Effect of the catalyzing combustion of coke breeze on the energy saving in sinter process

2001 ◽  
Vol 8 (4) ◽  
pp. 234-238
Author(s):  
De-qing Zhu ◽  
Guan-zhou Qiu ◽  
Tao Jiang ◽  
Bao-jun Zhu
Keyword(s):  
Energy Saving ◽  
Sinter Process ◽  
Coke Breeze

scholarly journals Thermodynamic Analysis of Iron Ore Sintering Process Based on Biomass Carbon

Energies ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5988
Author(s):  
Mi Zhou ◽  
Zhenyu Yu ◽  
Panlei Wang ◽  
Huaqing Xie ◽  
Yongcai Wen ◽  
...  
Keyword(s):  
Thermodynamic Analysis ◽  
Iron Ore ◽  
Sinter Process ◽  
Great Influence ◽  
Pollutant Emissions ◽  
Coke Breeze ◽  
Maximum Temperature ◽  
Biomass Carbon ◽  
Metallurgical Properties ◽  
Pollutant Gases

The sinter process of iron ore with biomass carbon instead of coke breeze as fuel was investigated via thermodynamic analysis in this paper through a comparison of sinter composition indexes, metallurgical properties, and pollutant emissions. Straw charcoal was used in this paper, and its replacement does not adversely affect the composition index of iron ore, namely Fe, FeO, basicity, S, nor the metallurgical properties, namely reduction degradation index and reduction index. However, the replacement has a great effect on the emissions of pollutant gases, including SO2, NOx, CO, and CO2. The thermodynamic analysis result shows that emissions of pollutant gases produced in the sinter process significantly decrease by using straw charcoal instead of coke breeze in sinter. The sintering maximum temperature has a great influence on sintering technical indicators. The best sintering maximum temperature is between 1300 and 1400 °C, where sinter ore with high quality can be obtained.

scholarly journals Energy Saving of Composite Agglomeration Process (CAP) by Optimized Distribution of Pelletized Feed

Energies ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 2382 ◽  
Author(s):  
Guanghui Li ◽  
Chen Liu ◽  
Zhengwei Yu ◽  
Mingjun Rao ◽  
Qiang Zhong ◽  
...  
Keyword(s):  
Energy Saving ◽  
Heat Input ◽  
Energy Savings ◽  
Lower Layer ◽  
Mixture Distribution ◽  
Total Heat ◽  
Coke Breeze ◽  
Heat Accumulation ◽  
Iron Concentrate ◽  
Agglomeration Process

The composite agglomeration process (CAP) aims at sintering a pelletized feed and a matrix feed together to produce a high-quality burden for a blast furnace. The pelletized feed is balled from fine iron concentrate or refractory iron-bearing resources, while the matrix feed is granulated from iron ore fines, fuels, fluxes and so on. Through mathematical calculation, heat accumulation regularity and heat-homogenizing of the sinter bed are acquired in CAP when pelletized feed is uniformly distributed. Then they are studied in the composite agglomeration process with optimized pelletized feed distribution, which is a novel and perfect sinter bed structure. Results show that large heat input gaps exist in the sinter bed under condition of even sinter mixture distribution, and it is very difficult to realize bed heat-homogenization by directly varying the solid fuel dosage among each layer. An optimized pelletized feed distribution realizes more heat in the upper layer together with heat-homogenization of the middle-lower layer when the proportions of pellets increase first in the middle-upper layer and then decrease in the middle-lower layer of the sinter bed. Under these circumstances, the sinter bed has much better available accumulation ratios with a maximum value of 78.29%, and possesses a greater total heat input of 6754.27 MJ when the coke breeze remains at the original dosage. To make full use of the available heat accumulation and adjust the pellet distribution, a good energy saving effect is obtained because the coke breeze mass declines by 13.91 kg/t-sinter. The current gross heat inputs of each unit are reduced remarkably, leading to a total heat input decrease of 25.95%. In pot tests of CAP, the differences of thermal parameters in whole bed are obviously reduced with the optimized pelletized feed distribution, which contributes to sinter homogeneity and energy savings.

