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2018 Vol. 0, No. 10
Published: 2018-09-28
7
Calculation of burnability index K1450 of raw meal and its influence factor research and application
Hot!
GUO Suihua, et al.
Burnability index K1450 of raw meal is a technical parameter which was proportional to the rate constant of C3S formation in clinker burning, and could be calculated based on chemical compositions of the raw meal doped with coal ash and free lime content in samples burnt at 1 450 ℃. Higher K1450 value means a better burnability of raw meal, and there were four factors having significant impacts on it, including coarse quartz and fluoride level in the raw meal, liquid quantity and alumina ratio in clinker design. The relative variation of heat consumption of clinker could be estimated very precisely in a plant based on K1450 values of raw meal. When K1450 was improved from 30 to 70, the heat consumption could be decreased by more than 10%. For a raw meal with good burnability (K1450>70), the clinker sintering could be realized with a quicker heating rate and less time required at the burning zone, while reducing conditions inside the kiln could also be reduced obviously, which were all contributing a lower heat consumption for clinker burning. With above conditions, the activity of the clinker could be improved remarkably by further optimization if reasonable sizes and morphologies of Alite have been obtained.
2018 Vol. 0 (10): 7- [
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1301
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14
Effect of coal powder injection proportion on NOx in NST precalciner
KE Shengqiang, et al.
NST precalciner was one of the most widely used in cement industry. The tertiary air duct of the precalciner was eccentrically cut into the cone of precalciner, two burners were staggered on the left and right sides of the tertiary duct. The tertiary air was unidirectional into the precalciner so that the two burners were in different O2 concentrations. More than 90% of the NOx in the precalciner was fuel-type NOx, O2 concentration was the main factor affecting the formation and distribution of fuel-type NOx. According to the structural characteristics of the precalciner and the formation mechanism of fuel-type NOx, this paper applied CFD software to numerically simulate the amount of coal used in two burners. The effect of different coal powder injection proportion on the formation and distribution of NOx in NST precalciner was analyzed. The simulation results provided theoretical basis for the operation mode and transformation direction of this type of precalciner to reduce NOx.
2018 Vol. 0 (10): 14- [
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405
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20
Discussion on some misunderstandings of cement industry at present
XIE Keping
2018 Vol. 0 (10): 20- [
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329
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23
Application and commissioning of LM56.3+3 vertical mill in finishing grinding system for cement in SPCC company in Saudi Arabia
Hot!
SHANG Jianping, et al
2018 Vol. 0 (10): 23- [
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416
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28
Problems and resolution of production transformation between cement and slag produced by vertical mill
ZHANG Yanshan
2018 Vol. 0 (10): 28- [
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325
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30
Application practice of modified powdery phosphogypsum
CHANG Qiaoping
2018 Vol. 0 (10): 30- [
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333
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32
Measures for increasing long-term strength of clinker
HE Wei, et al
2018 Vol. 0 (10): 32- [
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377
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35
Analysis for prolonged cement setting time
XU Mingjun
2018 Vol. 0 (10): 35- [
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696
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36
Measures for reducing water requirement for standard consistency
KANG Xi
2018 Vol. 0 (10): 36- [
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365
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38
Raw materials optimization of clinker for nuclear power station construction and key points of production control
SUN Lin, et al
2018 Vol. 0 (10): 38- [
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378
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41
Study on drawing and document management system in cement design process
TIAN Ying
2018 Vol. 0 (10): 41- [
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289
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44
Renovation of carbide slag drying system in cement plant
LU Bin, et al.
2018 Vol. 0 (10): 44- [
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323
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45
Upgrading and renovation of generic version FLSmidth SF type push bar grate cooler
JIA Baogui, et al.
2018 Vol. 0 (10): 45- [
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302
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47
Powder dynamics study of powder flow switch
CHEN Liming
2018 Vol. 0 (10): 47- [
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325
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51
Renovation of large-scale powdery material silo
WANG Xianghong, et al
2018 Vol. 0 (10): 51- [
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327
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53
Practice of ceramic grinding media used on super fine fly ash production
ZHANG Zhicun, et al
2018 Vol. 0 (10): 53- [
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374
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56
Analysis of kiln tyre guide roller fracture and its preventive measures
Hot!
BEN Daochun
2018 Vol. 0 (10): 56- [
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469
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59
Application of thermal imaging instrument on supervise of refractory in kiln
LI Xiongying, et al
2018 Vol. 0 (10): 59- [
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288
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61
Analysis of refractory fall-off in upper transition zone of kiln
SUN Shanwen/
2018 Vol. 0 (10): 61- [
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413
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62
Technological and economic analysis of SCR denitration technology in cement industry
Hot!
ZHOU Rong, et al.
2018 Vol. 0 (10): 62- [
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327
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67
Application of EDI technology in chemical water treatment of cement kiln waste heat power station
LI Lin, et al.
2018 Vol. 0 (10): 67- [
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283
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69
Validation and comprehensive evaluation of domestic laser particle size tester
WANG Tao, et al.
2018 Vol. 0 (10): 69- [
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280
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72
Integrated control technology analysis for medium voltage power supply system of Gezhouba cement
FU Jinqiang, et al
2018 Vol. 0 (10): 72- [
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337
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75
Renovation of pulverized coal rotor scale
LI Fang, et al.
2018 Vol. 0 (10): 75- [
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514
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77
Renovation of water supply system of chemical water workshop in waste heat power generation system
WU Honglei, et al
2018 Vol. 0 (10): 77- [
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307
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78
Vacuum system energy saving renovation of deaerator in waste heat power generation system
ZHAO Feng
2018 Vol. 0 (10): 78- [
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352
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79
Energy saving renovation of chain conveyor for dust return after bag house at cooler
JI Zhongquan, et al
2018 Vol. 0 (10): 79- [
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448
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80
Application of compressed air sweeper for belt conveyor
SHANG Yihua, et al
2018 Vol. 0 (10): 80- [
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406
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