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2024 Vol. 0, No. 06
Published: 2024-06-10
1
Study on properties of nano- SiO2 activated phosphorous slag cement
LI Jie, et al
The accumulation of a large amount of phosphorus slag has seriously polluted the environment. Its application in concrete materials can realize the utilization of solid waste, but the phosphorus slag will seriously reduce the strength of cement. Therefore, introducing the nano-SiO2 into phosphorus slag concrete can realize the application of phosphorus slag resources and achieve energy saving and emission reduction. The study found that as the phosphorus slag content increases (dosage 10%, 20% and 30%), the early strength of cement mortar is greatly affected, and the strength is significantly reduced. Nano- SiO2 particles are added according to 0.5%, 1.0%, 2.0%, 4.0% and 8.0% of the cement dosage. When the content is no more than 4.0%, the water consumption of normal consistency and setting time of phosphorus slag cement are continuously reduced, and the strength is improved to some extent. However, when the dosage reaches 8.0%, the water consumption of normal consistency and setting time of phosphorus slag cement increase, and the corresponding strength decreases. Therefore, the reasonable introduction of nano-SiO2 particles can effectively improve the activity of phosphorus slag cementing materials, improve the consumption of solid waste resources, and contribute to environmental protection and resource social development
2024 Vol. 0 (06): 1- [
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6
Quantitative study on leaching amount of water-soluble chromium (Ⅵ) in cement clinker and total chromium content in clinker
CHEN Shiqi, et al
This article uses data statistical methods to analyze the leaching amount of water-soluble chromium (Ⅵ) and total chromium content in clinker. The results showed that the total chromium content of cement clinker had no obvious change when a small amount of contaminated soil or hazardous waste was added, but the leaching amount of water-soluble chromium (VI) of cement clinker had obvious change. Further study found that the leaching rate of water-soluble chromium (Ⅵ) in clinker presented a stable negative correlation with the total chromium content of clinker, which was closely related to the kiln process parameters besides the influence of raw materials into the kiln, and the kiln process parameters were the main influencing factors of the correlation. Subsequent verification tests showed that the leaching amount of water-soluble chromium (Ⅵ) in clinker can be effectively reduced by reducing the total chromium content of raw materials into kiln under the condition that kiln process parameters remained unchanged
2024 Vol. 0 (06): 6- [
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43
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10
Study on characteristics of hydraulic concrete admixture and hydration mechanism of limestone powder
ZHANG Zheng, et al
By using scanning electron microscopy, X-ray diffraction, mercury intrusion and other testing methods, the mineral composition and surface characteristics of three admixtures (limestone powder, fly ash, and ground granulated blast furnace slag) commonly used in hydraulic concrete were studied, and the hydration mechanism of binary and ternary cementitious material systems was studied. The results showed that the surface of limestone powder particles was rough, which could promote the early hydration of cement, weakly participate in the reaction and generate hydrated carbon calcium aluminates, but it had no volcanic ash activity. The limestone powder has a greater impact on the pores in the range of 20~100 nm in cement stone. As the content of limestone powder increases, the pores in this range increase and the pore structure of hardened paste gets worse. Fly ash contains a large number of spherical particles, the surface of the particles is dense and smooth, and it contains a large number of vitreous bodies. The pozzolanic effect of fly ash can optimize the pore structure of slurry by combining fly ash with limestone powder
2024 Vol. 0 (06): 10- [
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14
Practical study on effect of waste textile as alternative fuel on cement kiln system
Hot!
LI Ao, et al.
2024 Vol. 0 (06): 14- [
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72
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17
Production practice of FRP scrap as alternative fuel
SHANG Yinming
2024 Vol. 0 (06): 17- [
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36
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21
Production practice of FRP scrap as alternative fuel
SHANG Yinming
2024 Vol. 0 (06): 21- [
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58
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24
Research and practice of bypass ash washing technology
WEI Baiyong, et al.
2024 Vol. 0 (06): 24- [
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50
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27
Approach of co-processing of municipal sludge by cement kilns under dual carbon background
REN Mingzheng, et al
2024 Vol. 0 (06): 27- [
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54
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30
Practice of producing cement clinker with coal gangue as raw material
Hot!
ZHONG Lin, et al.
2024 Vol. 0 (06): 30- [
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75
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33
Practice of cement industry energy-saving and carbon reduction industry leader
HUANG Yi, et al.
