Expert System for Artificial Intelligence Blast Furnace Smelting Process

In order to upgrade traditional industry and realize the automation of furnace condition judgement and standardization of operation, an expert system for various furnace conditions and breakdown judgement and operation guidance on blast furnace are developed based on the theory of artificial intelligence and knowledge engineering. The system is fulfilled through C++Builder and combined with the actual production picture. The system has efficient and convenient man-machine interface by using menu operation method. The testing and operation of actual production data in simulation system indicate that the system is exact and reliable and can provide both the warning of various furnace breakdown and corresponding operation guidance.     

Reduction of Titanium Oxide and Thickening of Blast Furnace Slag Bearing Higher Titania

The slag samples that have some titanium oxide reduction grade are reduced with blast furnace slag taken from Pan Zhi Hua Iron & Steel (Group) Co. in site. Then the viscosity and free running temperature of slag samples were measured in laboratory. With the increasing of reduction grade the viscosity and free running temperature of slags would have rising tendency. The mineral structure of the samples is observed in optical microscope, and quantitative analysis of TiC, TiN in the slag samples is made with image analysiser. The results show that the thickening of titanium slag has relationship with the amount of TiC, TiN, which was reduced from titania. So the usage of titanium oxide reduction grade as the index of thickening in blast furnace process is reasonable, and which could represent characteristic of the blast furnace smelting iron ore bearing titanium and vanadium.     

Finite Element Analyses of Spherical Node of Coal Pipeline System of Blast Furnace

The mechanical model of spherical node of coal pipelines of blast furnace is built. Its boundary conditions and loads are presented. Its finite element analyses are used for this structure. Its stress distributing rules are obtained and the security of this structure is evaluated.     

Pretreatment of Coke Oven Waste Water with Blast Furnace Sludge Method and Blast Furnace Sludge Plus Scrap Iron Method

Coke oven waste water is respectively pretreated by blast furnace sludge method and blast furnace sludge plus iron scrap method, the effects of pH and the quantity of materials and treatment time on the removal efficiency of COD are analyzed. The results indicate that blast furnace sludge plus iron scrap method is superior to blast furnace sludge method .The treatment time and pH can greatly affect on the removal efficiency of COD using blast furnace sludge plus iron scrap method. The treatment time after 30 minutes and pH have no remarkable effects the removal efficiency of COD using blast furnace sludge method. The removal efficiency of COD increases with the increase of blast furnace sludge and iron scrap, but the increase rate decreases gradually.     

Optimization and Realization for Sinter and Ore Blending for Blast Furnace

In the ironmaking process, it is essential that sinter and feed of blast furnace are established economically and reasonably. Taking some steel company for example, the best economical condition for feed of blast furnace is comprehensively considered from technologic demand and economic efficiency. According to LP and based on practice and trial, aimed function and confined condition is confirmed, computation programs are made by Matlab while realizing optimization feed. The blast furnace material balance and heat balance are calculated by program with visual interface. Thus, we can directly judge rationality of optimization. The results show that LP is effective method to realize feed of blast furnace.     

Effect of UPC on Energy Distribution and Blast Furnace Smelting Process

The effect of UPC on energy distribution and each smelting index of blast furnace smelting process under a large amount of injection coal with oxygen enriched by an energy management optimizing and expert prognosis system is discussed.[WT5HZ]     

Dynamical Idnetification for Blast Furnace Condition

The correlation dimension for the time series of blast furnace process varisble,such as blast volume, burden pressure drop and blast pressure etc.,have been estimated by using GP and modified GP algorithms.The predictublity analysis for the process variables have also been investigated.The results show that it is difficult to determine the chaotic attractor of blast furnace condition.It has been found that the predictablity for process variables can be used to niterpret and identity the precursor of biast furnace condition.     

