CN108911762A - 一种高炉护炉造壁炮泥 - Google Patents

一种高炉护炉造壁炮泥 Download PDF

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CN108911762A
CN108911762A CN201810631458.5A CN201810631458A CN108911762A CN 108911762 A CN108911762 A CN 108911762A CN 201810631458 A CN201810631458 A CN 201810631458A CN 108911762 A CN108911762 A CN 108911762A
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崔健健
佘春霞
许华
张文
王攀
钱忠华
郑韬
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Abstract

本发明公开了一种高炉护炉造壁炮泥，包括以下组分且各组分的质量比例为：高纯钛超微粉5～15份；钛白粉20～25份；碳化硅20～30份；纳米级炭黑10～15份；硅石30～40份；氮化硅细粉2～5份；氮化铝细粉20～30份；四硼酸锂2～10份。本发明能够使炮泥在使用过程中易开口，易堵口，可塑性强，抗渣、铁侵蚀性能优异，铁口孔道稳定，铁口深度深，有效降低铁口区域炉缸温度，保护铁口区域炉缸砖衬。

Description

一种高炉护炉造壁炮泥
【技术领域】
本发明涉及耐火材料制造的技术领域，特别是一种高炉护炉造壁炮泥的技术领域。
【背景技术】
高炉铁口在长期的冶炼生产中，由于长期承受冲刷和侵蚀，出铁口炉缸侧壁变薄，形成局部异常侵蚀，铁口附近炉缸水温差、热流强度及温度较易出现偏高于正常点，导致炉缸侧壁温度升高。炮泥除了堵出铁口和稳定出铁的作用之外，还被赋予保护炉缸、延长高炉底部侧砖寿命的功能，水炮泥因为体积密度小、烧结性能差、烧结收缩率高、易产生裂纹、耐渣铁侵蚀性能差等缺点而难以满足需要，无水炮泥一般以刚玉、碳化硅结合氮化硅、焦粉、结合粘土等为主要原料，同时配加不同的外加剂，用蒽油、洗油或焦油作结合剂，耐压强度和抗折强度较差，同时其抗氧化性和抗渣、铁侵蚀性也较差。
【发明内容】
本发明的目的就是解决现有技术中的问题，提出一种高炉护炉造壁炮泥，能够使炮泥在使用过程中易开口，易堵口，可塑性强，抗渣、铁侵蚀性能优异，铁口孔道稳定，铁口深度深，有效降低铁口区域炉缸温度，保护铁口区域炉缸砖衬。
为实现上述目的，本发明提出了一种高炉护炉造壁炮泥，包括以下组分且各组分的质量比例为：高纯钛超微粉5～15份；钛白粉20～25份；碳化硅20～30份；纳米级炭黑10～15份；硅石30～40份；氮化硅细粉2～5份；氮化铝细粉20～30份；四硼酸锂2～10份。
作为优选，所述高纯钛超微粉的纯度在99％以上，所述高纯钛超微粉的粒径为1～5um。
作为优选，所述碳化硅和纳米级炭黑在所有组分中所占的总质量分数为20～30％。
作为优选，所述氮化硅细粉的粒径为0.2～0.5mm，所述氮化铝细粉的粒径为0.1～0.3mm。
作为优选，所述各组分的质量比例为：高纯钛超微粉15份；钛白粉25份；碳化硅30份；纳米级炭黑15份；硅石40份；氮化硅细粉5份；氮化铝细粉30份；四硼酸锂10份。
作为优选，所述各组分的质量比例为：高纯钛超微粉5份；钛白粉20份；碳化硅20份；纳米级炭黑10份；硅石30份；氮化硅细粉2份；氮化铝细粉20份；四硼酸锂2份。
作为优选，所述各组分的质量比例为：高纯钛超微粉10份；钛白粉22份；碳化硅25份；纳米级炭黑12份；硅石35份；氮化硅细粉3份；氮化铝细粉25份；四硼酸锂8份。
本发明的有益效果：与传统的产品相比，本产品中的护炉物质TiO2在高温熔融渣铁中与C和N反应生成TiC和TiN以及Ti(C，N)，铁水对TiC、TiN的润湿角比较小，因而铁水很容易润湿并粘附Ti(C，N)，在铁水珠外形成一层Ti(C，N)薄壳，悬浮在渣铁界面，TiC、TiN熔点高(TiC熔点为3150℃，TiN熔点为2950℃，高于渣铁温度)，只能呈半熔融或固相状态悬浮在铁口周围渣铁中及其界面处，出铁时，随着渣铁液面的下降逐步沉积到铁口周围的砖衬上，达到足够的沉积量后，在泥包周围砖衬上形成钛积保护层，钛积保护层的结构致密、硬度大、热阻性大、熔点高，附于铁口周围的砖衬或凝铁层之上，起到保护了铁口区域的作用，可以有效降低铁口区域炉缸侧壁温度，引入反应催化剂，可以大大降低TiO2的反应温度，在1400℃以上的铁水温度即可启动反应，在炮泥中加入氮化物细粉，反应中N2析出，可以促进反应生成TiN，应用昂贵的高纯金属Ti，利用特种设备加工成超微粉，直接加入到炮泥中，增加区域局部钛化物浓度，可以大大提高反应的效率，整体上铁水和炉渣的含钛量没有很大的提高，因此，可以在正常操作条件下实施，不至于产生渣铁过粘、炉缸堆积等弊病，含钛物料的用量也大为减少，因而可以选用高品位的含钛物料或高纯金属钛。
本发明的特征及优点将通过实施例进行详细说明。
【具体实施方式】
本发明一种高炉护炉造壁炮泥，包括以下组分且各组分的质量比例为：高纯钛超微粉5～15份；钛白粉20～25份；碳化硅20～30份；纳米级炭黑10～15份；硅石30～40份；氮化硅细粉2～5份；氮化铝细粉20～30份；四硼酸锂2～10份，所述高纯钛超微粉的纯度在99％以上，所述高纯钛超微粉的粒径为1～5um，所述碳化硅和纳米级炭黑在所有组分中所占的总质量分数为20～30％，所述氮化硅细粉的粒径为0.2～0.5mm，所述氮化铝细粉的粒径为0.1～0.3mm。
实施例一：
所述各组分的质量比例为：高纯钛超微粉15份；钛白粉25份；碳化硅30份；纳米级炭黑15份；硅石40份；氮化硅细粉5份；氮化铝细粉30份；四硼酸锂10份。
实施例二
所述各组分的质量比例为：高纯钛超微粉5份；钛白粉20份；碳化硅20份；纳米级炭黑10份；硅石30份；氮化硅细粉2份；氮化铝细粉20份；四硼酸锂2份。
实施例三
所述各组分的质量比例为：高纯钛超微粉10份；钛白粉22份；碳化硅25份；纳米级炭黑12份；硅石35份；氮化硅细粉3份；氮化铝细粉25份；四硼酸锂8份。
产品主要技术性能指标如下：
上述实施例是对本发明的说明，不是对本发明的限定，任何对本发明简单变换后的方案均属于本发明的保护范围。