2024 Vol. 0 (06): 33- [
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56
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35
Application test of raw coal combustion accelerator in cement production line
LIAN Chao, et al.
2024 Vol. 0 (06): 35- [
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34
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37
Improvement of test method for burnability of cement raw materials
Hot!
SHAO Qiutong, et al
2024 Vol. 0 (06): 37- [
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67
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39
Cement enterprise employee occupational health management improvement case
HU Na, et al.
2024 Vol. 0 (06): 39- [
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44
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42
Structural design and performance prediction of low thermal conductivity composite refractory brick for cement kiln based on ABAQUS
CHU Linhua, et al.
In order to effectively reduce the surface heat loss of the rotary kiln and the standard coal consumption of cement production, the development of new low thermal conductivity refractory brick has become the focus of research. This paper proposed a portable and low-cost method called “ABAQUS-assisted optimization design” for low thermal conductivity refractory brick composition, which focused the mechanical and thermal properties of the composition, and predicted its application in cement rotary kiln. The results showed that the low thermal conductivity aerogel material was combined with the traditional refractory brick with T-shaped structure, which met the mechanical properties requirements of refractory brick engineering application, and can effectively reduce the surface temperature of rotary kiln about 70 ℃. The low thermal conductivity refractory brick has potential application value
2024 Vol. 0 (06): 42- [
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34
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47
Comprehensive treatment practice of air leakage in cement kiln system
XU Benlin
2024 Vol. 0 (06): 47- [
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37
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50
Cement grinding system retrofitted with dynamic separator
YANG Yongchao, et al.
2024 Vol. 0 (06): 50- [
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72
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52
Solutions of HRM vertical mill separator rotor wear
ZHOU Fei
2024 Vol. 0 (06): 52- [
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44
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53
Optimization and upgrading of Jiyuan Zhonglian coal grinding process
Hot!
SUN Chengbin, et al.
2024 Vol. 0 (06): 53- [
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56
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55
Design and use of triangular truss type integrated long belt conveyor
ZHANG Yongqiu, et al.
2024 Vol. 0 (06): 55- [
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37
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57
Cause analysis and solution of heat damage of shaft system of powder separator
LI Xiangyang, et al
2024 Vol. 0 (06): 57- [
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32
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60
Design of cutting station of bound fly ash
WU Meiling, et al.
2024 Vol. 0 (06): 60- [
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37
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63
Optimal control based on cement fineness soft measurement
MU Jiahui, et al.
To solve the problem of difficult optimization control caused by the long-time lag of fineness test delay and long-time lag in the cement combined grinding system, this paper proposed fineness soft measurement and online fineness optimization control method based on radial basis neural network (RBF-NN) and model predictive control (MPC) algorithm. First, relevant characteristic variables in the cement combined grinding system were extracted and data cleaning was completed. The K-Means clustering algorithm was introduced to optimize the parameter selection method of the radial basis neural network, and a cement fineness soft measurement model of the radial basis neural network was constructed. Through periodic scheduling of the model, online prediction of fineness was achieved. Secondly, an online quality control loop was constructed to perform real-time online optimal control of cement fineness based on the cement fineness prediction results and MPC algorithm. Finally, the effectiveness of this method was verified based on a certain cement taking the factory's combined grinding system as an example.
2024 Vol. 0 (06): 63- [
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68
Analysis on design of distributed photovoltaic power station in cement factory
YAO Hao
2024 Vol. 0 (06): 68- [
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37
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71
Application of intelligent expert system based on big data in grinding aids control
ZHANG Lihua, et al.
2024 Vol. 0 (06): 71- [
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43
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74
Practice of fine management of generator and excitation system of waste heat power station in cement plant
WANG Mingyue
2024 Vol. 0 (06): 74- [
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25
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76
Analysis on cause of out-of-control failure of 505 speed regulating system of steam turbine
QIU Yonghua, et al
2024 Vol. 0 (06): 76- [
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32
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78
Application of wireless temperature measuring system in power system
JIANG Yefeng
2024 Vol. 0 (06): 78- [
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45
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80
Improved repair of composite wear of raw vertical mill sealed feeder
BAI Peng
2024 Vol. 0 (06): 80- [
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29
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81
Renovation of cement packing and return dust silo
YANG Hong, et al
2024 Vol. 0 (06): 81- [
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54
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82
Optimization of inner seal of full-sealed vibration conveyor for vertical mill of raw material
ZHANG Zhongguo
2024 Vol. 0 (06): 82- [
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30
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