Experiment of the Influence of Manganese Oxide on the Prosperities of High Alumina Content BF Slag

Alumina content in Nanjing Steel blast furnace slag is up to 19%, which results in worse slag fluidity, higher furnace operating temperature and higher silicon content of hot metal. Therefore blast furnace strengthening is reduced. Aiming at this problem, an by laboratory experiments the viscosity of simulating Nanjing Steel BF slag samples are measured after adding MnO, which are made up of analytically pure chemical reagents. And according to the experimental results, the influence of MnO on the properties of high alumina content BF slag is analyzed and the methods of reducing silicon content of hot metal in Nanjing Steel is educed. The results showed that the addition of MnO in high Al2O3 content slag has stronger effects on viscosity decreasing, and the decreasing of slag viscosity would make it possible to reduce the operating temperature of the blast furnace, which would result in decreasing of silicon content of hot metal.     

Recent Research on Supervision Running State of the Tuyere and Raceway in Blast Furnace

The manipulators pay fully attention to the running state of raceway looked into tuyere peehole in blast furnace in its production process. And it is important for judgement and control the blast furnace. The pulverized coal feeding and burning cases can be supervised by peehole in tuyere. Temperature distribution can be studied by brightness and numerical simulation of pulverized coal combustion. The recent research of temperature examined and supervision technique of the tuyere and raceway in blast furnace are set forth at home and abroad. A method settling supervision and control the state of tuyere and raceway in blast furnace is put forward by coalescent numeric image process technique to numeric simulate two dimensional imaging technique.     

Mathematical Model of Oxygen Blast Furnace with Preheating Gas Injection into Upper Shaft

An One-dimensional mathematical model,based on oxygen blast furnace with preheating gas injection into upper shaft,has been developed to describe the variation of innerdiameter of blast furnace,13 chemical reactions,the heat losses through the furnace wall,the heatexchange and pressure losses between gas phase and solid phase.The characters of oxygen blastfurnace are discussed,The simulated results indicate that the tem perature of burden in creasesthroughout the upper shaft with the incrcasement of the flow and the temperature of preheating gasinjected,and that the effect of the heating-up of burden is not so large when the com positions ofpreheatin8 gas injeetion are changed.The model is contributed to obtain a deeper understanding ofthe oxygen blast furnace process.     

Research on Blocking and Flooding Behaviours of BF Slag Containing High TiO 2 in Blast Furnace

Smelting process of BF has been patterned with the high-temperature melting-dropping furnace in laboratory,blocking and flooding behaviours of slag containing high TiO 2 in BF have been tested,influences of gas velocity,content of TiO 2,reduced degree of TiO 2 and interface properties of slag-coke on blocking and flooding of molten slag in BF have been researched.     

外源Si对水稻生长状况及稻瘟病抗性的影响

外源Si对提高水稻对病害的抗性有显著影响,但水稻应激防御系统对外源Si的响应机制尚缺乏深入研究。为探究不同浓度外源Si对稻瘟病胁迫下水稻的生长状况、产量及抗性的影响,在人工接种稻瘟病菌的条件下进行水稻盆栽试验。测算了水稻株高、穗数、穗长、地上部生物量和千粒重等生长数据,同时测量了水稻稻穗中MDA的含量和防御相关酶(PPO、CAT、SOD、POD)的活性。结果表明,施Si处理使水稻的稻瘟病病情指数下降了44.47%;显著提高了稻穗中PPO、CAT和SOD的活性,降低了POD的活性和MDA含量,缓解了稻瘟病引起的氧化胁迫;显著增加水稻株高,使其茎叶更加挺直,降低病菌的感染和传播;最终提高地上部干物质量积累,相比染病组的产量提高61.2%。因此,Si能够通过参与植物生理代谢过程,有效增强水稻抵御稻瘟病的抗性,提高植株活力,有效减少植株损伤。     

Research and Application of Temperature-field Digitalizing of the Tuyere and Raceway Section in Blast Furnace

It is useful for diagnosing coal combustion status and the tuyere and raceway in blast furnace, at the same time, it is supervision running state to study on temperature-field of also helpful for supervising the structure of oxygen and coal burning apparatus, improving coal combustion technology and coal injection operation. The model between red and green information of true color flame image and temperature is established and two dimension raceway section projection temperature-field are achieved by applying no-touch radiation temperature measurement theory and technology. It is proved with experimentation that the method is effective and feasible, and the testing precision can reach 98.09% compared to the testing result of thermocouple of taking out gas.     