scholarly journals ENERGY SAVING TECHNOLOGIES IN THE IMPLEMENTATION OF CATHODIC PROTECTION OF PIPELINES AND TANKS

2021 ◽  
Vol 3 (163) ◽  
pp. 109-116
Author(s):  
Yu. Kostyuk ◽  
A. Tertishnik ◽  
S. Nesterenko
Keyword(s):  
Automatic Control ◽  
Energy Saving ◽  
Cathodic Protection ◽  
Coke Breeze ◽  
Labor Costs ◽  
New Energy ◽  
Transition Resistance ◽  
Pulse Converter ◽  
Metal Pipes ◽  
Drilling Operations

The data on the introduction of new energy-saving technologies of cathodic protection – the installation of magnetite ground electrodes, the use of new activators based on coke breeze, a pulse converter for automatic control of cathodic protection objects are considered. Practical results show that the use of magnetite anodes allows maintaining a high permissible current density, therefore, it is suitable for widespread use in various soils and seawater. The rate of dissolution of magnetite is 0.02 kg / (A • year). Magnetite anodes are also successfully used for the repair of GAZ wells (deep earthing conductors made of metal pipes). To perform this type of work, a typical project has been developed, which allows restoring the operability of deep anode grounding with minimal costs and without the use of expensive drilling operations. The use of activated coke breeze significantly reduces the transition resistance of the anode grounding. It has been practically proven that when using a coke-mineral activator, the transition resistance is significantly reduced due to an increase in the electrical conductivity of the filler at the anode space, the geometric dimensions and current of the diverting object increase, and the transition resistance of the anode - ground is stabilized. LLC "Elmet" has developed a pulse converter of automatic control IPAU designed to convert alternating current into rectified direct current with the possibility of automatic adjustments in several parameters. The basis of the converters is a high-frequency transistor inverter, developed on the basis of the latest achievements in power electronics. The use of stations of the IPAU type with telemetry allows to reduce labor costs for their maintenance in accordance with clause R.6.1 DSTU B V.2.5-29: 2006 Gas supply system. Underground steel gas pipelines and p. 8.9 of DSTU 4219: 2003 Steel main pipelines, which will make it possible to use the freed up personnel in other areas.

Subjective Time Preference and Willingness to Pay for an Energy-Saving Durable Good

2001 ◽  
Vol 32 (3) ◽  
pp. 133-141 ◽  
Author(s):  
Gerrit Antonides ◽  
Sophia R. Wunderink
Keyword(s):  
Willingness To Pay ◽  
Energy Saving ◽  
Subjective Time ◽  
Durable Good ◽  
Discount Function ◽  
Hyperbolic Discount ◽  
The One ◽  
Two Parameter ◽  
Difference Effect ◽  
Better Than

Summary: Different shapes of individual subjective discount functions were compared using real measures of willingness to accept future monetary outcomes in an experiment. The two-parameter hyperbolic discount function described the data better than three alternative one-parameter discount functions. However, the hyperbolic discount functions did not explain the common difference effect better than the classical discount function. Discount functions were also estimated from survey data of Dutch households who reported their willingness to postpone positive and negative amounts. Future positive amounts were discounted more than future negative amounts and smaller amounts were discounted more than larger amounts. Furthermore, younger people discounted more than older people. Finally, discount functions were used in explaining consumers' willingness to pay for an energy-saving durable good. In this case, the two-parameter discount model could not be estimated and the one-parameter models did not differ significantly in explaining the data.

Classroom Lighting Energy-Saving Control System Based on Machine Vision Technology

2018 ◽  
pp. 143-149 ◽  
Author(s):  
Ruijie CHENG
Keyword(s):  
Control System ◽  
Machine Vision ◽  
Energy Saving ◽  
Back Propagation ◽  
Back Propagation Neural Network ◽  
Lighting Control ◽  
Lighting Energy ◽  
Neural Network Algorithm ◽  
Energy Saving Control ◽  
Model Algorithm

In order to further improve the energy efficiency of classroom lighting, a classroom lighting energy saving control system based on machine vision technology is proposed. Firstly, according to the characteristics of machine vision design technology, a quantum image storage model algorithm is proposed, and the Back Propagation neural network algorithm is used to analyze the technology, and a multi­feedback model for energy­saving control of classroom lighting is constructed. Finally, the algorithm and lighting model are simulated. The test results show that the design of this paper can achieve the optimization of the classroom lighting control system, different number of signals can comprehensively control the light and dark degree of the classroom lights, reduce the waste of resources of classroom lighting, and achieve the purpose of energy saving and emission reduction. Technology is worth further popularizing in practice.

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