker. With the increase of material temperature, some minerals will become liquid phase and dissolve in liquid phase to produce a large amount of clinker. After the clinker is fired, the temperature begins to decrease. Finally, the cement clinker cooler cools the high temperature clinker discharged from the rotary kiln to the temperature that the downstream transportation, storage and cement grinding can bear. At the same time, the sensible heat of high-temperature clinker is recovered to improve the thermal efficiency and clinker quality of the system. 幻灯片12 6.Cement grinding        Cement grinding is the final process of cement production line manufacturing, and also the most power consuming process. Its main function is to grind the cement clinker (and gelling agent, performance regulating material, etc.) to the appropriate particle size (expressed by fineness, specific surface area, etc.), form a certain particle gradation, increase its hydration area, accelerate the hydration speed, and meet the requirements of setting and hardening of cement paste. 幻灯片13 7.Cement packing       There are two ways of cement delivery, bagged and bulk.   幻灯片14 Cement production equipment 1.Cement kiln system         Cement kiln is the main equipment of cement plant. The whole process of burning clinker from raw material is completed in the kiln. The simplest rotary kiln is dry hollow kiln. The raw material powder is added from the kiln tail, and the pulverized coal is injected from the kiln head with primary air and burned in the kiln. The flame temperature here reaches 1800-2000 ℃. The raw material continuously flows to the kiln head in the kiln, and the humidity gradually increases. After drying, dehydration, preheating and decomposition, the liquid phase appears when it reaches about 1300 ° C, then it rises to 1450 ° C under the flame, and then it cools to 1300 ~ 1100 ℃ to leave the rotary kiln and fall into the single barrel cooler. When it is cooled to about 100-150 ℃, it is unloaded to the clinker conveyor and transported to the clinker crusher, and then stored in storage after crushing. 幻灯片15 2.Rotary kiln system                      The rotary kiln is a cylinder made of steel plate and lined with refractory bricks. It is supported by the wheel belt on the loading shell and the supporting wheel below. It is driven by the big gear ring installed on the kiln body. The rotary kiln is usually placed at a slope of 3.5%, the speed is generally within 1 rpm, and the new dry process kiln can reach more than 3 rpm. The single drum cooler is similar to the kiln in that it is equipped with a lifting plate to speed up the clinker cooling. The temperature of the cylinder in the high temperature zone of kiln head is too high. It was cooled by water before, but now it is cooled by air. the above-mentioned dry process hollow kiln is the basic kiln type. Other kiln types mainly change the structure and type of drying, preheating and decomposition parts at the rear, and change the clinker cooler. 幻灯片16 3.Cement grinding station          If the process of cement production equipment is regarded as a complete process system, the final product is cement and the clinker is semi-finished product. Therefore, the system can be separated. The process from raw material excavation to clinker production is one stage, and the second stage is cement made from clinker and shipment and delivery. In general, these two sections should be put together, so as to occupy less land, facilitate management, use less labor, and can be completely centralized control. However, in some special cases, separation is more advantageous. 幻灯片17 4.Grinding system            Ball mill is the earliest grinding equipment used in cement production industry, and it still plays a leading role. Although its efficiency is very low, for example, the power consumption of single particle is only 6% - 9%, the maintenance of ball mill is simple and reliable, especially for cement clinker grinding. The shape and gradation of product particles are appropriate, and the performance of cement is good. It is difficult to find equipment that can completely replace it. 幻灯片18 一:Raw meal preparation l 1.Limestone plate feeder l It is located in limestone crushing workshop l Application for limestone feeding  l 2.Limestone crusher l It is used for crushing limestone l It is located in limestone crushing workshop of the plant l Crushing type single stage hammer type (pcf20.18) l 3.Limestone blending stacker reclaimer   幻灯片19 二:Raw material grinding Ball mill   幻灯片20 Vertical mill   幻灯片21 4. Roller mill 5.Bag dust collector at kiln tail     Specification and model outdoor type It is used for collecting raw material powder from waste gas of kiln tail and raw material mill It is located behind the humidifier tower and raw material mill 6.Exhaust fan of bag dust collector at kiln tail   Application for waste gas treatment of kiln tail and raw material mill system  The layout is located after the bag dust collection at the kiln tail   Normal working air temperature: 80 ~ 150 ℃, limit temperature: 200 ℃ 7.High temperature fan at kiln tail   It is used to extract exhaust gas from preheater   The layout is located behind the preheater and the humidification tower  Normal temperature of working air temperature: 320 ~ 350 ℃;   Limit temperature: 450 ℃;   Fan blades should be made of high-quality wear-resistant materials to ensure long service life of rotor blades. 8.Circulating fan of raw material mill   Used for ventilation of raw material mill system   The arrangement position is behind the combined cyclone of raw material mill    Normal working air temperature: 90 ~ 100 ℃ limit temperature (short time): 250 ℃   Fan blades should be made of high-quality wear-resistant materials to ensure long service life of rotor blades. 幻灯片22 三:Clinker firing Calciner   幻灯片23  Preheater                    The preheating and partial decomposition of raw meal are completed by preheater instead of part of rotary kiln function, so as to shorten the length of return kiln, at the same time, the heat exchange process of gas in the kiln is carried out in the state of internal suspension of preheater, so that the raw meal can be fully mixed with the hot gas discharged from the kiln, thus increasing the contact area of gas and material, fast heat transfer speed and high heat exchange efficiency To improve the production efficiency of kiln system and reduce the heat consumption of clinker. 幻灯片24   幻灯片25 9.Storage bucket elevator   Usage: raw material storage (outdoor type with head maintenance platform)  10.Kiln feeding bucket elevator   Purpose raw material into preheater (outdoor type with head maintenance platform)  11.Rotary kiln  12. Grate Cooler  13.Grate cooler cooling fan   Purpose and location: it is used to supply air for exhaust gas of grate cooler, which is arranged around grate cooler  14.Electric dust collector at kiln head   It is used for residual air treatment of grate cooler at kiln head   The layout is located behind the cooler and in front of the electric dust collector and exhaust fan at the kiln head  15.Electric dust collector and exhaust fan at kiln head   It is used to drain the waste gas of cooling machine after purification by electric dust collector   The layout is located behind the kiln head cooler and electric dust collector   Normal working air temperature: 200 ~ 250 ℃, maximum (short time): 400 ℃   Fan blades should be made of high-quality wear-resistant materials to ensure long service life of rotor blades. 16. Clinker chain bucket conveyor 幻灯片26  四:Cement grinding 17Cement grinding station 18Separator  