稻瘟病胁迫下水稻叶片叶绿素含量与光谱特征参数的相关性研究

为实现受稻瘟病侵染水稻叶片叶绿素含量的高光谱反演,以‘陵两优268’为研究对象,测定受稻瘟病侵染的85个水稻叶片样品的叶绿素含量和高光谱反射率,分析受稻瘟病侵染的水稻叶片高光谱反射率与叶绿素含量间的相关关系,使用线性与非线性回归技术建立叶绿素含量反演模型。结果显示:叶绿素含量与原始光谱及一阶导数光谱的敏感波段分别发生在700 nm和752 nm,基于光谱特征参数SDr的回归模型均方根误差为1.27,平均相对误差为10.2%。研究表明受稻瘟病侵染水稻叶片光谱反射率差异明显,基于光谱特征参数SDr的回归模型预测叶绿素含量具有较高的精度。     

CCD-based imaging and Monitoring System in the Raceway of Blast Furnace

The essay introduces the research status, the design principle, the composition and the test of the CCD-based imaging and monitoring system in the raceway of blast furnace. The CCD-based imaging and monitoring system in the raceway can show the running statement of the raceway in the monitor of operate room continuously, which enables the BF operator to observe the lightness and activity of raceway, the status of coal injection, the dilapidation of raceway and enhances the correctness of operate. Meanwhile, the system can transport the burning image of raceway to the computer, experimental results of which indicate the temperature error between the image-digitalize method and the measuring result is within three percent. The sustem can satisfy the demand of engineering.     

The Study on Smelting Ti-Si Ferroalloy by DC Electrothermal Process Using PISC Blast Furnace Titaniferous Slag

The new process for semiting Ti-Si ferroalloy using Panzhihua Iron & Steel Company (PISC) blast furnace titaniferous slag is introduced. The reduction and impoverishment law of TiO2 in slag and the effects of DC on smelting Ti-Si ferroalloy are studied when smelting Ti-Si ferroalloy by electrosilicothermal method,Ti-Si ferroalloy containing about 20% Ti can be produced by electrosilicothermal method. and Ti recovery rate is less than 60 %. And then, electrosilicoaluminothermal method is developed, by which Ti-Si ferroalloy containing Ti more than 30% and Si less than 35 % can be produced, and Ti recovery rate is higher than 80%. Ti-Si ferroalloy can replace TiFe martially in steelmaking,and residue slag can be used to make cement.     

Study on Reasonable Burden Structure of Smelting Vanadium Titaniferreus Magnetite in Blast Furnace

Under the condition of imitating the smelting process.the investigation has been carried out to the properties of melt dropping behaviours and reduction for several kinds of vanadium titaniferrous magnetites,such as sinter,pellet and lump ores;and especially the relation between the mineral constitute basicity of ores and its high temperature metallurgical quality is studied with its influence on the reduction process at the low and high temperature zones and the titanium reduction. So the reasonable burden mixture of smelting vanadium titaniferrous magnetites is high basicity sinter and acidity pellet. However,with the existing conditions of the steel plant.it is essential to improve the basicity of the sinter.     

Study on the Dearsenization of Hot Metal Using CaO Basis Fluxes

There is plenty of iron ore with arsenic in China. Because a proven dearsenization technique does not come into existence in now iron making and steel making processes and it is necessary for developing the dearsenization of hot metal technologics. A serial of dearsenization experiments are carried out on electric resistance heated furnace, it's found that arsenic in hot metal can be removed by CaO basis fluxes. X ray qualitative analysis of CaO basis slag after dearsenization revealed that the product of hot metal dearsenization with CaO slag is Ca 3As 2 and the dearsenization reaction is a reducing one. The thermodynamic conditions of dearsenization of hot metal using CaO basis fluxes are that the lower of oxygen fraction pressure of the system and [s] in hot metal, the higher of temperature of the system and basically of the slag, the dearsenization efficiency is better.