共查询到20条相似文献,搜索用时 15 毫秒
1.
2.
3.
4.
5.
X射线衍射法测定高炉渣中非晶相含量的研究 总被引:1,自引:0,他引:1
用X射线衍射法对高炉渣中非晶相含量进行了定量分析。采用晶态衍射峰和非晶包的积分面积分别表征高炉渣中晶体和非晶体的衍射强度,在此基础上找出晶体与非晶体的质量比(mc/ma)和晶态与非晶衍射峰的面积比(Ic/Ia)呈线性关系的区域,并通过线性回归求出比例系数K。实验发现,不同的炉渣mc/ma和Ic/Ia呈线性关系的区域不同,它们的K值也各不相同;这种方法适用于对非晶含量较高、采用急冷处理的高炉渣进行定量分析;该方法的绝对误差<4%、相对误差<5%。 相似文献
6.
7.
8.
文章采用X荧光仪快速测定高炉渣钾钠.主要介绍测定高炉渣钾钠的技术创新,直接通过压片快速检测.相对原子吸收与ICP测定钾钠,检测速度快,分析步骤简单,此方法为高炉生产的稳定提供了重要数据. 相似文献
9.
用稀盐酸处理高炉渣的方法 总被引:1,自引:0,他引:1
本发明涉及一种用稀盐酸处理高炉渣的方法,该方法采用10~14%的盐酸浸取高炉渣,用该浓度浸取不仅可以有高的浸出率,而且浸出物为溶液状态,从而有利于硅胶钛白粉,结晶氯化铝,氯化镁,石膏,生铁的提取,该方法成本低,方法简单,环境污染小,浸出率和各元素的提取率也高。 相似文献
10.
11.
12.
研究分析了钢包缝隙式透气砖内钢液的渗透机理,并依据缝隙内渗透金属液的动量守恒及能量守恒,建立了描述缝隙内钢液渗透的数学模型,对钢液渗透的动力学行为进行了研究,理论计算结果与试验数据进行了对比。研究结果表明,透气砖缝隙内钢液渗透主要是由于黏附力达到极限导致的,渗透一旦发生,金属液会在较短时间内迅速渗入透气砖缝隙;受缝隙长度影响,钢液的渗透过程存在不稳定渗透阶段,之后渗透深度达到最大值,并不再发生变化,研究结果为底喷粉元件抗渗透性设计提供了依据。 相似文献
13.
14.
对影响钢包底吹氩系统透气砖透气性的因素进行了分析,并制定了针对性措施,2010年第一季度的钢包底吹透气性稳定在99%以上,取得了较好效果。 相似文献
15.
本文论述广钢采用钢包底吹氩技改措施,提高转炉厂连铸坯合格率,进一步保证下工序转炉成品材的力学、弯曲性能符合标准的要求,切实提高顾客的满意度。 相似文献
16.
采用热重分析及量热仪分析了褐煤与传统喷吹用无烟煤燃烧性及发热值的差异,并采用长管式煤粉爆炸性测定装置研究了粒度对褐煤爆炸性的影响。同时针对混煤中褐煤的适宜配加比例,研究了褐煤添加量与混煤的爆炸性和燃烧性的相关性。结果表明,褐煤粒度小于0.087mm后呈强爆炸性。但褐煤与无烟煤混合能够有效抑制爆炸性,当混合样品中褐煤的质量分数低于40%时混煤没有爆炸性。褐煤的燃烧性好于无烟煤,二者混合后随褐煤比例的增加,混煤的失重曲线出现双特征峰,提高褐煤掺混比能够改善混煤的燃烧性。综合以上研究结果表明,褐煤用于高炉喷吹时的比例控制在40%(质量分数)以下为宜。 相似文献
17.
《钢铁研究学报(英文版)》2016,(2):98-102
The reaction of CO_2 gas with hot metal was investigated based on the thermodynamic analysis and experimental results.It shows that both silicon and carbon in hot metal can be oxidized by CO_2 gas in the temperature range of 1 300-1 500 ℃.When using graphite crucible,temperature has little influence on final mass percent of carbon w[C]because of the carburization effect.Decarburization degree rises significantly with increasing gas injection rate and w[C]can be reduced to 3.2% at most when using MgO crucible.Lower temperature or higher gas injection rate is propitious to promote desilication reaction,but only 5%-10% of desilication ratio could be obtained in 20 min.The final mass percent of silicon w[Si]when using MgO crucible is lower than that when using graphite crucible.Experimental results also demonstrate that CO_2 injection has no effect on the concentration of manganese,sulfur and phosphorus in hot metal.In view of the weak oxidation ability and temperature drop of hot metal,CO_2 gas is suggested to be used as carrier gas in desilication process rather than oxidizing agent. 相似文献
18.
利用电弧等离子体高温热解装置、多功能气相色谱仪和扫描电镜(SEM)对承钢高炉喷吹煤种进行高温热解实验,研究了配煤和添加助燃剂后煤粉的热解率、热解气体产率、热解气体组成的变化规律。结果表明,配煤和添加助燃剂都能提高煤粉的热解率和气相产物的产率,当烟煤配比在60%(质量分数)时,配煤方案的热解率最高为55.17%,添加助燃剂能够继续强化配煤的热解性能。热解气体中CO和H_2的含量随烟煤配比和助燃剂增加而增加,小分子烃类物质的产量减少,残渣颗粒表面出现大量不规则形状的突起,并伴有较多的裂纹、空隙和大量的孔状结构,进而提高煤粉在高炉风口区域的高温热解性能。 相似文献
19.
20.
The interaction mechanism between the combustion products of pulverized coal injected and coke in the raceway of blast furnace was studied through thermodynamic calculation and experiments.The results in-dicated that additives significantly affected the melting property of coal ash in high temperature zone.Al-though the unburnt char, raw coal ash, and catalyzed coal ash failed to wet the coke surface, the wettabil-ity of the catalyzed coal ash on the coke was greater than that of the raw coal ash.Since the unburnt char had weak reaction with the coke surface, it showed little influence on the surface morphology of the coke. The interaction between the raw coal ash and the coke gave rise to the increase in the pore size on the coke surface.However, the raw coal ash only affected the coke surface and the entrances of the pores owing to its poor fluidity.After being melted, the catalyzed coal ash was expected to immerge into the inside part of the coke and then react with the coke, resulting in an expansion and increase of coke cavities.The raw coal ash and the unburnt char reduced the coke reactivity, while the catalyzed coal ash improved the coke reac-tivity.Thereinto, the coal ash containing Fe2 O3 exhibited a larger influence on the reactivity than that containing CaO. 相似文献