IntroductionAt present, cement enterprises mainly rely on the loading machine and manual stacking operation, although the domestic cement industry has also appeared automatic loading and stacking device, but due to a series of problems such as low production efficiency, still cannot meet the delivery demand. When loading cement bags, they will collide, emit dust and…
IntroductionAt present, DCS control system is widely used in cement industry, the system runs safely and reliably, and its central processing unit rarely fails. However, due to unreasonable design or improper use and maintenance, component quality problems or software failures, the power module, storage module, input and output module and peripheral lines, often make the…
01 Fault Analysis The model of coal mill induced draft fan of a company is W4-73-15NO19F, the air volume is 100000m³/h, the wind pressure is 2200Pa, the rated current is 28A, the design speed is 960r/min, the motor power is 250kW, and the actual operating current is 19 ~ 20A. The fan is generally stable…
01 Introduction A 4500t/d clinker cement production line of a company is equipped with a 9MW waste heat power station. The air ejector in the vacuum system of the steam turbine generator set is a water ejector, which mainly consists of 37kW water pump, 10.5kg/h air ejector and 12m³ water injection tank. The role of…
IntroductionA company’s 5000t/d cement clinker production line was completed and put into operation in 2008. In order to achieve the goal of ecological and environmental protection control, the company built a SNCR denitration system in 2012, and used ammonia water with a concentration of 20% to remove NOx formed in the cement kiln. SN-CR denitration…
Introduction A company’s 2500t/d new dry clinker production line was put into operation in 2004, and the equipment has been running steadily. However, in July 2014, the reducer of the raw mill separator suffered mechanical damage. After the replacement of the new reducer, the motor of the separator was burnt out for several times. After…
01 Existing problems The cement combined grinding system of a company is a “one drag two” coil flow process, the roller press is HFCG160×140, the mill is 3.2m×13m, ①3.0m×11m three mill each one, the main production of P•O42.5, P•S•A32.5 cement, the existing problems are: (1) Over grinding phenomenon is serious. In order to ground the…
01 problems Line 2 of a company’s raw material mill is FLSmidthATOX50 roller mill, which was put into use in July 2007. There are three rollers, each roller is equipped with a pull rod head, as shown in Figure 1. The A end is connected with the piston rod of the hydraulic cylinder through the…
01 Introduction The 2,000,000 t cement production line system of a company consists of two sets of ф4.2m×13m mills, and the supporting main reducers are JS150 products developed by a well-known gearbox company in China in the 1980s. Its main technical parameters are: input power 3550kW；; The input speed is 744r/min, the speed ratio is…
01 Process Status Quo In response to the national requirement of eliminating backward production capacity, a company reconstructed a set of combined grinding system consisting of CLM150-100 roller press and 3.8m×13m cement mill, with an annual output of 1.5 million tons of cement, which was put into operation in September 2014. The power of the…
