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1.
Zhu Zizong Zhang Binghuai Zou Deyu Liu Qingcai 《保鲜与加工》1993,(5):115-119
In order to clarify the effect of unburnt pulverized coal (UPC) on coke pulverization properties. A series of fundamental experiments were carried out at laboratory furnace. The main results obtained are as follows: (a)Under the same temperature,coke fines increases remarkably with the progress of gasification for an hour, but after UPC was injected into coke layer, coke fines decreases; (b) Under the same temperature, Strength of coke increases after the reaction and coke fines decreases as the amount of UPC being injected into coke layer increases. 相似文献
2.
A series of fundamental experiments are carried out to clarify UPC on the effect of taking shape and dropping of slag of BF at PANZHIHUA I & S CO. by using high temperature. oven simulation cohesive zone and dropping zone of blast furnace. The following results are obtained: The dropping quantity of the Titanium bearing Slag increases with UPC increasing. It is conclusion opposite to that of commonly blast furnace slag. 相似文献
3.
ZHU Zi-zong 《保鲜与加工》2000,(2):45-48
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] 相似文献
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A series of experiments were carried out on the coke sprayed with ZBS of Anyang and Kunming Iron & Steel Co.,Ltd on the reaction electrical furnace.The microstructure of coke before and after spraying with ZBS were investigated with SEM and HY-4 Automatic microdensitometer.Coke reaction index and coke strength reaction were investigated according to the GB/T4000-1996.The results are as follows:Compared to original coke sample,the pore space become relatively little and small,and the coke hole rate is reduced.The ZBS carbide with brilliant white rib formed around the gap,existed in the coke reacted 2 hours,and it can improve CSR.ZBS can obviously improve coke thermal properties.The worse coke thermal properties are,the bigger the margin improved by ZBS are. 相似文献
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焦炉集气管压力是炼焦生产过程中重要的工艺参数,其值是否稳定,直接影响到煤气质量、焦炉寿命、焦炭质量和生产环境。针对焦炉集气管压力系统是一个强干扰、非线性和多变量耦合的复杂系统,采用LS-SVM辨识出焦炉集气管压力系统的逆系统模型,并将其串联在原系统之前,运用逆系统的方法将集气管压力系统解耦成2个相互独立的单输入单输出伪线性子系统。同时,对解耦后的系统采用非线性内模控制策略以保证系统的鲁棒性和稳定性。仿真和应用结果表明该控制策略的解耦控制效果较好,提高了系统的快速调节能力和跟踪精度,而且增强了系统的鲁棒性,可以保证焦炉集气管压力稳定在现场工艺要求的范围内。 相似文献
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In the paper, the process of determining the degree of graphiti-zing of metallurgy coke with X-ray diffraction method was discussed. The extrapolation was used in order to obtain the interplanar distance. of (002) crystaloface of metallurgy coke. The finding showed that the dmax. wasn''t 3.44A, butO4.31A. A rational formula which could be used to characterize the degree of gra-phitizing of metallurgy coke was found. 相似文献
7.
We developed a process model of flame beam transmission using pulverized coal powder and coke combustion in a raceway. We employed a Monte Carlo computation method equation based on charge couple devrce(CCD) target heat flow distribution for radiation heat transfer. We explored the factors impacting radiation transmission. Based on these, a three dimensional reconstruction was analyzed at varying coke particle concentrations. This model provided an effective method to produce on line monitoring of raceway working states. 相似文献
8.
Method to Predict the Coke Rate Based on BP Neural Network 总被引：2，自引：0，他引：2
Coke rate is a very important technique index in the processing of metallurgical, and it is also an important goal that should be reached and controlled in practice.The blast furnace is a countercurrent heat and mass exchange reactor involving the solid, liquid and gaseous phases. Using computer encoded mathematical and statistical methods can not get the precise result. An improved 9-9-1 BP(Back propagation) neural network was trained and used in the prediction of the coke rate. The result indicates that the BP nets can predict coke rate accurately and the error between prediction and real coke rate less than 2%. And the use of a hybrid model in actual on-line intelligence control was also discussed. 相似文献
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The composition and heavy metals content of sludge, solid wastes and coke breeze is detected in the test. Sludge, solid wastes and coke breeze compost the organic composite fertilizer. The experiments on it for rice fertilization were conducted. The results show that the contents of organic matter and N, P, K in wastewater sludge and solid wastes of Guilin are very abundant and heavy metals remain under the criteria. There is a significant efficiency for the organic composite fertilizer applied in raising rice yield, providing an extensive applicability. 相似文献
11.
ZHANG Sheng-fu WEN Liang-ying BAI Chen-guang CHEN Deng-fu DONG Ling-yan OUYANG Qi 《保鲜与加工》2005,(8):42
Based on inevitability analysis of Tuyere coal and Raceway coke combustion numerical simulation, this paper retrospects previous study and summarizes two phase turbulent flow numerical model of pulverized coal and air, pyrogenation and radiation transmit-heat numerical model of pulverized coal volatile ash, combustion energy equation of coke grain. The authors put forward a new idea of boundary condition using CCD technique. 相似文献
12.
不同生态条件对玉米郑单22生长发育及产量的影响 总被引：1，自引：1，他引：0
通过播种期试验,研究了不同生态条件对玉米品种郑单22的生长发育和产量的影响。结果表明,在河南夏播条件下,随着播种期的推迟,郑单22的产量逐渐下降,穗行数、行粒数和千粒重均逐渐降低,生育进程加快,叶面积指数最大值、干物质积累量逐渐减小,但6月15日以前播种的差异不大。适宜生态条件为：全生育期积温2835.1~3038.2℃,至2560.4℃产量严重下降;全生育期日均温度为25.3~25.7℃,至25.1℃产量严重下降;全生育期光照484.2~630.4h,至420.7h产量严重下降;全生育期日均光照为4.3~5.3h;至4.1h产量严重下降 相似文献
13.