Successful ignition of Shanxi Jintou Xiagong 1000t / D active lime which main equipment supplied by Pengfei Group

On December 28, the main equipment of 1000 TPD high calcium active lime rotary kiln production line manufactured by Jiangsu Pengfei group was successfully ignited. In this project, Pengfei group manufactured, installed and commissioned Φ 4.88 × 70m rotary kiln , Φ 14.5 × 4.26m vertical preheater and 5.2 × 5.5 × 10.3m vertical cooler. In November 2019, the equipment has been transported to the construction site in batches and at the same time, company's technicians were also doing the installation and guidance.Finally,they fulfilled the equipment operation debugging and standard production test. The project adopts advanced production technology and equipment, strictly implements national industrial and environmental protection policies, and adheres to energy conservation and green development. During the construction period, the company and Jintou Xiagong building materials Co., Ltd. cooperated with each other, organized carefully, and carried out safe and civilized construction to ensure the implementation of the construction schedule and the quality of the project. At the ignition ceremony, Jintou Xiagong building materials Co., Ltd. expressed sincere thanks to Pengfei group for the main equipment of lime rotary kiln and supporting preheater, cooler and other main equipment.Besides, they were very satisfied with the high-quality installation guidance and praised the warm service of Pengfei group! Pengfei's products are exported to more than 70 countries and regions in the world. At present, through technological innovation, it expands the application of rotary kiln in the field of lime, which plays an important role in energy conservation, emission reduction and circular economy. In November 2020, the national standard research meeting of "technical requirements for complete sets of equipment for lime calcination" was held in Pengfei group. Pengfei group, as the leader unit of national standard formulation for lime rotary kiln, takes the lead in organizing standard formulation and research. Now it solicits opinions from all relevant units in the country. After passing the expert review meeting, it will be issued and implemented according to the approval procedure.  

Jiangsu Pengfei group was approved as a national post doctoral research station

On December 6, according to the Jiangsu provincial human resources and social security department, Jiangsu Pengfei Group Co., Ltd. was listed in the new national post doctoral research stations in 2020, which is another great honor since the company was awarded the national enterprise technology center in 2016 and the national manufacturing industry single champion of the Ministry of industry in 2017. This will attract more high-end young talents to focus on Pengfei, stimulate the company's innovation vitality and improve the company's competitiveness in the international and domestic markets. On the one hand,pengfei group fully gets use of company's advantages in providing customized one-stop solutions for design, procurement, construction and trial operation as an EPC service supplier, technology and brand advantages of rotary kiln system and grinding equipment, consolidate the traditional market and constantly expand the emerging market. We will promote innovation of enterprises, further improve the construction of technological innovation system, promote the combination of industry, University, research and application, increase technological transformation and upgrading, and overcome the bottleneck of research of major projects.  

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