Papers by Keyword: Cement Industry

Abstract: Based on the analysis of the development situation of China’s cement industry and the BCG Matrix method, this paper classifies and screens 31 energy-saving technologies in China's cement production, and puts forward guiding suggestions for the application of energy-saving technologies for cement enterprises. The screening results show that the “Energy-efficient powder separation technology” and “New low-calcium cement clinker and production technology” are “double-high” technologies with excellent on both screening indicators. The investment energy saving rates are 17.5 tce/10,000 yuan (tons of standard coal equivalent per 10,000 yuan) and 10 tce/10,000 yuan. The promotion ratio increments are 35% and 25%. “Cement clinker energy-saving nitrogen reduction firing technology”, “Fan drive mode adopts high voltage frequency conversion speed control technology”, “Pure low temperature waste heat power generation technology for cement kiln” are “single-high” technologies with excellent on one of screening indicators. The investment energy saving rates are 0.3tce/10,000 yuan, 4.1tce/10,000 yuan, 3.9tce/10,000 yuan respectively. The promotion ratio increments are 19%, 35%, 31.5% respectively.

Abstract: This paper predicts and analyzes the output, energy consumption and CO₂ emission in Chongqing’s cement industry in 16 years to come using a dynamics simulation system of carbon emission. A comparison with historical data indicates a desirable goodness of fit of the simulation results, which show that the cement output in Chongqing will reach the peak of about 95 million tons in 2020, followed by a slow decrease to 90 million tons towards 2030; the energy consumption will reach a maximum of some 7.8 million tons of standard coal in 2020; the CO₂ emission will reach about 76 million tons in 2020, followed by a drop to 60 million tons towards 2030, equivalent to the 2015 figures. Based on the data, this paper analyzes the influence of different technical paths and policy options on emission in various developmental scenarios, and proposes specific paths for emission reduction.

Abstract: The lance is the key equipment of SNCR flue gas denitrification technology injection system on the new dry process cement production line.The atomizing effects of reducing agent will directly influence the result of flue gas denitration. In this paper, there are the structure design and experimental analysis on denitration lance.The results show that the lance can ensure the average diameter of atomized particles is from 50 to 55um,uniformly degree is above 80%, and visual distance of atomized ammonia is above 4 meters.It has been applied in a new dry process cement production line of daily 5kt SNCR flue gas denitration project, reaching above 70% of denitration efficiency. These results are valuable for similar new dry cement clinker production line of SNCR denitration Technology.

Abstract: Cement is widely produced and used. However, cement production significantly consumes energy and natural resources and globally accounts for approximately 5% of man-made CO₂ emissions.

Abstract: Combinating the process theory and system theory organically, this paper views enterprise’s technological innovation as a continuously improved system process. It builds a system model for the evaluation of technological innovation capability based on the view of process. Considering the features of cement industry, the technological innovation capabilities in cement industry are divided into innovation management capability, innovation input capability, research & development capability, manufacturing capability, marketing promotion capability and innovation output capability. And we propose a comprehensive and complete evaluation index system of cement industry’s technological innovation capability and provide a ruler for the evaluation of cement industry’s technological innovation capability

Abstract: the cement indusrry has a far-reaching effect on the economical development, and city is a layout poured by cement. The China cement industry is very promising, the choice between its industry layout and city economy development is an important content of the modern economy. In China, the cement industry not merely needs to be greatly develped, and much need to improve the structure and quality of the city. The city development needs the cement industry to scientifically adjust its industry layout, develop marketing channels, and improve the production service function. The industry development can promote regional economic harmonious order, and make progress in good way.

Abstract: Since the relationship between supply and demand of natural resources is on edge in the long run, the traditional extensive growth mode of economic development needs changing. Cement is widely used in construction. Producing cement needs large amount of natural resources and releases high waste emissions. By using Material Flow Analysis, the inputs and outputs of each part of manufacturing are analyzed scientifically and the inputs, outputs and efficiency indicators are accounted. The main hidden flows come from energy consumption, and the main harmful waste is CO₂ which comes from fuel combustion and CaCO₃ decomposition. Improving resource consumption efficiency and reducing CO₂ emission are the key ways to alleviate pressures on the environment.

Abstract: Industrial development has lead to higher energy consumption, and emission of greenhouse gases. Cement industry plays an important role in energy consumption and overall greenhouse gases emissions. This paper reviews the preceding studies concentration on the provision of energy saving, carbon dioxide emission reductions correlated with implementation of a number of technologies applicable to improve the energy efficiency in the cement industry. Energy efficiency measures for clinker production. It is found the largest amounts of thermal energy saving, electrical energy saving, emission reductions are 4.1 Giga Joule per ton, 35 kilo Watt hour per ton, 112,61 kilogram CO2 per ton respectively.

Abstract: The sulfation behavior of calcined raw meal was investigated in a laboratory fix-bed reactor under conditions typically for SO2 capture in the kiln inlet housing used in cement production. The initial period is characterized with a fast-increasing conversion, while the second period shows a slow-increasing conversion. A desirable temperature exists for sulfation of calcined raw meal. A smaller particle size favors the sulfation reaction. The initial conversion rate is significantly promoted by a higher SO2 concentration. The SEM examinations show that the sulfation process involves nucleation and growth of CaSO4 grains- the sulfation product. Increasing the temperature and extending the time result in fewer but larger CaSO4 grains in the product layer.

Abstract: Cement industry bear the brunt in the tide of resisting global warming because of large carbon dioxide emission. Five low-carbon measures and implementation approach to Chinese cement industry was put forward: Increasing industrial concentration degree and developing new dry process cement; Processing waste in cement kilns and reducing the use of raw materials and fuels; Increasing the amount of admixture in cement; Producing cement from calcium oxide content solid waste; Taking energy-saving measures such as cogeneration and grinding technology.