为了优化植物提取物的提取工艺,采用水浸提的方法研究了牛蒡、大豆、大蒜提取物的提取工艺。选取固液比、提取温度、提取时间等3项考察因素,采用正交实验对提取条件进行优化。实验结果表明：影响提取率的主因素综合来说是提取温度。其中,对于牛蒡来说,最优的提取工艺为：固液比1：20（重量比）,提取温度70℃,提取1小时。对于大豆来说,最优的提取工艺为：固液比1：10（重量比）,提取温度70℃,提取1.5小时。对于大蒜来说,最优的提取工艺为：固液比1：20（重量比）,提取温度90℃,提取2小时. 相似文献
14.
A system simulation mathematical model on oxygen blast furnace ironmaking process is established. Provided that the material composition and the values of necessary process parameters are given, the model can predict the consumptions of raw material, fuel and flux, the quantity and composition of slag, the quantities and components of all kinds of gases, etc. At the condition of 90% stack ore metallization, the calculated results of the model show that when more circulating gas are introduced into the stack, the heat controls the total gas for the stack ore reduction, while when more circulating gas are introduced into the hearth, the reductive components control the total gas for the stack ore reduction. At normal operations with coke rate fixed, the coal consumption linearly increases with the output top gas. When the coke rate is fixed at 200 kg, the minimum value of calculated coal rate is 200 kg or so. 相似文献
15.
油菜高效转化系统的研究 总被引：17，自引：1，他引：16
以甘蓝型油菜湘油13为试验材料,运用子房注射法将BT毒蛋白基因导入油菜。在授粉后第20小时至第30小时用自制的微玻针从子房中部注射0.5~1.5μg外源DNA,以高达12.8%的频率获得抗卡那霉素植株。分子杂交分析证明BT毒蛋白基因已整合到油菜基因组中,转化频率为1.6%,表明子房注射法是一种有效、实用的油菜遗传转化方法。 相似文献
16.
Liu Qingcai Zhang Binhuai 《保鲜与加工》1996,(5):63-67
The melts of smelting reduction with iron bath has peculiar behaviour for high concentration and high reduction rate of FeO.Testing results show that slag is sure foaming.The generation of the foaming slag is effected by FeO concentration and reduction rate as well as basicity of slag.Addition granulated coke can decrease foaming or without ability of foaming. 相似文献
17.
宁夏梨树霜冻指标试验研究 总被引：4，自引：1，他引：3
霜冻是制约着梨树生产的主要农业气象灾害之一,探究梨树霜冻指标可为梨树霜冻预报、监测预警及梨树霜冻灾害风险评估和灾害防御提供参考。笔者采用人工霜箱开展模拟霜冻试验对梨树开花期及幼果期遭受霜冻的临界温度及持续时间进行研究,结果表明：-4℃是梨花器官遭受霜冻的致死温度,‘玛瑙’梨花期遇-3℃低温持续2 h 遭受轻度霜冻,持续2.5 h 遭受中度霜冻;重度受冻的临界温度及持续时间为-3℃持续3 h 及以上、-3.5℃持续时间大于等于0.5 h 或-4℃及以下。‘甘泉’和‘新高’的耐冻性差于‘玛瑙’。对于幼果,3 个品种的耐冻性差异不大,-2℃持续2~3 h 或-2.5℃持续1 h 幼果出现轻度受冻;-2.5℃持续2~3 h,-3℃持续1 h 为中度受冻,-2.5~-2℃持续4 h、-3℃持续1 h 以上为重度受冻。未达到致死温度时,随着持续时间延长,受冻程度增加,幼果直径越小,受冻越严重。 相似文献
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为了进一步明确煤粉尘的沉降特征及其对植物抗逆系统的影响,笔者通过室外定期收集降尘及室内植物生理指标分析等方法,研究了孝义市梧桐镇某焦化厂储煤场周围下风向400 m范围的总降尘和煤粉尘的沉降规律,及其煤粉尘对该范围内所种植苗期玉米抗氧化系统的影响。结果表明,随着距储煤场距离的增加,总降尘和煤粉尘的量显著减少,而苗期玉米叶片的总抗氧化能力（T-AOC）、双氧化物岐化酶（SOD）、脱氢酶（CAT）、丙二醛（MDA）也均显著降低,尤其是SOD酶活性表现更为敏感。总之,煤粉尘的降落促进了玉米体内抗逆系统的防御能力,因而导致T-AOC、SOD、CAT抗氧化指标的增加,减少了对玉米的氧化伤害。 相似文献
20.
通过播期试验,研究了不同生态条件对高淀粉玉米品种郑单21的生长发育和产量的影响。结果表明,在河南夏播条件下,随着播期的推迟,郑单21的产量逐渐下降,穗行数、行粒数和千粒重均逐渐降低,生育进程加快,叶面积系数最大值、干物质积累量逐渐减小,但6月15日以前播种的差异不大。适宜生态条件为：全生育期积温2596.2~2764.5℃,至2311.7℃产量严重下降;全生育期日均温度为23.2~24.0℃,至22.7℃产量严重下降;全生育期光照514.9~603.2h,至436.7h产量严重下降;全生育期日均光照为4.6~5.2h;至4.3h产量严重下降。 相似文献