Claims (7)

1.一种高炉护炉造壁炮泥，其特征在于：包括以下组分且各组分的质量比例为：高纯钛超微粉5～15份；钛白粉20～25份；碳化硅20～30份；纳米级炭黑10～15份；硅石30～40份；氮化硅细粉2～5份；氮化铝细粉20～30份；
四硼酸锂2～10份。
2.如权利要求1所述的一种高炉护炉造壁炮泥，其特征在于：所述高纯钛超微粉的纯度在99％以上，所述高纯钛超微粉的粒径为1～5um。
3.如权利要求1所述的一种高炉护炉造壁炮泥，其特征在于：所述碳化硅和纳米级炭黑在所有组分中所占的总质量分数为20～30％。
4.如权利要求1所述的一种高炉护炉造壁炮泥，其特征在于：所述氮化硅细粉的粒径为0.2～0.5mm，所述氮化铝细粉的粒径为0.1～0.3mm。
5.如权利要求1所述的一种高炉护炉造壁炮泥，其特征在于：所述各组分的质量比例为：高纯钛超微粉15份；钛白粉25份；碳化硅30份；纳米级炭黑15份；硅石40份；氮化硅细粉5份；氮化铝细粉30份；四硼酸锂10份。
6.如权利要求1所述的一种高炉护炉造壁炮泥，其特征在于：所述各组分的质量比例为：高纯钛超微粉5份；钛白粉20份；碳化硅20份；纳米级炭黑10份；硅石30份；氮化硅细粉2份；氮化铝细粉20份；四硼酸锂2份。
7.如权利要求1所述的一种高炉护炉造壁炮泥，其特征在于：所述各组分的质量比例为：高纯钛超微粉10份；钛白粉22份；碳化硅25份；纳米级炭黑12份；硅石35份；氮化硅细粉3份；氮化铝细粉25份；四硼酸锂8份。
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