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                钛矿护炉一字不漏机理

                tsgt001
                tsgt001
                一级 试用期

                状态:未解决
                查看次数:2944
                类目:  炼铁问吧 >
                悬赏: 15
                发布时间:2015-08-19 14:33
                离问题结束还︻有: -1385天-15小时-21分

                含钛原料在高炉内的反我們根本就進不去应过程,如何形成防护层来降低炉缸侧壁温度高的

                信息编号:583   查看次数:2944  2015-08-19 14:33 发布人:tsgt001 一级 试用期  IP:222.134.216.50  
                其它回答(5)
                [Ti]与高炉炉□ 缸
                1、 TiO2还原的热力学△条件
                        SiO2的还原是从高炉软熔带以下开始,经过滴下带到炉缸完成的。比较SiO2与的分解反●应自由能变化
                                                                 △G°SiO2  =216500 – 42.0T                                                   ①
                                                                 △G°TiO2  =225500 – 42.8T                                                   ②
                        可以看你竟然還知道神界出两个分解反应的熵几乎相等,只是TiO2分解所需的也低聲冷喝道热要大一些,故TiO2较之SiO2更难还原。
                        根据钛氧化物还原的各级反应自由能计算,还幻心鏡原性气体(CO、H2)不能承担钛氧化物还原的任务。因此,钛氧化物的还原过程主要我教你一個遁法是在高温条件下有固体碳来你務必要把它們融合起來实现的
                                                               TiO2+ 3C=== TiC+ 2CO          △G°  =120460 – 80.52T           ③
                                                               TiO2+ 2C+1/2N2=== TiN+ 2CO   △G°  =84160 – 60.95T         ④
                        两淡淡朝十號貴賓室瞥了一眼者反应的温度都在1100℃以上,当温度超▓过1581℃时,TiC的还原势傳令下去能大。
                        综合以上,不难发现滴下带存在着TiO2还原的较为完备的热力学和动力学条件,接近风口燃烧温度的高温,炽热的焦炭粒提供了强还原性气氛,加之冶炼∮炼钢生铁过程中铁水的碳量緩緩開口在滴下过程中迅速增加,[C]达4%以上,也为钛氧化敵人來襲【一更】物的还原提供了还原剂,为还原产物的扩散提供了良好的条件。
                高炉高度上的嗤TiC、 TiN变化
                高炉部位 TiC  % TiN  %
                炉腹         1.03   0.56
                风口平面 1.23         0.80

                2、 [Ti]与炉缸工作百先生
                        不管TiC、 TiN的生成部位在何处,其最终都将随炉渣与铁液聚集到炉缸,对炉缸的工作产生影响。由于铁水中的钛大多是以TiC、 TiN的形式一直以來都沒有任何人知道存在,它们的熔点分别是3150℃和2950℃,在铁水中以固体颗粒形層次式悬浮于铁液中,增加铁液粘稠度,降低铁砰水流动性,起到护炉作用。
                       [Ti]不仅半身起到使铁水粘稠的作用,还促把握到對岸进碳的石墨化,造成铁水粘稠更甚。[S]则相反,在高炉中起他着阻止碳的石墨化的作用。
                3、 风口「喂钛精粉
                        当高炉炉缸局部出现水温差升高、耐火材料测点热电偶温度上升超过操作规程规定頓時萬物齊飛的要求时,我们必须高度重视。
                3.1 加强水温差测你要知道量,增加测量频次;
                3.2 对水温差高度部位涅冷却壁进行热流强度检测,热流强度 百曉生淡然一笑大于30000kJ/(h•m2)就要高度重视,适当控制冶炼强度、增加该区域冷却壁的冷却强度(常压水该高压水)、热流星主府之上强度大于40000kJ/(h•m2)高炉休风缩小该区域上方风口进风面积或堵风口操作;同时可以采用钛矿冶炼或钛隨后臉色大變精粉喂线护炉。经验是:当铁水中[Ti]大于0.150%以上时,铁水粘稠度增目光冰冷加,铁水中[Ti]大于0.200%以上时,可以點了點頭起到保护炉缸的作用;当热流强度大于50000 kJ/(h•m2)时,高炉要密切关注该区域呼的变化,防止出现炉缸局部烧穿的事故发生。

                                                                                                                   2015年8月20日

                回复时间:2015-08-20 09:57 回答者:马铁人 马铁人 一级 试用期

                钛能阻止碳的Ψ 石墨化

                回复时间:2015-12-07 15:45 回答者:钱多多 钱多多 一级 试用期

                难熔,沉积于炉底

                回复时间:2016-03-15 10:52 回答者:山丘 山丘 一级 试用期

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